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authorIlya Yanok <yanok@emcraft.com>2008-12-11 04:55:41 +0300
committerPaul Mackerras <paulus@samba.org>2008-12-29 09:53:25 +1100
commitca9153a3a2a7556d091dfe080e42b0e67881fff6 (patch)
tree35b5ce24f190690cf7a726cbb97980da51704855 /arch/powerpc/kernel/misc_32.S
parent6ca4f7494bde078b2b730e28e4ea1dc36a772f70 (diff)
downloadop-kernel-dev-ca9153a3a2a7556d091dfe080e42b0e67881fff6.zip
op-kernel-dev-ca9153a3a2a7556d091dfe080e42b0e67881fff6.tar.gz
powerpc/44x: Support 16K/64K base page sizes on 44x
This adds support for 16k and 64k page sizes on PowerPC 44x processors. The PGDIR table is much smaller than a page when using 16k or 64k pages (512 and 32 bytes respectively) so we allocate the PGDIR with kzalloc() instead of __get_free_pages(). One PTE table covers rather a large memory area when using 16k or 64k pages (32MB or 512MB respectively), so we can easily put FIXMAP and PKMAP in the area covered by one PTE table. Signed-off-by: Yuri Tikhonov <yur@emcraft.com> Signed-off-by: Vladimir Panfilov <pvr@emcraft.com> Signed-off-by: Ilya Yanok <yanok@emcraft.com> Acked-by: Josh Boyer <jwboyer@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel/misc_32.S')
-rw-r--r--arch/powerpc/kernel/misc_32.S12
1 files changed, 6 insertions, 6 deletions
diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S
index ae0d084..15f28e0 100644
--- a/arch/powerpc/kernel/misc_32.S
+++ b/arch/powerpc/kernel/misc_32.S
@@ -426,8 +426,8 @@ _GLOBAL(__flush_dcache_icache)
BEGIN_FTR_SECTION
blr
END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE)
- rlwinm r3,r3,0,0,19 /* Get page base address */
- li r4,4096/L1_CACHE_BYTES /* Number of lines in a page */
+ rlwinm r3,r3,0,0,31-PAGE_SHIFT /* Get page base address */
+ li r4,PAGE_SIZE/L1_CACHE_BYTES /* Number of lines in a page */
mtctr r4
mr r6,r3
0: dcbst 0,r3 /* Write line to ram */
@@ -467,8 +467,8 @@ END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE)
rlwinm r0,r10,0,28,26 /* clear DR */
mtmsr r0
isync
- rlwinm r3,r3,0,0,19 /* Get page base address */
- li r4,4096/L1_CACHE_BYTES /* Number of lines in a page */
+ rlwinm r3,r3,0,0,31-PAGE_SHIFT /* Get page base address */
+ li r4,PAGE_SIZE/L1_CACHE_BYTES /* Number of lines in a page */
mtctr r4
mr r6,r3
0: dcbst 0,r3 /* Write line to ram */
@@ -492,7 +492,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE)
* void clear_pages(void *page, int order) ;
*/
_GLOBAL(clear_pages)
- li r0,4096/L1_CACHE_BYTES
+ li r0,PAGE_SIZE/L1_CACHE_BYTES
slw r0,r0,r4
mtctr r0
#ifdef CONFIG_8xx
@@ -550,7 +550,7 @@ _GLOBAL(copy_page)
dcbt r5,r4
li r11,L1_CACHE_BYTES+4
#endif /* MAX_COPY_PREFETCH */
- li r0,4096/L1_CACHE_BYTES - MAX_COPY_PREFETCH
+ li r0,PAGE_SIZE/L1_CACHE_BYTES - MAX_COPY_PREFETCH
crclr 4*cr0+eq
2:
mtctr r0
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