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-rw-r--r--arch/sparc/lib/NG4copy_page.S57
1 files changed, 57 insertions, 0 deletions
diff --git a/arch/sparc/lib/NG4copy_page.S b/arch/sparc/lib/NG4copy_page.S
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+++ b/arch/sparc/lib/NG4copy_page.S
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+/* NG4copy_page.S: Niagara-4 optimized copy page.
+ *
+ * Copyright (C) 2012 (davem@davemloft.net)
+ */
+
+#include <asm/asi.h>
+#include <asm/page.h>
+
+ .text
+ .align 32
+
+ .register %g2, #scratch
+ .register %g3, #scratch
+
+ .globl NG4copy_user_page
+NG4copy_user_page: /* %o0=dest, %o1=src, %o2=vaddr */
+ prefetch [%o1 + 0x000], #n_reads_strong
+ prefetch [%o1 + 0x040], #n_reads_strong
+ prefetch [%o1 + 0x080], #n_reads_strong
+ prefetch [%o1 + 0x0c0], #n_reads_strong
+ set PAGE_SIZE, %g7
+ prefetch [%o1 + 0x100], #n_reads_strong
+ prefetch [%o1 + 0x140], #n_reads_strong
+ prefetch [%o1 + 0x180], #n_reads_strong
+ prefetch [%o1 + 0x1c0], #n_reads_strong
+1:
+ ldx [%o1 + 0x00], %o2
+ subcc %g7, 0x40, %g7
+ ldx [%o1 + 0x08], %o3
+ ldx [%o1 + 0x10], %o4
+ ldx [%o1 + 0x18], %o5
+ ldx [%o1 + 0x20], %g1
+ stxa %o2, [%o0] ASI_ST_BLKINIT_MRU_P
+ add %o0, 0x08, %o0
+ ldx [%o1 + 0x28], %g2
+ stxa %o3, [%o0] ASI_ST_BLKINIT_MRU_P
+ add %o0, 0x08, %o0
+ ldx [%o1 + 0x30], %g3
+ stxa %o4, [%o0] ASI_ST_BLKINIT_MRU_P
+ add %o0, 0x08, %o0
+ ldx [%o1 + 0x38], %o2
+ add %o1, 0x40, %o1
+ stxa %o5, [%o0] ASI_ST_BLKINIT_MRU_P
+ add %o0, 0x08, %o0
+ stxa %g1, [%o0] ASI_ST_BLKINIT_MRU_P
+ add %o0, 0x08, %o0
+ stxa %g2, [%o0] ASI_ST_BLKINIT_MRU_P
+ add %o0, 0x08, %o0
+ stxa %g3, [%o0] ASI_ST_BLKINIT_MRU_P
+ add %o0, 0x08, %o0
+ stxa %o2, [%o0] ASI_ST_BLKINIT_MRU_P
+ add %o0, 0x08, %o0
+ bne,pt %icc, 1b
+ prefetch [%o1 + 0x200], #n_reads_strong
+ retl
+ membar #StoreLoad | #StoreStore
+ .size NG4copy_user_page,.-NG4copy_user_page
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