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/* |
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* Copyright (C) 2003-2005 Anders Gavare. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* |
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* $Id: dec_prom.c,v 1.60 2005/06/26 11:36:28 debug Exp $ |
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* |
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* DECstation PROM emulation. |
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*/ |
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|
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <sys/types.h> |
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#include <sys/time.h> |
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#include <sys/resource.h> |
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|
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#include "console.h" |
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#include "cpu.h" |
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#include "cpu_mips.h" |
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#include "diskimage.h" |
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#include "machine.h" |
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#include "memory.h" |
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#include "misc.h" |
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|
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#include "dec_prom.h" |
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#include "dec_5100.h" |
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#include "dec_kn01.h" |
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#include "dec_kn02.h" |
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#include "dec_kn03.h" |
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|
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|
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extern int quiet_mode; |
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|
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|
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/* |
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* mem_readchar(): |
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* |
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* Reads a byte from emulated RAM, using a MIPS register as a base address. |
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* (Helper function.) |
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*/ |
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static unsigned char mem_readchar(struct cpu *cpu, int regbase, int offset) |
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{ |
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unsigned char ch; |
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cpu->memory_rw(cpu, cpu->mem, cpu->cd.mips.gpr[regbase] + offset, |
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&ch, sizeof(ch), MEM_READ, CACHE_DATA | NO_EXCEPTIONS); |
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return ch; |
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} |
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|
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|
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/* |
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* dec_jumptable_func(): |
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* |
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* The jumptable is located at the beginning of the PROM, at 0xbfc00000 + i*8, |
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* where i is the decimal function number. Many of these can be converted to |
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* an identical callback function. |
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* |
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* Return value is non-zero if the vector number was converted into a callback |
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* function number, otherwise 0. |
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* |
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* Vector (dec) Function |
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* 0x0 0 reset() |
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* 0x10 2 restart() |
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* 0x18 3 reinit() |
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* 0x30 6 open() |
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* 0x38 7 read() |
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* 0x58 11 lseek() |
