microblaze: Highmem support

The first highmem implementation.

Signed-off-by: Michal Simek <monstr@monstr.eu>

arch/microblaze/include/asm/fixmap.h

@@ -21,6 +21,10 @@
 #ifndef __ASSEMBLY__
 #include <linux/kernel.h>
 #include <asm/page.h>
+#ifdef CONFIG_HIGHMEM
+#include <linux/threads.h>
+#include <asm/kmap_types.h>
+#endif
 
 #define FIXADDR_TOP	((unsigned long)(-PAGE_SIZE))
 
@@ -44,6 +48,10 @@
  */
 enum fixed_addresses {
 	FIX_HOLE,
+#ifdef CONFIG_HIGHMEM
+	FIX_KMAP_BEGIN,	/* reserved pte's for temporary kernel mappings */
+	FIX_KMAP_END = FIX_KMAP_BEGIN + (KM_TYPE_NR * num_possible_cpus()) - 1,
+#endif
 	__end_of_fixed_addresses
 };