arch/ia64/lib/flush.S

   1 /*
   2  * Cache flushing routines.
   3  *
   4  * Copyright (C) 1999-2000 Hewlett-Packard Co
   5  * Copyright (C) 1999-2000 David Mosberger-Tang <davidm@hpl.hp.com>
   6  */
   7 #include <asm/asmmacro.h>
   8 #include <asm/page.h>
   9
  10         .text
  11         .psr abi64
  12         .psr lsb
  13         .lsb
  14
  15 GLOBAL_ENTRY(ia64_flush_icache_page)
  16         UNW(.prologue)
  17         alloc r2=ar.pfs,1,0,0,0
  18         UNW(.save ar.lc, r3)
  19         mov r3=ar.lc                    // save ar.lc
  20
  21         .body
  22
  23         mov r8=PAGE_SIZE/64-1           // repeat/until loop
  24         ;;
  25         mov ar.lc=r8
  26         add r8=32,in0
  27         ;;
  28 .Loop1: fc in0                          // issuable on M0 only
  29         add in0=64,in0
  30         fc r8
  31         add r8=64,r8
  32         br.cloop.sptk.few .Loop1
  33         ;;
  34         sync.i
  35         ;;
  36         srlz.i
  37         ;;
  38         mov ar.lc=r3                    // restore ar.lc
  39         br.ret.sptk.few rp
  40 END(ia64_flush_icache_page)