WebSVN – HelenOS-historic – Diff – /SPARTAN/trunk/src/mm/vm.c


/*
 * 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.
 */
 
#include <mm/vm.h>
#include <mm/page.h>
#include <mm/frame.h>
#include <mm/tlb.h>
#include <arch/mm/page.h>
#include <arch/types.h>
#include <typedefs.h>
#include <synch/spinlock.h>
#include <config.h>
#include <list.h>
#include <panic.h>
 
vm_t *vm_create(void)
{
    vm_t *m;
   
    m = (vm_t *) malloc(sizeof(vm_t));
    if (m) {
        spinlock_initialize(&m->lock);
        list_initialize(&m->vm_area_head);
    }
   
    return m;
}
 
void vm_destroy(vm_t *m)
{
}
 
vm_area_t *vm_area_create(vm_t *m, vm_type_t type, int size, __address addr)
{
    pri_t pri;
    vm_area_t *a;
   
    if (addr % PAGE_SIZE)
        panic(PANIC "addr not aligned to a page boundary");
   
    pri = cpu_priority_high();
    spinlock_lock(&m->lock);
   
    /*
     * TODO: test vm_area which is to be created doesn't overlap with an existing one.
     */
   
    a = (vm_area_t *) malloc(sizeof(vm_area_t));
    if (a) {
        int i;
   
        a->mapping = (__address *) malloc(size * sizeof(__address));
        if (!a->mapping) {
            free(a);
            spinlock_unlock(&m->lock);
            cpu_priority_restore(pri);
            return NULL;
        }
       
        for (i=0; i<size; i++)
            a->mapping[i] = frame_alloc(0);
       
        spinlock_initialize(&a->lock);
           
        link_initialize(&a->link);         
        a->type = type;
        a->size = size;
        a->address = addr;
       
        list_append(&a->link, &m->vm_area_head);
 
    }
 
    spinlock_unlock(&m->lock);
    cpu_priority_restore(pri);
   
    return a;
}
 
void vm_area_destroy(vm_area_t *a)
{
}
 
void vm_area_map(vm_area_t *a)
{
    int i, flags;
    pri_t pri;
   
    pri = cpu_priority_high();
    spinlock_lock(&a->lock);
 
    switch (a->type) {
        case VMA_TEXT:
            flags = PAGE_EXEC | PAGE_READ | PAGE_USER | PAGE_PRESENT | PAGE_CACHEABLE;
            break;
        case VMA_DATA:
        case VMA_STACK:
            flags = PAGE_READ | PAGE_WRITE | PAGE_USER | PAGE_PRESENT | PAGE_CACHEABLE;
            break;
        default:
            panic(PANIC "unexpected vm_type_t %d", a->type);
    }
   
    for (i=0; i<a->size; i++)
        map_page_to_frame(a->address + i*PAGE_SIZE, a->mapping[i], flags, 0);
       
    spinlock_unlock(&a->lock);
    cpu_priority_restore(pri);
}
 
void vm_area_unmap(vm_area_t *a)
{
    int i;
    pri_t pri;
   
    pri = cpu_priority_high();
    spinlock_lock(&a->lock);
 
    for (i=0; i<a->size; i++)      
        map_page_to_frame(a->address + i*PAGE_SIZE, 0, PAGE_NOT_PRESENT, 0);
   
    spinlock_unlock(&a->lock);
    cpu_priority_restore(pri);
}
 
void vm_install(vm_t *m)
{
    link_t *l;
    pri_t pri;
   
    pri = cpu_priority_high();
    spinlock_lock(&m->lock);
 
    for(l = m->vm_area_head.next; l != &m->vm_area_head; l = l->next)
        vm_area_map(list_get_instance(l, vm_area_t, link));
 
    spinlock_unlock(&m->lock);
    cpu_priority_restore(pri);
}
 
void vm_uninstall(vm_t *m)
{
    link_t *l;
    pri_t pri;
   
    pri = cpu_priority_high();
 
    tlb_shootdown_start();
 
    spinlock_lock(&m->lock);
 
    for(l = m->vm_area_head.next; l != &m->vm_area_head; l = l->next)
        vm_area_unmap(list_get_instance(l, vm_area_t, link));
 
    spinlock_unlock(&m->lock);
 
 
    tlb_shootdown_finalize();
 
