arch/arm/mach-socfpga/headsmp.S

   1 /*
   2  *  Copyright (c) 2003 ARM Limited
   3  *  Copyright (c) u-boot contributors
   4  *  Copyright (c) 2012 Pavel Machek <pavel@denx.de>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10 #include <linux/linkage.h>
  11 #include <linux/init.h>
  12 #include <asm/memory.h>
  13
  14         .arch   armv7-a
  15
  16 ENTRY(secondary_trampoline)
  17         /* CPU1 will always fetch from 0x0 when it is brought out of reset.
  18          * Thus, we can just subtract the PAGE_OFFSET to get the physical
  19          * address of &cpu1start_addr. This would not work for platforms
  20          * where the physical memory does not start at 0x0.
  21          */
  22         adr     r0, 1f
  23         ldmia   r0, {r1, r2}
  24         sub     r2, r2, #PAGE_OFFSET
  25         ldr     r3, [r2]
  26         ldr     r4, [r3]
  27         bx      r4
  28
  29         .align
  30 1:      .long   .
  31         .long   socfpga_cpu1start_addr
  32 ENTRY(secondary_trampoline_end)
  33
  34 ENTRY(socfpga_secondary_startup)
  35        bl      v7_invalidate_l1
  36        b       secondary_startup
  37 ENDPROC(socfpga_secondary_startup)