xnu-792.21.3.tar.gz

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

diff --git a/osfmk/i386/commpage/commpage.h b/osfmk/i386/commpage/commpage.h
index c16d899424fd128a452c0db5782a862018bfbe74..caa6cba68aedb11b49f6a8c50807d2dc9ee6ea70 100644 (file)
--- a/osfmk/i386/commpage/commpage.h
+++ b/osfmk/i386/commpage/commpage.h
@@ -1,16 +1,19 @@
 /*
  * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
- * 
- * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
+ * @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. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * 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
@@ -20,12 +23,61 @@
  * Please see the License for the specific language governing rights and
  * limitations under the License.
  * 
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 
 #ifndef _I386_COMMPAGE_H
 #define _I386_COMMPAGE_H
 
-/* we don't have a comm page on Intel, yet */
+#ifndef        __ASSEMBLER__
+#include <stdint.h>
+#endif /* __ASSEMBLER__ */
+
+#ifdef __ASSEMBLER__
+#include <machine/asm.h>
+
+#define        COMMPAGE_DESCRIPTOR(label,address,must,cant)    \
+L ## label ## _end:                                    ;\
+.const_data                                            ;\
+L ## label ## _size = L ## label ## _end - L ## label  ;\
+.private_extern _commpage_ ## label                    ;\
+_commpage_ ## label ## :                               ;\
+    .long      L ## label                              ;\
+    .long      L ## label ## _size                     ;\
+    .long      address                                 ;\
+    .long      must                                    ;\
+    .long      cant                                    ;\
+.text
+
+#else /* __ASSEMBLER__ */
+
+/* Each potential commpage routine is described by one of these.
+ * Note that the COMMPAGE_DESCRIPTOR macro (above), used in
+ * assembly language, must agree with this.
+ */
+ 
+typedef        struct  commpage_descriptor     {
+    void       *code_address;                                  // address of code
+    long       code_length;                                    // length in bytes
+    long       commpage_address;                               // put at this address (_COMM_PAGE_BCOPY etc)
+    long       musthave;                                       // _cpu_capability bits we must have
+    long       canthave;                                       // _cpu_capability bits we can't have
+} commpage_descriptor;
+
+
+extern char    *commPagePtr;                           // virt address of commpage in kernel map
+
+extern void    commpage_set_timestamp(uint64_t tbr,uint32_t secs,uint32_t usecs,uint32_t ticks_per_sec);
+
+typedef struct {
+       uint64_t        nt_base_tsc;
+       uint64_t        nt_base_ns; 
+       uint32_t        nt_scale;
+       uint32_t        nt_shift;
+       uint64_t        nt_check_tsc;
+} commpage_nanotime_t;
+extern  void   commpage_set_nanotime(commpage_nanotime_t *new_nanotime);
+
+#endif /* __ASSEMBLER__ */
 
 #endif /* _I386_COMMPAGE_H */