diff options
| author | David Gibson <david@gibson.dropbear.id.au> | 2007-05-08 12:46:49 +1000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2007-05-08 13:40:31 +1000 |
| commit | d1953c8888ef034b912ee33bc2ea2cce6a414402 (patch) | |
| tree | 525e581603a2dd8622b821304440b6ce14b535ae /arch | |
| parent | 00c2ae35bd50664bcd841becc6efceef8aa5d074 (diff) | |
| download | linux-d1953c8888ef034b912ee33bc2ea2cce6a414402.tar.bz2 | |
[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 <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/lib/dma-noncoherent.c | 4 | ||||
| -rw-r--r-- | arch/powerpc/mm/pgtable_32.c | 28 |
2 files changed, 19 insertions, 13 deletions
diff --git a/arch/powerpc/lib/dma-noncoherent.c b/arch/powerpc/lib/dma-noncoherent.c index 48f3d13a3de5..6656d47841d0 100644 --- a/arch/powerpc/lib/dma-noncoherent.c +++ b/arch/powerpc/lib/dma-noncoherent.c @@ -306,13 +306,15 @@ EXPORT_SYMBOL(__dma_free_coherent); static int __init dma_alloc_init(void) { pgd_t *pgd; + pud_t *pud; pmd_t *pmd; pte_t *pte; int ret = 0; do { pgd = pgd_offset(&init_mm, CONSISTENT_BASE); - pmd = pmd_alloc(&init_mm, pgd, CONSISTENT_BASE); + pud = pud_alloc(&init_mm, pgd, CONSISTENT_BASE); + pmd = pmd_alloc(&init_mm, pud, CONSISTENT_BASE); if (!pmd) { printk(KERN_ERR "%s: no pmd tables\n", __func__); ret = -ENOMEM; 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); } |