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| author | Michael Brown | 2007-07-05 13:58:16 +0200 |
|---|---|---|
| committer | Michael Brown | 2007-07-05 13:58:16 +0200 |
| commit | 66208dd65d41e0babe27d270917fe71674102884 (patch) | |
| tree | b47d5f2134cf8a05ff441cb284f004e846f29cd3 /src/arch/i386/prefix/bootpart.S | |
| parent | Miscellaneous efficiency improvements, and extend read_sectors to (diff) | |
| download | ipxe-66208dd65d41e0babe27d270917fe71674102884.tar.gz ipxe-66208dd65d41e0babe27d270917fe71674102884.tar.xz ipxe-66208dd65d41e0babe27d270917fe71674102884.zip | |
hdprefix that works for LBA only
Diffstat (limited to 'src/arch/i386/prefix/bootpart.S')
| -rw-r--r-- | src/arch/i386/prefix/bootpart.S | 33 |
1 files changed, 21 insertions, 12 deletions
diff --git a/src/arch/i386/prefix/bootpart.S b/src/arch/i386/prefix/bootpart.S index 22ad3e3a..d60fe9bc 100644 --- a/src/arch/i386/prefix/bootpart.S +++ b/src/arch/i386/prefix/bootpart.S @@ -44,7 +44,7 @@ find_active_partition: jc 1f cmpw $0xaa55, %bx jne 1f - movw $read_lba, read_sector + movw $read_lba, read_sectors 1: /* Read and process root partition table */ xorb %dh, %dh @@ -55,17 +55,26 @@ find_active_partition: /* Print failure message */ movw $10f, %si - movw $(20f-10f), %cx -1: movw $0x0007, %bx + jmp boot_error +10: .asciz "Could not locate active partition\r\n" + +/* + * Print failure message and boot next device + * + * Parameters: + * %si : Failure string + */ +boot_error: + cld + movw $0x0007, %bx movb $0x0e, %ah - lodsb +1: lodsb + testb %al, %al + je 99f int $0x10 - loop 1b - - /* Boot next device */ + jmp 1b +99: /* Boot next device */ int $0x18 -10: .ascii "Could not locate active partition\r\n" -20: /* * Process partition table @@ -149,7 +158,7 @@ process_partition: read_boot_sector: pushw %ax movw $1, %ax - call *read_sector + call *read_sectors jc 99f cmpw $0xaa55, %es:(510) je 99f @@ -158,7 +167,7 @@ read_boot_sector: ret /* - * Read single sector to %es:0000 and verify 0x55aa signature + * Read sectors to %es:0000 * * Parameters: * %dl : BIOS drive number @@ -171,7 +180,7 @@ read_boot_sector: * Returns: * CF set on error */ -read_sector: .word read_chs +read_sectors: .word read_chs read_chs: /* Read sectors using C/H/S address */ |