Commit | Line | Data |
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1965aae3 PA |
1 | #ifndef _ASM_X86_EFI_H |
2 | #define _ASM_X86_EFI_H | |
5b83683f | 3 | |
df6b35f4 | 4 | #include <asm/fpu/api.h> |
744937b0 | 5 | #include <asm/pgtable.h> |
9788375d | 6 | #include <asm/processor-flags.h> |
c9f2a9a6 | 7 | #include <asm/tlb.h> |
744937b0 | 8 | |
d2f7cbe7 BP |
9 | /* |
10 | * We map the EFI regions needed for runtime services non-contiguously, | |
11 | * with preserved alignment on virtual addresses starting from -4G down | |
12 | * for a total max space of 64G. This way, we provide for stable runtime | |
13 | * services addresses across kernels so that a kexec'd kernel can still | |
14 | * use them. | |
15 | * | |
16 | * This is the main reason why we're doing stable VA mappings for RT | |
17 | * services. | |
18 | * | |
19 | * This flag is used in conjuction with a chicken bit called | |
20 | * "efi=old_map" which can be used as a fallback to the old runtime | |
21 | * services mapping method in case there's some b0rkage with a | |
22 | * particular EFI implementation (haha, it is hard to hold up the | |
23 | * sarcasm here...). | |
24 | */ | |
25 | #define EFI_OLD_MEMMAP EFI_ARCH_1 | |
26 | ||
b8ff87a6 MF |
27 | #define EFI32_LOADER_SIGNATURE "EL32" |
28 | #define EFI64_LOADER_SIGNATURE "EL64" | |
29 | ||
48fcb2d0 AB |
30 | #define MAX_CMDLINE_ADDRESS UINT_MAX |
31 | ||
9788375d | 32 | #define ARCH_EFI_IRQ_FLAGS_MASK X86_EFLAGS_IF |
e429795c | 33 | |
9788375d | 34 | #ifdef CONFIG_X86_32 |
f7d7d01b | 35 | |
e429795c HY |
36 | extern unsigned long asmlinkage efi_call_phys(void *, ...); |
37 | ||
bc25f9db MR |
38 | #define arch_efi_call_virt_setup() kernel_fpu_begin() |
39 | #define arch_efi_call_virt_teardown() kernel_fpu_end() | |
40 | ||
e429795c HY |
41 | /* |
42 | * Wrap all the virtual calls in a way that forces the parameters on the stack. | |
43 | */ | |
80e75596 | 44 | #define arch_efi_call_virt(p, f, args...) \ |
b738c6ea | 45 | ({ \ |
80e75596 | 46 | ((efi_##f##_t __attribute__((regparm(0)))*) p->f)(args); \ |
b738c6ea | 47 | }) |
982e239c | 48 | |
3e8fa263 | 49 | #define efi_ioremap(addr, size, type, attr) ioremap_cache(addr, size) |
e1ad783b | 50 | |
5b83683f HY |
51 | #else /* !CONFIG_X86_32 */ |
52 | ||
62fa6e69 MF |
53 | #define EFI_LOADER_SIGNATURE "EL64" |
54 | ||
55 | extern u64 asmlinkage efi_call(void *fp, ...); | |
56 | ||
57 | #define efi_call_phys(f, args...) efi_call((f), args) | |
58 | ||
c9f2a9a6 MF |
59 | /* |
60 | * Scratch space used for switching the pagetable in the EFI stub | |
61 | */ | |
62 | struct efi_scratch { | |
63 | u64 r15; | |
64 | u64 prev_cr3; | |
65 | pgd_t *efi_pgt; | |
66 | bool use_pgd; | |
67 | u64 phys_stack; | |
68 | } __packed; | |
69 | ||
bc25f9db | 70 | #define arch_efi_call_virt_setup() \ |
d2f7cbe7 | 71 | ({ \ |
d2f7cbe7 BP |
72 | efi_sync_low_kernel_mappings(); \ |
73 | preempt_disable(); \ | |
de05764e | 74 | __kernel_fpu_begin(); \ |
c9f2a9a6 MF |
75 | \ |
76 | if (efi_scratch.use_pgd) { \ | |
