1a439fe51SSam Ravnborg /* 2a439fe51SSam Ravnborg * page.h: Various defines and such for MMU operations on the Sparc for 3a439fe51SSam Ravnborg * the Linux kernel. 4a439fe51SSam Ravnborg * 5a439fe51SSam Ravnborg * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) 6a439fe51SSam Ravnborg */ 7a439fe51SSam Ravnborg 8a439fe51SSam Ravnborg #ifndef _SPARC_PAGE_H 9a439fe51SSam Ravnborg #define _SPARC_PAGE_H 10a439fe51SSam Ravnborg 11a439fe51SSam Ravnborg #define PAGE_SHIFT 12 125110bd21SAdrian Bunk 13a439fe51SSam Ravnborg #ifndef __ASSEMBLY__ 14a439fe51SSam Ravnborg /* I have my suspicions... -DaveM */ 15a439fe51SSam Ravnborg #define PAGE_SIZE (1UL << PAGE_SHIFT) 16a439fe51SSam Ravnborg #else 17a439fe51SSam Ravnborg #define PAGE_SIZE (1 << PAGE_SHIFT) 18a439fe51SSam Ravnborg #endif 19a439fe51SSam Ravnborg #define PAGE_MASK (~(PAGE_SIZE-1)) 20a439fe51SSam Ravnborg 21a439fe51SSam Ravnborg #include <asm/btfixup.h> 22a439fe51SSam Ravnborg 23a439fe51SSam Ravnborg #ifndef __ASSEMBLY__ 24a439fe51SSam Ravnborg 25a439fe51SSam Ravnborg #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) 26a439fe51SSam Ravnborg #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE) 27a439fe51SSam Ravnborg #define clear_user_page(addr, vaddr, page) \ 28a439fe51SSam Ravnborg do { clear_page(addr); \ 29a439fe51SSam Ravnborg sparc_flush_page_to_ram(page); \ 30a439fe51SSam Ravnborg } while (0) 31a439fe51SSam Ravnborg #define copy_user_page(to, from, vaddr, page) \ 32a439fe51SSam Ravnborg do { copy_page(to, from); \ 33a439fe51SSam Ravnborg sparc_flush_page_to_ram(page); \ 34a439fe51SSam Ravnborg } while (0) 35a439fe51SSam Ravnborg 36a439fe51SSam Ravnborg /* The following structure is used to hold the physical 37a439fe51SSam Ravnborg * memory configuration of the machine. This is filled in 38a439fe51SSam Ravnborg * prom_meminit() and is later used by mem_init() to set up 39a439fe51SSam Ravnborg * mem_map[]. We statically allocate SPARC_PHYS_BANKS+1 of 40a439fe51SSam Ravnborg * these structs, this is arbitrary. The entry after the 41a439fe51SSam Ravnborg * last valid one has num_bytes==0. 42a439fe51SSam Ravnborg */ 43a439fe51SSam Ravnborg struct sparc_phys_banks { 44a439fe51SSam Ravnborg unsigned long base_addr; 45a439fe51SSam Ravnborg unsigned long num_bytes; 46a439fe51SSam Ravnborg }; 47a439fe51SSam Ravnborg 48a439fe51SSam Ravnborg #define SPARC_PHYS_BANKS 32 49a439fe51SSam Ravnborg 50a439fe51SSam Ravnborg extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS+1]; 51a439fe51SSam Ravnborg 52a439fe51SSam Ravnborg /* Cache alias structure. Entry is valid if context != -1. */ 53a439fe51SSam Ravnborg struct cache_palias { 54a439fe51SSam Ravnborg unsigned long vaddr; 55a439fe51SSam Ravnborg int context; 56a439fe51SSam Ravnborg }; 57a439fe51SSam Ravnborg 58a439fe51SSam Ravnborg /* passing structs on the Sparc slow us down tremendously... */ 59a439fe51SSam Ravnborg 60a439fe51SSam Ravnborg /* #define STRICT_MM_TYPECHECKS */ 61a439fe51SSam Ravnborg 62a439fe51SSam Ravnborg #ifdef STRICT_MM_TYPECHECKS 63a439fe51SSam Ravnborg /* 64a439fe51SSam Ravnborg * These are used to make use of C type-checking.. 65a439fe51SSam Ravnborg */ 66a439fe51SSam Ravnborg typedef struct { unsigned long pte; } pte_t; 67a439fe51SSam Ravnborg typedef struct { unsigned long iopte; } iopte_t; 68a439fe51SSam Ravnborg typedef struct { unsigned long pmdv[16]; } pmd_t; 69a439fe51SSam Ravnborg typedef struct { unsigned long pgd; } pgd_t; 70a439fe51SSam Ravnborg typedef struct { unsigned long ctxd; } ctxd_t; 71a439fe51SSam Ravnborg typedef struct { unsigned long pgprot; } pgprot_t; 72a439fe51SSam Ravnborg typedef struct { unsigned long iopgprot; } iopgprot_t; 73a439fe51SSam Ravnborg 74a439fe51SSam Ravnborg #define pte_val(x) ((x).pte) 75a439fe51SSam Ravnborg #define iopte_val(x) ((x).iopte) 76a439fe51SSam Ravnborg #define pmd_val(x) ((x).pmdv[0]) 77a439fe51SSam Ravnborg #define pgd_val(x) ((x).pgd) 78a439fe51SSam Ravnborg #define ctxd_val(x) ((x).ctxd) 79a439fe51SSam Ravnborg #define pgprot_val(x) ((x).pgprot) 80a439fe51SSam