WebSVN – HelenOS – Diff – /trunk/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.
 */
 
/** @addtogroup genericmm
 * @{
 */
/** @file
 */
 
#ifndef KERN_AS_H_
#define KERN_AS_H_
 
/** Address space area flags. */
#define AS_AREA_READ        1
#define AS_AREA_WRITE       2
#define AS_AREA_EXEC        4
#define AS_AREA_CACHEABLE   8
 
#ifdef KERNEL
 
#include <arch/mm/page.h>
#include <arch/mm/as.h>
#include <arch/mm/asid.h>
#include <arch/types.h>
#include <synch/spinlock.h>
#include <synch/mutex.h>
#include <adt/list.h>
#include <adt/btree.h>
#include <lib/elf.h>
 
#ifdef __OBJC__
#include <lib/objc.h>
#endif
 
/**
 * 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 USTACK_ADDRESS          USTACK_ADDRESS_ARCH
 
/** Kernel address space. */
#define FLAG_AS_KERNEL          (1 << 0)    
 
/* Address space area attributes. */
#define AS_AREA_ATTR_NONE   0
#define AS_AREA_ATTR_PARTIAL    1   /**< Not fully initialized area. */
 
/** The page fault was not resolved by as_page_fault(). */
#define AS_PF_FAULT     0
/** The page fault was resolved by as_page_fault(). */
#define AS_PF_OK        1
/** The page fault was caused by memcpy_from_uspace() or memcpy_to_uspace(). */
#define AS_PF_DEFER     2
 
#ifdef __OBJC__
@interface as_t : base_t {
    @public
        /** Protected by asidlock. */
        link_t inactive_as_with_asid_link;
        /**
         * Number of processors on wich is this address space active.
         * Protected by asidlock.
         */
        count_t cpu_refcount;
        /**
         * Address space identifier.
         * Constant on architectures that do not support ASIDs.
         * Protected by asidlock.  
         */
        asid_t asid;
       
        /** Number of references (i.e tasks that reference this as). */
        atomic_t refcount;
 
        mutex_t lock;
       
        /** B+tree of address space areas. */
        btree_t as_area_btree;
       
        /** Non-generic content. */
        as_genarch_t genarch;
       
        /** Architecture specific content. */
        as_arch_t arch;
}
 
+ (pte_t *) page_table_create: (int) flags;
+ (void) page_table_destroy: (pte_t *) page_table;
- (void) page_table_lock: (bool) _lock;
- (void) page_table_unlock: (bool) unlock;
 
@end
 
#else
 
/** 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.
 */
typedef struct as {
    /** Protected by asidlock. */
    link_t inactive_as_with_asid_link;
    /**
     * Number of processors on wich is this address space active.
     * Protected by asidlock.
     */
    count_t cpu_refcount;
    /**
     * Address space identifier.
     * Constant on architectures that do not support ASIDs.
     * Protected by asidlock.
     */
    asid_t asid;
 
    /** Number of references (i.e tasks that reference this as). */
    atomic_t refcount;
 
    mutex_t lock;
 
    /** B+tree of address space areas. */
    btree_t as_area_btree;
   
    /** Non-generic content. */
    as_genarch_t genarch;
 
    /** Architecture specific content. */
    as_arch_t arch;
} as_t;
 
typedef struct {
    pte_t *(* page_table_create)(int flags);
    void (* page_table_destroy)(pte_t *page_table);
    void (* page_table_lock)(as_t *as, bool lock);
    void (* page_table_unlock)(as_t *as, bool unlock);
} as_operations_t;
#endif
 
/**
 * This structure contains information associated with the shared address space
 * area.
 */
typedef struct {
    /** This lock must be acquired only when the as_area lock is held. */
    mutex_t lock;      
    /** This structure can be deallocated if refcount drops to 0. */
    count_t refcount;
    /**
     * B+tree containing complete map of anonymous pages of the shared area.
     */
    btree_t pagemap;
} share_info_t;
 
/** Page fault access type. */
typedef enum {
    PF_ACCESS_READ,
    PF_ACCESS_WRITE,
    PF_ACCESS_EXEC
} pf_access_t;
 
struct mem_backend;
 
