headsmp.S 994 B

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  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. #include <asm/assembler.h>
  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. ARM_BE8(setend be)
  22. mrc p15, 0, r0, c0, c0, 5
  23. and r0, r0, #15
  24. adr r4, 1f
  25. ldmia r4, {r5, r6}
  26. sub r4, r4, r5
  27. add r6, r6, r4
  28. pen: ldr r7, [r6]
  29. cmp r7, r0
  30. bne pen
  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. .align 2
  38. 1: .long .
  39. .long pen_release