diff options
Diffstat (limited to 'qemu/roms/ipxe/src/arch/i386/prefix/nbiprefix.S')
| -rw-r--r-- | qemu/roms/ipxe/src/arch/i386/prefix/nbiprefix.S | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/qemu/roms/ipxe/src/arch/i386/prefix/nbiprefix.S b/qemu/roms/ipxe/src/arch/i386/prefix/nbiprefix.S new file mode 100644 index 000000000..06e7df5b7 --- /dev/null +++ b/qemu/roms/ipxe/src/arch/i386/prefix/nbiprefix.S @@ -0,0 +1,82 @@ + .text + .arch i386 + .code16 + .section ".prefix", "ax", @progbits + .org 0 + +nbi_header: + +/***************************************************************************** + * NBI file header + ***************************************************************************** + */ +file_header: + .long 0x1b031336 /* Signature */ + .byte 0x04 /* 16 bytes header, no vendor info */ + .byte 0 + .byte 0 + .byte 0 /* No flags */ + .word 0x0000, 0x07c0 /* Load header to 0x07c0:0x0000 */ + .word _nbi_start, 0x07c0 /* Start execution at 0x07c0:entry */ + .size file_header, . - file_header + +/***************************************************************************** + * NBI segment header + ***************************************************************************** + */ +segment_header: + .byte 0x04 /* 16 bytes header, no vendor info */ + .byte 0 + .byte 0 + .byte 0x04 /* Last segment */ + .long 0x00007e00 +imglen: .long -512 +memlen: .long -512 + .size segment_header, . - segment_header + + .section ".zinfo.fixup", "a", @progbits /* Compressor fixups */ + .ascii "ADDL" + .long imglen + .long 1 + .long 0 + .ascii "ADDL" + .long memlen + .long 1 + .long 0 + .previous + +/***************************************************************************** + * NBI entry point + ***************************************************************************** + */ + .globl _nbi_start +_nbi_start: + /* Install iPXE */ + call install + + /* 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: + pushl $main + pushw %cs + call prot_call + popl %ecx /* discard */ + + /* Uninstall iPXE */ + call uninstall + + /* Reboot system */ + int $0x19 + + .previous + .size _nbi_start, . - _nbi_start + +nbi_header_end: + .org 512 |