/** Backend data stored in address space area. */
typedef union mem_backend_data {
    struct {    /**< elf_backend members */
        elf_header_t *elf;
        elf_segment_header_t *segment;
    };
    struct {    /**< phys_backend members */
        uintptr_t base;
        count_t frames;
    };
} mem_backend_data_t;
 
/** Address space area structure.
 *
 * Each as_area_t structure describes one contiguous area of virtual memory.
 */
typedef struct {
    mutex_t lock;
    /** Containing address space. */
    as_t *as;      
    /**
     * Flags related to the memory represented by the address space area.
     */
    int flags;
    /** Attributes related to the address space area itself. */
    int attributes;
    /** Size of this area in multiples of PAGE_SIZE. */
    count_t pages;
    /** Base address of this area. */
    uintptr_t base;
    /** Map of used space. */
    btree_t used_space;
 
    /**
     * If the address space area has been shared, this pointer will
     * reference the share info structure.
     */
    share_info_t *sh_info;
 
    /** Memory backend backing this address space area. */
    struct mem_backend *backend;
 
    /** Data to be used by the backend. */
    mem_backend_data_t backend_data;
} as_area_t;
 
/** Address space area backend structure. */
typedef struct mem_backend {
    int (* page_fault)(as_area_t *area, uintptr_t addr, pf_access_t access);
    void (* frame_free)(as_area_t *area, uintptr_t page, uintptr_t frame);
    void (* share)(as_area_t *area);
} mem_backend_t;
 
extern as_t *AS_KERNEL;
 
#ifndef __OBJC__
extern as_operations_t *as_operations;
#endif
 
extern link_t inactive_as_with_asid_head;
 
extern void as_init(void);
 
extern as_t *as_create(int flags);
extern void as_destroy(as_t *as);
extern void as_switch(as_t *old_as, as_t *new_as);
extern int as_page_fault(uintptr_t page, pf_access_t access, istate_t *istate);
 
extern as_area_t *as_area_create(as_t *as, int flags, size_t size,
    uintptr_t base, int attrs, mem_backend_t *backend,
    mem_backend_data_t *backend_data);
extern int as_area_destroy(as_t *as, uintptr_t address);   
extern int as_area_resize(as_t *as, uintptr_t address, size_t size, int flags);
int as_area_share(as_t *src_as, uintptr_t src_base, size_t acc_size,
    as_t *dst_as, uintptr_t dst_base, int dst_flags_mask);
extern int as_area_change_flags(as_t *as, int flags, uintptr_t address);
 
extern int as_area_get_flags(as_area_t *area);
extern bool as_area_check_access(as_area_t *area, pf_access_t access);
extern size_t as_area_get_size(uintptr_t base);
extern int used_space_insert(as_area_t *a, uintptr_t page, count_t count);
extern int used_space_remove(as_area_t *a, uintptr_t page, count_t count);
 
 
/* Interface to be implemented by architectures. */
#ifndef as_constructor_arch
extern int as_constructor_arch(as_t *as, int flags);
#endif /* !def as_constructor_arch */
#ifndef as_destructor_arch
extern int as_destructor_arch(as_t *as);
#endif /* !def as_destructor_arch */
#ifndef as_create_arch
extern int as_create_arch(as_t *as, int flags);
#endif /* !def as_create_arch */
#ifndef as_install_arch
extern void as_install_arch(as_t *as);
#endif /* !def as_install_arch */
#ifndef as_deinstall_arch
extern void as_deinstall_arch(as_t *as);
#endif /* !def as_deinstall_arch */
 
/* Backend declarations and functions. */
extern mem_backend_t anon_backend;
extern mem_backend_t elf_backend;
extern mem_backend_t phys_backend;
 
/**
 * This flags is passed when running the loader, otherwise elf_load()
 * would return with a EE_LOADER error code.
 */
#define ELD_F_NONE  0
#define ELD_F_LOADER    1
 
extern unsigned int elf_load(elf_header_t *header, as_t *as, int flags);
 
