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dpavlin |
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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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dpavlin |
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* $Id: dec_prom.c,v 1.58 2005/05/15 01:55:49 debug Exp $ |
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dpavlin |
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* |
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* DECstation PROM emulation. |
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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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#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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#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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extern int quiet_mode; |
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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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* 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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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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dpavlin |
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int disk_id = diskimage_bootdev(cpu->machine, NULL); |
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dpavlin |
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int res; |
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unsigned char *tmp_buf; |
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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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dpavlin |
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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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dpavlin |
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cpu->cd.mips.gpr[MIPS_GPR_A2]); |
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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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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: "); |
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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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return 0; |
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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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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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switch (vector) { |
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case 0x0c: /* strcmp(): */ |
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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++); |
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} while (ch1 == ch2 && ch1 != '\0'); |
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/* If ch1=='\0', then strings are equal. */ |
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if (ch1 == '\0') |
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cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
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if ((signed char)ch1 > (signed char)ch2) |
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cpu->cd.mips.gpr[MIPS_GPR_V0] = 1; |
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if ((signed char)ch1 < (signed char)ch2) |
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cpu->cd.mips.gpr[MIPS_GPR_V0] = -1; |
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break; |
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case 0x14: /* strlen(): */ |
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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; |
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break; |
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case 0x24: /* getchar() */ |
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/* debug("[ DEC PROM getchar() ]\n"); */ |
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cpu->cd.mips.gpr[MIPS_GPR_V0] = console_readchar( |
| 280 |
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cpu->machine->main_console_handle); |
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break; |
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case 0x28: /* gets() */ |
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/* debug("[ DEC PROM gets() ]\n"); */ |
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tmpaddr = cpu->cd.mips.gpr[MIPS_GPR_A0]; |
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i = 0; |
| 286 |
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| 287 |
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/* TODO: Make this not hang (block) the entire emulator */ |
| 288 |
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| 289 |
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do { |
| 290 |
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while ((ch = console_readchar( |
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cpu->machine->main_console_handle)) < 1) |
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; |
| 293 |
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if (ch == '\r') |
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ch = '\n'; |
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ch2 = ch; |
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| 297 |
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if (ch == '\b') { |
| 298 |
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if (i > 0) { |
| 299 |
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console_putchar(cpu->machine-> |
| 300 |
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main_console_handle, ch2); |
| 301 |
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console_putchar(cpu->machine-> |
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main_console_handle, ' '); |
| 303 |
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console_putchar(cpu->machine-> |
| 304 |
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main_console_handle, ch2); |
| 305 |
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} |
| 306 |
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} else |
| 307 |
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console_putchar(cpu->machine-> |
| 308 |
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main_console_handle, ch2); |
| 309 |
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| 310 |
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fflush(stdout); |
| 311 |
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| 312 |
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if (ch == '\n') { |
| 313 |
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/* It seems that trailing newlines |
| 314 |
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are not included in the buffer. */ |
| 315 |
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} else if (ch != '\b') { |
| 316 |
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cpu->memory_rw(cpu, cpu->mem, |
| 317 |
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cpu->cd.mips.gpr[MIPS_GPR_A0] + i, |
| 318 |
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&ch2, sizeof(ch2), MEM_WRITE, |
| 319 |
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CACHE_DATA | NO_EXCEPTIONS); |
| 320 |
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i++; |
| 321 |
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} else { |
| 322 |
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if (i > 0) |
| 323 |
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i--; |
| 324 |
