2006-03-16 17:59:51 +00:00
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.text
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2007-07-05 12:58:16 +01:00
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.arch i386
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.section ".prefix", "awx", @progbits
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2006-03-16 17:59:51 +00:00
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.code16
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2007-07-05 12:58:16 +01:00
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.org 0
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movw $load_image, %bp
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jmp find_active_partition
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#include "bootpart.S"
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load_image:
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movw $_rom_size, %bp
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1: /* Truncate read length to end of track */
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movzwl %bp, %eax
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movw $1, %ax
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/* Read sectors */
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call *read_sectors
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jc load_failed
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/* Update %es */
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movw %es, %bx
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shll $5, %eax
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addw %ax, %bx
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movw %bx, %es
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shrl $5, %eax
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/* Update LBA address */
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addl %eax, %edi
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adcl $0, %esi
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/* Update CHS address */
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// hmmmm
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/* Loop until whole image is read */
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subw %ax, %bp
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jne 1b
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ljmp $BOOT_SEG, $start_image
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load_failed:
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movw $10f, %si
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jmp boot_error
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10: .asciz "Could not load gPXE\r\n"
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.org 510
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.byte 0x55, 0xaa
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start_image:
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call install
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/* Set up real-mode stack */
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movw %bx, %ss
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movw $_estack16, %sp
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/* Jump to .text16 segment */
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pushw %ax
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pushw $1f
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lret
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.section ".text16", "awx", @progbits
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1:
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pushl $main
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pushw %cs
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call prot_call
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popl %eax /* discard */
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/* Boot next device */
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int $0x18
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