Changeset 17af882 in mainline for kernel/arch/amd64/include/arch/mm/km.h

Timestamp:

2014-06-16T11:32:05Z (10 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

2cb32f9

Parents:

334bf28

Message:

Switch the amd64 kernel (back) from 'large' to 'kernel' memory model.

• This makes the amd64 kernel 6% smaller and more comfortable to debug.
• Unlike in the original 'kernel' memory model implementation, KA2PA(PA2KA(x)) == x; for x from kernel identity.
• Memory outside of the kernel identity region continues to be available by the standard means.

File:

• kernel/arch/amd64/include/arch/mm/km.h (modified) (1 diff)

kernel/arch/amd64/include/arch/mm/km.h

@@ -38 +38 @@
 #include <typedefs.h>
 
-#define KM_AMD64_IDENTITY_START         UINT64_C(0xffff800000000000)
-#define KM_AMD64_IDENTITY_SIZE          UINT64_C(0x0000400000000000)
+#define KM_AMD64_IDENTITY_START         UINT64_C(0xffffffff80000000)
+#define KM_AMD64_IDENTITY_SIZE          UINT64_C(0x0000000080000000)
 
-#define KM_AMD64_NON_IDENTITY_START     UINT64_C(0xffffc00000000000)
-#define KM_AMD64_NON_IDENTITY_SIZE      UINT64_C(0x0000400000000000)
+#define KM_AMD64_NON_IDENTITY_START     UINT64_C(0xffff800000000000)
+#define KM_AMD64_NON_IDENTITY_SIZE      UINT64_C(0x00007fff80000000)
 
 extern void km_identity_arch_init(void);