diff options
Diffstat (limited to 'sim/ppc/emul_bugapi.c')
| -rw-r--r-- | sim/ppc/emul_bugapi.c | 532 |
1 files changed, 0 insertions, 532 deletions
diff --git a/sim/ppc/emul_bugapi.c b/sim/ppc/emul_bugapi.c deleted file mode 100644 index 4c1e9ba..0000000 --- a/sim/ppc/emul_bugapi.c +++ /dev/null @@ -1,532 +0,0 @@ -/* This file is part of the program psim. - - Copyright (C) 1994-1996, 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 - - -/* 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 - - - -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; -}; - - -static os_emul_data * -emul_bugapi_create(device *root, - bfd *image, - const char *name) -{ - int elf_binary; - 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); - - /* 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 */ - emul_add_tree_hardware(root); - - bugapi->root = root; - - bugapi->memory_size - = device_find_integer_property(root, "/openprom/options/oea-memory-size"); - bugapi->interrupt_prefix = - device_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 - = device_find_boolean_property(root, "/options/little-endian?"); - bugapi->floating_point_available - = device_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) - )); - - /* 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); - - /* 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 ? "ppc-elf" : "ppc-xcoff"); - - device_tree_add_parsed(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) -{ - /* get the current input/output devices that were created during - device tree initialization */ - bugapi->input = device_find_ihandle_property(bugapi->root, "/chosen/stdin"); - bugapi->output = device_find_ihandle_property(bugapi->root, "/chosen/stdout"); - bugapi->disk = device_find_ihandle_property(bugapi->root, "/chosen/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); - for (block = 0; block < descriptor.blk_cnt; block++) { - 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(bugapi->disk, 0, byte_nr) < 0) - error("emul_bugapi_do_diskio: bad seek\n"); - switch (call_id) { - case _DSKRD: - if (device_instance_read(bugapi->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(bugapi->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; - 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); - } - - /* 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 |