projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 25402f5d | 1 | /** @file\r |
| 5f1103bd | 2 | Macros to work around lack of Clang support for LDR register, =expr\r |
| 25402f5d HL |
3 | \r |
| 4 | Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r | |
| 0a6f2862 | 5 | Portions copyright (c) 2011 - 2014, ARM Ltd. All rights reserved.<BR>\r |
| 25402f5d HL |
6 | \r |
| 7 | This program and the accompanying materials\r | |
| 8 | are licensed and made available under the terms and conditions of the BSD License\r | |
| 9 | which accompanies this distribution. The full text of the license may be found at\r | |
| 10 | http://opensource.org/licenses/bsd-license.php\r | |
| 11 | \r | |
| 12 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
| 13 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
| 14 | \r | |
| 15 | **/\r | |
| 16 | \r | |
| 17 | \r | |
| 18 | #ifndef __MACRO_IO_LIBV8_H__\r | |
| 19 | #define __MACRO_IO_LIBV8_H__\r | |
| 20 | \r | |
| 25402f5d HL |
21 | // CurrentEL : 0xC = EL3; 8 = EL2; 4 = EL1\r |
| 22 | // This only selects between EL1 and EL2, else we die.\r | |
| 23 | // Provide the Macro with a safe temp xreg to use.\r | |
| 24 | #define EL1_OR_EL2(SAFE_XREG) \\r | |
| 25 | mrs SAFE_XREG, CurrentEL ;\\r | |
| eaa84fd5 | 26 | cmp SAFE_XREG, #0x8 ;\\r |
| a34608ca | 27 | b.gt . ;\\r |
| eaa84fd5 | 28 | b.eq 2f ;\\r |
| a34608ca AB |
29 | cbnz SAFE_XREG, 1f ;\\r |
| 30 | b . ;// We should never get here\r | |
| 31 | \r | |
| 25402f5d HL |
32 | \r |
| 33 | // CurrentEL : 0xC = EL3; 8 = EL2; 4 = EL1\r | |
| 34 | // This only selects between EL1 and EL2 and EL3, else we die.\r | |
| 35 | // Provide the Macro with a safe temp xreg to use.\r | |
| eaa84fd5 | 36 | #define EL1_OR_EL2_OR_EL3(SAFE_XREG) \\r |
| 25402f5d | 37 | mrs SAFE_XREG, CurrentEL ;\\r |
| eaa84fd5 | 38 | cmp SAFE_XREG, #0x8 ;\\r |
| a34608ca | 39 | b.gt 3f ;\\r |
| eaa84fd5 | 40 | b.eq 2f ;\\r |
| a34608ca AB |
41 | cbnz SAFE_XREG, 1f ;\\r |
| 42 | b . ;// We should never get here\r | |
| 43 | \r | |
| 5f1103bd OM |
44 | #if defined(__clang__)\r |
| 45 | \r | |
| 46 | // load x0 with _Data\r | |
| 47 | #define LoadConstant(_Data) \\r | |
| 48 | ldr x0, 1f ; \\r | |
| 49 | b 2f ; \\r | |
| 50 | .align(8) ; \\r | |
| 51 | 1: \\r | |
| 52 | .8byte (_Data) ; \\r | |
| 53 | 2:\r | |
| 54 | \r | |
| 55 | // load _Reg with _Data\r | |
| 56 | #define LoadConstantToReg(_Data, _Reg) \\r | |
| 57 | ldr _Reg, 1f ; \\r | |
| 58 | b 2f ; \\r | |
| 59 | .align(8) ; \\r | |
| 60 | 1: \\r | |
| 61 | .8byte (_Data) ; \\r | |
| 62 | 2:\r | |
| 63 | \r | |
| 64 | #elif defined (__GNUC__)\r | |
| 25402f5d | 65 | \r |
| 5f1103bd OM |
66 | #define LoadConstant(Data) \\r |
| 67 | ldr x0, =Data\r | |
| 25402f5d | 68 | \r |
| 5f1103bd OM |
69 | #define LoadConstantToReg(Data, Reg) \\r |
| 70 | ldr Reg, =Data\r | |
| 25402f5d | 71 | \r |
| 5f1103bd | 72 | #endif // __GNUC__\r |
| 25402f5d HL |
73 | \r |
| 74 | #endif // __MACRO_IO_LIBV8_H__\r | |
| 75 | \r |