| #======================================================================================== | |
| # Copyright (c) 2011-2013, ARM Limited. All rights reserved. | |
| # | |
| # 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. | |
| # | |
| #======================================================================================= | |
| #include <AsmMacroIoLibV8.h> | |
| #include <Chipset/AArch64.h> | |
| // Setup EL1 while in EL1 | |
| ASM_FUNC(SetupExceptionLevel1) | |
| mov x5, x30 // Save LR | |
| mov x0, #CPACR_CP_FULL_ACCESS | |
| bl ASM_PFX(ArmWriteCpacr) // Disable copro traps to EL1 | |
| ret x5 | |
| // Setup EL2 while in EL2 | |
| ASM_FUNC(SetupExceptionLevel2) | |
| msr sctlr_el2, xzr | |
| mrs x0, hcr_el2 // Read EL2 Hypervisor configuration Register | |
| // Send all interrupts to their respective Exception levels for EL2 | |
| orr x0, x0, #(1 << 3) // Enable EL2 FIQ | |
| orr x0, x0, #(1 << 4) // Enable EL2 IRQ | |
| orr x0, x0, #(1 << 5) // Enable EL2 SError and Abort | |
| msr hcr_el2, x0 // Write back our settings | |
| msr cptr_el2, xzr // Disable copro traps to EL2 | |
| ret | |
| ASM_FUNCTION_REMOVE_IF_UNREFERENCED |