arch/m68k/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
   9 #include <linux/linkage.h>
  10 #include <asm/semaphore.h>
  11
  12 /*
  13  * The semaphore operations have a special calling sequence that
  14  * allow us to do a simpler in-line version of them. These routines
  15  * need to convert that sequence back into the C sequence when
  16  * there is contention on the semaphore.
  17  */
  18 ENTRY(__down_failed)
  19         moveml %a0/%d0/%d1,-(%sp)
  20         movel %a1,-(%sp)
  21         jbsr __down
  22         movel (%sp)+,%a1
  23         moveml (%sp)+,%a0/%d0/%d1
  24         rts
  25
  26 ENTRY(__down_failed_interruptible)
  27         movel %a0,-(%sp)
  28         movel %d1,-(%sp)
  29         movel %a1,-(%sp)
  30         jbsr __down_interruptible
  31         movel (%sp)+,%a1
  32         movel (%sp)+,%d1
  33         movel (%sp)+,%a0
  34         rts
  35
  36 ENTRY(__down_failed_trylock)
  37         movel %a0,-(%sp)
  38         movel %d1,-(%sp)
  39         movel %a1,-(%sp)
  40         jbsr __down_trylock
  41         movel (%sp)+,%a1
  42         movel (%sp)+,%d1
  43         movel (%sp)+,%a0
  44         rts
  45
  46 ENTRY(__up_wakeup)
  47         moveml %a0/%d0/%d1,-(%sp)
  48         movel %a1,-(%sp)
  49         jbsr __up
  50         movel (%sp)+,%a1
  51         moveml (%sp)+,%a0/%d0/%d1
  52         rts
  53