Ravnborg #define iopgprot_val(x) ((x).iopgprot) 81a439fe51SSam Ravnborg 82a439fe51SSam Ravnborg #define __pte(x) ((pte_t) { (x) } ) 83a439fe51SSam Ravnborg #define __iopte(x) ((iopte_t) { (x) } ) 84a439fe51SSam Ravnborg /* #define __pmd(x) ((pmd_t) { (x) } ) */ /* XXX procedure with loop */ 85a439fe51SSam Ravnborg #define __pgd(x) ((pgd_t) { (x) } ) 86a439fe51SSam Ravnborg #define __ctxd(x) ((ctxd_t) { (x) } ) 87a439fe51SSam Ravnborg #define __pgprot(x) ((pgprot_t) { (x) } ) 88a439fe51SSam Ravnborg #define __iopgprot(x) ((iopgprot_t) { (x) } ) 89a439fe51SSam Ravnborg 90a439fe51SSam Ravnborg #else 91a439fe51SSam Ravnborg /* 92a439fe51SSam Ravnborg * .. while these make it easier on the compiler 93a439fe51SSam Ravnborg */ 94a439fe51SSam Ravnborg typedef unsigned long pte_t; 95a439fe51SSam Ravnborg typedef unsigned long iopte_t; 96a439fe51SSam Ravnborg typedef struct { unsigned long pmdv[16]; } pmd_t; 97a439fe51SSam Ravnborg typedef unsigned long pgd_t; 98a439fe51SSam Ravnborg typedef unsigned long ctxd_t; 99a439fe51SSam Ravnborg typedef unsigned long pgprot_t; 100a439fe51SSam Ravnborg typedef unsigned long iopgprot_t; 101a439fe51SSam Ravnborg 102a439fe51SSam Ravnborg #define pte_val(x) (x) 103a439fe51SSam Ravnborg #define iopte_val(x) (x) 104a439fe51SSam Ravnborg #define pmd_val(x) ((x).pmdv[0]) 105a439fe51SSam Ravnborg #define pgd_val(x) (x) 106a439fe51SSam Ravnborg #define ctxd_val(x) (x) 107a439fe51SSam Ravnborg #define pgprot_val(x) (x) 108a439fe51SSam Ravnborg #define iopgprot_val(x) (x) 109a439fe51SSam Ravnborg 110a439fe51SSam Ravnborg #define __pte(x) (x) 111a439fe51SSam Ravnborg #define __iopte(x) (x) 112a439fe51SSam Ravnborg /* #define __pmd(x) (x) */ /* XXX later */ 113a439fe51SSam Ravnborg #define __pgd(x) (x) 114a439fe51SSam Ravnborg #define __ctxd(x) (x) 115a439fe51SSam Ravnborg #define __pgprot(x) (x) 116a439fe51SSam Ravnborg #define __iopgprot(x) (x) 117a439fe51SSam Ravnborg 118a439fe51SSam Ravnborg #endif 119a439fe51SSam Ravnborg 120a439fe51SSam Ravnborg typedef struct page *pgtable_t; 121a439fe51SSam Ravnborg 122a439fe51SSam Ravnborg extern unsigned long sparc_unmapped_base; 123a439fe51SSam Ravnborg 124a439fe51SSam Ravnborg BTFIXUPDEF_SETHI(sparc_unmapped_base) 125a439fe51SSam Ravnborg 126a439fe51SSam Ravnborg #define TASK_UNMAPPED_BASE BTFIXUP_SETHI(sparc_unmapped_base) 127a439fe51SSam Ravnborg 128a439fe51SSam Ravnborg #else /* !(__ASSEMBLY__) */ 129a439fe51SSam Ravnborg 130a439fe51SSam Ravnborg #define __pgprot(x) (x) 131a439fe51SSam Ravnborg 132a439fe51SSam Ravnborg #endif /* !(__ASSEMBLY__) */ 133a439fe51SSam Ravnborg 134a439fe51SSam Ravnborg #define PAGE_OFFSET 0xf0000000 135a439fe51SSam Ravnborg #ifndef __ASSEMBLY__ 136a439fe51SSam Ravnborg extern unsigned long phys_base; 137a439fe51SSam Ravnborg extern unsigned long pfn_base; 138a439fe51SSam Ravnborg #endif 139a439fe51SSam Ravnborg #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + phys_base) 140a439fe51SSam Ravnborg #define __va(x) ((void *)((unsigned long) (x) - phys_base + PAGE_OFFSET)) 141a439fe51SSam Ravnborg 142a439fe51SSam Ravnborg #define virt_to_phys __pa 143a439fe51SSam Ravnborg #define phys_to_virt __va 144a439fe51SSam Ravnborg 145a439fe51SSam Ravnborg #define ARCH_PFN_OFFSET (pfn_base) 146a439fe51SSam Ravnborg #define virt_to_page(kaddr) (mem_map + ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT))) 147a439fe51SSam Ravnborg 148a439fe51SSam Ravnborg #define pfn_valid(pfn) (((pfn) >= (pfn_base)) && (((pfn)-(pfn_base)) < max_mapnr)) 149a439fe51SSam Ravnborg #define virt_addr_valid(kaddr) ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT) < max_mapnr) 150a439fe51SSam Ravnborg 151a439fe51SSam Ravnborg #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ 152a439fe51SSam Ravnborg VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 153a439fe51SSam Ravnborg 154a439fe51SSam Ravnborg #include <asm-generic/memory_model.h> 155a439fe51SSam Ravnborg #include <asm-generic/page.h> 156a439fe51SSam Ravnborg 157a439fe51SSam Ravnborg #endif /* _SPARC_PAGE_H */ 158