projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * Cache flushing routines. | |
| 3 | * | |
| 4 | * Copyright (C) 1999-2001 Hewlett-Packard Co | |
| 5 | * Copyright (C) 1999-2001 David Mosberger-Tang <davidm@hpl.hp.com> | |
| 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 | ;; | |
| 29 | .Loop: fc in0 // issuable on M0 only | |
| 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) |