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* 0x68 13 putchar() |
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* 0x88 17 printf() |
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* 0x108 33 getenv2() |
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*/ |
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int dec_jumptable_func(struct cpu *cpu, int vector) |
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{ |
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int i; |
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static int file_opened = 0; |
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static int current_file_offset = 0; |
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|
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switch (vector) { |
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case 0x0: /* reset() */ |
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/* TODO */ |
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cpu->machine->exit_without_entering_debugger = 1; |
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cpu->running = 0; |
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cpu->dead = 1; |
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break; |
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case 0x10: /* restart() */ |
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/* TODO */ |
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cpu->machine->exit_without_entering_debugger = 1; |
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cpu->running = 0; |
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cpu->dead = 1; |
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break; |
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case 0x18: /* reinit() */ |
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/* TODO */ |
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cpu->machine->exit_without_entering_debugger = 1; |
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cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
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break; |
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case 0x30: /* open() */ |
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/* |
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* TODO: This is just a hack to allow Sprite/pmax' bootblock |
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* code to load /vmsprite. The filename argument (in A0) |
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* is ignored, and a file handle value of 1 is returned. |
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*/ |
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if (file_opened) { |
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fatal("\ndec_jumptable_func(): opening more than one " |
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"file isn't supported yet.\n"); |
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cpu->running = 0; |
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cpu->dead = 1; |
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} |
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file_opened = 1; |
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cpu->cd.mips.gpr[MIPS_GPR_V0] = 1; |
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break; |
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case 0x38: /* read(handle, ptr, length) */ |
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cpu->cd.mips.gpr[MIPS_GPR_V0] = -1; |
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if ((int32_t)cpu->cd.mips.gpr[MIPS_GPR_A2] > 0) { |
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int disk_id = diskimage_bootdev(cpu->machine, NULL); |
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int res; |
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unsigned char *tmp_buf; |
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|
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tmp_buf = malloc(cpu->cd.mips.gpr[MIPS_GPR_A2]); |
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if (tmp_buf == NULL) { |
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fprintf(stderr, "[ *** Out of memory in " |
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"dec_prom.c, allocating %i bytes ]\n", |
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(int)cpu->cd.mips.gpr[MIPS_GPR_A2]); |
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break; |
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} |
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|
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res = diskimage_access(cpu->machine, disk_id, |
