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/* |
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* Copyright (C) 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: of.c,v 1.3 2005/09/01 13:27:13 debug Exp $ |
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* |
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* OpenFirmware emulation. |
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* |
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* Development notes: Care must be taken so that the code in here works |
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* with (at least) POWER/PowerPC, ARM, and SPARC. |
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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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|
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#include "console.h" |
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#include "cpu.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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|
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#define N_MAX_ARGS 10 |
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#define ARG_MAX_LEN 4096 |
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|
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extern int quiet_mode; |
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|
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/* TODO: IMPORTANT! Change this into something else, to allow multiple |
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opens of the same device: */ |
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#define HANDLE_STDIN 0 |
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#define HANDLE_STDOUT 1 |
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#define HANDLE_STDERR 2 |
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#define HANDLE_MMU 3 |
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#define HANDLE_MEMORY 4 |
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#define HANDLE_CHOSEN 5 |
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|
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|
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/* |
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* readstr(): |
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* |
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* Helper function to read a string from emulated memory. |
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*/ |
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static void readstr(struct cpu *cpu, uint64_t addr, char *strbuf, |
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int bufsize) |
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{ |
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int i; |
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for (i=0; i<bufsize; i++) { |
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unsigned char ch; |
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cpu->memory_rw(cpu, cpu->mem, addr + i, |
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&ch, sizeof(ch), MEM_READ, CACHE_DATA | NO_EXCEPTIONS); |
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strbuf[i] = '\0'; |
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if (ch >= 1 && ch < 32) |
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ch = 0; |
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strbuf[i] = ch; |
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if (strbuf[i] == '\0') |
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break; |
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} |
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|
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strbuf[bufsize - 1] = '\0'; |
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} |
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|
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|
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/* |
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* of_emul(): |
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* |
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* OpenFirmware call emulation. |
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*/ |
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int of_emul(struct cpu *cpu) |
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{ |
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int i, nargs, nret, ofs, handle, retval; |
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char service[50]; |
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char arg[N_MAX_ARGS][ARG_MAX_LEN]; |
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char tmpstr[ARG_MAX_LEN]; |
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uint64_t base, ptr; |
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uint64_t buf, buflen; |
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|
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/* |
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* The first argument register points to "prom_args": |
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* |
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* char *service; (probably 32 bit) |
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* int nargs; |
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* int nret; |
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* char *args[10]; |
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*/ |
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|
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switch (cpu->machine->arch) { |
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case ARCH_ARM: |
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base = cpu->cd.arm.r[0]; |
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break; |
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case ARCH_PPC: |
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base = cpu->cd.ppc.gpr[3]; |
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break; |
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default: |
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fatal("of_emul(): TODO: unimplemented arch\n"); |
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exit(1); |
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} |
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|
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/* TODO: how about 64-bit OpenFirmware? */ |
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ptr = load_32bit_word(cpu, base); |
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nargs = load_32bit_word(cpu, base + 4); |
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nret = load_32bit_word(cpu, base + 8); |
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|
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readstr(cpu, ptr, service, sizeof(service)); |
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|
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debug("[ of: %s(", service); |
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ofs = 12; |
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for (i=0; i<nargs; i++) { |
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if (i > 0) |
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debug(", "); |
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if (i >= N_MAX_ARGS) { |
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fatal("TOO MANY ARGS!"); |
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continue; |
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} |
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ptr = load_32bit_word(cpu, base + ofs); |
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readstr(cpu, ptr, arg[i], ARG_MAX_LEN); |
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if (arg[i][0]) |
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debug("\"%s\"", arg[i]); |
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else { |
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int x = ptr; |
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if (x > -256 && x < 256) |
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debug("%i", x); |
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else |
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debug("0x%x", x); |
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} |
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ofs += sizeof(uint32_t); |
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} |
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debug(") ]\n"); |
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|
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/* Return value: */ |
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retval = 0; |
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|
