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Diffstat (limited to 'MdePkg/Include/AArch64/AsmMacroLib.h')
| -rw-r--r-- | MdePkg/Include/AArch64/AsmMacroLib.h | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/MdePkg/Include/AArch64/AsmMacroLib.h b/MdePkg/Include/AArch64/AsmMacroLib.h new file mode 100644 index 0000000000..a5c8635840 --- /dev/null +++ b/MdePkg/Include/AArch64/AsmMacroLib.h @@ -0,0 +1,56 @@ +/** @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 ASM_MACRO_IO_LIBV8_H_
+#define ASM_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
+
+#define _ASM_FUNC(Name, Section) \
+ .global Name ; \
+ .section #Section, "ax" ; \
+ .type Name, %function ; \
+ Name: ; \
+ AARCH64_BTI(c)
+
+#define _ASM_FUNC_ALIGN(Name, Section, Align) \
+ .global Name ; \
+ .section #Section, "ax" ; \
+ .type Name, %function ; \
+ .balign Align ; \
+ Name: ; \
+ AARCH64_BTI(c)
+
+#define ASM_FUNC(Name) _ASM_FUNC(ASM_PFX(Name), .text. ## Name)
+
+#define ASM_FUNC_ALIGN(Name, Align) \
+ _ASM_FUNC_ALIGN(ASM_PFX(Name), .text. ## Name, Align)
+
+#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 // ASM_MACRO_IO_LIBV8_H_
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