4 #include <linux/const.h>
6 #include <asm/metag_mem.h>
8 /* PAGE_SHIFT determines the page size */
9 #if defined(CONFIG_PAGE_SIZE_4K)
11 #elif defined(CONFIG_PAGE_SIZE_8K)
13 #elif defined(CONFIG_PAGE_SIZE_16K)
17 #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
18 #define PAGE_MASK (~(PAGE_SIZE-1))
20 #if defined(CONFIG_HUGETLB_PAGE_SIZE_8K)
21 # define HPAGE_SHIFT 13
22 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_16K)
23 # define HPAGE_SHIFT 14
24 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_32K)
25 # define HPAGE_SHIFT 15
26 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
27 # define HPAGE_SHIFT 16
28 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_128K)
29 # define HPAGE_SHIFT 17
30 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_256K)
31 # define HPAGE_SHIFT 18
32 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K)
33 # define HPAGE_SHIFT 19
34 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_1M)
35 # define HPAGE_SHIFT 20
36 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_2M)
37 # define HPAGE_SHIFT 21
38 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_4M)
39 # define HPAGE_SHIFT 22
42 #ifdef CONFIG_HUGETLB_PAGE
43 # define HPAGE_SIZE (1UL << HPAGE_SHIFT)
44 # define HPAGE_MASK (~(HPAGE_SIZE-1))
45 # define HUGETLB_PAGE_ORDER (HPAGE_SHIFT-PAGE_SHIFT)
47 * We define our own hugetlb_get_unmapped_area so we don't corrupt 2nd level
48 * page tables with normal pages in them.
50 # define HUGEPT_SHIFT (22)
51 # define HUGEPT_ALIGN (1 << HUGEPT_SHIFT)
52 # define HUGEPT_MASK (HUGEPT_ALIGN - 1)
53 # define ALIGN_HUGEPT(x) ALIGN(x, HUGEPT_ALIGN)
54 # define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
59 /* On the Meta, we would like to know if the address (heap) we have is
60 * in local or global space.
62 #define is_global_space(addr) ((addr) > 0x7fffffff)
63 #define is_local_space(addr) (!is_global_space(addr))
65 extern void clear_page(void *to
);
66 extern void copy_page(void *to
, void *from
);
68 #define clear_user_page(page, vaddr, pg) clear_page(page)
69 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
72 * These are used to make use of C type-checking..
74 typedef struct { unsigned long pte
; } pte_t
;
75 typedef struct { unsigned long pgd
; } pgd_t
;
76 typedef struct { unsigned long pgprot
; } pgprot_t
;
77 typedef struct page
*pgtable_t
;
79 #define pte_val(x) ((x).pte)
80 #define pgd_val(x) ((x).pgd)
81 #define pgprot_val(x) ((x).pgprot)
83 #define __pte(x) ((pte_t) { (x) })
84 #define __pgd(x) ((pgd_t) { (x) })
85 #define __pgprot(x) ((pgprot_t) { (x) })
87 /* The kernel must now ALWAYS live at either 0xC0000000 or 0x40000000 - that
88 * being either global or local space.
90 #define PAGE_OFFSET (CONFIG_PAGE_OFFSET)
92 #if PAGE_OFFSET >= LINGLOBAL_BASE
93 #define META_MEMORY_BASE LINGLOBAL_BASE
94 #define META_MEMORY_LIMIT LINGLOBAL_LIMIT
96 #define META_MEMORY_BASE LINLOCAL_BASE
97 #define META_MEMORY_LIMIT LINLOCAL_LIMIT
100 /* Offset between physical and virtual mapping of kernel memory. */
101 extern unsigned int meta_memoffset
;
103 #define __pa(x) ((unsigned long)(((unsigned long)(x)) - meta_memoffset))
104 #define __va(x) ((void *)((unsigned long)(((unsigned long)(x)) + meta_memoffset)))
106 extern unsigned long pfn_base
;
107 #define ARCH_PFN_OFFSET (pfn_base)
108 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
109 #define page_to_virt(page) __va(page_to_pfn(page) << PAGE_SHIFT)
110 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
111 #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
112 #ifdef CONFIG_FLATMEM
113 extern unsigned long max_pfn
;
114 extern unsigned long min_low_pfn
;
115 #define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_pfn)
118 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
120 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
121 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
123 #include <asm-generic/memory_model.h>
124 #include <asm-generic/getorder.h>
126 #endif /* __ASSMEBLY__ */
128 #endif /* _METAG_PAGE_H */