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-rw-r--r--sim/ppc/emul_bugapi.c581
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diff --git a/sim/ppc/emul_bugapi.c b/sim/ppc/emul_bugapi.c
new file mode 100644
index 00000000000..97028bf9de9
--- /dev/null
+++ b/sim/ppc/emul_bugapi.c
@@ -0,0 +1,581 @@
+/* This file is part of the program psim.
+
+ Copyright (C) 1994-1997, Andrew Cagney <cagney@highland.com.au>
+
+ 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.
+
+ 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+ */
+
+
+#ifndef _EMUL_BUGAPI_C_
+#define _EMUL_BUGAPI_C_
+
+/* Note: this module is called via a table. There is no benefit in
+ making it inline */
+
+#include "emul_generic.h"
+#include "emul_bugapi.h"
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+
+#ifdef HAVE_STRING_H
+#include <string.h>
+#else
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
+#endif
+
+
+/* EMULATION
+
+ BUG - Motorola's embeded firmware BUG interface
+
+ DESCRIPTION
+
+
+
+ */
+
+
+/* from PowerPCBug Debugging Package User's Manual, part 2 of 2 and also bug.S - Dale Rahn */
+#define _INCHR 0x000 /* Input character */
+#define _INSTAT 0x001 /* Input serial port status */
+#define _INLN 0x002 /* Input line (pointer / pointer format) */
+#define _READSTR 0x003 /* Input string (pointer / count format) */
+#define _READLN 0x004 /* Input line (pointer / count format) */
+#define _CHKBRK 0x005 /* Check for break */
+#define _DSKRD 0x010 /* Disk read */
+#define _DSKWR 0x011 /* Disk write */
+#define _DSKCFIG 0x012 /* Disk configure */
+#define _DSKFMT 0x014 /* Disk format */
+#define _DSKCTRL 0x015 /* Disk control */
+#define _NETRD 0x018 /* Read from host */
+#define _NETWR 0x019 /* Write to host */
+#define _NETCFIG 0x01a /* Configure network parameters */
+#define _NETOPN 0x01b /* Open file for reading */
+#define _NETFRD 0x01c /* Retreive specified file blocks */
+#define _NETCTRL 0x01d /* Implement special control functions */
+#define _OUTCHR 0x020 /* Output character (pointer / pointer format) */
+#define _OUTSTR 0x021 /* Output string (pointer / pointer format) */
+#define _OUTLN 0x022 /* Output line (pointer / pointer format) */
+#define _WRITE 0x023 /* Output string (pointer / count format) */
+#define _WRITELN 0x024 /* Output line (pointer / count format) */
+#define _WRITDLN 0x025 /* Output line with data (pointer / count format) */
+#define _PCRLF 0x026 /* Output carriage return and line feed */
+#define _ERASLN 0x027 /* Erase line */
+#define _WRITD 0x028 /* Output string with data (pointer / count format) */
+#define _SNDBRK 0x029 /* Send break */
+#define _DELAY 0x043 /* Timer delay */
+#define _RTC_TM 0x050 /* Time initialization for RTC */
+#define _RTC_DT 0x051 /* Date initialization for RTC */
+#define _RTC_DSP 0x052 /* Display RTC time and date */
+#define _RTC_RD 0x053 /* Read the RTC registers */
+#define _REDIR 0x060 /* Redirect I/O of a system call function */
+#define _REDIR_I 0x061 /* Redirect input */
+#define _REDIR_O 0x062 /* Redirect output */
+#define _RETURN 0x063 /* Return to PPCbug */
