1#ifndef _ARCH_X86_REALMODE_H
2#define _ARCH_X86_REALMODE_H
3
4#include <linux/types.h>
5#include <asm/io.h>
6
7/* This must match data at realmode.S */
8struct real_mode_header {
9	u32	text_start;
10	u32	ro_end;
11	/* SMP trampoline */
12	u32	trampoline_start;
13	u32	trampoline_status;
14	u32	trampoline_header;
15#ifdef CONFIG_X86_64
16	u32	trampoline_pgd;
17#endif
18	/* ACPI S3 wakeup */
19#ifdef CONFIG_ACPI_SLEEP
20	u32	wakeup_start;
21	u32	wakeup_header;
22#endif
23	/* APM/BIOS reboot */
24	u32	machine_real_restart_asm;
25#ifdef CONFIG_X86_64
26	u32	machine_real_restart_seg;
27#endif
28};
29
30/* This must match data at trampoline_32/64.S */
31struct trampoline_header {
32#ifdef CONFIG_X86_32
33	u32 start;
34	u16 gdt_pad;
35	u16 gdt_limit;
36	u32 gdt_base;
37#else
38	u64 start;
39	u64 efer;
40	u32 cr4;
41#endif
42};
43
44extern struct real_mode_header *real_mode_header;
45extern unsigned char real_mode_blob_end[];
46
47extern unsigned long init_rsp;
48extern unsigned long initial_code;
49extern unsigned long initial_gs;
50
51extern unsigned char real_mode_blob[];
52extern unsigned char real_mode_relocs[];
53
54#ifdef CONFIG_X86_32
55extern unsigned char startup_32_smp[];
56extern unsigned char boot_gdt[];
57#else
58extern unsigned char secondary_startup_64[];
59#endif
60
61void reserve_real_mode(void);
62void setup_real_mode(void);
63
64#endif /* _ARCH_X86_REALMODE_H */
65