microblaze: Support 4k/16k/64k pages

Add support for page size which is supported by MMU. Remove 8k and 32k page size because they are not supported by MMU. Signed-off-by: Michal Simek <monstr@monstr.eu>
mariux64 · Oct 4, 2012 · 6e80cff · 6e80cff
1 parent 9f78d3b
commit 6e80cff
Show file tree

Hide file tree

Showing 3 changed files with 10 additions and 9 deletions.
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
@@ -243,14 +243,11 @@ choice
 config MICROBLAZE_4K_PAGES
 	bool "4k page size"
 
-config MICROBLAZE_8K_PAGES
-	bool "8k page size"
-
 config MICROBLAZE_16K_PAGES
 	bool "16k page size"
 
-config MICROBLAZE_32K_PAGES
-	bool "32k page size"
+config MICROBLAZE_64K_PAGES
+	bool "64k page size"
 
 endchoice
 

diff --git a/arch/microblaze/include/asm/page.h b/arch/microblaze/include/asm/page.h
@@ -23,12 +23,10 @@
 #ifdef __KERNEL__
 
 /* PAGE_SHIFT determines the page size */
-#if defined(CONFIG_MICROBLAZE_32K_PAGES)
-#define PAGE_SHIFT		15
+#if defined(CONFIG_MICROBLAZE_64K_PAGES)
+#define PAGE_SHIFT		16
 #elif defined(CONFIG_MICROBLAZE_16K_PAGES)
 #define PAGE_SHIFT		14
-#elif defined(CONFIG_MICROBLAZE_8K_PAGES)
-#define PAGE_SHIFT		13
 #else
 #define PAGE_SHIFT		12
 #endif

diff --git a/arch/microblaze/kernel/hw_exception_handler.S b/arch/microblaze/kernel/hw_exception_handler.S
@@ -862,7 +862,13 @@ ex_handler_done:
 		 * bits 20 and 21 are zero.
 		 */
 		andi	r3, r3, PAGE_MASK
+#ifdef CONFIG_MICROBLAZE_64K_PAGES
+		ori	r3, r3, TLB_VALID | TLB_PAGESZ(PAGESZ_64K)
+#elif CONFIG_MICROBLAZE_16K_PAGES
+		ori	r3, r3, TLB_VALID | TLB_PAGESZ(PAGESZ_16K)
+#else
 		ori	r3, r3, TLB_VALID | TLB_PAGESZ(PAGESZ_4K)
+#endif
 		mts	rtlbhi,	r3		/* Load TLB HI */
 		nop