// | |
// Copyright (c) 2012-2014, ARM Limited. All rights reserved. | |
// Copyright (c) 2014-2016, Linaro Limited. All rights reserved. | |
// | |
// SPDX-License-Identifier: BSD-2-Clause-Patent | |
// | |
// | |
#include <AsmMacroIoLibV8.h> | |
ASM_FUNC(ArmCallHvc) | |
// Push x0 on the stack - The stack must always be quad-word aligned | |
str x0, [sp, #-16]! | |
// Load the HVC 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] | |
hvc #0 | |
// Pop the ARM_HVC_ARGS structure address from the stack into x9 | |
ldr x9, [sp], #16 | |
// Store the HVC returned values into the ARM_HVC_ARGS structure. | |
// A HVC call can return up to 4 values | |
stp x2, x3, [x9, #16] | |
stp x0, x1, [x9, #0] | |
mov x0, x9 | |
ret |