diff options
| author | Tom Rini <trini@konsulko.com> | 2018-09-04 17:45:53 -0400 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2018-09-04 17:45:53 -0400 |
| commit | b2f90c461e999a1b1a03c7f9f79069b5440b2306 (patch) | |
| tree | 090dc33e83808ccce62798d7aedba4e4f5347ecb /arch/arm/mach-imx/mx7/psci-suspend.S | |
| parent | 3005162a43adcfd9cbb524960ad9ff44e809980c (diff) | |
| parent | c1d1543ebc6e1fb026d0d7ac96d865faa7567555 (diff) | |
Merge branch 'master' of git://git.denx.de/u-boot-imx
Diffstat (limited to 'arch/arm/mach-imx/mx7/psci-suspend.S')
| -rw-r--r-- | arch/arm/mach-imx/mx7/psci-suspend.S | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/mx7/psci-suspend.S b/arch/arm/mach-imx/mx7/psci-suspend.S new file mode 100644 index 0000000000..a21403f73f --- /dev/null +++ b/arch/arm/mach-imx/mx7/psci-suspend.S @@ -0,0 +1,67 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright 2018 NXP + */ + +#include <config.h> +#include <linux/linkage.h> + +#include <asm/armv7.h> +#include <asm/psci.h> + + .pushsection ._secure.text, "ax" + + .arch_extension sec + +.globl v7_invalidate_l1 +v7_invalidate_l1: + mov r0, #0 + mcr p15, 2, r0, c0, c0, 0 + mrc p15, 1, r0, c0, c0, 0 + + movw r1, #0x7fff + and r2, r1, r0, lsr #13 + + movw r1, #0x3ff + + and r3, r1, r0, lsr #3 @ NumWays - 1 + add r2, r2, #1 @ NumSets + + and r0, r0, #0x7 + add r0, r0, #4 @ SetShift + + clz r1, r3 @ WayShift + add r4, r3, #1 @ NumWays +1: + sub r2, r2, #1 @ NumSets-- + mov r3, r4 @ Temp = NumWays +2: + subs r3, r3, #1 @ Temp-- + mov r5, r3, lsl r1 + mov r6, r2, lsl r0 + orr r5, r5, r6 @ Reg = (Temp<<WayShift)|(NumSets<<SetShift) + mcr p15, 0, r5, c7, c6, 2 + bgt 2b + cmp r2, #0 + bgt 1b + dsb st + isb + mov pc, lr + +.globl psci_system_resume +psci_system_resume: + mov sp, r0 + + /* invalidate L1 I-cache first */ + mov r6, #0x0 + mcr p15, 0, r6, c7, c5, 0 + mcr p15, 0, r6, c7, c5, 6 + /* enable the Icache and branch prediction */ + mov r6, #0x1800 + mcr p15, 0, r6, c1, c0, 0 + isb + + bl v7_invalidate_l1 + b imx_system_resume + + .popsection |