| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Cache flushing routines. |
| 3 | * |
| David Mosberger-Tang | 2074615 | 2005-02-18 19:09:00 -0700 | [diff] [blame^] | 4 | * Copyright (C) 1999-2001, 2005 Hewlett-Packard Co |
| 5 | * David Mosberger-Tang <davidm@hpl.hp.com> |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | */ |
| 7 | #include <asm/asmmacro.h> |
| 8 | #include <asm/page.h> |
| 9 | |
| 10 | /* |
| 11 | * flush_icache_range(start,end) |
| 12 | * Must flush range from start to end-1 but nothing else (need to |
| 13 | * be careful not to touch addresses that may be unmapped). |
| 14 | */ |
| 15 | GLOBAL_ENTRY(flush_icache_range) |
| 16 | .prologue |
| 17 | alloc r2=ar.pfs,2,0,0,0 |
| 18 | sub r8=in1,in0,1 |
| 19 | ;; |
| 20 | shr.u r8=r8,5 // we flush 32 bytes per iteration |
| 21 | .save ar.lc, r3 |
| 22 | mov r3=ar.lc // save ar.lc |
| 23 | ;; |
| 24 | |
| 25 | .body |
| 26 | |
| 27 | mov ar.lc=r8 |
| 28 | ;; |
| David Mosberger-Tang | 2074615 | 2005-02-18 19:09:00 -0700 | [diff] [blame^] | 29 | .Loop: fc.i in0 // issuable on M2 only |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | add in0=32,in0 |
| 31 | br.cloop.sptk.few .Loop |
| 32 | ;; |
| 33 | sync.i |
| 34 | ;; |
| 35 | srlz.i |
| 36 | ;; |
| 37 | mov ar.lc=r3 // restore ar.lc |
| 38 | br.ret.sptk.many rp |
| 39 | END(flush_icache_range) |