| /* |
| * 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) |
