1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _ARCH_X86_REALMODE_H |
3 | #define _ARCH_X86_REALMODE_H |
4 | |
5 | /* |
6 | * Flag bit definitions for use with the flags field of the trampoline header |
7 | * in the CONFIG_X86_64 variant. |
8 | */ |
9 | #define TH_FLAGS_SME_ACTIVE_BIT 0 |
10 | #define TH_FLAGS_SME_ACTIVE BIT(TH_FLAGS_SME_ACTIVE_BIT) |
11 | |
12 | #ifndef __ASSEMBLY__ |
13 | |
14 | #include <linux/types.h> |
15 | #include <asm/io.h> |
16 | |
17 | /* This must match data at realmode.S */ |
18 | struct { |
19 | u32 ; |
20 | u32 ; |
21 | /* SMP trampoline */ |
22 | u32 ; |
23 | u32 ; |
24 | u32 ; |
25 | #ifdef CONFIG_X86_64 |
26 | u32 ; |
27 | #endif |
28 | /* ACPI S3 wakeup */ |
29 | #ifdef CONFIG_ACPI_SLEEP |
30 | u32 ; |
31 | u32 ; |
32 | #endif |
33 | /* APM/BIOS reboot */ |
34 | u32 ; |
35 | #ifdef CONFIG_X86_64 |
36 | u32 ; |
37 | #endif |
38 | }; |
39 | |
40 | /* This must match data at trampoline_32/64.S */ |
41 | struct { |
42 | #ifdef CONFIG_X86_32 |
43 | u32 start; |
44 | u16 gdt_pad; |
45 | u16 gdt_limit; |
46 | u32 gdt_base; |
47 | #else |
48 | u64 ; |
49 | u64 ; |
50 | u32 ; |
51 | u32 ; |
52 | #endif |
53 | }; |
54 | |
55 | extern struct real_mode_header *; |
56 | extern unsigned char real_mode_blob_end[]; |
57 | |
58 | extern unsigned long initial_code; |
59 | extern unsigned long initial_gs; |
60 | extern unsigned long initial_stack; |
61 | |
62 | extern unsigned char real_mode_blob[]; |
63 | extern unsigned char real_mode_relocs[]; |
64 | |
65 | #ifdef CONFIG_X86_32 |
66 | extern unsigned char startup_32_smp[]; |
67 | extern unsigned char boot_gdt[]; |
68 | #else |
69 | extern unsigned char secondary_startup_64[]; |
70 | #endif |
71 | |
72 | static inline size_t real_mode_size_needed(void) |
73 | { |
74 | if (real_mode_header) |
75 | return 0; /* already allocated. */ |
76 | |
77 | return ALIGN(real_mode_blob_end - real_mode_blob, PAGE_SIZE); |
78 | } |
79 | |
80 | void set_real_mode_mem(phys_addr_t mem, size_t size); |
81 | void reserve_real_mode(void); |
82 | |
83 | #endif /* __ASSEMBLY__ */ |
84 | |
85 | #endif /* _ARCH_X86_REALMODE_H */ |
86 | |