WebSVN – HelenOS-historic – Diff – /kernel/trunk/generic/src/mm/page.c


/*
 * Copyright (C) 2001-2006 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
 * @brief   Virtual Address Translation subsystem.
 *
 * This file contains code for creating, destroying and searching
 * mappings between virtual addresses and physical addresses.
 * Functions here are mere wrappers that call the real implementation.
 * They however, define the single interface.
 */
 
#include <mm/page.h>
#include <arch/mm/page.h>
#include <arch/mm/asid.h>
#include <mm/as.h>
#include <mm/frame.h>
#include <arch/types.h>
#include <typedefs.h>
#include <arch/asm.h>
#include <memstr.h>
#include <debug.h>
#include <arch.h>
 
/** Virtual operations for page subsystem. */
page_mapping_operations_t *page_mapping_operations = NULL;
 
void page_init(void)
{
    page_arch_init();
}
 
/** Map memory structure
 *
 * Identity-map memory structure
 * considering possible crossings
 * of page boundaries.
 *
 * @param s Address of the structure.
 * @param size Size of the structure.
 */
void map_structure(__address s, size_t size)
{
    int i, cnt, length;
 
    length = size + (s - (s & ~(PAGE_SIZE - 1)));
    cnt = length / PAGE_SIZE + (length % PAGE_SIZE > 0);
 
    for (i = 0; i < cnt; i++)
        page_mapping_insert(AS_KERNEL, s + i * PAGE_SIZE, s + i * PAGE_SIZE, PAGE_NOT_CACHEABLE);
 
}
 
/** Insert mapping of page to frame.
 *
 * Map virtual address page to physical address frame
 * using flags. Allocate and setup any missing page tables.
 *
 * The page table must be locked and interrupts must be disabled.
 *
 * @param as Address space to wich page belongs.
 * @param page Virtual address of the page to be mapped.
 * @param frame Physical address of memory frame to which the mapping is done.
 * @param flags Flags to be used for mapping.
 */
void page_mapping_insert(as_t *as, __address page, __address frame, int flags)
{
    ASSERT(page_mapping_operations);
    ASSERT(page_mapping_operations->mapping_insert);
   
    page_mapping_operations->mapping_insert(as, page, frame, flags);
}
 
/** Remove mapping of page.
 *
 * Remove any mapping of page within address space as.
 * TLB shootdown should follow in order to make effects of
 * this call visible.
 *
 * The page table must be locked and interrupts must be disabled.
 *
 * @param as Address space to wich page belongs.
 * @param page Virtual address of the page to be demapped.
 */
void page_mapping_remove(as_t *as, __address page)
{
    ASSERT(page_mapping_operations);
    ASSERT(page_mapping_operations->mapping_remove);
   
    page_mapping_operations->mapping_remove(as, page);
}
 
/** Find mapping for virtual page
 *
 * Find mapping for virtual page.
 *
 * The page table must be locked and interrupts must be disabled.
 *
 * @param as Address space to wich page belongs.
 * @param page Virtual page.
 *
 * @return NULL if there is no such mapping; requested mapping otherwise.
 */
pte_t *page_mapping_find(as_t *as, __address page)
{
    ASSERT(page_mapping_operations);
    ASSERT(page_mapping_operations->mapping_find);
 
    return page_mapping_operations->mapping_find(as, page);
}
 
/** @}
 */
 
 

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/generic/src/mm/page.c – Rev 1702 → 1757

