tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* $Id: page.h,v 1.39 2002/02/09 19:49:31 davem Exp $ */
2
3#ifndef _SPARC64_PAGE_H
4#define _SPARC64_PAGE_H
5
6#include <linux/config.h>
7#include <asm/const.h>
8
9#if defined(CONFIG_SPARC64_PAGE_SIZE_8KB)
10#define PAGE_SHIFT 13
11#elif defined(CONFIG_SPARC64_PAGE_SIZE_64KB)
12#define PAGE_SHIFT 16
13#elif defined(CONFIG_SPARC64_PAGE_SIZE_512KB)
14#define PAGE_SHIFT 19
15#elif defined(CONFIG_SPARC64_PAGE_SIZE_4MB)
16#define PAGE_SHIFT 22
17#else
18#error No page size specified in kernel configuration
19#endif
20
21#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
22#define PAGE_MASK (~(PAGE_SIZE-1))
23
24/* Flushing for D-cache alias handling is only needed if
25 * the page size is smaller than 16K.
26 */
27#if PAGE_SHIFT < 14
28#define DCACHE_ALIASING_POSSIBLE
29#endif
30
31#ifdef __KERNEL__
32
33#if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
34#define HPAGE_SHIFT 22
35#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K)
36#define HPAGE_SHIFT 19
37#elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
38#define HPAGE_SHIFT 16
39#endif
40
41#ifdef CONFIG_HUGETLB_PAGE
42#define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT)
43#define HPAGE_MASK (~(HPAGE_SIZE - 1UL))
44#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
45#define ARCH_HAS_SETCLEAR_HUGE_PTE
46#define ARCH_HAS_HUGETLB_PREFAULT_HOOK
47#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
48#endif
49
50#ifndef __ASSEMBLY__
51
52extern void _clear_page(void *page);
53#define clear_page(X) _clear_page((void *)(X))
54struct page;
55extern void clear_user_page(void *addr, unsigned long vaddr, struct page *page);
56#define copy_page(X,Y) memcpy((void *)(X), (void *)(Y), PAGE_SIZE)
57extern void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage);
58
59/* Unlike sparc32, sparc64's parameter passing API is more
60 * sane in that structures which as small enough are passed
61 * in registers instead of on the stack. Thus, setting
62 * STRICT_MM_TYPECHECKS does not generate worse code so
63 * let's enable it to get the type checking.
64 */
65
66#define STRICT_MM_TYPECHECKS
67
68#ifdef STRICT_MM_TYPECHECKS
69/* These are used to make use of C type-checking.. */
70typedef struct { unsigned long pte; } pte_t;
71typedef struct { unsigned long iopte; } iopte_t;
72typedef struct { unsigned int pmd; } pmd_t;
73typedef struct { unsigned int pgd; } pgd_t;
74typedef struct { unsigned long pgprot; } pgprot_t;
75
76#define pte_val(x) ((x).pte)
77#define iopte_val(x) ((x).iopte)
78#define pmd_val(x) ((x).pmd)
79#define pgd_val(x) ((x).pgd)
80#define pgprot_val(x) ((x).pgprot)
81
82#define __pte(x) ((pte_t) { (x) } )
83#define __iopte(x) ((iopte_t) { (x) } )
84#define __pmd(x) ((pmd_t) { (x) } )
85#define __pgd(x) ((pgd_t) { (x) } )
86#define __pgprot(x) ((pgprot_t) { (x) } )
87
88#else
89/* .. while these make it easier on the compiler */
90typedef unsigned long pte_t;
91typedef unsigned long iopte_t;
92typedef unsigned int pmd_t;
93typedef unsigned int pgd_t;
94typedef unsigned long pgprot_t;
95
96#define pte_val(x) (x)
97#define iopte_val(x) (x)
98#define pmd_val(x) (x)
99#define pgd_val(x) (x)
100#define pgprot_val(x) (x)
101
102#define __pte(x) (x)
103#define __iopte(x) (x)
104#define __pmd(x) (x)
105#define __pgd(x) (x)
106#define __pgprot(x) (x)
107
108#endif /* (STRICT_MM_TYPECHECKS) */
109
110#define TASK_UNMAPPED_BASE (test_thread_flag(TIF_32BIT) ? \
111 (_AC(0x0000000070000000,UL)) : \
112 (_AC(0xfffff80000000000,UL) + (1UL << 32UL)))
113
114#include <asm-generic/memory_model.h>
115
116#endif /* !(__ASSEMBLY__) */
117
118/* to align the pointer to the (next) page boundary */
119#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
120
121/* We used to stick this into a hard-coded global register (%g4)
122 * but that does not make sense anymore.
123 */
124#define PAGE_OFFSET _AC(0xFFFFF80000000000,UL)
125
126#ifndef __ASSEMBLY__
127
128#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
129#define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
130
131#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
132
133#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr)>>PAGE_SHIFT)
134
135#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
136
137#define virt_to_phys __pa
138#define phys_to_virt __va
139
140#endif /* !(__ASSEMBLY__) */
141
142#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
143 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
144
145#endif /* !(__KERNEL__) */
146
147#include <asm-generic/page.h>
148
149#endif /* !(_SPARC64_PAGE_H) */