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/* Note: base + ofs points to the first return slot. */ |
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|
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if (strcmp(service, "exit") == 0) { |
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cpu->running = 0; |
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} else if (strcmp(service, "finddevice") == 0) { |
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/* Return a handle in ret[0]: */ |
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if (nret < 1) { |
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fatal("[ of: finddevice(\"%s\"): nret < 1! ]\n", |
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arg[0]); |
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} else if (strcmp(arg[0], "/memory") == 0) { |
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store_32bit_word(cpu, base + ofs, HANDLE_MEMORY); |
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} else if (strcmp(arg[0], "/chosen") == 0) { |
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store_32bit_word(cpu, base + ofs, HANDLE_CHOSEN); |
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} else { |
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/* Device not found. */ |
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fatal("[ of: finddevice(\"%s\"): not yet" |
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" implemented ]\n", arg[0]); |
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retval = -1; |
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} |
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} else if (strcmp(service, "getprop") == 0) { |
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handle = load_32bit_word(cpu, base + 12 + 4*0); |
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ptr = load_32bit_word(cpu, base + 12 + 4*1); |
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buf = load_32bit_word(cpu, base + 12 + 4*2); |
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buflen = load_32bit_word(cpu, base + 12 + 4*3); |
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readstr(cpu, ptr, tmpstr, sizeof(tmpstr)); |
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|
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/* TODO: rewrite this */ |
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switch (handle) { |
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case HANDLE_MEMORY: |
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if (strcmp(tmpstr, "available") == 0) { |
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store_32bit_word(cpu, base + ofs, 2*8); |
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/* TODO. {start, size} */ |
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store_32bit_word(cpu, buf, 0); |
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store_32bit_word(cpu, buf+4, |
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cpu->machine->physical_ram_in_mb * 1048576 |
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- 65536); |
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store_32bit_word(cpu, buf+8, 0); |
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store_32bit_word(cpu, buf+12, 0); |
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} else if (strcmp(tmpstr, "reg") == 0) { |
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/* TODO */ |
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store_32bit_word(cpu, base + ofs, 33*8); |
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store_32bit_word(cpu, buf, 0); |
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store_32bit_word(cpu, buf+4, |
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cpu->machine->physical_ram_in_mb * 1048576); |
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store_32bit_word(cpu, buf+8, 0); |
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store_32bit_word(cpu, buf+12, 0); |
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} else { |
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fatal("[ of: getprop(%i,\"%s\"): not yet" |
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" implemented ]\n", (int)handle, arg[1]); |
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retval = -1; |
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} |
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break; |
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case HANDLE_CHOSEN: |
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if (strcmp(tmpstr, "stdin") == 0) { |
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if (buflen >= 4) |
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store_32bit_word(cpu, buf, |
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HANDLE_STDIN); |
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store_32bit_word(cpu, base + ofs, 4); |
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} else if (strcmp(tmpstr, "stdout") == 0) { |
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if (buflen >= 4) |
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store_32bit_word(cpu, buf, |
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HANDLE_STDOUT); |
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store_32bit_word(cpu, base + ofs, 4); |
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} else if (strcmp(tmpstr, "mmu") == 0) { |
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if (buflen >= 4) |
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store_32bit_word(cpu, buf, |
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HANDLE_MMU); |
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store_32bit_word(cpu, base + ofs, 4); |
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} else { |
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fatal("[ of: getprop(%i,\"%s\"): not yet" |
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" implemented ]\n", (int)handle, arg[1]); |
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retval = -1; |
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} |
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break; |
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default: |
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fatal("[ of: getprop(%i,\"%s\"): not yet" |
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" implemented ]\n", (int)handle, arg[1]); |
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retval = -1; |
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} |
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} else if (strcmp(service, "instance-to-package") == 0) { |
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/* TODO: a package handle */ |
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store_32bit_word(cpu, base + ofs, 1000); |
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} else if (strcmp(service, "getproplen") == 0) { |
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/* TODO */ |
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store_32bit_word(cpu, base + ofs, 0); |
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} else if (strcmp(service, "peer") == 0) { |
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/* TODO */ |
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store_32bit_word(cpu, base + ofs, 0); |
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} else { |
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quiet_mode = 0; |
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cpu_register_dump(cpu->machine, cpu, 1, 0); |
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printf("\n"); |
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fatal("[ of_emul(): unimplemented service \"%s\" ]\n", service); |
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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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switch (cpu->machine->arch) { |
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case ARCH_ARM: |
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cpu->cd.arm.r[0] = retval; |
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break; |
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case ARCH_PPC: |
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cpu->cd.ppc.gpr[3] = retval; |
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break; |
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default: |
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fatal("of_emul(): TODO: unimplemented arch (Retval)\n"); |
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exit(1); |
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} |
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|
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return 1; |
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} |
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