+#define _BINDEC 0x064 /* Convert binary to binary coded decimal (BCD) */
+#define _CHANGEV 0x067 /* Parse value */
+#define _STRCMP 0x068 /* Compare two strings (pointer / count format) */
+#define _MULU32 0x069 /* Multiply two 32-bit unsigned integers */
+#define _DIVU32 0x06a /* Divide two 32-bit unsigned integers */
+#define _CHK_SUM 0x06b /* Generate checksum */
+#define _BRD_ID 0x070 /* Return pointer to board ID packet */
+#define _ENVIRON 0x071 /* Access boot environment parameters */
+#define _DIAGFCN 0x074 /* Diagnostic function(s) */
+#define _SIOPEPS 0x090 /* Retrieve SCSI pointers */
+#define _IOINQ 0x120 /* Port inquire */
+#define _IOINFORM 0x124 /* Port inform */
+#define _IOCONFIG 0x128 /* Port configure */
+#define _IODELETE 0x12c /* Port delete */
+#define _SYMBOLTA 0x130 /* Attach symbol table */
+#define _SYMBOLDA 0x131 /* Detach symbol table */
+
+struct bug_map {
+ int value;
+ const char *info;
+};
+
+static const struct bug_map bug_mapping[] = {
+ { _INCHR, ".INCHR -- Input character" },
+ { _INSTAT, ".INSTAT -- Input serial port status" },
+ { _INLN, ".INLN -- Input line (pointer / pointer format)" },
+ { _READSTR, ".READSTR -- Input string (pointer / count format)" },
+ { _READLN, ".READLN -- Input line (pointer / count format)" },
+ { _CHKBRK, ".CHKBRK -- Check for break" },
+ { _DSKRD, ".DSKRD -- Disk read" },
+ { _DSKWR, ".DSKWR -- Disk write" },
+ { _DSKCFIG, ".DSKCFIG -- Disk configure" },
+ { _DSKFMT, ".DSKFMT -- Disk format" },
+ { _DSKCTRL, ".DSKCTRL -- Disk control" },
+ { _NETRD, ".NETRD -- Read from host" },
+ { _NETWR, ".NETWR -- Write to host" },
+ { _NETCFIG, ".NETCFIG -- Configure network parameters" },
+ { _NETOPN, ".NETOPN -- Open file for reading" },
+ { _NETFRD, ".NETFRD -- Retreive specified file blocks" },
+ { _NETCTRL, ".NETCTRL -- Implement special control functions" },
+ { _OUTCHR, ".OUTCHR -- Output character" },
+ { _OUTSTR, ".OUTSTR -- Output string (pointer / pointer format)" },
+ { _OUTLN, ".OUTLN -- Output line (pointer / pointer format)" },
+ { _WRITE, ".WRITE -- Output string (pointer / count format)" },
+ { _WRITELN, ".WRITELN -- Output line (pointer / count format)" },
+ { _WRITDLN, ".WRITDLN -- Output line with data (pointer / count format)" },
+ { _PCRLF, ".PCRLF -- Output carriage return and line feed" },
+ { _ERASLN, ".ERASLN -- Erase line" },
+ { _WRITD, ".WRITD -- Output string with data (pointer / count format)" },
+ { _SNDBRK, ".SNDBRK -- Send break" },
+ { _DELAY, ".DELAY -- Timer delay" },
+ { _RTC_TM, ".RTC_TM -- Time initialization for RTC" },
+ { _RTC_DT, ".RTC_DT -- Date initialization for RTC" },
+ { _RTC_DSP, ".RTC_DSP -- Display RTC time and date" },
+ { _RTC_RD, ".RTC_RD -- Read the RTC registers" },
+ { _REDIR, ".REDIR -- Redirect I/O of a system call function" },
+ { _REDIR, ".REDIR -- Redirect input" },
+ { _REDIR, ".REDIR -- Redirect output" },
+ { _RETURN, ".RETURN -- Return to PPCbug" },
+ { _BINDEC, ".BINDEC -- Convert binary to binary coded decimal (BCD)" },
+ { _CHANGEV, ".CHANGEV -- Parse value" },
