Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: (197 commits)
  sh: add spi header and r2d platform data V3
  sh: update r7780rp interrupt code
  sh: remove consistent alloc stuff from the machine vector
  sh: use declared coherent memory for dreamcast pci ethernet adapter
  sh: declared coherent memory support V2
  sh: Add support for SDK7780 board.
  sh: constify function pointer tables
  sh: Kill off -traditional for linker script.
  cdrom: Add support for Sega Dreamcast GD-ROM.
  sh: Kill off hs7751rvoip reference from arch/sh/Kconfig.
  sh: Drop r7780rp_defconfig, use r7780mp_defconfig as kbuild default.
  sh: Kill off dead HS771RVoIP board support.
  sh: r7785rp: Fix up DECLARE_INTC_DESC() arg mismatch.
  sh: r7785rp: Hook up the rest of the HL7785 FPGA IRQ vectors.
  sh: r2d - enable sm501 usb host function
  sh: remove voyagergx
  sh: r2d - add lcd planel timings to sm501 platform data
  sh: Add OHCI and UDC platform devices for SH7720.
  sh: intc - remove default interrupt priority tables
  sh: Correct pte size mismatch for X2 TLB.
  ...

1 files changed, 54 insertions, 0 deletions

diff --git a/arch/sh/lib64/clear_page.S b/arch/sh/lib64/clear_page.S
new file mode 100644
index 00000000000..007ab48ecc1
--- /dev/null
+++ b/arch/sh/lib64/clear_page.S
@@ -0,0 +1,54 @@
+/*
+   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
+
+