From 325f8a0a31df567dbafafc48f8e60f3c1f101a46 Mon Sep 17 00:00:00 2001 From: David Daney Date: Fri, 4 Dec 2009 13:52:36 -0800 Subject: MIPS: Two-level pagetables for 64-bit kernels with 64KB pages. For 64-bit kernels with 64KB pages and two level page tables, there are 42 bits worth of virtual address space This is larger than the 40 bits of virtual address space obtained with the default 4KB Page size and three levels, so there are no draw backs for using two level tables with this configuration. Signed-off-by: David Daney Cc: linux-mips@linux-mips.org Patchwork: http://patchwork.linux-mips.org/patch/761/ Signed-off-by: Ralf Baechle --- arch/mips/kernel/asm-offsets.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'arch/mips/kernel/asm-offsets.c') diff --git a/arch/mips/kernel/asm-offsets.c b/arch/mips/kernel/asm-offsets.c index 2c1e1d02338b..ca6c83218caa 100644 --- a/arch/mips/kernel/asm-offsets.c +++ b/arch/mips/kernel/asm-offsets.c @@ -188,11 +188,15 @@ void output_mm_defines(void) DEFINE(_PTE_T_SIZE, sizeof(pte_t)); BLANK(); DEFINE(_PGD_T_LOG2, PGD_T_LOG2); +#ifndef __PAGETABLE_PMD_FOLDED DEFINE(_PMD_T_LOG2, PMD_T_LOG2); +#endif DEFINE(_PTE_T_LOG2, PTE_T_LOG2); BLANK(); DEFINE(_PGD_ORDER, PGD_ORDER); +#ifndef __PAGETABLE_PMD_FOLDED DEFINE(_PMD_ORDER, PMD_ORDER); +#endif DEFINE(_PTE_ORDER, PTE_ORDER); BLANK(); DEFINE(_PMD_SHIFT, PMD_SHIFT); -- cgit v1.2.3-58-ga151