arch/arm/mach-ux500/headsmp.S

   1 /*
   2  *  Copyright (c) 2009 ST-Ericsson
   3  *      This file is based  ARM Realview platform
   4  *  Copyright (c) 2003 ARM Limited
   5  *  All Rights Reserved
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11 #include <linux/linkage.h>
  12 #include <linux/init.h>
  13
  14 /*
  15  * U8500 specific entry point for secondary CPUs.
  16  */
  17 ENTRY(u8500_secondary_startup)
  18         mrc     p15, 0, r0, c0, c0, 5
  19         and     r0, r0, #15
  20         adr     r4, 1f
  21         ldmia   r4, {r5, r6}
  22         sub     r4, r4, r5
  23         add     r6, r6, r4
  24 pen:    ldr     r7, [r6]
  25         cmp     r7, r0
  26         bne     pen
  27
  28         /*
  29          * we've been released from the holding pen: secondary_stack
  30          * should now contain the SVC stack for this core
  31          */
  32         b       secondary_startup
  33 ENDPROC(u8500_secondary_startup)
  34
  35         .align 2
  36 1:      .long   .
  37         .long   pen_release