diff options
| author | Eric W. Biederman <ebiederm@xmission.com> | 2006-07-27 02:36:23 -0600 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2006-07-27 02:36:23 -0600 |
| commit | 283261998a9846019d898bc454b363e4aaf3d181 (patch) | |
| tree | a4af6da4c5a2c6f7669d918c1f07dc68d6aa0ab2 /purgatory | |
| download | kexec-tools-283261998a9846019d898bc454b363e4aaf3d181.tar.gz | |
kexec-tools-1.101v1.101
- Initial import into git
- initial nbi image formage support
- ppc32 initial register setting fixes.
- gzipped multiboot file support
Diffstat (limited to 'purgatory')
56 files changed, 4478 insertions, 0 deletions
diff --git a/purgatory/Makefile b/purgatory/Makefile new file mode 100644 index 0000000..93f5830 --- /dev/null +++ b/purgatory/Makefile @@ -0,0 +1,68 @@ +# +# Purgatory (an uncomfortable intermediate state) +# In this case the code that runs between kernels +# + +# There is probably a cleaner way to do this but for now this +# should keep us from accidentially include unsafe library functions +# or headers. +PCFLAGS:=-Wall -Os \ + -I$(shell $(CC) -print-file-name=include) \ + -Ipurgatory/include -Ipurgatory/arch/$(ARCH)/include \ + $(CPPFLAGS) + +PCFLAGS += $(call cc-option, -ffreestanding) +PCFLAGS += $(call cc-option, -fnobuiltin) +PCFLAGS += $(call cc-option, -fnostdinc) +PCFLAGS += $(call cc-option, -fno-zero-initialized-in-bss) + +PURGATORY_C_SRCS:= +PURGATORY_C_SRCS += purgatory/purgatory.c +PURGATORY_C_SRCS += purgatory/printf.c +PURGATORY_C_SRCS += purgatory/string.c +PURGATORY_S_OBJS:= + +include purgatory/arch/$(ARCH)/Makefile + + +PURGATORY_C_OBJS:= $(patsubst %.c, $(OBJDIR)/%.o, $(PURGATORY_C_SRCS)) +PURGATORY_C_DEPS:= $(patsubst %.c, $(OBJDIR)/%.d, $(PURGATORY_C_SRCS)) +PURGATORY_S_OBJS:= $(patsubst %.S, $(OBJDIR)/%.o, $(PURGATORY_S_SRCS)) +PURGATORY_S_DEPS:= $(patsubst %.S, $(OBJDIR)/%.d, $(PURGATORY_S_SRCS)) +PURGATORY_SRCS:= $(PURGATORY_S_SRCS) $(PURGATORY_C_SRCS) +PURGATORY_OBJS:= $(PURGATORY_S_OBJS) $(PURGATORY_C_OBJS) +PURGATORY_DEPS:= $(PURGATORY_S_DEPS) $(PURGATORY_C_DEPS) +PURGATORY:= $(OBJDIR)/purgatory/purgatory.ro + +include $(PURGATORY_DEPS) + +$(PURGATORY_C_DEPS): $(OBJDIR)/%.d: %.c + $(MKDIR) -p $(@D) + $(CC) $(PCFLAGS) -M $< | sed -e 's|$(patsubst %.d,%.o,$(@F))|$(patsubst %.d,%.o,$(@))|' > $@ + +$(PURGATORY_S_DEPS): $(OBJDIR)/%.d: %.S + $(MKDIR) -p $(@D) + $(CC) $(PCFLAGS) -M $< | sed -e 's|$(patsubst %.d,%.o,$(@F))|$(patsubst %.d,%.o,$(@))|' > $@ + +$(PURGATORY_C_OBJS): $(OBJDIR)/%.o: %.c $(OBJDIR)/%.d + $(MKDIR) -p $(@D) + $(CC) $(PCFLAGS) -o $@ -c $< + +$(PURGATORY_S_OBJS): $(OBJDIR)/%.o: %.S $(OBJDIR)/%.d + $(MKDIR) -p $(@D) + $(CC) $(PCFLAGS) -o $@ -c $< + +$(PURGATORY): $(PURGATORY_OBJS) $(UTIL_LIB) + $(MKDIR) -p $(@D) + $(LD) $(LDFLAGS) --no-undefined -e purgatory_start -r -o $@ $(PURGATORY_OBJS) $(UTIL_LIB) + +echo:: + @echo "PURGATORY_C_SRCS $(PURGATORY_C_SRCS)" + @echo "PURGATORY_C_DEPS $(PURGATORY_C_DEPS)" + @echo "PURGATORY_C_OBJS $(PURGATORY_C_OBJS)" + @echo "PURGATORY_S_SRCS $(PURGATORY_S_SRCS)" + @echo "PURGATORY_S_DEPS $(PURGATORY_S_DEPS)" + @echo "PURGATORY_S_OBJS $(PURGATORY_S_OBJS)" + @echo "PURGATORY_SRCS $(PURGATORY_SRCS)" + @echo "PURGATORY_DEPS $(PURGATORY_DEPS)" + @echo "PURGATORY_OBJS $(PURGATORY_OBJS)" diff --git a/purgatory/arch/alpha/Makefile b/purgatory/arch/alpha/Makefile new file mode 100644 index 0000000..a626bbd --- /dev/null +++ b/purgatory/arch/alpha/Makefile @@ -0,0 +1,7 @@ +# +# Purgatory alpha +# + +PURGATORY_C_SRCS+= +PURGATORY_S_SRCS+= + diff --git a/purgatory/arch/alpha/include/limits.h b/purgatory/arch/alpha/include/limits.h new file mode 100644 index 0000000..0c6f21f --- /dev/null +++ b/purgatory/arch/alpha/include/limits.h @@ -0,0 +1,57 @@ +#ifndef LIMITS_H +#define LIMITS_H 1 + +/* Number of bits in a `char' */ +#define CHAR_BIT 8 + +/* Minimum and maximum values a `signed char' can hold */ +#define SCHAR_MIN (-128) +#define SCHAR_MAX 127 + +/* Maximum value an `unsigned char' can hold. (Minimum is 0.) */ +#define UCHAR_MAX 255 + +/* Minimum and maximum values a `char' can hold */ +#define CHAR_MIN SCHAR_MIN +#define CHAR_MAX SCHAR_MAX + +/* Minimum and maximum values a `signed short int' can hold */ +#define SHRT_MIN (-32768) +#define SHRT_MAX 32767 + +/* Maximum value an `unsigned short' can hold. (Minimum is 0.) */ +#define USHRT_MAX 65535 + + +/* Minimum and maximum values a `signed int' can hold */ +#define INT_MIN (-INT_MAX - 1) +#define INT_MAX 2147483647 + +/* Maximum value an `unsigned int' can hold. (Minimum is 0.) */ +#define UINT_MAX 4294967295U + + +/* Minimum and maximum values a `signed int' can hold */ +#define INT_MIN (-INT_MAX - 1) +#define INT_MAX 2147483647 + +/* Maximum value an `unsigned int' can hold. (Minimum is 0.) */ +#define UINT_MAX 4294967295U + +/* Minimum and maximum values a `signed long' can hold */ +#define LONG_MAX 9223372036854775807L +#define LONG_MIN (-LONG_MAX - 1L) + +/* Maximum value an `unsigned long' can hold. (Minimum is 0.) */ +#define ULONG_MAX 18446744073709551615UL + +/* Minimum and maximum values a `signed long long' can hold */ +#define LLONG_MAX 9223372036854775807LL +#define LLONG_MIN (-LONG_MAX - 1LL) + + +/* Maximum value an `unsigned long long' can hold. (Minimum is 0.) */ +#define ULLONG_MAX 18446744073709551615ULL + + +#endif /* LIMITS_H */ diff --git a/purgatory/arch/alpha/include/stdint.h b/purgatory/arch/alpha/include/stdint.h new file mode 100644 index 0000000..2f9c592 --- /dev/null +++ b/purgatory/arch/alpha/include/stdint.h @@ -0,0 +1,16 @@ +#ifndef STDINT_H +#define STDINT_H + +typedef unsigned long size_t; + +typedef unsigned char uint8_t; +typedef unsigned short uint16_t; +typedef unsigned int uint32_t; +typedef unsigned long uint64_t; + +typedef signed char int8_t; +typedef signed short int16_t; +typedef signed int int32_t; +typedef signed long int64_t; + +#endif /* STDINT_H */ diff --git a/purgatory/arch/i386/Makefile b/purgatory/arch/i386/Makefile new file mode 100644 index 0000000..8af604c --- /dev/null +++ b/purgatory/arch/i386/Makefile @@ -0,0 +1,14 @@ +# +# Purgatory i386 +# + +PURGATORY_S_SRCS+= purgatory/arch/i386/entry32-16.S +PURGATORY_S_SRCS+= purgatory/arch/i386/entry32-16-debug.S +PURGATORY_S_SRCS+= purgatory/arch/i386/entry32.S +PURGATORY_S_SRCS+= purgatory/arch/i386/setup-x86.S +PURGATORY_S_SRCS+= purgatory/arch/i386/stack.S +PURGATORY_S_SRCS+= purgatory/arch/i386/compat_x86_64.S +PURGATORY_C_SRCS+= purgatory/arch/i386/purgatory-x86.c +PURGATORY_C_SRCS+= purgatory/arch/i386/console-x86.c +PURGATORY_C_SRCS+= purgatory/arch/i386/vga.c +PURGATORY_C_SRCS+= purgatory/arch/i386/pic.c diff --git a/purgatory/arch/i386/compat_x86_64.S b/purgatory/arch/i386/compat_x86_64.S new file mode 100644 index 0000000..1649085 --- /dev/null +++ b/purgatory/arch/i386/compat_x86_64.S @@ -0,0 +1,100 @@ +/* + * kexec: Linux boots Linux + * + * Copyright (C) 2003,2004,2005 Eric Biederman (ebiederm@xmission.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation (version 2 of the License). + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + + .equ MSR_K6_EFER, 0xC0000080 + .equ EFER_LME, 0x00000100 + .equ X86_CR4_PAE, 0x00000020 + .equ CR0_PG, 0x80000000 + + .globl compat_x86_64, compat_x86_64_entry32 + .text + .code64 + .balign 16 +compat_x86_64: + /* Setup a temporary gdt */ + /* This also acts as a serializing instruction ensuring + * my self modifying code works. + */ + lgdt gdt(%rip) + + /* Switch to 32bit compatiblity mode */ + ljmp *lm_exit_addr(%rip) +lm_exit: + .code32 + + /* Disable paging */ + movl %cr0, %eax + andl $~CR0_PG, %eax + movl %eax, %cr0 + + /* Disable long mode */ + movl $MSR_K6_EFER, %ecx + rdmsr + andl $~EFER_LME, %eax + wrmsr + + /* Disable PAE */ + xorl %eax, %eax + movl %eax, %cr4 + + /* load the data segments */ + movl $0x18, %eax /* data segment */ + movl %eax, %ds + movl %eax, %es + movl %eax, %ss + movl %eax, %fs + movl %eax, %gs + + /* set all of the registers to known values */ + /* leave %esp alone */ + + xorl %eax, %eax + xorl %ebx, %ebx + xorl %ecx, %ecx + xorl %edx, %edx + xorl %esi, %esi + xorl %edi, %edi + xorl %ebp, %ebp + + jmp *compat_x86_64_entry32 + + .section ".rodata" + .balign 16 +gdt: /* 0x00 unusable segment + * 0x08 unused + * so use them as the gdt ptr + */ + .word gdt_end - gdt - 1 + # A quad word pointer to the gdt with the high 32bits 0 + .long gdt, 0 + .word 0, 0, 0 + + /* 0x10 4GB flat code segment */ + .word 0xFFFF, 0x0000, 0x9A00, 0x00CF + /* 0x18 4GB flat data segment */ + .word 0xFFFF, 0x0000, 0x9200, 0x00CF +gdt_end: + +lm_exit_addr: + .long lm_exit + .long 0x10 + +compat_x86_64_entry32: + .long 0 +.size compat_x86_64_entry32, . - compat_x86_64_entry32 diff --git a/purgatory/arch/i386/console-x86.c b/purgatory/arch/i386/console-x86.c new file mode 100644 index 0000000..128f202 --- /dev/null +++ b/purgatory/arch/i386/console-x86.c @@ -0,0 +1,134 @@ +#include <arch/io.h> +#include <purgatory.h> + +/* + * VGA + * ============================================================================= + */ + +/* Simple VGA output */ + +#define VGABASE ((void *)0xb8000) + +#define MAX_YPOS 25 +#define MAX_XPOS 80 + +static int current_ypos = 1, current_xpos = 0; +uint8_t console_vga = 0; + +static void putchar_vga(int ch) +{ + int i, k, j; + if (!console_vga) + return; + + if (current_ypos >= MAX_YPOS) { + /* scroll 1 line up */ + for (k = 1, j = 0; k < MAX_YPOS; k++, j++) { + for (i = 0; i < MAX_XPOS; i++) { + writew(readw(VGABASE + 2*(MAX_XPOS*k + i)), + VGABASE + 2*(MAX_XPOS*j + i)); + } + } + for (i = 0; i < MAX_XPOS; i++) + writew(0x720, VGABASE + 2*(MAX_XPOS*j + i)); + current_ypos = MAX_YPOS-1; + } + if (ch == '\n') { + current_xpos = 0; + current_ypos++; + } else if (ch != '\r') { + writew(((0x7 << 8) | (unsigned short) ch), + VGABASE + 2*(MAX_XPOS*current_ypos + + current_xpos++)); + if (current_xpos >= MAX_XPOS) { + current_xpos = 0; + current_ypos++; + } + } +} + +/* + * Serial + * ============================================================================= + */ + +/* Base Address */ +uint8_t console_serial = 0; +uint16_t serial_base = 0x3f8; /* TTYS0 */ +uint32_t serial_baud = 0; + +#define XMTRDY 0x20 + +#define DLAB 0x80 + +#define TXR 0 /* Transmit register (WRITE) */ +#define TBR 0 /* Transmit register (WRITE) */ +#define RXR 0 /* Receive register (READ) */ +#define IER 1 /* Interrupt Enable */ +#define IIR 2 /* Interrupt ID */ +#define FCR 2 /* FIFO control */ +#define LCR 3 /* Line control */ +#define MCR 4 /* Modem control */ +#define LSR 5 /* Line Status */ +#define MSR 6 /* Modem Status */ +#define DLL 0 /* Divisor Latch Low */ +#define DLH 1 /* Divisor latch High */ + +static void serial_init(void) +{ + static int initialized = 0; + if (!initialized) { + unsigned lcr; + outb(0x3, serial_base + LCR); /* 8n1 */ + outb(0, serial_base + IER); /* no interrupt */ + outb(0, serial_base + FCR); /* no fifo */ + outb(0x3, serial_base + MCR); /* DTR + RTS */ + + lcr = inb(serial_base + LCR); + outb(lcr | DLAB, serial_base + LCR); + /* By default don't change the serial port baud rate */ + if (serial_baud) { + unsigned divisor = 115200 / serial_baud; + outb(divisor & 0xff, serial_base + DLL); + outb((divisor >> 8) & 0xff, serial_base + DLH); + } + outb(lcr & ~DLAB, serial_base + LCR); + initialized = 1; + } +} + +static void serial_tx_byte(unsigned byte) +{ + /* Ensure the serial port is initialized */ + serial_init(); + + /* Wait until I can send a byte */ + while((inb(serial_base + LSR) & 0x20) == 0) + ; + outb(byte, serial_base + TBR); + /* Wait until the byte is transmitted */ + while(!(inb(serial_base + LSR) & 0x40)) + ; +} + +static void putchar_serial(int ch) +{ + if (!console_serial) { + return; + } + if (ch == '\n') { + serial_tx_byte('\r'); + } + serial_tx_byte(ch); +} + +/* Generic wrapper function */ + +void putchar(int ch) +{ + putchar_vga(ch); + putchar_serial(ch); +} + + diff --git a/purgatory/arch/i386/entry16.S b/purgatory/arch/i386/entry16.S new file mode 100644 index 0000000..c4a3dad --- /dev/null +++ b/purgatory/arch/i386/entry16.S @@ -0,0 +1,160 @@ +/* + * kexec: Linux boots Linux + * + * Copyright (C) 2003,2004 Eric Biederman (ebiederm@xmission.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation (version 2 of the License). + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#undef i386 + .text + .globl entry16, entry16_regs + .arch i386 + .balign 16 +entry16: + .code32 + /* Compute where I am running at */ + movl $entry16, %ebx + + /* Fixup my real mode segment */ + movl %ebx, %eax + shrl $4, %eax + movw %ax, 2 + realptr + + /* Fixup the gdt */ + movl %ebx, %eax + shll $16, %eax + + movl %ebx, %ecx + shrl $16, %ecx + andl $0xff, %ecx + + movl %ebx, %edx + andl $0xff000000, %edx + orl %edx, %ecx + + orl %eax, 0x08 + gdt + orl %ecx, 0x0c + gdt + orl %eax, 0x10 + gdt + orl %ecx, 0x14 + gdt + + + /* Setup the classic BIOS interrupt table at 0x0 */ + lidt idtptr + + /* Provide us with 16bit segments that we can use */ + lgdt gdt + + /* Note we don't disable the a20 line, (this shouldn't be required) + * The code to do it is in kexec_test and it is a real pain. + * I will worry about that when I need it. + */ + + /* Load 16bit data segments, to ensure the segment limits are set */ + movl $0x10, %eax + movl %eax, %ds + movl %eax, %es + movl %eax, %ss + movl %eax, %fs + movl %eax, %gs + + /* switch to 16bit mode */ + ljmp $0x08, $1f - entry16 +1: + .code16 + /* Disable Paging and protected mode */ + /* clear the PG & PE bits of CR0 */ + movl %cr0,%eax + andl $~((1 << 31)|(1<<0)),%eax + movl %eax,%cr0 + + /* make intersegment jmp to flush the processor pipeline + * and reload %cs:%eip (to clear upper 16 bits of %eip). + */ + ljmp *(realptr - entry16) +3: + /* we are in real mode now + * set up the real mode segment registers : %ds, $ss, %es + */ + /* Setup the data segment */ + movw %cs, %ax + movw %ax, %ds + + /* Load the registers */ + movl eax - entry16, %eax + movl ebx - entry16, %ebx + movl ecx - entry16, %ecx + movl edx - entry16, %edx + movl esi - entry16, %esi + movl edi - entry16, %esi + movl esp - entry16, %esp + movl ebp - entry16, %ebp + movw es - entry16, %es + movw ss - entry16, %ss + movw fs - entry16, %fs + movw gs - entry16, %gs + movw ds - entry16, %ds + + /* Jump to the kernel entrypoint */ + ljmp %cs:*(realdest - entry16) + + .balign 4 +entry16_regs: +eax: .long 0x00000000 +ebx: .long 0x00000000 +ecx: .long 0x00000000 +edx: .long 0x00000000 +esi: .long 0x00000000 +edi: .long 0x00000000 +esp: .long 0x00000000 +ebp: .long 0x00000000 +ds: .word 0x0000 +es: .word 0x0000 +ss: .word 0x0000 +fs: .word 0x0000 +gs: .word 0x0000 +realdest: +ip: .word 0x0000 +cs: .word 0x0000 +pad: .word 0x0000 + .size entry16_regs, . - entry16_regs + + .balign 16 +realptr: + .word 3b - entry16 + .word 0x0000 + + .data + .balign 16 + +idtptr: + /* 256 entry idt at 0 */ + .word 0x400 - 1 + .word 0, 0 + + .balign 16 +gdt: + /* 0x00 unusable segment so used as the gdt ptr */ + .word gdt_end - gdt - 1 + .long gdt + .word 0 + + /* 0x08 16 bit real mode code segment */ + .word 0xffff, 0x0000 + .byte 0x00, 0x9b, 0x00, 0x00 + + /* 0x10 16 bit real mode data segment */ + .word 0xffff, 0x0000 + .byte 0x00, 0x93, 0x00, 0x00 +gdt_end: diff --git a/purgatory/arch/i386/entry32-16-debug.S b/purgatory/arch/i386/entry32-16-debug.S new file mode 100644 index 0000000..fdf70ed --- /dev/null +++ b/purgatory/arch/i386/entry32-16-debug.S @@ -0,0 +1,195 @@ +/* + * kexec: Linux boots Linux + * + * Copyright (C) 2003,2004 Eric Biederman (ebiederm@xmission.