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 <mm/as_arg.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>
#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 flags. */
#define AS_AREA_READ    1
#define AS_AREA_WRITE   2
#define AS_AREA_EXEC    4
#define AS_AREA_DEVICE  8
 
/** 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 asp_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(). */
 
/** 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);
    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. */
};
 
/** 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;
 
    /** 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);
int as_area_send(task_id_t dst_id, __address base);
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);
 
/* 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);
extern __native sys_as_area_accept(as_area_acptsnd_arg_t *uspace_accept_arg);
extern __native sys_as_area_send(as_area_acptsnd_arg_t *uspace_send_arg);
 
#endif
 

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/generic/include/mm/as.h @ 1288 – Rev 1288 → 1306

Rev 1288		Rev 1306
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 <mm/as_arg.h>	32	#include <mm/as_arg.h>
33	#include <arch/mm/page.h>	33	#include <arch/mm/page.h>
34	#include <arch/mm/as.h>	34	#include <arch/mm/as.h>
35	#include <arch/mm/asid.h>	35	#include <arch/mm/asid.h>
36	#include <arch/types.h>	36	#include <arch/types.h>
37	#include <typedefs.h>	37	#include <typedefs.h>
38	#include <synch/spinlock.h>	38	#include <synch/spinlock.h>
39	#include <adt/list.h>	39	#include <adt/list.h>
40	#include <adt/btree.h>	40	#include <adt/btree.h>
41		41
42	/** Defined to be true if user address space and kernel address space shadow each other. */	42	/** Defined to be true if user address space and kernel address space shadow each other. */
43	#define KERNEL_ADDRESS_SPACE_SHADOWED KERNEL_ADDRESS_SPACE_SHADOWED_ARCH	43	#define KERNEL_ADDRESS_SPACE_SHADOWED KERNEL_ADDRESS_SPACE_SHADOWED_ARCH
44		44
45	#define KERNEL_ADDRESS_SPACE_START KERNEL_ADDRESS_SPACE_START_ARCH	45	#define KERNEL_ADDRESS_SPACE_START KERNEL_ADDRESS_SPACE_START_ARCH
46	#define KERNEL_ADDRESS_SPACE_END KERNEL_ADDRESS_SPACE_END_ARCH	46	#define KERNEL_ADDRESS_SPACE_END KERNEL_ADDRESS_SPACE_END_ARCH
47	#define USER_ADDRESS_SPACE_START USER_ADDRESS_SPACE_START_ARCH	47	#define USER_ADDRESS_SPACE_START USER_ADDRESS_SPACE_START_ARCH
48	#define USER_ADDRESS_SPACE_END USER_ADDRESS_SPACE_END_ARCH	48	#define USER_ADDRESS_SPACE_END USER_ADDRESS_SPACE_END_ARCH
49		49
50	#define IS_KA(addr) ((addr)>=KERNEL_ADDRESS_SPACE_START && (addr)<=KERNEL_ADDRESS_SPACE_END)	50	#define IS_KA(addr) ((addr)>=KERNEL_ADDRESS_SPACE_START && (addr)<=KERNEL_ADDRESS_SPACE_END)
51		51
52	#define USTACK_ADDRESS USTACK_ADDRESS_ARCH	52	#define USTACK_ADDRESS USTACK_ADDRESS_ARCH
53		53
54	#define FLAG_AS_KERNEL (1 << 0) /*< Kernel address space. /	54	#define FLAG_AS_KERNEL (1 << 0) /*< Kernel address space. /
55		55
56	/** Address space area flags. */	56	/** Address space area flags. */
57	#define AS_AREA_READ 1	57	#define AS_AREA_READ 1
58	#define AS_AREA_WRITE 2	58	#define AS_AREA_WRITE 2
59	#define AS_AREA_EXEC 4	59	#define AS_AREA_EXEC 4
60	#define AS_AREA_DEVICE 8	60	#define AS_AREA_DEVICE 8
61		61
62	/** Address space area attributes. */	62	/** Address space area attributes. */
63	#define AS_AREA_ATTR_NONE 0	63	#define AS_AREA_ATTR_NONE 0
64	#define AS_AREA_ATTR_PARTIAL 1 /* Not fully initialized area. */	64	#define AS_AREA_ATTR_PARTIAL 1 /* Not fully initialized area. */
65		65
66	#define AS_PF_FAULT 0 /*< The page fault was not resolved by asp_page_fault(). /	66	#define AS_PF_FAULT 0 /*< The page fault was not resolved by asp_page_fault(). /
67	#define AS_PF_OK 1 /*< The page fault was resolved by as_page_fault(). /	67	#define AS_PF_OK 1 /*< The page fault was resolved by as_page_fault(). /
68	#define AS_PF_DEFER 2 /*< The page fault was caused by memcpy_from_uspace(). /	68	#define AS_PF_DEFER 2 /*< The page fault was caused by memcpy_from_uspace(). /
69		69
70	/** Address space area structure.	70	/** Address space area structure.
71	*	71	*
72	* Each as_area_t structure describes one contiguous area of virtual memory.	72	* Each as_area_t structure describes one contiguous area of virtual memory.
73	* In the future, it should not be difficult to support shared areas.	73	* In the future, it should not be difficult to support shared areas.
74	*/	74	*/
75	struct as_area {	75	struct as_area {
76	SPINLOCK_DECLARE(lock);	76	SPINLOCK_DECLARE(lock);
77	int flags; /*< Flags related to the memory represented by the address space area. /	77	int flags; /*< Flags related to the memory represented by the address space area. /
78	int attributes; /*< Attributes related to the address space area itself. /	78	int attributes; /*< Attributes related to the address space area itself. /
79	count_t pages; /*< Size of this area in multiples of PAGE_SIZE. /	79	count_t pages; /*< Size of this area in multiples of PAGE_SIZE. /
