4 #include <linux/const.h>
6 #if defined(CONFIG_PARISC_PAGE_SIZE_4KB)
8 #elif defined(CONFIG_PARISC_PAGE_SIZE_16KB)
10 #elif defined(CONFIG_PARISC_PAGE_SIZE_64KB)
11 # define PAGE_SHIFT 16
13 # error "unknown default kernel page size"
15 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
16 #define PAGE_MASK (~(PAGE_SIZE-1))
21 #include <asm/types.h>
22 #include <asm/cache.h>
24 #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
25 #define copy_page(to,from) copy_user_page_asm((void *)(to), (void *)(from))
29 void copy_user_page_asm(void *to, void *from);
30 void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
32 void clear_user_page(void *page, unsigned long vaddr, struct page *pg);
35 * These are used to make use of C type-checking..
37 #define STRICT_MM_TYPECHECKS
38 #ifdef STRICT_MM_TYPECHECKS
39 typedef struct { unsigned long pte;
40 #if !defined(CONFIG_64BIT)
41 unsigned long future_flags;
42 /* XXX: it's possible to remove future_flags and change BITS_PER_PTE_ENTRY
43 to 2, but then strangely the identical 32bit kernel boots on a
44 c3000(pa20), but not any longer on a 715(pa11).
45 Still investigating... HelgeD.
48 } pte_t; /* either 32 or 64bit */
50 /* NOTE: even on 64 bits, these entries are __u32 because we allocate
51 * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */
52 typedef struct { __u32 pmd; } pmd_t;
53 typedef struct { __u32 pgd; } pgd_t;
54 typedef struct { unsigned long pgprot; } pgprot_t;
56 #define pte_val(x) ((x).pte)
57 /* These do not work lvalues, so make sure we don't use them as such. */
58 #define pmd_val(x) ((x).pmd + 0)
59 #define pgd_val(x) ((x).pgd + 0)
60 #define pgprot_val(x) ((x).pgprot)
62 #define __pte(x) ((pte_t) { (x) } )
63 #define __pmd(x) ((pmd_t) { (x) } )
64 #define __pgd(x) ((pgd_t) { (x) } )
65 #define __pgprot(x) ((pgprot_t) { (x) } )
67 #define __pmd_val_set(x,n) (x).pmd = (n)
68 #define __pgd_val_set(x,n) (x).pgd = (n)
72 * .. while these make it easier on the compiler
74 typedef unsigned long pte_t;
77 typedef unsigned long pgprot_t;
79 #define pte_val(x) (x)
80 #define pmd_val(x) (x)
81 #define pgd_val(x) (x)
82 #define pgprot_val(x) (x)
87 #define __pgprot(x) (x)
89 #define __pmd_val_set(x,n) (x) = (n)
90 #define __pgd_val_set(x,n) (x) = (n)
92 #endif /* STRICT_MM_TYPECHECKS */
94 typedef struct page *pgtable_t;
96 typedef struct __physmem_range {
97 unsigned long start_pfn;
98 unsigned long pages; /* PAGE_SIZE pages */
101 extern physmem_range_t pmem_ranges[];
102 extern int npmem_ranges;
104 #endif /* !__ASSEMBLY__ */
106 /* WARNING: The definitions below must match exactly to sizeof(pte_t)
110 #define BITS_PER_PTE_ENTRY 3
111 #define BITS_PER_PMD_ENTRY 2
112 #define BITS_PER_PGD_ENTRY 2
114 #define BITS_PER_PTE_ENTRY 3
115 #define BITS_PER_PMD_ENTRY 2
116 #define BITS_PER_PGD_ENTRY BITS_PER_PMD_ENTRY
118 #define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY)
119 #define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY)
120 #define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY)
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 */
128 #define __PAGE_OFFSET (0x40000000) /* 1GB */
130 #define __PAGE_OFFSET (0x10000000) /* 256MB */
133 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
135 /* The size of the gateway page (we leave lots of room for expansion) */
136 #define GATEWAY_PAGE_SIZE 0x4000
138 /* The start of the actual kernel binary---used in vmlinux.lds.S
139 * Leave some space after __PAGE_OFFSET for detecting kernel null
141 #define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000)
143 /* These macros don't work for 64-bit C code -- don't allow in C at all */
145 # define PA(x) ((x)-__PAGE_OFFSET)
146 # define VA(x) ((x)+__PAGE_OFFSET)
148 #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
149 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
151 #ifndef CONFIG_DISCONTIGMEM
152 #define pfn_valid(pfn) ((pfn) < max_mapnr)
153 #endif /* CONFIG_DISCONTIGMEM */
155 #ifdef CONFIG_HUGETLB_PAGE
156 #define HPAGE_SHIFT 22 /* 4MB (is this fixed?) */
157 #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
158 #define HPAGE_MASK (~(HPAGE_SIZE - 1))
159 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
162 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
164 #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
165 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
167 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
168 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
170 #include <asm-generic/memory_model.h>
171 #include <asm-generic/page.h>
173 #endif /* _PARISC_PAGE_H */