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} |
| 325 |
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} while (ch2 != '\n'); |
| 326 |
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| 327 |
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/* Trailing nul-byte: */ |
| 328 |
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ch2 = '\0'; |
| 329 |
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cpu->memory_rw(cpu, cpu->mem, cpu->cd.mips.gpr[MIPS_GPR_A0] + |
| 330 |
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i, &ch2, sizeof(ch2), MEM_WRITE, |
| 331 |
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CACHE_DATA | NO_EXCEPTIONS); |
| 332 |
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| 333 |
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/* Return the input argument: */ |
| 334 |
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cpu->cd.mips.gpr[MIPS_GPR_V0] = cpu->cd.mips.gpr[MIPS_GPR_A0]; |
| 335 |
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break; |
| 336 |
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case 0x2c: /* puts() */ |
| 337 |
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i = 0; |
| 338 |
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while ((ch = mem_readchar(cpu, MIPS_GPR_A0, i++)) != '\0') |
| 339 |
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console_putchar(cpu->machine->main_console_handle, ch); |
| 340 |
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console_putchar(cpu->machine->main_console_handle, '\n'); |
| 341 |
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cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
| 342 |
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break; |
| 343 |
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case 0x30: /* printf() */ |
| 344 |
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if (cpu->machine->register_dump || |
| 345 |
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cpu->machine->instruction_trace) |
| 346 |
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debug("PROM printf(0x%08lx): \n", |
| 347 |
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(long)cpu->cd.mips.gpr[MIPS_GPR_A0]); |
| 348 |
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| 349 |
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i = 0; ch = -1; argreg = MIPS_GPR_A1; |
| 350 |
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while (ch != '\0') { |
| 351 |
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char printfbuf[8000]; |
| 352 |
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int x; |
| 353 |
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| 354 |
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printfbuf[0] = printfbuf[sizeof(printfbuf)-1] = '\0'; |
| 355 |
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| 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 |
|
|
strcpy(printfbuf, "%%"); |
| 367 |
|
|
break; |
| 368 |
|
|
case 'c': |
| 369 |
|
|
case 'd': |
| 370 |
|
|
case 's': |
| 371 |
|
|
case 'x': |
| 372 |
|
|
/* Get argument: */ |
| 373 |
|
|
if (argreg > MIPS_GPR_A3) { |
| 374 |
|
|
#if 1 |
| 375 |
|
|
/* Linux booters seem to go |
| 376 |
|
|
over the edge sometimes: */ |
| 377 |
|
|
ch = '\0'; |
| 378 |
|
|
strcpy(printfbuf, "[...]\n"); |
| 379 |
|
|
#else |
| 380 |
|
|
printf("[ decstation_prom_emul" |
| 381 |
|
|
"(): too many arguments ]"); |
| 382 |
|
|
/* This reuses the last arg, |
| 383 |
|
|
which is utterly incorrect. |
| 384 |
|
|
(TODO) */ |
| 385 |
|
|
argreg = MIPS_GPR_A3; |
| 386 |
|
|
#endif |
| 387 |
|
|
} |
| 388 |
|
|
|
| 389 |
|
|
ch2 = argdata = |
| 390 |
|
|
cpu->cd.mips.gpr[argreg]; |
| 391 |
|
|
|
| 392 |
|
|
switch (ch) { |
| 393 |
|
|
case 'c': |
| 394 |
|
|
sprintf(printfbuf, "%c", ch2); |
| 395 |
|
|
break; |
| 396 |
|
|
case 'd': |
| 397 |
|
|
sprintf(printfbuf, "%d", |
| 398 |
|
|
argdata); |
| 399 |
|
|
break; |
