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) clear_page_asm((void *)(page))
25 #define copy_page(to, from) copy_page_asm((void *)(to), (void *)(from))
29 void clear_page_asm(void *page);
30 void copy_page_asm(void *to, void *from);
31 #define clear_user_page(vto, vaddr, page) clear_page_asm(vto)
32 void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
36 * These are used to make use of C type-checking..
38 #define STRICT_MM_TYPECHECKS
39 #ifdef STRICT_MM_TYPECHECKS
40 typedef struct { unsigned long pte; } pte_t; /* either 32 or 64bit */
42 /* NOTE: even on 64 bits, these entries are __u32 because we allocate
43 * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */
44 typedef struct { __u32 pmd; } pmd_t;
45 typedef struct { __u32 pgd; } pgd_t;
46 typedef struct { unsigned long pgprot; } pgprot_t;
48 #define pte_val(x) ((x).pte)
49 /* These do not work lvalues, so make sure we don't use them as such. */
50 #define pmd_val(x) ((x).pmd + 0)
51 #define pgd_val(x) ((x).pgd + 0)
52 #define pgprot_val(x) ((x).pgprot)
54 #define __pte(x) ((pte_t) { (x) } )
55 #define __pmd(x) ((pmd_t) { (x) } )
56 #define __pgd(x) ((pgd_t) { (x) } )
57 #define __pgprot(x) ((pgprot_t) { (x) } )
59 #define __pmd_val_set(x,n) (x).pmd = (n)
60 #define __pgd_val_set(x,n) (x).pgd = (n)
64 * .. while these make it easier on the compiler
66 typedef unsigned long pte_t;
69 typedef unsigned long pgprot_t;
71 #define pte_val(x) (x)
72 #define pmd_val(x) (x)
73 #define pgd_val(x) (x)
74 #define pgprot_val(x) (x)
79 #define __pgprot(x) (x)
81 #define __pmd_val_set(x,n) (x) = (n)
82 #define __pgd_val_set(x,n) (x) = (n)
84 #endif /* STRICT_MM_TYPECHECKS */
86 typedef struct page *pgtable_t;
88 typedef struct __physmem_range {
89 unsigned long start_pfn;
90 unsigned long pages; /* PAGE_SIZE pages */
93 extern physmem_range_t pmem_ranges[];
94 extern int npmem_ranges;
96 #endif /* !__ASSEMBLY__ */
98 /* WARNING: The definitions below must match exactly to sizeof(pte_t)
102 #define BITS_PER_PTE_ENTRY 3
103 #define BITS_PER_PMD_ENTRY 2
104 #define BITS_PER_PGD_ENTRY 2
106 #define BITS_PER_PTE_ENTRY 2
107 #define BITS_PER_PMD_ENTRY 2
108 #define BITS_PER_PGD_ENTRY BITS_PER_PMD_ENTRY
110 #define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY)
111 #define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY)
112 #define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY)
114 #define LINUX_GATEWAY_SPACE 0
116 /* This governs the relationship between virtual and physical addresses.
117 * If you alter it, make sure to take care of our various fixed mapping
118 * segments in fixmap.h */
120 #define __PAGE_OFFSET (0x40000000) /* 1GB */
122 #define __PAGE_OFFSET (0x10000000) /* 256MB */
125 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
127 /* The size of the gateway page (we leave lots of room for expansion) */
128 #define GATEWAY_PAGE_SIZE 0x4000
130 /* The start of the actual kernel binary---used in vmlinux.lds.S
131 * Leave some space after __PAGE_OFFSET for detecting kernel null
133 #define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000)
135 /* These macros don't work for 64-bit C code -- don't allow in C at all */
137 # define PA(x) ((x)-__PAGE_OFFSET)
138 # define VA(x) ((x)+__PAGE_OFFSET)
140 #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
141 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
143 #ifndef CONFIG_DISCONTIGMEM
144 #define pfn_valid(pfn) ((pfn) < max_mapnr)
145 #endif /* CONFIG_DISCONTIGMEM */
147 #ifdef CONFIG_HUGETLB_PAGE
148 #define HPAGE_SHIFT PMD_SHIFT /* fixed for transparent huge pages */
149 #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
150 #define HPAGE_MASK (~(HPAGE_SIZE - 1))
151 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
153 #if defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB)
154 # define REAL_HPAGE_SHIFT 20 /* 20 = 1MB */
155 # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_1M
156 #elif !defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB)
157 # define REAL_HPAGE_SHIFT 22 /* 22 = 4MB */
158 # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_4M
160 # define REAL_HPAGE_SHIFT 24 /* 24 = 16MB */
161 # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_16M
163 #endif /* CONFIG_HUGETLB_PAGE */
165 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
167 #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
168 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
170 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
171 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
173 #include <asm-generic/memory_model.h>
174 #include <asm-generic/getorder.h>
177 #define PAGE0 ((struct zeropage *)__PAGE_OFFSET)
179 /* DEFINITION OF THE ZERO-PAGE (PAG0) */
180 /* based on work by Jason Eckhardt (jason@equator.com) */
182 #endif /* _PARISC_PAGE_H */