diff options
Diffstat (limited to 'hw/i386/multiboot.c')
| -rw-r--r-- | hw/i386/multiboot.c | 32 |
1 files changed, 27 insertions, 5 deletions
diff --git a/hw/i386/multiboot.c b/hw/i386/multiboot.c index 985ca1ed84..f86d351b3e 100644 --- a/hw/i386/multiboot.c +++ b/hw/i386/multiboot.c @@ -54,6 +54,7 @@ enum { MBI_MODS_COUNT = 20, MBI_MODS_ADDR = 24, MBI_MMAP_ADDR = 48, + MBI_BOOTLOADER = 64, MBI_SIZE = 88, @@ -74,6 +75,7 @@ enum { MULTIBOOT_FLAGS_CMDLINE = 1 << 2, MULTIBOOT_FLAGS_MODULES = 1 << 3, MULTIBOOT_FLAGS_MMAP = 1 << 6, + MULTIBOOT_FLAGS_BOOTLOADER = 1 << 9, }; typedef struct { @@ -87,6 +89,8 @@ typedef struct { hwaddr offset_mbinfo; /* offset in buffer for cmdlines in bytes */ hwaddr offset_cmdlines; + /* offset in buffer for bootloader name in bytes */ + hwaddr offset_bootloader; /* offset of modules in bytes */ hwaddr offset_mods; /* available slots for mb modules infos */ @@ -95,6 +99,8 @@ typedef struct { int mb_mods_count; } MultibootState; +const char *bootloader_name = "qemu"; + static uint32_t mb_add_cmdline(MultibootState *s, const char *cmdline) { hwaddr p = s->offset_cmdlines; @@ -105,6 +111,16 @@ static uint32_t mb_add_cmdline(MultibootState *s, const char *cmdline) return s->mb_buf_phys + p; } +static uint32_t mb_add_bootloader(MultibootState *s, const char *bootloader) +{ + hwaddr p = s->offset_bootloader; + char *b = (char *)s->mb_buf + p; + + memcpy(b, bootloader, strlen(bootloader) + 1); + s->offset_bootloader += strlen(b) + 1; + return s->mb_buf_phys + p; +} + static void mb_add_mod(MultibootState *s, hwaddr start, hwaddr end, hwaddr cmdline_phys) @@ -241,9 +257,10 @@ int load_multiboot(FWCfgState *fw_cfg, mbs.mb_buf_size = TARGET_PAGE_ALIGN(mb_kernel_size); mbs.offset_mbinfo = mbs.mb_buf_size; - /* Calculate space for cmdlines and mb_mods */ + /* Calculate space for cmdlines, bootloader name, and mb_mods */ mbs.mb_buf_size += strlen(kernel_filename) + 1; mbs.mb_buf_size += strlen(kernel_cmdline) + 1; + mbs.mb_buf_size += strlen(bootloader_name) + 1; if (initrd_filename) { const char *r = initrd_filename; mbs.mb_buf_size += strlen(r) + 1; @@ -257,9 +274,11 @@ int load_multiboot(FWCfgState *fw_cfg, mbs.mb_buf_size = TARGET_PAGE_ALIGN(mbs.mb_buf_size); - /* enlarge mb_buf to hold cmdlines and mb-info structs */ - mbs.mb_buf = g_realloc(mbs.mb_buf, mbs.mb_buf_size); - mbs.offset_cmdlines = mbs.offset_mbinfo + mbs.mb_mods_avail * MB_MOD_SIZE; + /* enlarge mb_buf to hold cmdlines, bootloader, mb-info structs */ + mbs.mb_buf = g_realloc(mbs.mb_buf, mbs.mb_buf_size); + mbs.offset_cmdlines = mbs.offset_mbinfo + mbs.mb_mods_avail * MB_MOD_SIZE; + mbs.offset_bootloader = mbs.offset_cmdlines + strlen(kernel_filename) + 1 + + strlen(kernel_cmdline) + 1; if (initrd_filename) { char *next_initrd, not_last; @@ -306,6 +325,8 @@ int load_multiboot(FWCfgState *fw_cfg, kernel_filename, kernel_cmdline); stl_p(bootinfo + MBI_CMDLINE, mb_add_cmdline(&mbs, kcmdline)); + stl_p(bootinfo + MBI_BOOTLOADER, mb_add_bootloader(&mbs, bootloader_name)); + stl_p(bootinfo + MBI_MODS_ADDR, mbs.mb_buf_phys + mbs.offset_mbinfo); stl_p(bootinfo + MBI_MODS_COUNT, mbs.mb_mods_count); /* mods_count */ @@ -314,7 +335,8 @@ int load_multiboot(FWCfgState *fw_cfg, | MULTIBOOT_FLAGS_BOOT_DEVICE | MULTIBOOT_FLAGS_CMDLINE | MULTIBOOT_FLAGS_MODULES - | MULTIBOOT_FLAGS_MMAP); + | MULTIBOOT_FLAGS_MMAP + | MULTIBOOT_FLAGS_BOOTLOADER); stl_p(bootinfo + MBI_BOOT_DEVICE, 0x8000ffff); /* XXX: use the -boot switch? */ stl_p(bootinfo + MBI_MMAP_ADDR, ADDR_E820_MAP); |