switch-coreboot/util/vgabios/testbios.c
Ronald G. Minnich 0db5c853be Stefan's fixes
2002-04-23 20:45:28 +00:00

283 lines
5 KiB
C

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/io.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <getopt.h>
#define die(x) { perror(x); exit(1); }
#include <x86emu.h>
#include "test.h"
#include "pci-userspace.h"
void x86emu_dump_xregs (void);
int int15_handler(void);
int int16_handler(void);
int int1A_handler(void);
#ifndef _PC
int int42_handler(void);
#endif
int intE6_handler(void);
void pushw(u16 val);
extern int teststart, testend;
_ptr p;
ptr current = 0;
unsigned char biosmem[1024*1024];
int verbose=0;
/* Interrupt multiplexer */
void do_int(int num)
{
int ret = 0;
/* This is a pInt leftover */
current->num=num;
switch (num) {
#ifndef _PC
case 0x10:
case 0x42:
case 0x6D:
ret = int42_handler();
break;
#endif
case 0x15:
ret = int15_handler();
break;
case 0x16:
ret = int16_handler();
break;
case 0x1A:
ret = int1A_handler();
break;
case 0xe6:
ret = intE6_handler();
break;
default:
break;
}
if (!ret) {
printf("\nint%x: not implemented\n",num);
x86emu_dump_xregs();
}
}
unsigned char *mapitin(char *file, size_t size)
{
void * z;
off_t offset;
int fd = open(file, O_RDONLY, 0);
if (fd < 0)
die(file);
offset = 0;
z = mmap(0, size, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, offset);
if (z == (void *) -1)
die("mmap");
close(fd);
return z;
}
u8 x_inb(u16 port);
u16 x_inw(u16 port);
void x_outb(u16 port, u8 val);
void x_outw(u16 port, u16 val);
u32 x_inl(u16 port);
void x_outl(u16 port, u32 val);
X86EMU_pioFuncs myfuncs = {
x_inb, x_inw, x_inl,
x_outb, x_outw, x_outl
};
void usage(char *name)
{
printf("Usage: %s [-c codesegment] [-s size] [-b base] [-i ip] [-t] <filename> ... \n",name);
}
int main(int argc, char **argv)
{
int i,c,trace=0;
unsigned char *cp;
char *filename;
size_t size=0;
int base=0;
int have_size=0, have_base=0, have_ip=0, have_cs=0;
int parse_rom=0;
unsigned short initialip=0, initialcs=0, devfn=0;
X86EMU_intrFuncs intFuncs[256];
void X86EMU_setMemBase(void *base, size_t size);
void x86emu_dump_xregs (void);
const char *optstring="vh?b:i:c:s:tpd:";
while (1) {
int option_index = 0;
static struct option long_options[] = {
{ "verbose", 0, 0, 'v' },
{ "help", 0, 0, 'h' },
{ "trace", 0, 0, 't' },
{ "base", 1, 0, 'b' },
{ "instructionpointer", 1, 0, 'i' },
{ "codesegment", 1, 0, 'c' },
{ "size", 1, 0, 's' },
{ "parserom", 0, 0, 'p' },
{ "device", 1, 0, 'd' },
{ 0, 0, 0, 0 }
};
c = getopt_long (argc, argv, optstring,
long_options, &option_index);
if (c == -1)
break;
switch (c) {
case 'v':
verbose=1;
break;
case 'h':
case '?':
usage(argv[0]);
return 0;
case 't':
trace=1;
break;
case 'b':
base = strtol(optarg, 0, 0);
have_base=1;
break;
case 'i':
initialip=strtol(optarg, 0, 0);
have_ip=1;
break;
case 'c':
initialcs=strtol(optarg, 0, 0);
have_cs=1;
break;
case 's':
size=strtol(optarg, 0, 0);
have_size=1;
break;
case 'p':
printf("Parsing rom images not implemented.\n");
parse_rom=1;
break;
case 'd':
devfn=strtol(optarg, 0, 0);
break;
default:
printf("Unknown option \n");
usage(argv[0]);
return 1;
}
}
if (optind >= argc) {
printf("Filename missing.\n");
usage(argv[0]);
return 1;
}
while (optind < argc) {
printf("running file %s\n",argv[optind]);
filename=argv[optind];
optind++;
/* normally we would do continue, but for
* now only one filename is supported.
*/
/* continue; */
break;
}
if (!have_size) {
printf("No size specified. defaulting to 32k\n");
size=32*1024;
}
if (!have_base) {
printf("No base specified. defaulting to 0xc0000\n");
base=0xc0000;
}
if (!have_cs) {
printf("No initial code segment specified. defaulting to 0xc000\n");
initialcs=0xc000;
}
if (!have_ip) {
printf("No initial instruction pointer specified. defaulting to 0x0003\n");
initialip=0x0003;
}
current = &p;
X86EMU_setMemBase(biosmem, sizeof(biosmem));
X86EMU_setupPioFuncs(&myfuncs);
if (iopl(3) < 0)
die("iopl");
/* Emergency sync ;-) */
sync();
sync();
/* Setting up interrupt environment.
* basically this means initializing PCI and
* intXX handlers.
*/
pciInit();
for (i=0;i<256;i++)
intFuncs[i] = do_int;
X86EMU_setupIntrFuncs(intFuncs);
cp = mapitin(filename, size);
current->ax = devfn?devfn:0xff;
current->dx = 0x80;
// current->ip = 0;
for(i = 0; i < size; i++)
wrb(base + i, cp[i]);
/* cpu setup */
X86_AX = devfn?devfn:0xff;
X86_DX = 0x80;
X86_EIP = initialip;
X86_CS = initialcs;
/* Initialize stack and data segment */
X86_SS = 0x0030;
X86_DS = 0x0040;
X86_SP = 0xfffe;
/* We need a sane way to return from bios
* execution. A hlt instruction and a pointer
* to it, both kept on the stack, will do.
*/
pushw(0xf4f4); /* hlt; hlt */
pushw(X86_SS);
pushw(X86_SP+2);
X86_ES = 0x0000;
if (trace) {
printf("Switching to single step mode.\n");
X86EMU_trace_on();
}
X86EMU_exec();
/* Cleaning up */
pciExit();
return 0;
}