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DISKIMAGE_SCSI, 0, current_file_offset, tmp_buf, |
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cpu->cd.mips.gpr[MIPS_GPR_A2]); |
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|
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/* If the transfer was successful, transfer the data |
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to emulated memory: */ |
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if (res) { |
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uint64_t dst = cpu->cd.mips.gpr[MIPS_GPR_A1]; |
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store_buf(cpu, dst, (char *)tmp_buf, |
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cpu->cd.mips.gpr[MIPS_GPR_A2]); |
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cpu->cd.mips.gpr[MIPS_GPR_V0] = |
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cpu->cd.mips.gpr[MIPS_GPR_A2]; |
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current_file_offset += |
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cpu->cd.mips.gpr[MIPS_GPR_A2]; |
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} |
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|
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free(tmp_buf); |
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} |
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break; |
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case 0x58: /* lseek(handle, offset[, whence]) */ |
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/* TODO */ |
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if (cpu->cd.mips.gpr[MIPS_GPR_A2] == 0) |
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current_file_offset = cpu->cd.mips.gpr[MIPS_GPR_A1]; |
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else |
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fatal("WARNING! Unimplemented whence in " |
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"dec_jumptable_func()\n"); |
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cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
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break; |
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case 0x68: /* putchar() */ |
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console_putchar(cpu->machine->main_console_handle, |
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cpu->cd.mips.gpr[MIPS_GPR_A0]); |
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break; |
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case 0x88: /* printf() */ |
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return 0x30; |
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case 0x108: /* getenv2() */ |
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return 0x64; |
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default: |
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cpu_register_dump(cpu->machine, cpu, 1, 0x1); |
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printf("a0 points to: "); |
187 |
for (i=0; i<40; i++) { |
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unsigned char ch = '\0'; |
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cpu->memory_rw(cpu, cpu->mem, |
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cpu->cd.mips.gpr[MIPS_GPR_A0] + i, &ch, |
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sizeof(ch), MEM_READ, CACHE_DATA | NO_EXCEPTIONS); |
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if (ch >= ' ' && ch < 126) |
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printf("%c", ch); |
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else |
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printf("[%02x]", ch); |
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} |
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printf("\n"); |
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fatal("PROM emulation: unimplemented JUMP TABLE vector " |
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"0x%x (decimal function %i)\n", vector, vector/8); |
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cpu->running = 0; |
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cpu->dead = 1; |
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} |
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|
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return 0; |
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} |
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|
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|
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/* |
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* decstation_prom_emul(): |