| 400 |
|
|
case 'x': |
| 401 |
|
|
sprintf(printfbuf, "%x", |
| 402 |
|
|
argdata); |
| 403 |
|
|
break; |
| 404 |
|
|
case 's': |
| 405 |
|
|
/* Print a "%s" string. */ |
| 406 |
|
|
j = 0; ch3 = '\n'; |
| 407 |
|
|
while (ch2) { |
| 408 |
|
|
ch2 = mem_readchar(cpu, |
| 409 |
|
|
argreg, j++); |
| 410 |
|
|
if (ch2) { |
| 411 |
|
|
snprintf( |
| 412 |
|
|
printfbuf + |
| 413 |
|
|
strlen( |
| 414 |
|
|
printfbuf), |
| 415 |
|
|
sizeof( |
| 416 |
|
|
printfbuf)- |
| 417 |
|
|
1-strlen( |
| 418 |
|
|
printfbuf), |
| 419 |
|
|
"%c", ch2); |
| 420 |
|
|
ch3 = ch2; |
| 421 |
|
|
} |
| 422 |
|
|
} |
| 423 |
|
|
break; |
| 424 |
|
|
} |
| 425 |
|
|
argreg ++; |
| 426 |
|
|
break; |
| 427 |
|
|
default: |
| 428 |
|
|
printf("[ unknown printf format char" |
| 429 |
|
|
" '%c' ]", ch); |
| 430 |
|
|
} |
| 431 |
|
|
break; |
| 432 |
|
|
case '\0': |
| 433 |
|
|
break; |
| 434 |
|
|
default: |
| 435 |
|
|
sprintf(printfbuf, "%c", ch); |
| 436 |
|
|
} |
| 437 |
|
|
|
| 438 |
|
|
printfbuf[sizeof(printfbuf)-1] = '\0'; |
| 439 |
|
|
|
| 440 |
|
|
for (x=0; x<strlen(printfbuf); x++) |
| 441 |
|
|
console_putchar(cpu->machine-> |
| 442 |
|
|
main_console_handle, printfbuf[x]); |
| 443 |
|
|
} |
| 444 |
|
|
if (cpu->machine->register_dump || |
| 445 |
|
|
cpu->machine->instruction_trace) |
| 446 |
|
|
debug("\n"); |
| 447 |
|
|
fflush(stdout); |
| 448 |
|
|
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
| 449 |
|
|
break; |
| 450 |
|
|
case 0x54: /* bootinit() */ |
| 451 |
|
|
/* debug("[ DEC PROM bootinit(0x%08x): TODO ]\n", |
| 452 |
|
|
(int)cpu->cd.mips.gpr[MIPS_GPR_A0]); */ |
| 453 |
|
|
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
| 454 |
|
|
break; |
| 455 |
|
|
case 0x58: /* bootread(int b, void *buffer, int n) */ |
| 456 |
|
|
/* |
| 457 |
|
|
* Read data from the boot device. |
| 458 |
|
|
* b is a sector number (512 bytes per sector), |
| 459 |
|
|
* buffer is the destination address, and n |
| 460 |
|
|
* is the number of _bytes_ to read. |
| 461 |
|
|
* |
| 462 |
|
|
* TODO: Return value? NetBSD thinks that 0 is ok. |
| 463 |
|
|
*/ |
| 464 |
|
|
debug("[ DEC PROM bootread(0x%x, 0x%08x, 0x%x) ]\n", |
| 465 |
|
|
(int)cpu->cd.mips.gpr[MIPS_GPR_A0], |
| 466 |
|
|
(int)cpu->cd.mips.gpr[MIPS_GPR_A1], |
| 467 |
|
|
(int)cpu->cd.mips.gpr[MIPS_GPR_A2]); |
| 468 |
|
|
|
| 469 |
|
|
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
| 470 |
|
|
|
| 471 |
|
|
if ((int32_t)cpu->cd.mips.gpr[MIPS_GPR_A2] > 0) { |
| 472 |
dpavlin |
6 |
int disk_id = diskimage_bootdev(cpu->machine, NULL); |
| 473 |
dpavlin |
2 |
int res; |
| 474 |
|
|
unsigned char *tmp_buf; |
| 475 |
|
|
|
| 476 |
|
|
tmp_buf = malloc(cpu->cd.mips.gpr[MIPS_GPR_A2]); |
| 477 |
|
|
if (tmp_buf == NULL) { |
| 478 |
|
|
fprintf(stderr, "[ *** Out of memory in " |
| 479 |
|
|
"dec_prom.c, allocating %i bytes ]\n", |
| 480 |
|
|
(int)cpu->cd.mips.gpr[MIPS_GPR_A2]); |
| 481 |
|
|
break; |
| 482 |
|
|
} |
| 483 |
|
|
|
| 484 |
dpavlin |
6 |
res = diskimage_access(cpu->machine, disk_id, |
| 485 |
|
|
DISKIMAGE_SCSI, 0, |
| 486 |
dpavlin |
2 |
cpu->cd.mips.gpr[MIPS_GPR_A0] * 512, tmp_buf, |
| 487 |
|
|
cpu->cd.mips.gpr[MIPS_GPR_A2]); |
| 488 |
|
|
|
| 489 |
|
|
/* If the transfer was successful, transfer the data |
| 490 |
|
|
to emulated memory: */ |
| 491 |
|
|
if (res) { |
| 492 |
|
|
uint64_t dst = cpu->cd.mips.gpr[MIPS_GPR_A1]; |
| 493 |
|
|
if (dst < 0x80000000ULL) |
| 494 |
|
|
dst |= 0x80000000; |
| 495 |
|
|
|
| 496 |
|
|
store_buf(cpu, dst, (char *)tmp_buf, |
| 497 |
|
|
cpu->cd.mips.gpr[MIPS_GPR_A2]); |
| 498 |
|
|
cpu->cd.mips.gpr[MIPS_GPR_V0] = |
| 499 |
|
|
cpu->cd.mips.gpr[MIPS_GPR_A2]; |
| 500 |
|
|
} |
| 501 |
|
|
|
| 502 |
|
|
free(tmp_buf); |
| 503 |
|
|
} |
| 504 |
|
|
break; |
| 505 |
|
|
case 0x64: /* getenv() */ |
| 506 |
|
|
/* Find the environment variable given by a0: */ |
| 507 |
|
|
for (i=0; i<sizeof(buf); i++) |
| 508 |
|
|
cpu->memory_rw(cpu, cpu->mem, |
| 509 |
|
|
