[SPARC64]: Niagara optimized memset/bzero/clear_user.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc64/kernel/head.S b/arch/sparc64/kernel/head.S
index 3222c82..8c6c469 100644
--- a/arch/sparc64/kernel/head.S
+++ b/arch/sparc64/kernel/head.S
@@ -420,6 +420,8 @@
/* Patch copy/clear ops. */
call niagara_patch_copyops
nop
+ call niagara_patch_bzero
+ nop
call niagara_patch_pageops
nop
diff --git a/arch/sparc64/lib/Makefile b/arch/sparc64/lib/Makefile
index 3d0e9a2..8812ded 100644
--- a/arch/sparc64/lib/Makefile
+++ b/arch/sparc64/lib/Makefile
@@ -12,7 +12,7 @@
U1memcpy.o U1copy_from_user.o U1copy_to_user.o \
U3memcpy.o U3copy_from_user.o U3copy_to_user.o U3patch.o \
NGmemcpy.o NGcopy_from_user.o NGcopy_to_user.o NGpatch.o \
- NGpage.o \
+ NGpage.o NGbzero.o \
copy_in_user.o user_fixup.o memmove.o \
mcount.o ipcsum.o rwsem.o xor.o find_bit.o delay.o
diff --git a/arch/sparc64/lib/NGbzero.S b/arch/sparc64/lib/NGbzero.S
new file mode 100644
index 0000000..fef584f
--- /dev/null
+++ b/arch/sparc64/lib/NGbzero.S
@@ -0,0 +1,162 @@
+/* NGbzero.S: Niagara optimized memset/clear_user.
+ *
+ * Copyright (C) 2006 David S. Miller (davem@davemloft.net)
+ */
+#include <asm/asi.h>
+
+#define EX_ST(x,y) \
+98: x,y; \
+ .section .fixup; \
+ .align 4; \
+99: retl; \
+ mov %o1, %o0; \
+ .section __ex_table; \
+ .align 4; \
+ .word 98b, 99b; \
+ .text; \
+ .align 4;
+
+ .text
+
+ .globl NGmemset
+ .type NGmemset, #function
+NGmemset: /* %o0=buf, %o1=pat, %o2=len */
+ and %o1, 0xff, %o3
+ mov %o2, %o1
+ sllx %o3, 8, %g1
+ or %g1, %o3, %o2
+ sllx %o2, 16, %g1
+ or %g1, %o2, %o2
+ sllx %o2, 32, %g1
+ ba,pt %xcc, 1f
+ or %g1, %o2, %o2
+
+ .globl NGbzero
+ .type NGbzero, #function
+NGbzero:
+ clr %o2
+1: brz,pn %o1, NGbzero_return
+ mov %o0, %o3
+
+ /* %o5: saved %asi, restored at NGbzero_done
+ * %g7: store-init %asi to use
+ * %o4: non-store-init %asi to use
+ */
+ rd %asi, %o5
+ mov ASI_BLK_INIT_QUAD_LDD_P, %g7
+ mov ASI_P, %o4
+ wr %o4, 0x0, %asi
+
+NGbzero_from_clear_user:
+ cmp %o1, 15
+ bl,pn %icc, NGbzero_tiny
+ andcc %o0, 0x7, %g1
+ be,pt %xcc, 2f
+ mov 8, %g2
+ sub %g2, %g1, %g1
+ sub %o1, %g1, %o1
+1: EX_ST(stba %o2, [%o0 + 0x00] %asi)
+ subcc %g1, 1, %g1
+ bne,pt %xcc, 1b
+ add %o0, 1, %o0
+2: cmp %o1, 128
+ bl,pn %icc, NGbzero_medium
+ andcc %o0, (64 - 1), %g1
+ be,pt %xcc, NGbzero_pre_loop
+ mov 64, %g2
+ sub %g2, %g1, %g1
+ sub %o1, %g1, %o1
+1: EX_ST(stxa %o2, [%o0 + 0x00] %asi)
+ subcc %g1, 8, %g1
+ bne,pt %xcc, 1b
+ add %o0, 8, %o0
+
+NGbzero_pre_loop:
+ wr %g7, 0x0, %asi
+ andn %o1, (64 - 1), %g1
+ sub %o1, %g1, %o1
+NGbzero_loop:
+ EX_ST(stxa %o2, [%o0 + 0x00] %asi)
+ EX_ST(stxa %o2, [%o0 + 0x08] %asi)
+ EX_ST(stxa %o2, [%o0 + 0x10] %asi)
+ EX_ST(stxa %o2, [%o0 + 0x18] %asi)
+ EX_ST(stxa %o2, [%o0 + 0x20] %asi)
+ EX_ST(stxa %o2, [%o0 + 0x28] %asi)
+ EX_ST(stxa %o2, [%o0 + 0x30] %asi)
+ EX_ST(stxa %o2, [%o0 + 0x38] %asi)
+ subcc %g1, 64, %g1
+ bne,pt %xcc, NGbzero_loop
+ add %o0, 64, %o0
+
+ wr %o4, 0x0, %asi
+ brz,pn %o1, NGbzero_done
+NGbzero_medium:
+ andncc %o1, 0x7, %g1
+ be,pn %xcc, 2f
+ sub %o1, %g1, %o1
+1: EX_ST(stxa %o2, [%o0 + 0x00] %asi)
+ subcc %g1, 8, %g1
+ bne,pt %xcc, 1b
+ add %o0, 8, %o0
+2: brz,pt %o1, NGbzero_done
+ nop
+
+NGbzero_tiny:
+1: EX_ST(stba %o2, [%o0 + 0x00] %asi)
+ subcc %o1, 1, %o1
+ bne,pt %icc, 1b
+ add %o0, 1, %o0
+
+ /* fallthrough */
+
+NGbzero_done:
+ wr %o5, 0x0, %asi
+
+NGbzero_return:
+ retl
+ mov %o3, %o0
+ .size NGbzero, .-NGbzero
+ .size NGmemset, .-NGmemset
+
+ .globl NGclear_user
+ .type NGclear_user, #function
+NGclear_user: /* %o0=buf, %o1=len */
+ rd %asi, %o5
+ brz,pn %o1, NGbzero_done
+ clr %o3
+ cmp %o5, ASI_AIUS
+ bne,pn %icc, NGbzero
+ clr %o2
+ mov ASI_BLK_INIT_QUAD_LDD_AIUS, %g7
+ ba,pt %xcc, NGbzero_from_clear_user
+ mov ASI_AIUS, %o4
+ .size NGclear_user, .-NGclear_user
+
+#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 niagara_patch_bzero
+ .type niagara_patch_bzero,#function
+niagara_patch_bzero:
+ NG_DO_PATCH(memset, NGmemset)
+ NG_DO_PATCH(__bzero, NGbzero)
+ NG_DO_PATCH(__clear_user, NGclear_user)
+ retl
+ nop
+ .size niagara_patch_bzero,.-niagara_patch_bzero