1 #ifndef _ASM_POWERPC_PGTABLE_H 2 #define _ASM_POWERPC_PGTABLE_H 3 #ifdef __KERNEL__ 4 5 #ifndef __ASSEMBLY__ 6 #include <asm/processor.h> /* For TASK_SIZE */ 7 #include <asm/mmu.h> 8 #include <asm/page.h> 9 struct mm_struct; 10 #endif /* !__ASSEMBLY__ */ 11 12 #if defined(CONFIG_PPC64) 13 # include <asm/pgtable-ppc64.h> 14 #else 15 # include <asm/pgtable-ppc32.h> 16 #endif 17 18 #ifndef __ASSEMBLY__ 19 /* 20 * ZERO_PAGE is a global shared page that is always zero: used 21 * for zero-mapped memory areas etc.. 22 */ 23 extern unsigned long empty_zero_page[]; 24 #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) 25 26 extern pgd_t swapper_pg_dir[]; 27 28 extern void paging_init(void); 29 30 /* 31 * kern_addr_valid is intended to indicate whether an address is a valid 32 * kernel address. Most 32-bit archs define it as always true (like this) 33 * but most 64-bit archs actually perform a test. What should we do here? 34 */ 35 #define kern_addr_valid(addr) (1) 36 37 #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \ 38 remap_pfn_range(vma, vaddr, pfn, size, prot) 39 40 #include <asm-generic/pgtable.h> 41 42 43 /* 44 * This gets called at the end of handling a page fault, when 45 * the kernel has put a new PTE into the page table for the process. 46 * We use it to ensure coherency between the i-cache and d-cache 47 * for the page which has just been mapped in. 48 * On machines which use an MMU hash table, we use this to put a 49 * corresponding HPTE into the hash table ahead of time, instead of 50 * waiting for the inevitable extra hash-table miss exception. 51 */ 52 extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t); 53 54 #endif /* __ASSEMBLY__ */ 55 56 #endif /* __KERNEL__ */ 57 #endif /* _ASM_POWERPC_PGTABLE_H */ 58