arch/arm/mach-vexpress/dcscb_setup.S

   1 /*
   2  * arch/arm/include/asm/dcscb_setup.S
   3  *
   4  * Created by:  Dave Martin, 2012-06-22
   5  * Copyright:   (C) 2012-2013  Linaro Limited
   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
  12 #include <linux/linkage.h>
  13
  14
  15 ENTRY(dcscb_power_up_setup)
  16
  17         cmp     r0, #0                  @ check affinity level
  18         beq     2f
  19
  20 /*
  21  * Enable cluster-level coherency, in preparation for turning on the MMU.
  22  * The ACTLR SMP bit does not need to be set here, because cpu_resume()
  23  * already restores that.
  24  *
  25  * A15/A7 may not require explicit L2 invalidation on reset, dependent
  26  * on hardware integration decisions.
  27  * For now, this code assumes that L2 is either already invalidated,
  28  * or invalidation is not required.
  29  */
  30
  31         b       cci_enable_port_for_self
  32
  33 2:      @ Implementation-specific local CPU setup operations should go here,
  34         @ if any.  In this case, there is nothing to do.
  35
  36         bx      lr
  37
  38 ENDPROC(dcscb_power_up_setup)