/* Address space area related syscalls. */
extern unative_t sys_as_area_create(uintptr_t address, size_t size, int flags);
extern unative_t sys_as_area_resize(uintptr_t address, size_t size, int flags);
extern unative_t sys_as_area_change_flags(uintptr_t address, int flags);
extern unative_t sys_as_area_destroy(uintptr_t address);
 
/* Introspection functions. */
extern void as_print(as_t *as);
 
#endif /* KERNEL */
 
#endif
 
/** @}
 */
 

Rev 2745	Rev 3222
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	/** @addtogroup genericmm	29	/** @addtogroup genericmm
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#ifndef KERN_AS_H_	35	#ifndef KERN_AS_H_
36	#define KERN_AS_H_	36	#define KERN_AS_H_
37		37
38	/** Address space area flags. */	38	/** Address space area flags. */
39	#define AS_AREA_READ 1	39	#define AS_AREA_READ 1
40	#define AS_AREA_WRITE 2	40	#define AS_AREA_WRITE 2
41	#define AS_AREA_EXEC 4	41	#define AS_AREA_EXEC 4
42	#define AS_AREA_CACHEABLE 8	42	#define AS_AREA_CACHEABLE 8
43		43
44	#ifdef KERNEL	44	#ifdef KERNEL
45		45
46	#include <arch/mm/page.h>	46	#include <arch/mm/page.h>
47	#include <arch/mm/as.h>	47	#include <arch/mm/as.h>
48	#include <arch/mm/asid.h>	48	#include <arch/mm/asid.h>
49	#include <arch/types.h>	49	#include <arch/types.h>
50	#include <synch/spinlock.h>	50	#include <synch/spinlock.h>
51	#include <synch/mutex.h>	51	#include <synch/mutex.h>
52	#include <adt/list.h>	52	#include <adt/list.h>
53	#include <adt/btree.h>	53	#include <adt/btree.h>
54	#include <lib/elf.h>	54	#include <lib/elf.h>
55		55
56	#ifdef __OBJC__	56	#ifdef __OBJC__
57	#include <lib/objc.h>	57	#include <lib/objc.h>
58	#endif	58	#endif
59		59
60	/**	60	/**
61	* Defined to be true if user address space and kernel address space shadow each	61	* Defined to be true if user address space and kernel address space shadow each
62	* other.	62	* other.
63	*/	63	*/
64	#define KERNEL_ADDRESS_SPACE_SHADOWED KERNEL_ADDRESS_SPACE_SHADOWED_ARCH	64	#define KERNEL_ADDRESS_SPACE_SHADOWED KERNEL_ADDRESS_SPACE_SHADOWED_ARCH
65		65
66	#define KERNEL_ADDRESS_SPACE_START KERNEL_ADDRESS_SPACE_START_ARCH	66	#define KERNEL_ADDRESS_SPACE_START KERNEL_ADDRESS_SPACE_START_ARCH
67	#define KERNEL_ADDRESS_SPACE_END KERNEL_ADDRESS_SPACE_END_ARCH	67	#define KERNEL_ADDRESS_SPACE_END KERNEL_ADDRESS_SPACE_END_ARCH
68	#define USER_ADDRESS_SPACE_START USER_ADDRESS_SPACE_START_ARCH	68	#define USER_ADDRESS_SPACE_START USER_ADDRESS_SPACE_START_ARCH
69	#define USER_ADDRESS_SPACE_END USER_ADDRESS_SPACE_END_ARCH	69	#define USER_ADDRESS_SPACE_END USER_ADDRESS_SPACE_END_ARCH
70		70
71	#define USTACK_ADDRESS USTACK_ADDRESS_ARCH	71	#define USTACK_ADDRESS USTACK_ADDRESS_ARCH
72		72
73	/** Kernel address space. */	73	/** Kernel address space. */
74	#define FLAG_AS_KERNEL (1 << 0)	74	#define FLAG_AS_KERNEL (1 << 0)
75		75
76	/* Address space area attributes. */	76	/* Address space area attributes. */
77	#define AS_AREA_ATTR_NONE 0	77	#define AS_AREA_ATTR_NONE 0
78	#define AS_AREA_ATTR_PARTIAL 1 /*< Not fully initialized area. /	78	#define AS_AREA_ATTR_PARTIAL 1 /*< Not fully initialized area. /
79		79
80	/** The page fault was not resolved by as_page_fault(). */	80	/** The page fault was not resolved by as_page_fault(). */
81	#define AS_PF_FAULT 0	81	#define AS_PF_FAULT 0
82	/** The page fault was resolved by as_page_fault(). */	82	/** The page fault was resolved by as_page_fault(). */
83	#define AS_PF_OK 1	83	#define AS_PF_OK 1
84	/** The page fault was caused by memcpy_from_uspace() or memcpy_to_uspace(). */	84	/** The page fault was caused by memcpy_from_uspace() or memcpy_to_uspace(). */
