LXR linux/arch/arm/mach-rockchip/sleep.S

   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  2
  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