diff options
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/mm/hugetlbpage.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c index 63db7adce717..5df82186fc93 100644 --- a/arch/powerpc/mm/hugetlbpage.c +++ b/arch/powerpc/mm/hugetlbpage.c @@ -29,6 +29,12 @@ #define NUM_LOW_AREAS (0x100000000UL >> SID_SHIFT) #define NUM_HIGH_AREAS (PGTABLE_RANGE >> HTLB_AREA_SHIFT) +#define MAX_NUMBER_GPAGES 1024 + +/* Tracks the 16G pages after the device tree is scanned and before the + * huge_boot_pages list is ready. */ +static unsigned long gpage_freearray[MAX_NUMBER_GPAGES]; +static unsigned nr_gpages; unsigned int hugepte_shift; #define PTRS_PER_HUGEPTE (1 << hugepte_shift) @@ -104,6 +110,21 @@ pmd_t *hpmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long addr) } #endif +/* Moves the gigantic page addresses from the temporary list to the + * huge_boot_pages list. */ +int alloc_bootmem_huge_page(struct hstate *h) +{ + struct huge_bootmem_page *m; + if (nr_gpages == 0) + return 0; + m = phys_to_virt(gpage_freearray[--nr_gpages]); + gpage_freearray[nr_gpages] = 0; + list_add(&m->list, &huge_boot_pages); + m->hstate = h; + return 1; +} + + /* Modelled after find_linux_pte() */ pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr) { |