arch/m68knommu/lib/semaphore.S

   1 /*
   2  *  linux/arch/m68k/lib/semaphore.S
   3  *
   4  *  Copyright (C) 1996  Linus Torvalds
   5  *
   6  *  m68k version by Andreas Schwab
   7  *
   8  *  MAR/1999 -- modified to support ColdFire (gerg@snapgear.com)
   9  */
  10
  11 #include <linux/linkage.h>
  12 #include <linux/config.h>
  13 #include <asm/semaphore.h>
  14
  15 /*
  16  * "down_failed" is called with the eventual return address
  17  * in %a0, and the address of the semaphore in %a1. We need
  18  * to increment the number of waiters on the semaphore,
  19  * call "__down()", and then eventually return to try again.
  20  */
  21 ENTRY(__down_failed)
  22 #ifdef CONFIG_COLDFIRE
  23         subl #12,%sp
  24         moveml %a0/%d0/%d1,(%sp)
  25 #else
  26         moveml %a0/%d0/%d1,-(%sp)
  27 #endif
  28         movel %a1,-(%sp)
  29         jbsr __down
  30         movel (%sp)+,%a1
  31         movel (%sp)+,%d0
  32         movel (%sp)+,%d1
  33         rts
  34
  35 ENTRY(__down_failed_interruptible)
  36         movel %a0,-(%sp)
  37         movel %d1,-(%sp)
  38         movel %a1,-(%sp)
  39         jbsr __down_interruptible
  40         movel (%sp)+,%a1
  41         movel (%sp)+,%d1
  42         rts
  43
  44 ENTRY(__up_wakeup)
  45 #ifdef CONFIG_COLDFIRE
  46         subl #12,%sp
  47         moveml %a0/%d0/%d1,(%sp)
  48 #else
  49         moveml %a0/%d0/%d1,-(%sp)
  50 #endif
  51         movel %a1,-(%sp)
  52         jbsr __up
  53         movel (%sp)+,%a1
  54         movel (%sp)+,%d0
  55         movel (%sp)+,%d1
  56         rts
  57
  58 ENTRY(__down_failed_trylock)
  59         movel %a0,-(%sp)
  60         movel %d1,-(%sp)
  61         movel %a1,-(%sp)
  62         jbsr __down_trylock
  63         movel (%sp)+,%a1
  64         movel (%sp)+,%d1
  65         movel (%sp)+,%a0
  66         rts
  67