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Merge tag 'cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm...
[linux-2.6-block.git] / arch / m68k / include / asm / sun3_pgtable.h
CommitLineData
1da177e4
LT		 1#ifndef _SUN3_PGTABLE_H
2#define _SUN3_PGTABLE_H
3
4#include <asm/sun3mmu.h>
5
6#ifndef __ASSEMBLY__
7#include <asm/virtconvert.h>
8#include <linux/linkage.h>
9
10/*
11 * This file contains all the things which change drastically for the sun3
12 * pagetable stuff, to avoid making too much of a mess of the generic m68k
13 * `pgtable.h'; this should only be included from the generic file. --m
14 */
15
16/* For virtual address to physical address conversion */
17#define VTOP(addr) __pa(addr)
18#define PTOV(addr) __va(addr)
19
20
21#endif /* !__ASSEMBLY__ */
22
23/* These need to be defined for compatibility although the sun3 doesn't use them */
24#define _PAGE_NOCACHE030 0x040
25#define _CACHEMASK040 (~0x060)
26#define _PAGE_NOCACHE_S 0x040
27
28/* Page protection values within PTE. */
29#define SUN3_PAGE_VALID (0x80000000)
30#define SUN3_PAGE_WRITEABLE (0x40000000)
31#define SUN3_PAGE_SYSTEM (0x20000000)
32#define SUN3_PAGE_NOCACHE (0x10000000)
33#define SUN3_PAGE_ACCESSED (0x02000000)
34#define SUN3_PAGE_MODIFIED (0x01000000)
35
36
37/* Externally used page protection values. */
38#define _PAGE_PRESENT (SUN3_PAGE_VALID)
39#define _PAGE_ACCESSED (SUN3_PAGE_ACCESSED)
40
1da177e4
LT		 41/* Compound page protection values. */
42//todo: work out which ones *should* have SUN3_PAGE_NOCACHE and fix...
43// is it just PAGE_KERNEL and PAGE_SHARED?
44#define PAGE_NONE __pgprot(SUN3_PAGE_VALID \
45 | SUN3_PAGE_ACCESSED \
46 | SUN3_PAGE_NOCACHE)
47#define PAGE_SHARED __pgprot(SUN3_PAGE_VALID \
48 | SUN3_PAGE_WRITEABLE \
49 | SUN3_PAGE_ACCESSED \
50 | SUN3_PAGE_NOCACHE)
51#define PAGE_COPY __pgprot(SUN3_PAGE_VALID \
52 | SUN3_PAGE_ACCESSED \
53 | SUN3_PAGE_NOCACHE)
54#define PAGE_READONLY __pgprot(SUN3_PAGE_VALID \
55 | SUN3_PAGE_ACCESSED \
56 | SUN3_PAGE_NOCACHE)
57#define PAGE_KERNEL __pgprot(SUN3_PAGE_VALID \
58 | SUN3_PAGE_WRITEABLE \
59 | SUN3_PAGE_SYSTEM \
60 | SUN3_PAGE_NOCACHE \
61 | SUN3_PAGE_ACCESSED \
62 | SUN3_PAGE_MODIFIED)
63#define PAGE_INIT __pgprot(SUN3_PAGE_VALID \
64 | SUN3_PAGE_WRITEABLE \
65 | SUN3_PAGE_SYSTEM \
66 | SUN3_PAGE_NOCACHE)
67
68/*
69 * Page protections for initialising protection_map. The sun3 has only two
70 * protection settings, valid (implying read and execute) and writeable. These
71 * are as close as we can get...
72 */
73#define __P000 PAGE_NONE
74#define __P001 PAGE_READONLY
75#define __P010 PAGE_COPY
76#define __P011 PAGE_COPY
77#define __P100 PAGE_READONLY
78#define __P101 PAGE_READONLY
79#define __P110 PAGE_COPY
80#define __P111 PAGE_COPY
81
82#define __S000 PAGE_NONE
83#define __S001 PAGE_READONLY
84#define __S010 PAGE_SHARED
85#define __S011 PAGE_SHARED
86#define __S100 PAGE_READONLY
87#define __S101 PAGE_READONLY
88#define __S110 PAGE_SHARED
89#define __S111 PAGE_SHARED
90
91/* Use these fake page-protections on PMDs. */
92#define SUN3_PMD_VALID (0x00000001)
93#define SUN3_PMD_MASK (0x0000003F)
94#define SUN3_PMD_MAGIC (0x0000002B)
95
96#ifndef __ASSEMBLY__
97
98/*
99 * Conversion functions: convert a page and protection to a page entry,
100 * and a page entry and page directory to the page they refer to.
