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__
 
/** Address space area flags. */
#define AS_AREA_READ    1
#define AS_AREA_WRITE   2
#define AS_AREA_EXEC    4
#define AS_AREA_DEVICE  8
 
 
#ifdef KERNEL
 
#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 <synch/mutex.h>
#include <adt/list.h>
#include <adt/btree.h>
 
/** Defined to be true if user address space and kernel address space shadow each other. */
#define KERNEL_ADDRESS_SPACE_SHADOWED   KERNEL_ADDRESS_SPACE_SHADOWED_ARCH
 
#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 USTACK_ADDRESS  USTACK_ADDRESS_ARCH
 
#define FLAG_AS_KERNEL      (1 << 0)    /**< Kernel address space. */
 
 
/** Address space area attributes. */
#define AS_AREA_ATTR_NONE   0
#define AS_AREA_ATTR_PARTIAL    1   /* Not fully initialized area. */
 
#define AS_PF_FAULT     0   /**< The page fault was not resolved by as_page_fault(). */
#define AS_PF_OK        1   /**< The page fault was resolved by as_page_fault(). */
#define AS_PF_DEFER     2   /**< The page fault was caused by memcpy_from_uspace()
                         or memcpy_to_uspace(). */
 
/** 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 {
    mutex_t lock;
    int flags;      /**< Flags related to the memory represented by the address space area. */
    int attributes;     /**< Attributes related to the address space area itself. */
    count_t pages;      /**< Size of this area in multiples of PAGE_SIZE. */
    __address base;     /**< Base address of this area. */
    btree_t used_space; /**< Map of used space. */
};
 
/** 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. */
    link_t inactive_as_with_asid_link;
 
    mutex_t lock;
 
    /** Number of processors on wich is this address space active. */
    count_t refcount;
 
    /** B+tree of address space areas. */
    btree_t as_area_btree;
 
    /** 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);
    void (* page_table_lock)(as_t *as, bool lock);
    void (* page_table_unlock)(as_t *as, bool unlock);
};
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, int flags, size_t size, __address base, int attrs);
extern int as_area_resize(as_t *as, __address address, size_t size, int flags);
extern int as_area_destroy(as_t *as, __address address);
extern void as_set_mapping(as_t *as, __address page, __address frame);
extern int as_page_fault(__address page, istate_t *istate);
extern void as_switch(as_t *old, as_t *new);
extern void as_free(as_t *as);
extern int as_area_steal(task_t *src_task, __address src_base, size_t acc_size, __address dst_base);
extern size_t as_get_size(__address base);
 
/* Interface to be implemented by architectures. */
#ifndef as_install_arch
extern void as_install_arch(as_t *as);
#endif /* !def as_install_arch */
 
/* Address space area related syscalls. */
extern __native sys_as_area_create(__address address, size_t size, int flags);
extern __native sys_as_area_resize(__address address, size_t size, int flags);
extern __native sys_as_area_destroy(__address address);
 
#endif /* KERNEL */
 
#endif
 

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/generic/include/mm/as.h – Rev 1380 → 1387

