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| author | Alistair Delva <adelva@google.com> | 2021-02-16 21:01:22 +0000 |
|---|---|---|
| committer | Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com> | 2021-02-16 21:01:22 +0000 |
| commit | efb2826bb8160e2d8e0fcec85133a7468484f9fd (patch) | |
| tree | 37a21c69306801ee7cdda5167a30896c8740155b /drivers/renesas/common/pwrc/call_sram.S | |
| parent | b00a71fc312c9781fa6f404dccfb55b062b2ccac (diff) | |
| parent | faa476c0caaa598afa5a6109d17102db5fe35ec6 (diff) | |
| download | platform_external_arm-trusted-firmware-master.tar.gz platform_external_arm-trusted-firmware-master.tar.bz2 platform_external_arm-trusted-firmware-master.zip | |
Merge branch 'aosp/upstream-master' into HEAD am: faa476c0caHEADandroid-s-beta-5android-s-beta-4android-s-beta-3android-s-beta-2android-s-beta-1mastermain-cg-testing-releaseandroid-s-beta-5android-s-beta-4
Original change: https://android-review.googlesource.com/c/platform/external/arm-trusted-firmware/+/1589611
MUST ONLY BE SUBMITTED BY AUTOMERGER
Change-Id: I3a25534ceed4f8e188510641080d8b8ed49b8f62
Diffstat (limited to 'drivers/renesas/common/pwrc/call_sram.S')
| -rw-r--r-- | drivers/renesas/common/pwrc/call_sram.S | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/drivers/renesas/common/pwrc/call_sram.S b/drivers/renesas/common/pwrc/call_sram.S new file mode 100644 index 000000000..aa8644cb9 --- /dev/null +++ b/drivers/renesas/common/pwrc/call_sram.S @@ -0,0 +1,48 @@ +/* + * Copyright (c) 2015-2019, Renesas Electronics Corporation. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <arch.h> +#include <asm_macros.S> + +.global rcar_pwrc_switch_stack + +/* + * x0 : jump address, + * x1 : stack address, + * x2 : arg, + * x3 : stack address (temporary) + */ +func rcar_pwrc_switch_stack + + /* lr to stack */ + stp x29, x30, [sp,#-16] + + /* change stack pointer */ + mov x3, sp + mov sp, x1 + + /* save stack pointer */ + sub sp, sp, #16 + stp x0, x3, [sp] + + /* data synchronization barrier */ + dsb sy + + /* jump to code */ + mov x1, x0 + mov x0, x2 + blr x1 + + /* load stack pointer */ + ldp x0, x2, [sp,#0] + + /* change stack pointer */ + mov sp, x2 + + /* return */ + ldp x29, x30, [sp,#-16] + ret +endfunc rcar_pwrc_switch_stack |