| 1 | /** @file
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| 2 | Macros to work around lack of Clang support for LDR register, =expr
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| 3 |
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| 4 | Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
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| 5 | Portions copyright (c) 2011 - 2014, ARM Ltd. All rights reserved.<BR>
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| 6 | Copyright (c) 2016, Linaro Ltd. All rights reserved.<BR>
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| 7 |
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| 8 | SPDX-License-Identifier: BSD-2-Clause-Patent
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| 9 |
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| 10 | **/
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| 11 |
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| 12 | #ifndef ASM_MACRO_IO_LIBV8_H_
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| 13 | #define ASM_MACRO_IO_LIBV8_H_
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| 14 |
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| 15 | // CurrentEL : 0xC = EL3; 8 = EL2; 4 = EL1
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| 16 | // This only selects between EL1 and EL2, else we die.
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| 17 | // Provide the Macro with a safe temp xreg to use.
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| 18 | #define EL1_OR_EL2(SAFE_XREG) \
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| 19 | mrs SAFE_XREG, CurrentEL ;\
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| 20 | cmp SAFE_XREG, #0x8 ;\
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| 21 | b.gt . ;\
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| 22 | b.eq 2f ;\
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| 23 | cbnz SAFE_XREG, 1f ;\
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| 24 | b . ;// We should never get here
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| 25 |
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| 26 | // CurrentEL : 0xC = EL3; 8 = EL2; 4 = EL1
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| 27 | // This only selects between EL1 and EL2 and EL3, else we die.
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| 28 | // Provide the Macro with a safe temp xreg to use.
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| 29 | #define EL1_OR_EL2_OR_EL3(SAFE_XREG) \
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| 30 | mrs SAFE_XREG, CurrentEL ;\
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| 31 | cmp SAFE_XREG, #0x8 ;\
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| 32 | b.gt 3f ;\
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| 33 | b.eq 2f ;\
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| 34 | cbnz SAFE_XREG, 1f ;\
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| 35 | b . ;// We should never get here
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| 36 |
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| 37 | #define _ASM_FUNC(Name, Section) \
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| 38 | .global Name ; \
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| 39 | .section #Section, "ax" ; \
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| 40 | .type Name, %function ; \
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| 41 | Name: ; \
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| 42 | AARCH64_BTI(c)
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| 43 |
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| 44 | #define _ASM_FUNC_ALIGN(Name, Section, Align) \
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| 45 | .global Name ; \
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| 46 | .section #Section, "ax" ; \
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| 47 | .type Name, %function ; \
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| 48 | .balign Align ; \
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| 49 | Name: ; \
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| 50 | AARCH64_BTI(c)
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| 51 |
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| 52 | #define ASM_FUNC(Name) _ASM_FUNC(ASM_PFX(Name), .text. ## Name)
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| 53 |
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| 54 | #define ASM_FUNC_ALIGN(Name, Align) \
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| 55 | _ASM_FUNC_ALIGN(ASM_PFX(Name), .text. ## Name, Align)
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| 56 |
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| 57 | #define MOV32(Reg, Val) \
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| 58 | movz Reg, (Val) >> 16, lsl #16 ; \
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| 59 | movk Reg, (Val) & 0xffff
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| 60 |
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| 61 | #define MOV64(Reg, Val) \
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| 62 | movz Reg, (Val) >> 48, lsl #48 ; \
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| 63 | movk Reg, ((Val) >> 32) & 0xffff, lsl #32 ; \
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| 64 | movk Reg, ((Val) >> 16) & 0xffff, lsl #16 ; \
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| 65 | movk Reg, (Val) & 0xffff
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| 66 |
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| 67 | #endif // ASM_MACRO_IO_LIBV8_H_
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