From: Benjamin Herrenschmidt <b...@kernel.crashing.org>
In a number of places we called "cache line size" what is actually
the cache block size, which in the powerpc architecture, means the
effective size to use with cache management instructions (it can
be different from the actual cache line size).
We fix the naming across the board and properly retrieve both
pieces of information when available in the device-tree.
Signed-off-by: Benjamin Herrenschmidt <b...@kernel.crashing.org>
Signed-off-by: Michael Ellerman <m...@ellerman.id.au>
---
arch/powerpc/include/asm/cache.h | 12 ++++---
arch/powerpc/include/asm/page_64.h | 4 +--
arch/powerpc/kernel/align.c | 2 +-
arch/powerpc/kernel/asm-offsets.c | 12 +++----
arch/powerpc/kernel/misc_64.S | 28 ++++++++--------
arch/powerpc/kernel/setup_64.c | 65 +++++++++++++++++++++-----------------
arch/powerpc/kernel/vdso.c | 10 +++---
arch/powerpc/lib/copypage_64.S | 4 +--
arch/powerpc/lib/string_64.S | 6 ++--
9 files changed, 75 insertions(+), 68 deletions(-)
diff --git a/arch/powerpc/include/asm/cache.h b/arch/powerpc/include/asm/cache.h
index 7657aa897a38..25ee433a8261 100644
--- a/arch/powerpc/include/asm/cache.h
+++ b/arch/powerpc/include/asm/cache.h
@@ -33,12 +33,14 @@
struct ppc64_caches {
u32 dsize; /* L1 d-cache size */
u32 dline_size; /* L1 d-cache line size */
- u32 log_dline_size;
- u32 dlines_per_page;
+ u32 dblock_size; /* L1 d-cache block size */
+ u32 log_dblock_size;
+ u32 dblocks_per_page;
u32 isize; /* L1 i-cache size */
- u32 iline_size; /* L1 i-cache line size */
- u32 log_iline_size;
- u32 ilines_per_page;
+ u32 iline_size; /* L1 d-cache line size */
+ u32 iblock_size; /* L1 i-cache block size */
+ u32 log_iblock_size;
+ u32 iblocks_per_page;
};
extern struct ppc64_caches ppc64_caches;
diff --git a/arch/powerpc/include/asm/page_64.h
b/arch/powerpc/include/asm/page_64.h
index dd5f0712afa2..c50a666308dd 100644
--- a/arch/powerpc/include/asm/page_64.h
+++ b/arch/powerpc/include/asm/page_64.h
@@ -47,14 +47,14 @@ static inline void clear_page(void *addr)
unsigned long iterations;
unsigned long onex, twox, fourx, eightx;
- iterations = ppc64_caches.dlines_per_page / 8;
+ iterations = ppc64_caches.dblocks_per_page / 8;
/*
* Some verisions of gcc use multiply instructions to
* calculate the offsets so lets give it a hand to
* do better.
*/
- onex = ppc64_caches.dline_size;
+ onex = ppc64_caches.dblock_size;
twox = onex << 1;
fourx = onex << 2;
eightx = onex << 3;
diff --git a/arch/powerpc/kernel/align.c b/arch/powerpc/kernel/align.c
index 8d58c61908f7..30ff6590a2dd 100644
--- a/arch/powerpc/kernel/align.c
+++ b/arch/powerpc/kernel/align.c
@@ -204,7 +204,7 @@ static int emulate_dcbz(struct pt_regs *regs, unsigned char
__user *addr)
int i, size;
#ifdef __powerpc64__
- size = ppc64_caches.dline_size;
+ size = ppc64_caches.dblock_size;
#else
size = L1_CACHE_BYTES;
#endif
diff --git a/arch/powerpc/kernel/asm-offsets.c
b/arch/powerpc/kernel/asm-offsets.c
index 0601e6a7297c..125442107b40 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -163,12 +163,12 @@ int main(void)
DEFINE(TI_CPU, offsetof(struct thread_info, cpu));
#ifdef CONFIG_PPC64
- DEFINE(DCACHEL1LINESIZE, offsetof(struct ppc64_caches, dline_size));
- DEFINE(DCACHEL1LOGLINESIZE, offsetof(struct ppc64_caches,
log_dline_size));
- DEFINE(DCACHEL1LINESPERPAGE, offsetof(struct ppc64_caches,
dlines_per_page));
- DEFINE(ICACHEL1LINESIZE, offsetof(struct ppc64_caches, iline_size));
- DEFINE(ICACHEL1LOGLINESIZE, offsetof(struct ppc64_caches,
log_iline_size));
- DEFINE(ICACHEL1LINESPERPAGE, offsetof(struct ppc64_caches,
ilines_per_page));
+ DEFINE(DCACHEL1BLOCKSIZE, offsetof(struct ppc64_caches, dblock_size));
+ DEFINE(DCACHEL1LOGBLOCKSIZE, offsetof(struct ppc64_caches,
log_dblock_size));
+ DEFINE(DCACHEL1BLOCKSPERPAGE, offsetof(struct ppc64_caches,
dblocks_per_page));
+ DEFINE(ICACHEL1BLOCKSIZE, offsetof(struct ppc64_caches, iblock_size));
+ DEFINE(ICACHEL1LOGBLOCKSIZE, offsetof(struct ppc64_caches,
log_iblock_size));
+ DEFINE(ICACHEL1BLOCKSPERPAGE, offsetof(struct ppc64_caches,
iblocks_per_page));
/* paca */
DEFINE(PACA_SIZE, sizeof(struct paca_struct));
DEFINE(PACAPACAINDEX, offsetof(struct paca_struct, paca_index));
diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S
index 32be2a844947..ae179cb1bb3c 100644
--- a/arch/powerpc/kernel/misc_64.S
+++ b/arch/powerpc/kernel/misc_64.S
@@ -80,12 +80,12 @@ END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE)
* each other.
