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/rm/header.S */ |
18 | struct { |
19 | u32 ; |
20 | u32 ; |
21 | /* SMP trampoline */ |
22 | u32 ; |
23 | u32 ; |
24 | #ifdef CONFIG_AMD_MEM_ENCRYPT |
25 | u32 ; |
26 | #endif |
27 | #ifdef CONFIG_X86_64 |
28 | u32 ; |
29 | u32 ; |
30 | #endif |
31 | /* ACPI S3 wakeup */ |
32 | #ifdef CONFIG_ACPI_SLEEP |
33 | u32 ; |
34 | u32 ; |
35 | #endif |
36 | /* APM/BIOS reboot */ |
37 | u32 ; |
38 | #ifdef CONFIG_X86_64 |
39 | u32 ; |
40 | #endif |
41 | }; |
42 | |
43 | /* This must match data at realmode/rm/trampoline_{32,64}.S */ |
44 | struct { |
45 | #ifdef CONFIG_X86_32 |
46 | u32 start; |
47 | u16 gdt_pad; |
48 | u16 gdt_limit; |
49 | u32 gdt_base; |
50 | #else |
51 | u64 ; |
52 | u64 ; |
53 | u32 ; |
54 | u32 ; |
55 | u32 ; |
56 | #endif |
57 | }; |
58 | |
59 | extern struct real_mode_header *; |
60 | extern unsigned char real_mode_blob_end[]; |
61 | |
62 | extern unsigned long initial_code; |
63 | extern unsigned long initial_stack; |
64 | #ifdef CONFIG_AMD_MEM_ENCRYPT |
65 | extern unsigned long initial_vc_handler; |
66 | #endif |
67 | |
68 | extern u32 *trampoline_lock; |
69 | |
70 | extern unsigned char real_mode_blob[]; |
71 | extern unsigned char real_mode_relocs[]; |
72 | |
73 | #ifdef CONFIG_X86_32 |
74 | extern unsigned char startup_32_smp[]; |
75 | extern unsigned char boot_gdt[]; |
76 | #else |
77 | extern unsigned char secondary_startup_64[]; |
78 | extern unsigned char secondary_startup_64_no_verify[]; |
79 | #endif |
80 | |
81 | static inline size_t real_mode_size_needed(void) |
82 | { |
83 | if (real_mode_header) |
84 | return 0; /* already allocated. */ |
85 | |
86 | return ALIGN(real_mode_blob_end - real_mode_blob, PAGE_SIZE); |
87 | } |
88 | |
89 | static inline void set_real_mode_mem(phys_addr_t mem) |
90 | { |
91 | real_mode_header = (struct real_mode_header *) __va(mem); |
92 | } |
93 | |
94 | void reserve_real_mode(void); |
95 | void load_trampoline_pgtable(void); |
96 | void init_real_mode(void); |
97 | |
98 | #endif /* __ASSEMBLY__ */ |
99 | |
100 | #endif /* _ARCH_X86_REALMODE_H */ |
101 | |