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-rw-r--r--int10/i10_vbios.c606
1 files changed, 0 insertions, 606 deletions
diff --git a/int10/i10_vbios.c b/int10/i10_vbios.c
deleted file mode 100644
index 5d12741..0000000
--- a/int10/i10_vbios.c
+++ /dev/null
@@ -1,606 +0,0 @@
-/*
- * Copyright 1999 Egbert Eich
- *
- * Permission to use, copy, modify, distribute, and sell this software and its
- * documentation for any purpose is hereby granted without fee, provided that
- * the above copyright notice appear in all copies and that both that
- * copyright notice and this permission notice appear in supporting
- * documentation, and that the name of the authors not be used in
- * advertising or publicity pertaining to distribution of the software without
- * specific, written prior permission. The authors makes no representations
- * about the suitability of this software for any purpose. It is provided
- * "as is" without express or implied warranty.
- *
- * THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
- * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
- * EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
- * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
- * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
- * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- * PERFORMANCE OF THIS SOFTWARE.
- */
-#include <unistd.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <stdint.h>
-#include <errno.h>
-#include <sys/mman.h>
-#include <sys/types.h>
-#include <string.h>
-#include <stdlib.h>
-#include <signal.h>
-#include <sys/stat.h>
-#include <setjmp.h>
-#if defined(__alpha__) || defined (__ia64__)
-#include <sys/io.h>
-//#elif defined(HAVE_SYS_PERM)
-#else
-#include <sys/perm.h>
-#endif
-#include "v86bios.h"
-#include "pci.h"
-#include "AsmMacros.h"
-#include "vbios.h"
-
-void log_err(char *format, ...) __attribute__ ((format (printf, 1, 2)));
-
-#define SIZE 0x100000
-#define VRAM_START 0xA0000
-#define VRAM_SIZE 0x1FFFF
-#define V_BIOS_SIZE 0x1FFFF
-#define BIOS_START 0x7C00 /* default BIOS entry */
-
-static CARD8 code[] = { 0xcd, 0x10, 0xf4 }; /* int 0x10, hlt */
-// static CARD8 code13[] = { 0xcd, 0x13, 0xf4 }; /* int 0x13, hlt */
-
-static int int10_bios_ok(void);
-static int map(void);
-static void unmap(void);
-static int map_vram(hd_data_t *hd_data);
-static void unmap_vram(void);
-static int copy_vbios(hd_data_t *hd_data);
-// static int copy_sbios(void);
-#if MAP_SYS_BIOS
-static int copy_sys_bios(hd_data_t *hd_data);
-#endif
-static int copy_bios_ram(hd_data_t *hd_data);
-static int setup_system_bios(hd_data_t *hd_data);
-static void setup_int_vect(void);
-static int chksum(CARD8 *start);
-#define hd_read_mmap(UNUSED, NAME, BUF, START, SIZE) i10_read_mmap(NAME, BUF, START, SIZE)
-static int i10_read_mmap(char *name, unsigned char *buf, off_t start, unsigned size);
-
-void loadCodeToMem(unsigned char *ptr, CARD8 *code);
-
-static int vram_mapped = 0;
-static int int10inited = 0;
-
-static sigjmp_buf longjmp_buf;
-
-static void sigsegv_handler(int);
-
-int InitInt10(hd_data_t *hd_data)
-{
- if(geteuid()) return -1;
-
- if(!map()) return -1;
-
- if(!setup_system_bios(hd_data)) {
- unmap();
- return -1;
- }
-
- setup_io();
-
- if(iopl(3) < 0) {
- unmap();
- return -1;
- }
-
- iopl(0);
-
- setup_int_vect();
-
- if(!copy_vbios(hd_data)) {
- unmap();
- return -1;
- }
-
- if(hd_data->flags.biosvram) map_vram(hd_data);
-
- if(!copy_bios_ram(hd_data)) {
- unmap();
- return -1;
- }
-
- if(!int10_bios_ok()) {
- unmap();
- return -1;
- }
-
- int10inited = 1;
-
- return 0;
-}
-
-
-void FreeInt10()
-{
- if(!int10inited) return;
-
- unmap_vram();
- unmap();
-
- int10inited = 0;
-}
-
-
-/*
- * Check whether int 0x10 points to some useful code.