*/
ld r10,PPC64_CACHES@toc(r2)
- lwz r7,DCACHEL1LINESIZE(r10)/* Get cache line size */
+ lwz r7,DCACHEL1BLOCKSIZE(r10)/* Get cache block size */
addi r5,r7,-1
andc r6,r3,r5 /* round low to line bdy */
subf r8,r6,r4 /* compute length */
add r8,r8,r5 /* ensure we get enough */
- lwz r9,DCACHEL1LOGLINESIZE(r10) /* Get log-2 of cache line size
*/
+ lwz r9,DCACHEL1LOGBLOCKSIZE(r10) /* Get log-2 of cache block
size */
srw. r8,r8,r9 /* compute line count */
beqlr /* nothing to do? */
mtctr r8
@@ -96,12 +96,12 @@ END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE)
/* Now invalidate the instruction cache */
- lwz r7,ICACHEL1LINESIZE(r10) /* Get Icache line size */
+ lwz r7,ICACHEL1BLOCKSIZE(r10) /* Get Icache block size */
addi r5,r7,-1
andc r6,r3,r5 /* round low to line bdy */
subf r8,r6,r4 /* compute length */
add r8,r8,r5
- lwz r9,ICACHEL1LOGLINESIZE(r10) /* Get log-2 of Icache line
size */
+ lwz r9,ICACHEL1LOGBLOCKSIZE(r10) /* Get log-2 of Icache block
size */
srw. r8,r8,r9 /* compute line count */
beqlr /* nothing to do? */
mtctr r8
@@ -128,12 +128,12 @@ _GLOBAL(flush_dcache_range)
* Different systems have different cache line sizes
*/
ld r10,PPC64_CACHES@toc(r2)
- lwz r7,DCACHEL1LINESIZE(r10) /* Get dcache line size */
+ lwz r7,DCACHEL1BLOCKSIZE(r10) /* Get dcache block size */
addi r5,r7,-1
andc r6,r3,r5 /* round low to line bdy */
subf r8,r6,r4 /* compute length */
add r8,r8,r5 /* ensure we get enough */
- lwz r9,DCACHEL1LOGLINESIZE(r10) /* Get log-2 of dcache line
size */
+ lwz r9,DCACHEL1LOGBLOCKSIZE(r10) /* Get log-2 of dcache block
size */
srw. r8,r8,r9 /* compute line count */
beqlr /* nothing to do? */
mtctr r8
@@ -156,12 +156,12 @@ EXPORT_SYMBOL(flush_dcache_range)
*/
_GLOBAL(flush_dcache_phys_range)
ld r10,PPC64_CACHES@toc(r2)
- lwz r7,DCACHEL1LINESIZE(r10) /* Get dcache line size */
+ lwz r7,DCACHEL1BLOCKSIZE(r10) /* Get dcache block size */
addi r5,r7,-1
andc r6,r3,r5 /* round low to line bdy */
subf r8,r6,r4 /* compute length */
add r8,r8,r5 /* ensure we get enough */
- lwz r9,DCACHEL1LOGLINESIZE(r10) /* Get log-2 of dcache line
size */
+ lwz r9,DCACHEL1LOGBLOCKSIZE(r10) /* Get log-2 of dcache block
size */
srw. r8,r8,r9 /* compute line count */
beqlr /* nothing to do? */
mfmsr r5 /* Disable MMU Data Relocation */
@@ -184,12 +184,12 @@ _GLOBAL(flush_dcache_phys_range)
_GLOBAL(flush_inval_dcache_range)
ld r10,PPC64_CACHES@toc(r2)
- lwz r7,DCACHEL1LINESIZE(r10) /* Get dcache line size */
+ lwz r7,DCACHEL1BLOCKSIZE(r10) /* Get dcache block size */
addi r5,r7,-1
andc r6,r3,r5 /* round low to line bdy */
subf r8,r6,r4 /* compute length */
add r8,r8,r5 /* ensure we get enough */
- lwz r9,DCACHEL1LOGLINESIZE(r10)/* Get log-2 of dcache line size */
+ lwz r9,DCACHEL1LOGBLOCKSIZE(r10)/* Get log-2 of dcache block size */
srw. r8,r8,r9 /* compute line count */
beqlr /* nothing to do? */
sync
@@ -225,8 +225,8 @@ END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE)
/* Flush the dcache */
ld r7,PPC64_CACHES@toc(r2)
clrrdi r3,r3,PAGE_SHIFT /* Page align */
- lwz r4,DCACHEL1LINESPERPAGE(r7) /* Get # dcache lines per page
