/* sun3_pgalloc.h -- * reorganization around 2.3.39, routines moved from sun3_pgtable.h * * * 02/27/2002 -- Modified to support "highpte" implementation in 2.5.5 (Sam) * * moved 1/26/2000 Sam Creasey */ #ifndef _SUN3_PGALLOC_H #define _SUN3_PGALLOC_H #include <asm/tlb.h> /* FIXME - when we get this compiling */ /* erm, now that it's compiling, what do we do with it? */ #define _KERNPG_TABLE 0 extern const char bad_pmd_string[]; #define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); }) static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) { free_page((unsigned long) pte); } static inline void pte_free(struct mm_struct *mm, pgtable_t page) { pgtable_page_dtor(page); __free_page(page); } #define __pte_free_tlb(tlb,pte) \ do { \ pgtable_page_dtor(pte); \ tlb_remove_page((tlb), pte); \ } while (0) static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address) { unsigned long page = __get_free_page(GFP_KERNEL|__GFP_REPEAT); if (!page) return NULL; memset((void *)page, 0, PAGE_SIZE); return (pte_t *) (page); } static inline pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address) { struct page *page = alloc_pages(GFP_KERNEL|__GFP_REPEAT, 0); if (page == NULL) return NULL; clear_highpage(page); pgtable_page_ctor(page); return page; } static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte) { pmd_val(*pmd) = __pa((unsigned long)pte); } static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page) { pmd_val(*pmd) = __pa((unsigned long)page_address(page)); } #define pmd_pgtable(pmd) pmd_page(pmd) /* * allocating and freeing a pmd is trivial: the 1-entry pmd is * inside the pgd, so has no extra memory associated with it. */ #define pmd_free(mm, x) do { } while (0) #define __pmd_free_tlb(tlb, x) do { } while (0) static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) { free_page((unsigned long) pgd); } static inline pgd_t * pgd_alloc(struct mm_struct *mm) { pgd_t *new_pgd; new_pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL); memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE); memset(new_pgd, 0, (PAGE_OFFSET >> PGDIR_SHIFT)); return new_pgd; } #define pgd_populate(mm, pmd, pte) BUG() #endif /* SUN3_PGALLOC_H */