1/* 2 * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd 3 * Author: Tony Xie <tony.xie@rock-chips.com> 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms and conditions of the GNU General Public License, 7 * version 2, as published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 * more details. 13 * 14 */ 15 16#include <linux/linkage.h> 17#include <asm/assembler.h> 18#include <asm/memory.h> 19 20.data 21/* 22 * this code will be copied from 23 * ddr to sram for system resumeing. 24 * so it is ".data section". 25 */ 26.align 27 28ENTRY(rockchip_slp_cpu_resume) 29 setmode PSR_I_BIT | PSR_F_BIT | SVC_MODE, r1 @ set svc, irqs off 30 mrc p15, 0, r1, c0, c0, 5 31 and r1, r1, #0xf 32 cmp r1, #0 33 /* olny cpu0 can continue to run, the others is halt here */ 34 beq cpu0run 35secondary_loop: 36 wfe 37 b secondary_loop 38cpu0run: 39 ldr r3, rkpm_bootdata_l2ctlr_f 40 cmp r3, #0 41 beq sp_set 42 ldr r3, rkpm_bootdata_l2ctlr 43 mcr p15, 1, r3, c9, c0, 2 44sp_set: 45 ldr sp, rkpm_bootdata_cpusp 46 ldr r1, rkpm_bootdata_cpu_code 47 bx r1 48ENDPROC(rockchip_slp_cpu_resume) 49 50/* Parameters filled in by the kernel */ 51 52/* Flag for whether to restore L2CTLR on resume */ 53 .global rkpm_bootdata_l2ctlr_f 54rkpm_bootdata_l2ctlr_f: 55 .long 0 56 57/* Saved L2CTLR to restore on resume */ 58 .global rkpm_bootdata_l2ctlr 59rkpm_bootdata_l2ctlr: 60 .long 0 61 62/* CPU resume SP addr */ 63 .globl rkpm_bootdata_cpusp 64rkpm_bootdata_cpusp: 65 .long 0 66 67/* CPU resume function (physical address) */ 68 .globl rkpm_bootdata_cpu_code 69rkpm_bootdata_cpu_code: 70 .long 0 71 72ENTRY(rk3288_bootram_sz) 73 .word . - rockchip_slp_cpu_resume 74