    cpu_priority_restore(pri);
}
 

Rev 6	Rev 31
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	#include <mm/vm.h>	29	#include <mm/vm.h>
30	#include <mm/page.h>	30	#include <mm/page.h>
31	#include <mm/frame.h>	31	#include <mm/frame.h>
32	#include <mm/tlb.h>	32	#include <mm/tlb.h>
33	#include <arch/mm/page.h>	33	#include <arch/mm/page.h>
34	#include <arch/types.h>	34	#include <arch/types.h>
35	#include <typedefs.h>	35	#include <typedefs.h>
36	#include <synch/spinlock.h>	36	#include <synch/spinlock.h>
37	#include <config.h>	37	#include <config.h>
38	#include <list.h>	38	#include <list.h>
39	#include <panic.h>	39	#include <panic.h>
40		40
41	vm_t *vm_create(void)	41	vm_t *vm_create(void)
42	{	42	{
43	vm_t *m;	43	vm_t *m;
44		44
45	m = (vm_t *) malloc(sizeof(vm_t));	45	m = (vm_t *) malloc(sizeof(vm_t));
46	if (m) {	46	if (m) {
47	spinlock_initialize(&m->lock);	47	spinlock_initialize(&m->lock);
48	list_initialize(&m->vm_area_head);	48	list_initialize(&m->vm_area_head);
49	}	49	}
50		50
51	return m;	51	return m;
52	}	52	}
53		53
54	void vm_destroy(vm_t *m)	54	void vm_destroy(vm_t *m)
55	{	55	{
56	}	56	}
57		57
58	vm_area_t vm_area_create(vm_t m, vm_type_t type, int size, __address addr)	58	vm_area_t vm_area_create(vm_t m, vm_type_t type, int size, __address addr)
59	{	59	{
60	pri_t pri;	60	pri_t pri;
61	vm_area_t *a;	61	vm_area_t *a;
62		62
63	if (addr % PAGE_SIZE)	63	if (addr % PAGE_SIZE)
64	panic(PANIC "addr not aligned to a page boundary");	64	panic(PANIC "addr not aligned to a page boundary");
65		65
66	pri = cpu_priority_high();	66	pri = cpu_priority_high();
67	spinlock_lock(&m->lock);	67	spinlock_lock(&m->lock);
68		68
69	/*	69	/*
70	* TODO: test vm_area which is to be created doesn't overlap with an existing one.	70	* TODO: test vm_area which is to be created doesn't overlap with an existing one.
71	*/	71	*/
72		72
73	a = (vm_area_t *) malloc(sizeof(vm_area_t));	73	a = (vm_area_t *) malloc(sizeof(vm_area_t));
74	if (a) {	74	if (a) {
75	int i;	75	int i;
76		76
77	a->mapping = (__address ) malloc(size sizeof(__address));	77	a->mapping = (__address ) malloc(size sizeof(__address));
78	if (!a->mapping) {	78	if (!a->mapping) {
79	free(a);	79	free(a);
80	spinlock_unlock(&m->lock);	80	spinlock_unlock(&m->lock);
81	cpu_priority_restore(pri);	81	cpu_priority_restore(pri);
82	return NULL;	82	return NULL;
83	}	83	}
84		84
85	for (i=0; i<size; i++)	85	for (i=0; i<size; i++)
86	a->mapping[i] = frame_alloc(0);	86	a->mapping[i] = frame_alloc(0);
87		87
88	spinlock_initialize(&a->lock);	88	spinlock_initialize(&a->lock);
89		89
90	link_initialize(&a->link);	90	link_initialize(&a->link);
91	a->type = type;	91	a->type = type;
92	a->size = size;	92	a->size = size;
93	a->address = addr;	93	a->address = addr;
94		94
95	list_append(&a->link, &m->vm_area_head);	95	list_append(&a->link, &m->vm_area_head);
96		96
97	}	97	}
98		98
99	spinlock_unlock(&m->lock);	99	spinlock_unlock(&m->lock);
100	cpu_priority_restore(pri);	100	cpu_priority_restore(pri);
101		101
102	return a;	102	return a;
103	}	103	}
104		104
105	void vm_area_destroy(vm_area_t *a)	105	void vm_area_destroy(vm_area_t *a)
106	{	106	{
107	}	107	}
108		108
109	void vm_area_map(vm_area_t *a)	109	void vm_area_map(vm_area_t *a)
110	{	110	{
111	int i, flags;	111	int i, flags;
112	pri_t pri;	112	pri_t pri;
113		113
114	pri = cpu_priority_high();	114	pri = cpu_priority_high();
