xnu-1699.32.7.tar.gz

[apple/xnu.git] / osfmk / i386 / i386_lowmem.h

diff --git a/osfmk/i386/i386_lowmem.h b/osfmk/i386/i386_lowmem.h
index 4d0dd2e53aa6fea76136ecd6c302287de7bc15ce..1e571cd59cbcfc414091eca166a9536822c7abc6 100644 (file)
--- a/osfmk/i386/i386_lowmem.h
+++ b/osfmk/i386/i386_lowmem.h
@@ -1,31 +1,29 @@
 /*
  * Copyright (c) 2005 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
- * This file contains Original Code and/or Modifications of Original Code 
- * as defined in and that are subject to the Apple Public Source License 
- * Version 2.0 (the 'License'). You may not use this file except in 
- * compliance with the License.  The rights granted to you under the 
- * License may not be used to create, or enable the creation or 
- * redistribution of, unlawful or unlicensed copies of an Apple operating 
- * system, or to circumvent, violate, or enable the circumvention or 
- * violation of, any terms of an Apple operating system software license 
- * agreement.
- *
- * Please obtain a copy of the License at 
- * http://www.opensource.apple.com/apsl/ and read it before using this 
- * file.
- *
- * The Original Code and all software distributed under the License are 
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
- * Please see the License for the specific language governing rights and 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ * 
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
  * limitations under the License.
- *
- * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
+ * 
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 
 #ifndef _I386_LOWMEM_H_
@@ -34,10 +32,23 @@
 
 #ifdef __APPLE_API_PRIVATE
 
-#define I386_LOWMEM_RESERVED       0x18
+/* The kernel is linked at VM_MIN_KERNEL_ADDRESS + 0x100000 */
+#define I386_KERNEL_IMAGE_BASE_PAGE    0x100
+
+#if defined(__i386__)
+#define I386_LOWMEM_RESERVED           0x18
 
-#define I386_HIB_PAGETABLE         0x13
-#define I386_HIB_PAGETABLE_COUNT    5
+#define I386_HIB_PAGETABLE             0x13
+#define I386_HIB_PAGETABLE_COUNT       5
+
+#elif defined(__x86_64__)
+/* For K64, only 3 pages are reserved
+ * - physical page zero, a gap page, and then real-mode-bootstrap/lowGlo.
+ * Note that the kernel virtual address 0xffffff8000002000 is re-mapped
+ * to the low globals and that physical page, 0x2000, is used by the bootstrap.
+ */
+#define I386_LOWMEM_RESERVED           3
+#endif
 
 #endif /* __APPLE_API_PRIVATE */