85	#define AS_PF_DEFER 2	85	#define AS_PF_DEFER 2
86		86
87	#ifdef __OBJC__	87	#ifdef __OBJC__
88	@interface as_t : base_t {	88	@interface as_t : base_t {
89	@public	89	@public
90	/** Protected by asidlock. */	90	/** Protected by asidlock. */
91	link_t inactive_as_with_asid_link;	91	link_t inactive_as_with_asid_link;
92	/**	92	/**
93	* Number of processors on wich is this address space active.	93	* Number of processors on wich is this address space active.
94	* Protected by asidlock.	94	* Protected by asidlock.
95	*/	95	*/
96	count_t cpu_refcount;	96	count_t cpu_refcount;
97	/**	97	/**
98	* Address space identifier.	98	* Address space identifier.
99	* Constant on architectures that do not support ASIDs.	99	* Constant on architectures that do not support ASIDs.
100	* Protected by asidlock.	100	* Protected by asidlock.
101	*/	101	*/
102	asid_t asid;	102	asid_t asid;
103		103
104	/** Number of references (i.e tasks that reference this as). */	104	/** Number of references (i.e tasks that reference this as). */
105	atomic_t refcount;	105	atomic_t refcount;
106		106
107	mutex_t lock;	107	mutex_t lock;
108		108
109	/** B+tree of address space areas. */	109	/** B+tree of address space areas. */
110	btree_t as_area_btree;	110	btree_t as_area_btree;
111		111
112	/** Non-generic content. */	112	/** Non-generic content. */
113	as_genarch_t genarch;	113	as_genarch_t genarch;
114		114
115	/** Architecture specific content. */	115	/** Architecture specific content. */
116	as_arch_t arch;	116	as_arch_t arch;
117	}	117	}
118		118
119	+ (pte_t *) page_table_create: (int) flags;	119	+ (pte_t *) page_table_create: (int) flags;
120	+ (void) page_table_destroy: (pte_t *) page_table;	120	+ (void) page_table_destroy: (pte_t *) page_table;
121	- (void) page_table_lock: (bool) _lock;	121	- (void) page_table_lock: (bool) _lock;
122	- (void) page_table_unlock: (bool) unlock;	122	- (void) page_table_unlock: (bool) unlock;
123		123
124	@end	124	@end
125		125
126	#else	126	#else
127		127
128	/** Address space structure.	128	/** Address space structure.
129	*	129	*
130	* as_t contains the list of as_areas of userspace accessible	130	* as_t contains the list of as_areas of userspace accessible
131	* pages for one or more tasks. Ranges of kernel memory pages are not	131	* pages for one or more tasks. Ranges of kernel memory pages are not
132	* supposed to figure in the list as they are shared by all tasks and	132	* supposed to figure in the list as they are shared by all tasks and
133	* set up during system initialization.	133	* set up during system initialization.
134	*/	134	*/
135	typedef struct as {	135	typedef struct as {
136	/** Protected by asidlock. */	136	/** Protected by asidlock. */
137	link_t inactive_as_with_asid_link;	137	link_t inactive_as_with_asid_link;
138	/**	138	/**
139	* Number of processors on wich is this address space active.	139	* Number of processors on wich is this address space active.
140	* Protected by asidlock.	140	* Protected by asidlock.
141	*/	141	*/
142	count_t cpu_refcount;	142	count_t cpu_refcount;
143	/**	143	/**
144	* Address space identifier.	144	* Address space identifier.
145	* Constant on architectures that do not support ASIDs.	145	* Constant on architectures that do not support ASIDs.
146	* Protected by asidlock.	146	* Protected by asidlock.
147	*/	147	*/
148	asid_t asid;	148	asid_t asid;
149		149
150	/** Number of references (i.e tasks that reference this as). */	150	/** Number of references (i.e tasks that reference this as). */
151	atomic_t refcount;	151	atomic_t refcount;
152		152
153	mutex_t lock;	153	mutex_t lock;
154		154
