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accept bigger PC BIOSes 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@946 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2004-06-20 13:43:27 +00:00
parent 7086749072
commit 7587cf4401
3 changed files with 45 additions and 8 deletions
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38
hw/pc.c
View File

@ -322,6 +322,8 @@ void pc_init(int ram_size, int vga_ram_size, int boot_device,
{
char buf[1024];
int ret, linux_boot, initrd_size, i, nb_nics1, fd;
unsigned long bios_offset, vga_bios_offset;
int bios_size, isa_bios_size;
linux_boot = (kernel_filename != NULL);
@ -329,25 +331,47 @@ void pc_init(int ram_size, int vga_ram_size, int boot_device,
cpu_register_physical_memory(0, ram_size, 0);
/* BIOS load */
bios_offset = ram_size + vga_ram_size;
vga_bios_offset = bios_offset + 256 * 1024;
snprintf(buf, sizeof(buf), "%s/%s", bios_dir, BIOS_FILENAME);
ret = load_image(buf, phys_ram_base + 0x000f0000);
if (ret != 0x10000) {
bios_size = get_image_size(buf);
if (bios_size <= 0 ||
(bios_size % 65536) != 0 ||
bios_size > (256 * 1024)) {
goto bios_error;
}
ret = load_image(buf, phys_ram_base + bios_offset);
if (ret != bios_size) {
bios_error:
fprintf(stderr, "qemu: could not load PC bios '%s'\n", buf);
exit(1);
}
/* VGA BIOS load */
if (cirrus_vga_enabled) {
snprintf(buf, sizeof(buf), "%s/%s", bios_dir, VGABIOS_CIRRUS_FILENAME);
} else {
snprintf(buf, sizeof(buf), "%s/%s", bios_dir, VGABIOS_FILENAME);
}
ret = load_image(buf, phys_ram_base + 0x000c0000);
ret = load_image(buf, phys_ram_base + vga_bios_offset);
/* setup basic memory access */
cpu_register_physical_memory(0xc0000, 0x10000, 0xc0000 | IO_MEM_ROM);
cpu_register_physical_memory(0xd0000, 0x20000, IO_MEM_UNASSIGNED);
cpu_register_physical_memory(0xf0000, 0x10000, 0xf0000 | IO_MEM_ROM);
cpu_register_physical_memory(0xc0000, 0x10000,
vga_bios_offset | IO_MEM_ROM);
/* map the last 128KB of the BIOS in ISA space */
isa_bios_size = bios_size;
if (isa_bios_size > (128 * 1024))
isa_bios_size = 128 * 1024;
cpu_register_physical_memory(0xd0000, (192 * 1024) - isa_bios_size,
IO_MEM_UNASSIGNED);
cpu_register_physical_memory(0x100000 - isa_bios_size,
isa_bios_size,
(bios_offset + bios_size - isa_bios_size) | IO_MEM_ROM);
/* map all the bios at the top of memory */
cpu_register_physical_memory((uint32_t)(-bios_size),
bios_size, bios_offset | IO_MEM_ROM);
bochs_bios_init();

12
vl.c
View File

@ -290,6 +290,18 @@ char *pstrcat(char *buf, int buf_size, const char *s)
return buf;
}
/* return the size or -1 if error */
int get_image_size(const char *filename)
{
int fd, size;
fd = open(filename, O_RDONLY | O_BINARY);
if (fd < 0)
return -1;
size = lseek(fd, 0, SEEK_END);
close(fd);
return size;
}
/* return the size or -1 if error */
int load_image(const char *filename, uint8_t *addr)
{

3
vl.h
View File

@ -209,6 +209,7 @@ uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c);
void hw_error(const char *fmt, ...);
int get_image_size(const char *filename);
int load_image(const char *filename, uint8_t *addr);
extern const char *bios_dir;
@ -243,7 +244,7 @@ extern int cirrus_vga_enabled;
#if defined (TARGET_PPC)
#define BIOS_SIZE (512 * 1024)
#else
#define BIOS_SIZE 0
#define BIOS_SIZE ((256 + 64) * 1024)
#endif
/* keyboard/mouse support */