Update pte encoding macros for UML.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <[email protected]>
---
linux-2.6.git-paolo/include/asm-um/pgtable-2level.h | 15 ++++++++++----
linux-2.6.git-paolo/include/asm-um/pgtable-3level.h | 21 +++++++++++++++-----
2 files changed, 27 insertions(+), 9 deletions(-)
diff -puN include/asm-um/pgtable-2level.h~rfp-arch-uml include/asm-um/pgtable-2level.h
--- linux-2.6.git/include/asm-um/pgtable-2level.h~rfp-arch-uml 2005-08-11 11:23:21.000000000 +0200
+++ linux-2.6.git-paolo/include/asm-um/pgtable-2level.h 2005-08-11 11:23:21.000000000 +0200
@@ -72,12 +72,19 @@ static inline void set_pte(pte_t *pteptr
((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
/*
- * Bits 0 through 3 are taken
+ * Bits 0 to 5 are taken, split up the 26 bits of offset
+ * into this range:
*/
-#define PTE_FILE_MAX_BITS 28
+#define PTE_FILE_MAX_BITS 26
-#define pte_to_pgoff(pte) (pte_val(pte) >> 4)
+#define pte_to_pgoff(pte) (pte_val(pte) >> 6)
+#define pte_to_pgprot(pte) \
+ __pgprot((pte_val(pte) & (_PAGE_RW | _PAGE_PROTNONE)) \
+ | ((pte_val(pte) & _PAGE_PROTNONE) ? 0 : \
+ (_PAGE_USER | _PAGE_PRESENT)) | _PAGE_ACCESSED)
-#define pgoff_to_pte(off) ((pte_t) { ((off) << 4) + _PAGE_FILE })
+#define pgoff_prot_to_pte(off, prot) \
+ ((pte_t) { ((off) << 6) + \
+ (pgprot_val(prot) & (_PAGE_RW | _PAGE_PROTNONE)) + _PAGE_FILE })
#endif
diff -puN include/asm-um/pgtable-3level.h~rfp-arch-uml include/asm-um/pgtable-3level.h
--- linux-2.6.git/include/asm-um/pgtable-3level.h~rfp-arch-uml 2005-08-11 11:23:21.000000000 +0200
+++ linux-2.6.git-paolo/include/asm-um/pgtable-3level.h 2005-08-11 11:23:21.000000000 +0200
@@ -140,25 +140,36 @@ static inline pmd_t pfn_pmd(pfn_t page_n
}
/*
- * Bits 0 through 3 are taken in the low part of the pte,
+ * Bits 0 through 5 are taken in the low part of the pte,
* put the 32 bits of offset into the high part.
*/
#define PTE_FILE_MAX_BITS 32
+
#ifdef CONFIG_64BIT
#define pte_to_pgoff(p) ((p).pte >> 32)
-
-#define pgoff_to_pte(off) ((pte_t) { ((off) << 32) | _PAGE_FILE })
+#define pgoff_to_pte(off) ((pte_t) { ((off) << 32) | _PAGE_FILE | \
+ (pgprot_val(prot) & (_PAGE_RW | _PAGE_PROTNONE)) })
+#define pte_flags(pte) pte_val(pte)
#else
#define pte_to_pgoff(pte) ((pte).pte_high)
-
-#define pgoff_to_pte(off) ((pte_t) { _PAGE_FILE, (off) })
+#define pgoff_prot_to_pte(off, prot) ((pte_t) { \
+ (pgprot_val(prot) & (_PAGE_RW | _PAGE_PROTNONE)) | _PAGE_FILE, \
+ (off) })
+/* Don't use pte_val below, useless to join the two halves */
+#define pte_flags(pte) ((pte).pte_low)
#endif
+#define pte_to_pgprot(pte) \
+ __pgprot((pte_flags(pte) & (_PAGE_RW | _PAGE_PROTNONE)) \
+ | ((pte_flags(pte) & _PAGE_PROTNONE) ? 0 : \
+ (_PAGE_USER | _PAGE_PRESENT)) | _PAGE_ACCESSED)
+#undef pte_flags
+
#endif
/*
_
-
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