/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
* Author: Tony Xie <[email protected]>
*/
#include <linux/linkage.h>
#include <asm/assembler.h>
#include <asm/page.h>
.data
/*
* this code will be copied from
* ddr to sram for system resumeing.
* so it is ".data section".
*/
.align 2
ENTRY(rockchip_slp_cpu_resume)
setmode PSR_I_BIT | PSR_F_BIT | SVC_MODE, r1 @ set svc, irqs off
mrc p15, 0, r1, c0, c0, 5
and r1, r1, #0xf
cmp r1, #0
/* olny cpu0 can continue to run, the others is halt here */
beq cpu0run
secondary_loop:
wfe
b secondary_loop
cpu0run:
ldr r3, rkpm_bootdata_l2ctlr_f
cmp r3, #0
beq sp_set
ldr r3, rkpm_bootdata_l2ctlr
mcr p15, 1, r3, c9, c0, 2
sp_set:
ldr sp, rkpm_bootdata_cpusp
ldr r1, rkpm_bootdata_cpu_code
bx r1
ENDPROC(rockchip_slp_cpu_resume)
/* Parameters filled in by the kernel */
/* Flag for whether to restore L2CTLR on resume */
.global rkpm_bootdata_l2ctlr_f
rkpm_bootdata_l2ctlr_f:
.long 0
/* Saved L2CTLR to restore on resume */
.global rkpm_bootdata_l2ctlr
rkpm_bootdata_l2ctlr:
.long 0
/* CPU resume SP addr */
.globl rkpm_bootdata_cpusp
rkpm_bootdata_cpusp:
.long 0
/* CPU resume function (physical address) */
.globl rkpm_bootdata_cpu_code
rkpm_bootdata_cpu_code:
.long 0
ENTRY(rk3288_bootram_sz)
.word . - rockchip_slp_cpu_resume
Codebase Browser
linux