WebSVN – HelenOS – Diff – /branches/rcu/kernel/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 <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(uintptr_t 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 | PAGE_WRITE);
 
}
 
/** 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, uintptr_t page, uintptr_t 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, uintptr_t 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, uintptr_t page)
{
    ASSERT(page_mapping_operations);
    ASSERT(page_mapping_operations->mapping_find);
 
    return page_mapping_operations->mapping_find(as, page);
}
 
/** @}
 */
 

Subversion Repositories HelenOS

(root)/branches/rcu/kernel/generic/src/mm/page.c – Rev 2131 → 2307

Rev 2131		Rev 2307
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 <arch/asm.h>	49	#include <arch/asm.h>
50	#include <memstr.h>	50	#include <memstr.h>
51	#include <debug.h>	51	#include <debug.h>
52	#include <arch.h>	52	#include <arch.h>
53		53
54	/** Virtual operations for page subsystem. */	54	/** Virtual operations for page subsystem. */
55	page_mapping_operations_t *page_mapping_operations = NULL;	55	page_mapping_operations_t *page_mapping_operations = NULL;
56		56
57	void page_init(void)	57	void page_init(void)
58	{	58	{
59	page_arch_init();	59	page_arch_init();
60	}	60	}
61		61
62	/** Map memory structure	62	/** Map memory structure
63	*	63	*
64	* Identity-map memory structure	64	* Identity-map memory structure
65	* considering possible crossings	65	* considering possible crossings
66	* of page boundaries.	66	* of page boundaries.
67	*	67	*
68	* @param s Address of the structure.	68	* @param s Address of the structure.
69	* @param size Size of the structure.	69	* @param size Size of the structure.
70	*/	70	*/
71	void map_structure(uintptr_t s, size_t size)	71	void map_structure(uintptr_t s, size_t size)
72	{	72	{
73	int i, cnt, length;	73	int i, cnt, length;
74		74
75	length = size + (s - (s & ~(PAGE_SIZE - 1)));	75	length = size + (s - (s & ~(PAGE_SIZE - 1)));
76	cnt = length / PAGE_SIZE + (length % PAGE_SIZE > 0);	76	cnt = length / PAGE_SIZE + (length % PAGE_SIZE > 0);
77		77
78	for (i = 0; i < cnt; i++)	78	for (i = 0; i < cnt; i++)
79	page_mapping_insert(AS_KERNEL, s + i * PAGE_SIZE, s + i * PAGE_SIZE, PAGE_NOT_CACHEABLE);	79	page_mapping_insert(AS_KERNEL, s + i * PAGE_SIZE, s + i * PAGE_SIZE, PAGE_NOT_CACHEABLE \| PAGE_WRITE);
80		80
81	}	81	}
82		82
83	/** Insert mapping of page to frame.	83	/** Insert mapping of page to frame.
84	*	84	*
85	* Map virtual address page to physical address frame	85	* Map virtual address page to physical address frame
86	* using flags. Allocate and setup any missing page tables.	86	* using flags. Allocate and setup any missing page tables.
87	*	87	*
88	* The page table must be locked and interrupts must be disabled.	88	* The page table must be locked and interrupts must be disabled.
89	*	89	*
90	* @param as Address space to wich page belongs.	90	* @param as Address space to wich page belongs.
91	* @param page Virtual address of the page to be mapped.	91	* @param page Virtual address of the page to be mapped.
92	* @param frame Physical address of memory frame to which the mapping is done.	92	* @param frame Physical address of memory frame to which the mapping is done.
93	* @param flags Flags to be used for mapping.	93	* @param flags Flags to be used for mapping.
94	*/	94	*/
95	void page_mapping_insert(as_t *as, uintptr_t page, uintptr_t frame, int flags)	95	void page_mapping_insert(as_t *as, uintptr_t page, uintptr_t frame, int flags)
96	{	96	{
97	ASSERT(page_mapping_operations);	97	ASSERT(page_mapping_operations);
98	ASSERT(page_mapping_operations->mapping_insert);	98	ASSERT(page_mapping_operations->mapping_insert);
99		99
100	page_mapping_operations->mapping_insert(as, page, frame, flags);	100	page_mapping_operations->mapping_insert(as, page, frame, flags);
101	}	101	}
102		102
103	/** Remove mapping of page.	103	/** Remove mapping of page.
104	*	104	*
105	* Remove any mapping of page within address space as.	105	* Remove any mapping of page within address space as.
106	* TLB shootdown should follow in order to make effects of	106	* TLB shootdown should follow in order to make effects of
107	* this call visible.	107	* this call visible.
108	*	108	*
109	* The page table must be locked and interrupts must be disabled.	109	* The page table must be locked and interrupts must be disabled.
110	*	110	*
111	* @param as Address space to wich page belongs.	111	* @param as Address space to wich page belongs.
112	* @param page Virtual address of the page to be demapped.	112	* @param page Virtual address of the page to be demapped.
113	*/	113	*/
114	void page_mapping_remove(as_t *as, uintptr_t page)	114	void page_mapping_remove(as_t *as, uintptr_t page)
115	{	115	{
116	ASSERT(page_mapping_operations);	116	ASSERT(page_mapping_operations);
117	ASSERT(page_mapping_operations->mapping_remove);	117	ASSERT(page_mapping_operations->mapping_remove);
118		118
119	page_mapping_operations->mapping_remove(as, page);	119	page_mapping_operations->mapping_remove(as, page);
120	}	120	}
121		121
122	/** Find mapping for virtual page	122	/** Find mapping for virtual page
123	*	123	*
124	* Find mapping for virtual page.	124	* Find mapping for virtual page.
125	*	125	*
126	* The page table must be locked and interrupts must be disabled.	126	* The page table must be locked and interrupts must be disabled.
127	*	127	*
128	* @param as Address space to wich page belongs.	128	* @param as Address space to wich page belongs.
129	* @param page Virtual page.	129	* @param page Virtual page.
130	*	130	*
131	* @return NULL if there is no such mapping; requested mapping otherwise.	131	* @return NULL if there is no such mapping; requested mapping otherwise.
132	*/	132	*/
133	pte_t page_mapping_find(as_t as, uintptr_t page)	133	pte_t page_mapping_find(as_t as, uintptr_t page)
134	{	134	{
135	ASSERT(page_mapping_operations);	135	ASSERT(page_mapping_operations);
136	ASSERT(page_mapping_operations->mapping_find);	136	ASSERT(page_mapping_operations->mapping_find);
137		137
138	return page_mapping_operations->mapping_find(as, page);	138	return page_mapping_operations->mapping_find(as, page);
139	}	139	}
140		140
141	/** @}	141	/** @}
142	*/	142	*/
143		143