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/* |
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* Copyright (C) 2003-2006 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 1.9 2006/06/23 11:47:05 debug Exp $ |
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* |
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* DECstation PROM emulation. |
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* |
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* Implementation note: Remember that only the lowest 32 bits of GPRs are |
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* actually valid when using dyntrans with e.g. R3000 CPUs. |
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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, (int32_t)cpu->cd.mips.gpr[regbase] + |
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offset, &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: "); |
190 |
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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(int32_t)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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|
248 |
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; |
252 |
} 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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} |
256 |
|
257 |
switch (vector) { |
258 |
case 0x0c: /* strcmp(): */ |
259 |
i = j = 0; |
260 |
do { |
261 |
ch1 = mem_readchar(cpu, MIPS_GPR_A0, i++); |
262 |
ch2 = mem_readchar(cpu, MIPS_GPR_A1, j++); |
263 |
} while (ch1 == ch2 && ch1 != '\0'); |
264 |
|
265 |
/* If ch1=='\0', then strings are equal. */ |
266 |
if (ch1 == '\0') |
267 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
268 |
if ((signed char)ch1 > (signed char)ch2) |
269 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 1; |
270 |
if ((signed char)ch1 < (signed char)ch2) |
271 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = -1; |
272 |
break; |
273 |
case 0x14: /* strlen(): */ |
274 |
i = 0; |
275 |
do { |
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ch2 = mem_readchar(cpu, MIPS_GPR_A0, i++); |
277 |
} while (ch2 != 0); |
278 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = i - 1; |
279 |
break; |
280 |
case 0x24: /* getchar() */ |
281 |
/* debug("[ DEC PROM getchar() ]\n"); */ |
282 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = console_readchar( |
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cpu->machine->main_console_handle); |
284 |
break; |
285 |
case 0x28: /* gets() */ |
286 |
/* debug("[ DEC PROM gets() ]\n"); */ |
287 |
tmpaddr = cpu->cd.mips.gpr[MIPS_GPR_A0]; |
288 |
i = 0; |
289 |
|
290 |
/* TODO: Make this not hang (block) the entire emulator */ |
291 |
|
292 |
do { |
293 |
while ((ch = console_readchar( |
294 |
cpu->machine->main_console_handle)) < 1) |
295 |
; |
296 |
if (ch == '\r') |
297 |
ch = '\n'; |
298 |
ch2 = ch; |
299 |
|
300 |
if (ch == '\b') { |
301 |
if (i > 0) { |
302 |
console_putchar(cpu->machine-> |
303 |
main_console_handle, ch2); |
304 |
console_putchar(cpu->machine-> |
305 |
main_console_handle, ' '); |
306 |
console_putchar(cpu->machine-> |
307 |
main_console_handle, ch2); |
308 |
} |
309 |
} else |
310 |
console_putchar(cpu->machine-> |
