#ifndef _BLACKFIN_PGTABLE_H #define _BLACKFIN_PGTABLE_H #include <asm-generic/4level-fixup.h> #include <asm/page.h> #include <asm/cplb.h> typedef pte_t *pte_addr_t; /* * Trivial page table functions. */ #define pgd_present(pgd) (1) #define pgd_none(pgd) (0) #define pgd_bad(pgd) (0) #define pgd_clear(pgdp) #define kern_addr_valid(addr) (1) #define pmd_offset(a, b) ((void *)0) #define pmd_none(x) (!pmd_val(x)) #define pmd_present(x) (pmd_val(x)) #define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0) #define pmd_bad(x) (pmd_val(x) & ~PAGE_MASK) #define kern_addr_valid(addr) (1) #define PAGE_NONE __pgprot(0) /* these mean nothing to NO_MM */ #define PAGE_SHARED __pgprot(0) /* these mean nothing to NO_MM */ #define PAGE_COPY __pgprot(0) /* these mean nothing to NO_MM */ #define PAGE_READONLY __pgprot(0) /* these mean nothing to NO_MM */ #define PAGE_KERNEL __pgprot(0) /* these mean nothing to NO_MM */ extern void paging_init(void); #define __swp_type(x) (0) #define __swp_offset(x) (0) #define __swp_entry(typ,off) ((swp_entry_t) { ((typ) | ((off) << 7)) }) #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) static inline int pte_file(pte_t pte) { return 0; } #define set_pte(pteptr, pteval) (*(pteptr) = pteval) #define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval) /* * Page assess control based on Blackfin CPLB management */ #define _PAGE_RD (CPLB_USER_RD) #define _PAGE_WR (CPLB_USER_WR) #define _PAGE_USER (CPLB_USER_RD | CPLB_USER_WR) #define _PAGE_ACCESSED CPLB_ALL_ACCESS #define _PAGE_DIRTY (CPLB_DIRTY) #define PTE_BIT_FUNC(fn, op) \ static inline pte_t pte_##fn(pte_t _pte) { _pte.pte op; return _pte; } PTE_BIT_FUNC(rdprotect, &= ~_PAGE_RD); PTE_BIT_FUNC(mkread, |= _PAGE_RD); PTE_BIT_FUNC(wrprotect, &= ~_PAGE_WR); PTE_BIT_FUNC(mkwrite, |= _PAGE_WR); PTE_BIT_FUNC(exprotect, &= ~_PAGE_USER); PTE_BIT_FUNC(mkexec, |= _PAGE_USER); PTE_BIT_FUNC(mkclean, &= ~_PAGE_DIRTY); PTE_BIT_FUNC(mkdirty, |= _PAGE_DIRTY); PTE_BIT_FUNC(mkold, &= ~_PAGE_ACCESSED); PTE_BIT_FUNC(mkyoung, |= _PAGE_ACCESSED); /* * ZERO_PAGE is a global shared page that is always zero: used * for zero-mapped memory areas etc.. */ #define ZERO_PAGE(vaddr) (virt_to_page(0)) extern unsigned int kobjsize(const void *objp); #define swapper_pg_dir ((pgd_t *) 0) /* * No page table caches to initialise. */ #define pgtable_cache_init() do { } while (0) #define io_remap_pfn_range remap_pfn_range /* * All 32bit addresses are effectively valid for vmalloc... * Sort of meaningless for non-VM targets. */ #define VMALLOC_START 0 #define VMALLOC_END 0xffffffff #include <asm-generic/pgtable.h> #endif /* _BLACKFIN_PGTABLE_H */