101 */
102#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
103
104static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
105{
106 pte_val(pte) = (pte_val(pte) & SUN3_PAGE_CHG_MASK) | pgprot_val(newprot);
107 return pte;
108}
109
110#define pmd_set(pmdp,ptep) do {} while (0)
111
112static inline void pgd_set(pgd_t *pgdp, pmd_t *pmdp)
113{
114 pgd_val(*pgdp) = virt_to_phys(pmdp);
115}
116
117#define __pte_page(pte) \
118((unsigned long) __va ((pte_val (pte) & SUN3_PAGE_PGNUM_MASK) << PAGE_SHIFT))
119#define __pmd_page(pmd) \
120((unsigned long) __va (pmd_val (pmd) & PAGE_MASK))
121
122static inline int pte_none (pte_t pte) { return !pte_val (pte); }
123static inline int pte_present (pte_t pte) { return pte_val (pte) & SUN3_PAGE_VALID; }
124static inline void pte_clear (struct mm_struct *mm, unsigned long addr, pte_t *ptep)
125{
126 pte_val (*ptep) = 0;
127}
128
129#define pte_pfn(pte) (pte_val(pte) & SUN3_PAGE_PGNUM_MASK)
130#define pfn_pte(pfn, pgprot) \
131({ pte_t __pte; pte_val(__pte) = pfn | pgprot_val(pgprot); __pte; })
132
12d810c1
RZ		 133#define pte_page(pte) virt_to_page(__pte_page(pte))
134#define pmd_page(pmd) virt_to_page(__pmd_page(pmd))
1da177e4
LT		 135
136
137static inline int pmd_none2 (pmd_t *pmd) { return !pmd_val (*pmd); }
138#define pmd_none(pmd) pmd_none2(&(pmd))
139//static inline int pmd_bad (pmd_t pmd) { return (pmd_val (pmd) & SUN3_PMD_MASK) != SUN3_PMD_MAGIC; }
140static inline int pmd_bad2 (pmd_t *pmd) { return 0; }
141#define pmd_bad(pmd) pmd_bad2(&(pmd))
142static inline int pmd_present2 (pmd_t *pmd) { return pmd_val (*pmd) & SUN3_PMD_VALID; }
143/* #define pmd_present(pmd) pmd_present2(&(pmd)) */
144#define pmd_present(pmd) (!pmd_none2(&(pmd)))
145static inline void pmd_clear (pmd_t *pmdp) { pmd_val (*pmdp) = 0; }
146
147static inline int pgd_none (pgd_t pgd) { return 0; }
148static inline int pgd_bad (pgd_t pgd) { return 0; }
149static inline int pgd_present (pgd_t pgd) { return 1; }
150static inline void pgd_clear (pgd_t *pgdp) {}
151
152
153#define pte_ERROR(e) \
154 printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
155#define pmd_ERROR(e) \
156 printk("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e))
157#define pgd_ERROR(e) \
158 printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
159
160
161/*
162 * The following only work if pte_present() is true.
163 * Undefined behaviour if not...
164 * [we have the full set here even if they don't change from m68k]
165 */
1da177e4 166static inline int pte_write(pte_t pte) { return pte_val(pte) & SUN3_PAGE_WRITEABLE; }
1da177e4
LT		 167static inline int pte_dirty(pte_t pte) { return pte_val(pte) & SUN3_PAGE_MODIFIED; }
168static inline int pte_young(pte_t pte) { return pte_val(pte) & SUN3_PAGE_ACCESSED; }
7e675137 169static inline int pte_special(pte_t pte) { return 0; }
1da177e4
LT		 170
171static inline pte_t pte_wrprotect(pte_t pte) { pte_val(pte) &= ~SUN3_PAGE_WRITEABLE; return pte; }
1da177e4
LT		 172static inline pte_t pte_mkclean(pte_t pte) { pte_val(pte) &= ~SUN3_PAGE_MODIFIED; return pte; }
173static inline pte_t pte_mkold(pte_t pte) { pte_val(pte) &= ~SUN3_PAGE_ACCESSED; return pte; }
174static inline pte_t pte_mkwrite(pte_t pte) { pte_val(pte) |= SUN3_PAGE_WRITEABLE; return pte; }
1da177e4
LT		 175static inline pte_t pte_mkdirty(pte_t pte) { pte_val(pte) |= SUN3_PAGE_MODIFIED; return pte; }
176static inline pte_t pte_mkyoung(pte_t pte) { pte_val(pte) |= SUN3_PAGE_ACCESSED; return pte; }
177static inline pte_t pte_mknocache(pte_t pte) { pte_val(pte) |= SUN3_PAGE_NOCACHE; return pte; }
178// use this version when caches work...
179//static inline pte_t pte_mkcache(pte_t pte) { pte_val(pte) &= SUN3_PAGE_NOCACHE; return pte; }
180// until then, use:
181static inline pte_t pte_mkcache(pte_t pte) { return pte; }
7e675137 182static inline pte_t pte_mkspecial(pte_t pte) { return pte; }
1da177e4
LT		 183
184extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
185extern pgd_t kernel_pg_dir[PTRS_PER_PGD];
186
187/* Find an entry in a pagetable directory. */
188#define pgd_index(address) ((address) >> PGDIR_SHIFT)
189
190#define pgd_offset(mm, address) \
191((mm)->pgd + pgd_index(address))
192
193/* Find an entry in a kernel pagetable directory. */
194#define pgd_offset_k(address) pgd_offset(&init_mm, address)
195
196/* Find an entry in the second-level pagetable. */
197static inline pmd_t *pmd_offset (pgd_t *pgd, unsigned long address)
198{
199 return (pmd_t *) pgd;
200}
201
1da177e4
LT		 202/* Find an entry in the third-level pagetable. */
203#define pte_index(address) ((address >> PAGE_SHIFT) & (PTRS_PER_PTE-1))
204#define pte_offset_kernel(pmd, address) ((pte_t *) __pmd_page(*pmd) + pte_index(address))
0eefed84
GU		 205#define pte_offset_map(pmd, address) ((pte_t *)page_address(pmd_page(*pmd)) + pte_index(address))
206#define pte_unmap(pte) do { } while (0)
1da177e4
LT		 207
208/* Macros to (de)construct the fake PTEs representing swap pages. */
209#define __swp_type(x) ((x).val & 0x7F)
210#define __swp_offset(x) (((x).val) >> 7)
211#define __swp_entry(type,offset) ((swp_entry_t) { ((type) | ((offset) << 7)) })
212#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
213#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
214
215#endif /* !__ASSEMBLY__ */
216#endif /* !_SUN3_PGTABLE_H */
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