311 |
main_console_handle, ch2); |
312 |
|
313 |
fflush(stdout); |
314 |
|
315 |
if (ch == '\n') { |
316 |
/* It seems that trailing newlines |
317 |
are not included in the buffer. */ |
318 |
} else if (ch != '\b') { |
319 |
cpu->memory_rw(cpu, cpu->mem, (int32_t) |
320 |
cpu->cd.mips.gpr[MIPS_GPR_A0] + i, |
321 |
&ch2, sizeof(ch2), MEM_WRITE, |
322 |
CACHE_DATA | NO_EXCEPTIONS); |
323 |
i++; |
324 |
} else { |
325 |
if (i > 0) |
326 |
i--; |
327 |
} |
328 |
} while (ch2 != '\n'); |
329 |
|
330 |
/* Trailing nul-byte: */ |
331 |
ch2 = '\0'; |
332 |
cpu->memory_rw(cpu, cpu->mem, (int32_t) |
333 |
cpu->cd.mips.gpr[MIPS_GPR_A0] + i, &ch2, sizeof(ch2), |
334 |
MEM_WRITE, CACHE_DATA | NO_EXCEPTIONS); |
335 |
|
336 |
/* Return the input argument: */ |
337 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = cpu->cd.mips.gpr[MIPS_GPR_A0]; |
338 |
break; |
339 |
case 0x2c: /* puts() */ |
340 |
i = 0; |
341 |
while ((ch = mem_readchar(cpu, MIPS_GPR_A0, i++)) != '\0') |
342 |
console_putchar(cpu->machine->main_console_handle, ch); |
343 |
console_putchar(cpu->machine->main_console_handle, '\n'); |
344 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
345 |
break; |
346 |
case 0x30: /* printf() */ |
347 |
if (cpu->machine->register_dump || |
348 |
cpu->machine->instruction_trace) |
349 |
debug("PROM printf(0x%08lx): \n", |
350 |
(long)cpu->cd.mips.gpr[MIPS_GPR_A0]); |
351 |
|
352 |
i = 0; ch = -1; argreg = MIPS_GPR_A1; |
353 |
while (ch != '\0') { |
354 |
char printfbuf[8000]; |
355 |
size_t x; |
356 |
|
357 |
printfbuf[0] = printfbuf[sizeof(printfbuf)-1] = '\0'; |
358 |
|
359 |
ch = mem_readchar(cpu, MIPS_GPR_A0, i++); |
360 |
switch (ch) { |
361 |
case '%': |
362 |
ch = '0'; |
363 |
while (ch >= '0' && ch <= '9') |
364 |
ch = mem_readchar(cpu, |
365 |
MIPS_GPR_A0, i++); |
366 |
|
367 |
switch (ch) { |
368 |
case '%': |
369 |
strlcpy(printfbuf, "%%", |
370 |
sizeof(printfbuf)); |
371 |
break; |
372 |
case 'c': |
373 |
case 'd': |
374 |
case 's': |
375 |
case 'x': |
376 |
/* Get argument: */ |
377 |
if (argreg > MIPS_GPR_A3) { |
378 |
#if 1 |
379 |
/* Linux booters seem to go |
380 |
over the edge sometimes: */ |
381 |
ch = '\0'; |
382 |
strlcpy(printfbuf, "[...]\n", |
383 |
sizeof(printfbuf)); |
384 |
#else |
385 |
printf("[ decstation_prom_emul" |
386 |
"(): too many arguments ]"); |
387 |
/* This reuses the last arg, |
388 |
which is utterly incorrect. |
389 |
(TODO) */ |
390 |
argreg = MIPS_GPR_A3; |
391 |
#endif |
392 |
} |
393 |
|
394 |
ch2 = argdata = |
395 |
cpu->cd.mips.gpr[argreg]; |
396 |
|
397 |
switch (ch) { |
398 |
case 'c': |
399 |
snprintf(printfbuf, sizeof( |
400 |
printfbuf), "%c", ch2); |
401 |
break; |
402 |
case 'd': |
403 |
snprintf(printfbuf, sizeof( |
404 |
printfbuf), "%d", argdata); |
405 |
break; |
406 |
case 'x': |
407 |
snprintf(printfbuf, sizeof( |
408 |
printfbuf), "%x", argdata); |
409 |
break; |
410 |
case 's': |
411 |
/* Print a "%s" string. */ |
412 |
j = 0; ch3 = '\n'; |
413 |
while (ch2) { |
414 |
ch2 = mem_readchar(cpu, |
415 |
argreg, j++); |
416 |
if (ch2) { |
417 |
snprintf( |
418 |
printfbuf + |
419 |
strlen( |
420 |
printfbuf), |
421 |
sizeof( |
422 |
printfbuf)- |
423 |
1-strlen( |
424 |
printfbuf), |
425 |
"%c", ch2); |
426 |
ch3 = ch2; |
427 |
} |
428 |