+ { _STRCMP, ".STRCMP -- Compare two strings (pointer / count format)" },
+ { _MULU32, ".MULU32 -- Multiply two 32-bit unsigned integers" },
+ { _DIVU32, ".DIVU32 -- Divide two 32-bit unsigned integers" },
+ { _CHK_SUM, ".CHK_SUM -- Generate checksum" },
+ { _BRD_ID, ".BRD_ID -- Return pointer to board ID packet" },
+ { _ENVIRON, ".ENVIRON -- Access boot environment parameters" },
+ { _DIAGFCN, ".DIAGFCN -- Diagnostic function(s)" },
+ { _SIOPEPS, ".SIOPEPS -- Retrieve SCSI pointers" },
+ { _IOINQ, ".IOINQ -- Port inquire" },
+ { _IOINFORM, ".IOINFORM -- Port inform" },
+ { _IOCONFIG, ".IOCONFIG -- Port configure" },
+ { _IODELETE, ".IODELETE -- Port delete" },
+ { _SYMBOLTA, ".SYMBOLTA -- Attach symbol table" },
+ { _SYMBOLDA, ".SYMBOLDA -- Detach symbol table" },
+};
+
+#ifndef BUGAPI_END_ADDRESS
+#define BUGAPI_END_ADDRESS 0x100000
+#endif
+
+enum {
+ nr_bugapi_disks = 2,
+};
+
+
+struct _os_emul_data {
+ device *root;
+ unsigned_word memory_size;
+ unsigned_word top_of_stack;
+ int interrupt_prefix;
+ unsigned_word interrupt_vector_address;
+ unsigned_word system_call_address;
+ unsigned_word stall_cpu_loop_address;
+ int little_endian;
+ int floating_point_available;
+ /* I/O devices */
+ device_instance *output;
+ device_instance *input;
+ device_instance *(disk[nr_bugapi_disks]);
+};
+
+
+static os_emul_data *
+emul_bugapi_create(device *root,
+ bfd *image,
+ const char *name)
+{
+ device *node;
+ os_emul_data *bugapi;
+
+ /* check it really is for us */
+ if (name != NULL
+ && strcmp(name, "bugapi") != 0
+ && strcmp(name, "bug") != 0)
+ return NULL;
+ if (image != NULL
+ && name == NULL
+ && bfd_get_start_address(image) >= BUGAPI_END_ADDRESS)
+ return NULL;
+
+ bugapi = ZALLOC(os_emul_data);
+
+ /* options */
+ emul_add_tree_options(root, image, "bug", "oea",
+ 1 /*oea-interrupt-prefix*/);
+
+ /* add some real hardware, include eeprom memory for the eeprom trap
+ addresses */
+ emul_add_tree_hardware(root);
+ node = tree_parse(root, "/openprom/memory@0xfff00000");
+ tree_parse(node, "./psim,description \"eeprom trap addresses");
+ tree_parse(node, "./reg 0xfff00000 0x3000");
+
+ bugapi->root = root;
+
+ bugapi->memory_size
+ = tree_find_integer_property(root, "/openprom/options/oea-memory-size");
+ bugapi->interrupt_prefix =
+ tree_find_integer_property(root, "/openprom/options/oea-interrupt-prefix");
+ bugapi->interrupt_vector_address = (bugapi->interrupt_prefix
+ ? MASK(0, 43)
+ : 0);
+ bugapi->system_call_address = (bugapi->interrupt_vector_address + 0x00c00);
+ bugapi->stall_cpu_loop_address = (bugapi->system_call_address + 0x000f0);
+ bugapi->top_of_stack = bugapi->memory_size - 0x1000;
+ bugapi->little_endian
+ = tree_find_boolean_property(root, "/options/little-endian?");
+ bugapi->floating_point_available
+ = tree_find_boolean_property(root, "/openprom/options/floating-point?");
+ bugapi->input = NULL;
+ bugapi->output = NULL;
+
+ /* initialization */
+ if (image != NULL)
+ tree_parse(root, "/openprom/init/register/0.pc 0x%lx",
+ (unsigned long)bfd_get_start_address(image));
+ tree_parse(root, "/openprom/init/register/pc 0x%lx",
