cpu/blackfin/cache.S

   1 /* cache.S - low level cache handling routines
   2  * Copyright (C) 2003-2007 Analog Devices Inc.
   3  * Licensed under the GPL-2 or later.
   4  */
   5
   6 #include <asm/linkage.h>
   7 #include <config.h>
   8 #include <asm/blackfin.h>
   9
  10 .text
  11 .align 2
  12 ENTRY(_blackfin_icache_flush_range)
  13         R2 = -32;
  14         R2 = R0 & R2;
  15         P0 = R2;
  16         P1 = R1;
  17         CSYNC;
  18 1:
  19         IFLUSH[P0++];
  20         CC = P0 < P1(iu);
  21         IF CC JUMP 1b(bp);
  22         IFLUSH[P0];
  23         SSYNC;
  24         RTS;
  25 ENDPROC(_blackfin_icache_flush_range)
  26
  27 ENTRY(_blackfin_dcache_flush_range)
  28         R2 = -32;
  29         R2 = R0 & R2;
  30         P0 = R2;
  31         P1 = R1;
  32         CSYNC;
  33 1:
  34         FLUSH[P0++];
  35         CC = P0 < P1(iu);
  36         IF CC JUMP 1b(bp);
  37         FLUSH[P0];
  38         SSYNC;
  39         RTS;
  40 ENDPROC(_blackfin_dcache_flush_range)
  41
  42 ENTRY(_blackfin_dcache_invalidate_range)
  43         R2 = -32;
  44         R2 = R0 & R2;
  45         P0 = R2;
  46         P1 = R1;
  47         CSYNC;
  48 1:
  49         FLUSHINV[P0++];
  50         CC = P0 < P1(iu);
  51         IF CC JUMP 1b(bp);
  52
  53         /*
  54          * If the data crosses a cache line, then we'll be pointing to
  55          * the last cache line, but won't have flushed/invalidated it yet, so do
  56          * one more.
  57          */
  58         FLUSHINV[P0];
  59         SSYNC;
  60         RTS;
  61 ENDPROC(_blackfin_dcache_invalidate_range)