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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> |
744937b0 IM |
5 | #include <asm/pgtable.h> |
6 | ||
d2f7cbe7 BP |
7 | /* |
8 | * We map the EFI regions needed for runtime services non-contiguously, | |
9 | * with preserved alignment on virtual addresses starting from -4G down | |
10 | * for a total max space of 64G. This way, we provide for stable runtime | |
11 | * services addresses across kernels so that a kexec'd kernel can still | |
12 | * use them. | |
13 | * | |
14 | * This is the main reason why we're doing stable VA mappings for RT | |
15 | * services. | |
16 | * | |
17 | * This flag is used in conjuction with a chicken bit called | |
18 | * "efi=old_map" which can be used as a fallback to the old runtime | |
19 | * services mapping method in case there's some b0rkage with a | |
20 | * particular EFI implementation (haha, it is hard to hold up the | |
21 | * sarcasm here...). | |
22 | */ | |
23 | #define EFI_OLD_MEMMAP EFI_ARCH_1 | |
24 | ||
b8ff87a6 MF |
25 | #define EFI32_LOADER_SIGNATURE "EL32" |
26 | #define EFI64_LOADER_SIGNATURE "EL64" | |
27 | ||
5b83683f | 28 | #ifdef CONFIG_X86_32 |
e429795c | 29 | |
f7d7d01b | 30 | |
e429795c HY |
31 | extern unsigned long asmlinkage efi_call_phys(void *, ...); |
32 | ||
e429795c HY |
33 | /* |
34 | * Wrap all the virtual calls in a way that forces the parameters on the stack. | |
35 | */ | |
36 | ||
982e239c | 37 | /* Use this macro if your virtual returns a non-void value */ |
e429795c | 38 | #define efi_call_virt(f, args...) \ |
b738c6ea RN |
39 | ({ \ |
40 | efi_status_t __s; \ | |
41 | kernel_fpu_begin(); \ | |
42 | __s = ((efi_##f##_t __attribute__((regparm(0)))*) \ | |
43 | efi.systab->runtime->f)(args); \ | |
44 | kernel_fpu_end(); \ | |
45 | __s; \ | |
46 | }) | |
e429795c | 47 | |
982e239c | 48 | /* Use this macro if your virtual call does not return any value */ |
b738c6ea RN |
49 | #define __efi_call_virt(f, args...) \ |
50 | ({ \ | |
51 | kernel_fpu_begin(); \ | |
52 | ((efi_##f##_t __attribute__((regparm(0)))*) \ | |
53 | efi.systab->runtime->f)(args); \ | |
54 | kernel_fpu_end(); \ | |
55 | }) | |
982e239c | 56 | |
3e8fa263 | 57 | #define efi_ioremap(addr, size, type, attr) ioremap_cache(addr, size) |
e1ad783b | 58 | |
5b83683f HY |
59 | #else /* !CONFIG_X86_32 */ |
60 | ||
62fa6e69 MF |
61 | #define EFI_LOADER_SIGNATURE "EL64" |
62 | ||
63 | extern u64 asmlinkage efi_call(void *fp, ...); | |
64 | ||
65 | #define efi_call_phys(f, args...) efi_call((f), args) | |
66 | ||
67 | #define efi_call_virt(f, ...) \ | |
d2f7cbe7 BP |
68 | ({ \ |
69 | efi_status_t __s; \ | |
70 | \ | |
71 | efi_sync_low_kernel_mappings(); \ | |
72 | preempt_disable(); \ | |
de05764e | 73 | __kernel_fpu_begin(); \ |
62fa6e69 | 74 | __s = efi_call((void *)efi.systab->runtime->f, __VA_ARGS__); \ |
de05764e | 75 | __kernel_fpu_end(); \ |
d2f7cbe7 BP |
76 | preempt_enable(); \ |
77 | __s; \ | |
78 | }) | |
79 | ||
982e239c RN |
80 | /* |
81 | * All X86_64 virt calls return non-void values. Thus, use non-void call for | |
82 | * virt calls that would be void on X86_32. | |
83 | */ | |
84 | #define __efi_call_virt(f, args...) efi_call_virt(f, args) | |
85 | ||
4e78eb05 MK |
86 | extern void __iomem *__init efi_ioremap(unsigned long addr, unsigned long size, |
87 | u32 type, u64 attribute); | |
e1ad783b | 88 | |
5b83683f HY |
89 | #endif /* CONFIG_X86_32 */ |
90 | ||
d2f7cbe7 | 91 | extern struct efi_scratch efi_scratch; |
4e78eb05 MK |
92 | extern void __init efi_set_executable(efi_memory_desc_t *md, bool executable); |
93 | extern int __init efi_memblock_x86_reserve_range(void); | |
744937b0 IM |
94 | extern pgd_t * __init efi_call_phys_prolog(void); |
95 | extern void __init efi_call_phys_epilog(pgd_t *save_pgd); | |
4e78eb05 MK |
96 | extern void __init efi_unmap_memmap(void); |
