40 lines
763 B
ArmAsm
40 lines
763 B
ArmAsm
/*
|
|
* Cache flushing routines.
|
|
*
|
|
* Copyright (C) 1999-2001, 2005 Hewlett-Packard Co
|
|
* 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.i in0 // issuable on M2 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)
|