77 | efi_scratch.prev_cr3 = read_cr3(); \ | |
78 | write_cr3((unsigned long)efi_scratch.efi_pgt); \ | |
79 | __flush_tlb_all(); \ | |
80 | } \ | |
bc25f9db MR |
81 | }) |
82 | ||
80e75596 AT |
83 | #define arch_efi_call_virt(p, f, args...) \ |
84 | efi_call((void *)p->f, args) \ | |
bc25f9db MR |
85 | |
86 | #define arch_efi_call_virt_teardown() \ | |
87 | ({ \ | |
c9f2a9a6 MF |
88 | if (efi_scratch.use_pgd) { \ |
89 | write_cr3(efi_scratch.prev_cr3); \ | |
90 | __flush_tlb_all(); \ | |
91 | } \ | |
92 | \ | |
de05764e | 93 | __kernel_fpu_end(); \ |
d2f7cbe7 | 94 | preempt_enable(); \ |
d2f7cbe7 BP |
95 | }) |
96 | ||
4e78eb05 MK |
97 | extern void __iomem *__init efi_ioremap(unsigned long addr, unsigned long size, |
98 | u32 type, u64 attribute); | |
e1ad783b | 99 | |
a523841e | 100 | #ifdef CONFIG_KASAN |
769a8089 AR |
101 | /* |
102 | * CONFIG_KASAN may redefine memset to __memset. __memset function is present | |
103 | * only in kernel binary. Since the EFI stub linked into a separate binary it | |
104 | * doesn't have __memset(). So we should use standard memset from | |
105 | * arch/x86/boot/compressed/string.c. The same applies to memcpy and memmove. | |
106 | */ | |
107 | #undef memcpy | |
108 | #undef memset | |
109 | #undef memmove | |
a523841e | 110 | #endif |
769a8089 | 111 | |
5b83683f HY |
112 | #endif /* CONFIG_X86_32 */ |
113 | ||
d2f7cbe7 | 114 | extern struct efi_scratch efi_scratch; |
4e78eb05 MK |
115 | extern void __init efi_set_executable(efi_memory_desc_t *md, bool executable); |
116 | extern int __init efi_memblock_x86_reserve_range(void); | |
744937b0 IM |
117 | extern pgd_t * __init efi_call_phys_prolog(void); |
118 | extern void __init efi_call_phys_epilog(pgd_t *save_pgd); | |
0bbea1ce | 119 | extern void __init efi_print_memmap(void); |
4e78eb05 MK |
120 | extern void __init efi_unmap_memmap(void); |
121 | extern void __init efi_memory_uc(u64 addr, unsigned long size); | |
d2f7cbe7 | 122 | extern void __init efi_map_region(efi_memory_desc_t *md); |
3b266496 | 123 | extern void __init efi_map_region_fixed(efi_memory_desc_t *md); |
d2f7cbe7 | 124 | extern void efi_sync_low_kernel_mappings(void); |
67a9108e | 125 | extern int __init efi_alloc_page_tables(void); |
4e78eb05 | 126 | extern int __init efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages); |
d2f7cbe7 | 127 | extern void __init old_map_region(efi_memory_desc_t *md); |
c55d016f | 128 | extern void __init runtime_code_page_mkexec(void); |
6d0cc887 | 129 | extern void __init efi_runtime_update_mappings(void); |
11cc8512 | 130 | extern void __init efi_dump_pagetable(void); |
a5d90c92 | 131 | extern void __init efi_apply_memmap_quirks(void); |
eeb9db09 ST |
132 | extern int __init efi_reuse_config(u64 tables, int nr_tables); |
133 | extern void efi_delete_dummy_variable(void); | |
5b83683f | 134 | |
1fec0533 DY |
135 | struct efi_setup_data { |
136 | u64 fw_vendor; | |
137 | u64 runtime; | |
138 | u64 tables; | |
139 | u64 smbios; | |
