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((void *)(f))
  56 #define efi_call_phys1(f, a1)                   \
  57         efi_call1((void *)(f), (u64)(a1))
  58 #define efi_call_phys2(f, a1, a2)                       \
  59         efi_call2((void *)(f), (u64)(a1), (u64)(a2))
  60 #define efi_call_phys3(f, a1, a2, a3)                           \
  61         efi_call3((void *)(f), (u64)(a1), (u64)(a2), (u64)(a3))
  62 #define efi_call_phys4(f, a1, a2, a3, a4)                               \
  63         efi_call4((void *)(f), (u64)(a1), (u64)(a2), (u64)(a3),         \
  64                   (u64)(a4))
  65 #define efi_call_phys5(f, a1, a2, a3, a4, a5)                           \
  66         efi_call5((void *)(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((void *)(f), (u64)(a1), (u64)(a2), (u64)(a3),         \
  70                   (u64)(a4), (u64)(a5), (u64)(a6))
  71
  72 extern unsigned long efi_call_virt_prelog(void);
  73 extern void efi_call_virt_epilog(unsigned long);
  74
  75 #define efi_callx(x, func, ...)                                 \
  76         ({                                                      \
  77                 efi_status_t __status;                          \
  78                 unsigned long __pgd;                            \
  79                                                                 \
  80                 __pgd = efi_call_virt_prelog();                 \
  81                 __status = efi_call##x(func, __VA_ARGS__);      \
  82                 efi_call_virt_epilog(__pgd);                    \
  83                 __status;                                       \
  84         })
  85
  86 #define efi_call_virt0(f)                               \
  87         efi_callx(0, (void *)(efi.systab->runtime->f))
  88 #define efi_call_virt1(f, a1)                                   \
  89         efi_callx(1, (void *)(efi.systab->runtime->f), (u64)(a1))
  90 #define efi_call_virt2(f, a1, a2)                                       \
  91         efi_callx(2, (void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2))
  92 #define efi_call_virt3(f, a1, a2, a3)                                   \
  93         efi_callx(3, (void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
  94                   (u64)(a3))
  95 #define efi_call_virt4(f, a1, a2, a3, a4)                               \
  96         efi_callx(4, (void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
  97                   (u64)(a3), (u64)(a4))
  98 #define efi_call_virt5(f, a1, a2, a3, a4, a5)                           \
  99         efi_callx(5, (void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
 100                   (u64)(a3), (u64)(a4), (u64)(a5))
 101 #define efi_call_virt6(f, a1, a2, a3, a4, a5, a6)                       \
 102         efi_callx(6, (void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
 103                   (u64)(a3), (u64)(a4), (u64)(a5), (u64)(a6))
 104
 105 extern void __iomem *efi_ioremap(unsigned long addr, unsigned long size,
 106                                  u32 type, u64 attribute);
 107
 108 #endif /* CONFIG_X86_32 */
 109
 110 extern int add_efi_memmap;
 111 extern void efi_set_executable(efi_memory_desc_t *md, bool executable);
 112 extern int efi_memblock_x86_reserve_range(void);
 113 extern void efi_call_phys_prelog(void);
 114 extern void efi_call_phys_epilog(void);
 115 extern void efi_unmap_memmap(void);
 116 extern void efi_memory_uc(u64 addr, unsigned long size);
 117
 118 #ifndef CONFIG_EFI
 119 /*
 120  * IF EFI is not configured, have the EFI calls return -ENOSYS.
 121  */
 122 #define efi_call0(_f)                                   (-ENOSYS)
 123 #define efi_call1(_f, _a1)                              (-ENOSYS)
 124 #define efi_call2(_f, _a1, _a2)                         (-ENOSYS)
 125 #define efi_call3(_f, _a1, _a2, _a3)                    (-ENOSYS)
 126 #define efi_call4(_f, _a1, _a2, _a3, _a4)               (-ENOSYS)
 127 #define efi_call5(_f, _a1, _a2, _a3, _a4, _a5)          (-ENOSYS)
 128 #define efi_call6(_f, _a1, _a2, _a3, _a4, _a5, _a6)     (-ENOSYS)
 129 #endif /* CONFIG_EFI */
 130
 131 #endif /* _ASM_X86_EFI_H */