headsmp.S 925 B

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  1. /*
  2. * linux/arch/arm/plat-versatile/headsmp.S
  3. *
  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. __INIT
  14. /*
  15. * Realview/Versatile Express specific entry point for secondary CPUs.
  16. * This provides a "holding pen" into which all secondary cores are held
  17. * until we're ready for them to initialise.
  18. */
  19. ENTRY(versatile_secondary_startup)
  20. mrc p15, 0, r0, c0, c0, 5
  21. and r0, r0, #15
  22. adr r4, 1f
  23. ldmia r4, {r5, r6}
  24. sub r4, r4, r5
  25. add r6, r6, r4
  26. pen: ldr r7, [r6]
  27. cmp r7, r0
  28. bne pen
  29. /*
  30. * we've been released from the holding pen: secondary_stack
  31. * should now contain the SVC stack for this core
  32. */
  33. b secondary_startup
  34. .align
  35. 1: .long .
  36. .long pen_release