1 /* $Id: page.h,v 1.39 2002/02/09 19:49:31 davem Exp $ */
3 #ifndef _SPARC64_PAGE_H
4 #define _SPARC64_PAGE_H
6 #include <linux/config.h>
10 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
11 #define PAGE_MASK (~(PAGE_SIZE-1))
17 extern void _clear_page(void *page);
18 #define clear_page(X) _clear_page((void *)(X))
20 extern void clear_user_page(void *addr, unsigned long vaddr, struct page *page);
21 #define copy_page(X,Y) memcpy((void *)(X), (void *)(Y), PAGE_SIZE)
22 extern void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage);
24 /* GROSS, defining this makes gcc pass these types as aggregates,
25 * and thus on the stack, turn this crap off... -DaveM
28 /* #define STRICT_MM_TYPECHECKS */
30 #ifdef STRICT_MM_TYPECHECKS
31 /* These are used to make use of C type-checking.. */
32 typedef struct { unsigned long pte; } pte_t;
33 typedef struct { unsigned long iopte; } iopte_t;
34 typedef struct { unsigned int pmd; } pmd_t;
35 typedef struct { unsigned int pgd; } pgd_t;
36 typedef struct { unsigned long ctxd; } ctxd_t;
37 typedef struct { unsigned long pgprot; } pgprot_t;
38 typedef struct { unsigned long iopgprot; } iopgprot_t;
40 #define pte_val(x) ((x).pte)
41 #define iopte_val(x) ((x).iopte)
42 #define pmd_val(x) ((x).pmd)
43 #define pgd_val(x) ((x).pgd)
44 #define ctxd_val(x) ((x).ctxd)
45 #define pgprot_val(x) ((x).pgprot)
46 #define iopgprot_val(x) ((x).iopgprot)
48 #define __pte(x) ((pte_t) { (x) } )
49 #define __iopte(x) ((iopte_t) { (x) } )
50 #define __pmd(x) ((pmd_t) { (x) } )
51 #define __pgd(x) ((pgd_t) { (x) } )
52 #define __ctxd(x) ((ctxd_t) { (x) } )
53 #define __pgprot(x) ((pgprot_t) { (x) } )
54 #define __iopgprot(x) ((iopgprot_t) { (x) } )
57 /* .. while these make it easier on the compiler */
58 typedef unsigned long pte_t;
59 typedef unsigned long iopte_t;
60 typedef unsigned int pmd_t;
61 typedef unsigned int pgd_t;
62 typedef unsigned long ctxd_t;
63 typedef unsigned long pgprot_t;
64 typedef unsigned long iopgprot_t;
66 #define pte_val(x) (x)
67 #define iopte_val(x) (x)
68 #define pmd_val(x) (x)
69 #define pgd_val(x) (x)
70 #define ctxd_val(x) (x)
71 #define pgprot_val(x) (x)
72 #define iopgprot_val(x) (x)
75 #define __iopte(x) (x)
79 #define __pgprot(x) (x)
80 #define __iopgprot(x) (x)
82 #endif /* (STRICT_MM_TYPECHECKS) */
84 #if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
85 #define HPAGE_SHIFT 22
86 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K)
87 #define HPAGE_SHIFT 19
88 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
89 #define HPAGE_SHIFT 16
92 #ifdef CONFIG_HUGETLB_PAGE
93 #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT)
94 #define HPAGE_MASK (~(HPAGE_SIZE - 1UL))
95 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
98 #define TASK_UNMAPPED_BASE (test_thread_flag(TIF_32BIT) ? \
99 (_AC(0x0000000070000000,UL)) : (PAGE_OFFSET))
101 #endif /* !(__ASSEMBLY__) */
103 /* to align the pointer to the (next) page boundary */
104 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
106 /* We used to stick this into a hard-coded global register (%g4)
107 * but that does not make sense anymore.
109 #define PAGE_OFFSET _AC(0xFFFFF80000000000,UL)
113 #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
114 #define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
116 /* PFNs are real physical page numbers. However, mem_map only begins to record
117 * per-page information starting at pfn_base. This is to handle systems where
118 * the first physical page in the machine is at some huge physical address,
119 * such as 4GB. This is common on a partitioned E10000, for example.
121 extern struct page *pfn_to_page(unsigned long pfn);
122 extern unsigned long page_to_pfn(struct page *);
124 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr)>>PAGE_SHIFT)
126 #define pfn_valid(pfn) (((pfn)-(pfn_base)) < max_mapnr)
127 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
129 #define virt_to_phys __pa
130 #define phys_to_virt __va
132 /* The following structure is used to hold the physical
133 * memory configuration of the machine. This is filled in
134 * probe_memory() and is later used by mem_init() to set up
135 * mem_map[]. We statically allocate SPARC_PHYS_BANKS of
136 * these structs, this is arbitrary. The entry after the
137 * last valid one has num_bytes==0.
140 struct sparc_phys_banks {
141 unsigned long base_addr;
142 unsigned long num_bytes;
145 #define SPARC_PHYS_BANKS 32
147 extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS];
149 /* Pure 2^n version of get_order */
150 static __inline__ int get_order(unsigned long size)
154 size = (size-1) >> (PAGE_SHIFT-1);
163 #endif /* !(__ASSEMBLY__) */
165 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
166 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
168 #endif /* !(__KERNEL__) */
170 #endif /* !(_SPARC64_PAGE_H) */