Subversion Repositories or1k

/*
 * Cache flushing routines.
 *
 * Copyright (C) 1999-2001 Hewlett-Packard Co
 * Copyright (C) 1999-2001 David Mosberger-Tang <davidm@hpl.hp.com>
 */
#include <asm/asmmacro.h>
#include <asm/page.h>

        /*
         * flush_icache_range(start,end)
         *      Must flush range from start to end-1 but nothing else (need to
         *      be careful not to touch addresses that may be unmapped).
         */
GLOBAL_ENTRY(flush_icache_range)
        .prologue
        alloc r2=ar.pfs,2,0,0,0
        sub r8=in1,in0,1
        ;;
        shr.u r8=r8,5                   // we flush 32 bytes per iteration
        .save ar.lc, r3
        mov r3=ar.lc                    // save ar.lc
        ;;

        .body

        mov ar.lc=r8
        ;;
.Loop:  fc in0                          // issuable on M0 only
        add in0=32,in0
        br.cloop.sptk.few .Loop
        ;;
        sync.i
        ;;
        srlz.i
        ;;
        mov ar.lc=r3                    // restore ar.lc
        br.ret.sptk.many rp
END(flush_icache_range)