lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[MIPS] Fix non-linear memory mapping on MIPS

Browse Source 
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>
This commit is contained in:
Sergei Shtylyov
2006-05-27 22:39:39 +04:00
committed by Ralf Baechle
parent aa32374aaa
commit 7cb710c9a6
2 changed files with 31 additions and 27 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
include/asm-mips/pgtable-64.h
View File

@@ -224,15 +224,12 @@ static inline pte_t mk_swap_pte(unsigned long type, unsigned long offset)
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
/*
* Bits 0, 1, 2, 7 and 8 are taken, split up the 32 bits of offset
* into this range:
* Bits 0, 4, 6, and 7 are taken. Let's leave bits 1, 2, 3, and 5 alone to
* make things easier, and only use the upper 56 bits for the page offset...
*/
#define PTE_FILE_MAX_BITS 32
#define PTE_FILE_MAX_BITS 56
#define pte_to_pgoff(_pte) \
((((_pte).pte >> 3) & 0x1f ) + (((_pte).pte >> 9) << 6 ))
#define pgoff_to_pte(off) \
((pte_t) { (((off) & 0x1f) << 3) + (((off) >> 6) << 9) + _PAGE_FILE })
#define pte_to_pgoff(_pte) ((_pte).pte >> 8)
#define pgoff_to_pte(off) ((pte_t) { ((off) << 8) | _PAGE_FILE })
#endif /* _ASM_PGTABLE_64_H */