155	/** B+tree of address space areas. */	155	/** B+tree of address space areas. */
156	btree_t as_area_btree;	156	btree_t as_area_btree;
157		157
158	/** Non-generic content. */	158	/** Non-generic content. */
159	as_genarch_t genarch;	159	as_genarch_t genarch;
160		160
161	/** Architecture specific content. */	161	/** Architecture specific content. */
162	as_arch_t arch;	162	as_arch_t arch;
163	} as_t;	163	} as_t;
164		164
165	typedef struct {	165	typedef struct {
166	pte_t ( page_table_create)(int flags);	166	pte_t ( page_table_create)(int flags);
167	void (* page_table_destroy)(pte_t *page_table);	167	void (* page_table_destroy)(pte_t *page_table);
168	void (* page_table_lock)(as_t *as, bool lock);	168	void (* page_table_lock)(as_t *as, bool lock);
169	void (* page_table_unlock)(as_t *as, bool unlock);	169	void (* page_table_unlock)(as_t *as, bool unlock);
170	} as_operations_t;	170	} as_operations_t;
171	#endif	171	#endif
172		172
173	/**	173	/**
174	* This structure contains information associated with the shared address space	174	* This structure contains information associated with the shared address space
175	* area.	175	* area.
176	*/	176	*/
177	typedef struct {	177	typedef struct {
178	/** This lock must be acquired only when the as_area lock is held. */	178	/** This lock must be acquired only when the as_area lock is held. */
179	mutex_t lock;	179	mutex_t lock;
180	/** This structure can be deallocated if refcount drops to 0. */	180	/** This structure can be deallocated if refcount drops to 0. */
181	count_t refcount;	181	count_t refcount;
182	/**	182	/**
183	* B+tree containing complete map of anonymous pages of the shared area.	183	* B+tree containing complete map of anonymous pages of the shared area.
184	*/	184	*/
185	btree_t pagemap;	185	btree_t pagemap;
186	} share_info_t;	186	} share_info_t;
187		187
188	/** Page fault access type. */	188	/** Page fault access type. */
189	typedef enum {	189	typedef enum {
190	PF_ACCESS_READ,	190	PF_ACCESS_READ,
191	PF_ACCESS_WRITE,	191	PF_ACCESS_WRITE,
192	PF_ACCESS_EXEC	192	PF_ACCESS_EXEC
193	} pf_access_t;	193	} pf_access_t;
194		194
195	struct mem_backend;	195	struct mem_backend;
196		196
197	/** Backend data stored in address space area. */	197	/** Backend data stored in address space area. */
198	typedef union mem_backend_data {	198	typedef union mem_backend_data {
199	struct { /*< elf_backend members /	199	struct { /*< elf_backend members /
200	elf_header_t *elf;	200	elf_header_t *elf;
201	elf_segment_header_t *segment;	201	elf_segment_header_t *segment;
202	};	202	};
203	struct { /*< phys_backend members /	203	struct { /*< phys_backend members /
204	uintptr_t base;	204	uintptr_t base;
205	count_t frames;	205	count_t frames;
206	};	206	};
207	} mem_backend_data_t;	207	} mem_backend_data_t;
208		208
209	/** Address space area structure.	209	/** Address space area structure.
210	*	210	*
211	* Each as_area_t structure describes one contiguous area of virtual memory.	211	* Each as_area_t structure describes one contiguous area of virtual memory.
212	*/	212	*/
213	typedef struct {	213	typedef struct {
214	mutex_t lock;	214	mutex_t lock;
215	/** Containing address space. */	215	/** Containing address space. */
216	as_t *as;	216	as_t *as;
217	/**	217	/**
218	* Flags related to the memory represented by the address space area.	218	* Flags related to the memory represented by the address space area.
219	*/	219	*/
220	int flags;	220	int flags;
221	/** Attributes related to the address space area itself. */	221	/** Attributes related to the address space area itself. */
222	int attributes;	222	int attributes;
