diff options
Diffstat (limited to 'arch/i386/boot/edd.c')
-rw-r--r-- | arch/i386/boot/edd.c | 30 |
1 files changed, 1 insertions, 29 deletions
diff --git a/arch/i386/boot/edd.c b/arch/i386/boot/edd.c index 658834d9f92a..d65dd21c09f2 100644 --- a/arch/i386/boot/edd.c +++ b/arch/i386/boot/edd.c | |||
@@ -19,40 +19,12 @@ | |||
19 | 19 | ||
20 | #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) | 20 | #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) |
21 | 21 | ||
22 | struct edd_dapa { | ||
23 | u8 pkt_size; | ||
24 | u8 rsvd; | ||
25 | u16 sector_cnt; | ||
26 | u16 buf_off, buf_seg; | ||
27 | u64 lba; | ||
28 | u64 buf_lin_addr; | ||
29 | }; | ||
30 | |||
31 | /* | 22 | /* |
32 | * Read the MBR (first sector) from a specific device. | 23 | * Read the MBR (first sector) from a specific device. |
33 | */ | 24 | */ |
34 | static int read_mbr(u8 devno, void *buf) | 25 | static int read_mbr(u8 devno, void *buf) |
35 | { | 26 | { |
36 | struct edd_dapa dapa; | 27 | u16 ax, bx, cx, dx; |
37 | u16 ax, bx, cx, dx, si; | ||
38 | |||
39 | memset(&dapa, 0, sizeof dapa); | ||
40 | dapa.pkt_size = sizeof(dapa); | ||
41 | dapa.sector_cnt = 1; | ||
42 | dapa.buf_off = (size_t)buf; | ||
43 | dapa.buf_seg = ds(); | ||
44 | /* dapa.lba = 0; */ | ||
45 | |||
46 | ax = 0x4200; /* Extended Read */ | ||
47 | si = (size_t)&dapa; | ||
48 | dx = devno; | ||
49 | asm("pushfl; stc; int $0x13; setc %%al; popfl" | ||
50 | : "+a" (ax), "+S" (si), "+d" (dx) | ||
51 | : "m" (dapa) | ||
52 | : "ebx", "ecx", "edi", "memory"); | ||
53 | |||
54 | if (!(u8)ax) | ||
55 | return 0; /* OK */ | ||
56 | 28 | ||
57 | ax = 0x0201; /* Legacy Read, one sector */ | 29 | ax = 0x0201; /* Legacy Read, one sector */ |
58 | cx = 0x0001; /* Sector 0-0-1 */ | 30 | cx = 0x0001; /* Sector 0-0-1 */ |