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https://github.com/ARM-software/arm-trusted-firmware.git
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c40739a68f
Move pwrc driver code to common directory, so that the same code can be re-used by both R-Car Gen3 and RZ/G2 platforms. Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> Change-Id: I75d91a44d872fe2296b15c700efacd5721385363
48 lines
760 B
ArmAsm
48 lines
760 B
ArmAsm
/*
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* Copyright (c) 2015-2019, Renesas Electronics Corporation. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <arch.h>
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#include <asm_macros.S>
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.global rcar_pwrc_switch_stack
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/*
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* x0 : jump address,
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* x1 : stack address,
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* x2 : arg,
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* x3 : stack address (temporary)
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*/
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func rcar_pwrc_switch_stack
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/* lr to stack */
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stp x29, x30, [sp,#-16]
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/* change stack pointer */
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mov x3, sp
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mov sp, x1
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/* save stack pointer */
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sub sp, sp, #16
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stp x0, x3, [sp]
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/* data synchronization barrier */
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dsb sy
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/* jump to code */
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mov x1, x0
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mov x0, x2
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blr x1
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/* load stack pointer */
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ldp x0, x2, [sp,#0]
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/* change stack pointer */
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mov sp, x2
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/* return */
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ldp x29, x30, [sp,#-16]
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ret
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endfunc rcar_pwrc_switch_stack
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