H. Peter Anvin | 1965aae | 2008-10-22 22:26:29 -0700 | [diff] [blame] | 1 | #ifndef _ASM_X86_EFI_H |
| 2 | #define _ASM_X86_EFI_H |
Huang, Ying | 5b83683 | 2008-01-30 13:31:19 +0100 | [diff] [blame] | 3 | |
Ricardo Neri | de05764 | 2014-03-27 15:10:42 -0700 | [diff] [blame^] | 4 | #include <asm/i387.h> |
Borislav Petkov | d2f7cbe | 2013-10-31 17:25:08 +0100 | [diff] [blame] | 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 | |
Matt Fleming | b8ff87a | 2014-01-10 15:54:31 +0000 | [diff] [blame] | 23 | #define EFI32_LOADER_SIGNATURE "EL32" |
| 24 | #define EFI64_LOADER_SIGNATURE "EL64" |
| 25 | |
Huang, Ying | 5b83683 | 2008-01-30 13:31:19 +0100 | [diff] [blame] | 26 | #ifdef CONFIG_X86_32 |
Huang, Ying | e429795 | 2008-01-30 13:31:19 +0100 | [diff] [blame] | 27 | |
Matt Fleming | f7d7d01 | 2011-11-15 12:56:14 +0000 | [diff] [blame] | 28 | |
Huang, Ying | e429795 | 2008-01-30 13:31:19 +0100 | [diff] [blame] | 29 | extern unsigned long asmlinkage efi_call_phys(void *, ...); |
| 30 | |
Huang, Ying | e429795 | 2008-01-30 13:31:19 +0100 | [diff] [blame] | 31 | /* |
| 32 | * Wrap all the virtual calls in a way that forces the parameters on the stack. |
| 33 | */ |
| 34 | |
Ricardo Neri | 982e239 | 2014-03-27 15:10:41 -0700 | [diff] [blame] | 35 | /* Use this macro if your virtual returns a non-void value */ |
Huang, Ying | e429795 | 2008-01-30 13:31:19 +0100 | [diff] [blame] | 36 | #define efi_call_virt(f, args...) \ |
Joe Perches | 0c6f6ab | 2008-03-23 01:02:07 -0700 | [diff] [blame] | 37 | ((efi_##f##_t __attribute__((regparm(0)))*)efi.systab->runtime->f)(args) |
Huang, Ying | e429795 | 2008-01-30 13:31:19 +0100 | [diff] [blame] | 38 | |
Ricardo Neri | 982e239 | 2014-03-27 15:10:41 -0700 | [diff] [blame] | 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 | |
Matt Fleming | 3e8fa26 | 2012-10-19 13:25:46 +0100 | [diff] [blame] | 42 | #define efi_ioremap(addr, size, type, attr) ioremap_cache(addr, size) |
Keith Packard | e1ad783 | 2011-12-11 16:12:42 -0800 | [diff] [blame] | 43 | |
Huang, Ying | 5b83683 | 2008-01-30 13:31:19 +0100 | [diff] [blame] | 44 | #else /* !CONFIG_X86_32 */ |
| 45 | |
Matt Fleming | 62fa6e6 | 2014-03-27 15:10:39 -0700 | [diff] [blame] | 46 | #define EFI_LOADER_SIGNATURE "EL64" |
Huang, Ying | 5b83683 | 2008-01-30 13:31:19 +0100 | [diff] [blame] | 47 | |
Matt Fleming | 62fa6e6 | 2014-03-27 15:10:39 -0700 | [diff] [blame] | 48 | extern u64 asmlinkage efi_call(void *fp, ...); |
Huang, Ying | 5b83683 | 2008-01-30 13:31:19 +0100 | [diff] [blame] | 49 | |
Matt Fleming | 62fa6e6 | 2014-03-27 15:10:39 -0700 | [diff] [blame] | 50 | #define efi_call_phys(f, args...) efi_call((f), args) |
| 51 | |
| 52 | #define efi_call_virt(f, ...) \ |
Borislav Petkov | d2f7cbe | 2013-10-31 17:25:08 +0100 | [diff] [blame] | 53 | ({ \ |
| 54 | efi_status_t __s; \ |
| 55 | \ |
| 56 | efi_sync_low_kernel_mappings(); \ |
| 57 | preempt_disable(); \ |
Ricardo Neri | de05764 | 2014-03-27 15:10:42 -0700 | [diff] [blame^] | 58 | __kernel_fpu_begin(); \ |
Matt Fleming | 62fa6e6 | 2014-03-27 15:10:39 -0700 | [diff] [blame] | 59 | __s = efi_call((void *)efi.systab->runtime->f, __VA_ARGS__); \ |
Ricardo Neri | de05764 | 2014-03-27 15:10:42 -0700 | [diff] [blame^] | 60 | __kernel_fpu_end(); \ |
Borislav Petkov | d2f7cbe | 2013-10-31 17:25:08 +0100 | [diff] [blame] | 61 | preempt_enable(); \ |
| 62 | __s; \ |
| 63 | }) |
| 64 | |
Ricardo Neri | 982e239 | 2014-03-27 15:10:41 -0700 | [diff] [blame] | 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 | |
Keith Packard | e1ad783 | 2011-12-11 16:12:42 -0800 | [diff] [blame] | 71 | extern void __iomem *efi_ioremap(unsigned long addr, unsigned long size, |
Matt Fleming | 3e8fa26 | 2012-10-19 13:25:46 +0100 | [diff] [blame] | 72 | u32 type, u64 attribute); |