140 | u64 reserved[8]; | |
141 | }; | |
142 | ||
143 | extern u64 efi_setup; | |
1fec0533 | 144 | |
6b59e366 ST |
145 | #ifdef CONFIG_EFI |
146 | ||
147 | static inline bool efi_is_native(void) | |
148 | { | |
149 | return IS_ENABLED(CONFIG_X86_64) == efi_enabled(EFI_64BIT); | |
150 | } | |
151 | ||
7d453eee MF |
152 | static inline bool efi_runtime_supported(void) |
153 | { | |
154 | if (efi_is_native()) | |
155 | return true; | |
156 | ||
157 | if (IS_ENABLED(CONFIG_EFI_MIXED) && !efi_enabled(EFI_OLD_MEMMAP)) | |
158 | return true; | |
159 | ||
160 | return false; | |
161 | } | |
162 | ||
72548e83 | 163 | extern struct console early_efi_console; |
5c12af0c | 164 | extern void parse_efi_setup(u64 phys_addr, u32 data_len); |
4f9dbcfc | 165 | |
21289ec0 AB |
166 | extern void efifb_setup_from_dmi(struct screen_info *si, const char *opt); |
167 | ||
4f9dbcfc MF |
168 | #ifdef CONFIG_EFI_MIXED |
169 | extern void efi_thunk_runtime_setup(void); | |
170 | extern efi_status_t efi_thunk_set_virtual_address_map( | |
171 | void *phys_set_virtual_address_map, | |
172 | unsigned long memory_map_size, | |
173 | unsigned long descriptor_size, | |
174 | u32 descriptor_version, | |
175 | efi_memory_desc_t *virtual_map); | |
176 | #else | |
177 | static inline void efi_thunk_runtime_setup(void) {} | |
178 | static inline efi_status_t efi_thunk_set_virtual_address_map( | |
179 | void *phys_set_virtual_address_map, | |
180 | unsigned long memory_map_size, | |
181 | unsigned long descriptor_size, | |
182 | u32 descriptor_version, | |
183 | efi_memory_desc_t *virtual_map) | |
184 | { | |
185 | return EFI_SUCCESS; | |
186 | } | |
187 | #endif /* CONFIG_EFI_MIXED */ | |
f23cf8bd | 188 | |
243b6754 AB |
189 | |
190 | /* arch specific definitions used by the stub code */ | |
191 | ||
192 | struct efi_config { | |
193 | u64 image_handle; | |
194 | u64 table; | |
195 | u64 allocate_pool; | |
196 | u64 allocate_pages; | |
197 | u64 get_memory_map; | |
198 | u64 free_pool; | |
199 | u64 free_pages; | |
200 | u64 locate_handle; | |
201 | u64 handle_protocol; | |
202 | u64 exit_boot_services; | |
203 | u64 text_output; | |
204 | efi_status_t (*call)(unsigned long, ...); | |
205 | bool is64; | |
206 | } __packed; | |
207 | ||
208 | __pure const struct efi_config *__efi_early(void); | |
209 | ||
210 | #define efi_call_early(f, ...) \ | |
211 | __efi_early()->call(__efi_early()->f, __VA_ARGS__); | |
212 | ||
2c23b73c AB |
213 | #define __efi_call_early(f, ...) \ |
214 | __efi_early()->call((unsigned long)f, __VA_ARGS__); | |
215 | ||
216 | #define efi_is_64bit() __efi_early()->is64 | |
217 | ||
44be28e9 MF |
218 | extern bool efi_reboot_required(void); |
219 | ||
6b59e366 | 220 | #else |
5c12af0c | 221 | static inline void parse_efi_setup(u64 phys_addr, u32 data_len) {} |
44be28e9 MF |
222 | static inline bool efi_reboot_required(void) |
223 | { | |
224 | return false; | |
225 | } | |
7f594232 RA |
226 | #endif /* CONFIG_EFI */ |
227 | ||
1965aae3 | 228 | #endif /* _ASM_X86_EFI_H */ |