1 /** @file 2 Macros to work around lack of Clang support for LDR register, =expr 3 4 Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR> 5 Portions copyright (c) 2011 - 2014, ARM Ltd. All rights reserved.<BR> 6 7 This program and the accompanying materials 8 are licensed and made available under the terms and conditions of the BSD License 9 which accompanies this distribution. The full text of the license may be found at 10 http://opensource.org/licenses/bsd-license.php 11 12 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 13 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 14 15 **/ 16 17 18 #ifndef __MACRO_IO_LIBV8_H__ 19 #define __MACRO_IO_LIBV8_H__ 20 21 #define SetPrimaryStack(StackTop, GlobalSize, Tmp, Tmp1) \ 22 ands Tmp, GlobalSize, #15 ; \ 23 mov Tmp1, #16 ; \ 24 sub Tmp1, Tmp1, Tmp ; \ 25 csel Tmp, Tmp1, Tmp, ne ; \ 26 add GlobalSize, GlobalSize, Tmp ; \ 27 sub sp, StackTop, GlobalSize ; \ 28 ; \ 29 mov Tmp, sp ; \ 30 mov GlobalSize, #0x0 ; \ 31 _SetPrimaryStackInitGlobals: ; \ 32 cmp Tmp, StackTop ; \ 33 b.eq _SetPrimaryStackEnd ; \ 34 str GlobalSize, [Tmp], #8 ; \ 35 b _SetPrimaryStackInitGlobals ; \ 36 _SetPrimaryStackEnd: 37 38 // Initialize the Global Variable with '0' 39 #define InitializePrimaryStack(GlobalSize, Tmp1, Tmp2) \ 40 and Tmp1, GlobalSize, #15 ; \ 41 mov Tmp2, #16 ; \ 42 sub Tmp2, Tmp2, Tmp1 ; \ 43 add GlobalSize, GlobalSize, Tmp2 ; \ 44 ; \ 45 mov Tmp1, sp ; \ 46 sub sp, sp, GlobalSize ; \ 47 mov GlobalSize, #0x0 ; \ 48 _InitializePrimaryStackLoop: ; \ 49 mov Tmp2, sp ; \ 50 cmp Tmp1, Tmp2 ; \ 51 bls _InitializePrimaryStackEnd ; \ 52 str GlobalSize, [Tmp1, #-8]! ; \ 53 b _InitializePrimaryStackLoop ; \ 54 _InitializePrimaryStackEnd: 55 56 // CurrentEL : 0xC = EL3; 8 = EL2; 4 = EL1 57 // This only selects between EL1 and EL2, else we die. 58 // Provide the Macro with a safe temp xreg to use. 59 #define EL1_OR_EL2(SAFE_XREG) \ 60 mrs SAFE_XREG, CurrentEL ;\ 61 cmp SAFE_XREG, #0x8 ;\ 62 b.eq 2f ;\ 63 cmp SAFE_XREG, #0x4 ;\ 64 b.ne . ;// We should never get here 65 // EL1 code starts here 66 67 // CurrentEL : 0xC = EL3; 8 = EL2; 4 = EL1 68 // This only selects between EL1 and EL2 and EL3, else we die. 69 // Provide the Macro with a safe temp xreg to use. 70 #define EL1_OR_EL2_OR_EL3(SAFE_XREG) \ 71 mrs SAFE_XREG, CurrentEL ;\ 72 cmp SAFE_XREG, #0xC ;\ 73 b.eq 3f ;\ 74 cmp SAFE_XREG, #0x8 ;\ 75 b.eq 2f ;\ 76 cmp SAFE_XREG, #0x4 ;\ 77 b.ne . ;// We should never get here 78 // EL1 code starts here 79 #if defined(__clang__) 80 81 // load x0 with _Data 82 #define LoadConstant(_Data) \ 83 ldr x0, 1f ; \ 84 b 2f ; \ 85 .align(8) ; \ 86 1: \ 87 .8byte (_Data) ; \ 88 2: 89 90 // load _Reg with _Data 91 #define LoadConstantToReg(_Data, _Reg) \ 92 ldr _Reg, 1f ; \ 93 b 2f ; \ 94 .align(8) ; \ 95 1: \ 96 .8byte (_Data) ; \ 97 2: 98 99 #elif defined (__GNUC__) 100 101 #define LoadConstant(Data) \ 102 ldr x0, =Data 103 104 #define LoadConstantToReg(Data, Reg) \ 105 ldr Reg, =Data 106 107 #endif // __GNUC__ 108 109 #endif // __MACRO_IO_LIBV8_H__ 110 111