- */
-int int10_bios_ok()
-{
- unsigned cs, ip;
- unsigned char *p;
-
- ip = ((uint16_t *) 0)[0x10 * 2];
- cs = ((uint16_t *) 0)[0x10 * 2 + 1];
-
- p = (unsigned char *)(uintptr_t) ((cs << 4) + ip);
-
- log_err(
- " vbe: int 10h points to %04x:%04x: %02x %02x %02x %02x %02x %02x %02x %02x\n",
- cs, ip,
- p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]
- );
-
- /* It can't possibly start with all zeros. */
- if( !(p[0] || p[1] || p[2] || p[3]) ) {
- log_err(" vbe: oops, int 10h points into nirvana!\n");
-
- return 0;
- }
-
- return 1;
-}
-
-
-void sigsegv_handler(int num)
-{
- siglongjmp(longjmp_buf, num + 1000);
-}
-
-
-int CallInt10(int *ax, int *bx, int *cx, unsigned char *buf, int len, int cpuemu)
-{
- i86biosRegs bRegs;
- void (*old_sigsegv_handler)(int) = SIG_DFL;
- void (*old_sigill_handler)(int) = SIG_DFL;
- void (*old_sigtrap_handler)(int) = SIG_DFL;
- int jmp;
-
- if(!int10inited) return -1;
- memset(&bRegs, 0, sizeof bRegs);
- bRegs.ax = *ax;
- bRegs.bx = *bx;
- bRegs.cx = *cx;
- bRegs.dx = 0;
- bRegs.es = 0x7e0;
- bRegs.di = 0x0;
- if(buf) memcpy((unsigned char *) 0x7e00, buf, len);
-
- iopl(3);
-
- jmp = sigsetjmp(longjmp_buf, 1);
-
- if(!jmp) {
- old_sigsegv_handler = signal(SIGSEGV, sigsegv_handler);
- old_sigill_handler = signal(SIGILL, sigsegv_handler);
- old_sigtrap_handler = signal(SIGTRAP, sigsegv_handler);
-
- loadCodeToMem((unsigned char *) BIOS_START, code);
- do_x86(BIOS_START, &bRegs, cpuemu);
- }
- else {
- int10inited = 0;
- log_err("oops: got signal %d in vm86() code\n", jmp - 1000);
- }
-
- signal(SIGTRAP, old_sigtrap_handler);
- signal(SIGILL, old_sigill_handler);
- signal(SIGSEGV, old_sigsegv_handler);
-
- iopl(0);
-
- if(buf) memcpy(buf, (unsigned char *) 0x7e00, len);
-
- *ax = bRegs.ax;
- *bx = bRegs.bx;
- *cx = bRegs.cx;
-
- return bRegs.ax;
-}
-
-
-#if 0
-int CallInt13(int *ax, int *bx, int *cx, int *dx, unsigned char *buf, int len, int cpuemu)
-{
- i86biosRegs bRegs;
-
- if(!int10inited) return -1;
- memset(&bRegs, 0, sizeof bRegs);
- bRegs.ax = *ax;
- bRegs.bx = *bx;
- bRegs.cx = *cx;
- bRegs.dx = *dx;
- bRegs.es = 0x7e0;
- bRegs.ds = 0x7e0;
- bRegs.di = 0x0;
- bRegs.si = 0x0;
- if(buf) memcpy((unsigned char *) 0x7e00, buf, len);
-
- iopl(3);
-
- loadCodeToMem((unsigned char *) BIOS_START, code13);
- do_x86(BIOS_START, &bRegs, cpuemu);
-
- iopl(0);
-
- if(buf) memcpy(buf, (unsigned char *) 0x7e00, len);
-
- *ax = bRegs.ax;
- *bx = bRegs.bx;
- *cx = bRegs.cx;
- *dx = bRegs.dx;
-
- return bRegs.ax;
-}
-#endif
-
-
-int map()
-{
- void* mem;
-
- mem = mmap(0, (size_t) SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_FIXED | MAP_PRIVATE | MAP_ANON, -1, 0);
-
- if(mem) {
- perror("anonymous map");
- return 0;
- }
-
- memset(mem, 0, SIZE);
-
- loadCodeToMem((unsigned char *) BIOS_START, code);
-
- return 1;
-}
-
-
-void unmap()
-{
- munmap(0, SIZE);
-}
-
-
-int map_vram(hd_data_t *hd_data)
-{
- int mem_fd;
-
-#ifdef __ia64__
- if((mem_fd = open(MEM_FILE,O_RDWR | O_SYNC)) < 0)
-#else
- if((mem_fd = open(MEM_FILE,O_RDWR)) < 0)
-#endif
- {
- log_err("map vram: open /dev/mem failed (%s)\n", strerror(errno));
-
- return 0;
- }
-
-#ifndef __alpha__
- if(
- mmap(
- (void *) VRAM_START,
- (size_t) VRAM_SIZE,
- PROT_EXEC | PROT_READ | PROT_WRITE, MAP_SHARED | MAP_FIXED,
- mem_fd,
- VRAM_START
- ) == (void *) -1
- )
-#else
- if(!_bus_base()) sparse_shift = 7; /* Uh, oh, JENSEN... */
- if(!_bus_base_sparse()) sparse_shift = 0;
-
- if(
- (vram_map = mmap(
- 0,
- (size_t) (VRAM_SIZE << sparse_shift),
- PROT_READ | PROT_WRITE,
- MAP_SHARED,
- mem_fd,
- (VRAM_START << sparse_shift) | _bus_base_sparse()
- )) == (void *) -1
- )
-#endif
- {
- log_err(
- "/dev/mem[0x%x, %u]: mmap(, %u,,,, 0x%x) failed: %s\n",
- (unsigned) VRAM_START, VRAM_SIZE, VRAM_SIZE, (unsigned) VRAM_START, strerror(errno)
- );
-
- close(mem_fd);
-
- return 0;
- }
-
- log_err(
- "/dev/mem[0x%x, %u]: mmap(, %u,,,, 0x%x) ok\n",
- (unsigned) VRAM_START, VRAM_SIZE, VRAM_SIZE, (unsigned) VRAM_START
- );
-
- vram_mapped = 1;
-
- close(mem_fd);
-
- return 1;
-}
-
-
-void unmap_vram()
-{
- if(!vram_mapped) return;
-
- munmap((void*) VRAM_START, VRAM_SIZE);
-
- vram_mapped = 0;
-}
-
-
-/*
- * Read video BIOS from /dev/mem.