} |
429 |
break; |
430 |
} |
431 |
argreg ++; |
432 |
break; |
433 |
default: |
434 |
printf("[ unknown printf format char" |
435 |
" '%c' ]", ch); |
436 |
} |
437 |
break; |
438 |
case '\0': |
439 |
break; |
440 |
default: |
441 |
snprintf(printfbuf, sizeof(printfbuf), |
442 |
"%c", ch); |
443 |
} |
444 |
|
445 |
printfbuf[sizeof(printfbuf)-1] = '\0'; |
446 |
|
447 |
for (x=0; x<strlen(printfbuf); x++) |
448 |
console_putchar(cpu->machine-> |
449 |
main_console_handle, printfbuf[x]); |
450 |
} |
451 |
if (cpu->machine->register_dump || |
452 |
cpu->machine->instruction_trace) |
453 |
debug("\n"); |
454 |
fflush(stdout); |
455 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
456 |
break; |
457 |
case 0x54: /* bootinit() */ |
458 |
/* debug("[ DEC PROM bootinit(0x%08x): TODO ]\n", |
459 |
(int)cpu->cd.mips.gpr[MIPS_GPR_A0]); */ |
460 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
461 |
break; |
462 |
case 0x58: /* bootread(int b, void *buffer, int n) */ |
463 |
/* |
464 |
* Read data from the boot device. |
465 |
* b is a sector number (512 bytes per sector), |
466 |
* buffer is the destination address, and n |
467 |
* is the number of _bytes_ to read. |
468 |
* |
469 |
* TODO: Return value? NetBSD thinks that 0 is ok. |
470 |
*/ |
471 |
debug("[ DEC PROM bootread(0x%x, 0x%08x, 0x%x) ]\n", |
472 |
(int)cpu->cd.mips.gpr[MIPS_GPR_A0], |
473 |
(int)cpu->cd.mips.gpr[MIPS_GPR_A1], |
474 |
(int)cpu->cd.mips.gpr[MIPS_GPR_A2]); |
475 |
|
476 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
477 |
|
478 |
if ((int32_t)cpu->cd.mips.gpr[MIPS_GPR_A2] > 0) { |
479 |
int disk_id = diskimage_bootdev(cpu->machine, NULL); |
480 |
int res; |
481 |
unsigned char *tmp_buf; |
482 |
|
483 |
tmp_buf = malloc(cpu->cd.mips.gpr[MIPS_GPR_A2]); |
484 |
if (tmp_buf == NULL) { |
485 |
fprintf(stderr, "[ *** Out of memory in " |
486 |
"dec_prom.c, allocating %i bytes ]\n", |
487 |
(int)cpu->cd.mips.gpr[MIPS_GPR_A2]); |
488 |
break; |
489 |
} |
490 |
|
491 |
res = diskimage_access(cpu->machine, disk_id, |
492 |
DISKIMAGE_SCSI, 0, |
493 |
cpu->cd.mips.gpr[MIPS_GPR_A0] * 512, tmp_buf, |
494 |
cpu->cd.mips.gpr[MIPS_GPR_A2]); |
495 |
|
496 |
/* If the transfer was successful, transfer the data |
497 |
to emulated memory: */ |
498 |
if (res) { |
499 |
uint64_t dst = cpu->cd.mips.gpr[MIPS_GPR_A1]; |
500 |
if (dst < 0x80000000ULL) |
501 |
dst |= 0x80000000; |
502 |
|
503 |
store_buf(cpu, dst, (char *)tmp_buf, |
504 |
cpu->cd.mips.gpr[MIPS_GPR_A2]); |
505 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = |
506 |
cpu->cd.mips.gpr[MIPS_GPR_A2]; |
507 |
} |
508 |
|
509 |
free(tmp_buf); |
510 |
} |
511 |
break; |
512 |
case 0x64: /* getenv() */ |
513 |
/* Find the environment variable given by a0: */ |
514 |
for (i=0; i<(int)sizeof(buf); i++) |
515 |
cpu->memory_rw(cpu, cpu->mem, (int32_t) |
516 |
cpu->cd.mips.gpr[MIPS_GPR_A0] + i, &buf[i], |
517 |
sizeof(char), MEM_READ, CACHE_DATA | NO_EXCEPTIONS); |
518 |
buf[sizeof(buf)-1] = '\0'; |
519 |
debug("[ DEC PROM getenv(\"%s\") ]\n", buf); |
520 |
for (i=0; i<0x1000; i++) { |
521 |
/* Matching string at offset i? */ |
522 |
int nmatches = 0; |
523 |
for (j=0; j<(int32_t)strlen((char *)buf); j++) { |
524 |
cpu->memory_rw(cpu, cpu->mem, (int32_t) |
525 |
(DEC_PROM_STRINGS + i + j), &ch2, |
