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authorSergei Shtylyov <sshtylyov@ru.mvista.com>2006-05-27 14:39:39 -0400
committerRalf Baechle <ralf@linux-mips.org>2006-06-05 19:15:18 -0400
commit7cb710c9a617384cd0ed30638f3acc00125690fc (patch)
treeb73e0f3c4c2df044a049e77f4c2146af2b7327b0 /include/asm-mips/pgtable-32.h
parentaa32374aaa2e516a9b0719477efae0782a62a79e (diff)
[MIPS] Fix non-linear memory mapping on MIPS
Fix the non-linear memory mapping done via remap_file_pages() -- it didn't work on any MIPS CPU because the page offset clashing with _PAGE_FILE and some other page protection bits which should have been left zeros for this kind of pages. Signed-off-by: Konstantin Baydarov <kbaidarov@ru.mvista.com> Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'include/asm-mips/pgtable-32.h')
-rw-r--r--include/asm-mips/pgtable-32.h45
1 files changed, 26 insertions, 19 deletions
diff --git a/include/asm-mips/pgtable-32.h b/include/asm-mips/pgtable-32.h
index a5ce3f17a989..087c20769256 100644
--- a/include/asm-mips/pgtable-32.h
+++ b/include/asm-mips/pgtable-32.h
@@ -177,16 +177,18 @@ pfn_pte(unsigned long pfn, pgprot_t prot)
177 ((swp_entry_t) { ((type) << 10) | ((offset) << 15) }) 177 ((swp_entry_t) { ((type) << 10) | ((offset) << 15) })
178 178
179/* 179/*
180 * Bits 0, 1, 2, 9 and 10 are taken, split up the 27 bits of offset 180 * Bits 0, 4, 8, and 9 are taken, split up 28 bits of offset into this range:
181 * into this range:
182 */ 181 */
183#define PTE_FILE_MAX_BITS 27 182#define PTE_FILE_MAX_BITS 28
184 183
185#define pte_to_pgoff(_pte) \ 184#define pte_to_pgoff(_pte) ((((_pte).pte >> 1 ) & 0x07) | \
186 ((((_pte).pte >> 3) & 0x3f ) + (((_pte).pte >> 11) << 8 )) 185 (((_pte).pte >> 2 ) & 0x38) | \
186 (((_pte).pte >> 10) << 6 ))
187 187
188#define pgoff_to_pte(off) \ 188#define pgoff_to_pte(off) ((pte_t) { (((off) & 0x07) << 1 ) | \
189 ((pte_t) { (((off) & 0x3f) << 3) + (((off) >> 8) << 11) + _PAGE_FILE }) 189 (((off) & 0x38) << 2 ) | \
190 (((off) >> 6 ) << 10) | \
191 _PAGE_FILE })
190 192
191#else 193#else
192 194
@@ -203,24 +205,29 @@ pfn_pte(unsigned long pfn, pgprot_t prot)
203 ((swp_entry_t) { ((type) << 8) | ((offset) << 13) }) 205 ((swp_entry_t) { ((type) << 8) | ((offset) << 13) })
204#endif /* defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32) */ 206#endif /* defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32) */
205 207
208#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32)
206/* 209/*
207 * Bits 0, 1, 2, 7 and 8 are taken, split up the 27 bits of offset 210 * Bits 0 and 1 of pte_high are taken, use the rest for the page offset...
208 * into this range:
209 */ 211 */
210#define PTE_FILE_MAX_BITS 27 212#define PTE_FILE_MAX_BITS 30
211 213
212#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32_R1) 214#define pte_to_pgoff(_pte) ((_pte).pte_high >> 2)
213 /* fixme */ 215#define pgoff_to_pte(off) ((pte_t) { _PAGE_FILE, (off) << 2 })
214#define pte_to_pgoff(_pte) (((_pte).pte_high >> 6) + ((_pte).pte_high & 0x3f))
215#define pgoff_to_pte(off) \
216 ((pte_t){(((off) & 0x3f) + ((off) << 6) + _PAGE_FILE)})
217 216
218#else 217#else
219#define pte_to_pgoff(_pte) \ 218/*
220 ((((_pte).pte >> 3) & 0x1f ) + (((_pte).pte >> 9) << 6 )) 219 * Bits 0, 4, 6, and 7 are taken, split up 28 bits of offset into this range:
220 */
221#define PTE_FILE_MAX_BITS 28
222
223#define pte_to_pgoff(_pte) ((((_pte).pte >> 1) & 0x7) | \
224 (((_pte).pte >> 2) & 0x8) | \
225 (((_pte).pte >> 8) << 4))
221 226
222#define pgoff_to_pte(off) \ 227#define pgoff_to_pte(off) ((pte_t) { (((off) & 0x7) << 1) | \
223 ((pte_t) { (((off) & 0x1f) << 3) + (((off) >> 6) << 9) + _PAGE_FILE }) 228 (((off) & 0x8) << 2) | \
229 (((off) >> 4) << 8) | \
230 _PAGE_FILE })
224#endif 231#endif
225 232
226#endif 233#endif