* David Mosberger-Tang <davidm@hpl.hp.com>
*/
+#include <linux/config.h>
#include <asm/mman.h>
#include <asm/page.h>
#define pte_mkhuge(pte) (__pte(pte_val(pte)))
/*
- * Make page protection values cacheable, uncacheable, or 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.
+ * Macro to a page protection value as "uncacheable". 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.
*/
-#define pgprot_cacheable(prot) __pgprot((pgprot_val(prot) & ~_PAGE_MA_MASK) | _PAGE_MA_WB)
#define pgprot_noncached(prot) __pgprot((pgprot_val(prot) & ~_PAGE_MA_MASK) | _PAGE_MA_UC)
-#define pgprot_writecombine(prot) __pgprot((pgprot_val(prot) & ~_PAGE_MA_MASK) | _PAGE_MA_WC)
-struct file;
-extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
- unsigned long size, pgprot_t vma_prot);
-#define __HAVE_PHYS_MEM_ACCESS_PROT
+/*
+ * 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)
static inline unsigned long
pgd_index (unsigned long address)