samsung_sm8750/android_kernel_samsung_sm8750
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

MIPS: Two-level pagetables for 64-bit kernels with 64KB pages.

Browse Source 
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 <ddaney@caviumnetworks.com>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/761/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
David Daney
2009-12-04 13:52:36 -08:00
committed by Ralf Baechle
parent ef6c1fd662
commit 325f8a0a31
8 changed files with 71 additions and 35 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
arch/mips/include/asm/pgtable.h
View File

@@ -177,7 +177,7 @@ static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *pt
*/
#define set_pmd(pmdptr, pmdval) do { *(pmdptr) = (pmdval); } while(0)
#ifdef CONFIG_64BIT
#ifndef __PAGETABLE_PMD_FOLDED
/*
* (puds are folded into pgds so this doesn't get actually called,
* but the define is needed for a generic inline function.)