4 /* PAGE_SHIFT determines the page size */
6 #define PAGE_SIZE (1UL << PAGE_SHIFT)
7 #define PAGE_MASK (~(PAGE_SIZE-1))
10 #include <linux/config.h>
13 #include <asm/types.h>
14 #include <asm/cache.h>
16 #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
17 #define copy_page(to,from) copy_user_page_asm((void *)(to), (void *)(from))
21 extern void purge_kernel_dcache_page(unsigned long);
22 extern void copy_user_page_asm(void *to, void *from);
23 extern void clear_user_page_asm(void *page, unsigned long vaddr);
26 copy_user_page(void *vto, void *vfrom, unsigned long vaddr, struct page *pg)
28 copy_user_page_asm(vto, vfrom);
29 flush_kernel_dcache_page(vto);
30 /* XXX: ppc flushes icache too, should we? */
34 clear_user_page(void *page, unsigned long vaddr, struct page *pg)
36 purge_kernel_dcache_page((unsigned long)page);
37 clear_user_page_asm(page, vaddr);
41 * These are used to make use of C type-checking..
44 typedef struct { unsigned long pte; } pte_t;
51 /* NOTE: even on 64 bits, these entries are __u32 because we allocate
52 * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */
53 typedef struct { __u32 pmd; } pmd_t;
54 typedef struct { __u32 pgd; } pgd_t;
55 typedef struct { unsigned long pgprot; } pgprot_t;
57 #define pte_val(x) ((x).pte)
59 #define pte_flags(x) (*(__u32 *)&((x).pte))
61 #define pte_flags(x) ((x).flags)
63 #define pmd_val(x) ((x).pmd)
64 #define pgd_val(x) ((x).pgd)
65 #define pgprot_val(x) ((x).pgprot)
67 #define __pte(x) ((pte_t) { (x) } )
68 #define __pmd(x) ((pmd_t) { (x) } )
69 #define __pgd(x) ((pgd_t) { (x) } )
70 #define __pgprot(x) ((pgprot_t) { (x) } )
72 /* Pure 2^n version of get_order */
73 extern __inline__ int get_order(unsigned long size)
77 size = (size-1) >> (PAGE_SHIFT-1);
87 #define MAX_PHYSMEM_RANGES 8 /* Fix the size for now (current known max is 3) */
89 #define MAX_PHYSMEM_RANGES 1 /* First range is only range that fits in 32 bits */
92 typedef struct __physmem_range {
93 unsigned long start_pfn;
94 unsigned long pages; /* PAGE_SIZE pages */
97 extern physmem_range_t pmem_ranges[];
98 extern int npmem_ranges;
100 #endif /* !__ASSEMBLY__ */
102 /* WARNING: The definitions below must match exactly to sizeof(pte_t)
106 #define BITS_PER_PTE_ENTRY 3
107 #define BITS_PER_PMD_ENTRY 2
108 #define BITS_PER_PGD_ENTRY 2
110 #define BITS_PER_PTE_ENTRY 3
111 #define BITS_PER_PMD_ENTRY 2
112 #define BITS_PER_PGD_ENTRY BITS_PER_PMD_ENTRY
114 #define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY)
115 #define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY)
116 #define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY)
118 /* to align the pointer to the (next) page boundary */
119 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
122 #define LINUX_GATEWAY_SPACE 0
124 /* This governs the relationship between virtual and physical addresses.
125 * If you alter it, make sure to take care of our various fixed mapping
126 * segments in fixmap.h */
127 #define __PAGE_OFFSET (0x10000000)
129 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
131 /* The size of the gateway page (we leave lots of room for expansion) */
132 #define GATEWAY_PAGE_SIZE 0x4000
134 /* The start of the actual kernel binary---used in vmlinux.lds.S
135 * Leave some space after __PAGE_OFFSET for detecting kernel null
137 #define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000)
139 /* These macros don't work for 64-bit C code -- don't allow in C at all */
141 # define PA(x) ((x)-__PAGE_OFFSET)
142 # define VA(x) ((x)+__PAGE_OFFSET)
144 #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
145 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
147 #define pfn_to_page(pfn) (mem_map + (pfn))
148 #define page_to_pfn(page) ((unsigned long)((page) - mem_map))
149 #define pfn_valid(pfn) ((pfn) < max_mapnr)
150 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
152 #ifndef CONFIG_DISCONTIGMEM
153 #define virt_to_page(kaddr) (mem_map + (__pa(kaddr) >> PAGE_SHIFT))
154 #define VALID_PAGE(page) ((page - mem_map) < max_mapnr)
155 #endif /* !CONFIG_DISCONTIGMEM */
157 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
158 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
160 #endif /* __KERNEL__ */
162 #endif /* _PARISC_PAGE_H */