arch/arm/mach-exynos/headsmp.S

   1 /*
   2  *
   3  *  Cloned from linux/arch/arm/mach-realview/headsmp.S
   4  *
   5  *  Copyright (c) 2003 ARM Limited
   6  *  All Rights Reserved
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12 #include <linux/linkage.h>
  13 #include <linux/init.h>
  14
  15 /*
  16  * exynos4 specific entry point for secondary CPUs.  This provides
  17  * a "holding pen" into which all secondary cores are held until we're
  18  * ready for them to initialise.
  19  */
  20 ENTRY(exynos4_secondary_startup)
  21         mrc     p15, 0, r0, c0, c0, 5
  22         and     r0, r0, #15
  23         adr     r4, 1f
  24         ldmia   r4, {r5, r6}
  25         sub     r4, r4, r5
  26         add     r6, r6, r4
  27 pen:    ldr     r7, [r6]
  28         cmp     r7, r0
  29         bne     pen
  30
  31         /*
  32          * we've been released from the holding pen: secondary_stack
  33          * should now contain the SVC stack for this core
  34          */
  35         b       secondary_startup
  36 ENDPROC(exynos4_secondary_startup)
  37
  38         .align 2
  39 1:      .long   .
  40         .long   pen_release