4 #if !defined(__KERNEL__)
5 /* this is for userspace applications (4k page size) */
6 # define PAGE_SHIFT 12 /* 4k */
7 # define PAGE_SIZE (1UL << PAGE_SHIFT)
8 # define PAGE_MASK (~(PAGE_SIZE-1))
14 #if defined(CONFIG_PARISC_PAGE_SIZE_4KB)
15 # define PAGE_SHIFT 12 /* 4k */
16 #elif defined(CONFIG_PARISC_PAGE_SIZE_16KB)
17 # define PAGE_SHIFT 14 /* 16k */
18 #elif defined(CONFIG_PARISC_PAGE_SIZE_64KB)
19 # define PAGE_SHIFT 16 /* 64k */
21 # error "unknown default kernel page size"
23 #define PAGE_SIZE (1UL << PAGE_SHIFT)
24 #define PAGE_MASK (~(PAGE_SIZE-1))
29 #include <asm/types.h>
30 #include <asm/cache.h>
32 #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
33 #define copy_page(to,from) copy_user_page_asm((void *)(to), (void *)(from))
37 extern void purge_kernel_dcache_page(unsigned long);
38 extern void copy_user_page_asm(void *to, void *from);
39 extern void clear_user_page_asm(void *page, unsigned long vaddr);
42 copy_user_page(void *vto, void *vfrom, unsigned long vaddr, struct page *pg)
44 copy_user_page_asm(vto, vfrom);
45 flush_kernel_dcache_page_asm(vto);
46 /* XXX: ppc flushes icache too, should we? */
50 clear_user_page(void *page, unsigned long vaddr, struct page *pg)
52 purge_kernel_dcache_page((unsigned long)page);
53 clear_user_page_asm(page, vaddr);
57 * These are used to make use of C type-checking..
59 #define STRICT_MM_TYPECHECKS
60 #ifdef STRICT_MM_TYPECHECKS
61 typedef struct { unsigned long pte;
62 #if !defined(CONFIG_64BIT)
63 unsigned long future_flags;
64 /* XXX: it's possible to remove future_flags and change BITS_PER_PTE_ENTRY
65 to 2, but then strangely the identical 32bit kernel boots on a
66 c3000(pa20), but not any longer on a 715(pa11).
67 Still investigating... HelgeD.
70 } pte_t; /* either 32 or 64bit */
72 /* NOTE: even on 64 bits, these entries are __u32 because we allocate
73 * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */
74 typedef struct { __u32 pmd; } pmd_t;
75 typedef struct { __u32 pgd; } pgd_t;
76 typedef struct { unsigned long pgprot; } pgprot_t;
78 #define pte_val(x) ((x).pte)
79 /* These do not work lvalues, so make sure we don't use them as such. */
80 #define pmd_val(x) ((x).pmd + 0)
81 #define pgd_val(x) ((x).pgd + 0)
82 #define pgprot_val(x) ((x).pgprot)
84 #define __pte(x) ((pte_t) { (x) } )
85 #define __pmd(x) ((pmd_t) { (x) } )
86 #define __pgd(x) ((pgd_t) { (x) } )
87 #define __pgprot(x) ((pgprot_t) { (x) } )
89 #define __pmd_val_set(x,n) (x).pmd = (n)
90 #define __pgd_val_set(x,n) (x).pgd = (n)
94 * .. while these make it easier on the compiler
96 typedef unsigned long pte_t;
99 typedef unsigned long pgprot_t;
101 #define pte_val(x) (x)
102 #define pmd_val(x) (x)
103 #define pgd_val(x) (x)
104 #define pgprot_val(x) (x)
109 #define __pgprot(x) (x)
111 #define __pmd_val_set(x,n) (x) = (n)
112 #define __pgd_val_set(x,n) (x) = (n)
114 #endif /* STRICT_MM_TYPECHECKS */
117 typedef struct __physmem_range {
118 unsigned long start_pfn;
119 unsigned long pages; /* PAGE_SIZE pages */
122 extern physmem_range_t pmem_ranges[];
123 extern int npmem_ranges;
125 #endif /* !__ASSEMBLY__ */
127 /* WARNING: The definitions below must match exactly to sizeof(pte_t)
131 #define BITS_PER_PTE_ENTRY 3
132 #define BITS_PER_PMD_ENTRY 2
133 #define BITS_PER_PGD_ENTRY 2
135 #define BITS_PER_PTE_ENTRY 3
136 #define BITS_PER_PMD_ENTRY 2
137 #define BITS_PER_PGD_ENTRY BITS_PER_PMD_ENTRY
139 #define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY)
140 #define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY)
141 #define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY)
143 /* to align the pointer to the (next) page boundary */
144 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
147 #define LINUX_GATEWAY_SPACE 0
149 /* This governs the relationship between virtual and physical addresses.
150 * If you alter it, make sure to take care of our various fixed mapping
151 * segments in fixmap.h */
152 #define __PAGE_OFFSET (0x10000000)
154 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
156 /* The size of the gateway page (we leave lots of room for expansion) */
157 #define GATEWAY_PAGE_SIZE 0x4000
159 /* The start of the actual kernel binary---used in vmlinux.lds.S
160 * Leave some space after __PAGE_OFFSET for detecting kernel null
162 #define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000)
164 /* These macros don't work for 64-bit C code -- don't allow in C at all */
166 # define PA(x) ((x)-__PAGE_OFFSET)
167 # define VA(x) ((x)+__PAGE_OFFSET)
169 #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
170 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
172 #ifndef CONFIG_DISCONTIGMEM
173 #define pfn_valid(pfn) ((pfn) < max_mapnr)
174 #endif /* CONFIG_DISCONTIGMEM */
176 #ifdef CONFIG_HUGETLB_PAGE
177 #define HPAGE_SHIFT 22 /* 4MB (is this fixed?) */
178 #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
179 #define HPAGE_MASK (~(HPAGE_SIZE - 1))
180 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
183 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
185 #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
186 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
188 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
189 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
191 #endif /* __KERNEL__ */
193 #include <asm-generic/memory_model.h>
194 #include <asm-generic/page.h>
196 #endif /* _PARISC_PAGE_H */