diff options
Diffstat (limited to 'qemu/roms/ipxe/src/arch/i386/prefix/lkrnprefix.S')
| -rw-r--r-- | qemu/roms/ipxe/src/arch/i386/prefix/lkrnprefix.S | 236 |
1 files changed, 0 insertions, 236 deletions
diff --git a/qemu/roms/ipxe/src/arch/i386/prefix/lkrnprefix.S b/qemu/roms/ipxe/src/arch/i386/prefix/lkrnprefix.S deleted file mode 100644 index 64135e14b..000000000 --- a/qemu/roms/ipxe/src/arch/i386/prefix/lkrnprefix.S +++ /dev/null @@ -1,236 +0,0 @@ -FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ) - -#define BZI_LOAD_HIGH_ADDR 0x100000 - - .text - .arch i386 - .code16 - .section ".prefix", "ax", @progbits - .globl _lkrn_start -_lkrn_start: - -/***************************************************************************** - * - * Kernel header - * - * We place our prefix (i.e. our .prefix and .text16.early sections) - * within the bzImage real-mode portion which gets loaded at - * 1000:0000, and our payload (i.e. everything else) within the - * bzImage protected-mode portion which gets loaded at 0x100000 - * upwards. - * - */ - - .org 0x1f1 -setup_sects: - .byte -1 /* Allow for initial "boot sector" */ - .section ".zinfo.fixup", "a", @progbits /* Compressor fixups */ - .ascii "ADHL" - .long setup_sects - .long 512 - .long 0 - .previous -root_flags: - .word 0 -syssize: - .long 0 - .section ".zinfo.fixup", "a", @progbits /* Compressor fixups */ - .ascii "ADPL" - .long syssize - .long 16 - .long 0 - .previous -ram_size: - .word 0 -vid_mode: - .word 0 -root_dev: - .word 0 -boot_flag: - .word 0xaa55 -jump: - /* Manually specify a two-byte jmp instruction here rather - * than leaving it up to the assembler. - */ - .byte 0xeb, ( setup - header ) -header: - .byte 'H', 'd', 'r', 'S' -version: - .word 0x0207 /* 2.07 */ -realmode_swtch: - .long 0 -start_sys: - .word 0 -kernel_version: - .word version_string - 0x200 -type_of_loader: - .byte 0 -loadflags: - .byte 0x01 /* LOADED_HIGH */ -setup_move_size: - .word 0 -code32_start: - .long 0 -ramdisk_image: - .long 0 -ramdisk_size: - .long 0 -bootsect_kludge: - .long 0 -heap_end_ptr: - .word 0 -ext_loader_ver: - .byte 0 -ext_loader_type: - .byte 0 -cmd_line_ptr: - .long 0 -initrd_addr_max: - .long 0xffffffff -kernel_alignment: - .long 0 -relocatable_kernel: - .byte 0 -min_alignment: - .byte 0 -xloadflags: - .word 0 -cmdline_size: - .long 0x7ff -hardware_subarch: - .long 0 -hardware_subarch_data: - .byte 0, 0, 0, 0, 0, 0, 0, 0 - -version_string: - .asciz VERSION - -/***************************************************************************** - * - * Setup code - * - */ - -setup: - /* Fix up code segment */ - pushw %ds - pushw $1f - lret -1: - /* Set up stack just below 0x7c00 and clear direction flag */ - xorw %ax, %ax - movw %ax, %ss - movw $0x7c00, %sp - cld - - /* Retrieve command-line pointer */ - movl cmd_line_ptr, %edx - testl %edx, %edx - jz no_cmd_line - - /* Set up %es:%di to point to command line */ - movl %edx, %edi - andl $0xf, %edi - rorl $4, %edx - movw %dx, %es - - /* Find length of command line */ - pushw %di - movw $0xffff, %cx - repnz scasb - notw %cx - popw %si - - /* Make space for command line on stack */ - movw %sp, %di - subw %cx, %di - andw $~0xf, %di - movw %di, %sp - - /* Copy command line to stack */ - pushw %ds - pushw %es - popw %ds - pushw %ss - popw %es - rep movsb - popw %ds - - /* Store new command-line pointer */ - movzwl %sp, %edx -no_cmd_line: - - /* Calculate maximum relocation address */ - movl ramdisk_image, %ebp - testl %ebp, %ebp - jnz 1f - orl $0xffffffff, %ebp /* Allow arbitrary relocation if no initrd */ -1: - /* Install iPXE */ - call alloc_basemem - xorl %esi, %esi - xorl %edi, %edi - call install_prealloc - - /* Set up real-mode stack */ - movw %bx, %ss - movw $_estack16, %sp - - /* Jump to .text16 segment */ - pushw %ax - pushw $1f - lret - .section ".text16", "awx", @progbits -1: - /* Retrieve initrd pointer and size */ - movl ramdisk_image, %ebp - movl ramdisk_size, %ecx - - /* Set up %ds for access to .data16 */ - movw %bx, %ds - - /* Store command-line pointer */ - movl %edx, cmdline_phys - - /* Store initrd pointer and size */ - movl %ebp, initrd_phys - movl %ecx, initrd_len - - /* Run iPXE */ - pushl $main - pushw %cs - call prot_call - popl %ecx /* discard */ - - /* Uninstall iPXE */ - call uninstall - - /* Boot next device */ - int $0x18 - -/***************************************************************************** - * - * Open payload (called by libprefix) - * - * Parameters: - * %ds:0000 : Prefix - * %esi : Buffer for copy of image source (or zero if no buffer available) - * %ecx : Expected offset within buffer of first payload block - * Returns: - * %esi : Valid image source address (buffered or unbuffered) - * %ecx : Actual offset within buffer of first payload block - * CF set on error - */ - - .section ".text16.early", "awx", @progbits - .globl open_payload -open_payload: - - /* Our payload will always end up at BZI_LOAD_HIGH_ADDR */ - movl $BZI_LOAD_HIGH_ADDR, %esi - xorl %ecx, %ecx - lret - - /* Payload must be aligned to a whole number of setup sectors */ - .globl _payload_align - .equ _payload_align, 512 |