arch/arm/mach-tegra/lowlevel_init.S

   1 /*
   2  * SoC-specific setup info
   3  *
   4  * (C) Copyright 2010,2011
   5  * NVIDIA Corporation <www.nvidia.com>
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10 #include <config.h>
  11 #include <linux/linkage.h>
  12
  13 #ifdef CONFIG_ARM64
  14         .align  5
  15 ENTRY(reset_cpu)
  16         /* get address for global reset register */
  17         ldr     x1, =PRM_RSTCTRL
  18         ldr     w3, [x1]
  19         /* force reset */
  20         orr     w3, w3, #0x10
  21         str     w3, [x1]
  22         mov     w0, w0
  23 1:
  24         b       1b
  25 ENDPROC(reset_cpu)
  26 #else
  27         .align  5
  28 ENTRY(reset_cpu)
  29         ldr     r1, rstctl                      @ get addr for global reset
  30                                                 @ reg
  31         ldr     r3, [r1]
  32         orr     r3, r3, #0x10
  33         str     r3, [r1]                        @ force reset
  34         mov     r0, r0
  35 _loop_forever:
  36         b       _loop_forever
  37 rstctl:
  38         .word   PRM_RSTCTRL
  39 ENDPROC(reset_cpu)
  40 #endif