Rev 1702		Rev 1757
1	/*	1	/*
2	* Copyright (C) 2001-2006 Jakub Jermar	2	* Copyright (C) 2001-2006 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		32
33	/**	33	/**
34	* @file	34	* @file
35	* @brief Virtual Address Translation subsystem.	35	* @brief Virtual Address Translation subsystem.
36	*	36	*
37	* This file contains code for creating, destroying and searching	37	* This file contains code for creating, destroying and searching
38	* mappings between virtual addresses and physical addresses.	38	* mappings between virtual addresses and physical addresses.
39	* Functions here are mere wrappers that call the real implementation.	39	* Functions here are mere wrappers that call the real implementation.
40	* They however, define the single interface.	40	* They however, define the single interface.
41	*/	41	*/
42		42
43	#include <mm/page.h>	43	#include <mm/page.h>
44	#include <arch/mm/page.h>	44	#include <arch/mm/page.h>
45	#include <arch/mm/asid.h>	45	#include <arch/mm/asid.h>
46	#include <mm/as.h>	46	#include <mm/as.h>
47	#include <mm/frame.h>	47	#include <mm/frame.h>
48	#include <arch/types.h>	48	#include <arch/types.h>
49	#include <typedefs.h>	49	#include <typedefs.h>
50	#include <arch/asm.h>	50	#include <arch/asm.h>
51	#include <memstr.h>	51	#include <memstr.h>
52	#include <debug.h>	52	#include <debug.h>
53	#include <arch.h>	53	#include <arch.h>
54		54
55	/** Virtual operations for page subsystem. */	55	/** Virtual operations for page subsystem. */
56	page_mapping_operations_t *page_mapping_operations = NULL;	56	page_mapping_operations_t *page_mapping_operations = NULL;
57		57
58	void page_init(void)	58	void page_init(void)
59	{	59	{
60	page_arch_init();	60	page_arch_init();
61	}	61	}
62		62
63	/** Map memory structure	63	/** Map memory structure
64	*	64	*
65	* Identity-map memory structure	65	* Identity-map memory structure
66	* considering possible crossings	66	* considering possible crossings
67	* of page boundaries.	67	* of page boundaries.
68	*	68	*
69	* @param s Address of the structure.	69	* @param s Address of the structure.
70	* @param size Size of the structure.	70	* @param size Size of the structure.
71	*/	71	*/
72	void map_structure(__address s, size_t size)	72	void map_structure(__address s, size_t size)
73	{	73	{
74	int i, cnt, length;	74	int i, cnt, length;
75		75
76	length = size + (s - (s & ~(PAGE_SIZE - 1)));	76	length = size + (s - (s & ~(PAGE_SIZE - 1)));
77	cnt = length / PAGE_SIZE + (length % PAGE_SIZE > 0);	77	cnt = length / PAGE_SIZE + (length % PAGE_SIZE > 0);
78		78
79	for (i = 0; i < cnt; i++)	79	for (i = 0; i < cnt; i++)
80	page_mapping_insert(AS_KERNEL, s + i * PAGE_SIZE, s + i * PAGE_SIZE, PAGE_NOT_CACHEABLE);	80	page_mapping_insert(AS_KERNEL, s + i * PAGE_SIZE, s + i * PAGE_SIZE, PAGE_NOT_CACHEABLE);
81		81
82	}	82	}
83		83
84	/** Insert mapping of page to frame.	84	/** Insert mapping of page to frame.
85	*	85	*
86	* Map virtual address page to physical address frame	86	* Map virtual address page to physical address frame
87	* using flags. Allocate and setup any missing page tables.	87	* using flags. Allocate and setup any missing page tables.
88	*	88	*
89	* The page table must be locked and interrupts must be disabled.	89	* The page table must be locked and interrupts must be disabled.
90	*	90	*
91	* @param as Address space to wich page belongs.	91	* @param as Address space to wich page belongs.
92	* @param page Virtual address of the page to be mapped.	92	* @param page Virtual address of the page to be mapped.
93	* @param frame Physical address of memory frame to which the mapping is done.	93	* @param frame Physical address of memory frame to which the mapping is done.
94	* @param flags Flags to be used for mapping.	94	* @param flags Flags to be used for mapping.
95	*/	95	*/
96	void page_mapping_insert(as_t *as, __address page, __address frame, int flags)	96	void page_mapping_insert(as_t *as, __address page, __address frame, int flags)
97	{	97	{
98	ASSERT(page_mapping_operations);	98	ASSERT(page_mapping_operations);
99	ASSERT(page_mapping_operations->mapping_insert);	99	ASSERT(page_mapping_operations->mapping_insert);
100		100
101	page_mapping_operations->mapping_insert(as, page, frame, flags);	101	page_mapping_operations->mapping_insert(as, page, frame, flags);
102	}	102	}
103		103
104	/** Remove mapping of page.	104	/** Remove mapping of page.
105	*	105	*
106	* Remove any mapping of page within address space as.	106	* Remove any mapping of page within address space as.
107	* TLB shootdown should follow in order to make effects of	107	* TLB shootdown should follow in order to make effects of
108	* this call visible.	108	* this call visible.
109	*	109	*
110	* The page table must be locked and interrupts must be disabled.	110	* The page table must be locked and interrupts must be disabled.
111	*	111	*
112	* @param as Address space to wich page belongs.	112	* @param as Address space to wich page belongs.
113	* @param page Virtual address of the page to be demapped.	113	* @param page Virtual address of the page to be demapped.
114	*/	114	*/
115	void page_mapping_remove(as_t *as, __address page)	115	void page_mapping_remove(as_t *as, __address page)
116	{	116	{
117	ASSERT(page_mapping_operations);	117	ASSERT(page_mapping_operations);
118	ASSERT(page_mapping_operations->mapping_remove);	118	ASSERT(page_mapping_operations->mapping_remove);
119		119
120	page_mapping_operations->mapping_remove(as, page);	120	page_mapping_operations->mapping_remove(as, page);
121	}	121	}
122		122
123	/** Find mapping for virtual page	123	/** Find mapping for virtual page
124	*	124	*
125	* Find mapping for virtual page.	125	* Find mapping for virtual page.
126	*	126	*
127	* The page table must be locked and interrupts must be disabled.	127	* The page table must be locked and interrupts must be disabled.
128	*	128	*
129	* @param as Address space to wich page belongs.	129	* @param as Address space to wich page belongs.
130	* @param page Virtual page.	130	* @param page Virtual page.
131	*	131	*
132	* @return NULL if there is no such mapping; requested mapping otherwise.	132	* @return NULL if there is no such mapping; requested mapping otherwise.
133	*/	133	*/
134	pte_t page_mapping_find(as_t as, __address page)	134	pte_t page_mapping_find(as_t as, __address page)
135	{	135	{
136	ASSERT(page_mapping_operations);	136	ASSERT(page_mapping_operations);
137	ASSERT(page_mapping_operations->mapping_find);	137	ASSERT(page_mapping_operations->mapping_find);
138		138
139	return page_mapping_operations->mapping_find(as, page);	139	return page_mapping_operations->mapping_find(as, page);
140	}	140	}
141		141
142	/** @}	142	/** @}
143	*/	143	*/
144		-
145		144