1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * purgatory: setup code
5 * Copyright (C) 2003,2004 Eric Biederman (ebiederm@xmission.com)
6 * Copyright (C) 2014 Red Hat Inc.
8 * This code has been taken from kexec-tools.
10 #include <asm/purgatory.h>
13 .globl purgatory_start
18 /* Load a gdt so I know what the segment registers are */
21 /* load the data segments */
22 movl $0x18, %eax /* data segment */
30 leaq lstack_end(%rip), %rsp
38 gdt: /* 0x00 unusable segment
40 * so use them as the gdt ptr
42 .word gdt_end - gdt - 1
46 /* 0x10 4GB flat code segment */
47 .word 0xFFFF, 0x0000, 0x9A00, 0x00AF
49 /* 0x18 4GB flat data segment */
50 .word 0xFFFF, 0x0000, 0x9200, 0x00CF