cpu->cd.mips.gpr[MIPS_GPR_A0] + i, &buf[i], |
| 510 |
|
|
sizeof(char), MEM_READ, CACHE_DATA | NO_EXCEPTIONS); |
| 511 |
|
|
buf[sizeof(buf)-1] = '\0'; |
| 512 |
|
|
debug("[ DEC PROM getenv(\"%s\") ]\n", buf); |
| 513 |
|
|
for (i=0; i<0x1000; i++) { |
| 514 |
|
|
/* Matching string at offset i? */ |
| 515 |
|
|
int nmatches = 0; |
| 516 |
|
|
for (j=0; j<strlen((char *)buf); j++) { |
| 517 |
|
|
cpu->memory_rw(cpu, cpu->mem, (uint64_t) |
| 518 |
|
|
(DEC_PROM_STRINGS + i + j), &ch2, |
| 519 |
|
|
sizeof(char), MEM_READ, CACHE_DATA | |
| 520 |
|
|
NO_EXCEPTIONS); |
| 521 |
|
|
if (ch2 == buf[j]) |
| 522 |
|
|
nmatches++; |
| 523 |
|
|
} |
| 524 |
|
|
cpu->memory_rw(cpu, cpu->mem, |
| 525 |
|
|
(uint64_t)(DEC_PROM_STRINGS |
| 526 |
|
|
+ i + strlen((char *)buf)), &ch2, sizeof(char), |
| 527 |
|
|
MEM_READ, CACHE_DATA | NO_EXCEPTIONS); |
| 528 |
|
|
if (nmatches == strlen((char *)buf) && ch2 == '=') { |
| 529 |
|
|
cpu->cd.mips.gpr[MIPS_GPR_V0] = |
| 530 |
|
|
DEC_PROM_STRINGS + i + |
| 531 |
|
|
strlen((char *)buf) + 1; |
| 532 |
|
|
return 1; |
| 533 |
|
|
} |
| 534 |
|
|
} |
| 535 |
|
|
/* Return NULL if string wasn't found. */ |
| 536 |
|
|
fatal("[ DEC PROM getenv(\"%s\"): WARNING: Not in " |
| 537 |
|
|
"environment! ]\n", buf); |
| 538 |
|
|
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
| 539 |
|
|
break; |
| 540 |
|
|
case 0x6c: /* ulong slot_address(int sn) */ |
| 541 |
|
|
debug("[ DEC PROM slot_address(%i) ]\n", |
| 542 |
|
|
(int)cpu->cd.mips.gpr[MIPS_GPR_A0]); |
| 543 |
|
|
/* TODO: This is too hardcoded. */ |
| 544 |
|
|
/* TODO 2: Should these be physical or virtual addresses? */ |
| 545 |
|
|
switch (cpu->machine->machine_subtype) { |
| 546 |
|
|
case MACHINE_DEC_3MAX_5000: |
| 547 |
|
|
slot_base = KN02_PHYS_TC_0_START;/* 0x1e000000 */ |
| 548 |
|
|
slot_size = 4*1048576; /* 4 MB */ |
| 549 |
|
|
break; |
| 550 |
|
|
case MACHINE_DEC_3MIN_5000: |
| 551 |
|
|
slot_base = 0x10000000; |
| 552 |
|
|
slot_size = 0x4000000; /* 64 MB */ |
| 553 |
|
|
break; |
| 554 |
|
|
case MACHINE_DEC_3MAXPLUS_5000: |
| 555 |
|
|
slot_base = 0x1e000000; |
| 556 |
|
|
slot_size = 0x800000; /* 8 MB */ |
| 557 |
|
|
break; |
| 558 |
|
|
case MACHINE_DEC_MAXINE_5000: |
| 559 |
|
|
slot_base = 0x10000000; |
| 560 |
|
|
slot_size = 0x4000000; /* 64 MB */ |
| 561 |
|
|
break; |
| 562 |
|
|
default: |
| 563 |
|
|
fatal("warning: DEC PROM slot_address() " |
| 564 |
|
|
"unimplemented for this machine type\n"); |
| 565 |
|
|
} |
| 566 |
|
|
cpu->cd.mips.gpr[MIPS_GPR_V0] = (int64_t)(int32_t) |
| 567 |
|
|
(0x80000000 + slot_base + slot_size * |
| 568 |
|
|
cpu->cd.mips.gpr[MIPS_GPR_A0]); |
| 569 |
|
|
break; |
| 570 |
|
|
case 0x70: /* wbflush() */ |
| 571 |
|
|
debug("[ DEC PROM wbflush(): TODO ]\n"); |
| 572 |
|
|
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
| 573 |
|
|
break; |
| 574 |
|
|
case 0x7c: /* clear_cache(addr, len) */ |
| 575 |
|
|
debug("[ DEC PROM clear_cache(0x%x,%i) ]\n", |
| 576 |
|
|
(uint32_t)cpu->cd.mips.gpr[MIPS_GPR_A0], |
| 577 |
|
|
(int)cpu->cd.mips.gpr[MIPS_GPR_A1]); |
| 578 |
|
|
/* TODO */ |
| 579 |
|
|
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; /* ? */ |
| 580 |
|
|
break; |
| 581 |
|
|
case 0x80: /* getsysid() */ |
| 582 |
|
|
/* debug("[ DEC PROM getsysid() ]\n"); */ |
| 583 |
|
|
/* TODO: why did I add the 0x82 stuff??? */ |
| 584 |
|
|
cpu->cd.mips.gpr[MIPS_GPR_V0] = ((uint32_t)0x82 << 24) |
| 585 |
|
|
+ (cpu->machine->machine_subtype << 16) + (0x3 << 8); |
| 586 |
|
|
cpu->cd.mips.gpr[MIPS_GPR_V0] = |
| 587 |
|
|
(int64_t)(int32_t)cpu->cd.mips.gpr[MIPS_GPR_V0]; |
| 588 |
|
|
break; |
| 589 |
|
|
case 0x84: /* getbitmap() */ |
| 590 |
|
|
debug("[ DEC PROM getbitmap(0x%08x) ]\n", |
| 591 |
|
|
(int)cpu->cd.mips.gpr[MIPS_GPR_A0]); |
| 592 |
|
|
store_buf(cpu, cpu->cd.mips.gpr[MIPS_GPR_A0], |
| 593 |
|
|
(char *)&memmap, sizeof(memmap)); |
| 594 |
|
|
cpu->cd.mips.gpr[MIPS_GPR_V0] = sizeof((memmap.bitmap)); |
