1 files changed, 110 insertions, 0 deletions

diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h
new file mode 100644
index 00000000000..313438e6334
--- /dev/null
+++ b/arch/x86/include/asm/efi.h
@@ -0,0 +1,110 @@
+#ifndef ASM_X86__EFI_H
+#define ASM_X86__EFI_H
+
+#ifdef CONFIG_X86_32
+
+extern unsigned long asmlinkage efi_call_phys(void *, ...);
+
+#define efi_call_phys0(f)               efi_call_phys(f)
+#define efi_call_phys1(f, a1)           efi_call_phys(f, a1)
+#define efi_call_phys2(f, a1, a2)       efi_call_phys(f, a1, a2)
+#define efi_call_phys3(f, a1, a2, a3)   efi_call_phys(f, a1, a2, a3)
+#define efi_call_phys4(f, a1, a2, a3, a4)       \
+        efi_call_phys(f, a1, a2, a3, a4)
+#define efi_call_phys5(f, a1, a2, a3, a4, a5)   \
+        efi_call_phys(f, a1, a2, a3, a4, a5)
+#define efi_call_phys6(f, a1, a2, a3, a4, a5, a6)       \
+        efi_call_phys(f, a1, a2, a3, a4, a5, a6)
+/*
+ * Wrap all the virtual calls in a way that forces the parameters on the stack.
+ */
+
+#define efi_call_virt(f, args...) \
+        ((efi_##f##_t __attribute__((regparm(0)))*)efi.systab->runtime->f)(args)
+
+#define efi_call_virt0(f)               efi_call_virt(f)
+#define efi_call_virt1(f, a1)           efi_call_virt(f, a1)
+#define efi_call_virt2(f, a1, a2)       efi_call_virt(f, a1, a2)
+#define efi_call_virt3(f, a1, a2, a3)   efi_call_virt(f, a1, a2, a3)
+#define efi_call_virt4(f, a1, a2, a3, a4)       \
+        efi_call_virt(f, a1, a2, a3, a4)
+#define efi_call_virt5(f, a1, a2, a3, a4, a5)   \
+        efi_call_virt(f, a1, a2, a3, a4, a5)
+#define efi_call_virt6(f, a1, a2, a3, a4, a5, a6)       \
+        efi_call_virt(f, a1, a2, a3, a4, a5, a6)
+
+#define efi_ioremap(addr, size)                 ioremap_cache(addr, size)
+
+#else /* !CONFIG_X86_32 */
+
+#define MAX_EFI_IO_PAGES        100
+
+extern u64 efi_call0(void *fp);
+extern u64 efi_call1(void *fp, u64 arg1);
+extern u64 efi_call2(void *fp, u64 arg1, u64 arg2);
+extern u64 efi_call3(void *fp, u64 arg1, u64 arg2, u64 arg3);
+extern u64 efi_call4(void *fp, u64 arg1, u64 arg2, u64 arg3, u64 arg4);
+extern u64 efi_call5(void *fp, u64 arg1, u64 arg2, u64 arg3,
+                     u64 arg4, u64 arg5);
+extern u64 efi_call6(void *fp, u64 arg1, u64 arg2, u64 arg3,
+                     u64 arg4, u64 arg5, u64 arg6);
+
+#define efi_call_phys0(f)                       \
+        efi_call0((void *)(f))
+#define efi_call_phys1(f, a1)                   \
+        efi_call1((void *)(f), (u64)(a1))
+#define efi_call_phys2(f, a1, a2)                       \
+        efi_call2((void *)(f), (u64)(a1), (u64)(a2))
+#define efi_call_phys3(f, a1, a2, a3)                           \
+        efi_call3((void *)(f), (u64)(a1), (u64)(a2), (u64)(a3))
+#define efi_call_phys4(f, a1, a2, a3, a4)                               \
+        efi_call4((void *)(f), (u64)(a1), (u64)(a2), (u64)(a3),         \
+                  (u64)(a4))
+#define efi_call_phys5(f, a1, a2, a3, a4, a5)                           \
+        efi_call5((void *)(f), (u64)(a1), (u64)(a2), (u64)(a3),         \
+                  (u64)(a4), (u64)(a5))
+#define efi_call_phys6(f, a1, a2, a3, a4, a5, a6)                       \
+        efi_call6((void *)(f), (u64)(a1), (u64)(a2), (u64)(a3),         \
+                  (u64)(a4), (u64)(a5), (u64)(a6))
+
+#define efi_call_virt0(f)                               \
+        efi_call0((void *)(efi.systab->runtime->f))
+#define efi_call_virt1(f, a1)                                   \
+        efi_call1((void *)(efi.systab->runtime->f), (u64)(a1))
+#define efi_call_virt2(f, a1, a2)                                       \
+        efi_call2((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2))
+#define efi_call_virt3(f, a1, a2, a3)                                   \
+        efi_call3((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
+                  (u64)(a3))
+#define efi_call_virt4(f, a1, a2, a3, a4)                               \
+        efi_call4((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
+                  (u64)(a3), (u64)(a4))
+#define efi_call_virt5(f, a1, a2, a3, a4, a5)                           \
+        efi_call5((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
+                  (u64)(a3), (u64)(a4), (u64)(a5))
+#define efi_call_virt6(f, a1, a2, a3, a4, a5, a6)                       \
+        efi_call6((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
+                  (u64)(a3), (u64)(a4), (u64)(a5), (u64)(a6))
+
+extern void __iomem *efi_ioremap(unsigned long addr, unsigned long size);
+
+#endif /* CONFIG_X86_32 */
+
+extern void efi_reserve_early(void);
+extern void efi_call_phys_prelog(void);
+extern void efi_call_phys_epilog(void);
+
+#ifndef CONFIG_EFI
+/*
+ * IF EFI is not configured, have the EFI calls return -ENOSYS.
+ */
+#define efi_call0(_f)                                   (-ENOSYS)
+#define efi_call1(_f, _a1)                              (-ENOSYS)
+#define efi_call2(_f, _a1, _a2)                         (-ENOSYS)
+#define efi_call3(_f, _a1, _a2, _a3)                    (-ENOSYS)
+#define efi_call4(_f, _a1, _a2, _a3, _a4)               (-ENOSYS)
+#define efi_call5(_f, _a1, _a2, _a3, _a4, _a5)          (-ENOSYS)
+#define efi_call6(_f, _a1, _a2, _a3, _a4, _a5, _a6)     (-ENOSYS)
+#endif /* CONFIG_EFI */
+
+#endif /* ASM_X86__EFI_H */