1 files changed, 57 insertions, 0 deletions
diff --git a/roms/edk2/ArmPkg/Include/AsmMacroIoLibV8.h b/roms/edk2/ArmPkg/Include/AsmMacroIoLibV8.h
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index 000000000..bcc0d8daf
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+++ b/roms/edk2/ArmPkg/Include/AsmMacroIoLibV8.h
@@ -0,0 +1,57 @@
+/** @file
+  Macros to work around lack of Clang support for LDR register, =expr
+
+  Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
+  Portions copyright (c) 2011 - 2014, ARM Ltd. All rights reserved.<BR>
+  Copyright (c) 2016, Linaro Ltd. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+
+#ifndef __MACRO_IO_LIBV8_H__
+#define __MACRO_IO_LIBV8_H__
+
+// CurrentEL : 0xC = EL3; 8 = EL2; 4 = EL1
+// This only selects between EL1 and EL2, else we die.
+// Provide the Macro with a safe temp xreg to use.
+#define EL1_OR_EL2(SAFE_XREG)        \
+        mrs    SAFE_XREG, CurrentEL ;\
+        cmp    SAFE_XREG, #0x8      ;\
+        b.gt   .                    ;\
+        b.eq   2f                   ;\
+        cbnz   SAFE_XREG, 1f        ;\
+        b      .                    ;// We should never get here
+
+
+// CurrentEL : 0xC = EL3; 8 = EL2; 4 = EL1
+// This only selects between EL1 and EL2 and EL3, else we die.
+// Provide the Macro with a safe temp xreg to use.
+#define EL1_OR_EL2_OR_EL3(SAFE_XREG) \
+        mrs    SAFE_XREG, CurrentEL ;\
+        cmp    SAFE_XREG, #0x8      ;\
+        b.gt   3f                   ;\
+        b.eq   2f                   ;\
+        cbnz   SAFE_XREG, 1f        ;\
+        b      .                    ;// We should never get here
+
+#define _ASM_FUNC(Name, Section)    \
+  .global   Name                  ; \
+  .section  #Section, "ax"        ; \
+  .type     Name, %function       ; \
+  Name:
+
+#define ASM_FUNC(Name)            _ASM_FUNC(ASM_PFX(Name), .text. ## Name)
+
+#define MOV32(Reg, Val)                   \
+  movz      Reg, (Val) >> 16, lsl #16   ; \
+  movk      Reg, (Val) & 0xffff
+
+#define MOV64(Reg, Val)                             \
+  movz      Reg, (Val) >> 48, lsl #48             ; \
+  movk      Reg, ((Val) >> 32) & 0xffff, lsl #32  ; \
+  movk      Reg, ((Val) >> 16) & 0xffff, lsl #16  ; \
+  movk      Reg, (Val) & 0xffff
+
+#endif // __MACRO_IO_LIBV8_H__