- *
- * Return:
- * 0: failed
- * 1: ok
- */
-int copy_vbios(hd_data_t *hd_data)
-{
- unsigned size;
- unsigned char tmp[3];
- int i;
-
- if(!hd_read_mmap(hd_data, MEM_FILE, tmp, V_BIOS, sizeof tmp)) {
- log_err("vbe: failed to read %u bytes at 0x%x\n", (unsigned) sizeof tmp, V_BIOS);
- return 0;
- }
-
- if(tmp[0] != 0x55 || tmp[1] != 0xAA ) {
- log_err("vbe: no bios found at: 0x%x\n", V_BIOS);
- return 0;
- }
-
- size = tmp[2] * 0x200;
-
- if(!hd_read_mmap(hd_data, MEM_FILE, (unsigned char *) V_BIOS, V_BIOS, size)) {
- log_err("vbe: failed to read %d bytes at 0x%x\n", size, V_BIOS);
- return 0;
- }
-
- if((i = chksum((CARD8 *) V_BIOS)) || !hd_data->flags.nobioscrc) return i;
-#ifdef __i386__
- /* use cpu emulation for broken BIOSes */
- hd_data->flags.cpuemu |= 1;
-#endif
-
- return 1;
-}
-
-
-#if MAP_SYS_BIOS
-static int
-copy_sys_bios(hd_data_t *hd_data)
-{
- return hd_read_mmap(hd_data, MEM_FILE, (unsigned char *) 0xf0000, 0xf0000, 0xffff);
-}
-#endif
-
-
-static int copy_bios_ram(hd_data_t *hd_data)
-{
- return hd_read_mmap(hd_data, MEM_FILE, (unsigned char *) 0, 0, 0x1000);
-}
-
-void loadCodeToMem(unsigned char *ptr, CARD8 *code)
-{
- while((*ptr++ = *code++) != 0xf4 /* hlt */);
-
- return;
-}
-
-
-/*
- * here we are really paranoid about faking a "real"
- * BIOS. Most of this information was pulled from
- * dosem.
