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authorBecky Bruce <becky.bruce@freescale.com>2008-09-24 11:01:24 -0500
committerKumar Gala <galak@kernel.crashing.org>2008-09-24 16:29:44 -0500
commit4ee7084eb11e00eb02dc8435fd18273a61ffa9bf (patch)
treef9f147f0293bc33e2962ac1c1aa5bbcbd9c0edce /arch/powerpc/include/asm/page_32.h
parent9a62c05180ff55fdaa517370c6f077402820406c (diff)
downloadlinux-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.h8
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;