WebSVN – HelenOS – Diff – /branches/network/kernel/generic/include/mm/as.h


/*
 * Copyright (C) 2001-2004 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#ifndef __AS_H__
#define __AS_H__
 
#include <arch/mm/page.h>
#include <arch/mm/as.h>
#include <arch/mm/asid.h>
#include <arch/types.h>
#include <typedefs.h>
#include <synch/spinlock.h>
#include <adt/list.h>
 
#define KERNEL_ADDRESS_SPACE_START  KERNEL_ADDRESS_SPACE_START_ARCH
#define KERNEL_ADDRESS_SPACE_END    KERNEL_ADDRESS_SPACE_END_ARCH
#define USER_ADDRESS_SPACE_START    USER_ADDRESS_SPACE_START_ARCH
#define USER_ADDRESS_SPACE_END      USER_ADDRESS_SPACE_END_ARCH
 
#define IS_KA(addr) ((addr)>=KERNEL_ADDRESS_SPACE_START && (addr)<=KERNEL_ADDRESS_SPACE_END)
 
#define UTEXT_ADDRESS   UTEXT_ADDRESS_ARCH
#define USTACK_ADDRESS  USTACK_ADDRESS_ARCH
#define UDATA_ADDRESS   UDATA_ADDRESS_ARCH
 
#define FLAG_AS_KERNEL      (1 << 0)    /**< Kernel address space. */
 
enum as_area_type {
    AS_AREA_TEXT = 1, AS_AREA_DATA, AS_AREA_STACK
};
 
/** Address space area structure.
 *
 * Each as_area_t structure describes one contiguous area of virtual memory.
 * In the future, it should not be difficult to support shared areas.
 */
struct as_area {
    SPINLOCK_DECLARE(lock);
    link_t link;
    as_area_type_t type;
    size_t size;        /**< Size of this area in multiples of PAGE_SIZE. */
    __address base;     /**< Base address of this area. */
};
 
/** Address space structure.
 *
 * as_t contains the list of as_areas of userspace accessible
 * pages for one or more tasks. Ranges of kernel memory pages are not
 * supposed to figure in the list as they are shared by all tasks and
 * set up during system initialization.
 */
struct as {
    /** Protected by asidlock. Must be acquired before as->lock. */
    link_t inactive_as_with_asid_link;
 
    SPINLOCK_DECLARE(lock);
 
    /** Number of processors on wich is this address space active. */
    count_t refcount;
 
    link_t as_area_head;
 
    /** Page table pointer. Constant on architectures that use global page hash table. */
    pte_t *page_table;
 
    /** Address space identifier. Constant on architectures that do not support ASIDs.*/
    asid_t asid;
};
 
struct as_operations {
    pte_t *(* page_table_create)(int flags);
};
typedef struct as_operations as_operations_t;
 
extern as_t *AS_KERNEL;
extern as_operations_t *as_operations;
 
extern spinlock_t as_lock;
extern link_t inactive_as_with_asid_head;
 
extern void as_init(void);
extern as_t *as_create(int flags);
extern as_area_t *as_area_create(as_t *as, as_area_type_t type, size_t size, __address base);
extern void as_set_mapping(as_t *as, __address page, __address frame);
extern int as_page_fault(__address page);
extern void as_switch(as_t *old, as_t *new);
 
/* Interface to be implemented by architectures. */
#ifndef as_install_arch
extern void as_install_arch(as_t *as);
#endif /* !def as_install_arch */
 