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation (version 2 of the License). + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include "arch/debug.h" + +#undef i386 + .text + .globl entry16_debug, entry16_debug_regs + .globl entry16_debug_pre32 + .globl entry16_debug_first32 + .globl entry16_debug_old_first32 + .arch i386 + .balign 16 +entry16_debug: + .code32 + /* Compute where I am running at */ + movl $entry16_debug, %ebx + + /* Fixup my real mode segment */ + movl %ebx, %eax + shrl $4, %eax + movw %ax, 2 + realptr + + /* Fixup the gdt */ + movl %ebx, %eax + shll $16, %eax + + movl %ebx, %ecx + shrl $16, %ecx + andl $0xff, %ecx + + movl %ebx, %edx + andl $0xff000000, %edx + orl %edx, %ecx + + orl %eax, 0x08 + gdt + orl %ecx, 0x0c + gdt + orl %eax, 0x10 + gdt + orl %ecx, 0x14 + gdt + + +DEBUG('a') + /* Setup the classic BIOS interrupt table at 0x0 */ + lidt idtptr + +DEBUG('b') + /* Provide us with 16bit segments that we can use */ + lgdt gdt + +DEBUG('c') + /* Note we don't disable the a20 line, (this shouldn't be required) + * The code to do it is in kexec_test and it is a real pain. + * I will worry about that when I need it. + */ + + /* Load 16bit data segments, to ensure the segment limits are set */ + movl $0x10, %eax + movl %eax, %ds + movl %eax, %es + movl %eax, %ss + movl %eax, %fs + movl %eax, %gs + +DEBUG('d') + + /* switch to 16bit mode */ + ljmp $0x08, $1f - entry16_debug +1: + .code16 +DEBUG('e') + /* Disable Paging and protected mode */ + /* clear the PG & PE bits of CR0 */ + movl %cr0,%eax + andl $~((1 << 31)|(1<<0)),%eax + movl %eax,%cr0 + +DEBUG('f') + /* make intersegment jmp to flush the processor pipeline + * and reload %cs:%eip (to clear upper 16 bits of %eip). + */ + ljmp *(realptr - entry16_debug) +3: +DEBUG('g') + /* we are in real mode now + * set up the real mode segment registers : %ds, $ss, %es + */ + /* Setup the data segment */ + movw %cs, %ax + movw %ax, %ds + +DEBUG('h') + /* Load the registers */ + movl eax - entry16_debug, %eax + movl ebx - entry16_debug, %ebx + movl ecx - entry16_debug, %ecx + movl edx - entry16_debug, %edx + movl esi - entry16_debug, %esi + movl edi - entry16_debug, %esi + movl esp - entry16_debug, %esp + movl ebp - entry16_debug, %ebp + movw es - entry16_debug, %es + movw ss - entry16_debug, %ss + movw fs - entry16_debug, %fs + movw gs - entry16_debug, %gs + movw ds - entry16_debug, %ds + + /* Jump to the kernel entrypoint */ + ljmp %cs:*(realdest - entry16_debug) + + .balign 4 +entry16_debug_regs: +eax: .long 0x00000000 +ebx: .long 0x00000000 +ecx: .long 0x00000000 +edx: .long 0x00000000 +esi: .long 0x00000000 +edi: .long 0x00000000 +esp: .long 0x00000000 +ebp: .long 0x00000000 +ds: .word 0x0000 +es: .word 0x0000 +ss: .word 0x0000 +fs: .word 0x0000 +gs: .word 0x0000 +realdest: +ip: .word 0x0000 +cs: .word 0x0000 +pad: .word 0x0000 + .size entry16_debug_regs, . - entry16_debug_regs + + .balign 16 +realptr: + .word 3b - entry16_debug + .word 0x0000 + + .data + .balign 16 + +idtptr: + /* 256 entry idt at 0 */ + .word 0x400 - 1 + .word 0, 0 + +gdt: + /* 0x00 unusable segment so used as the gdt ptr */ + .word gdt_end - gdt - 1 + .long gdt + .word 0 + + /* 0x08 16 bit real mode code segment */ + .word 0xffff, 0x0000 + .byte 0x00, 0x9b, 0x00, 0x00 + + /* 0x10 16 bit real mode data segment */ + .word 0xffff, 0x0000 + .byte 0x00, 0x93, 0x00, 0x00 +gdt_end: + .size gdt, . - gdt + + .text +entry16_debug_pre32: + .code16 +DEBUG('i') + cli # no interrupts allowed ! + movb $0x80, %al # disable NMI for bootup + # sequence + outb %al, $0x70 + lret +.size entry16_debug_pre32, . - entry16_debug_pre32 + +entry16_debug_first32: + .code32 +DEBUG('j') + .byte 0xb8 /* movl $0x10000, %eax */ +entry16_debug_old_first32: + .long 0x100000 + .size entry16_debug_old_first32, . - entry16_debug_old_first32 + jmp %eax +.size entry16_debug_first32, . - entry16_debug_first32 diff --git a/purgatory/arch/i386/entry32-16.S b/purgatory/arch/i386/entry32-16.S new file mode 100644 index 0000000..a37fb55 --- /dev/null +++ b/purgatory/arch/i386/entry32-16.S @@ -0,0 +1,160 @@ +/* + * kexec: Linux boots Linux + * + * Copyright (C) 2003,2004 Eric Biederman (ebiederm@xmission.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation (version 2 of the License). + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#undef i386 + .text + .globl entry16, entry16_regs + .arch i386 + .balign 16 +entry16: + .code32 + /* Compute where I am running at */ + movl $entry16_debug, %ebx + + /* Fixup my real mode segment */ + movl %ebx, %eax + shrl $4, %eax + movw %ax, 2 + realptr + + /* Fixup the gdt */ + movl %ebx, %eax + shll $16, %eax + + movl %ebx, %ecx + shrl $16, %ecx + andl $0xff, %ecx + + movl %ebx, %edx + andl $0xff000000, %edx + orl %edx, %ecx + + orl %eax, 0x08 + gdt + orl %ecx, 0x0c + gdt + orl %eax, 0x10 + gdt + orl %ecx, 0x14 + gdt + + + /* Setup the classic BIOS interrupt table at 0x0 */ + lidt idtptr + + /* Provide us with 16bit segments that we can use */ + lgdt gdt + + /* Note we don't disable the a20 line, (this shouldn't be required) + * The code to do it is in kexec_test and it is a real pain. + * I will worry about that when I need it. + */ + + /* Load 16bit data segments, to ensure the segment limits are set */ + movl $0x10, %eax + movl %eax, %ds + movl %eax, %es + movl %eax, %ss + movl %eax, %fs + movl %eax, %gs + + /* switch to 16bit mode */ + ljmp $0x08, $1f - entry16 +1: + .code16 + /* Disable Paging and protected mode */ + /* clear the PG & PE bits of CR0 */ + movl %cr0,%eax + andl $~((1 << 31)|(1<<0)),%eax + movl %eax,%cr0 + + /* make intersegment jmp to flush the processor pipeline + * and reload %cs:%eip (to clear upper 16 bits of %eip). + */ + ljmp *(realptr - entry16) +3: + /* we are in real mode now + * set up the real mode segment registers : %ds, $ss, %es + */ + /* Setup the data segment */ + movw %cs, %ax + movw %ax, %ds + + /* Load the registers */ + movl eax - entry16, %eax + movl ebx - entry16, %ebx + movl ecx - entry16, %ecx + movl edx - entry16, %edx + movl esi - entry16, %esi + movl edi - entry16, %esi + movl esp - entry16, %esp + movl ebp - entry16, %ebp + movw es - entry16, %es + movw ss - entry16, %ss + movw fs - entry16, %fs + movw gs - entry16, %gs + movw ds - entry16, %ds + + /* Jump to the kernel entrypoint */ + ljmp %cs:*(realdest - entry16) + + .balign 4 +entry16_regs: +eax: .long 0x00000000 +ebx: .long 0x00000000 +ecx: .long 0x00000000 +edx: .long 0x00000000 +esi: .long 0x00000000 +edi: .long 0x00000000 +esp: .long 0x00000000 +ebp: .long 0x00000000 +ds: .word 0x0000 +es: .word 0x0000 +ss: .word 0x0000 +fs: .word 0x0000 +gs: .word 0x0000 +realdest: +ip: .word 0x0000 +cs: .word 0x0000 +pad: .word 0x0000 + .size entry16_regs, . - entry16_regs + + .balign 16 +realptr: + .word 3b - entry16 + .word 0x0000 + + .data + .balign 16 + +idtptr: + /* 256 entry idt at 0 */ + .word 0x400 - 1 + .word 0, 0 + + .balign 16 +gdt: + /* 0x00 unusable segment so used as the gdt ptr */ + .word gdt_end - gdt - 1 + .long gdt + .word 0 + + /* 0x08 16 bit real mode code segment */ + .word 0xffff, 0x0000 + .byte 0x00, 0x9b, 0x00, 0x00 + + /* 0x10 16 bit real mode data segment */ + .word 0xffff, 0x0000 + .byte 0x00, 0x93, 0x00, 0x00 +gdt_end: diff --git a/purgatory/arch/i386/entry32.S b/purgatory/arch/i386/entry32.S new file mode 100644 index 0000000..f7a494f --- /dev/null +++ b/purgatory/arch/i386/entry32.S @@ -0,0 +1,110 @@ +/* + * purgatory: setup code + * + * Copyright (C) 2003,2004 Eric Biederman (ebiederm@xmission.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation (version 2 of the License). + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#undef i386 + + .text + .arch i386 + .globl entry32, entry32_regs +entry32: + .code32 + + /* Setup a gdt that should that is generally usefully */ + lgdt %cs:gdt + + /* load the data segments */ + movl $0x18, %eax /* data segment */ + movl %eax, %ds + movl %eax, %es + movl %eax, %ss + movl %eax, %fs + movl %eax, %gs + + /* load the code segment */ + ljmp $0x10,$1f +1: + + /* Load the registers */ + movl eax, %eax + movl ecx, %ecx + movl edx, %edx + movl esi, %esi + movl edi, %edi + movl esp, %esp + movl ebp, %ebp + movl ebx, %ebx + + /* Jump to the loaded image */ + jmpl *(eip) + + .section ".rodata" + .balign 16 +gdt: + /* 0x00 unusable segment so used as the gdt ptr */ + .word gdt_end - gdt - 1 + .long gdt + .word 0 + + /* 0x08 dummy */ + .word 0x0000, 0x0000, 0x0000, 0x000 + + /* Documented linux kernel segments */ + /* 0x10 4GB flat code segment */ + .word 0xFFFF, 0x0000, 0x9A00, 0x00CF + /* 0x18 4GB flat data segment */ + .word 0xFFFF, 0x0000, 0x9200, 0x00CF + + /* 0x20 dummy */ + .word 0x0000, 0x0000, 0x0000, 0x000 + /* 0x28 dummy */ + .word 0x0000, 0x0000, 0x0000, 0x000 + /* 0x30 dummy */ + .word 0x0000, 0x0000, 0x0000, 0x000 + /* 0x38 dummy */ + .word 0x0000, 0x0000, 0x0000, 0x000 + /* 0x40 dummy */ + .word 0x0000, 0x0000, 0x0000, 0x000 + /* 0x48 dummy */ + .word 0x0000, 0x0000, 0x0000, 0x000 + /* 0x50 dummy */ + .word 0x0000, 0x0000, 0x0000, 0x000 + /* 0x58 dummy */ + .word 0x0000, 0x0000, 0x0000, 0x000 + + /* Segments used by the 2.5.x kernel */ + /* 0x60 4GB flat code segment */ + .word 0xFFFF, 0x0000, 0x9A00, 0x00CF + /* 0x68 4GB flat data segment */ + .word 0xFFFF, 0x0000, 0x9200, 0x00CF +gdt_end: + + .data + .balign 4 +entry32_regs: +eax: .long 0x00000000 +ebx: .long 0x00000000 +ecx: .long 0x00000000 +edx: .long 0x00000000 +esi: .long 0x00000000 +edi: .long 0x00000000 +esp: .long 0x00000000 +ebp: .long 0x00000000 +eip: .long entry16 + .size entry32_regs, . - entry32_regs + diff --git a/purgatory/arch/i386/include/arch/debug.h b/purgatory/arch/i386/include/arch/debug.h new file mode 100644 index 0000000..69deaf1 --- /dev/null +++ b/purgatory/arch/i386/include/arch/debug.h @@ -0,0 +1,316 @@ +/* Base Address */ +#define TTYS0_BASE 0x3f8 +/* Data */ +#define TTYS0_RBR (TTYS0_BASE+0x00) +#define TTYS0_TBR (TTYS0_BASE+0x00) +/* Control */ +#define TTYS0_IER (TTYS0_BASE+0x01) +#define TTYS0_IIR (TTYS0_BASE+0x02) +#define TTYS0_FCR (TTYS0_BASE+0x02) +#define TTYS0_LCR (TTYS0_BASE+0x03) +#define TTYS0_MCR (TTYS0_BASE+0x04) + +#define TTYS0_DLL (TTYS0_BASE+0x00) +#define TTYS0_DLM (TTYS0_BASE+0x01) +/* Status */ +#define TTYS0_LSR (TTYS0_BASE+0x05) +#define TTYS0_MSR (TTYS0_BASE+0x06) +#define TTYS0_SCR (TTYS0_BASE+0x07) + +#define TTYS0_BAUD 9600 +#define TTYS0_DIV (115200/TTYS0_BAUD) +#define TTYS0_DIV_LO (TTYS0_DIV&0xFF) +#define TTYS0_DIV_HI ((TTYS0_DIV >> 8)&0xFF) + +#if ((115200%TTYS0_BAUD) != 0) +#error Bad ttyS0 baud rate +#endif + +#define TTYS0_INIT \ + /* disable interrupts */ \ + movb $0x00, %al ; \ + movw $TTYS0_IER, %dx ; \ + outb %al, %dx ; \ + ; \ + /* enable fifos */ \ + movb $0x01, %al ; \ + movw $TTYS0_FCR, %dx ; \ + outb %al, %dx ; \ + ; \ + /* Set Baud Rate Divisor to TTYS0_BAUD */ \ + movw $TTYS0_LCR, %dx ; \ + movb $0x83, %al ; \ + outb %al, %dx ; \ + ; \ + movw $TTYS0_DLL, %dx ; \ + movb $TTYS0_DIV_LO, %al ; \ + outb %al, %dx ; \ + ; \ + movw $TTYS0_DLM, %dx ; \ + movb $TTYS0_DIV_HI, %al ; \ + outb %al, %dx ; \ + ; \ + movw $TTYS0_LCR, %dx ; \ + movb $0x03, %al ; \ + outb %al, %dx + + + /* uses: ax, dx */ +#define TTYS0_TX_AL \ + mov %al, %ah ; \ +9: mov $TTYS0_LSR, %dx ; \ + inb %dx, %al ; \ + test $0x20, %al ; \ + je 9b ; \ + mov $TTYS0_TBR, %dx ; \ + mov %ah, %al ; \ + outb %al, %dx + + /* uses: ax, dx */ +#define TTYS0_TX_CHAR(byte) \ + mov byte, %al ; \ + TTYS0_TX_AL + + /* uses: eax, dx */ +#define TTYS0_TX_HEX32(lword) \ + mov lword, %eax ; \ + shr $28, %eax ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %eax ; \ + shr $24, %eax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %eax ; \ + shr $20, %eax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %eax ; \ + shr $16, %eax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %eax ; \ + shr $12, %eax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %eax ; \ + shr $8, %eax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %eax ; \ + shr $4, %eax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %eax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL + + /* uses: rax, dx */ +#define TTYS0_TX_HEX64(lword) \ + mov lword, %rax ; \ + shr $60, %rax ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + shr $56, %rax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + shr $52, %rax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + shr $48, %rax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + shr $44, %rax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + shr $40, %rax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + shr $36, %rax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + shr $32, %rax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + shr $28, %rax ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + