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
  27
  28 ENTRY(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
  35 secondary_loop:
  36         wfe
  37         b       secondary_loop
  38 cpu0run:
  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
  44 sp_set:
  45         ldr     sp, rkpm_bootdata_cpusp
  46         ldr     r1, rkpm_bootdata_cpu_code
  47         bx      r1
  48 ENDPROC(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
  54 rkpm_bootdata_l2ctlr_f:
  55         .long 0
  56
  57 /* Saved L2CTLR to restore on resume */
  58         .global rkpm_bootdata_l2ctlr
  59 rkpm_bootdata_l2ctlr:
  60         .long 0
  61
  62 /* CPU resume SP addr */
  63         .globl rkpm_bootdata_cpusp
  64 rkpm_bootdata_cpusp:
  65         .long 0
  66
  67 /* CPU resume function (physical address) */
  68         .globl rkpm_bootdata_cpu_code
  69 rkpm_bootdata_cpu_code:
  70         .long 0
  71
  72 ENTRY(rk3288_bootram_sz)
  73         .word   . - rockchip_slp_cpu_resume