Changeset 730ff63 in mainline for kernel/arch/sparc64/include

Timestamp:

2013-09-03T19:13:37Z (12 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

b3cf946

Parents:

1b34360

Message:

Do not create kernel identity over the entire address space on sun4v.

Location:

kernel/arch/sparc64/include/arch

Files:

• mm/frame.h (modified) (1 diff)
• mm/sun4u/frame.h (modified) (1 diff)
• mm/sun4v/frame.h (modified) (1 diff)
• trap/sun4v/mmu.h (modified) (1 diff)

kernel/arch/sparc64/include/arch/mm/frame.h

@@ -46 +46 @@
 #endif
 
+#ifndef __ASM__
+
+#include <typedefs.h>
+
+extern uintptr_t end_of_identity;
+
+extern void frame_low_arch_init(void);
+extern void frame_high_arch_init(void);
+#define physmem_print()
+
+#endif
+
 #endif
 

kernel/arch/sparc64/include/arch/mm/sun4u/frame.h

@@ -72 +72 @@
 typedef union frame_address frame_address_t;
 
-extern uintptr_t end_of_identity;
-
-extern void frame_low_arch_init(void);
-extern void frame_high_arch_init(void);
-#define physmem_print()
-
 #endif
 

kernel/arch/sparc64/include/arch/mm/sun4v/frame.h

@@ -42 +42 @@
 #define FRAME_SIZE              (1 << FRAME_WIDTH)
 
-#ifndef __ASM__
-
-#include <typedefs.h>
-
-extern void frame_low_arch_init(void);
-extern void frame_high_arch_init(void);
-#define physmem_print()
-
-#endif
-
 #endif
 

kernel/arch/sparc64/include/arch/trap/sun4v/mmu.h

@@ -102 +102 @@
         nop
 
+        /* exclude pages beyond the end of memory from the identity mapping */
+        sethi %hi(end_of_identity), %g4
+        ldx [%g4 + %lo(end_of_identity)], %g4
+        cmp %g1, %g4
+        bgeu %xcc, 0f
+        nop
+
         /*
          * Installing the identity does not fit into 32 instructions, call