1#ifndef _BLACKFIN_PGTABLE_H 2#define _BLACKFIN_PGTABLE_H 3 4#include <asm-generic/4level-fixup.h> 5 6#include <asm/page.h> 7#include <asm/cplb.h> 8 9typedef pte_t *pte_addr_t; 10/* 11* Trivial page table functions. 12*/ 13#define pgd_present(pgd) (1) 14#define pgd_none(pgd) (0) 15#define pgd_bad(pgd) (0) 16#define pgd_clear(pgdp) 17#define kern_addr_valid(addr) (1) 18 19#define pmd_offset(a, b) ((void *)0) 20#define pmd_none(x) (!pmd_val(x)) 21#define pmd_present(x) (pmd_val(x)) 22#define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0) 23#define pmd_bad(x) (pmd_val(x) & ~PAGE_MASK) 24 25#define kern_addr_valid(addr) (1) 26 27#define PAGE_NONE __pgprot(0) /* these mean nothing to NO_MM */ 28#define PAGE_SHARED __pgprot(0) /* these mean nothing to NO_MM */ 29#define PAGE_COPY __pgprot(0) /* these mean nothing to NO_MM */ 30#define PAGE_READONLY __pgprot(0) /* these mean nothing to NO_MM */ 31#define PAGE_KERNEL __pgprot(0) /* these mean nothing to NO_MM */ 32 33extern void paging_init(void); 34 35#define __swp_type(x) (0) 36#define __swp_offset(x) (0) 37#define __swp_entry(typ,off) ((swp_entry_t) { ((typ) | ((off) << 7)) }) 38#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) 39#define __swp_entry_to_pte(x) ((pte_t) { (x).val }) 40 41static inline int pte_file(pte_t pte) 42{ 43 return 0; 44} 45 46#define set_pte(pteptr, pteval) (*(pteptr) = pteval) 47#define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval) 48 49/* 50 * Page assess control based on Blackfin CPLB management 51 */ 52#define _PAGE_RD (CPLB_USER_RD) 53#define _PAGE_WR (CPLB_USER_WR) 54#define _PAGE_USER (CPLB_USER_RD | CPLB_USER_WR) 55#define _PAGE_ACCESSED CPLB_ALL_ACCESS 56#define _PAGE_DIRTY (CPLB_DIRTY) 57 58#define PTE_BIT_FUNC(fn, op) \ 59 static inline pte_t pte_##fn(pte_t _pte) { _pte.pte op; return _pte; } 60 61PTE_BIT_FUNC(rdprotect, &= ~_PAGE_RD); 62PTE_BIT_FUNC(mkread, |= _PAGE_RD); 63PTE_BIT_FUNC(wrprotect, &= ~_PAGE_WR); 64PTE_BIT_FUNC(mkwrite, |= _PAGE_WR); 65PTE_BIT_FUNC(exprotect, &= ~_PAGE_USER); 66PTE_BIT_FUNC(mkexec, |= _PAGE_USER); 67PTE_BIT_FUNC(mkclean, &= ~_PAGE_DIRTY); 68PTE_BIT_FUNC(mkdirty, |= _PAGE_DIRTY); 69PTE_BIT_FUNC(mkold, &= ~_PAGE_ACCESSED); 70PTE_BIT_FUNC(mkyoung, |= _PAGE_ACCESSED); 71 72/* 73 * ZERO_PAGE is a global shared page that is always zero: used 74 * for zero-mapped memory areas etc.. 75 */ 76#define ZERO_PAGE(vaddr) (virt_to_page(0)) 77 78extern unsigned int kobjsize(const void *objp); 79 80#define swapper_pg_dir ((pgd_t *) 0) 81/* 82 * No page table caches to initialise. 83 */ 84#define pgtable_cache_init() do { } while (0) 85#define io_remap_pfn_range remap_pfn_range 86 87/* 88 * All 32bit addresses are effectively valid for vmalloc... 89 * Sort of meaningless for non-VM targets. 90 */ 91#define VMALLOC_START 0 92#define VMALLOC_END 0xffffffff 93 94#include <asm-generic/pgtable.h> 95 96#endif /* _BLACKFIN_PGTABLE_H */ 97