| 595 |
|
|
break; |
| 596 |
|
|
case 0x88: /* disableintr() */ |
| 597 |
|
|
debug("[ DEC PROM disableintr(): TODO ]\n"); |
| 598 |
|
|
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
| 599 |
|
|
break; |
| 600 |
|
|
case 0x8c: /* enableintr() */ |
| 601 |
|
|
debug("[ DEC PROM enableintr(): TODO ]\n"); |
| 602 |
|
|
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
| 603 |
|
|
break; |
| 604 |
|
|
case 0x9c: /* halt() */ |
| 605 |
|
|
debug("[ DEC PROM halt() ]\n"); |
| 606 |
|
|
cpu->machine->exit_without_entering_debugger = 1; |
| 607 |
|
|
cpu->running = 0; |
| 608 |
|
|
cpu->dead = 1; |
| 609 |
|
|
break; |
| 610 |
|
|
case 0xa4: /* gettcinfo() */ |
| 611 |
|
|
/* |
| 612 |
|
|
* These are just bogus values... TODO |
| 613 |
|
|
* |
| 614 |
|
|
* 0: revision |
| 615 |
|
|
* 4: clock period in nano seconds |
| 616 |
|
|
* 8: slot size in megabytes TODO: not same for all models! |
| 617 |
|
|
* 12: I/O timeout in cycles |
| 618 |
|
|
* 16: DMA address range in megabytes |
| 619 |
|
|
* 20: maximum DMA burst length |
| 620 |
|
|
* 24: turbochannel parity (yes = 1) |
| 621 |
|
|
* 28: reserved |
| 622 |
|
|
*/ |
| 623 |
|
|
store_32bit_word(cpu, DEC_PROM_TCINFO + 0, 0); |
| 624 |
|
|
store_32bit_word(cpu, DEC_PROM_TCINFO + 4, 50); |
| 625 |
|
|
store_32bit_word(cpu, DEC_PROM_TCINFO + 8, 4); |
| 626 |
|
|
store_32bit_word(cpu, DEC_PROM_TCINFO + 12, 10); |
| 627 |
|
|
store_32bit_word(cpu, DEC_PROM_TCINFO + 16, 1); |
| 628 |
|
|
store_32bit_word(cpu, DEC_PROM_TCINFO + 20, 100); |
| 629 |
|
|
store_32bit_word(cpu, DEC_PROM_TCINFO + 24, 0); |
| 630 |
|
|
store_32bit_word(cpu, DEC_PROM_TCINFO + 28, 0); |
| 631 |
|
|
cpu->cd.mips.gpr[MIPS_GPR_V0] = DEC_PROM_TCINFO; |
| 632 |
|
|
break; |
| 633 |
|
|
case 0xa8: /* int execute_cmd(char *) */ |
| 634 |
|
|
i = 0; |
| 635 |
|
|
while ((ch = mem_readchar(cpu, MIPS_GPR_A0, i++)) != '\0') |
| 636 |
|
|
console_putchar(cpu->machine->main_console_handle, ch); |
| 637 |
|
|
console_putchar(cpu->machine->main_console_handle, '\n'); |
| 638 |
|
|
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
| 639 |
|
|
break; |
| 640 |
|
|
case 0xac: /* rex() */ |
| 641 |
|
|
debug("[ DEC PROM rex('%c') ]\n", |
| 642 |
|
|
(int)cpu->cd.mips.gpr[MIPS_GPR_A0]); |
| 643 |
|
|
switch (cpu->cd.mips.gpr[MIPS_GPR_A0]) { |
| 644 |
|
|
case 'h': |
| 645 |
|
|
debug("DEC PROM: rex('h') ==> halt\n"); |
| 646 |
|
|
cpu->machine->exit_without_entering_debugger = 1; |
| 647 |
|
|
cpu->running = 0; |
| 648 |
|
|
cpu->dead = 1; |
| 649 |
|
|
break; |
| 650 |
|
|
case 'b': |
| 651 |
|
|
debug("DEC PROM: rex('b') ==> reboot: TODO " |
| 652 |
|
|
"(halting CPU instead)\n"); |
| 653 |
|
|
cpu->machine->exit_without_entering_debugger = 1; |
| 654 |
|
|
cpu->running = 0; |
| 655 |
|
|
cpu->dead = 1; |
| 656 |
|
|
break; |
| 657 |
|
|
default: |
| 658 |
|
|
fatal("DEC prom emulation: unknown rex() a0=0x%llx (" |
| 659 |
|
|
"'%c')\n", (long long)cpu->cd.mips.gpr[MIPS_GPR_A0], |
| 660 |
|
|
(char)cpu->cd.mips.gpr[MIPS_GPR_A0]); |
| 661 |
|
|
cpu->running = 0; |
| 662 |
|
|
cpu->dead = 1; |
| 663 |
|
|
} |
| 664 |
|
|
break; |
| 665 |
|
|
default: |
| 666 |
|
|
cpu_register_dump(cpu->machine, cpu, 1, 0x1); |
| 667 |
|
|
printf("a0 points to: "); |
| 668 |
|
|
for (i=0; i<40; i++) { |
| 669 |
|
|
unsigned char ch = '\0'; |
| 670 |
|
|
cpu->memory_rw(cpu, cpu->mem, |
| 671 |
|
|
cpu->cd.mips.gpr[MIPS_GPR_A0] + i, &ch, |
| 672 |
|
|
sizeof(ch), MEM_READ, CACHE_DATA | NO_EXCEPTIONS); |
| 673 |
|
|
if (ch >= ' ' && ch < 126) |
| 674 |
|
|
printf("%c", ch); |
| 675 |
|
|
else |
| 676 |
|
|
printf("[%02x]", ch); |
| 677 |
|
|
} |
| 678 |
|
|
printf("\n"); |
| 679 |
|
|
fatal("PROM emulation: unimplemented callback vector 0x%x\n", |
| 680 |
|
|
vector); |
| 681 |
|
|
cpu->running = 0; |
| 682 |
|
|
cpu->dead = 1; |
| 683 |
|
|
} |
| 684 |
|
|
|
| 685 |
|
|
return 1; |
| 686 |
|
|
} |
| 687 |
|
|
|
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