shr $24, %rax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + shr $20, %rax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + shr $16, %rax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + shr $12, %rax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + shr $8, %rax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + shr $4, %rax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL + + +#define DEBUG(x) TTYS0_TX_CHAR($x) ; TTYS0_TX_CHAR($'\r') ; TTYS0_TX_CHAR($'\n') +#define DEBUG_TX_HEX32(x) TTYS0_TX_HEX32(x); TTYS0_TX_CHAR($'\r') ; TTYS0_TX_CHAR($'\n') +#define DEBUG_TX_HEX64(x) TTYS0_TX_HEX64(x); TTYS0_TX_CHAR($'\r') ; TTYS0_TX_CHAR($'\n') diff --git a/purgatory/arch/i386/include/arch/io.h b/purgatory/arch/i386/include/arch/io.h new file mode 100644 index 0000000..13ad887 --- /dev/null +++ b/purgatory/arch/i386/include/arch/io.h @@ -0,0 +1,98 @@ +#ifndef ARCH_IO_H +#define ARCH_IO_H + +#include <stdint.h> +/* Helper functions for directly doing I/O */ + +extern inline uint8_t inb(uint16_t port) +{ + uint8_t result; + + __asm__ __volatile__ ( + "inb %w1,%0" + :"=a" (result) + :"Nd" (port)); + return result; +} + +extern inline uint16_t inw(uint16_t port) +{ + uint16_t result; + + __asm__ __volatile__ ( + "inw %w1,%0" + :"=a" (result) + :"Nd" (port)); + return result; +} + +extern inline uint32_t inl(uint32_t port) +{ + uint32_t result; + + __asm__ __volatile__ ( + "inl %w1,%0" + :"=a" (result) + :"Nd" (port)); + return result; +} + +extern inline void outb (uint8_t value, uint16_t port) +{ + __asm__ __volatile__ ( + "outb %b0,%w1" + : + :"a" (value), "Nd" (port)); +} + +extern inline void outw (uint16_t value, uint16_t port) +{ + __asm__ __volatile__ ( + "outw %w0,%w1" + : + :"a" (value), "Nd" (port)); +} + +extern inline void outl (uint32_t value, uint16_t port) +{ + __asm__ __volatile__ ( + "outl %0,%w1" + : + :"a" (value), "Nd" (port)); +} + + +/* + * readX/writeX() are used to access memory mapped devices. On some + * architectures the memory mapped IO stuff needs to be accessed + * differently. On the x86 architecture, we just read/write the + * memory location directly. + */ + +static inline unsigned char readb(const volatile void *addr) +{ + return *(volatile unsigned char *) addr; +} +static inline unsigned short readw(const volatile void *addr) +{ + return *(volatile unsigned short *) addr; +} +static inline unsigned int readl(const volatile void *addr) +{ + return *(volatile unsigned int *) addr; +} + +static inline void writeb(unsigned char b, volatile void *addr) +{ + *(volatile unsigned char *) addr = b; +} +static inline void writew(unsigned short b, volatile void *addr) +{ + *(volatile unsigned short *) addr = b; +} +static inline void writel(unsigned int b, volatile void *addr) +{ + *(volatile unsigned int *) addr = b; +} + +#endif /* ARCH_IO_H */ diff --git a/purgatory/arch/i386/include/limits.h b/purgatory/arch/i386/include/limits.h new file mode 100644 index 0000000..d5a5a02 --- /dev/null +++ b/purgatory/arch/i386/include/limits.h @@ -0,0 +1,58 @@ +#ifndef LIMITS_H +#define LIMITS_H 1 + + +/* Number of bits in a `char' */ +#define CHAR_BIT 8 + +/* Minimum and maximum values a `signed char' can hold */ +#define SCHAR_MIN (-128) +#define SCHAR_MAX 127 + +/* Maximum value an `unsigned char' can hold. (Minimum is 0.) */ +#define UCHAR_MAX 255 + +/* Minimum and maximum values a `char' can hold */ +#define CHAR_MIN SCHAR_MIN +#define CHAR_MAX SCHAR_MAX + +/* Minimum and maximum values a `signed short int' can hold */ +#define SHRT_MIN (-32768) +#define SHRT_MAX 32767 + +/* Maximum value an `unsigned short' can hold. (Minimum is 0.) */ +#define USHRT_MAX 65535 + + +/* Minimum and maximum values a `signed int' can hold */ +#define INT_MIN (-INT_MAX - 1) +#define INT_MAX 2147483647 + +/* Maximum value an `unsigned int' can hold. (Minimum is 0.) */ +#define UINT_MAX 4294967295U + + +/* Minimum and maximum values a `signed int' can hold */ +#define INT_MIN (-INT_MAX - 1) +#define INT_MAX 2147483647 + +/* Maximum value an `unsigned int' can hold. (Minimum is 0.) */ +#define UINT_MAX 4294967295U + +/* Minimum and maximum values a `signed long' can hold */ +#define LONG_MAX 2147483647L +#define LONG_MIN (-LONG_MAX - 1L) + +/* Maximum value an `unsigned long' can hold. (Minimum is 0.) */ +#define ULONG_MAX 4294967295UL + +/* Minimum and maximum values a `signed long long' can hold */ +#define LLONG_MAX 9223372036854775807LL +#define LLONG_MIN (-LONG_MAX - 1LL) + + +/* Maximum value an `unsigned long long' can hold. (Minimum is 0.) */ +#define ULLONG_MAX 18446744073709551615ULL + + +#endif /* LIMITS_H */ diff --git a/purgatory/arch/i386/include/stdint.h b/purgatory/arch/i386/include/stdint.h new file mode 100644 index 0000000..79262c2 --- /dev/null +++ b/purgatory/arch/i386/include/stdint.h @@ -0,0 +1,16 @@ +#ifndef STDINT_H +#define STDINT_H + +typedef unsigned long size_t; + +typedef unsigned char uint8_t; +typedef unsigned short uint16_t; +typedef unsigned int uint32_t; +typedef unsigned long long uint64_t; + +typedef signed char int8_t; +typedef signed short int16_t; +typedef signed int int32_t; +typedef signed long long int64_t; + +#endif /* STDINT_H */ diff --git a/purgatory/arch/i386/linux-entry16.S b/purgatory/arch/i386/linux-entry16.S new file mode 100644 index 0000000..f366a11 --- /dev/null +++ b/purgatory/arch/i386/linux-entry16.S @@ -0,0 +1,623 @@ +/* + * kexec: Linux boots Linux + * + * Copyright (C) 2003,2004 Eric Biederman (ebiederm@xmission.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation (version 2 of the License). + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#if 1 +#define TTYS0_BASE 0x3f8 +#define TTYS0_RBR (TTYS0_BASE+0x00) +#define TTYS0_TBR TTYS0_RBR +#define TTYS0_LSR (TTYS0_BASE+0x05) + + + /* uses: ax, dx */ +#define TTYS0_TX_AL \ + mov %al, %ah ; \ +9: mov $TTYS0_LSR, %dx ; \ + inb %dx, %al ; \ + test $0x20, %al ; \ + je 9b ; \ + mov $TTYS0_TBR, %dx ; \ + mov %ah, %al ; \ + outb %al, %dx ; \ +9: mov $TTYS0_LSR, %dx ; \ + inb %dx, %al ; \ + test $0x40, %al ; \ + jz 9b + + + + /* uses: ax, dx */ +#define TTYS0_TX_CHAR(byte) \ + mov byte, %al ; \ + TTYS0_TX_AL + + /* uses: ax, dx */ +#define TTYS0_TX_HEX32(lword) \ + mov lword, %eax ; \ + shr $28, %eax ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %eax ; \ + shr $24, %eax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %eax ; \ + shr $20, %eax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %eax ; \ + shr $16, %eax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %eax ; \ + shr $12, %eax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %eax ; \ + shr $8, %eax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %eax ; \ + shr $4, %eax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %eax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL + + +#define DEBUG(x) TTYS0_TX_CHAR($x) ; TTYS0_TX_CHAR($'\r') ; TTYS0_TX_CHAR($'\n') +#define DEBUG_TX_HEX32(x) TTYS0_TX_HEX32(x) ; TTYS0_TX_CHAR($'\r') ; TTYS0_TX_CHAR($'\n') +#else +#define DEBUG(x) +#define DEBUG_TX_HEX32(x) +#endif + +#undef i386 + .text + .globl entry16, entry16_regs + .arch i386 + .balign 16 +entry16: + .code32 + +DEBUG('a') + /* Setup the classic BIOS interrupt table at 0x0 */ + lidt idtptr + +DEBUG('b') + /* Provide us with 16bit segments that we can use */ + lgdt gdt + +DEBUG('c') + /* Note we don't disable the a20 line, (this shouldn't be required) + * The code to do it is in kexec_test and it is a real pain. + * I will worry about that when I need it. + */ + + /* Load 16bit data segments, to ensure the segment limits are set */ + movl $0x10, %eax + movl %eax, %ds + movl %eax, %es + movl %eax, %ss + movl %eax, %fs + movl %eax, %gs + +DEBUG('d') + + /* switch to 16bit mode */ + ljmp $0x08, $1f - entry16 +1: + .code16 +DEBUG('e') + /* Disable Paging and protected mode */ + /* clear the PG & PE bits of CR0 */ + movl %cr0,%eax + andl $~((1 << 31)|(1<<0)),%eax + movl %eax,%cr0 + +DEBUG('f') + /* make intersegment jmp to flush the processor pipeline + * and reload %cs:%eip (to clear upper 16 bits of %eip). + */ + ljmp *(realptr - entry16) +3: +DEBUG('g') + /* we are in real mode now + * set up the real mode segment registers : %ds, $ss, %es + */ + /* Setup the data segment */ + movw %cs, %ax + movw %ax, %ds + +DEBUG('h') + /* Load the registers */ + movl eax - entry16, %eax + movl ebx - entry16, %ebx + movl ecx - entry16, %ecx + movl edx - entry16, %edx + movl esi - entry16, %esi + movl edi - entry16, %esi + movl esp - entry16, %esp + movl ebp - entry16, %ebp + movw es - entry16, %es + movw ss - entry16, %ss + movw fs - entry16, %fs + movw gs - entry16, %gs + movw ds - entry16, %ds + + /* Jump to the kernel entrypoint */ + ljmp %cs:*(realdest - entry16) + + .balign 4 +entry16_regs: +eax: .long 0x00000000 +ebx: .long 0x00000000 +ecx: .long 0x00000000 +edx: .long 0x00000000 +esi: .long 0x00000000 +edi: .long 0x00000000 +esp: .long 0x00000000 +ebp: .long 0x00000000 +ds: .word 0x0000 +es: .word 0x0000 +ss: .word 0x0000 +fs: .word 0x0000 +gs: .word 0x0000 +realdest: +ip: .word 0x0000 +cs: .word 0x0000 + .size entry16_regs, . - entry16_regs + + .balign 16 +realptr: + .word 3b - entry16 + .word 0x0000 + + .data + .balign 4 + +idtptr: + /* 256 entry idt at 0 */ + .word 0x400 - 1 + .word 0, 0 + +gdt: + /* 0x00 unusable segment so used as the gdt ptr */ + .word gdt_end - gdt - 1 + .long gdt + .word 0 + + /* 0x08 16 bit real mode code segment */ + .word 0xffff, 0x0000 + .byte 0x00, 0x9b, 0x00, 0x00 + + /* 0x10 16 bit real mode data segment */ + .word 0xffff, 0x0000 + .byte 0x00, 0x93, 0x00, 0x00 +gdt_end: +/* + * kexec: Linux boots Linux + * + * Copyright (C) 2003,2004 Eric Biederman (ebiederm@xmission.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation (version 2 of the License). + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#if 1 +#define TTYS0_BASE 0x3f8 +#define TTYS0_RBR (TTYS0_BASE+0x00) +#define TTYS0_TBR TTYS0_RBR +#define TTYS0_LSR (TTYS0_BASE+0x05) + + + /* uses: ax, dx */ +#define TTYS0_TX_AL \ + mov %al, %ah ; \ +9: mov $TTYS0_LSR, %dx ; \ + inb %dx, %al ; \ + test $0x20, %al ; \ + je 9b ; \ + mov $TTYS0_TBR, %dx ; \ + mov %ah, %al ; \ + outb %al, %dx ; \ +9: mov $TTYS0_LSR, %dx ; \ + inb %dx, %al ; \ + test $0x40, %al ; \ + jz 9b + + + + /* uses: ax, dx */ +#define TTYS0_TX_CHAR(byte) \ + mov byte, %al ; \ + TTYS0_TX_AL + + /* uses: ax, dx */ +#define TTYS0_TX_HEX32(lword) \ + mov lword, %eax ; \ + shr $28, %eax ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %eax ; \ + shr $24, %eax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %eax ; \ + shr $20, %eax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %eax ; \ + shr $16, %eax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %eax ; \ + shr $12, %eax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %eax ; \ + shr $8, %eax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %eax ; \ + shr $4, %eax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %eax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL + + +#define DEBUG(x) TTYS0_TX_CHAR($x) ; TTYS0_TX_CHAR($'\r') ; TTYS0_TX_CHAR($'\n') +#define DEBUG_TX_HEX32(x) TTYS0_TX_HEX32(x) ; TTYS0_TX_CHAR($'\r') ; TTYS0_TX_CHAR($'\n') +#else +#define DEBUG(x) +#define DEBUG_TX_HEX32(x) +#endif + +.data + .globl setup16_debug_start, setup16_debug_end, setup16_debug_size, setup16_debug_align + .globl setup16_debug_regs + .globl setup16_debug_kernel_pre_protected + .globl setup16_debug_first_code32 + .globl setup16_debug_old_code32 +setup16_debug_start: +_reloc = . + .balign 16 + .code32 +DEBUG('a') + /* Compute where I am running at */ + call 1f +1: popl %ebx + subl $(1b - _reloc), %ebx + + /* Remember where I am running at */ + movl %ebx, location - _reloc(%ebx) + +DEBUG('b') + /* Fixup my real mode segment */ + movl %ebx, %eax + shrl $4, %eax + movw %ax, 2 + realptr - _reloc(%ebx) + +DEBUG('c') + /* Fixup the gdt */ + movl %ebx, %eax + shll $16, %eax + + movl %ebx, %ecx + shrl $16, %ecx + andl $0xff, %ecx + + movl %ebx, %edx + andl $0xff000000, %edx + orl %edx, %ecx + + addl %ebx, gdtaddr - _reloc(%ebx) + addl %ebx, debug_gdtaddr - _reloc(%ebx) + orl %eax, 0x08 + gdt - _reloc(%ebx) + orl %ecx, 0x0c + gdt - _reloc(%ebx) + orl %eax, 0x10 + gdt - _reloc(%ebx) + orl %ecx, 0x14 + gdt - _reloc(%ebx) + + + +DEBUG('d') + /* Setup the classic BIOS interrupt table at 0x0 */ + lidt idtptr - _reloc(%ebx) + + /* Provide us with 16bit segments that we can use */ + lgdt gdtptr - _reloc(%ebx) + + /* Note we don't disable the a20 line, (this shouldn't be required) + * The code to do it is in kexec_test and it is a real pain. + * I will worry about that when I need it. + */ + + /* Load 16bit data segments, to ensure the segment limits are set */ + movl $0x10, %eax + movl %eax, %ds + movl %eax, %es + movl %eax, %ss + movl %eax, %fs + movl %eax, %gs + + /* switch to 16bit mode */ + + ljmp $0x08, $2f - _reloc +2: + .code16 +DEBUG('e') + /* Disable Paging and protected mode */ + /* clear the PG & PE bits of CR0 */ + movl %cr0,%eax + andl $~((1 << 31)|(1<<0)),%eax + movl %eax,%cr0 + +DEBUG('f') + /* make intersegment jmp to flush the processor pipeline + * and reload %cs:%eip (to clear upper 16 bits of %eip). + */ + ljmp *(realptr - _reloc) +3: +DEBUG('g') + /* we are in real mode now + * set up the real mode segment registers : %ds, $ss, %es + */ + /* Setup the data segment */ + movw %cs, %ax + movw %ax, %ds + +DEBUG('h') + /* Load the registers */ + movl eax - _reloc, %eax + movl ebx - _reloc, %ebx + movl ecx - _reloc, %ecx + movl edx - _reloc, %edx + movl esi - _reloc, %esi + movl edi - _reloc, %esi + movl esp - _reloc, %esp + movl ebp - _reloc, %ebp + movw es - _reloc, %es + movw ss - _reloc, %ss + movw fs - _reloc, %fs + movw gs - _reloc, %gs + movw ds - _reloc, %ds + + /* Jump to the kernel entrypoint */ + ljmp %cs:*(realdest - _reloc) + +setup16_debug_regs: +eax: .long 0x00000000 +ebx: .long 0x00000000 +ecx: .long 0x00000000 +edx: .long 0x00000000 +esi: .long 0x00000000 +edi: .long 0x00000000 +esp: .long 0x00000000 +ebp: .long 0x00000000 +ds: .word 0x0000 +es: .word 0x0000 +ss: .word 0x0000 +fs: .word 0x0000 +gs: .word 0x0000 +realdest: +ip: .word 0x0000 +cs: .word 0x0000 + + .balign 16 +realptr: + .word 3b - _reloc + .word 0x0000 + +idtptr: + /* 256 entry idt at 0 */ + .word 0x400 - 1 + .word 0, 0 + +gdtptr: + .word gdt_end - gdt - 1 +gdtaddr: + .long gdt - _reloc + +gdt: + /* dummy */ + .word 0, 0, 0, 0 + + /* 16 bit real mode code segment */ + .word 0xffff, 0x0000 + .byte 0x00, 0x9b, 0x00, 0x00 + + /* 16 bit real mode data segment */ + .word 0xffff, 0x0000 + .byte 0x00, 0x93, 0x00, 0x00 +gdt_end: + +debug_gdt: + /* 0x00 */ + .word debug_gdt_end - debug_gdt - 1 +debug_gdtaddr: + .long debug_gdt - _reloc + .word 0 + + /* 0x08 */ + .word 0, 0, 0, 0 /* Nothing in the first gdt entry */ + + /* 0x10 4Gb - (0x100000*0x1000 = 4Gb), base address = 0, code read/exec, granularity = 4096, 386 */ + .word 0xFFFF, 0x00, 0x9A00, 0x00CF + /* 0x18 4Gb - (0x100000*0x1000 = 4Gb*), base address = 0, data read/write, granularity = 4096, 386 */ + .word 0xFFFF, 0x0000, 0x9200, 0x00CF + + + /* 0x20 4Gb - (0x100000*0x1000 = 4Gb), base address = 0, code read/exec, granularity = 4096, 386 */ + .word 0xFFFF, 0x00, 0x9A00, 0x00CF + /* 0x28 4Gb - (0x100000*0x1000 = 4Gb*), base address = 0, data read/write, granularity = 4096, 386 */ + .word 0xFFFF, 0x0000, 0x9200, 0x00CF + + + /* 0x30 4Gb - (0x100000*0x1000 = 4Gb), base address = 0, code read/exec, granularity = 4096, 386 */ + .word 0xFFFF, 0x00, 0x9A00, 0x00CF + /* 0x38 4Gb - (0x100000*0x1000 = 4Gb*), base address = 0, data read/write, granularity = 4096, 386 */ + .word 0xFFFF, 0x0000, 0x9200, 0x00CF + + + /* 0x40 4Gb - (0x100000*0x1000 = 4Gb), base address = 0, code read/exec, granularity = 4096, 386 */ + .word 0xFFFF, 0x00, 0x9A00, 0x00CF + /* 0x48 4Gb - (0x100000*0x1000 = 4Gb*), base address = 0, data read/write, granularity = 4096, 386 */ + .word 0xFFFF, 0x0000, 0x9200, 0x00CF + + + /* 0x50 4Gb - (0x100000*0x1000 = 4Gb), base address = 0, code read/exec, granularity = 4096, 386 */ + .word 0xFFFF, 0x00, 0x9A00, 0x00CF + /* 0x58 4Gb - (0x100000*0x1000 = 4Gb*), base address = 0, data read/write, granularity = 4096, 386 */ + .word 0xFFFF, 0x0000, 0x9200, 0x00CF + + + /* 0x60 4Gb - (0x100000*0x1000 = 4Gb), base address = 0, code read/exec, granularity = 4096, 386 */ + .word 0xFFFF, 0x00, 0x9A00, 0x00CF + /* 0x68 4Gb - (0x100000*0x1000 = 4Gb*), base address = 0, data read/write, granularity = 4096, 386 */ + .word 0xFFFF, 0x0000, 0x9200, 0x00CF +debug_gdt_end: + + +setup16_debug_kernel_pre_protected: + .code16 + DEBUG('i') + cli # no interrupts allowed ! + movb $0x80, %al # disable NMI for bootup + # sequence + outb %al, $0x70 + lret +setup16_debug_first_code32: + .code32 + .byte 0xbf /* movl $0x12345678, %edi */ +location: + .long 0x12345678 + DEBUG('j') + .byte 0xb8 /* movl $0x10000, %eax */ +setup16_debug_old_code32: + .long 0x10000 + jmp %eax +setup16_debug_end: +setup16_debug_size: + .long setup16_debug_end - setup16_debug_start +setup16_debug_align: + .long 16 diff --git a/purgatory/arch/i386/pic.c b/purgatory/arch/i386/pic.c new file mode 100644 index 0000000..1b73ea9 --- /dev/null +++ b/purgatory/arch/i386/pic.c @@ -0,0 +1,51 @@ +/* + * kexec: Linux boots Linux + * + * Copyright (C) 2003,2004 Eric Biederman (ebiederm@xmission.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation (version 2 of the License). + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ +#include <arch/io.h> +#include <purgatory.h> +#include "purgatory-x86.h" + + +void x86_setup_legacy_pic(void) +{ + /* Load the legacy dos settings into the 8259A pic */ + outb(0xff, 0x21); /* mask all of 8259A-1 */ + outb(0xff, 0xa1); /* mask all of 8259A-2 */ + + outb(0x11, 0x20); /* ICW1: select 8259A-1 init */ + outb(0x11, 0x80); /* A short delay */ + + outb(0x08, 0x21); /* ICW2: 8259A-1 IR0-7 mappend to 0x8-0xf */ + outb(0x08, 0x80); /* A short delay */ + + outb(0x01, 0x21); /* Normal 8086 auto EOI mode */ + outb(0x01, 0x80); /* A short delay */ + + outb(0x11, 0xa0); /* ICW1: select 8259A-2 init */ + outb(0x11, 0x80); /* A short delay */ + + outb(0x70, 0xa1); /* ICW2: 8259A-2 IR0-7 mappend to 0x70-0x77 */ + outb(0x70, 0x80); /* A short delay */ + + outb(0x01, 0xa1); /* Normal 8086 auto EOI mode */ + outb(0x01, 0x80); /* A short delay */ + + outb(0x00, 0x21); /* Unmask all of 8259A-1 */ + outb(0x00, 0xa1); /* Unmask all of 8259A-2 */ +} + diff --git a/purgatory/arch/i386/purgatory-x86.c b/purgatory/arch/i386/purgatory-x86.c new file mode 100644 index 0000000..442358a --- /dev/null +++ b/purgatory/arch/i386/purgatory-x86.c @@ -0,0 +1,40 @@ +#include <arch/io.h> +#include <purgatory.h> +#include "purgatory-x86.h" + +/* + * CPU + * ============================================================================= + */ + +void x86_setup_cpu(void) +{ +#if 0 + /* This code is only needed for old versions of the kexec kernel patch. + * While it is still a good idea doing this unconditionally breaks + * on older cpus that did not implemented cr4. + * So this code is disabled for now. If this is revisited + * I first need to detect cpuid support and then use cpuid + * to conditionally change newer cpu registers. + */ + /* clear special bits in %cr4 */ + asm volatile( + "movl %0, %%eax\n\t" + "movl %%eax, %%cr4\n\t" + : /* outputs */ + : "r" (0) + ); +#endif +} + +uint8_t reset_vga = 0; +uint8_t legacy_timer = 0; +uint8_t legacy_pic = 0; + +void setup_arch(void) +{ + x86_setup_cpu(); + if (reset_vga) x86_reset_vga(); + if (legacy_pic) x86_setup_legacy_pic(); + /* if (legacy_timer) x86_setup_legacy_timer(); */ +} diff --git a/purgatory/arch/i386/purgatory-x86.h b/purgatory/arch/i386/purgatory-x86.h new file mode 100644 index 0000000..4178b37 --- /dev/null +++ b/purgatory/arch/i386/purgatory-x86.h @@ -0,0 +1,8 @@ +#ifndef PURGATORY_X86_H +#define PURGATORY_X86_H + +void x86_reset_vga(void); +void x86_setup_legacy_pic(void); +void x86_setup_legacy_timer(void); + +#endif /* PURGATORY_X86_H */ diff --git a/purgatory/arch/i386/setup-x86.S b/purgatory/arch/i386/setup-x86.S new file mode 100644 index 0000000..f0719d4 --- /dev/null +++ b/purgatory/arch/i386/setup-x86.S @@ -0,0 +1,72 @@ +/* + * purgatory: setup code + * + * Copyright (C) 2003,2004 Eric Biederman (ebiederm@xmission.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation (version 2 of the License). + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + + +#undef i386 + + .text + .arch i386 + .globl purgatory_start +purgatory_start: + .code32 + + /* Load a gdt so I know what the segment registers are */ + lgdt %cs:gdt + + /* load the data segments */ + movl $0x08, %eax /* data segment */ + movl %eax, %ds + movl %eax, %es + movl %eax, %ss + movl %eax, %fs + movl %eax, %gs + + /* load the code segment */ + ljmp $0x10,$1f +1: + + /* Setup a stack */ + movl $lstack_end, %esp + + /* Call the C code */ + call purgatory + jmp entry32 + + .section ".rodata" + .balign 16 +gdt: + /* 0x00 unusable segment so used as the gdt ptr */ + .word gdt_end - gdt - 1 + .long gdt + .word 0 + + /* 0x8 4GB flat data segment */ + .word 0xFFFF, 0x0000, 0x9200, 0x00CF + + /* 0x10 4GB flat code segment */ + .word 0xFFFF, 0x0000, 0x9A00, 0x00CF +gdt_end: + + /* A stack for the purgatory code */ + .bss + .balign 4096 +lstack: + .skip 4096 +lstack_end: + diff --git a/purgatory/arch/i386/stack.S b/purgatory/arch/i386/stack.S new file mode 100644 index 0000000..a597b0f --- /dev/null +++ b/purgatory/arch/i386/stack.S @@ -0,0 +1,39 @@ +/* + * purgatory: stack + * + * Copyright (C) 2003,2004 Eric Biederman (ebiederm@xmission.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation (version 2 of the License). + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + + /* A stack for the loaded kernel. + * Seperate and in the data section so it can be prepopulated. + */ + .data + .globl stack, stack_end + .globl stack_arg32_1, stack_arg32_2, stack_arg32_3 ,stack_arg32_4 + .globl stack_arg32_5, stack_arg32_6, stack_arg32_7 ,stack_arg32_8 + .balign 4096 +stack: + .skip 4096 - (8*4) +stack_arg32_8: .long 0 ; .size stack_arg32_8, 4 +stack_arg32_7: .long 0 ; .size stack_arg32_7, 4 +stack_arg32_6: .long 0 ; .size stack_arg32_6, 4 +stack_arg32_5: .long 0 ; .size stack_arg32_5, 4 +stack_arg32_4: .long 0 ; .size stack_arg32_4, 4 +stack_arg32_3: .long 0 ; .size stack_arg32_3, 4 +stack_arg32_2: .long 0 ; .size stack_arg32_2, 4 +stack_arg32_1: .long 0 ; .size stack_arg32_1, 4 +stack_end: + diff --git a/purgatory/arch/i386/timer.c b/purgatory/arch/i386/timer.c new file mode 100644 index 0000000..dec5938 --- /dev/null +++ b/purgatory/arch/i386/timer.c @@ -0,0 +1,10 @@ +#include <arch/io.h> +#include <purgatory.h> +#include "purgatory-x86.h" + + +void x86_setup_legacy_timer(void) +{ + /* Load the legacy timer settings into the 8254 pit */ +} + diff --git a/purgatory/arch/i386/vga.c b/purgatory/arch/i386/vga.c new file mode 100644 index 0000000..effa8ff --- /dev/null +++ b/purgatory/arch/i386/vga.c @@ -0,0 +1,152 @@ +#include <arch/io.h> +#include <purgatory.h> +#include "purgatory-x86.h" + +/* Crudely reset a VGA card to text mode 3, by writing plausible default */ +/* values into its registers. */ +/* Tim Deegan (tjd21 at cl.cam.ac.uk), March 2003 */ +/* Based on Keir Fraser's start-of-day reset code from the Xen hypervisor */ +/* Converted from Assembly 20 December 2004 -- Eric Biederman */ + +void x86_reset_vga(void) +{ + /* Hello */ + inb(0x3da); + outb(0, 0x3c0); + + /* Sequencer registers */ + outw(0x0300, 0x3c4); + outw(0x0001, 0x3c4); + outw(0x0302, 0x3c4); + outw(0x0003, 0x3c4); + outw(0x0204, 0x3c4); + + /* Ensure CRTC regs 0-7 are unlocked by clearing bit 7 of CRTC[17] */ + outw(0x0e11, 0x3d4); + /* CRTC registers */ + outw(0x5f00, 0x3d4); + outw(0x4f01, 0x3d4); + outw(0x5002, 0x3d4); + outw(0x8203, 0x3d4); + outw(0x5504, 0x3d4); + outw(0x8105, 0x3d4); + outw(0xbf06, 0x3d4); + outw(0x1f07, 0x3d4); + outw(0x0008, 0x3d4); + outw(0x4f09, 0x3d4); + outw(0x200a, 0x3d4); + outw(0x0e0b, 0x3d4); + outw(0x000c, 0x3d4); + outw(0x000d, 0x3d4); + outw(0x010e, 0x3d4); + outw(0xe00f, 0x3d4); + outw(0x9c10, 0x3d4); + outw(0x8e11, 0x3d4); + outw(0x8f12, 0x3d4); + outw(0x2813, 0x3d4); + outw(0x1f14, 0x3d4); + outw(0x9615, 0x3d4); + outw(0xb916, 0x3d4); + outw(0xa317, 0x3d4); + outw(0xff18, 0x3d4); + + /* Graphic registers */ + outw(0x0000, 0x3ce); + outw(0x0001, 0x3ce); + outw(0x0002, 0x3ce); + outw(0x0003, 0x3ce); + outw(0x0004, 0x3ce); + outw(0x1005, 0x3ce); + outw(0x0e06, 0x3ce); + outw(0x0007, 0x3ce); + outw(0xff08, 0x3ce); + + /* Attribute registers */ + inb(0x3da); + outb(0x00, 0x3c0); + outb(0x00, 0x3c0); + + inb(0x3da); + outb(0x01, 0x3c0); + outb(0x01, 0x3c0); + + inb(0x3da); + outb(0x02, 0x3c0); + outb(0x02, 0x3c0); + + inb(0x3da); + outb(0x03, 0x3c0); + outb(0x03, 0x3c0); + + inb(0x3da); + outb(0x04, 0x3c0); + outb(0x04, 0x3c0); + + inb(0x3da); + outb(0x05, 0x3c0); + outb(0x05, 0x3c0); + + inb(0x3da); + outb(0x06, 0x3c0); + outb(0x14, 0x3c0); + + inb(0x3da); + outb(0x07, 0x3c0); + outb(0x07, 0x3c0); + + inb(0x3da); + outb(0x08, 0x3c0); + outb(0x38, 0x3c0); + + inb(0x3da); + outb(0x09, 0x3c0); + outb(0x39, 0x3c0); + + inb(0x3da); + outb(0x0a, 0x3c0); + outb(0x3a, 0x3c0); + + inb(0x3da); + outb(0x0b, 0x3c0); + outb(0x3b, 0x3c0); + + inb(0x3da); + outb(0x0c, 0x3c0); + outb(0x3c, 0x3c0); + + inb(0x3da); + outb(0x0d, 0x3c0); + outb(0x3d, 0x3c0); + + inb(0x3da); + outb(0x0e, 0x3c0); + outb(0x3e, 0x3c0); + + inb(0x3da); + outb(0x0f, 0x3c0); + outb(0x3f, 0x3c0); + + inb(0x3da); + outb(0x10, 0x3c0); + outb(0x0c, 0x3c0); + + inb(0x3da); + outb(0x11, 0x3c0); + outb(0x00, 0x3c0); + + inb(0x3da); + outb(0x12, 0x3c0); + outb(0x0f, 0x3c0); + + inb(0x3da); + outb(0x13, 0x3c0); + outb(0x08, 0x3c0); + + inb(0x3da); + outb(0x14, 0x3c0); + outb(0x00, 0x3c0); + + /* Goodbye */ + inb(0x3da); + outb(0x20, 0x3c0); +} diff --git a/purgatory/arch/ia64/Makefile b/purgatory/arch/ia64/Makefile new file mode 100644 index 0000000..8ba596e --- /dev/null +++ b/purgatory/arch/ia64/Makefile @@ -0,0 +1,9 @@ +# +# Purgatory ia64 +# + +PURGATORY_S_SRCS+= +PURGATORY_C_SRCS+= purgatory/arch/ia64/purgatory-ia64.c +PURGATORY_C_SRCS+= purgatory/arch/ia64/console-ia64.c +PURGATORY_C_SRCS+= + diff --git a/purgatory/arch/ia64/console-ia64.c b/purgatory/arch/ia64/console-ia64.c new file mode 100644 index 0000000..389b7be --- /dev/null +++ b/purgatory/arch/ia64/console-ia64.c @@ -0,0 +1,5 @@ +#include <purgatory.h> +void putchar(int ch) +{ + /* Nothing for now */ +} diff --git a/purgatory/arch/ia64/include/limits.h b/purgatory/arch/ia64/include/limits.h new file mode 100644 index 0000000..0c6f21f --- /dev/null +++ b/purgatory/arch/ia64/include/limits.h @@ -0,0 +1,57 @@ +#ifndef LIMITS_H +#define LIMITS_H 1 + +/* Number of bits in a `char' */ +#define CHAR_BIT 8 + +/* Minimum and maximum values a `signed char' can hold */ +#define SCHAR_MIN (-128) +#define SCHAR_MAX 127 + +/* Maximum value an `unsigned char' can hold. (Minimum is 0.) */ +#define UCHAR_MAX 255 + +/* Minimum and maximum values a `char' can hold */ +#define CHAR_MIN SCHAR_MIN +#define CHAR_MAX SCHAR_MAX + +/* Minimum and maximum values a `signed short int' can hold */ +#define SHRT_MIN (-32768) +#define SHRT_MAX 32767 + +/* Maximum value an `unsigned short' can hold. (Minimum is 0.) */ +#define USHRT_MAX 65535 + + +/* Minimum and maximum values a `signed int' can hold */ +#define INT_MIN (-INT_MAX - 1) +#define INT_MAX 2147483647 + +/* Maximum value an `unsigned int' can hold. (Minimum is 0.) */ +#define UINT_MAX 4294967295U + + +/* Minimum and maximum values a `signed int' can hold */ +#define INT_MIN (-INT_MAX - 1) +#define INT_MAX 2147483647 + +/* Maximum value an `unsigned int' can hold. (Minimum is 0.) */ +#define UINT_MAX 4294967295U + +/* Minimum and maximum values a `signed long' can hold */ +#define LONG_MAX 9223372036854775807L +#define LONG_MIN (-LONG_MAX - 1L) + +/* Maximum value an `unsigned long' can hold. (Minimum is 0.) */ +#define ULONG_MAX 18446744073709551615UL + +/* Minimum and maximum values a `signed long long' can hold */ +#define LLONG_MAX 9223372036854775807LL +#define LLONG_MIN (-LONG_MAX - 1LL) + + +/* Maximum value an `unsigned long long' can hold. (Minimum is 0.) */ +#define ULLONG_MAX 