summaryrefslogtreecommitdiff
path: root/include/asm-um/pgtable.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/asm-um/pgtable.h')
-rw-r--r--include/asm-um/pgtable.h68
1 files changed, 61 insertions, 7 deletions
diff --git a/include/asm-um/pgtable.h b/include/asm-um/pgtable.h
index a88040920311..ed06170e0edd 100644
--- a/include/asm-um/pgtable.h
+++ b/include/asm-um/pgtable.h
@@ -16,13 +16,15 @@
#define _PAGE_PRESENT 0x001
#define _PAGE_NEWPAGE 0x002
-#define _PAGE_NEWPROT 0x004
-#define _PAGE_FILE 0x008 /* set:pagecache unset:swap */
-#define _PAGE_PROTNONE 0x010 /* If not present */
+#define _PAGE_NEWPROT 0x004
#define _PAGE_RW 0x020
#define _PAGE_USER 0x040
#define _PAGE_ACCESSED 0x080
#define _PAGE_DIRTY 0x100
+/* If _PAGE_PRESENT is clear, we use these: */
+#define _PAGE_FILE 0x008 /* nonlinear file mapping, saved PTE; unset:swap */
+#define _PAGE_PROTNONE 0x010 /* if the user mapped it with PROT_NONE;
+ pte_present gives true */
#ifdef CONFIG_3_LEVEL_PGTABLES
#include "asm/pgtable-3level.h"
@@ -151,10 +153,24 @@ extern unsigned long pg0[1024];
#define pmd_page(pmd) phys_to_page(pmd_val(pmd) & PAGE_MASK)
+#define pte_page(x) pfn_to_page(pte_pfn(x))
#define pte_address(x) (__va(pte_val(x) & PAGE_MASK))
#define mk_phys(a, r) ((a) + (((unsigned long) r) << REGION_SHIFT))
#define phys_addr(p) ((p) & ~REGION_MASK)
+#define pte_present(x) pte_get_bits(x, (_PAGE_PRESENT | _PAGE_PROTNONE))
+
+/*
+ * =================================
+ * Flags checking section.
+ * =================================
+ */
+
+static inline int pte_none(pte_t pte)
+{
+ return pte_is_zero(pte);
+}
+
/*
* The following only work if pte_present() is true.
* Undefined behaviour if not..
@@ -210,6 +226,18 @@ static inline int pte_newprot(pte_t pte)
return(pte_present(pte) && (pte_get_bits(pte, _PAGE_NEWPROT)));
}
+/*
+ * =================================
+ * Flags setting section.
+ * =================================
+ */
+
+static inline pte_t pte_mknewprot(pte_t pte)
+{
+ pte_set_bits(pte, _PAGE_NEWPROT);
+ return(pte);
+}
+
static inline pte_t pte_rdprotect(pte_t pte)
{
pte_clear_bits(pte, _PAGE_USER);
@@ -278,14 +306,42 @@ static inline pte_t pte_mkuptodate(pte_t pte)
return(pte);
}
-extern phys_t page_to_phys(struct page *page);
+static inline pte_t pte_mknewpage(pte_t pte)
+{
+ pte_set_bits(pte, _PAGE_NEWPAGE);
+ return(pte);
+}
+
+static inline void set_pte(pte_t *pteptr, pte_t pteval)
+{
+ pte_copy(*pteptr, pteval);
+
+ /* If it's a swap entry, it needs to be marked _PAGE_NEWPAGE so
+ * fix_range knows to unmap it. _PAGE_NEWPROT is specific to
+ * mapped pages.
+ */
+
+ *pteptr = pte_mknewpage(*pteptr);
+ if(pte_present(*pteptr)) *pteptr = pte_mknewprot(*pteptr);
+}
+#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
/*
* Conversion functions: convert a page and protection to a page entry,
* and a page entry and page directory to the page they refer to.
*/
-extern pte_t mk_pte(struct page *page, pgprot_t pgprot);
+#define phys_to_page(phys) pfn_to_page(phys_to_pfn(phys))
+#define __virt_to_page(virt) phys_to_page(__pa(virt))
+#define page_to_phys(page) pfn_to_phys(page_to_pfn(page))
+
+#define mk_pte(page, pgprot) \
+ ({ pte_t pte; \
+ \
+ pte_set_val(pte, page_to_phys(page), (pgprot)); \
+ if (pte_present(pte)) \
+ pte_mknewprot(pte_mknewpage(pte)); \
+ pte;})
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
{
@@ -362,8 +418,6 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
#endif
#endif
-extern struct page *phys_to_page(const unsigned long phys);
-extern struct page *__virt_to_page(const unsigned long virt);
#define virt_to_page(addr) __virt_to_page((const unsigned long) addr)
/*