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_asm(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..
43 #define STRICT_MM_TYPECHECKS
44 #ifdef STRICT_MM_TYPECHECKS
45 typedef struct { unsigned long pte
;
46 #if !defined(CONFIG_64BIT)
47 unsigned long future_flags
;
48 /* XXX: it's possible to remove future_flags and change BITS_PER_PTE_ENTRY
49 to 2, but then strangely the identical 32bit kernel boots on a
50 c3000(pa20), but not any longer on a 715(pa11).
51 Still investigating... HelgeD.
54 } pte_t
; /* either 32 or 64bit */
56 /* NOTE: even on 64 bits, these entries are __u32 because we allocate
57 * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */
58 typedef struct { __u32 pmd
; } pmd_t
;
59 typedef struct { __u32 pgd
; } pgd_t
;
60 typedef struct { unsigned long pgprot
; } pgprot_t
;
62 #define pte_val(x) ((x).pte)
63 /* These do not work lvalues, so make sure we don't use them as such. */
64 #define pmd_val(x) ((x).pmd + 0)
65 #define pgd_val(x) ((x).pgd + 0)
66 #define pgprot_val(x) ((x).pgprot)
68 #define __pte(x) ((pte_t) { (x) } )
69 #define __pmd(x) ((pmd_t) { (x) } )
70 #define __pgd(x) ((pgd_t) { (x) } )
71 #define __pgprot(x) ((pgprot_t) { (x) } )
73 #define __pmd_val_set(x,n) (x).pmd = (n)
74 #define __pgd_val_set(x,n) (x).pgd = (n)
78 * .. while these make it easier on the compiler
80 typedef unsigned long pte_t
;
83 typedef unsigned long pgprot_t
;
85 #define pte_val(x) (x)
86 #define pmd_val(x) (x)
87 #define pgd_val(x) (x)
88 #define pgprot_val(x) (x)
93 #define __pgprot(x) (x)
95 #define __pmd_val_set(x,n) (x) = (n)
96 #define __pgd_val_set(x,n) (x) = (n)
98 #endif /* STRICT_MM_TYPECHECKS */
101 typedef struct __physmem_range
{
102 unsigned long start_pfn
;
103 unsigned long pages
; /* PAGE_SIZE pages */
106 extern physmem_range_t pmem_ranges
[];
107 extern int npmem_ranges
;
109 #endif /* !__ASSEMBLY__ */
111 /* WARNING: The definitions below must match exactly to sizeof(pte_t)
115 #define BITS_PER_PTE_ENTRY 3
116 #define BITS_PER_PMD_ENTRY 2
117 #define BITS_PER_PGD_ENTRY 2
119 #define BITS_PER_PTE_ENTRY 3
120 #define BITS_PER_PMD_ENTRY 2
121 #define BITS_PER_PGD_ENTRY BITS_PER_PMD_ENTRY
123 #define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY)
124 #define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY)
125 #define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY)
127 /* to align the pointer to the (next) page boundary */
128 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
131 #define LINUX_GATEWAY_SPACE 0
133 /* This governs the relationship between virtual and physical addresses.
134 * If you alter it, make sure to take care of our various fixed mapping
135 * segments in fixmap.h */
136 #define __PAGE_OFFSET (0x10000000)
138 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
140 /* The size of the gateway page (we leave lots of room for expansion) */
141 #define GATEWAY_PAGE_SIZE 0x4000
143 /* The start of the actual kernel binary---used in vmlinux.lds.S
144 * Leave some space after __PAGE_OFFSET for detecting kernel null
146 #define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000)
148 /* These macros don't work for 64-bit C code -- don't allow in C at all */
150 # define PA(x) ((x)-__PAGE_OFFSET)
151 # define VA(x) ((x)+__PAGE_OFFSET)
153 #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
154 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
156 #ifndef CONFIG_DISCONTIGMEM
157 #define pfn_valid(pfn) ((pfn) < max_mapnr)
158 #endif /* CONFIG_DISCONTIGMEM */
160 #ifdef CONFIG_HUGETLB_PAGE
161 #define HPAGE_SHIFT 22 /* 4MB (is this fixed?) */
162 #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
163 #define HPAGE_MASK (~(HPAGE_SIZE - 1))
164 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
167 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
169 #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
170 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
172 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
173 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
175 #endif /* __KERNEL__ */
177 #include <asm-generic/memory_model.h>
178 #include <asm-generic/page.h>
180 #endif /* _PARISC_PAGE_H */