1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_POWERPC_PGTABLE_H 3 #define _ASM_POWERPC_PGTABLE_H 4 5 #ifndef __ASSEMBLY__ 6 #include <linux/mmdebug.h> 7 #include <linux/mmzone.h> 8 #include <asm/processor.h> /* For TASK_SIZE */ 9 #include <asm/mmu.h> 10 #include <asm/page.h> 11 #include <asm/tlbflush.h> 12 13 struct mm_struct; 14 15 #endif /* !__ASSEMBLY__ */ 16 17 #ifdef CONFIG_PPC_BOOK3S 18 #include <asm/book3s/pgtable.h> 19 #else 20 #include <asm/nohash/pgtable.h> 21 #endif /* !CONFIG_PPC_BOOK3S */ 22 23 #ifndef __ASSEMBLY__ 24 25 #include <asm/tlbflush.h> 26 27 /* Keep these as a macros to avoid include dependency mess */ 28 #define pte_page(x) pfn_to_page(pte_pfn(x)) 29 #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) 30 31 /* 32 * ZERO_PAGE is a global shared page that is always zero: used 33 * for zero-mapped memory areas etc.. 34 */ 35 extern unsigned long empty_zero_page[]; 36 #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) 37 38 extern pgd_t swapper_pg_dir[]; 39 40 void limit_zone_pfn(enum zone_type zone, unsigned long max_pfn); 41 int dma_pfn_limit_to_zone(u64 pfn_limit); 42 extern void paging_init(void); 43 44 /* 45 * kern_addr_valid is intended to indicate whether an address is a valid 46 * kernel address. Most 32-bit archs define it as always true (like this) 47 * but most 64-bit archs actually perform a test. What should we do here? 48 */ 49 #define kern_addr_valid(addr) (1) 50 51 #include <asm-generic/pgtable.h> 52 53 54 /* 55 * This gets called at the end of handling a page fault, when 56 * the kernel has put a new PTE into the page table for the process. 57 * We use it to ensure coherency between the i-cache and d-cache 58 * for the page which has just been mapped in. 59 * On machines which use an MMU hash table, we use this to put a 60 * corresponding HPTE into the hash table ahead of time, instead of 61 * waiting for the inevitable extra hash-table miss exception. 62 */ 63 extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *); 64 65 extern int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long addr, 66 unsigned long end, int write, 67 struct page **pages, int *nr); 68 #ifndef CONFIG_TRANSPARENT_HUGEPAGE 69 #define pmd_large(pmd) 0 70 #endif 71 72 /* can we use this in kvm */ 73 unsigned long vmalloc_to_phys(void *vmalloc_addr); 74 75 void pgtable_cache_add(unsigned shift, void (*ctor)(void *)); 76 void pgtable_cache_init(void); 77 78 #if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_PPC32) 79 void mark_initmem_nx(void); 80 #else 81 static inline void mark_initmem_nx(void) { } 82 #endif 83 84 #endif /* __ASSEMBLY__ */ 85 86 #endif /* _ASM_POWERPC_PGTABLE_H */ 87