Keith Packard | e1ad783 | 2011-12-11 16:12:42 -0800 | [diff] [blame] | 73 | |
Huang, Ying | 5b83683 | 2008-01-30 13:31:19 +0100 | [diff] [blame] | 74 | #endif /* CONFIG_X86_32 */ |
| 75 | |
Jaswinder Singh Rajput | cbafbc8 | 2008-12-29 20:36:40 +0530 | [diff] [blame] | 76 | extern int add_efi_memmap; |
Borislav Petkov | d2f7cbe | 2013-10-31 17:25:08 +0100 | [diff] [blame] | 77 | extern struct efi_scratch efi_scratch; |
Matthew Garrett | 9cd2b07 | 2011-05-05 15:19:43 -0400 | [diff] [blame] | 78 | extern void efi_set_executable(efi_memory_desc_t *md, bool executable); |
Olof Johansson | 1adbfa3 | 2012-02-12 13:24:29 -0800 | [diff] [blame] | 79 | extern int efi_memblock_x86_reserve_range(void); |
Huang, Ying | 5b83683 | 2008-01-30 13:31:19 +0100 | [diff] [blame] | 80 | extern void efi_call_phys_prelog(void); |
| 81 | extern void efi_call_phys_epilog(void); |
Olof Johansson | 5189c2a | 2012-10-24 10:00:44 -0700 | [diff] [blame] | 82 | extern void efi_unmap_memmap(void); |
Matt Fleming | 3e8fa26 | 2012-10-19 13:25:46 +0100 | [diff] [blame] | 83 | extern void efi_memory_uc(u64 addr, unsigned long size); |
Borislav Petkov | d2f7cbe | 2013-10-31 17:25:08 +0100 | [diff] [blame] | 84 | extern void __init efi_map_region(efi_memory_desc_t *md); |
Dave Young | 3b26649 | 2013-12-20 18:02:14 +0800 | [diff] [blame] | 85 | extern void __init efi_map_region_fixed(efi_memory_desc_t *md); |
Borislav Petkov | d2f7cbe | 2013-10-31 17:25:08 +0100 | [diff] [blame] | 86 | extern void efi_sync_low_kernel_mappings(void); |
Borislav Petkov | b7b898a | 2014-01-18 12:48:17 +0100 | [diff] [blame] | 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); |
Borislav Petkov | d2f7cbe | 2013-10-31 17:25:08 +0100 | [diff] [blame] | 89 | extern void __init old_map_region(efi_memory_desc_t *md); |
Borislav Petkov | c55d016 | 2014-02-14 08:24:24 +0100 | [diff] [blame] | 90 | extern void __init runtime_code_page_mkexec(void); |
| 91 | extern void __init efi_runtime_mkexec(void); |
Borislav Petkov | 11cc851 | 2014-01-18 12:48:15 +0100 | [diff] [blame] | 92 | extern void __init efi_dump_pagetable(void); |
Borislav Petkov | a5d90c9 | 2014-03-04 17:02:17 +0100 | [diff] [blame] | 93 | extern void __init efi_apply_memmap_quirks(void); |
Huang, Ying | 5b83683 | 2008-01-30 13:31:19 +0100 | [diff] [blame] | 94 | |
Dave Young | 1fec053 | 2013-12-20 18:02:19 +0800 | [diff] [blame] | 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; |
Dave Young | 1fec053 | 2013-12-20 18:02:19 +0800 | [diff] [blame] | 104 | |
Satoru Takeuchi | 6b59e36 | 2013-02-14 09:07:35 +0900 | [diff] [blame] | 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 | |
Matt Fleming | 7d453ee | 2014-01-10 18:52:06 +0000 | [diff] [blame] | 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 | |
Matt Fleming | 72548e8 | 2013-10-04 09:36:56 +0100 | [diff] [blame] | 123 | extern struct console early_efi_console; |
Dave Young | 5c12af0 | 2014-01-03 11:56:49 +0800 | [diff] [blame] | 124 | extern void parse_efi_setup(u64 phys_addr, u32 data_len); |
Matt Fleming | 4f9dbcf | 2014-01-10 18:48:30 +0000 | [diff] [blame] | 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 */ |
Satoru Takeuchi | 6b59e36 | 2013-02-14 09:07:35 +0900 | [diff] [blame] | 146 | #else |
Russ Anderson | 7f59423 | 2008-10-03 11:59:15 -0500 | [diff] [blame] | 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) |
Dave Young | 5c12af0 | 2014-01-03 11:56:49 +0800 | [diff] [blame] | 157 | static inline void parse_efi_setup(u64 phys_addr, u32 data_len) {} |
Russ Anderson | 7f59423 | 2008-10-03 11:59:15 -0500 | [diff] [blame] | 158 | #endif /* CONFIG_EFI */ |
| 159 | |
H. Peter Anvin | 1965aae | 2008-10-22 22:26:29 -0700 | [diff] [blame] | 160 | #endif /* _ASM_X86_EFI_H */ |