18446744073709551615ULL + + +#endif /* LIMITS_H */ diff --git a/purgatory/arch/ia64/include/stdint.h b/purgatory/arch/ia64/include/stdint.h new file mode 100644 index 0000000..2f9c592 --- /dev/null +++ b/purgatory/arch/ia64/include/stdint.h @@ -0,0 +1,16 @@ +#ifndef STDINT_H +#define STDINT_H + +typedef unsigned long size_t; + +typedef unsigned char uint8_t; +typedef unsigned short uint16_t; +typedef unsigned int uint32_t; +typedef unsigned long uint64_t; + +typedef signed char int8_t; +typedef signed short int16_t; +typedef signed int int32_t; +typedef signed long int64_t; + +#endif /* STDINT_H */ diff --git a/purgatory/arch/ia64/purgatory-ia64.c b/purgatory/arch/ia64/purgatory-ia64.c new file mode 100644 index 0000000..c10cbea --- /dev/null +++ b/purgatory/arch/ia64/purgatory-ia64.c @@ -0,0 +1,7 @@ +#include <purgatory.h> +#include "purgatory-ia64.h" + +void setup_arch(void) +{ + /* Nothing for now */ +} diff --git a/purgatory/arch/ia64/purgatory-ia64.h b/purgatory/arch/ia64/purgatory-ia64.h new file mode 100644 index 0000000..773e3c0 --- /dev/null +++ b/purgatory/arch/ia64/purgatory-ia64.h @@ -0,0 +1,6 @@ +#ifndef PURGATORY_IA64_H +#define PURGATORY_IA64_H + +/* nothing yet */ + +#endif /* PURGATORY_IA64_H */ diff --git a/purgatory/arch/ppc/Makefile b/purgatory/arch/ppc/Makefile new file mode 100644 index 0000000..4ce40fe --- /dev/null +++ b/purgatory/arch/ppc/Makefile @@ -0,0 +1,8 @@ +# +# Purgatory ppc +# + +PURGATORY_S_SRCS+= purgatory/arch/ppc/misc.S +PURGATORY_C_SRCS+= purgatory/arch/ppc/purgatory-ppc.c +PURGATORY_C_SRCS+= purgatory/arch/ppc/console-ppc.c + diff --git a/purgatory/arch/ppc/console-ppc.c b/purgatory/arch/ppc/console-ppc.c new file mode 100644 index 0000000..389b7be --- /dev/null +++ b/purgatory/arch/ppc/console-ppc.c @@ -0,0 +1,5 @@ +#include <purgatory.h> +void putchar(int ch) +{ + /* Nothing for now */ +} diff --git a/purgatory/arch/ppc/include/limits.h b/purgatory/arch/ppc/include/limits.h new file mode 100644 index 0000000..d5a5a02 --- /dev/null +++ b/purgatory/arch/ppc/include/limits.h @@ -0,0 +1,58 @@ +#ifndef LIMITS_H +#define LIMITS_H 1 + + +/* Number of bits in a `char' */ +#define CHAR_BIT 8 + +/* Minimum and maximum values a `signed char' can hold */ +#define SCHAR_MIN (-128) +#define SCHAR_MAX 127 + +/* Maximum value an `unsigned char' can hold. (Minimum is 0.) */ +#define UCHAR_MAX 255 + +/* Minimum and maximum values a `char' can hold */ +#define CHAR_MIN SCHAR_MIN +#define CHAR_MAX SCHAR_MAX + +/* Minimum and maximum values a `signed short int' can hold */ +#define SHRT_MIN (-32768) +#define SHRT_MAX 32767 + +/* Maximum value an `unsigned short' can hold. (Minimum is 0.) */ +#define USHRT_MAX 65535 + + +/* Minimum and maximum values a `signed int' can hold */ +#define INT_MIN (-INT_MAX - 1) +#define INT_MAX 2147483647 + +/* Maximum value an `unsigned int' can hold. (Minimum is 0.) */ +#define UINT_MAX 4294967295U + + +/* Minimum and maximum values a `signed int' can hold */ +#define INT_MIN (-INT_MAX - 1) +#define INT_MAX 2147483647 + +/* Maximum value an `unsigned int' can hold. (Minimum is 0.) */ +#define UINT_MAX 4294967295U + +/* Minimum and maximum values a `signed long' can hold */ +#define LONG_MAX 2147483647L +#define LONG_MIN (-LONG_MAX - 1L) + +/* Maximum value an `unsigned long' can hold. (Minimum is 0.) */ +#define ULONG_MAX 4294967295UL + +/* Minimum and maximum values a `signed long long' can hold */ +#define LLONG_MAX 9223372036854775807LL +#define LLONG_MIN (-LONG_MAX - 1LL) + + +/* Maximum value an `unsigned long long' can hold. (Minimum is 0.) */ +#define ULLONG_MAX 18446744073709551615ULL + + +#endif /* LIMITS_H */ diff --git a/purgatory/arch/ppc/include/stdint.h b/purgatory/arch/ppc/include/stdint.h new file mode 100644 index 0000000..79262c2 --- /dev/null +++ b/purgatory/arch/ppc/include/stdint.h @@ -0,0 +1,16 @@ +#ifndef STDINT_H +#define STDINT_H + +typedef unsigned long size_t; + +typedef unsigned char uint8_t; +typedef unsigned short uint16_t; +typedef unsigned int uint32_t; +typedef unsigned long long uint64_t; + +typedef signed char int8_t; +typedef signed short int16_t; +typedef signed int int32_t; +typedef signed long long int64_t; + +#endif /* STDINT_H */ diff --git a/purgatory/arch/ppc/misc.S b/purgatory/arch/ppc/misc.S new file mode 100644 index 0000000..b0a5486 --- /dev/null +++ b/purgatory/arch/ppc/misc.S @@ -0,0 +1,72 @@ +/* + * This file contains miscellaneous low-level functions. + * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) + * + * Largely rewritten by Cort Dougan (cort@cs.nmt.edu) + * and Paul Mackerras. + * + * Rewrittten to work with /sbin/kexec 20 December 2004 Eric Biederman + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + */ + +#include "ppc_asm.h" + + .text + +/* + * Extended precision shifts. + * + * Updated to be valid for shift counts from 0 to 63 inclusive. + * -- Gabriel + * + * R3/R4 has 64 bit value + * R5 has shift count + * result in R3/R4 + * + * ashrdi3: arithmetic right shift (sign propagation) + * lshrdi3: logical right shift + * ashldi3: left shift + */ + .globl __ashrdi3 +__ashrdi3: + subfic r6,r5,32 + srw r4,r4,r5 # LSW = count > 31 ? 0 : LSW >> count + addi r7,r5,32 # could be xori, or addi with -32 + slw r6,r3,r6 # t1 = count > 31 ? 0 : MSW << (32-count) + rlwinm r8,r7,0,32 # t3 = (count < 32) ? 32 : 0 + sraw r7,r3,r7 # t2 = MSW >> (count-32) + or r4,r4,r6 # LSW |= t1 + slw r7,r7,r8 # t2 = (count < 32) ? 0 : t2 + sraw r3,r3,r5 # MSW = MSW >> count + or r4,r4,r7 # LSW |= t2 + blr + + .globl __ashldi3 +__ashldi3: + subfic r6,r5,32 + slw r3,r3,r5 # MSW = count > 31 ? 0 : MSW << count + addi r7,r5,32 # could be xori, or addi with -32 + srw r6,r4,r6 # t1 = count > 31 ? 0 : LSW >> (32-count) + slw r7,r4,r7 # t2 = count < 32 ? 0 : LSW << (count-32) + or r3,r3,r6 # MSW |= t1 + slw r4,r4,r5 # LSW = LSW << count + or r3,r3,r7 # MSW |= t2 + blr + + .globl __lshrdi3 +__lshrdi3: + subfic r6,r5,32 + srw r4,r4,r5 # LSW = count > 31 ? 0 : LSW >> count + addi r7,r5,32 # could be xori, or addi with -32 + slw r6,r3,r6 # t1 = count > 31 ? 0 : MSW << (32-count) + srw r7,r3,r7 # t2 = count < 32 ? 0 : MSW >> (count-32) + or r4,r4,r6 # LSW |= t1 + srw r3,r3,r5 # MSW = MSW >> count + or r4,r4,r7 # LSW |= t2 + blr + diff --git a/purgatory/arch/ppc/ppc_asm.h b/purgatory/arch/ppc/ppc_asm.h new file mode 100644 index 0000000..36503a9 --- /dev/null +++ b/purgatory/arch/ppc/ppc_asm.h @@ -0,0 +1,506 @@ +/* + * ppc_asm.h - mainly bits stolen from Linux kernel asm/reg.h and asm/ppc_asm.h + * + * This source code is licensed under the GNU General Public License, + * Version 2. See the file COPYING for more details. + */ + +/* Condition Register Bit Fields */ + +#define cr0 0 +#define cr1 1 +#define cr2 2 +#define cr3 3 +#define cr4 4 +#define cr5 5 +#define cr6 6 +#define cr7 7 + + +/* General Purpose Registers (GPRs) */ + +#define r0 0 +#define r1 1 +#define r2 2 +#define r3 3 +#define r4 4 +#define r5 5 +#define r6 6 +#define r7 7 +#define r8 8 +#define r9 9 +#define r10 10 +#define r11 11 +#define r12 12 +#define r13 13 +#define r14 14 +#define r15 15 +#define r16 16 +#define r17 17 +#define r18 18 +#define r19 19 +#define r20 20 +#define r21 21 +#define r22 22 +#define r23 23 +#define r24 24 +#define r25 25 +#define r26 26 +#define r27 27 +#define r28 28 +#define r29 29 +#define r30 30 +#define r31 31 + +/* Machine State Register (MSR) Fields */ +#define MSR_SF (1<<63) +#define MSR_ISF (1<<61) +#define MSR_VEC (1<<25) /* Enable AltiVec */ +#define MSR_POW (1<<18) /* Enable Power Management */ +#define MSR_WE (1<<18) /* Wait State Enable */ +#define MSR_TGPR (1<<17) /* TLB Update registers in use */ +#define MSR_CE (1<<17) /* Critical Interrupt Enable */ +#define MSR_ILE (1<<16) /* Interrupt Little Endian */ +#define MSR_EE (1<<15) /* External Interrupt Enable */ +#define MSR_PR (1<<14) /* Problem State / Privilege Level */ +#define MSR_FP (1<<13) /* Floating Point enable */ +#define MSR_ME (1<<12) /* Machine Check Enable */ +#define MSR_FE0 (1<<11) /* Floating Exception mode 0 */ +#define MSR_SE (1<<10) /* Single Step */ +#define MSR_BE (1<<9) /* Branch Trace */ +#define MSR_DE (1<<9) /* Debug Exception Enable */ +#define MSR_FE1 (1<<8) /* Floating Exception mode 1 */ +#define MSR_IP (1<<6) /* Exception prefix 0x000/0xFFF */ +#define MSR_IR (1<<5) /* Instruction Relocate */ +#define MSR_DR (1<<4) /* Data Relocate */ +#define MSR_PE (1<<3) /* Protection Enable */ +#define MSR_PX (1<<2) /* Protection Exclusive Mode */ +#define MSR_RI (1<<1) /* Recoverable Exception */ +#define MSR_LE (1<<0) /* Little Endian */ + +/* Special Purpose Registers (SPRNs)*/ +#define SPRN_CTR 0x009 /* Count Register */ +#define SPRN_DABR 0x3F5 /* Data Address Breakpoint Register */ +#define SPRN_DAR 0x013 /* Data Address Register */ +#define SPRN_TBRL 0x10C /* Time Base Read Lower Register (user, R/O) */ +#define SPRN_TBRU 0x10D /* Time Base Read Upper Register (user, R/O) */ +#define SPRN_TBWL 0x11C /* Time Base Lower Register (super, R/W) */ +#define SPRN_TBWU 0x11D /* Time Base Upper Register (super, R/W) */ +#define SPRN_HIOR 0x137 /* 970 Hypervisor interrupt offset */ +#define SPRN_DBAT0L 0x219 /* Data BAT 0 Lower Register */ +#define SPRN_DBAT0U 0x218 /* Data BAT 0 Upper Register */ +#define SPRN_DBAT1L 0x21B /* Data BAT 1 Lower Register */ +#define SPRN_DBAT1U 0x21A /* Data BAT 1 Upper Register */ +#define SPRN_DBAT2L 0x21D /* Data BAT 2 Lower Register */ +#define SPRN_DBAT2U 0x21C /* Data BAT 2 Upper Register */ +#define SPRN_DBAT3L 0x21F /* Data BAT 3 Lower Register */ +#define SPRN_DBAT3U 0x21E /* Data BAT 3 Upper Register */ +#define SPRN_DBAT4L 0x239 /* Data BAT 4 Lower Register */ +#define SPRN_DBAT4U 0x238 /* Data BAT 4 Upper Register */ +#define SPRN_DBAT5L 0x23B /* Data BAT 5 Lower Register */ +#define SPRN_DBAT5U 0x23A /* Data BAT 5 Upper Register */ +#define SPRN_DBAT6L 0x23D /* Data BAT 6 Lower Register */ +#define SPRN_DBAT6U 0x23C /* Data BAT 6 Upper Register */ +#define SPRN_DBAT7L 0x23F /* Data BAT 7 Lower Register */ +#define SPRN_DBAT7U 0x23E /* Data BAT 7 Upper Register */ + +#define SPRN_DEC 0x016 /* Decrement Register */ +#define SPRN_DER 0x095 /* Debug Enable Regsiter */ +#define DER_RSTE 0x40000000 /* Reset Interrupt */ +#define DER_CHSTPE 0x20000000 /* Check Stop */ +#define DER_MCIE 0x10000000 /* Machine Check Interrupt */ +#define DER_EXTIE 0x02000000 /* External Interrupt */ +#define DER_ALIE 0x01000000 /* Alignment Interrupt */ +#define DER_PRIE 0x00800000 /* Program Interrupt */ +#define DER_FPUVIE 0x00400000 /* FP Unavailable Interrupt */ +#define DER_DECIE 0x00200000 /* Decrementer Interrupt */ +#define DER_SYSIE 0x00040000 /* System Call Interrupt */ +#define DER_TRE 0x00020000 /* Trace Interrupt */ +#define DER_SEIE 0x00004000 /* FP SW Emulation Interrupt */ +#define DER_ITLBMSE 0x00002000 /* Imp. Spec. Instruction TLB Miss */ +#define DER_ITLBERE 0x00001000 /* Imp. Spec. Instruction TLB Error */ +#define DER_DTLBMSE 0x00000800 /* Imp. Spec. Data TLB Miss */ +#define DER_DTLBERE 0x00000400 /* Imp. Spec. Data TLB Error */ +#define DER_LBRKE 0x00000008 /* Load/Store Breakpoint Interrupt */ +#define DER_IBRKE 0x00000004 /* Instruction Breakpoint Interrupt */ +#define DER_EBRKE 0x00000002 /* External Breakpoint Interrupt */ +#define DER_DPIE 0x00000001 /* Dev. Port Nonmaskable Request */ +#define SPRN_DMISS 0x3D0 /* Data TLB Miss Register */ +#define SPRN_DSISR 0x012 /* Data Storage Interrupt Status Register */ +#define SPRN_EAR 0x11A /* External Address Register */ +#define SPRN_HASH1 0x3D2 /* Primary Hash Address Register */ +#define SPRN_HASH2 0x3D3 /* Secondary Hash Address Resgister */ +#define SPRN_HID0 0x3F0 /* Hardware Implementation Register 0 */ +#define HID0_EMCP (1<<31) /* Enable Machine Check pin */ +#define HID0_EBA (1<<29) /* Enable Bus Address Parity */ +#define HID0_EBD (1<<28) /* Enable Bus Data Parity */ +#define HID0_SBCLK (1<<27) +#define HID0_EICE (1<<26) +#define HID0_TBEN (1<<26) /* Timebase enable - 745x */ +#define HID0_ECLK (1<<25) +#define HID0_PAR (1<<24) +#define HID0_STEN (1<<24) /* Software table search enable - 745x */ +#define HID0_HIGH_BAT (1<<23) /* Enable high BATs - 7455 */ +#define HID0_DOZE (1<<23) +#define HID0_NAP (1<<22) +#define HID0_SLEEP (1<<21) +#define HID0_DPM (1<<20) +#define HID0_BHTCLR (1<<18) /* Clear branch history table - 7450 */ +#define HID0_XAEN (1<<17) /* Extended addressing enable - 7450 */ +#define HID0_NHR (1<<16) /* Not hard reset (software bit-7450)*/ +#define HID0_ICE (1<<15) /* Instruction Cache Enable */ +#define HID0_DCE (1<<14) /* Data Cache Enable */ +#define HID0_ILOCK (1<<13) /* Instruction Cache Lock */ +#define HID0_DLOCK (1<<12) /* Data Cache Lock */ +#define HID0_ICFI (1<<11) /* Instr. Cache Flash Invalidate */ +#define HID0_DCI (1<<10) /* Data Cache Invalidate */ +#define HID0_SPD (1<<9) /* Speculative disable */ +#define HID0_SGE (1<<7) /* Store Gathering Enable */ +#define HID0_SIED (1<<7) /* Serial Instr. Execution [Disable] */ +#define HID0_DFCA (1<<6) /* Data Cache Flush Assist */ +#define HID0_LRSTK (1<<4) /* Link register stack - 745x */ +#define HID0_BTIC (1<<5) /* Branch Target Instr Cache Enable */ +#define HID0_ABE (1<<3) /* Address Broadcast Enable */ +#define HID0_FOLD (1<<3) /* Branch Folding enable - 745x */ +#define HID0_BHTE (1<<2) /* Branch History Table Enable */ +#define HID0_BTCD (1<<1) /* Branch target cache disable */ +#define HID0_NOPDST (1<<1) /* No-op dst, dstt, etc. instr. */ +#define HID0_NOPTI (1<<0) /* No-op dcbt and dcbst instr. */ + +#define SPRN_HID1 0x3F1 /* Hardware Implementation Register 1 */ +#define HID1_EMCP (1<<31) /* 7450 Machine Check Pin Enable */ +#define HID1_PC0 (1<<16) /* 7450 PLL_CFG[0] */ +#define HID1_PC1 (1<<15) /* 7450 PLL_CFG[1] */ +#define HID1_PC2 (1<<14) /* 7450 PLL_CFG[2] */ +#define HID1_PC3 (1<<13) /* 7450 PLL_CFG[3] */ +#define HID1_SYNCBE (1<<11) /* 7450 ABE for sync, eieio */ +#define HID1_ABE (1<<10) /* 7450 Address Broadcast Enable */ +#define SPRN_HID2 0x3F8 /* Hardware Implementation Register 2 */ +#define SPRN_IABR 0x3F2 /* Instruction Address Breakpoint Register */ +#define SPRN_HID4 