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powerpc/8xx: Start using dcbX instructions in various copy routines

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Now that 8xx can fixup dcbX instructions, start using them
where possible like every other PowerPc arch do.

Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Joakim Tjernlund 2009-11-20 00:21:09 +00:00 committed by Benjamin Herrenschmidt
parent 0c4661698c
commit 15d914d72a
2 changed files with 0 additions and 42 deletions
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18
arch/powerpc/kernel/misc_32.S
View file

@ -502,15 +502,7 @@ _GLOBAL(clear_pages)
li r0,PAGE_SIZE/L1_CACHE_BYTES
slw r0,r0,r4
mtctr r0
#ifdef CONFIG_8xx
li r4, 0
1: stw r4, 0(r3)
stw r4, 4(r3)
stw r4, 8(r3)
stw r4, 12(r3)
#else
1: dcbz 0,r3
#endif
addi r3,r3,L1_CACHE_BYTES
bdnz 1b
blr
@ -535,15 +527,6 @@ _GLOBAL(copy_page)
addi r3,r3,-4
addi r4,r4,-4
#ifdef CONFIG_8xx
/* don't use prefetch on 8xx */
li r0,4096/L1_CACHE_BYTES
mtctr r0
1: COPY_16_BYTES
bdnz 1b
blr
#else /* not 8xx, we can prefetch */
li r5,4
#if MAX_COPY_PREFETCH > 1
@ -584,7 +567,6 @@ _GLOBAL(copy_page)
li r0,MAX_COPY_PREFETCH
li r11,4
b 2b
#endif /* CONFIG_8xx */
/*
* void atomic_clear_mask(atomic_t mask, atomic_t *addr)

24
arch/powerpc/lib/copy_32.S
View file

@ -98,20 +98,7 @@ _GLOBAL(cacheable_memzero)
bdnz 4b
3: mtctr r9
li r7,4
#if !defined(CONFIG_8xx)
10: dcbz r7,r6
#else
10: stw r4, 4(r6)
stw r4, 8(r6)
stw r4, 12(r6)
stw r4, 16(r6)
#if CACHE_LINE_SIZE >= 32
stw r4, 20(r6)
stw r4, 24(r6)
stw r4, 28(r6)
stw r4, 32(r6)
#endif /* CACHE_LINE_SIZE */
#endif
addi r6,r6,CACHELINE_BYTES
bdnz 10b
clrlwi r5,r8,32-LG_CACHELINE_BYTES
@ -200,9 +187,7 @@ _GLOBAL(cacheable_memcpy)
mtctr r0
beq 63f
53:
#if !defined(CONFIG_8xx)
dcbz r11,r6
#endif
COPY_16_BYTES
#if L1_CACHE_BYTES >= 32
COPY_16_BYTES
@ -356,14 +341,6 @@ _GLOBAL(__copy_tofrom_user)
li r11,4
beq 63f
#ifdef CONFIG_8xx
/* Don't use prefetch on 8xx */
mtctr r0
li r0,0
53: COPY_16_BYTES_WITHEX(0)
bdnz 53b
#else /* not CONFIG_8xx */
/* Here we decide how far ahead to prefetch the source */
li r3,4
cmpwi r0,1
@ -416,7 +393,6 @@ _GLOBAL(__copy_tofrom_user)
li r3,4
li r7,0
bne 114b
#endif /* CONFIG_8xx */
63: srwi. r0,r5,2
mtctr r0