526 |
sizeof(char), MEM_READ, CACHE_DATA | |
527 |
NO_EXCEPTIONS); |
528 |
if (ch2 == buf[j]) |
529 |
nmatches++; |
530 |
} |
531 |
cpu->memory_rw(cpu, cpu->mem, (int32_t)(DEC_PROM_STRINGS |
532 |
+ i + strlen((char *)buf)), &ch2, sizeof(char), |
533 |
MEM_READ, CACHE_DATA | NO_EXCEPTIONS); |
534 |
if (nmatches == (int)strlen((char *)buf) && ch2=='=') { |
535 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = |
536 |
DEC_PROM_STRINGS + i + |
537 |
strlen((char *)buf) + 1; |
538 |
return 1; |
539 |
} |
540 |
} |
541 |
/* Return NULL if string wasn't found. */ |
542 |
fatal("[ DEC PROM getenv(\"%s\"): WARNING: Not in " |
543 |
"environment! ]\n", buf); |
544 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
545 |
break; |
546 |
case 0x6c: /* ulong slot_address(int sn) */ |
547 |
debug("[ DEC PROM slot_address(%i) ]\n", |
548 |
(int)cpu->cd.mips.gpr[MIPS_GPR_A0]); |
549 |
/* TODO: This is too hardcoded. */ |
550 |
/* TODO 2: Should these be physical or virtual addresses? */ |
551 |
switch (cpu->machine->machine_subtype) { |
552 |
case MACHINE_DEC_3MAX_5000: |
553 |
slot_base = KN02_PHYS_TC_0_START;/* 0x1e000000 */ |
554 |
slot_size = 4*1048576; /* 4 MB */ |
555 |
break; |
556 |
case MACHINE_DEC_3MIN_5000: |
557 |
slot_base = 0x10000000; |
558 |
slot_size = 0x4000000; /* 64 MB */ |
559 |
break; |
560 |
case MACHINE_DEC_3MAXPLUS_5000: |
561 |
slot_base = 0x1e000000; |
562 |
slot_size = 0x800000; /* 8 MB */ |
563 |
break; |
564 |
case MACHINE_DEC_MAXINE_5000: |
565 |
slot_base = 0x10000000; |
566 |
slot_size = 0x4000000; /* 64 MB */ |
567 |
break; |
568 |
default: |
569 |
fatal("warning: DEC PROM slot_address() " |
570 |
"unimplemented for this machine type\n"); |
571 |
} |
572 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = (int64_t)(int32_t) |
573 |
(0x80000000 + slot_base + slot_size * |
574 |
cpu->cd.mips.gpr[MIPS_GPR_A0]); |
575 |
break; |
576 |
case 0x70: /* wbflush() */ |
577 |
debug("[ DEC PROM wbflush(): TODO ]\n"); |
578 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
579 |
break; |
580 |
case 0x7c: /* clear_cache(addr, len) */ |
581 |
debug("[ DEC PROM clear_cache(0x%x,%i) ]\n", |
582 |
(uint32_t)cpu->cd.mips.gpr[MIPS_GPR_A0], |
583 |
(int)cpu->cd.mips.gpr[MIPS_GPR_A1]); |
584 |
/* TODO */ |
585 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; /* ? */ |
586 |
break; |
587 |
case 0x80: /* getsysid() */ |
588 |
/* debug("[ DEC PROM getsysid() ]\n"); */ |
589 |
/* TODO: why did I add the 0x82 stuff??? */ |
590 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = ((uint32_t)0x82 << 24) |
591 |
+ (cpu->machine->machine_subtype << 16) + (0x3 << 8); |
592 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = |
593 |
(int64_t)(int32_t)cpu->cd.mips.gpr[MIPS_GPR_V0]; |
594 |
break; |
595 |
case 0x84: /* getbitmap() */ |
596 |
debug("[ DEC PROM getbitmap(0x%08x) ]\n", |
597 |
(int)cpu->cd.mips.gpr[MIPS_GPR_A0]); |
598 |
store_buf(cpu, cpu->cd.mips.gpr[MIPS_GPR_A0], |
599 |
(char *)cpu->machine->md.pmax.memmap, |
600 |
sizeof(struct dec_memmap)); |
601 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = |
602 |
sizeof(cpu->machine->md.pmax.memmap->bitmap); |
603 |
break; |
604 |
case 0x88: /* disableintr() */ |
605 |
debug("[ DEC PROM disableintr(): TODO ]\n"); |
