coreboot-kgpe-d16/util/vgabios/testbios.c

331 lines
6.1 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); }
#define warn(x) { perror(x); }
#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;
printf("int%x vector at %x\n", num, getIntVect(num));
/* This is a pInt leftover */
current->num = num;
switch (num) {
#ifndef _PC
case 0x10:
case 0x42:
case 0x6D:
if (getIntVect(num) == 0xFF065) {
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)
ret = run_bios_int(num);
if (!ret) {
printf("\nint%x: not implemented\n", num);
x86emu_dump_xregs();
}
}
unsigned char *mapitin(char *file, off_t where, size_t size)
{
void *z;
int fd = open(file, O_RDWR, 0);
if (fd < 0)
die(file);
z = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, where);
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)
{
char *absegname = 0;
void *abseg = 0;
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;
char *fsegname = 0;
unsigned char *fsegptr;
unsigned short initialip = 0, initialcs = 0, devfn = 0;
X86EMU_intrFuncs intFuncs[256];
void X86EMU_setMemBase(void *base, size_t size);
void X86EMU_setabseg(void *abseg);
void x86emu_dump_xregs(void);
int X86EMU_set_debug(int debug);
int debugflag = 0;
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'},
{"fseg", 1, 0, 'f'},
{"instructionpointer", 1, 0, 'i'},
{"codesegment", 1, 0, 'c'},
{"absegment", 1, 0, 'a'},
{"size", 1, 0, 's'},
{"parserom", 0, 0, 'p'},
{"device", 1, 0, 'd'},
{"debug", 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 'f':
fsegname = optarg;
break;
case 'a':
absegname = optarg;
break;
case 'd':
devfn = strtol(optarg, 0, 0);
break;
case 'D':
debugflag = 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;
}
//printf("Point 1 int%x vector at %x\n", 0x42, getIntVect(0x42));
if (absegname) {
abseg = mapitin(absegname, (off_t) 0xa0000, 0x20000);
if (!abseg)
die(absegname);
}
current = &p;
X86EMU_setMemBase(biosmem, sizeof(biosmem));
X86EMU_setabseg(abseg);
X86EMU_setupPioFuncs(&myfuncs);
ioperm(0, 0x400, 1);
if (iopl(3) < 0) {
warn("iopl failed, continuing anyway");
}
/* 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, (off_t) 0, size);
current->ax = devfn ? devfn : 0xff;
current->dx = 0x80;
// current->ip = 0;
for (i = 0; i < size; i++)
wrb(base + i, cp[i]);
if (fsegname) {
fsegptr = mapitin(fsegname, (off_t) 0, 0x10000);
for (i = 0; i < 0x10000; i++)
wrb(0xf0000 + i, fsegptr[i]);
} else {
char *date = "01/01/99";
for (i = i; date[i]; i++)
wrb(0xffff5 + i, date[i]);
wrb(0xffff7, '/');
wrb(0xffffa, '/');
}
/* 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();
}
if (debugflag) {
X86EMU_set_debug(debugflag);
}
X86EMU_exec();
/* Cleaning up */
pciExit();
return 0;
}