80	__address base; /*< Base address of this area. /	80	__address base; /*< Base address of this area. /
81	};	81	};
82		82
83	/** Address space structure.	83	/** Address space structure.
84	*	84	*
85	* as_t contains the list of as_areas of userspace accessible	85	* as_t contains the list of as_areas of userspace accessible
86	* pages for one or more tasks. Ranges of kernel memory pages are not	86	* pages for one or more tasks. Ranges of kernel memory pages are not
87	* supposed to figure in the list as they are shared by all tasks and	87	* supposed to figure in the list as they are shared by all tasks and
88	* set up during system initialization.	88	* set up during system initialization.
89	*/	89	*/
90	struct as {	90	struct as {
91	/** Protected by asidlock. Must be acquired before as->lock. */	91	/** Protected by asidlock. Must be acquired before as->lock. */
92	link_t inactive_as_with_asid_link;	92	link_t inactive_as_with_asid_link;
93		93
94	SPINLOCK_DECLARE(lock);	94	SPINLOCK_DECLARE(lock);
95		95
96	/** Number of processors on wich is this address space active. */	96	/** Number of processors on wich is this address space active. */
97	count_t refcount;	97	count_t refcount;
98		98
99	/** B+tree of address space areas. */	99	/** B+tree of address space areas. */
100	btree_t as_area_btree;	100	btree_t as_area_btree;
101		101
102	/** Page table pointer. Constant on architectures that use global page hash table. */	102	/** Page table pointer. Constant on architectures that use global page hash table. */
103	pte_t *page_table;	103	pte_t *page_table;
104		104
105	/** Address space identifier. Constant on architectures that do not support ASIDs.*/	105	/** Address space identifier. Constant on architectures that do not support ASIDs.*/
106	asid_t asid;	106	asid_t asid;
107	};	107	};
108		108
109	struct as_operations {	109	struct as_operations {
110	pte_t ( page_table_create)(int flags);	110	pte_t ( page_table_create)(int flags);
111	void (* page_table_lock)(as_t *as, bool lock);	111	void (* page_table_lock)(as_t *as, bool lock);
112	void (* page_table_unlock)(as_t *as, bool unlock);	112	void (* page_table_unlock)(as_t *as, bool unlock);
113	};	113	};
114	typedef struct as_operations as_operations_t;	114	typedef struct as_operations as_operations_t;
115		115
116	extern as_t *AS_KERNEL;	116	extern as_t *AS_KERNEL;
117	extern as_operations_t *as_operations;	117	extern as_operations_t *as_operations;
118		118
119	extern spinlock_t as_lock;	119	extern spinlock_t as_lock;
120	extern link_t inactive_as_with_asid_head;	120	extern link_t inactive_as_with_asid_head;
121		121
122	extern void as_init(void);	122	extern void as_init(void);
123	extern as_t *as_create(int flags);	123	extern as_t *as_create(int flags);
124	extern as_area_t as_area_create(as_t as, int flags, size_t size, __address base, int attrs);	124	extern as_area_t as_area_create(as_t as, int flags, size_t size, __address base, int attrs);
125	extern __address as_area_resize(as_t *as, __address address, size_t size, int flags);	125	extern int as_area_resize(as_t *as, __address address, size_t size, int flags);
-		126	extern int as_area_destroy(as_t *as, __address address);
126	int as_area_send(task_id_t dst_id, __address base);	127	int as_area_send(task_id_t dst_id, __address base);
127	extern void as_set_mapping(as_t *as, __address page, __address frame);	128	extern void as_set_mapping(as_t *as, __address page, __address frame);
128	extern int as_page_fault(__address page, istate_t *istate);	129	extern int as_page_fault(__address page, istate_t *istate);
129	extern void as_switch(as_t old, as_t new);	130	extern void as_switch(as_t old, as_t new);
130	extern void as_free(as_t *as);	131	extern void as_free(as_t *as);
131		132
132	/* Interface to be implemented by architectures. */	133	/* Interface to be implemented by architectures. */
133	#ifndef as_install_arch	134	#ifndef as_install_arch
134	extern void as_install_arch(as_t *as);	135	extern void as_install_arch(as_t *as);
135	#endif /* !def as_install_arch */	136	#endif /* !def as_install_arch */
136		137
137	/* Address space area related syscalls. */	138	/* Address space area related syscalls. */
138	extern __native sys_as_area_create(__address address, size_t size, int flags);	139	extern __native sys_as_area_create(__address address, size_t size, int flags);
139	extern __native sys_as_area_resize(__address address, size_t size, int flags);	140	extern __native sys_as_area_resize(__address address, size_t size, int flags);
-		141	extern __native sys_as_area_destroy(__address address);
140	extern __native sys_as_area_accept(as_area_acptsnd_arg_t *uspace_accept_arg);	142	extern __native sys_as_area_accept(as_area_acptsnd_arg_t *uspace_accept_arg);
141	extern __native sys_as_area_send(as_area_acptsnd_arg_t *uspace_send_arg);	143	extern __native sys_as_area_send(as_area_acptsnd_arg_t *uspace_send_arg);
142		144
143	#endif	145	#endif
144		146