1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * page.h: Various defines and such for MMU operations on the Sparc for 4 * the Linux kernel. 5 * 6 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) 7 */ 8 9 #ifndef _SPARC_PAGE_H 10 #define _SPARC_PAGE_H 11 12 #include <linux/const.h> 13 14 #include <vdso/page.h> 15 16 #ifndef __ASSEMBLY__ 17 18 #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) 19 #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE) 20 #define clear_user_page(addr, vaddr, page) \ 21 do { clear_page(addr); \ 22 sparc_flush_page_to_ram(page); \ 23 } while (0) 24 #define copy_user_page(to, from, vaddr, page) \ 25 do { copy_page(to, from); \ 26 sparc_flush_page_to_ram(page); \ 27 } while (0) 28 29 /* The following structure is used to hold the physical 30 * memory configuration of the machine. This is filled in 31 * prom_meminit() and is later used by mem_init() to set up 32 * mem_map[]. We statically allocate SPARC_PHYS_BANKS+1 of 33 * these structs, this is arbitrary. The entry after the 34 * last valid one has num_bytes==0. 35 */ 36 struct sparc_phys_banks { 37 unsigned long base_addr; 38 unsigned long num_bytes; 39 }; 40 41 #define SPARC_PHYS_BANKS 32 42 43 extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS+1]; 44 45 /* passing structs on the Sparc slow us down tremendously... */ 46 47 /* #define STRICT_MM_TYPECHECKS */ 48 49 #ifdef STRICT_MM_TYPECHECKS 50 /* 51 * These are used to make use of C type-checking.. 52 */ 53 typedef struct { unsigned long pte; } pte_t; 54 typedef struct { unsigned long iopte; } iopte_t; 55 typedef struct { unsigned long pmd; } pmd_t; 56 typedef struct { unsigned long pgd; } pgd_t; 57 typedef struct { unsigned long ctxd; } ctxd_t; 58 typedef struct { unsigned long pgprot; } pgprot_t; 59 typedef struct { unsigned long iopgprot; } iopgprot_t; 60 61 #define pte_val(x) ((x).pte) 62 #define iopte_val(x) ((x).iopte) 63 #define pmd_val(x) ((x).pmd) 64 #define pgd_val(x) ((x).pgd) 65 #define ctxd_val(x) ((x).ctxd) 66 #define pgprot_val(x) ((x).pgprot) 67 #define iopgprot_val(x) ((x).iopgprot) 68 69 #define __pte(x) ((pte_t) { (x) } ) 70 #define __pmd(x) ((pmd_t) { { (x) }, }) 71 #define __iopte(x) ((iopte_t) { (x) } ) 72 #define __pgd(x) ((pgd_t) { (x) } ) 73 #define __ctxd(x) ((ctxd_t) { (x) } ) 74 #define __pgprot(x) ((pgprot_t) { (x) } ) 75 #define __iopgprot(x) ((iopgprot_t) { (x) } ) 76 77 #else 78 /* 79 * .. while these make it easier on the compiler 80 */ 81 typedef unsigned long pte_t; 82 typedef unsigned long iopte_t; 83 typedef unsigned long pmd_t; 84 typedef unsigned long pgd_t; 85 typedef unsigned long ctxd_t; 86 typedef unsigned long pgprot_t; 87 typedef unsigned long iopgprot_t; 88 89 #define pte_val(x) (x) 90 #define iopte_val(x) (x) 91 #define pmd_val(x) (x) 92 #define pgd_val(x) (x) 93 #define ctxd_val(x) (x) 94 #define pgprot_val(x) (x) 95 #define iopgprot_val(x) (x) 96 97 #define __pte(x) (x) 98 #define __pmd(x) (x) 99 #define __iopte(x) (x) 100 #define __pgd(x) (x) 101 #define __ctxd(x) (x) 102 #define __pgprot(x) (x) 103 #define __iopgprot(x) (x) 104 105 #endif 106 107 typedef pte_t *pgtable_t; 108 109 #define TASK_UNMAPPED_BASE 0x50000000 110 111 #else /* !(__ASSEMBLY__) */ 112 113 #define __pgprot(x) (x) 114 115 #endif /* !(__ASSEMBLY__) */ 116 117 #define PAGE_OFFSET 0xf0000000 118 #ifndef __ASSEMBLY__ 119 extern unsigned long phys_base; 120 extern unsigned long pfn_base; 121 #endif 122 #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + phys_base) 123 #define __va(x) ((void *)((unsigned long) (x) - phys_base + PAGE_OFFSET)) 124 125 #define virt_to_phys __pa 126 #define phys_to_virt __va 127 128 #define ARCH_PFN_OFFSET (pfn_base) 129 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) 130 131 #define virt_addr_valid(kaddr) ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT) < max_mapnr) 132 133 #include <asm-generic/memory_model.h> 134 #include <asm-generic/getorder.h> 135 136 #endif /* _SPARC_PAGE_H */ 137