| // | |
| // Copyright (c) 2012-2014, 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> | |
| ASM_FUNC(ArmCallSmc) | |
| // Push x0 on the stack - The stack must always be quad-word aligned | |
| str x0, [sp, #-16]! | |
| // Load the SMC arguments values into the appropriate registers | |
| ldp x6, x7, [x0, #48] | |
| ldp x4, x5, [x0, #32] | |
| ldp x2, x3, [x0, #16] | |
| ldp x0, x1, [x0, #0] | |
| smc #0 | |
| // Pop the ARM_SMC_ARGS structure address from the stack into x9 | |
| ldr x9, [sp], #16 | |
| // Store the SMC returned values into the ARM_SMC_ARGS structure. | |
| // A SMC call can return up to 4 values - we do not need to store back x4-x7. | |
| stp x2, x3, [x9, #16] | |
| stp x0, x1, [x9, #0] | |
| mov x0, x9 | |
| ret |