Changeset 567807b1 in mainline for generic/include

Timestamp:

2006-05-24T17:03:29Z (20 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

8d6bc2d5

Parents:

82da5f5

Message:

Modify the hierarchy of page fault handlers to pass access mode that caused the fault.
Architectures are required to pass either PF_ACCESS_READ, PF_ACCESS_WRITE or PF_ACCESS_EXEC
to as_page_fault(), depending on the cause of the fault.

Location:

generic/include/mm

Files:

• as.h (modified) (2 diffs)
• page.h (modified) (1 diff)

generic/include/mm/as.h

@@ -128 +128 @@
 /** Address space area backend structure. */
 struct mem_backend {
-        int (* backend_page_fault)(as_area_t *area, __address addr);
+        int (* backend_page_fault)(as_area_t *area, __address addr, pf_access_t access);
         void (* backend_frame_free)(as_area_t *area, __address page, __address frame);
 };
@@ -146 +146 @@
 extern int as_area_get_flags(as_area_t *area);
 extern void as_set_mapping(as_t *as, __address page, __address frame);
-extern int as_page_fault(__address page, istate_t *istate);
+extern int as_page_fault(__address page, pf_access_t access, istate_t *istate);
 extern void as_switch(as_t *old, as_t *new);
 extern void as_free(as_t *as);

generic/include/mm/page.h

@@ -61 +61 @@
 #define PAGE_GLOBAL             (1<<PAGE_GLOBAL_SHIFT)
 
+/** Page fault access type. */
+enum pf_access {
+        PF_ACCESS_READ,
+        PF_ACCESS_WRITE,
+        PF_ACCESS_EXEC
+};
+typedef enum pf_access pf_access_t;
+
 /** Operations to manipulate page mappings. */
 struct page_mapping_operations {