*/
- lwz r5,DCACHEL1LINESIZE(r7) /* Get dcache line size */
+ lwz r4,DCACHEL1BLOCKSPERPAGE(r7) /* Get # dcache blocks per page
*/
+ lwz r5,DCACHEL1BLOCKSIZE(r7) /* Get dcache block size */
mr r6,r3
mtctr r4
0: dcbst 0,r6
@@ -236,8 +236,8 @@ END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE)
/* Now invalidate the icache */
- lwz r4,ICACHEL1LINESPERPAGE(r7) /* Get # icache lines per page
*/
- lwz r5,ICACHEL1LINESIZE(r7) /* Get icache line size */
+ lwz r4,ICACHEL1BLOCKSPERPAGE(r7) /* Get # icache blocks per page
*/
+ lwz r5,ICACHEL1BLOCKSIZE(r7) /* Get icache block size */
mtctr r4
1: icbi 0,r3
add r3,r3,r5
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index ae84d345c13c..08cccb2501e7 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -78,10 +78,10 @@ int spinning_secondaries;
u64 ppc64_pft_size;
struct ppc64_caches ppc64_caches = {
- .dline_size = 0x40,
- .log_dline_size = 6,
- .iline_size = 0x40,
- .log_iline_size = 6
+ .dblock_size = 0x40,
+ .log_dblock_size = 6,
+ .iblock_size = 0x40,
+ .log_iblock_size = 6
};
EXPORT_SYMBOL_GPL(ppc64_caches);
@@ -412,59 +412,66 @@ void __init initialize_cache_info(void)
* d-cache and i-cache sizes... -Peter
*/
if (num_cpus == 1) {
- const __be32 *sizep, *lsizep;
- u32 size, lsize;
+ const __be32 *sizep, *lsizep, *bsizep;
+ u32 size, lsize, bsize;
size = 0;
- lsize = cur_cpu_spec->dcache_bsize;
+ lsize = bsize = cur_cpu_spec->dcache_bsize;
sizep = of_get_property(np, "d-cache-size", NULL);
if (sizep != NULL)
size = be32_to_cpu(*sizep);
- lsizep = of_get_property(np, "d-cache-block-size",
+ bsizep = of_get_property(np, "d-cache-block-size",
NULL);
- /* fallback if block size missing */
- if (lsizep == NULL)
- lsizep = of_get_property(np,
- "d-cache-line-size",
- NULL);
+ lsizep = of_get_property(np, "d-cache-line-size",
+ NULL);
+ if (bsizep == NULL)
+ bsizep = lsizep;
if (lsizep != NULL)
lsize = be32_to_cpu(*lsizep);
- if (sizep == NULL || lsizep == NULL)
+ if (bsizep != NULL)
+ bsize = be32_to_cpu(*bsizep);
+ if (sizep == NULL || bsizep == NULL || lsizep == NULL)
DBG("Argh, can't find dcache properties ! "
- "sizep: %p, lsizep: %p\n", sizep, lsizep);
+ "sizep: %p, bsizep: %p, lsizep: %p\n",
+ sizep, bsizep, lsizep);
ppc64_caches.dsize = size;
ppc64_caches.dline_size = lsize;
- ppc64_caches.log_dline_size = __ilog2(lsize);
- ppc64_caches.dlines_per_page = PAGE_SIZE / lsize;
+ ppc64_caches.dblock_size = bsize;
+ ppc64_caches.log_dblock_size = __ilog2(bsize);
+ ppc64_caches.dblocks_per_page = PAGE_SIZE / bsize;
size = 0;
- lsize = cur_cpu_spec->icache_bsize;
+ lsize = bsize = cur_cpu_spec->icache_bsize;
sizep = of_get_property(np, "i-cache-size", NULL);
if (sizep != NULL)
size = be32_to_cpu(*sizep);
- lsizep = of_get_property(np, "i-cache-block-size",
+ bsizep = of_get_property(np, "i-cache-block-size",
+ NULL);
+ lsizep = of_get_property(np, "i-cache-line-size",
NULL);
- if (lsizep == NULL)
- lsizep = of_get_property(np,
- "i-cache-line-size",
- NULL);
+ if (bsizep == NULL)
+ bsizep = lsizep;
if (lsizep != NULL)
lsize = be32_to_cpu(*lsizep);
