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authorPaul Mundt <lethal@linux-sh.org>2009-08-04 17:17:00 +0900
committerPaul Mundt <lethal@linux-sh.org>2009-08-04 17:17:00 +0900
commitd14d751ff9234595639a16e53b3cf0c575946bde (patch)
tree7179ac038a54d781abc985263705d2ebc2d87919 /arch/sh/lib64
parentc7914834ef3b8a396b7e82ea34ac07cdcfe6f868 (diff)
sh64: Kill off special clear_page() implementation.
This can use the now generic clear_page() implementation, which is backed by the sh64 optimized memset routine. This also fixes up the case where PAGE_SIZE != 4kB. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/lib64')
-rw-r--r--arch/sh/lib64/Makefile2
-rw-r--r--arch/sh/lib64/clear_page.S54
2 files changed, 1 insertions, 55 deletions
diff --git a/arch/sh/lib64/Makefile b/arch/sh/lib64/Makefile
index 334bb2da36ea..1fee75aa1f98 100644
--- a/arch/sh/lib64/Makefile
+++ b/arch/sh/lib64/Makefile
@@ -11,7 +11,7 @@
# Panic should really be compiled as PIC
lib-y := udelay.o dbg.o panic.o memcpy.o memset.o \
- copy_user_memcpy.o copy_page.o clear_page.o strcpy.o strlen.o
+ copy_user_memcpy.o copy_page.o strcpy.o strlen.o
# Extracted from libgcc
lib-y += udivsi3.o udivdi3.o sdivsi3.o
diff --git a/arch/sh/lib64/clear_page.S b/arch/sh/lib64/clear_page.S
deleted file mode 100644
index 007ab48ecc1c..000000000000
--- a/arch/sh/lib64/clear_page.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 clear_page
-clear_page:
- 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
-
-