board/freescale/ls1021aqds/psci.S

   1 /*
   2  * Copyright 2016 NXP Semiconductor.
   3  * Author: Wang Dongsheng <dongsheng.wang@freescale.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <config.h>
   9 #include <linux/linkage.h>
  10
  11 #include <asm/armv7.h>
  12 #include <asm/psci.h>
  13
  14         .pushsection ._secure.text, "ax"
  15
  16         .arch_extension sec
  17
  18         .align  5
  19
  20 .globl  psci_system_off
  21 psci_system_off:
  22         @ Get QIXIS base address
  23         movw    r1, #(QIXIS_BASE & 0xffff)
  24         movt    r1, #(QIXIS_BASE >> 16)
  25
  26         ldrb    r2, [r1, #QIXIS_PWR_CTL]
  27         orr     r2, r2, #QIXIS_PWR_CTL_POWEROFF
  28         strb    r2, [r1, #QIXIS_PWR_CTL]
  29
  30 1:      wfi
  31         b       1b
  32
  33         .popsection