ia64 support

This patch adds support for kexec-tools on ia64. This patch applies on
top of -kdump7 patch from <http://lse.sourceforge.net/kdump/>.

Signed-off-by: Khalid Aziz <khalid.aziz@hp.com>
Signed-off-by: Maneesh Soni <maneesh@in.ibm.com>

4 files changed, 218 insertions, 2 deletions

diff --git a/purgatory/arch/ia64/Makefile b/purgatory/arch/ia64/Makefile
index 8ba596e..6d6d2f5 100644
--- a/purgatory/arch/ia64/Makefile
+++ b/purgatory/arch/ia64/Makefile
@@ -1,8 +1,8 @@
 #
 # Purgatory ia64
 #
-
-PURGATORY_S_SRCS+=
+PCFLAGS		+= -ffixed-r28
+PURGATORY_S_SRCS+= purgatory/arch/ia64/entry.S
 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/entry.S b/purgatory/arch/ia64/entry.S
new file mode 100644
index 0000000..78169a6
--- /dev/null
+++ b/purgatory/arch/ia64/entry.S
@@ -0,0 +1,85 @@
+/*
+ * purgatory:  setup code
+ *
+ * Copyright (C) 2005  Zou Nan hai (nanhai.zou@intel.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.
+ */
+
+.global __dummy_efi_function
+.align  32
+.proc  __dummy_efi_function
+__dummy_efi_function:
+	mov r8=r0;;
+	br.ret.sptk.many rp;;
+.global __dummy_efi_function_end
+__dummy_efi_function_end:
+.endp 	__dummy_efi_function
+
+.global purgatory_start
+.align  32
+.proc   purgatory_start
+purgatory_start:
+	movl r2=__gp_value;;
+	ld8 gp=[r2];;
+	br.call.sptk.many b0=purgatory
+	;;
+	alloc r2 = ar.pfs, 0, 0, 5, 0
+	;;
+	mov out0=r28
+
+	movl r2=__command_line;;
+	ld8 out1=[r2];;
+	movl r2=__command_line_len;;
+	ld8 out2=[r2];;
+	movl r2=__ramdisk_base;;
+	ld8 out3=[r2];;
+	movl r2=__ramdisk_size;;
+	ld8 out4=[r2];;
+	br.call.sptk.many b0=ia64_env_setup
+	movl r10=__kernel_entry;;
+	ld8 r14=[r10];;
+	mov b6=r14;;
+	mov ar.lc=r0
+	mov ar.ec=r0
+	cover;;
+	invala;;
+	br.call.sptk.many  b0=b6
+.endp   purgatory_start
+
+.align  32
+.global __kernel_entry
+.size	__kernel_entry, 8
+__kernel_entry:
+        data8 0x0
+.global __command_line
+.size	__command_line, 8
+__command_line:
+        data8 0x0
+.global __command_line_len
+.size	__command_line_len, 8
+__command_line_len:
+        data8 0x0
+.global __ramdisk_base
+.size	__ramdisk_base, 8
+__ramdisk_base:
+        data8 0x0
+.global __ramdisk_size
+.size	__ramdisk_size, 8
+__ramdisk_size:
+        data8 0x0
+.global __gp_value
+.size	__gp_value, 8
+__gp_value:
+        data8 0x0
diff --git a/purgatory/arch/ia64/include/arch/io.h b/purgatory/arch/ia64/include/arch/io.h
new file mode 100644
index 0000000..7b313fc
--- /dev/null
+++ b/purgatory/arch/ia64/include/arch/io.h
@@ -0,0 +1,25 @@
+#ifndef ARCH_IO_H
+#define ARCH_IO_H
+
+#include <stdint.h>
+/* Helper functions for directly doing I/O */
+
+extern inline uint8_t inb(void *port)
+{
+	volatile unsigned char *addr = (unsigned char *)port;
+	uint8_t result;
+
+	result = *addr;
+	asm volatile ("mf.a"::: "memory");
+	return result;
+}
+
+extern inline void outb (uint8_t value, void *port)
+{
+	volatile unsigned char *addr = (unsigned char *)port;
+
+	*addr = value;
+	asm volatile ("mf.a"::: "memory");
+}
+
+#endif /* ARCH_IO_H */
diff --git a/purgatory/arch/ia64/purgatory-ia64.c b/purgatory/arch/ia64/purgatory-ia64.c
index 369e175..8d2008c 100644
--- a/purgatory/arch/ia64/purgatory-ia64.c
+++ b/purgatory/arch/ia64/purgatory-ia64.c
@@ -1,10 +1,116 @@
 #include <purgatory.h>
+#include <stdint.h>
+#include <string.h>
 #include "purgatory-ia64.h"
 