+ (unsigned long)bugapi->stall_cpu_loop_address);
+ tree_parse(root, "/openprom/init/register/sp 0x%lx",
+ (unsigned long)(bugapi->top_of_stack - 16));
+ tree_parse(root, "/openprom/init/register/msr 0x%x",
+ (msr_recoverable_interrupt
+ | (bugapi->little_endian
+ ? (msr_little_endian_mode
+ | msr_interrupt_little_endian_mode)
+ : 0)
+ | (bugapi->floating_point_available
+ ? msr_floating_point_available
+ : 0)
+ | (bugapi->interrupt_prefix
+ ? msr_interrupt_prefix
+ : 0)
+ ));
+
+ /* patch the system call instruction to call this emulation and then
+ do an rfi */
+ node = tree_parse(root, "/openprom/init/data@0x%lx",
+ (unsigned long)bugapi->system_call_address);
+ tree_parse(node, "./psim,description \"system-call trap instruction");
+ tree_parse(node, "./real-address 0x%lx",
+ (unsigned long)bugapi->system_call_address);
+ tree_parse(node, "./data 0x%x", emul_call_instruction);
+ node = tree_parse(root, "/openprom/init/data@0x%lx",
+ (unsigned long)bugapi->system_call_address + 4);
+ tree_parse(node, "./psim,description \"return from interrupt instruction");
+ tree_parse(node, "./real-address 0x%lx",
+ (unsigned long)bugapi->system_call_address + 4);
+ tree_parse(node, "./data 0x%x",
+ emul_rfi_instruction);
+
+ /* patch the end of the system call instruction so that it contains
+ a loop to self instruction and point all the cpu's at this */
+ node = tree_parse(root, "/openprom/init/data@0x%lx",
+ (unsigned long)bugapi->stall_cpu_loop_address);
+ tree_parse(node, "./psim,description \"cpu-loop instruction");
+ tree_parse(node, "./real-address 0x%lx",
+ (unsigned long)bugapi->stall_cpu_loop_address);
+ tree_parse(node, "./data 0x%lx",
+ (unsigned long)emul_loop_instruction);
+
+ if (image != NULL)
+ tree_parse(root, "/openprom/init/stack/stack-type %s",
+ (image->xvec->flavour == bfd_target_elf_flavour
+ ? "ppc-elf"
+ : "ppc-xcoff"));
+
+ if (image != NULL)
+ tree_parse(root, "/openprom/init/load-binary/file-name \"%s",
+ bfd_get_filename(image));
+
+ return bugapi;
+}
+
+static void
+emul_bugapi_init(os_emul_data *bugapi,
+ int nr_cpus)
+{
+ int i;
+ /* get the current input/output devices that were created during
+ device tree initialization */
+ bugapi->input = tree_find_ihandle_property(bugapi->root, "/chosen/stdin");
+ bugapi->output = tree_find_ihandle_property(bugapi->root, "/chosen/stdout");
+ /* if present, extract the selected disk devices */
+ for (i = 0; i < nr_bugapi_disks; i++) {
+ char disk[32];
+ char *chp;
+ strcpy(disk, "/chosen/disk0");
+ ASSERT(sizeof(disk) > strlen(disk));
+ chp = strchr(disk, '0');
+ *chp = *chp + i;
+ if (tree_find_property(bugapi->root, disk) != NULL)
+ bugapi->disk[i] = tree_find_ihandle_property(bugapi->root, disk);
+ }
+}
+
+static const char *
+emul_bugapi_instruction_name(int call_id)
+{
+ static char buffer[40];
+ int i;
+
+ for (i = 0; i < sizeof (bug_mapping) / sizeof (bug_mapping[0]); i++)
+ {
+ if (bug_mapping[i].value == call_id)
+ return bug_mapping[i].info;
+ }
+
+ (void) sprintf (buffer, "Unknown bug call 0x%x", call_id);
+ return buffer;
+}
+
+static int
