aboutsummaryrefslogtreecommitdiffstats
path: root/arch/powerpc/mm/hugetlbpage.c
diff options
context:
space:
mode:
authorJon Tollefson <kniht@linux.vnet.ibm.com>2008-07-24 00:27:54 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-24 13:47:19 -0400
commit658013e93eb70494f7300bc90457b09a807232a4 (patch)
treed03a23ac4fff0b35138b5d8abb761e9fad85b09c /arch/powerpc/mm/hugetlbpage.c
parentec4b2c0c8312d1118c2acd00c89988ecf955d5cc (diff)
powerpc: scan device tree for gigantic pages
The 16G huge pages have to be reserved in the HMC prior to boot. The location of the pages are placed in the device tree. This patch adds code to scan the device tree during very early boot and save these page locations until hugetlbfs is ready for them. Acked-by: Adam Litke <agl@us.ibm.com> Signed-off-by: Jon Tollefson <kniht@linux.vnet.ibm.com> Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/powerpc/mm/hugetlbpage.c')
-rw-r--r--arch/powerpc/mm/hugetlbpage.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c
index 5df82186fc93..e2a650a9e533 100644
--- a/arch/powerpc/mm/hugetlbpage.c
+++ b/arch/powerpc/mm/hugetlbpage.c
@@ -110,6 +110,22 @@ pmd_t *hpmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long addr)
110} 110}
111#endif 111#endif
112 112
113/* Build list of addresses of gigantic pages. This function is used in early
114 * boot before the buddy or bootmem allocator is setup.
115 */
116void add_gpage(unsigned long addr, unsigned long page_size,
117 unsigned long number_of_pages)
118{
119 if (!addr)
120 return;
121 while (number_of_pages > 0) {
122 gpage_freearray[nr_gpages] = addr;
123 nr_gpages++;
124 number_of_pages--;
125 addr += page_size;
126 }
127}
128
113/* Moves the gigantic page addresses from the temporary list to the 129/* Moves the gigantic page addresses from the temporary list to the
114 * huge_boot_pages list. */ 130 * huge_boot_pages list. */
115int alloc_bootmem_huge_page(struct hstate *h) 131int alloc_bootmem_huge_page(struct hstate *h)