- if (sizep == NULL || lsizep == NULL)
+ if (bsizep != NULL)
+ bsize = be32_to_cpu(*bsizep);
+ if (sizep == NULL || bsizep == NULL || lsizep == NULL)
DBG("Argh, can't find icache properties ! "
- "sizep: %p, lsizep: %p\n", sizep, lsizep);
+ "sizep: %p, bsizep: %p, lsizep: %p\n",
+ sizep, bsizep, lsizep);
ppc64_caches.isize = size;
ppc64_caches.iline_size = lsize;
- ppc64_caches.log_iline_size = __ilog2(lsize);
- ppc64_caches.ilines_per_page = PAGE_SIZE / lsize;
+ ppc64_caches.iblock_size = bsize;
+ ppc64_caches.log_iblock_size = __ilog2(bsize);
+ ppc64_caches.iblocks_per_page = PAGE_SIZE / bsize;
}
}
/* For use by binfmt_elf */
- dcache_bsize = ppc64_caches.dline_size;
- icache_bsize = ppc64_caches.iline_size;
+ dcache_bsize = ppc64_caches.dblock_size;
+ icache_bsize = ppc64_caches.iblock_size;
DBG(" <- initialize_cache_info()\n");
}
diff --git a/arch/powerpc/kernel/vdso.c b/arch/powerpc/kernel/vdso.c
index 4111d30badfa..9c0a85776c6c 100644
--- a/arch/powerpc/kernel/vdso.c
+++ b/arch/powerpc/kernel/vdso.c
@@ -740,12 +740,10 @@ static int __init vdso_init(void)
vdso_data->dcache_line_size = ppc64_caches.dline_size;
vdso_data->icache_size = ppc64_caches.isize;
vdso_data->icache_line_size = ppc64_caches.iline_size;
-
- /* XXXOJN: Blocks should be added to ppc64_caches and used instead */
- vdso_data->dcache_block_size = ppc64_caches.dline_size;
- vdso_data->icache_block_size = ppc64_caches.iline_size;
- vdso_data->dcache_log_block_size = ppc64_caches.log_dline_size;
- vdso_data->icache_log_block_size = ppc64_caches.log_iline_size;
+ vdso_data->dcache_block_size = ppc64_caches.dblock_size;
+ vdso_data->icache_block_size = ppc64_caches.iblock_size;
+ vdso_data->dcache_log_block_size = ppc64_caches.log_dblock_size;
+ vdso_data->icache_log_block_size = ppc64_caches.log_iblock_size;
/*
* Calculate the size of the 64 bits vDSO
diff --git a/arch/powerpc/lib/copypage_64.S b/arch/powerpc/lib/copypage_64.S
index 21367b3a8146..4bcc9e76fb55 100644
--- a/arch/powerpc/lib/copypage_64.S
+++ b/arch/powerpc/lib/copypage_64.S
@@ -26,8 +26,8 @@ ALT_FTR_SECTION_END_IFCLR(CPU_FTR_VMX_COPY)
ori r5,r5,PAGE_SIZE@l
BEGIN_FTR_SECTION
ld r10,PPC64_CACHES@toc(r2)
- lwz r11,DCACHEL1LOGLINESIZE(r10) /* log2 of cache line size */
- lwz r12,DCACHEL1LINESIZE(r10) /* get cache line size */
+ lwz r11,DCACHEL1LOGBLOCKSIZE(r10) /* log2 of cache block size */
+ lwz r12,DCACHEL1BLOCKSIZE(r10) /* get cache block size */
li r9,0
srd r8,r5,r11
diff --git a/arch/powerpc/lib/string_64.S b/arch/powerpc/lib/string_64.S
index c100f4d5d5d0..d5b4d9498c54 100644
--- a/arch/powerpc/lib/string_64.S
+++ b/arch/powerpc/lib/string_64.S
@@ -152,9 +152,9 @@ err2; std r0,0(r3)
addi r3,r3,8
addi r4,r4,-8
- /* Destination is 16 byte aligned, need to get it cacheline aligned */
-11: lwz r7,DCACHEL1LOGLINESIZE(r5)
- lwz r9,DCACHEL1LINESIZE(r5)
+ /* Destination is 16 byte aligned, need to get it cache block aligned */
+11: lwz r7,DCACHEL1LOGBLOCKSIZE(r5)
+ lwz r9,DCACHEL1BLOCKSIZE(r5)
/*
* With worst case alignment the long clear loop takes a minimum
--
2.7.4
