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-rw-r--r--block.c32
-rw-r--r--block.h1
-rw-r--r--block_int.h3
-rw-r--r--hw/pc.c72
4 files changed, 50 insertions, 58 deletions
diff --git a/block.c b/block.c
index 48229cde7b..0f1734ebca 100644
--- a/block.c
+++ b/block.c
@@ -527,14 +527,6 @@ int bdrv_read(BlockDriverState *bs, int64_t sector_num,
if (!drv)
return -ENOMEDIUM;
- if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) {
- memcpy(buf, bs->boot_sector_data, 512);
- sector_num++;
- nb_sectors--;
- buf += 512;
- if (nb_sectors == 0)
- return 0;
- }
if (drv->bdrv_pread) {
int ret, len;
len = nb_sectors * 512;
@@ -567,9 +559,6 @@ int bdrv_write(BlockDriverState *bs, int64_t sector_num,
return -ENOMEDIUM;
if (bs->read_only)
return -EACCES;
- if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) {
- memcpy(bs->boot_sector_data, buf, 512);
- }
if (drv->bdrv_pwrite) {
int ret, len;
len = nb_sectors * 512;
@@ -750,16 +739,6 @@ void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr)
*nb_sectors_ptr = length;
}
-/* force a given boot sector. */
-void bdrv_set_boot_sector(BlockDriverState *bs, const uint8_t *data, int size)
-{
- bs->boot_sector_enabled = 1;
- if (size > 512)
- size = 512;
- memcpy(bs->boot_sector_data, data, size);
- memset(bs->boot_sector_data + size, 0, 512 - size);
-}
-
void bdrv_set_geometry_hint(BlockDriverState *bs,
int cyls, int heads, int secs)
{
@@ -1155,14 +1134,6 @@ BlockDriverAIOCB *bdrv_aio_read(BlockDriverState *bs, int64_t sector_num,
if (!drv)
return NULL;
- /* XXX: we assume that nb_sectors == 0 is suppored by the async read */
- if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) {
- memcpy(buf, bs->boot_sector_data, 512);
- sector_num++;
- nb_sectors--;
- buf += 512;
- }
-
ret = drv->bdrv_aio_read(bs, sector_num, buf, nb_sectors, cb, opaque);
if (ret) {
@@ -1185,9 +1156,6 @@ BlockDriverAIOCB *bdrv_aio_write(BlockDriverState *bs, int64_t sector_num,
return NULL;
if (bs->read_only)
return NULL;
- if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) {
- memcpy(bs->boot_sector_data, buf, 512);
- }
ret = drv->bdrv_aio_write(bs, sector_num, buf, nb_sectors, cb, opaque);
diff --git a/block.h b/block.h
index 72c1c24bb4..12053d9f1e 100644
--- a/block.h
+++ b/block.h
@@ -79,7 +79,6 @@ int bdrv_truncate(BlockDriverState *bs, int64_t offset);
int64_t bdrv_getlength(BlockDriverState *bs);
void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr);
int bdrv_commit(BlockDriverState *bs);
-void bdrv_set_boot_sector(BlockDriverState *bs, const uint8_t *data, int size);
/* async block I/O */
typedef struct BlockDriverAIOCB BlockDriverAIOCB;
typedef void BlockDriverCompletionFunc(void *opaque, int ret);
diff --git a/block_int.h b/block_int.h
index 7f1a514063..e83fd2c077 100644
--- a/block_int.h
+++ b/block_int.h
@@ -104,9 +104,6 @@ struct BlockDriverState {
BlockDriver *drv; /* NULL means no media */
void *opaque;
- int boot_sector_enabled;
- uint8_t boot_sector_data[512];
-
char filename[1024];
char backing_file[1024]; /* if non zero, the image is a diff of
this file image */
diff --git a/hw/pc.c b/hw/pc.c
index 167d628fca..1486b683a8 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -438,30 +438,45 @@ static void bochs_bios_init(void)
/* Generate an initial boot sector which sets state and jump to
