diff options
Diffstat (limited to 'arch/ia64/lib/flush.S')
| -rw-r--r-- | arch/ia64/lib/flush.S | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/ia64/lib/flush.S b/arch/ia64/lib/flush.S new file mode 100644 index 000000000000..29c802b19669 --- /dev/null +++ b/arch/ia64/lib/flush.S @@ -0,0 +1,39 @@ +/* + * 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) |