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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _PPC_PAGE_H
2#define _PPC_PAGE_H
3
Benjamin Herrenschmidta7f290d2005-11-11 21:15:21 +11004#include <asm/asm-compat.h>
5
Linus Torvalds1da177e2005-04-16 15:20:36 -07006/* PAGE_SHIFT determines the page size */
7#define PAGE_SHIFT 12
Benjamin Herrenschmidta7f290d2005-11-11 21:15:21 +11008#define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT)
Linus Torvalds1da177e2005-04-16 15:20:36 -07009
10/*
11 * Subtle: this is an int (not an unsigned long) and so it
12 * gets extended to 64 bits the way want (i.e. with 1s). -- paulus
13 */
14#define PAGE_MASK (~((1 << PAGE_SHIFT) - 1))
15
16#ifdef __KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -070017
18/* This must match what is in arch/ppc/Makefile */
19#define PAGE_OFFSET CONFIG_KERNEL_START
20#define KERNELBASE PAGE_OFFSET
Paul Mackerrase4de0022006-05-09 16:00:59 +100021#define is_kernel_addr(x) ((x) >= PAGE_OFFSET)
Linus Torvalds1da177e2005-04-16 15:20:36 -070022
23#ifndef __ASSEMBLY__
24
25/*
26 * The basic type of a PTE - 64 bits for those CPUs with > 32 bit
27 * physical addressing. For now this just the IBM PPC440.
28 */
29#ifdef CONFIG_PTE_64BIT
30typedef unsigned long long pte_basic_t;
31#define PTE_SHIFT (PAGE_SHIFT - 3) /* 512 ptes per page */
32#define PTE_FMT "%16Lx"
33#else
34typedef unsigned long pte_basic_t;
35#define PTE_SHIFT (PAGE_SHIFT - 2) /* 1024 ptes per page */
36#define PTE_FMT "%.8lx"
37#endif
38
Paul Mackerras7c8c6b92005-10-06 12:23:33 +100039/* align addr on a size boundary - adjust address up/down if needed */
40#define _ALIGN_UP(addr,size) (((addr)+((size)-1))&(~((size)-1)))
41#define _ALIGN_DOWN(addr,size) ((addr)&(~((size)-1)))
42
43/* align addr on a size boundary - adjust address up if needed */
44#define _ALIGN(addr,size) _ALIGN_UP(addr,size)
45
46/* to align the pointer to the (next) page boundary */
47#define PAGE_ALIGN(addr) _ALIGN(addr, PAGE_SIZE)
48
49
Linus Torvalds1da177e2005-04-16 15:20:36 -070050#undef STRICT_MM_TYPECHECKS
51
52#ifdef STRICT_MM_TYPECHECKS
53/*
54 * These are used to make use of C type-checking..
55 */
56typedef struct { pte_basic_t pte; } pte_t;
57typedef struct { unsigned long pmd; } pmd_t;
58typedef struct { unsigned long pgd; } pgd_t;
59typedef struct { unsigned long pgprot; } pgprot_t;
60
61#define pte_val(x) ((x).pte)
62#define pmd_val(x) ((x).pmd)
63#define pgd_val(x) ((x).pgd)
64#define pgprot_val(x) ((x).pgprot)
65
66#define __pte(x) ((pte_t) { (x) } )
67#define __pmd(x) ((pmd_t) { (x) } )
68#define __pgd(x) ((pgd_t) { (x) } )
69#define __pgprot(x) ((pgprot_t) { (x) } )
70
71#else
72/*
73 * .. while these make it easier on the compiler
74 */
75typedef pte_basic_t pte_t;
76typedef unsigned long pmd_t;
77typedef unsigned long pgd_t;
78typedef unsigned long pgprot_t;
79
80#define pte_val(x) (x)
81#define pmd_val(x) (x)
82#define pgd_val(x) (x)
83#define pgprot_val(x) (x)
84
85#define __pte(x) (x)
86#define __pmd(x) (x)
87#define __pgd(x) (x)
88#define __pgprot(x) (x)
89
90#endif
91
Linus Torvalds1da177e2005-04-16 15:20:36 -070092struct page;
93extern void clear_pages(void *page, int order);
94static inline void clear_page(void *page) { clear_pages(page, 0); }
95extern void copy_page(void *to, void *from);
96extern void clear_user_page(void *page, unsigned long vaddr, struct page *pg);
97extern void copy_user_page(void *to, void *from, unsigned long vaddr,
98 struct page *pg);
99
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100#define PPC_MEMSTART 0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101#define PPC_MEMOFFSET PAGE_OFFSET
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103#define ___pa(vaddr) ((vaddr)-PPC_MEMOFFSET)
104#define ___va(paddr) ((paddr)+PPC_MEMOFFSET)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105
106extern int page_is_ram(unsigned long pfn);
107
108#define __pa(x) ___pa((unsigned long)(x))
109#define __va(x) ((void *)(___va((unsigned long)(x))))
110
Adrian Bunke6b6e3f2007-08-27 23:29:53 +0200111#define ARCH_PFN_OFFSET 0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
113#define page_to_virt(page) __va(page_to_pfn(page) << PAGE_SHIFT)
114
Adrian Bunke6b6e3f2007-08-27 23:29:53 +0200115#define pfn_valid(pfn) ((pfn) < max_mapnr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
117
118/* Pure 2^n version of get_order */
119extern __inline__ int get_order(unsigned long size)
120{
121 int lz;
122
123 size = (size-1) >> PAGE_SHIFT;
124 asm ("cntlzw %0,%1" : "=r" (lz) : "r" (size));
125 return 32 - lz;
126}
127
128#endif /* __ASSEMBLY__ */
129
130#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
131 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
132
Adrian Bunkb3c2ffd2006-06-30 18:20:44 +0200133/* We do define AT_SYSINFO_EHDR but don't use the gate mechanism */
Benjamin Herrenschmidta7f290d2005-11-11 21:15:21 +1100134#define __HAVE_ARCH_GATE_AREA 1
135
KAMEZAWA Hiroyukif68d4c92006-03-27 01:15:44 -0800136#include <asm-generic/memory_model.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137#endif /* __KERNEL__ */
138#endif /* _PPC_PAGE_H */