diff options
| author | Becky Bruce <becky.bruce@freescale.com> | 2008-09-24 11:01:24 -0500 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2008-09-24 16:29:44 -0500 |
| commit | 4ee7084eb11e00eb02dc8435fd18273a61ffa9bf (patch) | |
| tree | f9f147f0293bc33e2962ac1c1aa5bbcbd9c0edce /arch/powerpc/include/asm/page_32.h | |
| parent | 9a62c05180ff55fdaa517370c6f077402820406c (diff) | |
| download | linux-4ee7084eb11e00eb02dc8435fd18273a61ffa9bf.tar.bz2 | |
POWERPC: Allow 32-bit hashed pgtable code to support 36-bit physical
This rearranges a bit of code, and adds support for
36-bit physical addressing for configs that use a
hashed page table. The 36b physical support is not
enabled by default on any config - it must be
explicitly enabled via the config system.
This patch *only* expands the page table code to accomodate
large physical addresses on 32-bit systems and enables the
PHYS_64BIT config option for 86xx. It does *not*
allow you to boot a board with more than about 3.5GB of
RAM - for that, SWIOTLB support is also required (and
coming soon).
Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include/asm/page_32.h')
| -rw-r--r-- | arch/powerpc/include/asm/page_32.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/page_32.h b/arch/powerpc/include/asm/page_32.h index ebfae530a379..d77072a32cc6 100644 --- a/arch/powerpc/include/asm/page_32.h +++ b/arch/powerpc/include/asm/page_32.h @@ -13,10 +13,16 @@ #define ARCH_KMALLOC_MINALIGN L1_CACHE_BYTES #endif +#ifdef CONFIG_PTE_64BIT +#define PTE_FLAGS_OFFSET 4 /* offset of PTE flags, in bytes */ +#else +#define PTE_FLAGS_OFFSET 0 +#endif + #ifndef __ASSEMBLY__ /* * The basic type of a PTE - 64 bits for those CPUs with > 32 bit - * physical addressing. For now this just the IBM PPC440. + * physical addressing. */ #ifdef CONFIG_PTE_64BIT typedef unsigned long long pte_basic_t; |