0x3F4 /* 970 HID4 */ +#define SPRN_HID5 0x3F6 /* 970 HID5 */ +#if !defined(SPRN_IAC1) && !defined(SPRN_IAC2) +#define SPRN_IAC1 0x3F4 /* Instruction Address Compare 1 */ +#define SPRN_IAC2 0x3F5 /* Instruction Address Compare 2 */ +#endif +#define SPRN_IBAT0L 0x211 /* Instruction BAT 0 Lower Register */ +#define SPRN_IBAT0U 0x210 /* Instruction BAT 0 Upper Register */ +#define SPRN_IBAT1L 0x213 /* Instruction BAT 1 Lower Register */ +#define SPRN_IBAT1U 0x212 /* Instruction BAT 1 Upper Register */ +#define SPRN_IBAT2L 0x215 /* Instruction BAT 2 Lower Register */ +#define SPRN_IBAT2U 0x214 /* Instruction BAT 2 Upper Register */ +#define SPRN_IBAT3L 0x217 /* Instruction BAT 3 Lower Register */ +#define SPRN_IBAT3U 0x216 /* Instruction BAT 3 Upper Register */ +#define SPRN_IBAT4L 0x231 /* Instruction BAT 4 Lower Register */ +#define SPRN_IBAT4U 0x230 /* Instruction BAT 4 Upper Register */ +#define SPRN_IBAT5L 0x233 /* Instruction BAT 5 Lower Register */ +#define SPRN_IBAT5U 0x232 /* Instruction BAT 5 Upper Register */ +#define SPRN_IBAT6L 0x235 /* Instruction BAT 6 Lower Register */ +#define SPRN_IBAT6U 0x234 /* Instruction BAT 6 Upper Register */ +#define SPRN_IBAT7L 0x237 /* Instruction BAT 7 Lower Register */ +#define SPRN_IBAT7U 0x236 /* Instruction BAT 7 Upper Register */ +#define SPRN_ICMP 0x3D5 /* Instruction TLB Compare Register */ +#define SPRN_ICTC 0x3FB /* Instruction Cache Throttling Control Reg */ +#define SPRN_ICTRL 0x3F3 /* 1011 7450 icache and interrupt ctrl */ +#define ICTRL_EICE 0x08000000 /* enable icache parity errs */ +#define ICTRL_EDC 0x04000000 /* enable dcache parity errs */ +#define ICTRL_EICP 0x00000100 /* enable icache par. check */ +#define SPRN_IMISS 0x3D4 /* Instruction TLB Miss Register */ +#define SPRN_IMMR 0x27E /* Internal Memory Map Register */ +#define SPRN_L2CR 0x3F9 /* Level 2 Cache Control Regsiter */ +#define SPRN_L2CR2 0x3f8 +#define L2CR_L2E 0x80000000 /* L2 enable */ +#define L2CR_L2PE 0x40000000 /* L2 parity enable */ +#define L2CR_L2SIZ_MASK 0x30000000 /* L2 size mask */ +#define L2CR_L2SIZ_256KB 0x10000000 /* L2 size 256KB */ +#define L2CR_L2SIZ_512KB 0x20000000 /* L2 size 512KB */ +#define L2CR_L2SIZ_1MB 0x30000000 /* L2 size 1MB */ +#define L2CR_L2CLK_MASK 0x0e000000 /* L2 clock mask */ +#define L2CR_L2CLK_DISABLED 0x00000000 /* L2 clock disabled */ +#define L2CR_L2CLK_DIV1 0x02000000 /* L2 clock / 1 */ +#define L2CR_L2CLK_DIV1_5 0x04000000 /* L2 clock / 1.5 */ +#define L2CR_L2CLK_DIV2 0x08000000 /* L2 clock / 2 */ +#define L2CR_L2CLK_DIV2_5 0x0a000000 /* L2 clock / 2.5 */ +#define L2CR_L2CLK_DIV3 0x0c000000 /* L2 clock / 3 */ +#define L2CR_L2RAM_MASK 0x01800000 /* L2 RAM type mask */ +#define L2CR_L2RAM_FLOW 0x00000000 /* L2 RAM flow through */ +#define L2CR_L2RAM_PIPE 0x01000000 /* L2 RAM pipelined */ +#define L2CR_L2RAM_PIPE_LW 0x01800000 /* L2 RAM pipelined latewr */ +#define L2CR_L2DO 0x00400000 /* L2 data only */ +#define L2CR_L2I 0x00200000 /* L2 global invalidate */ +#define L2CR_L2CTL 0x00100000 /* L2 RAM control */ +#define L2CR_L2WT 0x00080000 /* L2 write-through */ +#define L2CR_L2TS 0x00040000 /* L2 test support */ +#define L2CR_L2OH_MASK 0x00030000 /* L2 output hold mask */ +#define L2CR_L2OH_0_5 0x00000000 /* L2 output hold 0.5 ns */ +#define L2CR_L2OH_1_0 0x00010000 /* L2 output hold 1.0 ns */ +#define L2CR_L2SL 0x00008000 /* L2 DLL slow */ +#define L2CR_L2DF 0x00004000 /* L2 differential clock */ +#define L2CR_L2BYP 0x00002000 /* L2 DLL bypass */ +#define L2CR_L2IP 0x00000001 /* L2 GI in progress */ +#define SPRN_L3CR 0x3FA /* Level 3 Cache Control Regsiter */ +#define L3CR_L3E 0x80000000 /* L3 enable */ +#define L3CR_L3PE 0x40000000 /* L3 data parity enable */ +#define L3CR_L3APE 0x20000000 /* L3 addr parity enable */ +#define L3CR_L3SIZ 0x10000000 /* L3 size */ +#define L3CR_L3CLKEN 0x08000000 /* L3 clock enable */ +#define L3CR_L3RES 0x04000000 /* L3 special reserved bit */ +#define L3CR_L3CLKDIV 0x03800000 /* L3 clock divisor */ +#define L3CR_L3IO 0x00400000 /* L3 instruction only */ +#define L3CR_L3SPO 0x00040000 /* L3 sample point override */ +#define L3CR_L3CKSP 0x00030000 /* L3 clock sample point */ +#define L3CR_L3PSP 0x0000e000 /* L3 P-clock sample point */ +#define L3CR_L3REP 0x00001000 /* L3 replacement algorithm */ +#define L3CR_L3HWF 0x00000800 /* L3 hardware flush */ +#define L3CR_L3I 0x00000400 /* L3 global invalidate */ +#define L3CR_L3RT 0x00000300 /* L3 SRAM type */ +#define L3CR_L3NIRCA 0x00000080 /* L3 non-integer ratio clock adj. */ +#define L3CR_L3DO 0x00000040 /* L3 data only mode */ +#define L3CR_PMEN 0x00000004 /* L3 private memory enable */ +#define L3CR_PMSIZ 0x00000001 /* L3 private memory size */ +#define SPRN_MSSCR0 0x3f6 /* Memory Subsystem Control Register 0 */ +#define SPRN_MSSSR0 0x3f7 /* Memory Subsystem Status Register 1 */ +#define SPRN_LDSTCR 0x3f8 /* Load/Store control register */ +#define SPRN_LDSTDB 0x3f4 /* */ +#define SPRN_LR 0x008 /* Link Register */ +#define SPRN_MMCR0 0x3B8 /* Monitor Mode Control Register 0 */ +#define SPRN_MMCR1 0x3BC /* Monitor Mode Control Register 1 */ +#ifndef SPRN_PIR +#define SPRN_PIR 0x3FF /* Processor Identification Register */ +#endif +#define SPRN_PMC1 0x3B9 /* Performance Counter Register 1 */ +#define SPRN_PMC2 0x3BA /* Performance Counter Register 2 */ +#define SPRN_PMC3 0x3BD /* Performance Counter Register 3 */ +#define SPRN_PMC4 0x3BE /* Performance Counter Register 4 */ +#define SPRN_PTEHI 0x3D5 /* 981 7450 PTE HI word (S/W TLB load) */ +#define SPRN_PTELO 0x3D6 /* 982 7450 PTE LO word (S/W TLB load) */ +#define SPRN_PVR 0x11F /* Processor Version Register */ +#define SPRN_RPA 0x3D6 /* Required Physical Address Register */ +#define SPRN_SDA 0x3BF /* Sampled Data Address Register */ +#define SPRN_SDR1 0x019 /* MMU Hash Base Register */ +#define SPRN_SIA 0x3BB /* Sampled Instruction Address Register */ +#define SPRN_SPRG0 0x110 /* Special Purpose Register General 0 */ +#define SPRN_SPRG1 0x111 /* Special Purpose Register General 1 */ +#define SPRN_SPRG2 0x112 /* Special Purpose Register General 2 */ +#define SPRN_SPRG3 0x113 /* Special Purpose Register General 3 */ +#define SPRN_SPRG4 0x114 /* Special Purpose Register General 4 */ +#define SPRN_SPRG5 0x115 /* Special Purpose Register General 5 */ +#define SPRN_SPRG6 0x116 /* Special Purpose Register General 6 */ +#define SPRN_SPRG7 0x117 /* Special Purpose Register General 7 */ +#define SPRN_SRR0 0x01A /* Save/Restore Register 0 */ +#define SPRN_SRR1 0x01B /* Save/Restore Register 1 */ +#define SPRN_THRM1 0x3FC /* Thermal Management Register 1 */ +/* these bits were defined in inverted endian sense originally, ugh, confusing */ +#define THRM1_TIN (1 << 31) +#define THRM1_TIV (1 << 30) +#define THRM1_THRES(x) ((x&0x7f)<<23) +#define THRM3_SITV(x) ((x&0x3fff)<<1) +#define THRM1_TID (1<<2) +#define THRM1_TIE (1<<1) +#define THRM1_V (1<<0) +#define SPRN_THRM2 0x3FD /* Thermal Management Register 2 */ +#define SPRN_THRM3 0x3FE /* Thermal Management Register 3 */ +#define THRM3_E (1<<0) +#define SPRN_TLBMISS 0x3D4 /* 980 7450 TLB Miss Register */ +#define SPRN_UMMCR0 0x3A8 /* User Monitor Mode Control Register 0 */ +#define SPRN_UMMCR1 0x3AC /* User Monitor Mode Control Register 0 */ +#define SPRN_UPMC1 0x3A9 /* User Performance Counter Register 1 */ +#define SPRN_UPMC2 0x3AA /* User Performance Counter Register 2 */ +#define SPRN_UPMC3 0x3AD /* User Performance Counter Register 3 */ +#define SPRN_UPMC4 0x3AE /* User Performance Counter Register 4 */ +#define SPRN_USIA 0x3AB /* User Sampled Instruction Address Register */ +#define SPRN_VRSAVE 0x100 /* Vector Register Save Register */ +#define SPRN_XER 0x001 /* Fixed Point Exception Register */ + +/* Bit definitions for MMCR0 and PMC1 / PMC2. */ +#define MMCR0_PMC1_CYCLES (1 << 7) +#define MMCR0_PMC1_ICACHEMISS (5 << 7) +#define MMCR0_PMC1_DTLB (6 << 7) +#define MMCR0_PMC2_DCACHEMISS 0x6 +#define MMCR0_PMC2_CYCLES 0x1 +#define MMCR0_PMC2_ITLB 0x7 +#define MMCR0_PMC2_LOADMISSTIME 0x5 + +/* Short-hand versions for a number of the above SPRNs */ +#define CTR SPRN_CTR /* Counter Register */ +#define DAR SPRN_DAR /* Data Address Register */ +#define DABR SPRN_DABR /* Data Address Breakpoint Register */ +#define DBAT0L SPRN_DBAT0L /* Data BAT 0 Lower Register */ +#define DBAT0U SPRN_DBAT0U /* Data BAT 0 Upper Register */ +#define DBAT1L SPRN_DBAT1L /* Data BAT 1 Lower Register */ +#define DBAT1U SPRN_DBAT1U /* Data BAT 1 Upper Register */ +#define DBAT2L SPRN_DBAT2L /* Data BAT 2 Lower Register */ +#define DBAT2U SPRN_DBAT2U /* Data BAT 2 Upper Register */ +#define DBAT3L SPRN_DBAT3L /* Data BAT 3 Lower Register */ +#define DBAT3U SPRN_DBAT3U /* Data BAT 3 Upper Register */ +#define DBAT4L SPRN_DBAT4L /* Data BAT 4 Lower Register */ +#define DBAT4U SPRN_DBAT4U /* Data BAT 4 Upper Register */ +#define DBAT5L SPRN_DBAT5L /* Data BAT 5 Lower Register */ +#define DBAT5U SPRN_DBAT5U /* Data BAT 5 Upper Register */ +#define DBAT6L SPRN_DBAT6L /* Data BAT 6 Lower Register */ +#define DBAT6U SPRN_DBAT6U /* Data BAT 6 Upper Register */ +#define DBAT7L SPRN_DBAT7L /* Data BAT 7 Lower Register */ +#define DBAT7U SPRN_DBAT7U /* Data BAT 7 Upper Register */ +#define DEC SPRN_DEC /* Decrement Register */ +#define DMISS SPRN_DMISS /* Data TLB Miss Register */ +#define DSISR SPRN_DSISR /* Data Storage Interrupt Status Register */ +#define EAR SPRN_EAR /* External Address Register */ +#define HASH1 SPRN_HASH1 /* Primary Hash Address Register */ +#define HASH2 SPRN_HASH2 /* Secondary Hash Address Register */ +#define HID0 SPRN_HID0 /* Hardware Implementation Register 0 */ +#define HID1 SPRN_HID1 /* Hardware Implementation Register 1 */ +#define IABR SPRN_IABR /* Instruction Address Breakpoint Register */ +#define IBAT0L SPRN_IBAT0L /* Instruction BAT 0 Lower Register */ +#define IBAT0U SPRN_IBAT0U /* Instruction BAT 0 Upper Register */ +#define IBAT1L SPRN_IBAT1L /* Instruction BAT 1 Lower Register */ +#define IBAT1U SPRN_IBAT1U /* Instruction BAT 1 Upper Register */ +#define IBAT2L SPRN_IBAT2L /* Instruction BAT 2 Lower Register */ +#define IBAT2U SPRN_IBAT2U /* Instruction BAT 2 Upper Register */ +#define IBAT3L SPRN_IBAT3L /* Instruction BAT 3 Lower Register */ +#define IBAT3U SPRN_IBAT3U /* Instruction BAT 3 Upper Register */ +#define IBAT4L SPRN_IBAT4L /* Instruction BAT 4 Lower Register */ +#define IBAT4U SPRN_IBAT4U /* Instruction BAT 4 Upper Register */ +#define IBAT5L SPRN_IBAT5L /* Instruction BAT 5 Lower Register */ +#define IBAT5U SPRN_IBAT5U /* Instruction BAT 5 Upper Register */ +#define IBAT6L SPRN_IBAT6L /* Instruction BAT 6 Lower Register */ +#define IBAT6U SPRN_IBAT6U /* Instruction BAT 6 Upper Register */ +#define IBAT7L SPRN_IBAT7L /* Instruction BAT 7 Lower Register */ +#define IBAT7U SPRN_IBAT7U /* Instruction BAT 7 Upper Register */ +#define ICMP SPRN_ICMP /* Instruction TLB Compare Register */ +#define IMISS SPRN_IMISS /* Instruction TLB Miss Register */ +#define IMMR SPRN_IMMR /* PPC 860/821 Internal Memory Map Register */ +#define L2CR SPRN_L2CR /* Classic PPC L2 cache control register */ +#define L3CR SPRN_L3CR /* PPC 745x L3 cache control register */ +#define LR SPRN_LR +#define PVR SPRN_PVR /* Processor Version */ +#define RPA SPRN_RPA /* Required Physical Address Register */ +#define SDR1 SPRN_SDR1 /* MMU hash base register */ +#define SPR0 SPRN_SPRG0 /* Supervisor Private Registers */ +#define SPR1 SPRN_SPRG1 +#define SPR2 SPRN_SPRG2 +#define SPR3 SPRN_SPRG3 +#define SPR4 SPRN_SPRG4 +#define SPR5 SPRN_SPRG5 +#define SPR6 SPRN_SPRG6 +#define SPR7 SPRN_SPRG7 +#define SPRG0 SPRN_SPRG0 +#define SPRG1 SPRN_SPRG1 +#define SPRG2 SPRN_SPRG2 +#define SPRG3 SPRN_SPRG3 +#define SPRG4 SPRN_SPRG4 +#define SPRG5 SPRN_SPRG5 +#define SPRG6 SPRN_SPRG6 +#define SPRG7 SPRN_SPRG7 +#define SRR0 SPRN_SRR0 /* Save and Restore Register 0 */ +#define SRR1 SPRN_SRR1 /* Save and Restore Register 1 */ +#define SRR2 SPRN_SRR2 /* Save and Restore Register 2 */ +#define SRR3 SPRN_SRR3 /* Save and Restore Register 3 */ +#define ICTC SPRN_ICTC /* Instruction Cache Throttling Control Reg */ +#define THRM1 SPRN_THRM1 /* Thermal Management Register 1 */ +#define THRM2 SPRN_THRM2 /* Thermal Management Register 2 */ +#define THRM3 SPRN_THRM3 /* Thermal Management Register 3 */ +#define XER SPRN_XER +#define TBRL SPRN_TBRL /* Time Base Read Lower Register */ +#define TBRU SPRN_TBRU /* Time Base Read Upper Register */ +#define TBWL SPRN_TBWL /* Time Base Write Lower Register */ +#define TBWU SPRN_TBWU /* Time Base Write Upper Register */ + +/* Processor Version Register */ + +/* Processor Version Register (PVR) field extraction */ + +#define PVR_VER(pvr) (((pvr) >> 16) & 0xFFFF) /* Version field */ +#define PVR_REV(pvr) (((pvr) >> 0) & 0xFFFF) /* Revison field */ + +/* + * IBM has further subdivided the standard PowerPC 16-bit version and + * revision subfields of the PVR for the PowerPC 403s into the following: + */ + +#define PVR_FAM(pvr) (((pvr) >> 20) & 0xFFF) /* Family field */ +#define PVR_MEM(pvr) (((pvr) >> 16) & 0xF) /* Member field */ +#define PVR_CORE(pvr) (((pvr) >> 12) & 0xF) /* Core field */ +#define PVR_CFG(pvr) (((pvr) >> 8) & 0xF) /* Configuration field */ +#define PVR_MAJ(pvr) (((pvr) >> 4) & 0xF) /* Major revision field */ +#define PVR_MIN(pvr) (((pvr) >> 0) & 0xF) /* Minor revision field */ + +/* Processor Version Numbers */ + +#define PVR_403GA 0x00200000 +#define PVR_403GB 0x00200100 +#define PVR_403GC 0x00200200 +#define PVR_403GCX 0x00201400 +#define PVR_405GP 0x40110000 +#define PVR_STB03XXX 0x40310000 +#define PVR_NP405H 0x41410000 +#define PVR_NP405L 0x41610000 +#define PVR_440GP_RB 0x40120440 +#define PVR_440GP_RC1 0x40120481 +#define PVR_440GP_RC2 0x40200481 +#define PVR_440GX_RA 0x51b21850 +#define PVR_440GX_RB 0x51b21851 +#define PVR_440GX_RB1 0x51b21852 +#define PVR_601 0x00010000 +#define PVR_602 0x00050000 +#define PVR_603 0x00030000 +#define PVR_603e 0x00060000 +#define PVR_603ev 0x00070000 +#define PVR_603r 0x00071000 +#define PVR_604 0x00040000 +#define PVR_604e 0x00090000 +#define PVR_604r 0x000A0000 +#define PVR_620 0x00140000 +#define PVR_740 0x00080000 +#define PVR_750 PVR_740 +#define