+emul_bugapi_do_read(os_emul_data *bugapi,
+ cpu *processor,
+ unsigned_word cia,
+ unsigned_word buf,
+ int nbytes)
+{
+ unsigned char *scratch_buffer;
+ int status;
+
+ /* get a tempoary bufer */
+ scratch_buffer = (unsigned char *) zalloc(nbytes);
+
+ /* check if buffer exists by reading it */
+ emul_read_buffer((void *)scratch_buffer, buf, nbytes, processor, cia);
+
+ /* read */
+ status = device_instance_read(bugapi->input,
+ (void *)scratch_buffer, nbytes);
+
+ /* -1 = error, -2 = nothing available - see "serial" [IEEE1275] */
+ if (status < 0) {
+ status = 0;
+ }
+
+ if (status > 0) {
+ emul_write_buffer((void *)scratch_buffer, buf, status, processor, cia);
+
+ /* Bugapi chops off the trailing n, but leaves it in the buffer */
+ if (scratch_buffer[status-1] == '\n' || scratch_buffer[status-1] == '\r')
+ status--;
+ }
+
+ zfree(scratch_buffer);
+ return status;
+}
+
+static void
+emul_bugapi_do_diskio(os_emul_data *bugapi,
+ cpu *processor,
+ unsigned_word cia,
+ unsigned_word descriptor_addr,
+ int call_id)
+{
+ struct dskio_descriptor {
+ unsigned_1 ctrl_lun;
+ unsigned_1 dev_lun;
+ unsigned_2 status;
+ unsigned_word pbuffer;
+ unsigned_4 blk_num;
+ unsigned_2 blk_cnt;
+ unsigned_1 flag;
+#define BUG_FILE_MARK 0x80
+#define IGNORE_FILENUM 0x02
+#define END_OF_FILE 0x01
+ unsigned_1 addr_mod;
+ } descriptor;
+ int block;
+ emul_read_buffer(&descriptor, descriptor_addr, sizeof(descriptor),
+ processor, cia);
+ T2H(descriptor.ctrl_lun);
+ T2H(descriptor.dev_lun);
+ T2H(descriptor.status);
+ T2H(descriptor.pbuffer);
+ T2H(descriptor.blk_num);
+ T2H(descriptor.blk_cnt);
+ T2H(descriptor.flag);
+ T2H(descriptor.addr_mod);
+ if (descriptor.dev_lun >= nr_bugapi_disks
+ || bugapi->disk[descriptor.dev_lun] == NULL) {
+ error("emul_bugapi_do_diskio: attempt to access unconfigured disk /chosen/disk%d",
+ descriptor.dev_lun);
+ }
+ else {
+ for (block = 0; block < descriptor.blk_cnt; block++) {
+ device_instance *disk = bugapi->disk[descriptor.dev_lun];
+ unsigned_1 buf[512]; /*????*/
+ unsigned_word block_nr = descriptor.blk_num + block;
+ unsigned_word byte_nr = block_nr * sizeof(buf);
+ unsigned_word block_addr = descriptor.pbuffer + block*sizeof(buf);
+ if (device_instance_seek(disk, 0, byte_nr) < 0)
+ error("emul_bugapi_do_diskio: bad seek\n");
+ switch (call_id) {
+ case _DSKRD:
+ if (device_instance_read(disk, buf, sizeof(buf)) != sizeof(buf))
+ error("emul_`bugapi_do_diskio: bad read\n");
+ emul_write_buffer(buf, block_addr, sizeof(buf), processor, cia);
+ break;
+ case _DSKWR:
+ emul_read_buffer(buf, block_addr, sizeof(buf), processor, cia);
+ if (device_instance_write(disk, buf, sizeof(buf)) != sizeof(buf))
+ error("emul_bugapi_do_diskio: bad write\n");
+ break;
+ default:
+ error("emul_bugapi_do_diskio: bad switch\n");
+ }
+ }
+ }
+}
+
+static void
+emul_bugapi_do_write(os_emul_data *bugapi,
+ cpu *processor,
+ unsigned_word cia,
+ unsigned_word buf,
+ int nbytes,
+ const char *suffix)
+{
+ void *scratch_buffer = NULL;
+
+ /* get a tempoary bufer */
+ if (nbytes > 0)
+ {
+ scratch_buffer = zalloc(nbytes);
+
+ /* copy in */