115	spinlock_lock(&a->lock);	115	spinlock_lock(&a->lock);
116		116
117	switch (a->type) {	117	switch (a->type) {
118	case VMA_TEXT:	118	case VMA_TEXT:
119	flags = PAGE_EXEC \| PAGE_READ \| PAGE_USER \| PAGE_PRESENT \| PAGE_CACHEABLE;	119	flags = PAGE_EXEC \| PAGE_READ \| PAGE_USER \| PAGE_PRESENT \| PAGE_CACHEABLE;
120	break;	120	break;
121	case VMA_DATA:	121	case VMA_DATA:
122	case VMA_STACK:	122	case VMA_STACK:
123	flags = PAGE_READ \| PAGE_WRITE \| PAGE_USER \| PAGE_PRESENT \| PAGE_CACHEABLE;	123	flags = PAGE_READ \| PAGE_WRITE \| PAGE_USER \| PAGE_PRESENT \| PAGE_CACHEABLE;
124	break;	124	break;
125	default:	125	default:
126	panic(PANIC "unexpected vm_type_t %d", a->type);	126	panic(PANIC "unexpected vm_type_t %d", a->type);
127	}	127	}
128		128
129	for (i=0; i<a->size; i++)	129	for (i=0; i<a->size; i++)
130	map_page_to_frame(a->address + i*PAGE_SIZE, a->mapping[i], flags, 0);	130	map_page_to_frame(a->address + i*PAGE_SIZE, a->mapping[i], flags, 0);
131		131
132	spinlock_unlock(&a->lock);	132	spinlock_unlock(&a->lock);
133	cpu_priority_restore(pri);	133	cpu_priority_restore(pri);
134	}	134	}
135		135
136	void vm_area_unmap(vm_area_t *a)	136	void vm_area_unmap(vm_area_t *a)
137	{	137	{
138	int i;	138	int i;
139	pri_t pri;	139	pri_t pri;
140		140
141	pri = cpu_priority_high();	141	pri = cpu_priority_high();
142	spinlock_lock(&a->lock);	142	spinlock_lock(&a->lock);
143		143
144	for (i=0; i<a->size; i++)	144	for (i=0; i<a->size; i++)
145	map_page_to_frame(a->address + i*PAGE_SIZE, 0, PAGE_NOT_PRESENT, 0);	145	map_page_to_frame(a->address + i*PAGE_SIZE, 0, PAGE_NOT_PRESENT, 0);
146		146
147	spinlock_unlock(&a->lock);	147	spinlock_unlock(&a->lock);
148	cpu_priority_restore(pri);	148	cpu_priority_restore(pri);
149	}	149	}
150		150
151	void vm_install(vm_t *m)	151	void vm_install(vm_t *m)
152	{	152	{
153	link_t *l;	153	link_t *l;
154	pri_t pri;	154	pri_t pri;
155		155
156	pri = cpu_priority_high();	156	pri = cpu_priority_high();
157	spinlock_lock(&m->lock);	157	spinlock_lock(&m->lock);
158		158
159	for(l = m->vm_area_head.next; l != &m->vm_area_head; l = l->next)	159	for(l = m->vm_area_head.next; l != &m->vm_area_head; l = l->next)
160	vm_area_map(list_get_instance(l, vm_area_t, link));	160	vm_area_map(list_get_instance(l, vm_area_t, link));
161		161
162	spinlock_unlock(&m->lock);	162	spinlock_unlock(&m->lock);
163	cpu_priority_restore(pri);	163	cpu_priority_restore(pri);
164	}	164	}
165		165
166	void vm_uninstall(vm_t *m)	166	void vm_uninstall(vm_t *m)
167	{	167	{
168	link_t *l;	168	link_t *l;
169	pri_t pri;	169	pri_t pri;
170		170
171	pri = cpu_priority_high();	171	pri = cpu_priority_high();
172		172
173	tlb_shootdown_start();	173	tlb_shootdown_start();
174		174
175	spinlock_lock(&m->lock);	175	spinlock_lock(&m->lock);
176		176
177	for(l = m->vm_area_head.next; l != &m->vm_area_head; l = l->next)	177	for(l = m->vm_area_head.next; l != &m->vm_area_head; l = l->next)
178	vm_area_unmap(list_get_instance(l, vm_area_t, link));	178	vm_area_unmap(list_get_instance(l, vm_area_t, link));
179		179
180	spinlock_unlock(&m->lock);	180	spinlock_unlock(&m->lock);
181		181
182	tlb_invalidate(0);	-
183	tlb_shootdown_finalize();	182	tlb_shootdown_finalize();
184		183
185	cpu_priority_restore(pri);	184	cpu_priority_restore(pri);
186	}	185	}
187		186

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(root)/SPARTAN/trunk/src/mm/vm.c – Rev 6 → 31