PVR_740P 0x10080000 +#define PVR_750P PVR_740P +#define PVR_7400 0x000C0000 +#define PVR_7410 0x800C0000 +#define PVR_7450 0x80000000 +/* + * For the 8xx processors, all of them report the same PVR family for + * the PowerPC core. The various versions of these processors must be + * differentiated by the version number in the Communication Processor + * Module (CPM). + */ +#define PVR_821 0x00500000 +#define PVR_823 PVR_821 +#define PVR_850 PVR_821 +#define PVR_860 PVR_821 +#define PVR_8240 0x00810100 +#define PVR_8245 0x80811014 +#define PVR_8260 PVR_8240 + +/* Segment Registers */ +#define SR0 0 +#define SR1 1 +#define SR2 2 +#define SR3 3 +#define SR4 4 +#define SR5 5 +#define SR6 6 +#define SR7 7 +#define SR8 8 +#define SR9 9 +#define SR10 10 +#define SR11 11 +#define SR12 12 +#define SR13 13 +#define SR14 14 +#define SR15 15 + + +/* returns r3 = relocated address of sym */ +/* modifies r0 */ +#define RELOC_SYM(sym) \ + mflr r3; \ + bl 1f; \ +1: mflr r0; \ + mtlr r3; \ + lis r3, 1b@ha; \ + ori r3, r3, 1b@l; \ + subf r0, r3, r0; \ + lis r3, sym@ha; \ + ori r3, r3, sym@l; \ + add r3, r3, r0 + diff --git a/purgatory/arch/ppc/purgatory-ppc.c b/purgatory/arch/ppc/purgatory-ppc.c new file mode 100644 index 0000000..ab4d941 --- /dev/null +++ b/purgatory/arch/ppc/purgatory-ppc.c @@ -0,0 +1,7 @@ +#include <purgatory.h> +#include "purgatory-ppc.h" + +void setup_arch(void) +{ + /* Nothing for now */ +} diff --git a/purgatory/arch/ppc/purgatory-ppc.h b/purgatory/arch/ppc/purgatory-ppc.h new file mode 100644 index 0000000..e931cae --- /dev/null +++ b/purgatory/arch/ppc/purgatory-ppc.h @@ -0,0 +1,6 @@ +#ifndef PURGATORY_PPC_H +#define PURGATORY_PPC_H + +/* nothing yet */ + +#endif /* PURGATORY_PPC_H */ diff --git a/purgatory/arch/ppc64/Makefile b/purgatory/arch/ppc64/Makefile new file mode 100644 index 0000000..c76794b --- /dev/null +++ b/purgatory/arch/ppc64/Makefile @@ -0,0 +1,7 @@ +# +# Purgatory ppc +# + +PURGATORY_C_SRCS+= +PURGATORY_S_SRCS+= + diff --git a/purgatory/arch/ppc64/include/limits.h b/purgatory/arch/ppc64/include/limits.h new file mode 100644 index 0000000..0c6f21f --- /dev/null +++ b/purgatory/arch/ppc64/include/limits.h @@ -0,0 +1,57 @@ +#ifndef LIMITS_H +#define LIMITS_H 1 + +/* Number of bits in a `char' */ +#define CHAR_BIT 8 + +/* Minimum and maximum values a `signed char' can hold */ +#define SCHAR_MIN (-128) +#define SCHAR_MAX 127 + +/* Maximum value an `unsigned char' can hold. (Minimum is 0.) */ +#define UCHAR_MAX 255 + +/* Minimum and maximum values a `char' can hold */ +#define CHAR_MIN SCHAR_MIN +#define CHAR_MAX SCHAR_MAX + +/* Minimum and maximum values a `signed short int' can hold */ +#define SHRT_MIN (-32768) +#define SHRT_MAX 32767 + +/* Maximum value an `unsigned short' can hold. (Minimum is 0.) */ +#define USHRT_MAX 65535 + + +/* Minimum and maximum values a `signed int' can hold */ +#define INT_MIN (-INT_MAX - 1) +#define INT_MAX 2147483647 + +/* Maximum value an `unsigned int' can hold. (Minimum is 0.) */ +#define UINT_MAX 4294967295U + + +/* Minimum and maximum values a `signed int' can hold */ +#define INT_MIN (-INT_MAX - 1) +#define INT_MAX 2147483647 + +/* Maximum value an `unsigned int' can hold. (Minimum is 0.) */ +#define UINT_MAX 4294967295U + +/* Minimum and maximum values a `signed long' can hold */ +#define LONG_MAX 9223372036854775807L +#define LONG_MIN (-LONG_MAX - 1L) + +/* Maximum value an `unsigned long' can hold. (Minimum is 0.) */ +#define ULONG_MAX 18446744073709551615UL + +/* Minimum and maximum values a `signed long long' can hold */ +#define LLONG_MAX 9223372036854775807LL +#define LLONG_MIN (-LONG_MAX - 1LL) + + +/* Maximum value an `unsigned long long' can hold. (Minimum is 0.) */ +#define ULLONG_MAX 18446744073709551615ULL + + +#endif /* LIMITS_H */ diff --git a/purgatory/arch/ppc64/include/stdint.h b/purgatory/arch/ppc64/include/stdint.h new file mode 100644 index 0000000..2f9c592 --- /dev/null +++ b/purgatory/arch/ppc64/include/stdint.h @@ -0,0 +1,16 @@ +#ifndef STDINT_H +#define STDINT_H + +typedef unsigned long size_t; + +typedef unsigned char uint8_t; +typedef unsigned short uint16_t; +typedef unsigned int uint32_t; +typedef unsigned long uint64_t; + +typedef signed char int8_t; +typedef signed short int16_t; +typedef signed int int32_t; +typedef signed long int64_t; + +#endif /* STDINT_H */ diff --git a/purgatory/arch/x86_64/Makefile b/purgatory/arch/x86_64/Makefile new file mode 100644 index 0000000..d08edff --- /dev/null +++ b/purgatory/arch/x86_64/Makefile @@ -0,0 +1,15 @@ +# +# Purgatory x86_64 +# + +PURGATORY_S_SRCS+= purgatory/arch/i386/entry32-16.S +PURGATORY_S_SRCS+= purgatory/arch/i386/entry32-16-debug.S +PURGATORY_S_SRCS+= purgatory/arch/x86_64/entry64-32.S +PURGATORY_S_SRCS+= purgatory/arch/x86_64/entry64.S +PURGATORY_S_SRCS+= purgatory/arch/x86_64/setup-x86_64.S +PURGATORY_S_SRCS+= purgatory/arch/x86_64/stack.S +PURGATORY_C_SRCS+= purgatory/arch/x86_64/purgatory-x86_64.c +PURGATORY_C_SRCS+= purgatory/arch/i386/console-x86.c +PURGATORY_C_SRCS+= purgatory/arch/i386/vga.c +PURGATORY_C_SRCS+= purgatory/arch/i386/pic.c + diff --git a/purgatory/arch/x86_64/entry64-32.S b/purgatory/arch/x86_64/entry64-32.S new file mode 100644 index 0000000..66f8a85 --- /dev/null +++ b/purgatory/arch/x86_64/entry64-32.S @@ -0,0 +1,134 @@ +/* + * purgatory: setup code + * + * Copyright (C) 2003,2004 Eric Biederman (ebiederm@xmission.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation (version 2 of the License). + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +.data + .equ MSR_K6_EFER, 0xC0000080 + .equ EFER_LME, 0x00000100 + .equ X86_CR4_PAE, 0x00000020 + .equ CR0_PG, 0x80000000 + + .text + .globl entry32, entry32_regs +entry32: + .code64 + + /* Setup a gdt that should that is generally usefully */ + lgdt gdt(%rip) + + /* Switch to 32bit compatiblity mode */ + ljmp *lm_exit_addr(%rip) +lm_exit: + .code32 + + /* Disable paging */ + movl %cr0, %eax + andl $~CR0_PG, %eax + movl %eax, %cr0 + + /* Disable long mode */ + movl $MSR_K6_EFER, %ecx + rdmsr + andl $~EFER_LME, %eax + wrmsr + + /* Disable PAE */ + xorl %eax, %eax + movl %eax, %cr4 + + /* load the data segments */ + movl $0x18, %eax /* data segment */ + movl %eax, %ds + movl %eax, %es + movl %eax, %ss + movl %eax, %fs + movl %eax, %gs + + /* Load the registers */ + movl eax, %eax + movl ecx, %ecx + movl edx, %edx + movl esi, %esi + movl edi, %edi + movl esp, %esp + movl ebp, %ebp + movl ebx, %ebx + + /* Jump to the loaded image */ + jmpl *(eip) + + .section ".rodata" + .balign 16 +gdt: /* 0x00 unusable segment + * 0x08 unused + * so use them as the gdt ptr + */ + .word gdt_end - gdt - 1 + .quad gdt + .word 0, 0, 0 + + /* Documented linux kernel segments */ + /* 0x10 4GB flat code segment */ + .word 0xFFFF, 0x0000, 0x9A00, 0x00CF + /* 0x18 4GB flat data segment */ + .word 0xFFFF, 0x0000, 0x9200, 0x00CF + + /* 0x20 dummy */ + .word 0x0000, 0x0000, 0x0000, 0x000 + /* 0x28 dummy */ + .word 0x0000, 0x0000, 0x0000, 0x000 + /* 0x30 dummy */ + .word 0x0000, 0x0000, 0x0000, 0x000 + /* 0x38 dummy */ + .word 0x0000, 0x0000, 0x0000, 0x000 + /* 0x40 dummy */ + .word 0x0000, 0x0000, 0x0000, 0x000 + /* 0x48 dummy */ + .word 0x0000, 0x0000, 0x0000, 0x000 + /* 0x50 dummy */ + .word 0x0000, 0x0000, 0x0000, 0x000 + /* 0x58 dummy */ + .word 0x0000, 0x0000, 0x0000, 0x000 + + /* Segments used by the 2.5.x kernel */ + /* 0x60 4GB flat code segment */ + .word 0xFFFF, 0x0000, 0x9A00, 0x00CF + /* 0x68 4GB flat data segment */ + .word 0xFFFF, 0x0000, 0x9200, 0x00CF +gdt_end: + + .section ".rodata" + .balign 4 +lm_exit_addr: + .long lm_exit + .long 0x10 + + .section ".rodata" + .balign 4 +entry32_regs: +eax: .long 0x00000000 +ebx: .long 0x00000000 +ecx: .long 0x00000000 +edx: .long 0x00000000 +esi: .long 0x00000000 +edi: .long 0x00000000 +esp: .long 0x00000000 +ebp: .long 0x00000000 +eip: .long entry16 + .size entry32_regs, . - entry32_regs + diff --git a/purgatory/arch/x86_64/entry64.S b/purgatory/arch/x86_64/entry64.S new file mode 100644 index 0000000..1ed6786 --- /dev/null +++ b/purgatory/arch/x86_64/entry64.S @@ -0,0 +1,100 @@ +/* + * kexec: Linux boots Linux + * + * Copyright (C) 2003,2004 Eric Biederman (ebiederm@xmission.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation (version 2 of the License). + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include "arch/debug.h" + +.text +.code64 + .balign 16 + .globl entry64, entry64_regs +entry64: + /* Don't worry about special registers... */ + + /* Setup a gdt that should be preserved */ + lgdt gdt(%rip) + + /* load the data segments */ + movl $0x18, %eax /* data segment */ + movl %eax, %ds + movl %eax, %es + movl %eax, %ss + movl %eax, %fs + movl %eax, %gs + + /* In 64bit mode the code segment is meaningless */ + + /* Load the registers */ + movq rax(%rip), %rax + movq rbx(%rip), %rbx + movq rcx(%rip), %rcx + movq rdx(%rip), %rdx + movq rsi(%rip), %rsi + movq rdi(%rip), %rdi + movq rsp(%rip), %rsp + movq rbp(%rip), %rbp + movq r8(%rip), %r8 + movq r9(%rip), %r9 + movq r10(%rip), %r10 + movq r11(%rip), %r11 + movq r12(%rip), %r12 + movq r13(%rip), %r13 + movq r14(%rip), %r14 + movq r15(%rip), %r15 + + /* Jump to the new code... */ + jmpq *rip(%rip) + + .section ".rodata" + .balign 4 +entry64_regs: +rax: .quad 0x00000000 +rbx: .quad 0x00000000 +rcx: .quad 0x00000000 +rdx: .quad 0x00000000 +rsi: .quad 0x00000000 +rdi: .quad 0x00000000 +rsp: .quad 0x00000000 +rbp: .quad 0x00000000 +r8: .quad 0x00000000 +r9: .quad 0x00000000 +r10: .quad 0x00000000 +r11: .quad 0x00000000 +r12: .quad 0x00000000 +r13: .quad 0x00000000 +r14: .quad 0x00000000 +r15: .quad 0x00000000 +rip: .quad entry32 + .size entry64_regs, . - entry64_regs + + .section ".rodata" + .balign 16 +gdt: /* 0x00 unusable segment + * 0x08 unused + * so use them as the gdt ptr + */ + .word gdt_end - gdt - 1 + .quad gdt + .word 0, 0, 0 + + /* 0x10 4GB flat code segment */ + .word 0xFFFF, 0x0000, 0x9A00, 0x00CF + + /* 0x18 4GB flat data segment */ + .word 0xFFFF, 0x0000, 0x9200, 0x00CF +gdt_end: diff --git a/purgatory/arch/x86_64/include/arch/debug.h b/purgatory/arch/x86_64/include/arch/debug.h new file mode 100644 index 0000000..39f2b16 --- /dev/null +++ b/purgatory/arch/x86_64/include/arch/debug.h @@ -0,0 +1,317 @@ +/* Base Address */ +#define TTYS0_BASE 0x3f8 +/* Data */ +#define TTYS0_RBR (TTYS0_BASE+0x00) +#define TTYS0_TBR (TTYS0_BASE+0x00) +/* Control */ +#define TTYS0_IER (TTYS0_BASE+0x01) +#define TTYS0_IIR (TTYS0_BASE+0x02) +#define TTYS0_FCR (TTYS0_BASE+0x02) +#define TTYS0_LCR (TTYS0_BASE+0x03) +#define TTYS0_MCR (TTYS0_BASE+0x04) + +#define TTYS0_DLL (TTYS0_BASE+0x00) +#define TTYS0_DLM (TTYS0_BASE+0x01) +/* Status */ +#define TTYS0_LSR (TTYS0_BASE+0x05) +#define TTYS0_MSR (TTYS0_BASE+0x06) +#define TTYS0_SCR (TTYS0_BASE+0x07) + +#define TTYS0_BAUD 9600 +#define TTYS0_DIV (115200/TTYS0_BAUD) +#define TTYS0_DIV_LO (TTYS0_DIV&0xFF) +#define TTYS0_DIV_HI ((TTYS0_DIV >> 8)&0xFF) + +#if ((115200%TTYS0_BAUD) != 0) +#error Bad ttyS0 baud rate +#endif + +#define TTYS0_INIT \ + /* disable interrupts */ \ + movb $0x00, %al ; \ + movw $TTYS0_IER, %dx ; \ + outb %al, %dx ; \ + ; \ + /* enable fifos */ \ + movb $0x01, %al ; \ + movw $TTYS0_FCR, %dx ; \ + outb %al, %dx ; \ + ; \ + /* Set Baud Rate Divisor to TTYS0_BAUD */ \ + movw $TTYS0_LCR, %dx ; \ + movb $0x83, %al ; \ + outb %al, %dx ; \ + ; \ + movw $TTYS0_DLL, %dx ; \ + movb $TTYS0_DIV_LO, %al ; \ + outb %al, %dx ; \ + ; \ + movw $TTYS0_DLM, %dx ; \ + movb $TTYS0_DIV_HI, %al ; \ + outb %al, %dx ; \ + ; \ + movw $TTYS0_LCR, %dx ; \ + movb $0x03, %al ; \ + outb %al, %dx + + + /* uses: ax, dx */ +#define TTYS0_TX_AL \ + mov %al, %ah ; \ +9: mov $TTYS0_LSR, %dx ; \ + inb %dx, %al ; \ + test $0x20, %al ; \ + je 9b ; \ + mov $TTYS0_TBR, %dx ; \ + mov %ah, %al ; \ + outb %al, %dx + + /* uses: ax, dx */ +#define TTYS0_TX_CHAR(byte) \ + mov byte, %al ; \ + TTYS0_TX_AL + + /* uses: eax, dx */ +#define TTYS0_TX_HEX32(lword) \ + mov lword, %eax ; \ + shr $28, %eax ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %eax ; \ + shr $24, %eax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %eax ; \ + shr $20, %eax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %eax ; \ + shr $16, %eax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %eax ; \ + shr $12, %eax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %eax ; \ + shr $8, %eax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %eax ; \ + shr $4, %eax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %eax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL + + /* uses: rax, dx */ +#define TTYS0_TX_HEX64(lword) \ + mov lword, %rax ; \ + shr $60, %rax ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + shr $56, %rax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + shr $52, %rax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + shr $48, %rax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + shr $44, %rax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + shr $40, %rax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + shr $36, %rax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + shr $32, %rax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + shr $28, %rax ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + shr $24, %rax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + shr $20, %rax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + shr $16, %rax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + shr $12, %rax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + shr $8, %rax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + shr $4, %rax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL ; \ + ; \ + mov lword, %rax ; \ + and $0x0f, %al ; \ + add $'0', %al ; \ + cmp $'9', %al ; \ + jle 9f ; \ + add $39, %al ; \ +9: ; \ + TTYS0_TX_AL + + +#define DEBUG(x) TTYS0_TX_CHAR($x) ; TTYS0_TX_CHAR($'\r') ; TTYS0_TX_CHAR($'\n') +#define DEBUG_TX_HEX32(x) TTYS0_TX_HEX32(x); TTYS0_TX_CHAR($'\r') ; TTYS0_TX_CHAR($'\n') +#define DEBUG_TX_HEX64(x) TTYS0_TX_HEX64(x); TTYS0_TX_CHAR($'\r') ; TTYS0_TX_CHAR($'\n') + diff --git a/purgatory/arch/x86_64/include/arch/io.h