| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 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 */ |