| Vishal Bhoj | 82c8071 | 2015-12-15 21:13:33 +0530 | [diff] [blame^] | 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 |
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| 7 | This program and the accompanying materials
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| 8 | are licensed and made available under the terms and conditions of the BSD License
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| 9 | which accompanies this distribution. The full text of the license may be found at
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| 10 | http://opensource.org/licenses/bsd-license.php
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| 11 |
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| 12 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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| 13 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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| 14 |
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| 15 | **/
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| 16 |
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| 17 |
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| 18 | #ifndef __MACRO_IO_LIBV8_H__
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| 19 | #define __MACRO_IO_LIBV8_H__
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| 20 |
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| 21 | #define SetPrimaryStack(StackTop, GlobalSize, Tmp, Tmp1) \
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| 22 | ands Tmp, GlobalSize, #15 ; \
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| 23 | mov Tmp1, #16 ; \
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| 24 | sub Tmp1, Tmp1, Tmp ; \
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| 25 | csel Tmp, Tmp1, Tmp, ne ; \
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| 26 | add GlobalSize, GlobalSize, Tmp ; \
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| 27 | sub sp, StackTop, GlobalSize ; \
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| 28 | ; \
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| 29 | mov Tmp, sp ; \
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| 30 | mov GlobalSize, #0x0 ; \
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| 31 | _SetPrimaryStackInitGlobals: ; \
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| 32 | cmp Tmp, StackTop ; \
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| 33 | b.eq _SetPrimaryStackEnd ; \
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| 34 | str GlobalSize, [Tmp], #8 ; \
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| 35 | b _SetPrimaryStackInitGlobals ; \
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| 36 | _SetPrimaryStackEnd:
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| 37 |
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| 38 | // Initialize the Global Variable with '0'
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| 39 | #define InitializePrimaryStack(GlobalSize, Tmp1, Tmp2) \
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| 40 | and Tmp1, GlobalSize, #15 ; \
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| 41 | mov Tmp2, #16 ; \
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| 42 | sub Tmp2, Tmp2, Tmp1 ; \
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| 43 | add GlobalSize, GlobalSize, Tmp2 ; \
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| 44 | ; \
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| 45 | mov Tmp1, sp ; \
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| 46 | sub sp, sp, GlobalSize ; \
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| 47 | mov GlobalSize, #0x0 ; \
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| 48 | _InitializePrimaryStackLoop: ; \
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| 49 | mov Tmp2, sp ; \
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| 50 | cmp Tmp1, Tmp2 ; \
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| 51 | bls _InitializePrimaryStackEnd ; \
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| 52 | str GlobalSize, [Tmp1, #-8]! ; \
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| 53 | b _InitializePrimaryStackLoop ; \
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| 54 | _InitializePrimaryStackEnd:
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| 55 |
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| 56 | // CurrentEL : 0xC = EL3; 8 = EL2; 4 = EL1
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| 57 | // This only selects between EL1 and EL2, else we die.
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| 58 | // Provide the Macro with a safe temp xreg to use.
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| 59 | #define EL1_OR_EL2(SAFE_XREG) \
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| 60 | mrs SAFE_XREG, CurrentEL ;\
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| 61 | cmp SAFE_XREG, #0x8 ;\
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| 62 | b.eq 2f ;\
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| 63 | cmp SAFE_XREG, #0x4 ;\
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| 64 | b.ne . ;// We should never get here
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| 65 | // EL1 code starts here
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| 66 |
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| 67 | // CurrentEL : 0xC = EL3; 8 = EL2; 4 = EL1
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| 68 | // This only selects between EL1 and EL2 and EL3, else we die.
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| 69 | // Provide the Macro with a safe temp xreg to use.
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| 70 | #define EL1_OR_EL2_OR_EL3(SAFE_XREG) \
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| 71 | mrs SAFE_XREG, CurrentEL ;\
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| 72 | cmp SAFE_XREG, #0xC ;\
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| 73 | b.eq 3f ;\
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| 74 | cmp SAFE_XREG, #0x8 ;\
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| 75 | b.eq 2f ;\
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| 76 | cmp SAFE_XREG, #0x4 ;\
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| 77 | b.ne . ;// We should never get here
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| 78 | // EL1 code starts here
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| 79 | #if defined(__clang__)
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| 80 |
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| 81 | // load x0 with _Data
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| 82 | #define LoadConstant(_Data) \
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| 83 | ldr x0, 1f ; \
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| 84 | b 2f ; \
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| 85 | .align(8) ; \
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| 86 | 1: \
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| 87 | .8byte (_Data) ; \
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| 88 | 2:
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| 89 |
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| 90 | // load _Reg with _Data
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| 91 | #define LoadConstantToReg(_Data, _Reg) \
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| 92 | ldr _Reg, 1f ; \
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| 93 | b 2f ; \
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| 94 | .align(8) ; \
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| 95 | 1: \
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| 96 | .8byte (_Data) ; \
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| 97 | 2:
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| 98 |
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| 99 | #elif defined (__GNUC__)
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| 100 |
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| 101 | #define LoadConstant(Data) \
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| 102 | ldr x0, =Data
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| 103 |
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| 104 | #define LoadConstantToReg(Data, Reg) \
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| 105 | ldr Reg, =Data
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| 106 |
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| 107 | #endif // __GNUC__
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| 108 |
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| 109 | #endif // __MACRO_IO_LIBV8_H__
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| 110 |
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