Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6: (98 commits)
  sparc: move select of ARCH_SUPPORTS_MSI
  sparc: drop SUN_IO
  sparc: unify sections.h
  sparc: use .data.init_task section for init_thread_union
  sparc: fix array overrun check in of_device_64.c
  sparc: unify module.c
  sparc64: prepare module_64.c for unification
  sparc64: use bit neutral Elf symbols
  sparc: unify module.h
  sparc: introduce CONFIG_BITS
  sparc: fix hardirq.h removal fallout
  sparc64: do not export pus_fs_struct
  sparc: use sparc64 version of scatterlist.h
  sparc: Commonize memcmp assembler.
  sparc: Unify strlen assembler.
  sparc: Add asm/asm.h
  sparc: Kill memcmp_32.S code which has been ifdef'd out for centuries.
  sparc: replace for_each_cpu_mask_nr with for_each_cpu
  sparc: fix sparse warnings in irq_32.c
  sparc: add include guards to kernel.h
  ...

1 files changed, 61 insertions, 0 deletions

diff --git a/arch/sparc/lib/NG2page.S b/arch/sparc/lib/NG2page.S
new file mode 100644
index 00000000000..73b6b7c72cb
--- /dev/null
+++ b/arch/sparc/lib/NG2page.S
@@ -0,0 +1,61 @@
+/* NG2page.S: Niagara-2 optimized clear and copy page.
+ *
+ * Copyright (C) 2007 (davem@davemloft.net)
+ */
+
+#include <asm/asi.h>
+#include <asm/page.h>
+#include <asm/visasm.h>
+
+	.text
+	.align	32
+
+	/* This is heavily simplified from the sun4u variants
+	 * because Niagara-2 does not have any D-cache aliasing issues.
+	 */
+NG2copy_user_page:	/* %o0=dest, %o1=src, %o2=vaddr */
+	prefetch	[%o1 + 0x00], #one_read
+	prefetch	[%o1 + 0x40], #one_read
+	VISEntryHalf
+	set		PAGE_SIZE, %g7
+	sub		%o0, %o1, %g3
+1:	stxa		%g0, [%o1 + %g3] ASI_BLK_INIT_QUAD_LDD_P
+	subcc		%g7, 64, %g7
+	ldda		[%o1] ASI_BLK_P, %f0
+	stda		%f0, [%o1 + %g3] ASI_BLK_P
+	add		%o1, 64, %o1
+	bne,pt		%xcc, 1b
+	 prefetch	[%o1 + 0x40], #one_read
+	membar		#Sync
+	VISExitHalf
+	retl
+	 nop
+
+#define BRANCH_ALWAYS	0x10680000
+#define NOP		0x01000000
+#define NG_DO_PATCH(OLD, NEW)	\
+	sethi	%hi(NEW), %g1; \
+	or	%g1, %lo(NEW), %g1; \
+	sethi	%hi(OLD), %g2; \
+	or	%g2, %lo(OLD), %g2; \
+	sub	%g1, %g2, %g1; \
+	sethi	%hi(BRANCH_ALWAYS), %g3; \
+	sll	%g1, 11, %g1; \
+	srl	%g1, 11 + 2, %g1; \
+	or	%g3, %lo(BRANCH_ALWAYS), %g3; \
+	or	%g3, %g1, %g3; \
+	stw	%g3, [%g2]; \
+	sethi	%hi(NOP), %g3; \
+	or	%g3, %lo(NOP), %g3; \
+	stw	%g3, [%g2 + 0x4]; \
+	flush	%g2;
+
+	.globl	niagara2_patch_pageops
+	.type	niagara2_patch_pageops,#function
+niagara2_patch_pageops:
+	NG_DO_PATCH(copy_user_page, NG2copy_user_page)
+	NG_DO_PATCH(_clear_page, NGclear_page)
+	NG_DO_PATCH(clear_user_page, NGclear_user_page)
+	retl
+	 nop
+	.size	niagara2_patch_pageops,.-niagara2_patch_pageops