/* This file is part of the program psim.
- Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>
+ 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
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.
-
+
*/
#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 _READLN 0x004 /* Input line (pointer / count format) */
#define _CHKBRK 0x005 /* Check for break */
#define _DSKRD 0x010 /* Disk read */
-#define _DKSWR 0x011 /* Disk write */
+#define _DSKWR 0x011 /* Disk write */
#define _DSKCFIG 0x012 /* Disk configure */
#define _DSKFMT 0x014 /* Disk format */
#define _DSKCTRL 0x015 /* Disk control */
{ _READLN, ".READLN -- Input line (pointer / count format)" },
{ _CHKBRK, ".CHKBRK -- Check for break" },
{ _DSKRD, ".DSKRD -- Disk read" },
- { _DKSWR, ".DKSWR -- Disk write" },
+ { _DSKWR, ".DSKWR -- Disk write" },
{ _DSKCFIG, ".DSKCFIG -- Disk configure" },
{ _DSKFMT, ".DSKFMT -- Disk format" },
{ _DSKCTRL, ".DSKCTRL -- Disk control" },
{ _SYMBOLDA, ".SYMBOLDA -- Detach symbol table" },
};
-#ifndef OEA_START_ADDRESS
-#define OEA_START_ADDRESS 0x100000
+#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;
/* I/O devices */
device_instance *output;
device_instance *input;
+ device_instance *(disk[nr_bugapi_disks]);
};
bfd *image,
const char *name)
{
- int elf_binary;
device *node;
os_emul_data *bugapi;
return NULL;
if (image != NULL
&& name == NULL
- && bfd_get_start_address(image) > OEA_START_ADDRESS)
+ && bfd_get_start_address(image) >= BUGAPI_END_ADDRESS)
return NULL;
bugapi = ZALLOC(os_emul_data);
- /* some defaults */
- elf_binary = image->xvec->flavour == bfd_target_elf_flavour;
-
/* options */
emul_add_tree_options(root, image, "bug", "oea",
1 /*oea-interrupt-prefix*/);
-
- /* add some real hardware */
+
+ /* 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
- = device_find_integer_property(root, "/openprom/options/oea-memory-size");
+ = tree_find_integer_property(root, "/openprom/options/oea-memory-size");
bugapi->interrupt_prefix =
- device_find_integer_property(root, "/openprom/options/oea-interrupt-prefix");
+ tree_find_integer_property(root, "/openprom/options/oea-interrupt-prefix");
bugapi->interrupt_vector_address = (bugapi->interrupt_prefix
? MASK(0, 43)
: 0);
bugapi->stall_cpu_loop_address = (bugapi->system_call_address + 0x000f0);
bugapi->top_of_stack = bugapi->memory_size - 0x1000;
bugapi->little_endian
- = device_find_boolean_property(root, "/options/little-endian?");
+ = tree_find_boolean_property(root, "/options/little-endian?");
bugapi->floating_point_available
- = device_find_boolean_property(root, "/openprom/options/floating-point?");
- bugapi->input
- = device_find_ihandle_property(root, "/chosen/stdin");
- bugapi->output
- = device_find_ihandle_property(root, "/chosen/stdout");
+ = tree_find_boolean_property(root, "/openprom/options/floating-point?");
+ bugapi->input = NULL;
+ bugapi->output = NULL;
/* initialization */
- device_tree_add_parsed(root, "/openprom/init/register/0.pc 0x%lx",
- (unsigned long)bfd_get_start_address(image));
- device_tree_add_parsed(root, "/openprom/init/register/pc 0x%lx",
- (unsigned long)bugapi->stall_cpu_loop_address);
- device_tree_add_parsed(root, "/openprom/init/register/sp 0x%lx",
- (unsigned long)(bugapi->top_of_stack - 16));
- device_tree_add_parsed(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)
- ));
-
+ 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 = device_tree_add_parsed(root, "/openprom/init/data@0x%lx",
- (unsigned long)bugapi->system_call_address);
- device_tree_add_parsed(node, "./real-address 0x%lx",
- (unsigned long)bugapi->system_call_address);
- device_tree_add_parsed(node, "./data 0x%x",
- emul_call_instruction);
- node = device_tree_add_parsed(root, "/openprom/init/data@0x%lx",
- (unsigned long)bugapi->system_call_address + 4);
- device_tree_add_parsed(node, "./real-address 0x%lx",
- (unsigned long)bugapi->system_call_address + 4);
- device_tree_add_parsed(node, "./data 0x%x",
- emul_rfi_instruction);
+ 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 = device_tree_add_parsed(root, "/openprom/init/data@0x%lx",
- (unsigned long)bugapi->stall_cpu_loop_address);
- device_tree_add_parsed(node, "./real-address 0x%lx",
- (unsigned long)bugapi->stall_cpu_loop_address);
- device_tree_add_parsed(node, "./data 0x%lx",
- (unsigned long)emul_loop_instruction);
-
- device_tree_add_parsed(root, "/openprom/init/stack/stack-type %s",
- elf_binary ? "elf" : "aix");
-
- device_tree_add_parsed(root, "/openprom/init/load-binary/file-name \"%s",
- bfd_get_filename(image));
+ 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 *emul_data,
+emul_bugapi_init(os_emul_data *bugapi,
int nr_cpus)
{
- /* nothing happens here */
+ 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 *
/* 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);
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--;
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,
const char *suffix)
{
void *scratch_buffer = NULL;
- int nr_moved;
/* get a tempoary bufer */
if (nbytes > 0)
scratch_buffer = zalloc(nbytes);
/* copy in */
- nr_moved = vm_data_map_read_buffer(cpu_data_map(processor),
- scratch_buffer,
- buf,
- nbytes);
- if (nr_moved != nbytes) {
- /* FIXME - should handle better */
- error("system_call()write copy failed (nr_moved=%d != nbytes=%d)\n",
- nr_moved, nbytes);
- }
-
+ emul_read_buffer(scratch_buffer, buf, nbytes,
+ processor, cia);
+
/* write */
device_instance_write(bugapi->output, scratch_buffer, nbytes);
os_emul_data *bugapi)
{
const int call_id = cpu_registers(processor)->gpr[10];
- const char *my_prefix UNUSED = "bugapi";
unsigned char uc;
- 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]));;
+#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:
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,
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;
}
- break;
+
/* output a string, r3 = ptr to 1st byte, r4 = ptr to last byte+1 */
case _OUTSTR:
emul_bugapi_do_write(bugapi,
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;
- /* return to ppcbug monitor */
+
+ /* 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, 0); /* always succeeds */
+ cpu_halt(processor, cia, was_exited, cpu_registers(processor)->gpr[3]);
break;
}
return 1;
projects / deliverable / binutils-gdb.git / blobdiff