WebSVN – HelenOS-historic – Diff – /kernel/trunk/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 <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 as_with_asid_link;
 
    SPINLOCK_DECLARE(lock);
    link_t as_area_head;
    pte_t *ptl0;
    asid_t asid;            /**< Address space identifier. */
};
 
extern as_t *AS_KERNEL;
 
extern as_t *as_create(pte_t *ptl0, 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_install(as_t *m);
 
/* 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-historic

(root)/kernel/trunk/generic/include/mm/as.h @ 1780 – Rev 754 → 755

Rev 754		Rev 755
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 <list.h>	38	#include <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 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 as_with_asid_link;
80		80
81	SPINLOCK_DECLARE(lock);	81	SPINLOCK_DECLARE(lock);
82	link_t as_area_head;	82	link_t as_area_head;
83	pte_t *ptl0;	83	pte_t *ptl0;
84	asid_t asid; /*< Address space identifier. /	84	asid_t asid; /*< Address space identifier. /
85	};	85	};
86		86
-		87	extern as_t *AS_KERNEL;
-		88
87	extern as_t * as_create(pte_t *ptl0, int flags);	89	extern as_t as_create(pte_t ptl0, int flags);
88	extern as_area_t as_area_create(as_t as, as_area_type_t type, size_t size, __address base);	90	extern as_area_t as_area_create(as_t as, as_area_type_t type, size_t size, __address base);
89	extern void as_set_mapping(as_t *as, __address page, __address frame);	91	extern void as_set_mapping(as_t *as, __address page, __address frame);
90	extern int as_page_fault(__address page);	92	extern int as_page_fault(__address page);
91	extern void as_install(as_t *m);	93	extern void as_install(as_t *m);
92		94
93	/* Interface to be implemented by architectures. */	95	/* Interface to be implemented by architectures. */
94	#ifndef as_install_arch	96	#ifndef as_install_arch
95	extern void as_install_arch(as_t *as);	97	extern void as_install_arch(as_t *as);
96	#endif /* !def as_install_arch */	98	#endif /* !def as_install_arch */
97		99
98	#endif	100	#endif
99		101