From 41151e77a4d96ea138cede6d84c955aa4769ce74 Mon Sep 17 00:00:00 2001 From: Becky Bruce Date: Tue, 28 Jun 2011 09:54:48 +0000 Subject: powerpc: Hugetlb for BookE Enable hugepages on Freescale BookE processors. This allows the kernel to use huge TLB entries to map pages, which can greatly reduce the number of TLB misses and the amount of TLB thrashing experienced by applications with large memory footprints. Care should be taken when using this on FSL processors, as the number of large TLB entries supported by the core is low (16-64) on current processors. The supported set of hugepage sizes include 4m, 16m, 64m, 256m, and 1g. Page sizes larger than the max zone size are called "gigantic" pages and must be allocated on the command line (and cannot be deallocated). This is currently only fully implemented for Freescale 32-bit BookE processors, but there is some infrastructure in the code for 64-bit BooKE. Signed-off-by: Becky Bruce Signed-off-by: David Gibson Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/include/asm/mmu-hash64.h | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'arch/powerpc/include/asm/mmu-hash64.h') diff --git a/arch/powerpc/include/asm/mmu-hash64.h b/arch/powerpc/include/asm/mmu-hash64.h index b445e0a..db645ec 100644 --- a/arch/powerpc/include/asm/mmu-hash64.h +++ b/arch/powerpc/include/asm/mmu-hash64.h @@ -262,8 +262,7 @@ extern void hash_failure_debug(unsigned long ea, unsigned long access, extern int htab_bolt_mapping(unsigned long vstart, unsigned long vend, unsigned long pstart, unsigned long prot, int psize, int ssize); -extern void add_gpage(unsigned long addr, unsigned long page_size, - unsigned long number_of_pages); +extern void add_gpage(u64 addr, u64 page_size, unsigned long number_of_pages); extern void demote_segment_4k(struct mm_struct *mm, unsigned long addr); extern void hpte_init_native(void); -- cgit v1.1