patch-2.4.0-test7 linux/include/asm-ia64/pgtable.h

• Lines: 19
• Date: Sun Aug 13 10:17:16 2000
• Orig file: v2.4.0-test6/linux/include/asm-ia64/pgtable.h
• Orig date: Wed Aug 9 19:19:51 2000

diff -u --recursive --new-file v2.4.0-test6/linux/include/asm-ia64/pgtable.h linux/include/asm-ia64/pgtable.h
@@ -286,7 +286,17 @@
  * contains the memory attribute bits, dirty bits, and various other
  * bits as well.
  */
-#define pgprot_noncached(prot)	__pgprot((pgprot_val(prot) & ~_PAGE_MA_MASK) | _PAGE_MA_UC)
+#define pgprot_noncached(prot)		__pgprot((pgprot_val(prot) & ~_PAGE_MA_MASK) | _PAGE_MA_UC)
+
+/*
+ * Macro to make mark a page protection value as "write-combining".
+ * Note that "protection" is really a misnomer here as the protection
+ * value contains the memory attribute bits, dirty bits, and various
+ * other bits as well.  Accesses through a write-combining translation
+ * works bypasses the caches, but does allow for consecutive writes to
+ * be combined into single (but larger) write transactions.
+ */
+#define pgprot_writecombine(prot)	__pgprot((pgprot_val(prot) & ~_PAGE_MA_MASK) | _PAGE_MA_WC)
 
 /*
  * Return the region index for virtual address ADDRESS.