arch/x86/include/asm/efi.h

   1 #ifndef _ASM_X86_EFI_H
   2 #define _ASM_X86_EFI_H
   3
   4 #ifdef CONFIG_X86_32
   5
   6 #define EFI_LOADER_SIGNATURE    "EL32"
   7
   8 extern unsigned long asmlinkage efi_call_phys(void *, ...);
   9
  10 #define efi_call_phys0(f)               efi_call_phys(f)
  11 #define efi_call_phys1(f, a1)           efi_call_phys(f, a1)
  12 #define efi_call_phys2(f, a1, a2)       efi_call_phys(f, a1, a2)
  13 #define efi_call_phys3(f, a1, a2, a3)   efi_call_phys(f, a1, a2, a3)
  14 #define efi_call_phys4(f, a1, a2, a3, a4)       \
  15         efi_call_phys(f, a1, a2, a3, a4)
  16 #define efi_call_phys5(f, a1, a2, a3, a4, a5)   \
  17         efi_call_phys(f, a1, a2, a3, a4, a5)
  18 #define efi_call_phys6(f, a1, a2, a3, a4, a5, a6)       \
  19         efi_call_phys(f, a1, a2, a3, a4, a5, a6)
  20 /*
  21  * Wrap all the virtual calls in a way that forces the parameters on the stack.
  22  */
  23
  24 #define efi_call_virt(f, args...) \
  25         ((efi_##f##_t __attribute__((regparm(0)))*)efi.systab->runtime->f)(args)
  26
  27 #define efi_call_virt0(f)               efi_call_virt(f)
  28 #define efi_call_virt1(f, a1)           efi_call_virt(f, a1)
  29 #define efi_call_virt2(f, a1, a2)       efi_call_virt(f, a1, a2)
  30 #define efi_call_virt3(f, a1, a2, a3)   efi_call_virt(f, a1, a2, a3)
  31 #define efi_call_virt4(f, a1, a2, a3, a4)       \
  32         efi_call_virt(f, a1, a2, a3, a4)
  33 #define efi_call_virt5(f, a1, a2, a3, a4, a5)   \
  34         efi_call_virt(f, a1, a2, a3, a4, a5)
  35 #define efi_call_virt6(f, a1, a2, a3, a4, a5, a6)       \
  36         efi_call_virt(f, a1, a2, a3, a4, a5, a6)
  37
  38 #define efi_ioremap(addr, size, type, attr)     ioremap_cache(addr, size)
  39
  40 #else /* !CONFIG_X86_32 */
  41
  42 #define EFI_LOADER_SIGNATURE    "EL64"
  43
  44 extern u64 efi_call0(void *fp);
  45 extern u64 efi_call1(void *fp, u64 arg1);
  46 extern u64 efi_call2(void *fp, u64 arg1, u64 arg2);
  47 extern u64 efi_call3(void *fp, u64 arg1, u64 arg2, u64 arg3);
  48 extern u64 efi_call4(void *fp, u64 arg1, u64 arg2, u64 arg3, u64 arg4);
  49 extern u64 efi_call5(void *fp, u64 arg1, u64 arg2, u64 arg3,
  50                      u64 arg4, u64 arg5);
  51 extern u64 efi_call6(void *fp, u64 arg1, u64 arg2, u64 arg3,
  52                      u64 arg4, u64 arg5, u64 arg6);
  53
  54 #define efi_call_phys0(f)                       \
  55         efi_call0((f))
  56 #define efi_call_phys1(f, a1)                   \
  57         efi_call1((f), (u64)(a1))
  58 #define efi_call_phys2(f, a1, a2)                       \
  59         efi_call2((f), (u64)(a1), (u64)(a2))
  60 #define efi_call_phys3(f, a1, a2, a3)                           \
  61         efi_call3((f), (u64)(a1), (u64)(a2), (u64)(a3))
  62 #define efi_call_phys4(f, a1, a2, a3, a4)                               \
  63         efi_call4((f), (u64)(a1), (u64)(a2), (u64)(a3),         \
  64                   (u64)(a4))
  65 #define efi_call_phys5(f, a1, a2, a3, a4, a5)                           \
  66         efi_call5((f), (u64)(a1), (u64)(a2), (u64)(a3),         \
  67                   (u64)(a4), (u64)(a5))
  68 #define efi_call_phys6(f, a1, a2, a3, a4, a5, a6)                       \
  69         efi_call6((f), (u64)(a1), (u64)(a2), (u64)(a3),         \
  70                   (u64)(a4), (u64)(a5), (u64)(a6))
  71
  72 #define efi_call_virt0(f)                               \
  73         efi_call0((efi.systab->runtime->f))
  74 #define efi_call_virt1(f, a1)                                   \
  75         efi_call1((efi.systab->runtime->f), (u64)(a1))
  76 #define efi_call_virt2(f, a1, a2)                                       \
  77         efi_call2((efi.systab->runtime->f), (u64)(a1), (u64)(a2))
  78 #define efi_call_virt3(f, a1, a2, a3)                                   \
  79         efi_call3((efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
  80                   (u64)(a3))
  81 #define efi_call_virt4(f, a1, a2, a3, a4)                               \
  82         efi_call4((efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
  83                   (u64)(a3), (u64)(a4))
  84 #define efi_call_virt5(f, a1, a2, a3, a4, a5)                           \
  85         efi_call5((efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
  86                   (u64)(a3), (u64)(a4), (u64)(a5))
  87 #define efi_call_virt6(f, a1, a2, a3, a4, a5, a6)                       \
  88         efi_call6((efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
  89                   (u64)(a3), (u64)(a4), (u64)(a5), (u64)(a6))
  90
  91 extern void __iomem *efi_ioremap(unsigned long addr, unsigned long size,
  92                                  u32 type, u64 attribute);
  93
  94 #endif /* CONFIG_X86_32 */
  95
  96 extern int add_efi_memmap;
  97 extern unsigned long x86_efi_facility;
  98 extern void efi_set_executable(efi_memory_desc_t *md, bool executable);
  99 extern int efi_memblock_x86_reserve_range(void);
 100 extern void efi_call_phys_prelog(void);
 101 extern void efi_call_phys_epilog(void);
 102 extern void efi_unmap_memmap(void);
 103 extern void efi_memory_uc(u64 addr, unsigned long size);
 104
 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
 112 #else
 113 /*
 114  * IF EFI is not configured, have the EFI calls return -ENOSYS.
 115  */
 116 #define efi_call0(_f)                                   (-ENOSYS)
 117 #define efi_call1(_f, _a1)                              (-ENOSYS)
 118 #define efi_call2(_f, _a1, _a2)                         (-ENOSYS)
 119 #define efi_call3(_f, _a1, _a2, _a3)                    (-ENOSYS)
 120 #define efi_call4(_f, _a1, _a2, _a3, _a4)               (-ENOSYS)
 121 #define efi_call5(_f, _a1, _a2, _a3, _a4, _a5)          (-ENOSYS)
 122 #define efi_call6(_f, _a1, _a2, _a3, _a4, _a5, _a6)     (-ENOSYS)
 123 #endif /* CONFIG_EFI */
 124
 125 #endif /* _ASM_X86_EFI_H */