| /** @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 | |
| // 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 // ASM_MACRO_IO_LIBV8_H_ |