223	/** Size of this area in multiples of PAGE_SIZE. */	223	/** Size of this area in multiples of PAGE_SIZE. */
224	count_t pages;	224	count_t pages;
225	/** Base address of this area. */	225	/** Base address of this area. */
226	uintptr_t base;	226	uintptr_t base;
227	/** Map of used space. */	227	/** Map of used space. */
228	btree_t used_space;	228	btree_t used_space;
229		229
230	/**	230	/**
231	* If the address space area has been shared, this pointer will	231	* If the address space area has been shared, this pointer will
232	* reference the share info structure.	232	* reference the share info structure.
233	*/	233	*/
234	share_info_t *sh_info;	234	share_info_t *sh_info;
235		235
236	/** Memory backend backing this address space area. */	236	/** Memory backend backing this address space area. */
237	struct mem_backend *backend;	237	struct mem_backend *backend;
238		238
239	/** Data to be used by the backend. */	239	/** Data to be used by the backend. */
240	mem_backend_data_t backend_data;	240	mem_backend_data_t backend_data;
241	} as_area_t;	241	} as_area_t;
242		242
243	/** Address space area backend structure. */	243	/** Address space area backend structure. */
244	typedef struct mem_backend {	244	typedef struct mem_backend {
245	int (* page_fault)(as_area_t *area, uintptr_t addr, pf_access_t access);	245	int (* page_fault)(as_area_t *area, uintptr_t addr, pf_access_t access);
246	void (* frame_free)(as_area_t *area, uintptr_t page, uintptr_t frame);	246	void (* frame_free)(as_area_t *area, uintptr_t page, uintptr_t frame);
247	void (* share)(as_area_t *area);	247	void (* share)(as_area_t *area);
248	} mem_backend_t;	248	} mem_backend_t;
249		249
250	extern as_t *AS_KERNEL;	250	extern as_t *AS_KERNEL;
251		251
252	#ifndef __OBJC__	252	#ifndef __OBJC__
253	extern as_operations_t *as_operations;	253	extern as_operations_t *as_operations;
254	#endif	254	#endif
255		255
256	extern link_t inactive_as_with_asid_head;	256	extern link_t inactive_as_with_asid_head;
257		257
258	extern void as_init(void);	258	extern void as_init(void);
259		259
260	extern as_t *as_create(int flags);	260	extern as_t *as_create(int flags);
261	extern void as_destroy(as_t *as);	261	extern void as_destroy(as_t *as);
262	extern void as_switch(as_t old_as, as_t new_as);	262	extern void as_switch(as_t old_as, as_t new_as);
263	extern int as_page_fault(uintptr_t page, pf_access_t access, istate_t *istate);	263	extern int as_page_fault(uintptr_t page, pf_access_t access, istate_t *istate);
264		264
265	extern as_area_t as_area_create(as_t as, int flags, size_t size,	265	extern as_area_t as_area_create(as_t as, int flags, size_t size,
266	uintptr_t base, int attrs, mem_backend_t *backend,	266	uintptr_t base, int attrs, mem_backend_t *backend,
267	mem_backend_data_t *backend_data);	267	mem_backend_data_t *backend_data);
268	extern int as_area_destroy(as_t *as, uintptr_t address);	268	extern int as_area_destroy(as_t *as, uintptr_t address);
269	extern int as_area_resize(as_t *as, uintptr_t address, size_t size, int flags);	269	extern int as_area_resize(as_t *as, uintptr_t address, size_t size, int flags);
270	int as_area_share(as_t *src_as, uintptr_t src_base, size_t acc_size,	270	int as_area_share(as_t *src_as, uintptr_t src_base, size_t acc_size,
271	as_t *dst_as, uintptr_t dst_base, int dst_flags_mask);	271	as_t *dst_as, uintptr_t dst_base, int dst_flags_mask);
-		272	extern int as_area_change_flags(as_t *as, int flags, uintptr_t address);
272		273
273	extern int as_area_get_flags(as_area_t *area);	274	extern int as_area_get_flags(as_area_t *area);