- */
-static void
-setup_int_vect(void)
-{
- const CARD16 cs = 0x0000;
- const CARD16 ip = 0x0;
- int i;
-
- /* let the int vects point to the SYS_BIOS seg */
- for (i=0; i<0x80; i++) {
- ((CARD16*)0)[i<<1] = ip;
- ((CARD16*)0)[(i<<1)+1] = cs;
- }
- /* video interrupts default location */
- ((CARD16*)0)[(0x42<<1)+1] = 0xf000;
- ((CARD16*)0)[0x42<<1] = 0xf065;
- ((CARD16*)0)[(0x10<<1)+1] = 0xf000;
- ((CARD16*)0)[0x10<<1] = 0xf065;
- /* video param table default location (int 1d) */
- ((CARD16*)0)[(0x1d<<1)+1] = 0xf000;
- ((CARD16*)0)[0x1d<<1] = 0xf0A4;
- /* font tables default location (int 1F) */
- ((CARD16*)0)[(0x1f<<1)+1] = 0xf000;
- ((CARD16*)0)[0x1f<<1] = 0xfa6e;
-
- /* int 11 default location */
- ((CARD16*)0)[(0x11<1)+1] = 0xf000;
- ((CARD16*)0)[0x11<<1] = 0xf84d;
- /* int 12 default location */
- ((CARD16*)0)[(0x12<<1)+1] = 0xf000;
- ((CARD16*)0)[0x12<<1] = 0xf841;
- /* int 15 default location */
- ((CARD16*)0)[(0x15<<1)+1] = 0xf000;
- ((CARD16*)0)[0x15<<1] = 0xf859;
- /* int 1A default location */
- ((CARD16*)0)[(0x1a<<1)+1] = 0xf000;
- ((CARD16*)0)[0x1a<<1] = 0xff6e;
- /* int 05 default location */
- ((CARD16*)0)[(0x05<<1)+1] = 0xf000;
- ((CARD16*)0)[0x05<<1] = 0xff54;
- /* int 08 default location */
- ((CARD16*)0)[(0x8<<1)+1] = 0xf000;
- ((CARD16*)0)[0x8<<1] = 0xfea5;
- /* int 13 default location (fdd) */
- ((CARD16*)0)[(0x13<<1)+1] = 0xf000;
- ((CARD16*)0)[0x13<<1] = 0xec59;
- /* int 0E default location */
- ((CARD16*)0)[(0xe<<1)+1] = 0xf000;
- ((CARD16*)0)[0xe<<1] = 0xef57;
- /* int 17 default location */
- ((CARD16*)0)[(0x17<<1)+1] = 0xf000;
- ((CARD16*)0)[0x17<<1] = 0xefd2;
- /* fdd table default location (int 1e) */
- ((CARD16*)0)[(0x1e<<1)+1] = 0xf000;
- ((CARD16*)0)[0x1e<<1] = 0xefc7;
-}
-
-static int
-setup_system_bios(hd_data_t *hd_data)
-{
- char *date = "06/01/99";
- char *eisa_ident = "PCI/ISA";
-
-#if MAP_SYS_BIOS
- if (!copy_sys_bios(hd_data)) return 0;
- return 1;
-#endif
-// memset((void *)0xF0000,0xf4,0xfff7);
-
- /*
- * we trap the "industry standard entry points" to the BIOS
- * and all other locations by filling them with "hlt"
- * TODO: implement hlt-handler for these
- */
- memset((void *)0xF0000,0xf4,0x10000);
-
- /*
- * TODO: we should copy the fdd table (0xfec59-0xfec5b)
- * the video parameter table (0xf0ac-0xf0fb)
- * and the font tables (0xfa6e-0xfe6d)
- * from the original bios here
- */
-
- /* set bios date */
- strcpy((char *)0xFFFF5,date);
- /* set up eisa ident string */
- strcpy((char *)0xFFFD9,eisa_ident);
- /* write system model id for IBM-AT */
- ((char *)0)[0xFFFFE] = 0xfc;
-
- return 1;
-}
-
-
-/*
- * Check BIOS CRC.
- *
- * Return:
- * 0: failed
- * 1: ok
- */
-int chksum(CARD8 *start)
-{
- CARD16 size;
- CARD8 val = 0;
- int i;
-
- size = start[2] * 0x200;
- for(i = 0; i < size; i++) val += start[i];
-
- if(!val) return 1;
-
- log_err("vbe: BIOS chksum wrong\n");
-
- return 0;
-}
-
-
-/*
- * Read using mmap().
- */
-int i10_read_mmap(char *name, unsigned char *buf, off_t start, unsigned size)
-{
- off_t map_start, xofs;
- int psize = getpagesize(), fd;
- unsigned map_size;
- void *p;
- struct stat sbuf;
-
- if(!size || !name) return 0;
-
- memset(buf, 0, size);
-
- map_start = start & -psize;
- xofs = start - map_start;
-
- map_size = (xofs + size + psize - 1) & -psize;
-
- fd = open(name, O_RDONLY);
-
- if(fd == -1) return 0;
-
- if(!fstat(fd, &sbuf) && S_ISREG(sbuf.st_mode)) {
- if(sbuf.st_size < start + size) {
- if(sbuf.st_size > start) {
- size = sbuf.st_size - start;
- }
- else {
- size = 0;
- }
- }
- }
-
- if(!size) {
- close(fd);
- return 0;
- }
-
- p = mmap(NULL, map_size, PROT_READ, MAP_PRIVATE, fd, map_start);
-
- if(p == MAP_FAILED) {
- log_err(
- "%s[0x%x, %u]: mmap(, %u,,,, 0x%x) failed: %s\n",
- name, (unsigned) start, size, map_size, (unsigned) map_start, strerror(errno)
- );
- close(fd);
- return 0;
- }
- if (0) log_err(
- "%s[0x%x, %u]: mmap(, %u,,,, 0x%x) ok\n",
- name, (unsigned) start, size, map_size, (unsigned) map_start
- );
-
- memcpy(buf, p + xofs, size);
-
- munmap(p, map_size);
-
- close(fd);
-
- return 1;
-}
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