projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 1bc83266 HL |
1 | #========================================================================================\r |
| 2 | # Copyright (c) 2011-2013, ARM Limited. All rights reserved.\r | |
| 3 | #\r | |
| 4 | # This program and the accompanying materials\r | |
| 5 | # are licensed and made available under the terms and conditions of the BSD License\r | |
| 6 | # which accompanies this distribution. The full text of the license may be found at\r | |
| 7 | # http:#opensource.org/licenses/bsd-license.php\r | |
| 8 | #\r | |
| 9 | # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
| 10 | # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
| 11 | #\r | |
| 12 | #=======================================================================================\r | |
| 13 | \r | |
| 14 | #include <AsmMacroIoLibV8.h>\r | |
| 15 | #include <Chipset/AArch64.h>\r | |
| 16 | \r | |
| 17 | #start of the code section\r | |
| 18 | .text\r | |
| 19 | .align 3\r | |
| 20 | \r | |
| 919a3a02 BJ |
21 | GCC_ASM_EXPORT(SetupExceptionLevel1)\r |
| 22 | GCC_ASM_EXPORT(SetupExceptionLevel2)\r | |
| 1bc83266 HL |
23 | \r |
| 24 | // Setup EL1 while in EL1\r | |
| 25 | ASM_PFX(SetupExceptionLevel1):\r | |
| 26 | mov x5, x30 // Save LR\r | |
| 27 | \r | |
| 28 | mov x0, #CPACR_CP_FULL_ACCESS\r | |
| 29 | bl ASM_PFX(ArmWriteCpacr) // Disable copro traps to EL1\r | |
| 30 | \r | |
| 31 | ret x5\r | |
| 32 | \r | |
| 33 | // Setup EL2 while in EL2\r | |
| 34 | ASM_PFX(SetupExceptionLevel2):\r | |
| 35 | msr sctlr_el2, xzr\r | |
| 36 | mrs x0, hcr_el2 // Read EL2 Hypervisor configuration Register\r | |
| 37 | \r | |
| 38 | // Send all interrupts to their respective Exception levels for EL2\r | |
| 39 | orr x0, x0, #(1 << 3) // Enable EL2 FIQ\r | |
| 40 | orr x0, x0, #(1 << 4) // Enable EL2 IRQ\r | |
| 41 | orr x0, x0, #(1 << 5) // Enable EL2 SError and Abort\r | |
| 42 | msr hcr_el2, x0 // Write back our settings\r | |
| 43 | \r | |
| 44 | msr cptr_el2, xzr // Disable copro traps to EL2\r | |
| 45 | \r | |
| 46 | ret\r | |
| 47 | \r | |
| 1bc83266 | 48 | ASM_FUNCTION_REMOVE_IF_UNREFERENCED\r |