diff options
| author | Paul Mundt <lethal@linux-sh.org> | 2007-11-08 18:51:33 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2008-01-28 13:18:39 +0900 |
| commit | dd730b8ff8adfdf8d39cd060acc7223f0d374d32 (patch) | |
| tree | 24fd26e5c6e6ae72f921530693d0cf923962a895 /arch/sh64/lib/page_clear.S | |
| parent | 2c6deb5ea414c26483578d41d8537d54dd2d282f (diff) | |
sh: Move arch/sh64/lib to arch/sh/lib64.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh64/lib/page_clear.S')
| -rw-r--r-- | arch/sh64/lib/page_clear.S | 54 |
1 files changed, 0 insertions, 54 deletions
diff --git a/arch/sh64/lib/page_clear.S b/arch/sh64/lib/page_clear.S deleted file mode 100644 index ac0111d669a..00000000000 --- a/arch/sh64/lib/page_clear.S +++ /dev/null @@ -1,54 +0,0 @@ -/* - Copyright 2003 Richard Curnow, SuperH (UK) Ltd. - - This file is subject to the terms and conditions of the GNU General Public - License. See the file "COPYING" in the main directory of this archive - for more details. - - Tight version of memset for the case of just clearing a page. It turns out - that having the alloco's spaced out slightly due to the increment/branch - pair causes them to contend less for access to the cache. Similarly, - keeping the stores apart from the allocos causes less contention. => Do two - separate loops. Do multiple stores per loop to amortise the - increment/branch cost a little. - - Parameters: - r2 : source effective address (start of page) - - Always clears 4096 bytes. - - Note : alloco guarded by synco to avoid TAKum03020 erratum - -*/ - - .section .text..SHmedia32,"ax" - .little - - .balign 8 - .global sh64_page_clear -sh64_page_clear: - pta/l 1f, tr1 - pta/l 2f, tr2 - ptabs/l r18, tr0 - - movi 4096, r7 - add r2, r7, r7 - add r2, r63, r6 -1: - alloco r6, 0 - synco ! TAKum03020 - addi r6, 32, r6 - bgt/l r7, r6, tr1 - - add r2, r63, r6 -2: - st.q r6, 0, r63 - st.q r6, 8, r63 - st.q r6, 16, r63 - st.q r6, 24, r63 - addi r6, 32, r6 - bgt/l r7, r6, tr2 - - blink tr0, r63 - - |