b/purgatory/arch/x86_64/include/arch/io.h new file mode 100644 index 0000000..13ad887 --- /dev/null +++ b/purgatory/arch/x86_64/include/arch/io.h @@ -0,0 +1,98 @@ +#ifndef ARCH_IO_H +#define ARCH_IO_H + +#include <stdint.h> +/* Helper functions for directly doing I/O */ + +extern inline uint8_t inb(uint16_t port) +{ + uint8_t result; + + __asm__ __volatile__ ( + "inb %w1,%0" + :"=a" (result) + :"Nd" (port)); + return result; +} + +extern inline uint16_t inw(uint16_t port) +{ + uint16_t result; + + __asm__ __volatile__ ( + "inw %w1,%0" + :"=a" (result) + :"Nd" (port)); + return result; +} + +extern inline uint32_t inl(uint32_t port) +{ + uint32_t result; + + __asm__ __volatile__ ( + "inl %w1,%0" + :"=a" (result) + :"Nd" (port)); + return result; +} + +extern inline void outb (uint8_t value, uint16_t port) +{ + __asm__ __volatile__ ( + "outb %b0,%w1" + : + :"a" (value), "Nd" (port)); +} + +extern inline void outw (uint16_t value, uint16_t port) +{ + __asm__ __volatile__ ( + "outw %w0,%w1" + : + :"a" (value), "Nd" (port)); +} + +extern inline void outl (uint32_t value, uint16_t port) +{ + __asm__ __volatile__ ( + "outl %0,%w1" + : + :"a" (value), "Nd" (port)); +} + + +/* + * readX/writeX() are used to access memory mapped devices. On some + * architectures the memory mapped IO stuff needs to be accessed + * differently. On the x86 architecture, we just read/write the + * memory location directly. + */ + +static inline unsigned char readb(const volatile void *addr) +{ + return *(volatile unsigned char *) addr; +} +static inline unsigned short readw(const volatile void *addr) +{ + return *(volatile unsigned short *) addr; +} +static inline unsigned int readl(const volatile void *addr) +{ + return *(volatile unsigned int *) addr; +} + +static inline void writeb(unsigned char b, volatile void *addr) +{ + *(volatile unsigned char *) addr = b; +} +static inline void writew(unsigned short b, volatile void *addr) +{ + *(volatile unsigned short *) addr = b; +} +static inline void writel(unsigned int b, volatile void *addr) +{ + *(volatile unsigned int *) addr = b; +} + +#endif /* ARCH_IO_H */ diff --git a/purgatory/arch/x86_64/include/limits.h b/purgatory/arch/x86_64/include/limits.h new file mode 100644 index 0000000..0c6f21f --- /dev/null +++ b/purgatory/arch/x86_64/include/limits.h @@ -0,0 +1,57 @@ +#ifndef LIMITS_H +#define LIMITS_H 1 + +/* Number of bits in a `char' */ +#define CHAR_BIT 8 + +/* Minimum and maximum values a `signed char' can hold */ +#define SCHAR_MIN (-128) +#define SCHAR_MAX 127 + +/* Maximum value an `unsigned char' can hold. (Minimum is 0.) */ +#define UCHAR_MAX 255 + +/* Minimum and maximum values a `char' can hold */ +#define CHAR_MIN SCHAR_MIN +#define CHAR_MAX SCHAR_MAX + +/* Minimum and maximum values a `signed short int' can hold */ +#define SHRT_MIN (-32768) +#define SHRT_MAX 32767 + +/* Maximum value an `unsigned short' can hold. (Minimum is 0.) */ +#define USHRT_MAX 65535 + + +/* Minimum and maximum values a `signed int' can hold */ +#define INT_MIN (-INT_MAX - 1) +#define INT_MAX 2147483647 + +/* Maximum value an `unsigned int' can hold. (Minimum is 0.) */ +#define UINT_MAX 4294967295U + + +/* Minimum and maximum values a `signed int' can hold */ +#define INT_MIN (-INT_MAX - 1) +#define INT_MAX 2147483647 + +/* Maximum value an `unsigned int' can hold. (Minimum is 0.) */ +#define UINT_MAX 4294967295U + +/* Minimum and maximum values a `signed long' can hold */ +#define LONG_MAX 9223372036854775807L +#define LONG_MIN (-LONG_MAX - 1L) + +/* Maximum value an `unsigned long' can hold. (Minimum is 0.) */ +#define ULONG_MAX 18446744073709551615UL + +/* Minimum and maximum values a `signed long long' can hold */ +#define LLONG_MAX 9223372036854775807LL +#define LLONG_MIN (-LONG_MAX - 1LL) + + +/* Maximum value an `unsigned long long' can hold. (Minimum is 0.) */ +#define ULLONG_MAX 18446744073709551615ULL + + +#endif /* LIMITS_H */ diff --git a/purgatory/arch/x86_64/include/stdint.h b/purgatory/arch/x86_64/include/stdint.h new file mode 100644 index 0000000..2f9c592 --- /dev/null +++ b/purgatory/arch/x86_64/include/stdint.h @@ -0,0 +1,16 @@ +#ifndef STDINT_H +#define STDINT_H + +typedef unsigned long size_t; + +typedef unsigned char uint8_t; +typedef unsigned short uint16_t; +typedef unsigned int uint32_t; +typedef unsigned long uint64_t; + +typedef signed char int8_t; +typedef signed short int16_t; +typedef signed int int32_t; +typedef signed long int64_t; + +#endif /* STDINT_H */ diff --git a/purgatory/arch/x86_64/purgatory-x86_64.c b/purgatory/arch/x86_64/purgatory-x86_64.c new file mode 100644 index 0000000..f839ab5 --- /dev/null +++ b/purgatory/arch/x86_64/purgatory-x86_64.c @@ -0,0 +1,12 @@ +#include <arch/io.h> +#include <purgatory.h> +#include "purgatory-x86_64.h" + +uint8_t reset_vga = 0; +uint8_t legacy_pic = 0; + +void setup_arch(void) +{ + if (reset_vga) x86_reset_vga(); + if (legacy_pic) x86_setup_legacy_pic(); +} diff --git a/purgatory/arch/x86_64/purgatory-x86_64.h b/purgatory/arch/x86_64/purgatory-x86_64.h new file mode 100644 index 0000000..209edea --- /dev/null +++ b/purgatory/arch/x86_64/purgatory-x86_64.h @@ -0,0 +1,4 @@ +#ifndef PURGATORY_X86_64_H +#define PURGATORY_X86_64_H +#include "../i386/purgatory-x86.h" +#endif /* PURGATORY_X86_64_H */ diff --git a/purgatory/arch/x86_64/setup-x86_64.S b/purgatory/arch/x86_64/setup-x86_64.S new file mode 100644 index 0000000..d3b5993 --- /dev/null +++ b/purgatory/arch/x86_64/setup-x86_64.S @@ -0,0 +1,73 @@ +/* + * purgatory: setup code + * + * Copyright (C) 2003,2004 Eric Biederman (ebiederm@xmission.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation (version 2 of the License). + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include "arch/debug.h" + + +#undef i386 + + .text + .globl purgatory_start + .balign 16 +purgatory_start: + .code64 + + /* Load a gdt so I know what the segment registers are */ + lgdt gdt(%rip) + + /* load the data segments */ + movl $0x18, %eax /* data segment */ + movl %eax, %ds + movl %eax, %es + movl %eax, %ss + movl %eax, %fs + movl %eax, %gs + + /* In 64bit mode the code segment is meaningless */ + + /* Setup a stack */ + movq $lstack_end, %rsp + + /* Call the C code */ + call purgatory + jmp entry64 + + .section ".rodata" + .balign 16 +gdt: /* 0x00 unusable segment + * 0x08 unused + * so use them as the gdt ptr + */ + .word gdt_end - gdt - 1 + .quad gdt + .word 0, 0, 0 + + /* 0x10 4GB flat code segment */ + .word 0xFFFF, 0x0000, 0x9A00, 0x00AF + + /* 0x18 4GB flat data segment */ + .word 0xFFFF, 0x0000, 0x9200, 0x00CF +gdt_end: + + .bss + .balign 4096 +lstack: + .skip 4096 +lstack_end: + diff --git a/purgatory/arch/x86_64/stack.S b/purgatory/arch/x86_64/stack.S new file mode 100644 index 0000000..4188ea3 --- /dev/null +++ b/purgatory/arch/x86_64/stack.S @@ -0,0 +1,44 @@ +/* + * purgatory: stack + * + * Copyright (C) 2003,2004 Eric Biederman (ebiederm@xmission.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation (version 2 of the License). + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + + /* A stack for the loaded kernel. + * Seperate and in the data section so it can be prepopulated. + */ + .data + .balign 4096 + .globl stack, stack_end + .globl stack_arg32_1, stack_arg32_2, stack_arg32_3 ,stack_arg32_4 + .globl stack_arg32_5, stack_arg32_6, stack_arg32_7 ,stack_arg32_8 + .globl stack_arg64_1, stack_arg64_2, stack_arg64_3 ,stack_arg64_4 + +stack: + .skip 4096 - (8*4) +stack_arg64_4: ; .size stack_arg64_4, 8 +stack_arg32_8: .long 0 ; .size stack_arg32_8, 4 +stack_arg32_7: .long 0 ; .size stack_arg32_7, 4 +stack_arg64_3: ; .size stack_arg64_3, 8 +stack_arg32_6: .long 0 ; .size stack_arg32_6, 4 +stack_arg32_5: .long 0 ; .size stack_arg32_5, 4 +stack_arg64_2: ; .size stack_arg64_2, 8 +stack_arg32_4: .long 0 ; .size stack_arg32_4, 4 +stack_arg32_3: .long 0 ; .size stack_arg32_3, 4 +stack_arg64_1: ; .size stack_arg64_1, 8 +stack_arg32_2: .long 0 ; .size stack_arg32_2, 4 +stack_arg32_1: .long 0 ; .size stack_arg32_1, 4 +stack_end: diff --git a/purgatory/include/purgatory.h b/purgatory/include/purgatory.h new file mode 100644 index 0000000..93037f2 --- /dev/null +++ b/purgatory/include/purgatory.h @@ -0,0 +1,8 @@ +#ifndef PURGATORY_H +#define PURGATORY_H + +void putchar(int ch); +void printf(const char *fmt, ...); +void setup_arch(void); + +#endif /* PURGATORY_H */ diff --git a/purgatory/include/string.h b/purgatory/include/string.h new file mode 100644 index 0000000..87cc4e1 --- /dev/null +++ b/purgatory/include/string.h @@ -0,0 +1,10 @@ +#ifndef STRING_H +#define STRING_H + +size_t strnlen(const char *s, size_t max); +void* memset(void* s, int c, size_t n); +void* memcpy(void *dest, const void *src, size_t len); +int memcmp(void *src1, void *src2, size_t len); + + +#endif /* STRING_H */ diff --git a/purgatory/printf.c b/purgatory/printf.c new file mode 100644 index 0000000..962683d --- /dev/null +++ b/purgatory/printf.c @@ -0,0 +1,128 @@ +#include <stdarg.h> +#include <limits.h> +#include <stdint.h> +#include <purgatory.h> +#include <string.h> + +/* + * Output + * ============================================================================= + */ + +#define LONG_LONG_SHIFT ((int)((sizeof(unsigned long long)*CHAR_BIT) - 4)) +#define LONG_SHIFT ((int)((sizeof(unsigned long)*CHAR_BIT) - 4)) +#define INT_SHIFT ((int)((sizeof(unsigned int)*CHAR_BIT) - 4)) +#define SHRT_SHIFT ((int)((sizeof(unsigned short)*CHAR_BIT) - 4)) +#define CHAR_SHIFT ((int)((sizeof(unsigned char)*CHAR_BIT) - 4)) + +/************************************************************************** +PRINTF and friends + + Formats: + %x - 4 bytes int (8 hex digits, lower case) + %X - 4 bytes int (8 hex digits, upper case) + %lx - 8 bytes long (16 hex digits, lower case) + %lX - 8 bytes long (16 hex digits, upper case) + %hx - 2 bytes int (4 hex digits, lower case) + %hX - 2 bytes int (4 hex digits, upper case) + %hhx - 1 byte int (2 hex digits, lower case) + %hhX - 1 byte int (2 hex digits, upper case) + - optional # prefixes 0x or 0X + %d - decimal int + %c - char + %s - string + Note: width specification not supported +**************************************************************************/ +void printf(const char *fmt, ...) +{ + va_list args; + char *p; + va_start(args, fmt); + for ( ; *fmt != '\0'; ++fmt) { + if (*fmt != '%') { + putchar(*fmt); + continue; + } + if (*++fmt == 's') { + for(p = va_arg(args, char *); *p != '\0'; p++) + putchar(*p); + } + else { /* Length of item is bounded */ + char tmp[40], *q = tmp; + int shift = INT_SHIFT; + if (*fmt == 'L') { + shift = LONG_LONG_SHIFT; + fmt++; + } + else if (*fmt == 'l') { + shift = LONG_SHIFT; + fmt++; + } + else if (*fmt == 'h') { + shift = SHRT_SHIFT; + fmt++; + if (*fmt == 'h') { + shift = CHAR_SHIFT; + fmt++; + } + } + + /* + * Before each format q points to tmp buffer + * After each format q points past end of item + */ + if ((*fmt | 0x20) == 'x') { + /* With x86 gcc, sizeof(long) == sizeof(int) */ + unsigned long long h; + int ncase; + if (shift > LONG_SHIFT) { + h = va_arg(args, unsigned long long); + } + else if (shift > INT_SHIFT) { + h = va_arg(args, unsigned long); + } else { + h = va_arg(args, unsigned int); + } + ncase = (*fmt & 0x20); + for ( ; shift >= 0; shift -= 4) + *q++ = "0123456789ABCDEF"[(h >> shift) & 0xF] | ncase; + } + else if (*fmt == 'd') { + char *r; + long i; + if (shift > LONG_SHIFT) { + i = va_arg(args, long long); + } + else if (shift > INT_SHIFT) { + i = va_arg(args, long); + } else { + i = va_arg(args, int); + } + if (i < 0) { + *q++ = '-'; + i = -i; + } + p = q; /* save beginning of digits */ + do { + *q++ = '0' + (i % 10); + i /= 10; + } while (i); + /* reverse digits, stop in middle */ + r = q; /* don't alter q */ + while (--r > p) { + i = *r; + *r = *p; + *p++ = i; + } + } + else if (*fmt == 'c') + *q++ = va_arg(args, int); + else + *q++ = *fmt; + /* now output the saved string */ + for (p = tmp; p < q; ++p) + putchar(*p); + } + } + va_end(args); +} diff --git a/purgatory/purgatory.c b/purgatory/purgatory.c new file mode 100644 index 0000000..97fc638 --- /dev/null +++ b/purgatory/purgatory.c @@ -0,0 +1,47 @@ +#include <stdarg.h> +#include <limits.h> +#include <stdint.h> +#include <purgatory.h> +#include <sha256.h> +#include <string.h> +#include "../kexec/kexec-sha256.h" + +struct sha256_region sha256_regions[SHA256_REGIONS] = {}; +sha256_digest_t sha256_digest = { }; + +void verify_sha256_digest(void) +{ + struct sha256_region *ptr, *end; + sha256_digest_t digest; + int i; + sha256_context ctx; + sha256_starts(&ctx); + end = &sha256_regions[sizeof(sha256_regions)/sizeof(sha256_regions[0])]; + for(ptr = sha256_regions; ptr < end; ptr++) { + sha256_update(&ctx, ptr->start, ptr->len); + } + sha256_finish(&ctx, digest); + if (memcmp(digest, sha256_digest, sizeof(digest)) != 0) { + printf("sha256 digests do not match :(\n"); + printf(" digest: "); + for(i = 0; i < sizeof(digest); i++) { + printf("%hhx ", digest[i]); + } + printf("\n"); + printf("sha256_digest: "); + for(i = 0; i < sizeof(sha256_digest); i++) { + printf("%hhx ", sha256_digest[i]); + } + printf("\n"); + for(;;) { + /* loop forever */ + } + } +} + +void purgatory(void) +{ + printf("I'm in purgatory\n"); + setup_arch(); + verify_sha256_digest(); +} diff --git a/purgatory/string.c b/purgatory/string.c new file mode 100644 index 0000000..4f35613 --- /dev/null +++ b/purgatory/string.c @@ -0,0 +1,53 @@ +#include <stddef.h> +#include <string.h> + +size_t strnlen(const char *s, size_t max) +{ + size_t len = 0; + while(len < max && *s) { + len++; + s++; + } + return len; +} + +void* memset(void* s, int c, size_t n) +{ + size_t i; + char *ss = (char*)s; + + for (i=0;i<n;i++) ss[i] = c; + return s; +} + + +void* memcpy(void *dest, const void *src, size_t len) +{ + size_t i; + unsigned char *d; + const unsigned char *s; + d = dest; + s = src; + + for (i=0; i < len; i++) + d[i] = s[i]; + + return dest; +} + + +int memcmp(void *src1, void *src2, size_t len) +{ + unsigned char *s1, *s2; + size_t i; + s1 = src1; + s2 = src2; + for(i = 0; i < len; i++) { + if (*s1 != *s2) { + return *s2 - *s1; + } + } + return 0; + +} + |