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* |
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* DECstation PROM emulation. |
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* |
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* Callback functions: |
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* 0x0c strcmp() |
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* 0x14 strlen() |
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* 0x24 getchar() |
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* 0x28 gets() |
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* 0x2c puts() |
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* 0x30 printf() |
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* 0x38 iopoll() |
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* 0x54 bootinit() |
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* 0x58 bootread() |
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* 0x64 getenv() |
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* 0x6c slot_address() |
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* 0x70 wbflush() |
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* 0x7c clear_cache() |
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* 0x80 getsysid() |
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* 0x84 getbitmap() |
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* 0x88 disableintr() |
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* 0x8c enableintr() |
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* 0x9c halt() |
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* 0xa4 gettcinfo() |
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* 0xa8 execute_cmd() |
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* 0xac rex() |
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*/ |
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int decstation_prom_emul(struct cpu *cpu) |
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{ |
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int i, j, ch, argreg, argdata; |
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int vector = cpu->pc & 0xfff; |
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int callback = (cpu->pc & 0xf000)? 1 : 0; |
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unsigned char buf[100]; |
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unsigned char ch1, ch2, ch3; |
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uint64_t tmpaddr, slot_base = 0x10000000, slot_size = 0; |
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|
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if (!callback) { |
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vector = dec_jumptable_func(cpu, vector); |
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if (vector == 0) |
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return 1; |
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} else { |
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/* Vector number is n*4, PC points to n*8. */ |
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vector /= 2; |
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} |
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|
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switch (vector) { |
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case 0x0c: /* strcmp(): */ |
256 |
i = j = 0; |
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do { |
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ch1 = mem_readchar(cpu, MIPS_GPR_A0, i++); |
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ch2 = mem_readchar(cpu, MIPS_GPR_A1, j++); |
260 |
} while (ch1 == ch2 && ch1 != '\0'); |
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|
262 |
/* If ch1=='\0', then strings are equal. */ |
263 |
if (ch1 == '\0') |
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cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
265 |
if ((signed char)ch1 > (signed char)ch2) |
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cpu->cd.mips.gpr[MIPS_GPR_V0] = 1; |
267 |
if ((signed char)ch1 < (signed char)ch2) |
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cpu->cd.mips.gpr[MIPS_GPR_V0] = -1; |
269 |
break; |
270 |
case 0x14: /* strlen(): */ |
271 |
i = 0; |
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do { |
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ch2 = mem_readchar(cpu, MIPS_GPR_A0, i++); |
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} while (ch2 != 0); |
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cpu->cd.mips.gpr[MIPS_GPR_V0] = i - 1; |
276 |
break; |
277 |
case 0x24: /* getchar() */ |
