root/arch/arm/mach-imx/headsmp.S

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   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Copyright 2011 Freescale Semiconductor, Inc.
   4  * Copyright 2011 Linaro Ltd.
   5  */
   6 
   7 #include <linux/linkage.h>
   8 #include <linux/init.h>
   9 #include <asm/assembler.h>
  10 
  11 diag_reg_offset:
  12         .word   g_diag_reg - .
  13 
  14         .macro  set_diag_reg
  15         adr     r0, diag_reg_offset
  16         ldr     r1, [r0]
  17         add     r1, r1, r0              @ r1 = physical &g_diag_reg
  18         ldr     r0, [r1]
  19         mcr     p15, 0, r0, c15, c0, 1  @ write diagnostic register
  20         .endm
  21 
  22 ENTRY(v7_secondary_startup)
  23 ARM_BE8(setend be)                      @ go BE8 if entered LE
  24         set_diag_reg
  25         b       secondary_startup
  26 ENDPROC(v7_secondary_startup)
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