+#define PAGE_OFFSET             0xe000000000000000
+
+typedef struct {
+        uint64_t signature;
+        uint32_t revision;
+        uint32_t headersize;
+        uint32_t crc32;
+        uint32_t reserved;
+} efi_table_hdr_t;
+
+typedef struct {
+        efi_table_hdr_t hdr;
+        unsigned long get_time;
+        unsigned long set_time;
+        unsigned long get_wakeup_time;
+        unsigned long set_wakeup_time;
+        unsigned long set_virtual_address_map;
+        unsigned long convert_pointer;
+        unsigned long get_variable;
+        unsigned long get_next_variable;
+        unsigned long set_variable;
+        unsigned long get_next_high_mono_count;
+        unsigned long reset_system;
+} efi_runtime_services_t;
+
+typedef struct {
+        efi_table_hdr_t hdr;
+        unsigned long fw_vendor;        /* physical addr of CHAR16 vendor string
+ */
+        uint32_t fw_revision;
+        unsigned long con_in_handle;
+        unsigned long con_in;
+        unsigned long con_out_handle;
+        unsigned long con_out;
+        unsigned long stderr_handle;
+        unsigned long stderr;
+        unsigned long runtime;
+        unsigned long boottime;
+        unsigned long nr_tables;
+        unsigned long tables;
+} efi_system_table_t;
+
+struct ia64_boot_param {
+        uint64_t command_line;             /* physical address of command line arguments */
+        uint64_t efi_systab;               /* physical address of EFI system table */
+        uint64_t efi_memmap;               /* physical address of EFI memory map */
+        uint64_t efi_memmap_size;          /* size of EFI memory map */
+        uint64_t efi_memdesc_size;         /* size of an EFI memory map descriptor */
+        uint32_t efi_memdesc_version;      /* memory descriptor version */
+        struct {
+                uint16_t num_cols; /* number of columns on console output device */
+                uint16_t num_rows; /* number of rows on console output device */
+                uint16_t orig_x;   /* cursor's x position */
+                uint16_t orig_y;   /* cursor's y position */
+        } console_info;
+        uint64_t fpswa;            /* physical address of the fpswa interface */
+        uint64_t initrd_start;
+        uint64_t initrd_size;
+};
+
 void setup_arch(void)
 {
 	/* Nothing for now */
 }
+inline unsigned long PA(unsigned long addr)
+{
+	return addr - PAGE_OFFSET;
+}
+
+void flush_icache_range(char *start, unsigned long len)
+{
+	unsigned long i;
+	for (i = 0;i < len; i += 32)
+	  asm volatile("fc.i %0"::"r"(start+i):"memory");
+	asm volatile (";;sync.i;;":::"memory");
+	asm volatile ("srlz.i":::"memory");
+}
+
+extern char __dummy_efi_function[], __dummy_efi_function_end[];
+
+void ia64_env_setup(struct ia64_boot_param *boot_param,
+	uint64_t command_line, uint64_t command_line_len,
+	uint64_t ramdisk_base, uint64_t ramdisk_size)
+{
+	unsigned long len;
+        efi_system_table_t *systab;
+        efi_runtime_services_t *runtime;
+	unsigned long *set_virtual_address_map;
+
+	// patch efi_runtime->set_virtual_address_map to a
+	// dummy function
+	len = __dummy_efi_function_end - __dummy_efi_function;
+	memcpy((char *)command_line + command_line_len, __dummy_efi_function,
+	len);
+	systab = (efi_system_table_t *)boot_param->efi_systab;
+	runtime = (efi_runtime_services_t *)PA(systab->runtime);
+	set_virtual_address_map =
+		(unsigned long *)PA(runtime->set_virtual_address_map);
+	*(set_virtual_address_map)=
+		(unsigned long)((char *)command_line + command_line_len);
+	flush_icache_range((char *)command_line+command_line_len, len);
+
+	boot_param->command_line = command_line;
+	boot_param->console_info.orig_x = 0;
+	boot_param->console_info.orig_y = 0;
+	boot_param->initrd_start = ramdisk_base;
+	boot_param->initrd_size =  ramdisk_size;
+}
 
 /* This function can be used to execute after the SHA256 verification. */
 void post_verification_setup_arch(void)