add pfn_pte() etc for 2.5.15

PATCH New Peter Chubb 1 participant 1 message May 16, 2002

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Peter Chubb

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2002-05-16 07:58 UTC #0 lore raw

PATCH 1/1 add pfn_pte() etc for 2.5.15

Hi,
To compile 2.5.15 the functions pfn_pte(), pte_pfn() etc., are
needed.

Appended is my attempt at defining these. It seems to work on the simulator.

# This is a BitKeeper generated patch for the following project:
# Project Name: Linux kernel tree
# This patch format is intended for GNU patch command version 2.5 or higher. # This patch includes the following deltas:
# ChangeSet 1.538 -> 1.539
# include/asm-ia64/page.h 1.6 -> 1.7
# include/asm-ia64/pgtable.h 1.12 -> 1.13
#
# The following is the BitKeeper ChangeSet Log
# --------------------------------------------
# 02/05/16 [email protected] 1.539
# Use pfn_xxx and pte_pfn functions for page table entry manipulations. # --------------------------------------------
#

include/asm-ia64/page.h +8 -1

diff -Nru a/include/asm-ia64/page.h b/include/asm-ia64/page.h
@@ -81,7 +81,7 @@
 # define virt_to_page(kaddr)	(mem_map + MAP_NR_DENSE(kaddr))
 # define page_to_phys(page)	((page - mem_map) << PAGE_SHIFT)
 #endif
-#define VALID_PAGE(page)	((page - mem_map) < max_mapnr)
+
 
 typedef union ia64_va {
 	struct {

@@ -122,6 +122,13 @@
 		order = 0;
 	return order;
 }
+
+#define pfn_to_page(pfn)	(mem_map + (pfn))
+#define page_to_pfn(page)	((unsigned long)((page) - mem_map))
+
+#define pfn_valid(pfn)		((pfn) < max_mapnr)
+#define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
+
 
 # endif /* __KERNEL__ */
 #endif /* !__ASSEMBLY__ */

include/asm-ia64/pgtable.h +8 ~~-10~~

diff -Nru a/include/asm-ia64/pgtable.h b/include/asm-ia64/pgtable.h
@@ -209,18 +209,16 @@
 /*
  * Conversion functions: convert a page and protection to a page entry,
  * and a page entry and page directory to the page they refer to.
+ * also a page-frame-number and protection to a page table entry, 
+ * and vice versa.
  */
-#define mk_pte(page,pgprot)						\
-({									\
-	pte_t __pte;							\
-									\
-	pte_val(__pte) = (page_to_phys(page)) | pgprot_val(pgprot);	\
-	__pte;								\
-})
 
-/* This takes a physical page address that is used by the remapping functions */
-#define mk_pte_phys(physpage, pgprot) \
-({ pte_t __pte; pte_val(__pte) = physpage + pgprot_val(pgprot); __pte; })
+#define pfn_pte(pfn,prot)  ({ pte_t __pte; pte_val(__pte) = ((pfn)<<PAGE_SHIFT) + pgprot_val(prot); __pte; })
+
+#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
+
+/* pte_pfn -- extract page frame number from pte */
+#define pte_pfn(pte) ((pte_val(pte) & _PFN_MASK) >>PAGE_SHIFT)
 
 #define pte_modify(_pte, newprot) \
 	(__pte((pte_val(_pte) & _PAGE_CHG_MASK) | pgprot_val(newprot)))