Commit | Line | Data |
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1965aae3 PA |
1 | #ifndef _ASM_X86_EFI_H |
2 | #define _ASM_X86_EFI_H | |
5b83683f | 3 | |
de05764e | 4 | #include <asm/i387.h> |
d2f7cbe7 BP |
5 | /* |
6 | * We map the EFI regions needed for runtime services non-contiguously, | |
7 | * with preserved alignment on virtual addresses starting from -4G down | |
8 | * for a total max space of 64G. This way, we provide for stable runtime | |
9 | * services addresses across kernels so that a kexec'd kernel can still | |
10 | * use them. | |
11 | * | |
12 | * This is the main reason why we're doing stable VA mappings for RT | |
13 | * services. | |
14 | * | |
15 | * This flag is used in conjuction with a chicken bit called | |
16 | * "efi=old_map" which can be used as a fallback to the old runtime | |
17 | * services mapping method in case there's some b0rkage with a | |
18 | * particular EFI implementation (haha, it is hard to hold up the | |
19 | * sarcasm here...). | |
20 | */ | |
21 | #define EFI_OLD_MEMMAP EFI_ARCH_1 | |
22 | ||
b8ff87a6 MF |
23 | #define EFI32_LOADER_SIGNATURE "EL32" |
24 | #define EFI64_LOADER_SIGNATURE "EL64" | |
25 | ||
5b83683f | 26 | #ifdef CONFIG_X86_32 |
e429795c | 27 | |
f7d7d01b | 28 | |
e429795c HY |
29 | extern unsigned long asmlinkage efi_call_phys(void *, ...); |
30 | ||
e429795c HY |
31 | /* |
32 | * Wrap all the virtual calls in a way that forces the parameters on the stack. | |
33 | */ | |
34 | ||
982e239c | 35 | /* Use this macro if your virtual returns a non-void value */ |
e429795c | 36 | #define efi_call_virt(f, args...) \ |
0c6f6abf | 37 | ((efi_##f##_t __attribute__((regparm(0)))*)efi.systab->runtime->f)(args) |
e429795c | 38 | |
982e239c RN |
39 | /* Use this macro if your virtual call does not return any value */ |
40 | #define __efi_call_virt(f, args...) efi_call_virt(f, args) | |
41 | ||
3e8fa263 | 42 | #define efi_ioremap(addr, size, type, attr) ioremap_cache(addr, size) |
e1ad783b | 43 | |
5b83683f HY |
44 | #else /* !CONFIG_X86_32 */ |
45 | ||
62fa6e69 MF |
46 | #define EFI_LOADER_SIGNATURE "EL64" |
47 | ||
48 | extern u64 asmlinkage efi_call(void *fp, ...); | |
49 | ||
50 | #define efi_call_phys(f, args...) efi_call((f), args) | |
51 | ||
52 | #define efi_call_virt(f, ...) \ | |
d2f7cbe7 BP |
53 | ({ \ |
54 | efi_status_t __s; \ | |
55 | \ | |
56 | efi_sync_low_kernel_mappings(); \ | |
57 | preempt_disable(); \ | |
de05764e | 58 | __kernel_fpu_begin(); \ |
62fa6e69 | 59 | __s = efi_call((void *)efi.systab->runtime->f, __VA_ARGS__); \ |
de05764e | 60 | __kernel_fpu_end(); \ |
d2f7cbe7 BP |
61 | preempt_enable(); \ |
62 | __s; \ | |
63 | }) | |
64 | ||
982e239c RN |
65 | /* |
66 | * All X86_64 virt calls return non-void values. Thus, use non-void call for | |
67 | * virt calls that would be void on X86_32. | |
68 | */ | |
69 | #define __efi_call_virt(f, args...) efi_call_virt(f, args) | |
70 | ||
e1ad783b | 71 | extern void __iomem *efi_ioremap(unsigned long addr, unsigned long size, |
3e8fa263 | 72 | u32 type, u64 attribute); |
e1ad783b | 73 | |
5b83683f HY |
74 | #endif /* CONFIG_X86_32 */ |
75 | ||
cbafbc82 | 76 | extern int add_efi_memmap; |
d2f7cbe7 | 77 | extern struct efi_scratch efi_scratch; |
9cd2b07c | 78 | extern void efi_set_executable(efi_memory_desc_t *md, bool executable); |
1adbfa35 | 79 | extern int efi_memblock_x86_reserve_range(void); |
5b83683f HY |