+ emul_read_buffer(scratch_buffer, buf, nbytes,
+ processor, cia);
+
+ /* write */
+ device_instance_write(bugapi->output, scratch_buffer, nbytes);
+
+ zfree(scratch_buffer);
+ }
+
+ if (suffix)
+ device_instance_write(bugapi->output, suffix, strlen(suffix));
+
+ flush_stdoutput ();
+}
+
+static int
+emul_bugapi_instruction_call(cpu *processor,
+ unsigned_word cia,
+ unsigned_word ra,
+ os_emul_data *bugapi)
+{
+ const int call_id = cpu_registers(processor)->gpr[10];
+ unsigned char uc;
+
+#define MY_INDEX itable_instruction_call
+ ITRACE (trace_os_emul,
+ (" 0x%x %s, r3 = 0x%lx, r4 = 0x%lx\n",
+ call_id, emul_bugapi_instruction_name (call_id),
+ (long)cpu_registers(processor)->gpr[3],
+ (long)cpu_registers(processor)->gpr[4]));;
+
+ /* check that this isn't an invalid instruction */
+ if (cia != bugapi->system_call_address)
+ return 0;
+
+ switch (call_id) {
+ default:
+ error("emul-bugapi: unimplemented bugapi %s from address 0x%lx\n",
+ emul_bugapi_instruction_name (call_id), SRR0);
+ break;
+
+ /* read a single character, output r3 = byte */
+ /* FIXME: Add support to unbuffer input */
+ case _INCHR:
+ if (device_instance_read(bugapi->input, (void *)&uc, 1) <= 0)
+ uc = 0;
+ cpu_registers(processor)->gpr[3] = uc;
+ break;
+
+ /* read a line of at most 256 bytes, r3 = ptr to 1st byte, output r3 = ptr to last byte+1 */
+ case _INLN:
+ cpu_registers(processor)->gpr[3] += emul_bugapi_do_read(bugapi,
+ processor, cia,
+ cpu_registers(processor)->gpr[3],
+ 256);
+ break;
+
+ /* output a character, r3 = character */
+ case _OUTCHR:
+ {
+ char out = (char)cpu_registers(processor)->gpr[3];
+ device_instance_write(bugapi->output, &out, 1);
+ break;
+ }
+
+ /* output a string, r3 = ptr to 1st byte, r4 = ptr to last byte+1 */
+ case _OUTSTR:
+ emul_bugapi_do_write(bugapi,
+ processor, cia,
+ cpu_registers(processor)->gpr[3],
+ cpu_registers(processor)->gpr[4] - cpu_registers(processor)->gpr[3],
+ (const char *)0);
+ break;
+
+ /* output a string followed by \r\n, r3 = ptr to 1st byte, r4 = ptr to last byte+1 */
+ case _OUTLN:
+
+ emul_bugapi_do_write(bugapi,
+ processor, cia,
+ cpu_registers(processor)->gpr[3],
+ cpu_registers(processor)->gpr[4] - cpu_registers(processor)->gpr[3],
+ "\n");
+ break;
+
+ /* output a \r\n */
+ case _PCRLF:
+ device_instance_write(bugapi->output, "\n", 1);
+ break;
+
+ /* read/write blocks of data to/from the disk */
+ case _DSKWR:
+ case _DSKRD:
+ emul_bugapi_do_diskio(bugapi, processor, cia,
+ cpu_registers(processor)->gpr[3],
+ call_id);
+ break;
+
+ /* return to ppcbug monitor (exiting with gpr[3] as status is not
+ part of the bug monitor) */
+ case _RETURN:
+ cpu_halt(processor, cia, was_exited, cpu_registers(processor)->gpr[3]);
+ break;
+ }
+ return 1;
+ /* the instruction following this one is a RFI. Thus by just
+ continuing the return from system call is performed */
+}
+
+const os_emul emul_bugapi = {
+ "bugapi",
+ emul_bugapi_create,
+ emul_bugapi_init,
+ 0, /*system_call*/
+ emul_bugapi_instruction_call,
+ 0 /*data*/
+};
+
+#endif
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