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 /* Unlike sparc32, sparc64's parameter passing API is more
25 * sane in that structures which as small enough are passed
26 * in registers instead of on the stack. Thus, setting
27 * STRICT_MM_TYPECHECKS does not generate worse code so
28 * let's enable it to get the type checking.
31 #define STRICT_MM_TYPECHECKS
33 #ifdef STRICT_MM_TYPECHECKS
34 /* These are used to make use of C type-checking.. */
35 typedef struct { unsigned long pte; } pte_t;
36 typedef struct { unsigned long iopte; } iopte_t;
37 typedef struct { unsigned int pmd; } pmd_t;
38 typedef struct { unsigned int pgd; } pgd_t;
39 typedef struct { unsigned long pgprot; } pgprot_t;
41 #define pte_val(x) ((x).pte)
42 #define iopte_val(x) ((x).iopte)
43 #define pmd_val(x) ((x).pmd)
44 #define pgd_val(x) ((x).pgd)
45 #define pgprot_val(x) ((x).pgprot)
47 #define __pte(x) ((pte_t) { (x) } )
48 #define __iopte(x) ((iopte_t) { (x) } )
49 #define __pmd(x) ((pmd_t) { (x) } )
50 #define __pgd(x) ((pgd_t) { (x) } )
51 #define __pgprot(x) ((pgprot_t) { (x) } )
54 /* .. while these make it easier on the compiler */
55 typedef unsigned long pte_t;
56 typedef unsigned long iopte_t;
57 typedef unsigned int pmd_t;
58 typedef unsigned int pgd_t;
59 typedef unsigned long pgprot_t;
61 #define pte_val(x) (x)
62 #define iopte_val(x) (x)
63 #define pmd_val(x) (x)
64 #define pgd_val(x) (x)
65 #define pgprot_val(x) (x)
68 #define __iopte(x) (x)
71 #define __pgprot(x) (x)
73 #endif /* (STRICT_MM_TYPECHECKS) */
75 #if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
76 #define HPAGE_SHIFT 22
77 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K)
78 #define HPAGE_SHIFT 19
79 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
80 #define HPAGE_SHIFT 16
83 #ifdef CONFIG_HUGETLB_PAGE
84 #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT)
85 #define HPAGE_MASK (~(HPAGE_SIZE - 1UL))
86 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
89 #define TASK_UNMAPPED_BASE (test_thread_flag(TIF_32BIT) ? \
90 (_AC(0x0000000070000000,UL)) : (PAGE_OFFSET))
92 #endif /* !(__ASSEMBLY__) */
94 /* to align the pointer to the (next) page boundary */
95 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
97 /* We used to stick this into a hard-coded global register (%g4)
98 * but that does not make sense anymore.
100 #define PAGE_OFFSET _AC(0xFFFFF80000000000,UL)
104 #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
105 #define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
107 /* PFNs are real physical page numbers. However, mem_map only begins to record
108 * per-page information starting at pfn_base. This is to handle systems where
109 * the first physical page in the machine is at some huge physical address,
110 * such as 4GB. This is common on a partitioned E10000, for example.
112 extern struct page *pfn_to_page(unsigned long pfn);
113 extern unsigned long page_to_pfn(struct page *);
115 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr)>>PAGE_SHIFT)
117 #define pfn_valid(pfn) (((pfn)-(pfn_base)) < max_mapnr)
118 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
120 #define virt_to_phys __pa
121 #define phys_to_virt __va
123 /* The following structure is used to hold the physical
124 * memory configuration of the machine. This is filled in
125 * probe_memory() and is later used by mem_init() to set up
126 * mem_map[]. We statically allocate SPARC_PHYS_BANKS of
127 * these structs, this is arbitrary. The entry after the
128 * last valid one has num_bytes==0.
131 struct sparc_phys_banks {
132 unsigned long base_addr;
133 unsigned long num_bytes;
136 #define SPARC_PHYS_BANKS 32
138 extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS];
140 /* Pure 2^n version of get_order */
141 static __inline__ int get_order(unsigned long size)
145 size = (size-1) >> (PAGE_SHIFT-1);
154 #endif /* !(__ASSEMBLY__) */
156 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
157 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
159 #endif /* !(__KERNEL__) */
161 #endif /* !(_SPARC64_PAGE_H) */