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[/] [or1k/] [tags/] [LINUX_2_4_26_OR32/] [linux/] [linux-2.4/] [include/] [asm-arm/] [proc-armv/] [pgalloc.h] - Rev 1276
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/* * linux/include/asm-arm/proc-armv/pgalloc.h * * Copyright (C) 2001 Russell King * * Page table allocation/freeing primitives for 32-bit ARM processors. */ /* unfortunately, this includes linux/mm.h and the rest of the universe. */ #include <linux/slab.h> extern kmem_cache_t *pte_cache; /* * Allocate one PTE table. * * Note that we keep the processor copy of the PTE entries separate * from the Linux copy. The processor copies are offset by -PTRS_PER_PTE * words from the Linux copy. */ static inline pte_t *pte_alloc_one(struct mm_struct *mm, unsigned long address) { pte_t *pte; pte = kmem_cache_alloc(pte_cache, GFP_KERNEL); if (pte) pte += PTRS_PER_PTE; return pte; } /* * Free one PTE table. */ static inline void pte_free_slow(pte_t *pte) { if (pte) { pte -= PTRS_PER_PTE; kmem_cache_free(pte_cache, pte); } } /* * Populate the pmdp entry with a pointer to the pte. This pmd is part * of the mm address space. * * If 'mm' is the init tasks mm, then we are doing a vmalloc, and we * need to set stuff up correctly for it. */ #define pmd_populate(mm,pmdp,pte) \ do { \ unsigned long __prot; \ if (mm == &init_mm) \ __prot = _PAGE_KERNEL_TABLE; \ else \ __prot = _PAGE_USER_TABLE; \ set_pmd(pmdp, __mk_pmd(pte, __prot)); \ } while (0)
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