xnu-792.6.76.tar.gz

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

diff --git a/osfmk/i386/seg.h b/osfmk/i386/seg.h
index 3afe55d5daf449be3f6be2c47fa312467894ab42..b2b83c2463ad5ce502678686860c15a8c6427be5 100644 (file)
--- a/osfmk/i386/seg.h
+++ b/osfmk/i386/seg.h
@@ -1,24 +1,21 @@
 /*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
  *
  * @APPLE_LICENSE_HEADER_START@
  * 
- * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
+ * The contents of this file constitute Original Code as defined in and
+ * are subject to the Apple Public Source License Version 1.1 (the
+ * "License").  You may not use this file except in compliance with the
+ * License.  Please obtain a copy of the License at
+ * http://www.apple.com/publicsource and read it before using this file.
  * 
- * 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.
- * 
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * This 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.
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
+ * License for the specific language governing rights and limitations
+ * under the License.
  * 
  * @APPLE_LICENSE_HEADER_END@
  */
@@ -55,13 +52,66 @@
 
 #ifndef        _I386_SEG_H_
 #define        _I386_SEG_H_
+
 #include <mach_kdb.h>
+#include <stdint.h>
+#include <architecture/i386/sel.h>
 
 /*
  * i386 segmentation.
  */
 
+static inline uint16_t
+sel_to_selector(sel_t  sel)
+{
+    union {
+       sel_t           sel;
+       uint16_t        selector;
+    } tconv;
+    
+    tconv.sel = sel;
+    
+    return (tconv.selector);
+}
+
+static inline sel_t
+selector_to_sel(uint16_t selector)
+{
+    union {
+       uint16_t        selector;
+       sel_t           sel;
+    } tconv;
+    
+    tconv.selector = selector;
+    
+    return (tconv.sel);
+}
+
+#define        LDTSZ           15              /* size of the kernel ldt in entries*/
+
+#if    MACH_KDB
+#ifdef MACH_BSD
+#define        GDTSZ           14
+#else
+#define        GDTSZ           11
+#endif
+#else  /* MACH_KDB */
+#ifdef MACH_BSD
+#define        GDTSZ           13
+#else
+#define        GDTSZ           10
+#endif
+#endif /* MACH_KDB */
+
+/*
+ * Interrupt table is always 256 entries long.
+ */
+#define        IDTSZ           256
+
 #ifndef        __ASSEMBLER__
+
+#include <sys/cdefs.h>
+
 /*
  * Real segment descriptor.
  */
@@ -96,6 +146,26 @@ struct fake_descriptor {
                                                /* word count, for gate */
        unsigned int    access:8;               /* access */
 };
+
+/*
+ * Boot-time data for master (or only) CPU
+ */
+extern struct fake_descriptor  idt[IDTSZ];
+extern struct fake_descriptor  gdt[GDTSZ];
+extern struct fake_descriptor  ldt[LDTSZ];
+extern struct i386_tss         ktss;
+
+__BEGIN_DECLS
+
+#if    MACH_KDB
+extern char                    db_stack_store[];
+extern char                    db_task_stack_store[];
+extern struct i386_tss         dbtss;
+extern void                    db_task_start(void);
+#endif /* MACH_KDB */
+
+__END_DECLS
+
 #endif /*__ASSEMBLER__*/
 
 #define        SZ_32           0x4                     /* 32-bit segment */
@@ -144,7 +214,9 @@ struct fake_descriptor {
 /*
  * Convert selector to descriptor table index.
  */
-#define        sel_idx(sel)    ((sel)>>3)
+#define        sel_idx(sel)    (selector_to_sel(sel).index)
+
+#define NULL_SEG       0
 
 /*
  * User descriptors for MACH - 32-bit flat address space
@@ -153,8 +225,9 @@ struct fake_descriptor {
 #define        USER_RPC        0x0f            /* mach rpc call gate */
 #define        USER_CS         0x17            /* user code segment */
 #define        USER_DS         0x1f            /* user data segment */
-
-#define        LDTSZ           4
+#define        USER_CTHREAD    0x27            /* user cthread area */
+#define        USER_SETTABLE   0x2f            /* start of user settable ldt entries */
+#define        USLDTSZ         10              /* number of user settable entries */
 
 /*
  * Kernel descriptors for MACH - 32-bit flat address space.
@@ -175,7 +248,7 @@ struct fake_descriptor {
 #endif
 #define        USER_FPREGS     0x40            /* user-mode access to saved
                                           floating-point registers */
-#define        CPU_DATA        0x48            /* per-cpu data */
+#define        CPU_DATA_GS     0x48            /* per-cpu data */
 
 #ifdef MACH_BSD
 #define        USER_LDT        0x58
@@ -185,24 +258,6 @@ struct fake_descriptor {
 
 #if    MACH_KDB
 #define        DEBUG_TSS       0x50            /* debug TSS (uniprocessor) */
-
-#ifdef MACH_BSD
-#define        GDTSZ           14
-#else
-#define        GDTSZ           11
 #endif
-#else
-
-#ifdef MACH_BSD
-#define        GDTSZ           13
-#else
-#define        GDTSZ           10
-#endif
-#endif
-
-/*
- * Interrupt table is always 256 entries long.
- */
-#define        IDTSZ           256
 
 #endif /* _I386_SEG_H_ */