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 (1UL << 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 extern void purge_kernel_dcache_page(unsigned long);
30 extern void copy_user_page_asm(void *to
, void *from
);
31 extern void clear_user_page_asm(void *page
, unsigned long vaddr
);
34 copy_user_page(void *vto
, void *vfrom
, unsigned long vaddr
, struct page
*pg
)
36 copy_user_page_asm(vto
, vfrom
);
37 flush_kernel_dcache_page_asm(vto
);
38 /* XXX: ppc flushes icache too, should we? */
42 clear_user_page(void *page
, unsigned long vaddr
, struct page
*pg
)
44 purge_kernel_dcache_page((unsigned long)page
);
45 clear_user_page_asm(page
, vaddr
);
49 * These are used to make use of C type-checking..
51 #define STRICT_MM_TYPECHECKS
52 #ifdef STRICT_MM_TYPECHECKS
53 typedef struct { unsigned long pte
;
54 #if !defined(CONFIG_64BIT)
55 unsigned long future_flags
;
56 /* XXX: it's possible to remove future_flags and change BITS_PER_PTE_ENTRY
57 to 2, but then strangely the identical 32bit kernel boots on a
58 c3000(pa20), but not any longer on a 715(pa11).
59 Still investigating... HelgeD.
62 } pte_t
; /* either 32 or 64bit */
64 /* NOTE: even on 64 bits, these entries are __u32 because we allocate
65 * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */
66 typedef struct { __u32 pmd
; } pmd_t
;
67 typedef struct { __u32 pgd
; } pgd_t
;
68 typedef struct { unsigned long pgprot
; } pgprot_t
;
70 #define pte_val(x) ((x).pte)
71 /* These do not work lvalues, so make sure we don't use them as such. */
72 #define pmd_val(x) ((x).pmd + 0)
73 #define pgd_val(x) ((x).pgd + 0)
74 #define pgprot_val(x) ((x).pgprot)
76 #define __pte(x) ((pte_t) { (x) } )
77 #define __pmd(x) ((pmd_t) { (x) } )
78 #define __pgd(x) ((pgd_t) { (x) } )
79 #define __pgprot(x) ((pgprot_t) { (x) } )
81 #define __pmd_val_set(x,n) (x).pmd = (n)
82 #define __pgd_val_set(x,n) (x).pgd = (n)
86 * .. while these make it easier on the compiler
88 typedef unsigned long pte_t
;
91 typedef unsigned long pgprot_t
;
93 #define pte_val(x) (x)
94 #define pmd_val(x) (x)
95 #define pgd_val(x) (x)
96 #define pgprot_val(x) (x)
101 #define __pgprot(x) (x)
103 #define __pmd_val_set(x,n) (x) = (n)
104 #define __pgd_val_set(x,n) (x) = (n)
106 #endif /* STRICT_MM_TYPECHECKS */
109 typedef struct __physmem_range
{
110 unsigned long start_pfn
;
111 unsigned long pages
; /* PAGE_SIZE pages */
114 extern physmem_range_t pmem_ranges
[];
115 extern int npmem_ranges
;
117 #endif /* !__ASSEMBLY__ */
119 /* WARNING: The definitions below must match exactly to sizeof(pte_t)
123 #define BITS_PER_PTE_ENTRY 3
124 #define BITS_PER_PMD_ENTRY 2
125 #define BITS_PER_PGD_ENTRY 2
127 #define BITS_PER_PTE_ENTRY 3
128 #define BITS_PER_PMD_ENTRY 2
129 #define BITS_PER_PGD_ENTRY BITS_PER_PMD_ENTRY
131 #define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY)
132 #define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY)
133 #define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY)
135 /* to align the pointer to the (next) page boundary */
136 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
139 #define LINUX_GATEWAY_SPACE 0
141 /* This governs the relationship between virtual and physical addresses.
142 * If you alter it, make sure to take care of our various fixed mapping
143 * segments in fixmap.h */
144 #define __PAGE_OFFSET (0x10000000)
146 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
148 /* The size of the gateway page (we leave lots of room for expansion) */
149 #define GATEWAY_PAGE_SIZE 0x4000
151 /* The start of the actual kernel binary---used in vmlinux.lds.S
152 * Leave some space after __PAGE_OFFSET for detecting kernel null
154 #define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000)
156 /* These macros don't work for 64-bit C code -- don't allow in C at all */
158 # define PA(x) ((x)-__PAGE_OFFSET)
159 # define VA(x) ((x)+__PAGE_OFFSET)
161 #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
162 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
164 #ifndef CONFIG_DISCONTIGMEM
165 #define pfn_valid(pfn) ((pfn) < max_mapnr)
166 #endif /* CONFIG_DISCONTIGMEM */
168 #ifdef CONFIG_HUGETLB_PAGE
169 #define HPAGE_SHIFT 22 /* 4MB (is this fixed?) */
170 #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
171 #define HPAGE_MASK (~(HPAGE_SIZE - 1))
172 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
175 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
177 #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
178 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
180 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
181 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
183 #include <asm-generic/memory_model.h>
184 #include <asm-generic/page.h>
186 #endif /* __KERNEL__ */
188 #endif /* _PARISC_PAGE_H */