Warning: This file is not a C or C++ file. It does not have highlighting.
| 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
|---|---|
| 2 | /* |
| 3 | * Page management definitions for the Hexagon architecture |
| 4 | * |
| 5 | * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved. |
| 6 | */ |
| 7 | |
| 8 | #ifndef _ASM_PAGE_H |
| 9 | #define _ASM_PAGE_H |
| 10 | |
| 11 | #include <linux/const.h> |
| 12 | |
| 13 | /* This is probably not the most graceful way to handle this. */ |
| 14 | |
| 15 | #ifdef CONFIG_PAGE_SIZE_4KB |
| 16 | #define HEXAGON_L1_PTE_SIZE __HVM_PDE_S_4KB |
| 17 | #endif |
| 18 | |
| 19 | #ifdef CONFIG_PAGE_SIZE_16KB |
| 20 | #define HEXAGON_L1_PTE_SIZE __HVM_PDE_S_16KB |
| 21 | #endif |
| 22 | |
| 23 | #ifdef CONFIG_PAGE_SIZE_64KB |
| 24 | #define HEXAGON_L1_PTE_SIZE __HVM_PDE_S_64KB |
| 25 | #endif |
| 26 | |
| 27 | #ifdef CONFIG_PAGE_SIZE_256KB |
| 28 | #define HEXAGON_L1_PTE_SIZE __HVM_PDE_S_256KB |
| 29 | #endif |
| 30 | |
| 31 | #ifdef CONFIG_PAGE_SIZE_1MB |
| 32 | #define HEXAGON_L1_PTE_SIZE __HVM_PDE_S_1MB |
| 33 | #endif |
| 34 | |
| 35 | /* |
| 36 | * These should be defined in hugetlb.h, but apparently not. |
| 37 | * "Huge" for us should be 4MB or 16MB, which are both represented |
| 38 | * in L1 PTE's. Right now, it's set up for 4MB. |
| 39 | */ |
| 40 | #ifdef CONFIG_HUGETLB_PAGE |
| 41 | #define HPAGE_SHIFT 22 |
| 42 | #define HPAGE_SIZE (1UL << HPAGE_SHIFT) |
| 43 | #define HPAGE_MASK (~(HPAGE_SIZE-1)) |
| 44 | #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT-PAGE_SHIFT) |
| 45 | #define HVM_HUGEPAGE_SIZE 0x5 |
| 46 | #endif |
| 47 | |
| 48 | #include <vdso/page.h> |
| 49 | |
| 50 | #ifdef __KERNEL__ |
| 51 | #ifndef __ASSEMBLY__ |
| 52 | |
| 53 | /* |
| 54 | * This is for PFN_DOWN, which mm.h needs. Seems the right place to pull it in. |
| 55 | */ |
| 56 | #include <linux/pfn.h> |
| 57 | |
| 58 | /* |
| 59 | * We implement a two-level architecture-specific page table structure. |
| 60 | * Null intermediate page table level (pmd, pud) definitions will come from |
| 61 | * asm-generic/pagetable-nopmd.h and asm-generic/pagetable-nopud.h |
| 62 | */ |
| 63 | typedef struct { unsigned long pte; } pte_t; |
| 64 | typedef struct { unsigned long pgd; } pgd_t; |
| 65 | typedef struct { unsigned long pgprot; } pgprot_t; |
| 66 | typedef struct page *pgtable_t; |
| 67 | |
| 68 | #define pte_val(x) ((x).pte) |
| 69 | #define pgd_val(x) ((x).pgd) |
| 70 | #define pgprot_val(x) ((x).pgprot) |
| 71 | #define __pte(x) ((pte_t) { (x) }) |
| 72 | #define __pgd(x) ((pgd_t) { (x) }) |
| 73 | #define __pgprot(x) ((pgprot_t) { (x) }) |
| 74 | |
| 75 | /* Needed for PAGE_OFFSET used in the macro right below */ |
| 76 | #include <asm/mem-layout.h> |
| 77 | |
| 78 | /* |
| 79 | * We need a __pa and a __va routine for kernel space. |
| 80 | * MIPS says they're only used during mem_init. |
| 81 | * also, check if we need a PHYS_OFFSET. |
| 82 | */ |
| 83 | #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + PHYS_OFFSET) |
| 84 | #define __va(x) ((void *)((unsigned long)(x) - PHYS_OFFSET + PAGE_OFFSET)) |
| 85 | |
| 86 | /* The "page frame" descriptor is defined in linux/mm.h */ |
| 87 | struct page; |
| 88 | |
| 89 | /* Returns page frame descriptor for virtual address. */ |
| 90 | #define virt_to_page(kaddr) pfn_to_page(PFN_DOWN(__pa(kaddr))) |
| 91 | |
| 92 | /* Default vm area behavior is non-executable. */ |
| 93 | #define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_NON_EXEC |
| 94 | |
| 95 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) |
| 96 | |
| 97 | /* Need to not use a define for linesize; may move this to another file. */ |
| 98 | static inline void clear_page(void *page) |
| 99 | { |
| 100 | /* This can only be done on pages with L1 WB cache */ |
| 101 | asm volatile( |
| 102 | " loop0(1f,%1);\n" |
| 103 | "1: { dczeroa(%0);\n" |
| 104 | " %0 = add(%0,#32); }:endloop0\n" |
| 105 | : "+r" (page) |
| 106 | : "r" (PAGE_SIZE/32) |
| 107 | : "lc0", "sa0", "memory" |
| 108 | ); |
| 109 | } |
| 110 | |
| 111 | #define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) |
| 112 | |
| 113 | /* |
| 114 | * Under assumption that kernel always "sees" user map... |
| 115 | */ |
| 116 | #define clear_user_page(page, vaddr, pg) clear_page(page) |
| 117 | #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) |
| 118 | |
| 119 | static inline unsigned long virt_to_pfn(const void *kaddr) |
| 120 | { |
| 121 | return __pa(kaddr) >> PAGE_SHIFT; |
| 122 | } |
| 123 | |
| 124 | #define page_to_virt(page) __va(page_to_phys(page)) |
| 125 | |
| 126 | #include <asm/mem-layout.h> |
| 127 | #include <asm-generic/memory_model.h> |
| 128 | /* XXX Todo: implement assembly-optimized version of getorder. */ |
| 129 | #include <asm-generic/getorder.h> |
| 130 | |
| 131 | #endif /* ifdef __ASSEMBLY__ */ |
| 132 | #endif /* ifdef __KERNEL__ */ |
| 133 | |
| 134 | #endif |
| 135 |
Warning: This file is not a C or C++ file. It does not have highlighting.