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//
// Copyright (c) 2012-2014, ARM Limited. All rights reserved.
//
// SPDX-License-Identifier: BSD-2-Clause-Patent
//
//
#include <AsmMacroLib.h>
.arch_extension sec
ASM_FUNC(ArmCallSmc)
push {r4-r8}
// r0 will be popped just after the SMC call
push {r0}
// Load the SMC arguments values into the appropriate registers
ldr r7, [r0, #28]
ldr r6, [r0, #24]
ldr r5, [r0, #20]
ldr r4, [r0, #16]
ldr r3, [r0, #12]
ldr r2, [r0, #8]
ldr r1, [r0, #4]
ldr r0, [r0, #0]
smc #0
// Pop the ARM_SMC_ARGS structure address from the stack into r8
pop {r8}
// Load the SMC returned values into the appropriate registers
// A SMC call can return up to 4 values - we do not need to store back r4-r7.
str r3, [r8, #12]
str r2, [r8, #8]
str r1, [r8, #4]
str r0, [r8, #0]
mov r0, r8
// Restore the registers r4-r8
pop {r4-r8}
bx lr
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