97 | extern void __init efi_memory_uc(u64 addr, unsigned long size); | |
d2f7cbe7 | 98 | extern void __init efi_map_region(efi_memory_desc_t *md); |
3b266496 | 99 | extern void __init efi_map_region_fixed(efi_memory_desc_t *md); |
d2f7cbe7 | 100 | extern void efi_sync_low_kernel_mappings(void); |
4e78eb05 MK |
101 | extern int __init efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages); |
102 | extern void __init efi_cleanup_page_tables(unsigned long pa_memmap, unsigned num_pages); | |
d2f7cbe7 | 103 | extern void __init old_map_region(efi_memory_desc_t *md); |
c55d016f BP |
104 | extern void __init runtime_code_page_mkexec(void); |
105 | extern void __init efi_runtime_mkexec(void); | |
11cc8512 | 106 | extern void __init efi_dump_pagetable(void); |
a5d90c92 | 107 | extern void __init efi_apply_memmap_quirks(void); |
eeb9db09 ST |
108 | extern int __init efi_reuse_config(u64 tables, int nr_tables); |
109 | extern void efi_delete_dummy_variable(void); | |
5b83683f | 110 | |
1fec0533 DY |
111 | struct efi_setup_data { |
112 | u64 fw_vendor; | |
113 | u64 runtime; | |
114 | u64 tables; | |
115 | u64 smbios; | |
116 | u64 reserved[8]; | |
117 | }; | |
118 | ||
119 | extern u64 efi_setup; | |
1fec0533 | 120 | |
6b59e366 ST |
121 | #ifdef CONFIG_EFI |
122 | ||
123 | static inline bool efi_is_native(void) | |
124 | { | |
125 | return IS_ENABLED(CONFIG_X86_64) == efi_enabled(EFI_64BIT); | |
126 | } | |
127 | ||
7d453eee MF |
128 | static inline bool efi_runtime_supported(void) |
129 | { | |
130 | if (efi_is_native()) | |
131 | return true; | |
132 | ||
133 | if (IS_ENABLED(CONFIG_EFI_MIXED) && !efi_enabled(EFI_OLD_MEMMAP)) | |
134 | return true; | |
135 | ||
136 | return false; | |
137 | } | |
138 | ||
72548e83 | 139 | extern struct console early_efi_console; |
5c12af0c | 140 | extern void parse_efi_setup(u64 phys_addr, u32 data_len); |
4f9dbcfc MF |
141 | |
142 | #ifdef CONFIG_EFI_MIXED | |
143 | extern void efi_thunk_runtime_setup(void); | |
144 | extern efi_status_t efi_thunk_set_virtual_address_map( | |
145 | void *phys_set_virtual_address_map, | |
146 | unsigned long memory_map_size, | |
147 | unsigned long descriptor_size, | |
148 | u32 descriptor_version, | |
149 | efi_memory_desc_t *virtual_map); | |
150 | #else | |
151 | static inline void efi_thunk_runtime_setup(void) {} | |
152 | static inline efi_status_t efi_thunk_set_virtual_address_map( | |
153 | void *phys_set_virtual_address_map, | |
154 | unsigned long memory_map_size, | |
155 | unsigned long descriptor_size, | |
156 | u32 descriptor_version, | |
157 | efi_memory_desc_t *virtual_map) | |
158 | { | |
159 | return EFI_SUCCESS; | |
160 | } | |
161 | #endif /* CONFIG_EFI_MIXED */ | |
f23cf8bd | 162 | |
243b6754 AB |
163 | |
164 | /* arch specific definitions used by the stub code */ | |
165 | ||
166 | struct efi_config { | |
167 | u64 image_handle; | |
168 | u64 table; | |
169 | u64 allocate_pool; | |
170 | u64 allocate_pages; | |
171 | u64 get_memory_map; | |
172 | u64 free_pool; | |
173 | u64 free_pages; | |
174 | u64 locate_handle; | |
175 | u64 handle_protocol; | |
176 | u64 exit_boot_services; | |
177 | u64 text_output; | |
178 | efi_status_t (*call)(unsigned long, ...); | |
179 | bool is64; | |
180 | } __packed; | |
181 | ||
182 | __pure const struct efi_config *__efi_early(void); | |
183 | ||
184 | #define efi_call_early(f, ...) \ | |
185 | __efi_early()->call(__efi_early()->f, __VA_ARGS__); | |
186 | ||
44be28e9 MF |
187 | extern bool efi_reboot_required(void); |
188 | ||
6b59e366 | 189 | #else |
5c12af0c | 190 | static inline void parse_efi_setup(u64 phys_addr, u32 data_len) {} |
44be28e9 MF |
191 | static inline bool efi_reboot_required(void) |
192 | { | |
193 | return false; | |
194 | } | |
7f594232 RA |
195 | #endif /* CONFIG_EFI */ |
196 | ||
1965aae3 | 197 | #endif /* _ASM_X86_EFI_H */ |