| /* | |
| * 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) |