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/** @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>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#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
#if defined(__clang__)
// load x0 with _Data
#define LoadConstant(_Data) \
ldr x0, 1f ; \
b 2f ; \
.align(8) ; \
1: \
.8byte (_Data) ; \
2:
// load _Reg with _Data
#define LoadConstantToReg(_Data, _Reg) \
ldr _Reg, 1f ; \
b 2f ; \
.align(8) ; \
1: \
.8byte (_Data) ; \
2:
#elif defined (__GNUC__)
#define LoadConstant(Data) \
ldr x0, =Data
#define LoadConstantToReg(Data, Reg) \
ldr Reg, =Data
#endif // __GNUC__
#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__
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