a specified vector */
-static void generate_bootsect(uint32_t gpr[8], uint16_t segs[6], uint16_t ip)
+static void generate_bootsect(uint8_t *option_rom,
+ uint32_t gpr[8], uint16_t segs[6], uint16_t ip)
{
- uint8_t bootsect[512], *p;
+ uint8_t rom[512], *p, *reloc;
+ uint8_t sum;
int i;
- int hda;
- hda = drive_get_index(IF_IDE, 0, 0);
- if (hda == -1) {
- fprintf(stderr, "A disk image must be given for 'hda' when booting "
- "a Linux kernel\n(if you really don't want it, use /dev/zero)\n");
- exit(1);
- }
+ memset(rom, 0, sizeof(rom));
+
+ p = rom;
+ /* Make sure we have an option rom signature */
+ *p++ = 0x55;
+ *p++ = 0xaa;
- memset(bootsect, 0, sizeof(bootsect));
+ /* ROM size in sectors*/
+ *p++ = 1;
- /* Copy the MSDOS partition table if possible */
- bdrv_read(drives_table[hda].bdrv, 0, bootsect, 1);
+ /* Hook int19 */
- /* Make sure we have a partition signature */
- bootsect[510] = 0x55;
- bootsect[511] = 0xaa;
+ *p++ = 0x50; /* push ax */
+ *p++ = 0x1e; /* push ds */
+ *p++ = 0x31; *p++ = 0xc0; /* xor ax, ax */
+ *p++ = 0x8e; *p++ = 0xd8; /* mov ax, ds */
+ *p++ = 0xc7; *p++ = 0x06; /* movvw _start,0x64 */
+ *p++ = 0x64; *p++ = 0x00;
+ reloc = p;
+ *p++ = 0x00; *p++ = 0x00;
+
+ *p++ = 0x8c; *p++ = 0x0e; /* mov cs,0x66 */
+ *p++ = 0x66; *p++ = 0x00;
+
+ *p++ = 0x1f; /* pop ds */
+ *p++ = 0x58; /* pop ax */
+ *p++ = 0xcb; /* lret */
+
/* Actual code */
- p = bootsect;
+ *reloc = (p - rom);
+
*p++ = 0xfa; /* CLI */
*p++ = 0xfc; /* CLD */
@@ -491,7 +506,13 @@ static void generate_bootsect(uint32_t gpr[8], uint16_t segs[6], uint16_t ip)
*p++ = segs[1]; /* CS */
*p++ = segs[1] >> 8;
- bdrv_set_boot_sector(drives_table[hda].bdrv, bootsect, sizeof(bootsect));
+ /* sign rom */
+ sum = 0;
+ for (i = 0; i < (sizeof(rom) - 1); i++)
+ sum += rom[i];
+ rom[sizeof(rom) - 1] = -sum;
+
+ memcpy(option_rom, rom, sizeof(rom));
}
static long get_file_size(FILE *f)
@@ -508,7 +529,8 @@ static long get_file_size(FILE *f)
return size;
}
-static void load_linux(const char *kernel_filename,
+static void load_linux(uint8_t *option_rom,
+ const char *kernel_filename,
const char *initrd_filename,
const char *kernel_cmdline)
{
@@ -658,7 +680,7 @@ static void load_linux(const char *kernel_filename,
memset(gpr, 0, sizeof gpr);
gpr[4] = cmdline_addr-real_addr-16; /* SP (-16 is paranoia) */
- generate_bootsect(gpr, seg, 0);
+ generate_bootsect(option_rom, gpr, seg, 0);
}
static void main_cpu_reset(void *opaque)
@@ -862,6 +884,15 @@ static void pc_init1(ram_addr_t ram_size, int vga_ram_size,
int size, offset;
offset = 0;
+ if (linux_boot) {
+ option_rom_offset = qemu_ram_alloc(TARGET_PAGE_SIZE);
+ load_linux(phys_ram_base + option_rom_offset,
+ kernel_filename, initrd_filename, kernel_cmdline);
+ cpu_register_physical_memory(0xd0000, TARGET_PAGE_SIZE,
+ option_rom_offset | IO_MEM_ROM);
+ offset = TARGET_PAGE_SIZE;
+ }
+
for (i = 0; i < nb_option_roms; i++) {
size = get_image_size(option_rom[i]);
if (size < 0) {
@@ -891,9 +922,6 @@ static void pc_init1(ram_addr_t ram_size, int vga_ram_size,
bochs_bios_init();
- if (linux_boot)
- load_linux(kernel_filename, initrd_filename, kernel_cmdline);
-
cpu_irq = qemu_allocate_irqs(pic_irq_request, NULL, 1);
i8259 = i8259_init(cpu_irq[0]);
ferr_irq = i8259[13];
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-27 01:13:11 +0000