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/* debug("[ DEC PROM getchar() ]\n"); */ |
279 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = console_readchar( |
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cpu->machine->main_console_handle); |
281 |
break; |
282 |
case 0x28: /* gets() */ |
283 |
/* debug("[ DEC PROM gets() ]\n"); */ |
284 |
tmpaddr = cpu->cd.mips.gpr[MIPS_GPR_A0]; |
285 |
i = 0; |
286 |
|
287 |
/* TODO: Make this not hang (block) the entire emulator */ |
288 |
|
289 |
do { |
290 |
while ((ch = console_readchar( |
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cpu->machine->main_console_handle)) < 1) |
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; |
293 |
if (ch == '\r') |
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ch = '\n'; |
295 |
ch2 = ch; |
296 |
|
297 |
if (ch == '\b') { |
298 |
if (i > 0) { |
299 |
console_putchar(cpu->machine-> |
300 |
main_console_handle, ch2); |
301 |
console_putchar(cpu->machine-> |
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main_console_handle, ' '); |
303 |
console_putchar(cpu->machine-> |
304 |
main_console_handle, ch2); |
305 |
} |
306 |
} else |
307 |
console_putchar(cpu->machine-> |
308 |
main_console_handle, ch2); |
309 |
|
310 |
fflush(stdout); |
311 |
|
312 |
if (ch == '\n') { |
313 |
/* It seems that trailing newlines |
314 |
are not included in the buffer. */ |
315 |
} else if (ch != '\b') { |
316 |
cpu->memory_rw(cpu, cpu->mem, |
317 |
cpu->cd.mips.gpr[MIPS_GPR_A0] + i, |
318 |
&ch2, sizeof(ch2), MEM_WRITE, |
319 |
CACHE_DATA | NO_EXCEPTIONS); |
320 |
i++; |
321 |
} else { |
322 |
if (i > 0) |
323 |
i--; |
324 |
} |
325 |
} while (ch2 != '\n'); |
326 |
|
327 |
/* Trailing nul-byte: */ |
328 |
ch2 = '\0'; |
329 |
cpu->memory_rw(cpu, cpu->mem, cpu->cd.mips.gpr[MIPS_GPR_A0] + |
330 |
i, &ch2, sizeof(ch2), MEM_WRITE, |
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CACHE_DATA | NO_EXCEPTIONS); |
332 |
|
333 |
/* Return the input argument: */ |
334 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = cpu->cd.mips.gpr[MIPS_GPR_A0]; |
335 |
break; |
336 |
case 0x2c: /* puts() */ |
337 |
i = 0; |
338 |
while ((ch = mem_readchar(cpu, MIPS_GPR_A0, i++)) != '\0') |
339 |
console_putchar(cpu->machine->main_console_handle, ch); |
340 |
console_putchar(cpu->machine->main_console_handle, '\n'); |
341 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
342 |
break; |
343 |
case 0x30: /* printf() */ |
344 |
if (cpu->machine->register_dump || |
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cpu->machine->instruction_trace) |
346 |
debug("PROM printf(0x%08lx): \n", |
347 |
(long)cpu->cd.mips.gpr[MIPS_GPR_A0]); |
348 |
|
349 |
i = 0; ch = -1; argreg = MIPS_GPR_A1; |
350 |
while (ch != '\0') { |
351 |
char printfbuf[8000]; |
352 |
int x; |
353 |
|
354 |
printfbuf[0] = printfbuf[sizeof(printfbuf)-1] = '\0'; |
355 |
|
356 |
ch = mem_readchar(cpu, MIPS_GPR_A0, i++); |
357 |
switch (ch) { |
358 |
case '%': |
359 |
ch = '0'; |
360 |
while (ch >= '0' && ch <= '9') |
361 |
ch = mem_readchar(cpu, |
362 |
MIPS_GPR_A0, i++); |
363 |
|
364 |
switch (ch) { |
365 |
case '%': |
366 |
strlcpy(printfbuf, "%%", |
367 |
sizeof(printfbuf)); |
368 |
break; |
369 |
case 'c': |
370 |
case 'd': |
371 |
case 's': |
372 |
case 'x': |
373 |
/* Get argument: */ |
374 |
if (argreg > MIPS_GPR_A3) { |
375 |
#if 1 |
376 |
/* Linux booters seem to go |
377 |
over the edge sometimes: */ |
378 |
ch = '\0'; |
379 |
strlcpy(printfbuf, "[...]\n", |
380 |
sizeof(printfbuf)); |
381 |
#else |
382 |
printf("[ decstation_prom_emul" |
383 |
"(): too many arguments ]"); |
384 |
/* This reuses the last arg, |
385 |
which is utterly incorrect. |
386 |
(TODO) */ |
387 |
argreg = MIPS_GPR_A3; |
388 |
#endif |
389 |
} |
390 |
|
391 |
ch2 = argdata = |
392 |
cpu->cd.mips.gpr[argreg]; |
393 |
|
394 |
switch (ch) { |
395 |
case 'c': |
396 |
snprintf(printfbuf, sizeof( |
397 |
printfbuf), "%c", ch2); |
398 |
break; |
399 |
case 'd': |
400 |
snprintf(printfbuf, sizeof( |
401 |
printfbuf), "%d", argdata); |
402 |
break; |
403 |
case 'x': |
404 |
snprintf(printfbuf, sizeof( |
405 |
printfbuf), "%x", argdata); |
406 |
break; |
407 |
case 's': |
408 |
/* Print a "%s" string. */ |
409 |
j = 0; ch3 = '\n'; |
410 |
while (ch2) { |
411 |
ch2 = mem_readchar(cpu, |
412 |
argreg, j++); |
413 |
if (ch2) { |
414 |
snprintf( |
415 |
printfbuf + |
416 |
strlen( |
417 |
printfbuf), |
418 |
sizeof( |
419 |
printfbuf)- |
420 |
1-strlen( |
421 |
printfbuf), |
422 |
"%c", ch2); |
423 |
ch3 = ch2; |
424 |
} |
425 |
} |
426 |
break; |
427 |
} |
428 |
argreg ++; |
429 |
break; |
430 |
default: |
431 |
printf("[ unknown printf format char" |
432 |
" '%c' ]", ch); |
433 |
} |
434 |
break; |
435 |
case '\0': |
436 |
break; |
437 |
