diff options
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2005-11-07 11:06:55 +1100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-06 16:56:47 -0800 |
| commit | 3c726f8dee6f55e96475574e9f645327e461884c (patch) | |
| tree | f67c381e8f57959aa4a94bda4c68e24253cd8171 /arch/powerpc/lib | |
| parent | f912696ab330bf539231d1f8032320f2a08b850f (diff) | |
[PATCH] ppc64: support 64k pages
Adds a new CONFIG_PPC_64K_PAGES which, when enabled, changes the kernel
base page size to 64K. The resulting kernel still boots on any
hardware. On current machines with 4K pages support only, the kernel
will maintain 16 "subpages" for each 64K page transparently.
Note that while real 64K capable HW has been tested, the current patch
will not enable it yet as such hardware is not released yet, and I'm
still verifying with the firmware architects the proper to get the
information from the newer hypervisors.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/powerpc/lib')
| -rw-r--r-- | arch/powerpc/lib/copypage_64.S | 2 | ||||
| -rw-r--r-- | arch/powerpc/lib/copyuser_64.S | 4 |
2 files changed, 3 insertions, 3 deletions
diff --git a/arch/powerpc/lib/copypage_64.S b/arch/powerpc/lib/copypage_64.S index 733d61618bb..40523b14010 100644 --- a/arch/powerpc/lib/copypage_64.S +++ b/arch/powerpc/lib/copypage_64.S @@ -11,7 +11,7 @@ #include <asm/processor.h> #include <asm/ppc_asm.h> -_GLOBAL(copy_page) +_GLOBAL(copy_4K_page) std r31,-8(1) std r30,-16(1) std r29,-24(1) diff --git a/arch/powerpc/lib/copyuser_64.S b/arch/powerpc/lib/copyuser_64.S index a0b3fbbd6fb..6d69ef39b7d 100644 --- a/arch/powerpc/lib/copyuser_64.S +++ b/arch/powerpc/lib/copyuser_64.S @@ -24,7 +24,7 @@ _GLOBAL(__copy_tofrom_user) std r4,-16(r1) std r5,-8(r1) dcbt 0,r4 - beq .Lcopy_page + beq .Lcopy_page_4K andi. r6,r6,7 mtcrf 0x01,r5 blt cr1,.Lshort_copy @@ -366,7 +366,7 @@ _GLOBAL(__copy_tofrom_user) * above (following the .Ldst_aligned label) but it runs slightly * slower on POWER3. */ -.Lcopy_page: +.Lcopy_page_4K: std r31,-32(1) std r30,-40(1) std r29,-48(1) |