80 | extern void efi_call_phys_prelog(void); |
81 | extern void efi_call_phys_epilog(void); | |
5189c2a7 | 82 | extern void efi_unmap_memmap(void); |
3e8fa263 | 83 | extern void efi_memory_uc(u64 addr, unsigned long size); |
d2f7cbe7 | 84 | extern void __init efi_map_region(efi_memory_desc_t *md); |
3b266496 | 85 | extern void __init efi_map_region_fixed(efi_memory_desc_t *md); |
d2f7cbe7 | 86 | extern void efi_sync_low_kernel_mappings(void); |
b7b898ae BP |
87 | extern int efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages); |
88 | extern void efi_cleanup_page_tables(unsigned long pa_memmap, unsigned num_pages); | |
d2f7cbe7 | 89 | extern void __init old_map_region(efi_memory_desc_t *md); |
c55d016f BP |
90 | extern void __init runtime_code_page_mkexec(void); |
91 | extern void __init efi_runtime_mkexec(void); | |
11cc8512 | 92 | extern void __init efi_dump_pagetable(void); |
a5d90c92 | 93 | extern void __init efi_apply_memmap_quirks(void); |
5b83683f | 94 | |
1fec0533 DY |
95 | struct efi_setup_data { |
96 | u64 fw_vendor; | |
97 | u64 runtime; | |
98 | u64 tables; | |
99 | u64 smbios; | |
100 | u64 reserved[8]; | |
101 | }; | |
102 | ||
103 | extern u64 efi_setup; | |
1fec0533 | 104 | |
6b59e366 ST |
105 | #ifdef CONFIG_EFI |
106 | ||
107 | static inline bool efi_is_native(void) | |
108 | { | |
109 | return IS_ENABLED(CONFIG_X86_64) == efi_enabled(EFI_64BIT); | |
110 | } | |
111 | ||
7d453eee MF |
112 | static inline bool efi_runtime_supported(void) |
113 | { | |
114 | if (efi_is_native()) | |
115 | return true; | |
116 | ||
117 | if (IS_ENABLED(CONFIG_EFI_MIXED) && !efi_enabled(EFI_OLD_MEMMAP)) | |
118 | return true; | |
119 | ||
120 | return false; | |
121 | } | |
122 | ||
72548e83 | 123 | extern struct console early_efi_console; |
5c12af0c | 124 | extern void parse_efi_setup(u64 phys_addr, u32 data_len); |
4f9dbcfc MF |
125 | |
126 | #ifdef CONFIG_EFI_MIXED | |
127 | extern void efi_thunk_runtime_setup(void); | |
128 | extern efi_status_t efi_thunk_set_virtual_address_map( | |
129 | void *phys_set_virtual_address_map, | |
130 | unsigned long memory_map_size, | |
131 | unsigned long descriptor_size, | |
132 | u32 descriptor_version, | |
133 | efi_memory_desc_t *virtual_map); | |
134 | #else | |
135 | static inline void efi_thunk_runtime_setup(void) {} | |
136 | static inline efi_status_t efi_thunk_set_virtual_address_map( | |
137 | void *phys_set_virtual_address_map, | |
138 | unsigned long memory_map_size, | |
139 | unsigned long descriptor_size, | |
140 | u32 descriptor_version, | |
141 | efi_memory_desc_t *virtual_map) | |
142 | { | |
143 | return EFI_SUCCESS; | |
144 | } | |
145 | #endif /* CONFIG_EFI_MIXED */ | |
6b59e366 | 146 | #else |
7f594232 RA |
147 | /* |
148 | * IF EFI is not configured, have the EFI calls return -ENOSYS. | |
149 | */ | |
150 | #define efi_call0(_f) (-ENOSYS) | |
151 | #define efi_call1(_f, _a1) (-ENOSYS) | |
152 | #define efi_call2(_f, _a1, _a2) (-ENOSYS) | |
153 | #define efi_call3(_f, _a1, _a2, _a3) (-ENOSYS) | |
154 | #define efi_call4(_f, _a1, _a2, _a3, _a4) (-ENOSYS) | |
155 | #define efi_call5(_f, _a1, _a2, _a3, _a4, _a5) (-ENOSYS) | |
156 | #define efi_call6(_f, _a1, _a2, _a3, _a4, _a5, _a6) (-ENOSYS) | |
5c12af0c | 157 | static inline void parse_efi_setup(u64 phys_addr, u32 data_len) {} |
7f594232 RA |
158 | #endif /* CONFIG_EFI */ |
159 | ||
1965aae3 | 160 | #endif /* _ASM_X86_EFI_H */ |