274	extern bool as_area_check_access(as_area_t *area, pf_access_t access);	275	extern bool as_area_check_access(as_area_t *area, pf_access_t access);
275	extern size_t as_area_get_size(uintptr_t base);	276	extern size_t as_area_get_size(uintptr_t base);
276	extern int used_space_insert(as_area_t *a, uintptr_t page, count_t count);	277	extern int used_space_insert(as_area_t *a, uintptr_t page, count_t count);
277	extern int used_space_remove(as_area_t *a, uintptr_t page, count_t count);	278	extern int used_space_remove(as_area_t *a, uintptr_t page, count_t count);
278		279
279		280
280	/* Interface to be implemented by architectures. */	281	/* Interface to be implemented by architectures. */
281	#ifndef as_constructor_arch	282	#ifndef as_constructor_arch
282	extern int as_constructor_arch(as_t *as, int flags);	283	extern int as_constructor_arch(as_t *as, int flags);
283	#endif /* !def as_constructor_arch */	284	#endif /* !def as_constructor_arch */
284	#ifndef as_destructor_arch	285	#ifndef as_destructor_arch
285	extern int as_destructor_arch(as_t *as);	286	extern int as_destructor_arch(as_t *as);
286	#endif /* !def as_destructor_arch */	287	#endif /* !def as_destructor_arch */
287	#ifndef as_create_arch	288	#ifndef as_create_arch
288	extern int as_create_arch(as_t *as, int flags);	289	extern int as_create_arch(as_t *as, int flags);
289	#endif /* !def as_create_arch */	290	#endif /* !def as_create_arch */
290	#ifndef as_install_arch	291	#ifndef as_install_arch
291	extern void as_install_arch(as_t *as);	292	extern void as_install_arch(as_t *as);
292	#endif /* !def as_install_arch */	293	#endif /* !def as_install_arch */
293	#ifndef as_deinstall_arch	294	#ifndef as_deinstall_arch
294	extern void as_deinstall_arch(as_t *as);	295	extern void as_deinstall_arch(as_t *as);
295	#endif /* !def as_deinstall_arch */	296	#endif /* !def as_deinstall_arch */
296		297
297	/* Backend declarations and functions. */	298	/* Backend declarations and functions. */
298	extern mem_backend_t anon_backend;	299	extern mem_backend_t anon_backend;
299	extern mem_backend_t elf_backend;	300	extern mem_backend_t elf_backend;
300	extern mem_backend_t phys_backend;	301	extern mem_backend_t phys_backend;
301		302
-		303	/**
-		304	* This flags is passed when running the loader, otherwise elf_load()
-		305	* would return with a EE_LOADER error code.
-		306	*/
-		307	#define ELD_F_NONE 0
-		308	#define ELD_F_LOADER 1
-		309
302	extern unsigned int elf_load(elf_header_t header, as_t as);	310	extern unsigned int elf_load(elf_header_t header, as_t as, int flags);
303		311
304	/* Address space area related syscalls. */	312	/* Address space area related syscalls. */
305	extern unative_t sys_as_area_create(uintptr_t address, size_t size, int flags);	313	extern unative_t sys_as_area_create(uintptr_t address, size_t size, int flags);
306	extern unative_t sys_as_area_resize(uintptr_t address, size_t size, int flags);	314	extern unative_t sys_as_area_resize(uintptr_t address, size_t size, int flags);
-		315	extern unative_t sys_as_area_change_flags(uintptr_t address, int flags);
307	extern unative_t sys_as_area_destroy(uintptr_t address);	316	extern unative_t sys_as_area_destroy(uintptr_t address);
308		317
309	/* Introspection functions. */	318	/* Introspection functions. */
310	extern void as_print(as_t *as);	319	extern void as_print(as_t *as);
311		320
312	#endif /* KERNEL */	321	#endif /* KERNEL */
313		322
314	#endif	323	#endif
315		324
316	/** @}	325	/** @}
317	*/	326	*/
318		327

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(root)/trunk/kernel/generic/include/mm/as.h – Rev 2745 → 3222