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authorH. Peter Anvin <hpa@zytor.com>2016-02-09 18:08:47 -0800
committerH. Peter Anvin <hpa@zytor.com>2016-02-09 18:08:47 -0800
commitf2f897a1762fab84d2905f32b1c15dd7b42abb56 (patch)
treea38f51d3f1fcbf44afddb4736d549c12eaf491be /gpxe/src/arch/i386/prefix/bootpart.S
parent72d2959272b4616f17a97667e6dfa9d06bf109a3 (diff)
downloadsyslinux-f2f897a1762fab84d2905f32b1c15dd7b42abb56.tar.gz
gpxe: delete long since obsolete snapshot of gPXE
gPXE has been deprecated in favor of iPXE for many, many years now. It is much better than users get it directly from the iPXE project, since we should no longer need any special modifications for Syslinux use. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'gpxe/src/arch/i386/prefix/bootpart.S')
-rw-r--r--gpxe/src/arch/i386/prefix/bootpart.S218
1 files changed, 0 insertions, 218 deletions
diff --git a/gpxe/src/arch/i386/prefix/bootpart.S b/gpxe/src/arch/i386/prefix/bootpart.S
deleted file mode 100644
index 968da1a3..00000000
--- a/gpxe/src/arch/i386/prefix/bootpart.S
+++ /dev/null
@@ -1,218 +0,0 @@
-FILE_LICENCE ( GPL2_OR_LATER )
-
-#define BOOT_SEG 0x07c0
-#define EXEC_SEG 0x0100
-#define STACK_SEG 0x0200
-#define STACK_SIZE 0x2000
-
- .text
- .arch i386
- .section ".prefix", "awx", @progbits
- .code16
-
-/*
- * Find active partition
- *
- * Parameters:
- * %dl : BIOS drive number
- * %bp : Active partition handler routine
- */
-find_active_partition:
- /* Set up stack at STACK_SEG:STACK_SIZE */
- movw $STACK_SEG, %ax
- movw %ax, %ss
- movw $STACK_SIZE, %sp
-
- /* Relocate self to EXEC_SEG */
- pushw $BOOT_SEG
- popw %ds
- pushw $EXEC_SEG
- popw %es
- xorw %si, %si
- xorw %di, %di
- movw $0x200, %cx
- rep movsb
- ljmp $EXEC_SEG, $1f
-1: pushw %ds
- popw %es
- pushw %cs
- popw %ds
-
- /* Check for LBA extensions */
- movb $0x41, %ah
- movw $0x55aa, %bx
- stc
- int $0x13
- jc 1f
- cmpw $0xaa55, %bx
- jne 1f
- movw $read_lba, read_sectors
-1:
- /* Read and process root partition table */
- xorb %dh, %dh
- movw $0x0001, %cx
- xorl %esi, %esi
- xorl %edi, %edi
- call process_table
-
- /* Print failure message */
- movw $10f, %si
- 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
-1: lodsb
- testb %al, %al
- je 99f
- int $0x10
- jmp 1b
-99: /* Boot next device */
- int $0x18
-
-/*
- * Process partition table
- *
- * Parameters:
- * %dl : BIOS drive number
- * %dh : Head
- * %cl : Sector (bits 0-5), high two bits of cylinder (bits 6-7)
- * %ch : Low eight bits of cylinder
- * %esi:%edi : LBA address
- * %bp : Active partition handler routine
- *
- * Returns:
- * CF set on error
- */
-process_table:
- pushal
- call read_boot_sector
- jc 99f
- movw $446, %bx
-1: call process_partition
- addw $16, %bx
- cmpw $510, %bx
- jne 1b
-99: popal
- ret
-
-/*
- * Process partition
- *
- * Parameters:
- * %dl : BIOS drive number
- * %dh : Head
- * %cl : Sector (bits 0-5), high two bits of cylinder (bits 6-7)
- * %ch : Low eight bits of cylinder
- * %esi:%edi : LBA address
- * %bx : Offset within partition table
- * %bp : Active partition handler routine
- */
-process_partition:
- pushal
- /* Load C/H/S values from partition entry */
- movb %es:1(%bx), %dh
- movw %es:2(%bx), %cx
- /* Update LBA address from partition entry */
- addl %es:8(%bx), %edi
- adcl $0, %esi
- /* Check active flag */
- testb $0x80, %es:(%bx)
- jz 1f
- call read_boot_sector
- jc 99f
- jmp *%bp
-1: /* Check for extended partition */
- movb %es:4(%bx), %al
- cmpb $0x05, %al
- je 2f
- cmpb $0x0f, %al
- je 2f
- cmpb $0x85, %al
- jne 99f
-2: call process_table
-99: popal
- /* Reload original partition table */
- call read_boot_sector
- ret
-
-/*
- * Read single sector to %es:0000 and verify 0x55aa signature
- *
- * Parameters:
- * %dl : BIOS drive number
- * %dh : Head
- * %cl : Sector (bits 0-5), high two bits of cylinder (bits 6-7)
- * %ch : Low eight bits of cylinder
- * %esi:%edi : LBA address
- *
- * Returns:
- * CF set on error
- */
-read_boot_sector:
- pushw %ax
- movw $1, %ax
- call *read_sectors
- jc 99f
- cmpw $0xaa55, %es:(510)
- je 99f
- stc
-99: popw %ax
- ret
-
-/*
- * Read sectors to %es:0000
- *
- * Parameters:
- * %dl : BIOS drive number
- * %dh : Head
- * %cl : Sector (bits 0-5), high two bits of cylinder (bits 6-7)
- * %ch : Low eight bits of cylinder
- * %esi:%edi : LBA address
- * %ax : Number of sectors (max 127)
- *
- * Returns:
- * CF set on error
- */
-read_sectors: .word read_chs
-
-read_chs:
- /* Read sectors using C/H/S address */
- pushal
- xorw %bx, %bx
- movb $0x02, %ah
- stc
- int $0x13
- sti
- popal
- ret
-
-read_lba:
- /* Read sectors using LBA address */
- pushal
- movw %ax, (lba_desc + 2)
- pushw %es
- popw (lba_desc + 6)
- movl %edi, (lba_desc + 8)
- movl %esi, (lba_desc + 12)
- movw $lba_desc, %si
- movb $0x42, %ah
- int $0x13
- popal
- ret
-
-lba_desc:
- .byte 0x10
- .byte 0
- .word 1
- .word 0x0000
- .word 0x0000
- .long 0, 0