2007-04-30 14:30:56 +08:00
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#ifndef _ASM_POWERPC_PGALLOC_32_H
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#define _ASM_POWERPC_PGALLOC_32_H
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#include <linux/threads.h>
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2009-10-29 00:27:18 +08:00
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/* For 32-bit, all levels of page tables are just drawn from get_free_page() */
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#define MAX_PGTABLE_INDEX_SIZE 0
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2008-11-19 20:50:04 +08:00
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2007-04-30 14:30:56 +08:00
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extern void __bad_pte(pmd_t *pmd);
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extern pgd_t *pgd_alloc(struct mm_struct *mm);
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2008-02-05 14:29:14 +08:00
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extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
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2007-04-30 14:30:56 +08:00
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/*
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* We don't have any real pmd's, and this code never triggers because
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* the pgd will always be present..
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*/
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2007-05-08 10:46:49 +08:00
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/* #define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); }) */
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2008-02-05 14:29:14 +08:00
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#define pmd_free(mm, x) do { } while (0)
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mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()
mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()
Upcoming paches to support the new 64-bit "BookE" powerpc architecture
will need to have the virtual address corresponding to PTE page when
freeing it, due to the way the HW table walker works.
Basically, the TLB can be loaded with "large" pages that cover the whole
virtual space (well, sort-of, half of it actually) represented by a PTE
page, and which contain an "indirect" bit indicating that this TLB entry
RPN points to an array of PTEs from which the TLB can then create direct
entries. Thus, in order to invalidate those when PTE pages are deleted,
we need the virtual address to pass to tlbilx or tlbivax instructions.
The old trick of sticking it somewhere in the PTE page struct page sucks
too much, the address is almost readily available in all call sites and
almost everybody implemets these as macros, so we may as well add the
argument everywhere. I added it to the pmd and pud variants for consistency.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: David Howells <dhowells@redhat.com> [MN10300 & FRV]
Acked-by: Nick Piggin <npiggin@suse.de>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> [s390]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-07-22 13:44:28 +08:00
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#define __pmd_free_tlb(tlb,x,a) do { } while (0)
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2007-05-08 10:46:49 +08:00
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/* #define pgd_populate(mm, pmd, pte) BUG() */
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2007-04-30 14:30:56 +08:00
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#ifndef CONFIG_BOOKE
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#define pmd_populate_kernel(mm, pmd, pte) \
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(pmd_val(*(pmd)) = __pa(pte) | _PMD_PRESENT)
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#define pmd_populate(mm, pmd, pte) \
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(pmd_val(*(pmd)) = (page_to_pfn(pte) << PAGE_SHIFT) | _PMD_PRESENT)
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2008-02-08 20:22:04 +08:00
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#define pmd_pgtable(pmd) pmd_page(pmd)
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2007-04-30 14:30:56 +08:00
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#else
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#define pmd_populate_kernel(mm, pmd, pte) \
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(pmd_val(*(pmd)) = (unsigned long)pte | _PMD_PRESENT)
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#define pmd_populate(mm, pmd, pte) \
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(pmd_val(*(pmd)) = (unsigned long)lowmem_page_address(pte) | _PMD_PRESENT)
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2008-02-08 20:22:04 +08:00
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#define pmd_pgtable(pmd) pmd_page(pmd)
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2007-04-30 14:30:56 +08:00
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#endif
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extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr);
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2008-02-08 20:22:04 +08:00
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extern pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr);
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2007-04-30 14:30:56 +08:00
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2009-10-29 00:27:18 +08:00
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static inline void pgtable_free(void *table, unsigned index_size)
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2008-11-19 20:50:04 +08:00
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{
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2009-10-29 00:27:18 +08:00
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BUG_ON(index_size); /* 32-bit doesn't use this */
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free_page((unsigned long)table);
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2008-11-19 20:50:04 +08:00
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}
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2007-04-30 14:30:56 +08:00
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#define check_pgt_cache() do { } while (0)
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#endif /* _ASM_POWERPC_PGALLOC_32_H */
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