From d1953c8888ef034b912ee33bc2ea2cce6a414402 Mon Sep 17 00:00:00 2001 From: David Gibson Date: Tue, 8 May 2007 12:46:49 +1000 Subject: [POWERPC] Remove use of 4level-fixup.h for ppc32 For 32-bit systems, powerpc still relies on the 4level-fixup.h hack, to pretend that the generic pagetable handling stuff is 3-levels rather than 4. This patch removes this, instead using the newer pgtable-nopmd.h to handle the elision of both the pud and pmd pagetable levels (ppc32 pagetables are actually 2 levels). This removes a little extraneous code, and makes it more easily compared to the 64-bit pagetable code. Signed-off-by: David Gibson Signed-off-by: Paul Mackerras --- arch/powerpc/mm/pgtable_32.c | 28 ++++++++++++++++------------ 1 file changed, 16 insertions(+), 12 deletions(-) (limited to 'arch/powerpc/mm/pgtable_32.c') diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c index bca560374927..d8232b7a08f7 100644 --- a/arch/powerpc/mm/pgtable_32.c +++ b/arch/powerpc/mm/pgtable_32.c @@ -261,7 +261,7 @@ int map_page(unsigned long va, phys_addr_t pa, int flags) int err = -ENOMEM; /* Use upper 10 bits of VA to index the first level map */ - pd = pmd_offset(pgd_offset_k(va), va); + pd = pmd_offset(pud_offset(pgd_offset_k(va), va), va); /* Use middle 10 bits of VA to index the second-level map */ pg = pte_alloc_kernel(pd, va); if (pg != 0) { @@ -354,23 +354,27 @@ int get_pteptr(struct mm_struct *mm, unsigned long addr, pte_t **ptep, pmd_t **pmdp) { pgd_t *pgd; + pud_t *pud; pmd_t *pmd; pte_t *pte; int retval = 0; pgd = pgd_offset(mm, addr & PAGE_MASK); if (pgd) { - pmd = pmd_offset(pgd, addr & PAGE_MASK); - if (pmd_present(*pmd)) { - pte = pte_offset_map(pmd, addr & PAGE_MASK); - if (pte) { - retval = 1; - *ptep = pte; - if (pmdp) - *pmdp = pmd; - /* XXX caller needs to do pte_unmap, yuck */ - } - } + pud = pud_offset(pgd, addr & PAGE_MASK); + if (pud && pud_present(*pud)) { + pmd = pmd_offset(pud, addr & PAGE_MASK); + if (pmd_present(*pmd)) { + pte = pte_offset_map(pmd, addr & PAGE_MASK); + if (pte) { + retval = 1; + *ptep = pte; + if (pmdp) + *pmdp = pmd; + /* XXX caller needs to do pte_unmap, yuck */ + } + } + } } return(retval); } -- cgit v1.2.3