Rev 1380		Rev 1387
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	/** Address space area flags. */	32	/** Address space area flags. */
33	#define AS_AREA_READ 1	33	#define AS_AREA_READ 1
34	#define AS_AREA_WRITE 2	34	#define AS_AREA_WRITE 2
35	#define AS_AREA_EXEC 4	35	#define AS_AREA_EXEC 4
36	#define AS_AREA_DEVICE 8	36	#define AS_AREA_DEVICE 8
37		37
38		-
39	#ifdef KERNEL	38	#ifdef KERNEL
40		39
41	#include <arch/mm/page.h>	40	#include <arch/mm/page.h>
42	#include <arch/mm/as.h>	41	#include <arch/mm/as.h>
43	#include <arch/mm/asid.h>	42	#include <arch/mm/asid.h>
44	#include <arch/types.h>	43	#include <arch/types.h>
45	#include <typedefs.h>	44	#include <typedefs.h>
46	#include <synch/spinlock.h>	45	#include <synch/spinlock.h>
47	#include <synch/mutex.h>	46	#include <synch/mutex.h>
48	#include <adt/list.h>	47	#include <adt/list.h>
49	#include <adt/btree.h>	48	#include <adt/btree.h>
50		49
51	/** Defined to be true if user address space and kernel address space shadow each other. */	50	/** Defined to be true if user address space and kernel address space shadow each other. */
52	#define KERNEL_ADDRESS_SPACE_SHADOWED KERNEL_ADDRESS_SPACE_SHADOWED_ARCH	51	#define KERNEL_ADDRESS_SPACE_SHADOWED KERNEL_ADDRESS_SPACE_SHADOWED_ARCH
53		52
54	#define KERNEL_ADDRESS_SPACE_START KERNEL_ADDRESS_SPACE_START_ARCH	53	#define KERNEL_ADDRESS_SPACE_START KERNEL_ADDRESS_SPACE_START_ARCH
55	#define KERNEL_ADDRESS_SPACE_END KERNEL_ADDRESS_SPACE_END_ARCH	54	#define KERNEL_ADDRESS_SPACE_END KERNEL_ADDRESS_SPACE_END_ARCH
56	#define USER_ADDRESS_SPACE_START USER_ADDRESS_SPACE_START_ARCH	55	#define USER_ADDRESS_SPACE_START USER_ADDRESS_SPACE_START_ARCH
57	#define USER_ADDRESS_SPACE_END USER_ADDRESS_SPACE_END_ARCH	56	#define USER_ADDRESS_SPACE_END USER_ADDRESS_SPACE_END_ARCH
58		57
59	#define IS_KA(addr) ((addr)>=KERNEL_ADDRESS_SPACE_START && (addr)<=KERNEL_ADDRESS_SPACE_END)	58	#define IS_KA(addr) ((addr)>=KERNEL_ADDRESS_SPACE_START && (addr)<=KERNEL_ADDRESS_SPACE_END)
60		59
61	#define USTACK_ADDRESS USTACK_ADDRESS_ARCH	60	#define USTACK_ADDRESS USTACK_ADDRESS_ARCH
62		61
63	#define FLAG_AS_KERNEL (1 << 0) /*< Kernel address space. /	62	#define FLAG_AS_KERNEL (1 << 0) /*< Kernel address space. /
64		63
65		64
66	/** Address space area attributes. */	65	/** Address space area attributes. */
67	#define AS_AREA_ATTR_NONE 0	66	#define AS_AREA_ATTR_NONE 0
68	#define AS_AREA_ATTR_PARTIAL 1 /* Not fully initialized area. */	67	#define AS_AREA_ATTR_PARTIAL 1 /* Not fully initialized area. */
69		68
70	#define AS_PF_FAULT 0 /*< The page fault was not resolved by as_page_fault(). /	69	#define AS_PF_FAULT 0 /*< The page fault was not resolved by as_page_fault(). /
71	#define AS_PF_OK 1 /*< The page fault was resolved by as_page_fault(). /	70	#define AS_PF_OK 1 /*< The page fault was resolved by as_page_fault(). /
72	#define AS_PF_DEFER 2 /**< The page fault was caused by memcpy_from_uspace()	71	#define AS_PF_DEFER 2 /**< The page fault was caused by memcpy_from_uspace()
73	or memcpy_to_uspace(). */	72	or memcpy_to_uspace(). */
74		73
75	/** Address space area structure.	74	/** Address space area structure.
76	*	75	*
77	* Each as_area_t structure describes one contiguous area of virtual memory.	76	* Each as_area_t structure describes one contiguous area of virtual memory.
78	* In the future, it should not be difficult to support shared areas.	77	* In the future, it should not be difficult to support shared areas.
79	*/	78	*/
80	struct as_area {	79	struct as_area {
81	mutex_t lock;	80	mutex_t lock;
82	int flags; /*< Flags related to the memory represented by the address space area. /	81	int flags; /*< Flags related to the memory represented by the address space area. /
83	int attributes; /*< Attributes related to the address space area itself. /	82	int attributes; /*< Attributes related to the address space area itself. /
84	count_t pages; /*< Size of this area in multiples of PAGE_SIZE. /	83	count_t pages; /*< Size of this area in multiples of PAGE_SIZE. /
85	__address base; /*< Base address of this area. /	84	__address base; /*< Base address of this area. /
-		85	btree_t used_space; /*< Map of used space. /
86	};	86	};
87		87
88	/** Address space structure.	88	/** Address space structure.
89	*	89	*
90	* as_t contains the list of as_areas of userspace accessible	90	* as_t contains the list of as_areas of userspace accessible
91	* pages for one or more tasks. Ranges of kernel memory pages are not	91	* pages for one or more tasks. Ranges of kernel memory pages are not