#endif
 

Subversion Repositories HelenOS

(root)/branches/network/kernel/generic/include/mm/as.h @ 4719 – Rev 789 → 823

Rev 789		Rev 823
1	/*	1	/*
2	* Copyright (C) 2001-2004 Jakub Jermar	2	* Copyright (C) 2001-2004 Jakub Jermar
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	#ifndef __AS_H__	29	#ifndef __AS_H__
30	#define __AS_H__	30	#define __AS_H__
31		31
32	#include <arch/mm/page.h>	32	#include <arch/mm/page.h>
33	#include <arch/mm/as.h>	33	#include <arch/mm/as.h>
34	#include <arch/mm/asid.h>	34	#include <arch/mm/asid.h>
35	#include <arch/types.h>	35	#include <arch/types.h>
36	#include <typedefs.h>	36	#include <typedefs.h>
37	#include <synch/spinlock.h>	37	#include <synch/spinlock.h>
38	#include <adt/list.h>	38	#include <adt/list.h>
39		39
40	#define KERNEL_ADDRESS_SPACE_START KERNEL_ADDRESS_SPACE_START_ARCH	40	#define KERNEL_ADDRESS_SPACE_START KERNEL_ADDRESS_SPACE_START_ARCH
41	#define KERNEL_ADDRESS_SPACE_END KERNEL_ADDRESS_SPACE_END_ARCH	41	#define KERNEL_ADDRESS_SPACE_END KERNEL_ADDRESS_SPACE_END_ARCH
42	#define USER_ADDRESS_SPACE_START USER_ADDRESS_SPACE_START_ARCH	42	#define USER_ADDRESS_SPACE_START USER_ADDRESS_SPACE_START_ARCH
43	#define USER_ADDRESS_SPACE_END USER_ADDRESS_SPACE_END_ARCH	43	#define USER_ADDRESS_SPACE_END USER_ADDRESS_SPACE_END_ARCH
44		44
45	#define IS_KA(addr) ((addr)>=KERNEL_ADDRESS_SPACE_START && (addr)<=KERNEL_ADDRESS_SPACE_END)	45	#define IS_KA(addr) ((addr)>=KERNEL_ADDRESS_SPACE_START && (addr)<=KERNEL_ADDRESS_SPACE_END)
46		46
47	#define UTEXT_ADDRESS UTEXT_ADDRESS_ARCH	47	#define UTEXT_ADDRESS UTEXT_ADDRESS_ARCH
48	#define USTACK_ADDRESS USTACK_ADDRESS_ARCH	48	#define USTACK_ADDRESS USTACK_ADDRESS_ARCH
49	#define UDATA_ADDRESS UDATA_ADDRESS_ARCH	49	#define UDATA_ADDRESS UDATA_ADDRESS_ARCH
50		50
51	#define FLAG_AS_KERNEL (1 << 0) /*< Kernel address space. /	51	#define FLAG_AS_KERNEL (1 << 0) /*< Kernel address space. /
52		52
53	enum as_area_type {	53	enum as_area_type {
54	AS_AREA_TEXT = 1, AS_AREA_DATA, AS_AREA_STACK	54	AS_AREA_TEXT = 1, AS_AREA_DATA, AS_AREA_STACK
55	};	55	};
56		56
57	/** Address space area structure.	57	/** Address space area structure.
58	*	58	*
59	* Each as_area_t structure describes one contiguous area of virtual memory.	59	* Each as_area_t structure describes one contiguous area of virtual memory.
60	* In the future, it should not be difficult to support shared areas.	60	* In the future, it should not be difficult to support shared areas.
61	*/	61	*/
62	struct as_area {	62	struct as_area {
63	SPINLOCK_DECLARE(lock);	63	SPINLOCK_DECLARE(lock);
64	link_t link;	64	link_t link;
65	as_area_type_t type;	65	as_area_type_t type;
66	size_t size; /*< Size of this area in multiples of PAGE_SIZE. /	66	size_t size; /*< Size of this area in multiples of PAGE_SIZE. /
67	__address base; /*< Base address of this area. /	67	__address base; /*< Base address of this area. /
68	};	68	};
69		69
70	/** Address space structure.	70	/** Address space structure.
71	*	71	*
72	* as_t contains the list of as_areas of userspace accessible	72	* as_t contains the list of as_areas of userspace accessible
73	* pages for one or more tasks. Ranges of kernel memory pages are not	73	* pages for one or more tasks. Ranges of kernel memory pages are not
74	* supposed to figure in the list as they are shared by all tasks and	74	* supposed to figure in the list as they are shared by all tasks and
75	* set up during system initialization.	75	* set up during system initialization.
76	*/	76	*/
77	struct as {	77	struct as {
78	/** Protected by asidlock. Must be acquired before as->lock. */	78	/** Protected by asidlock. Must be acquired before as->lock. */
79	link_t as_with_asid_link;	79	link_t inactive_as_with_asid_link;
80		80
81	SPINLOCK_DECLARE(lock);	81	SPINLOCK_DECLARE(lock);
-		82
-		83	/** Number of processors on wich is this address space active. */
-		84	count_t refcount;
-		85
82	link_t as_area_head;	86	link_t as_area_head;
83		87
84	/** Page table pointer. Constant on architectures that use global page hash table. */	88	/** Page table pointer. Constant on architectures that use global page hash table. */
85	pte_t *page_table;	89	pte_t *page_table;
86		90
87	/** Address space identifier. Constant on architectures that do not support ASIDs.*/	91	/** Address space identifier. Constant on architectures that do not support ASIDs.*/
88	asid_t asid;	92	asid_t asid;
89	};	93	};
90		94
91	struct as_operations {	95	struct as_operations {
92	pte_t ( page_table_create)(int flags);	96	pte_t ( page_table_create)(int flags);
93	};	97	};
94	typedef struct as_operations as_operations_t;	98	typedef struct as_operations as_operations_t;
95		99
96	extern as_t *AS_KERNEL;	100	extern as_t *AS_KERNEL;
97	extern as_operations_t *as_operations;	101	extern as_operations_t *as_operations;
98		102
-		103	extern spinlock_t as_lock;
-		104	extern link_t inactive_as_with_asid_head;
-		105
99	extern void as_init(void);	106	extern void as_init(void);
100	extern as_t *as_create(int flags);	107	extern as_t *as_create(int flags);
101	extern as_area_t as_area_create(as_t as, as_area_type_t type, size_t size, __address base);	108	extern as_area_t as_area_create(as_t as, as_area_type_t type, size_t size, __address base);
102	extern void as_set_mapping(as_t *as, __address page, __address frame);	109	extern void as_set_mapping(as_t *as, __address page, __address frame);
103	extern int as_page_fault(__address page);	110	extern int as_page_fault(__address page);
104	extern void as_install(as_t *m);	111	extern void as_switch(as_t old, as_t new);
105		112
106	/* Interface to be implemented by architectures. */	113	/* Interface to be implemented by architectures. */
107	#ifndef as_install_arch	114	#ifndef as_install_arch
108	extern void as_install_arch(as_t *as);	115	extern void as_install_arch(as_t *as);
109	#endif /* !def as_install_arch */	116	#endif /* !def as_install_arch */
110		117
111	#endif	118	#endif
112		119