arch/arm/mach-prima2/headsmp.S

   1 /*
   2  * Entry of the second core for CSR Marco dual-core SMP SoCs
   3  *
   4  * Copyright (c) 2012 Cambridge Silicon Radio Limited, a CSR plc group company.
   5  *
   6  * Licensed under GPLv2 or later.
   7  */
   8
   9 #include <linux/linkage.h>
  10 #include <linux/init.h>
  11
  12 /*
  13  * SIRFSOC specific entry point for secondary CPUs.  This provides
  14  * a "holding pen" into which all secondary cores are held until we're
  15  * ready for them to initialise.
  16  */
  17 ENTRY(sirfsoc_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(sirfsoc_secondary_startup)
  34
  35         .align
  36 1:      .long   .
  37         .long   pen_release