606 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
607 |
break; |
608 |
case 0x8c: /* enableintr() */ |
609 |
debug("[ DEC PROM enableintr(): TODO ]\n"); |
610 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
611 |
break; |
612 |
case 0x9c: /* halt() */ |
613 |
debug("[ DEC PROM halt() ]\n"); |
614 |
cpu->machine->exit_without_entering_debugger = 1; |
615 |
cpu->running = 0; |
616 |
cpu->dead = 1; |
617 |
break; |
618 |
case 0xa4: /* gettcinfo() */ |
619 |
/* |
620 |
* These are just bogus values... TODO |
621 |
* |
622 |
* 0: revision |
623 |
* 4: clock period in nano seconds |
624 |
* 8: slot size in megabytes TODO: not same for all models! |
625 |
* 12: I/O timeout in cycles |
626 |
* 16: DMA address range in megabytes |
627 |
* 20: maximum DMA burst length |
628 |
* 24: turbochannel parity (yes = 1) |
629 |
* 28: reserved |
630 |
*/ |
631 |
store_32bit_word(cpu, DEC_PROM_TCINFO + 0, 0); |
632 |
store_32bit_word(cpu, DEC_PROM_TCINFO + 4, 50); |
633 |
store_32bit_word(cpu, DEC_PROM_TCINFO + 8, 4); |
634 |
store_32bit_word(cpu, DEC_PROM_TCINFO + 12, 10); |
635 |
store_32bit_word(cpu, DEC_PROM_TCINFO + 16, 1); |
636 |
store_32bit_word(cpu, DEC_PROM_TCINFO + 20, 100); |
637 |
store_32bit_word(cpu, DEC_PROM_TCINFO + 24, 0); |
638 |
store_32bit_word(cpu, DEC_PROM_TCINFO + 28, 0); |
639 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = DEC_PROM_TCINFO; |
640 |
break; |
641 |
case 0xa8: /* int execute_cmd(char *) */ |
642 |
i = 0; |
643 |
while ((ch = mem_readchar(cpu, MIPS_GPR_A0, i++)) != '\0') |
644 |
console_putchar(cpu->machine->main_console_handle, ch); |
645 |
console_putchar(cpu->machine->main_console_handle, '\n'); |
646 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
647 |
break; |
648 |
case 0xac: /* rex() */ |
649 |
debug("[ DEC PROM rex('%c') ]\n", |
650 |
(int)cpu->cd.mips.gpr[MIPS_GPR_A0]); |
651 |
switch ((int32_t)cpu->cd.mips.gpr[MIPS_GPR_A0]) { |
652 |
case 'h': |
653 |
debug("DEC PROM: rex('h') ==> halt\n"); |
654 |
cpu->machine->exit_without_entering_debugger = 1; |
655 |
cpu->running = 0; |
656 |
cpu->dead = 1; |
657 |
break; |
658 |
case 'b': |
659 |
debug("DEC PROM: rex('b') ==> reboot: TODO " |
660 |
"(halting CPU instead)\n"); |
661 |
cpu->machine->exit_without_entering_debugger = 1; |
662 |
cpu->running = 0; |
663 |
cpu->dead = 1; |
664 |
break; |
665 |
default: |
666 |
fatal("DEC prom emulation: unknown rex() a0=0x%"PRIx64 |
667 |
" ('%c')\n", |
668 |
(int64_t) cpu->cd.mips.gpr[MIPS_GPR_A0], |
669 |
(char) cpu->cd.mips.gpr[MIPS_GPR_A0]); |
670 |
cpu->running = 0; |
671 |
cpu->dead = 1; |
672 |
} |
673 |
break; |
674 |
default: |
675 |
cpu_register_dump(cpu->machine, cpu, 1, 0x1); |
676 |
printf("a0 points to: "); |
677 |
for (i=0; i<40; i++) { |
678 |
unsigned char ch = '\0'; |
679 |
cpu->memory_rw(cpu, cpu->mem, (int32_t) |
680 |
cpu->cd.mips.gpr[MIPS_GPR_A0] + i, &ch, |
681 |
sizeof(ch), MEM_READ, CACHE_DATA | NO_EXCEPTIONS); |
682 |
if (ch >= ' ' && ch < 126) |
683 |
printf("%c", ch); |
684 |
else |
685 |
printf("[%02x]", ch); |
686 |
} |
687 |
printf("\n"); |
688 |
fatal("PROM emulation: unimplemented callback vector 0x%x\n", |
689 |
vector); |
690 |
cpu->running = 0; |
691 |
cpu->dead = 1; |
692 |
} |
693 |
|
694 |
return 1; |
695 |
} |
696 |
|