default: |
438 |
snprintf(printfbuf, sizeof(printfbuf), |
439 |
"%c", ch); |
440 |
} |
441 |
|
442 |
printfbuf[sizeof(printfbuf)-1] = '\0'; |
443 |
|
444 |
for (x=0; x<strlen(printfbuf); x++) |
445 |
console_putchar(cpu->machine-> |
446 |
main_console_handle, printfbuf[x]); |
447 |
} |
448 |
if (cpu->machine->register_dump || |
449 |
cpu->machine->instruction_trace) |
450 |
debug("\n"); |
451 |
fflush(stdout); |
452 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
453 |
break; |
454 |
case 0x54: /* bootinit() */ |
455 |
/* debug("[ DEC PROM bootinit(0x%08x): TODO ]\n", |
456 |
(int)cpu->cd.mips.gpr[MIPS_GPR_A0]); */ |
457 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
458 |
break; |
459 |
case 0x58: /* bootread(int b, void *buffer, int n) */ |
460 |
/* |
461 |
* Read data from the boot device. |
462 |
* b is a sector number (512 bytes per sector), |
463 |
* buffer is the destination address, and n |
464 |
* is the number of _bytes_ to read. |
465 |
* |
466 |
* TODO: Return value? NetBSD thinks that 0 is ok. |
467 |
*/ |
468 |
debug("[ DEC PROM bootread(0x%x, 0x%08x, 0x%x) ]\n", |
469 |
(int)cpu->cd.mips.gpr[MIPS_GPR_A0], |
470 |
(int)cpu->cd.mips.gpr[MIPS_GPR_A1], |
471 |
(int)cpu->cd.mips.gpr[MIPS_GPR_A2]); |
472 |
|
473 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
474 |
|
475 |
if ((int32_t)cpu->cd.mips.gpr[MIPS_GPR_A2] > 0) { |
476 |
int disk_id = diskimage_bootdev(cpu->machine, NULL); |
477 |
int res; |
478 |
unsigned char *tmp_buf; |
479 |
|
480 |
tmp_buf = malloc(cpu->cd.mips.gpr[MIPS_GPR_A2]); |
481 |
if (tmp_buf == NULL) { |
482 |
fprintf(stderr, "[ *** Out of memory in " |
483 |
"dec_prom.c, allocating %i bytes ]\n", |
484 |
(int)cpu->cd.mips.gpr[MIPS_GPR_A2]); |
485 |
break; |
486 |
} |
487 |
|
488 |
res = diskimage_access(cpu->machine, disk_id, |
489 |
DISKIMAGE_SCSI, 0, |
490 |
cpu->cd.mips.gpr[MIPS_GPR_A0] * 512, tmp_buf, |
491 |
cpu->cd.mips.gpr[MIPS_GPR_A2]); |
492 |
|
493 |
/* If the transfer was successful, transfer the data |
494 |
to emulated memory: */ |
495 |
if (res) { |
496 |
uint64_t dst = cpu->cd.mips.gpr[MIPS_GPR_A1]; |
497 |
if (dst < 0x80000000ULL) |
498 |
dst |= 0x80000000; |
499 |
|
500 |
store_buf(cpu, dst, (char *)tmp_buf, |
501 |
cpu->cd.mips.gpr[MIPS_GPR_A2]); |
502 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = |
503 |
cpu->cd.mips.gpr[MIPS_GPR_A2]; |
504 |
} |
505 |
|
506 |
free(tmp_buf); |
507 |
} |
508 |
break; |
509 |
case 0x64: /* getenv() */ |
510 |
/* Find the environment variable given by a0: */ |
511 |
for (i=0; i<sizeof(buf); i++) |
512 |
cpu->memory_rw(cpu, cpu->mem, |
513 |
cpu->cd.mips.gpr[MIPS_GPR_A0] + i, &buf[i], |
514 |
sizeof(char), MEM_READ, CACHE_DATA | NO_EXCEPTIONS); |
515 |
buf[sizeof(buf)-1] = '\0'; |
516 |
debug("[ DEC PROM getenv(\"%s\") ]\n", buf); |
517 |
for (i=0; i<0x1000; i++) { |
518 |
/* Matching string at offset i? */ |
519 |
int nmatches = 0; |
520 |
for (j=0; j<strlen((char *)buf); j++) { |
521 |
cpu->memory_rw(cpu, cpu->mem, (uint64_t) |
522 |
(DEC_PROM_STRINGS + i + j), &ch2, |
523 |
sizeof(char), MEM_READ, CACHE_DATA | |
524 |
NO_EXCEPTIONS); |
525 |
if (ch2 == buf[j]) |
526 |
nmatches++; |
527 |
} |
528 |
cpu->memory_rw(cpu, cpu->mem, |
529 |
(uint64_t)(DEC_PROM_STRINGS |
530 |
+ i + strlen((char *)buf)), &ch2, sizeof(char), |
531 |
MEM_READ, CACHE_DATA | NO_EXCEPTIONS); |
532 |
if (nmatches == strlen((char *)buf) && ch2 == '=') { |
533 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = |
534 |
DEC_PROM_STRINGS + i + |
535 |
strlen((char *)buf) + 1; |
536 |
return 1; |
537 |
} |
538 |
} |
539 |
/* Return NULL if string wasn't found. */ |
540 |
fatal("[ DEC PROM getenv(\"%s\"): WARNING: Not in " |
541 |
"environment! ]\n", buf); |
542 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
543 |
break; |
544 |
case 0x6c: /* ulong slot_address(int sn) */ |
545 |
debug("[ DEC PROM slot_address(%i) ]\n", |
546 |
(int)cpu->cd.mips.gpr[MIPS_GPR_A0]); |
547 |
/* TODO: This is too hardcoded. */ |
548 |
/* TODO 2: Should these be physical or virtual addresses? */ |
549 |
switch (cpu->machine->machine_subtype) { |
550 |
case MACHINE_DEC_3MAX_5000: |
551 |
slot_base = KN02_PHYS_TC_0_START;/* 0x1e000000 */ |
552 |
slot_size = 4*1048576; /* 4 MB */ |
553 |
break; |
554 |
case MACHINE_DEC_3MIN_5000: |
555 |
slot_base = 0x10000000; |
556 |
slot_size = 0x4000000; /* 64 MB */ |
557 |
break; |
558 |
case MACHINE_DEC_3MAXPLUS_5000: |
559 |
slot_base = 0x1e000000; |
560 |
slot_size = 0x800000; /* 8 MB */ |
561 |
break; |
562 |
case MACHINE_DEC_MAXINE_5000: |
563 |
slot_base = 0x10000000; |
564 |
slot_size = 0x4000000; /* 64 MB */ |
565 |
break; |
566 |
default: |
567 |
fatal("warning: DEC PROM slot_address() " |
568 |
"unimplemented for this machine type\n"); |