92	* supposed to figure in the list as they are shared by all tasks and	92	* supposed to figure in the list as they are shared by all tasks and
93	* set up during system initialization.	93	* set up during system initialization.
94	*/	94	*/
95	struct as {	95	struct as {
96	/** Protected by asidlock. */	96	/** Protected by asidlock. */
97	link_t inactive_as_with_asid_link;	97	link_t inactive_as_with_asid_link;
98		98
99	mutex_t lock;	99	mutex_t lock;
100		100
101	/** Number of processors on wich is this address space active. */	101	/** Number of processors on wich is this address space active. */
102	count_t refcount;	102	count_t refcount;
103		103
104	/** B+tree of address space areas. */	104	/** B+tree of address space areas. */
105	btree_t as_area_btree;	105	btree_t as_area_btree;
106		106
107	/** Page table pointer. Constant on architectures that use global page hash table. */	107	/** Page table pointer. Constant on architectures that use global page hash table. */
108	pte_t *page_table;	108	pte_t *page_table;
109		109
110	/** Address space identifier. Constant on architectures that do not support ASIDs.*/	110	/** Address space identifier. Constant on architectures that do not support ASIDs.*/
111	asid_t asid;	111	asid_t asid;
112	};	112	};
113		113
114	struct as_operations {	114	struct as_operations {
115	pte_t ( page_table_create)(int flags);	115	pte_t ( page_table_create)(int flags);
116	void (* page_table_lock)(as_t *as, bool lock);	116	void (* page_table_lock)(as_t *as, bool lock);
117	void (* page_table_unlock)(as_t *as, bool unlock);	117	void (* page_table_unlock)(as_t *as, bool unlock);
118	};	118	};
119	typedef struct as_operations as_operations_t;	119	typedef struct as_operations as_operations_t;
120		120
121	extern as_t *AS_KERNEL;	121	extern as_t *AS_KERNEL;
122	extern as_operations_t *as_operations;	122	extern as_operations_t *as_operations;
123		123
124	extern spinlock_t as_lock;	124	extern spinlock_t as_lock;
125	extern link_t inactive_as_with_asid_head;	125	extern link_t inactive_as_with_asid_head;
126		126
127	extern void as_init(void);	127	extern void as_init(void);
128	extern as_t *as_create(int flags);	128	extern as_t *as_create(int flags);
129	extern as_area_t as_area_create(as_t as, int flags, size_t size, __address base, int attrs);	129	extern as_area_t as_area_create(as_t as, int flags, size_t size, __address base, int attrs);
130	extern int as_area_resize(as_t *as, __address address, size_t size, int flags);	130	extern int as_area_resize(as_t *as, __address address, size_t size, int flags);
131	extern int as_area_destroy(as_t *as, __address address);	131	extern int as_area_destroy(as_t *as, __address address);
132	extern void as_set_mapping(as_t *as, __address page, __address frame);	132	extern void as_set_mapping(as_t *as, __address page, __address frame);
133	extern int as_page_fault(__address page, istate_t *istate);	133	extern int as_page_fault(__address page, istate_t *istate);
134	extern void as_switch(as_t old, as_t new);	134	extern void as_switch(as_t old, as_t new);
135	extern void as_free(as_t *as);	135	extern void as_free(as_t *as);
136	extern int as_area_steal(task_t *src_task, __address src_base, size_t acc_size, __address dst_base);	136	extern int as_area_steal(task_t *src_task, __address src_base, size_t acc_size, __address dst_base);
137	extern size_t as_get_size(__address base);	137	extern size_t as_get_size(__address base);
138		138
139	/* Interface to be implemented by architectures. */	139	/* Interface to be implemented by architectures. */
140	#ifndef as_install_arch	140	#ifndef as_install_arch
141	extern void as_install_arch(as_t *as);	141	extern void as_install_arch(as_t *as);
142	#endif /* !def as_install_arch */	142	#endif /* !def as_install_arch */
143		143
144	/* Address space area related syscalls. */	144	/* Address space area related syscalls. */
145	extern __native sys_as_area_create(__address address, size_t size, int flags);	145	extern __native sys_as_area_create(__address address, size_t size, int flags);
146	extern __native sys_as_area_resize(__address address, size_t size, int flags);	146	extern __native sys_as_area_resize(__address address, size_t size, int flags);
147	extern __native sys_as_area_destroy(__address address);	147	extern __native sys_as_area_destroy(__address address);
148		148
149	#endif /* KERNEL */	149	#endif /* KERNEL */
150		150
151	#endif	151	#endif
152		152