569 |
} |
570 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = (int64_t)(int32_t) |
571 |
(0x80000000 + slot_base + slot_size * |
572 |
cpu->cd.mips.gpr[MIPS_GPR_A0]); |
573 |
break; |
574 |
case 0x70: /* wbflush() */ |
575 |
debug("[ DEC PROM wbflush(): TODO ]\n"); |
576 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
577 |
break; |
578 |
case 0x7c: /* clear_cache(addr, len) */ |
579 |
debug("[ DEC PROM clear_cache(0x%x,%i) ]\n", |
580 |
(uint32_t)cpu->cd.mips.gpr[MIPS_GPR_A0], |
581 |
(int)cpu->cd.mips.gpr[MIPS_GPR_A1]); |
582 |
/* TODO */ |
583 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; /* ? */ |
584 |
break; |
585 |
case 0x80: /* getsysid() */ |
586 |
/* debug("[ DEC PROM getsysid() ]\n"); */ |
587 |
/* TODO: why did I add the 0x82 stuff??? */ |
588 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = ((uint32_t)0x82 << 24) |
589 |
+ (cpu->machine->machine_subtype << 16) + (0x3 << 8); |
590 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = |
591 |
(int64_t)(int32_t)cpu->cd.mips.gpr[MIPS_GPR_V0]; |
592 |
break; |
593 |
case 0x84: /* getbitmap() */ |
594 |
debug("[ DEC PROM getbitmap(0x%08x) ]\n", |
595 |
(int)cpu->cd.mips.gpr[MIPS_GPR_A0]); |
596 |
store_buf(cpu, cpu->cd.mips.gpr[MIPS_GPR_A0], |
597 |
(char *)&memmap, sizeof(memmap)); |
598 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = sizeof((memmap.bitmap)); |
599 |
break; |
600 |
case 0x88: /* disableintr() */ |
601 |
debug("[ DEC PROM disableintr(): TODO ]\n"); |
602 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
603 |
break; |
604 |
case 0x8c: /* enableintr() */ |
605 |
debug("[ DEC PROM enableintr(): TODO ]\n"); |
606 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
607 |
break; |
608 |
case 0x9c: /* halt() */ |
609 |
debug("[ DEC PROM halt() ]\n"); |
610 |
cpu->machine->exit_without_entering_debugger = 1; |
611 |
cpu->running = 0; |
612 |
cpu->dead = 1; |
613 |
break; |
614 |
case 0xa4: /* gettcinfo() */ |
615 |
/* |
616 |
* These are just bogus values... TODO |
617 |
* |
618 |
* 0: revision |
619 |
* 4: clock period in nano seconds |
620 |
* 8: slot size in megabytes TODO: not same for all models! |
621 |
* 12: I/O timeout in cycles |
622 |
* 16: DMA address range in megabytes |
623 |
* 20: maximum DMA burst length |
624 |
* 24: turbochannel parity (yes = 1) |
625 |
* 28: reserved |
626 |
*/ |
627 |
store_32bit_word(cpu, DEC_PROM_TCINFO + 0, 0); |
628 |
store_32bit_word(cpu, DEC_PROM_TCINFO + 4, 50); |
629 |
store_32bit_word(cpu, DEC_PROM_TCINFO + 8, 4); |
630 |
store_32bit_word(cpu, DEC_PROM_TCINFO + 12, 10); |
631 |
store_32bit_word(cpu, DEC_PROM_TCINFO + 16, 1); |
632 |
store_32bit_word(cpu, DEC_PROM_TCINFO + 20, 100); |
633 |
store_32bit_word(cpu, DEC_PROM_TCINFO + 24, 0); |
634 |
store_32bit_word(cpu, DEC_PROM_TCINFO + 28, 0); |
635 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = DEC_PROM_TCINFO; |
636 |
break; |
637 |
case 0xa8: /* int execute_cmd(char *) */ |
638 |
i = 0; |
639 |
while ((ch = mem_readchar(cpu, MIPS_GPR_A0, i++)) != '\0') |
640 |
console_putchar(cpu->machine->main_console_handle, ch); |
641 |
console_putchar(cpu->machine->main_console_handle, '\n'); |
642 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
643 |
break; |
644 |
case 0xac: /* rex() */ |
645 |
debug("[ DEC PROM rex('%c') ]\n", |
646 |
(int)cpu->cd.mips.gpr[MIPS_GPR_A0]); |
647 |
switch (cpu->cd.mips.gpr[MIPS_GPR_A0]) { |
648 |
case 'h': |
649 |
debug("DEC PROM: rex('h') ==> halt\n"); |
650 |
cpu->machine->exit_without_entering_debugger = 1; |
651 |
cpu->running = 0; |
652 |
cpu->dead = 1; |
653 |
break; |
654 |
case 'b': |
655 |
debug("DEC PROM: rex('b') ==> reboot: TODO " |
656 |
"(halting CPU instead)\n"); |
657 |
cpu->machine->exit_without_entering_debugger = 1; |
658 |
cpu->running = 0; |
659 |
cpu->dead = 1; |
660 |
break; |
661 |
default: |
662 |
fatal("DEC prom emulation: unknown rex() a0=0x%llx (" |
663 |
"'%c')\n", (long long)cpu->cd.mips.gpr[MIPS_GPR_A0], |
664 |
(char)cpu->cd.mips.gpr[MIPS_GPR_A0]); |
665 |
cpu->running = 0; |
666 |
cpu->dead = 1; |
667 |
} |
668 |
break; |
669 |
default: |
670 |
cpu_register_dump(cpu->machine, cpu, 1, 0x1); |
671 |
printf("a0 points to: "); |
672 |
for (i=0; i<40; i++) { |
673 |
unsigned char ch = '\0'; |
674 |
cpu->memory_rw(cpu, cpu->mem, |
675 |
cpu->cd.mips.gpr[MIPS_GPR_A0] + i, &ch, |
676 |
sizeof(ch), MEM_READ, CACHE_DATA | NO_EXCEPTIONS); |
677 |
if (ch >= ' ' && ch < 126) |
678 |
printf("%c", ch); |
679 |
else |
680 |
printf("[%02x]", ch); |
681 |
} |
682 |
printf("\n"); |
683 |
fatal("PROM emulation: unimplemented callback vector 0x%x\n", |
684 |
vector); |
685 |
cpu->running = 0; |
686 |
cpu->dead = 1; |
687 |
} |
688 |
|
689 |
return 1; |
690 |
} |
691 |
|