WebSVN – HelenOS – 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 <mm/heap.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>
#include <arch/asm.h>
#include <debug.h>
#include <memstr.h>
#include <arch.h>
 
#define KAS_START_INDEX     PTL0_INDEX(KERNEL_ADDRESS_SPACE_START)
#define KAS_END_INDEX       PTL0_INDEX(KERNEL_ADDRESS_SPACE_END)
#define KAS_INDICES     (1+(KAS_END_INDEX-KAS_START_INDEX))
 
vm_t *vm_create(pte_t *ptl0)
{
    vm_t *m;
 
    m = (vm_t *) malloc(sizeof(vm_t));
    if (m) {
        spinlock_initialize(&m->lock);
        list_initialize(&m->vm_area_head);
 
        /*
         * Each vm_t is supposed to have its own page table.
         * It is either passed one or it has to allocate and set one up.
         */
        m->ptl0 = ptl0;
        if (!m->ptl0) {
            pte_t *src_ptl0, *dst_ptl0;
       
            src_ptl0 = (pte_t *) PA2KA((__address) GET_PTL0_ADDRESS());
            dst_ptl0 = (pte_t *) frame_alloc(FRAME_KA | FRAME_PANIC);
 
            /* TODO: in theory, it should be only necessary to copy kernel address space... */
            memcpy((void *)PA2KA((__address) dst_ptl0), (void *)GET_PTL0_ADDRESS() , PAGE_SIZE);
 
            m->ptl0 = (pte_t *) KA2PA((__address) dst_ptl0);
        }
    }
 
    return m;
}
 
void vm_destroy(vm_t *m)
{
}
 
vm_area_t *vm_area_create(vm_t *m, vm_type_t type, size_t size, __address addr)
{
    pri_t pri;
    vm_area_t *a;
   
    if (addr % PAGE_SIZE)
        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, vm_t *m)
{
    int i, flags;
    pri_t pri;
   
    pri = cpu_priority_high();
    spinlock_lock(&m->lock);
    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("unexpected vm_type_t %d", a->type);
    }
 
    ASSERT(m->ptl0);
    for (i=0; i<a->size; i++)
        map_page_to_frame(a->address + i*PAGE_SIZE, a->mapping[i], flags, (__address) m->ptl0);
       
    spinlock_unlock(&a->lock);
    spinlock_unlock(&m->lock);
    cpu_priority_restore(pri);
}
 
void vm_area_unmap(vm_area_t *a, vm_t *m)
{
    int i;
    pri_t pri;
   
    pri = cpu_priority_high();
    spinlock_lock(&m->lock);
    spinlock_lock(&a->lock);
 
    ASSERT(m->ptl0);
    for (i=0; i<a->size; i++)      
        map_page_to_frame(a->address + i*PAGE_SIZE, 0, PAGE_NOT_PRESENT, (__address) m->ptl0);
   
    spinlock_unlock(&a->lock);
    spinlock_unlock(&m->lock);
    cpu_priority_restore(pri);
}
 
void vm_install(vm_t *m)
{
    link_t *l;
    pri_t pri;
   
    pri = cpu_priority_high();
 
    tlb_shootdown_start();
    spinlock_lock(&m->lock);
 
    ASSERT(m->ptl0);
    SET_PTL0_ADDRESS(m->ptl0);
 
    spinlock_unlock(&m->lock);
    tlb_shootdown_finalize();
 
    cpu_priority_restore(pri);
}
 

Rev 205	Rev 227
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 <mm/heap.h>	33	#include <mm/heap.h>
34	#include <arch/mm/page.h>	34	#include <arch/mm/page.h>
35	#include <arch/types.h>	35	#include <arch/types.h>
36	#include <typedefs.h>	36	#include <typedefs.h>
37	#include <synch/spinlock.h>	37	#include <synch/spinlock.h>
38	#include <config.h>	38	#include <config.h>
39	#include <list.h>	39	#include <list.h>
40	#include <panic.h>	40	#include <panic.h>
41	#include <arch/asm.h>	41	#include <arch/asm.h>
42	#include <debug.h>	42	#include <debug.h>
43	#include <memstr.h>	43	#include <memstr.h>
44	#include <arch.h>	44	#include <arch.h>
45		45
46	#define KAS_START_INDEX PTL0_INDEX(KERNEL_ADDRESS_SPACE_START)	46	#define KAS_START_INDEX PTL0_INDEX(KERNEL_ADDRESS_SPACE_START)
47	#define KAS_END_INDEX PTL0_INDEX(KERNEL_ADDRESS_SPACE_END)	47	#define KAS_END_INDEX PTL0_INDEX(KERNEL_ADDRESS_SPACE_END)
48	#define KAS_INDICES (1+(KAS_END_INDEX-KAS_START_INDEX))	48	#define KAS_INDICES (1+(KAS_END_INDEX-KAS_START_INDEX))
49		49
50	vm_t vm_create(pte_t ptl0)	50	vm_t vm_create(pte_t ptl0)
51	{	51	{
52	vm_t *m;	52	vm_t *m;
53		53
54	m = (vm_t *) malloc(sizeof(vm_t));	54	m = (vm_t *) malloc(sizeof(vm_t));
55	if (m) {	55	if (m) {
56	spinlock_initialize(&m->lock);	56	spinlock_initialize(&m->lock);
57	list_initialize(&m->vm_area_head);	57	list_initialize(&m->vm_area_head);
58		58
59	/*	59	/*
60	* Each vm_t is supposed to have its own page table.	60	* Each vm_t is supposed to have its own page table.
61	* It is either passed one or it has to allocate and set one up.	61	* It is either passed one or it has to allocate and set one up.
62	*/	62	*/
63	m->ptl0 = ptl0;	63	m->ptl0 = ptl0;
64	if (!m->ptl0) {	64	if (!m->ptl0) {
65	pte_t src_ptl0, dst_ptl0;	65	pte_t src_ptl0, dst_ptl0;
66		66
67	src_ptl0 = (pte_t *) PA2KA((__address) GET_PTL0_ADDRESS());	67	src_ptl0 = (pte_t *) PA2KA((__address) GET_PTL0_ADDRESS());
68	dst_ptl0 = (pte_t *) frame_alloc(FRAME_KA \| FRAME_PANIC);	68	dst_ptl0 = (pte_t *) frame_alloc(FRAME_KA \| FRAME_PANIC);
-		69
-		70	/* TODO: in theory, it should be only necessary to copy kernel address space... */
69	memcpy((void )PA2KA((__address) dst_ptl0), (void )GET_PTL0_ADDRESS() , PAGE_SIZE);	71	memcpy((void )PA2KA((__address) dst_ptl0), (void )GET_PTL0_ADDRESS() , PAGE_SIZE);
-		72
70	m->ptl0 = (pte_t *) KA2PA((__address) dst_ptl0);	73	m->ptl0 = (pte_t *) KA2PA((__address) dst_ptl0);
71	}	74	}
72	}	75	}
73		76
74	return m;	77	return m;
75	}	78	}
76		79
77	void vm_destroy(vm_t *m)	80	void vm_destroy(vm_t *m)
78	{	81	{
79	}	82	}
80		83
81	vm_area_t vm_area_create(vm_t m, vm_type_t type, size_t size, __address addr)	84	vm_area_t vm_area_create(vm_t m, vm_type_t type, size_t size, __address addr)
82	{	85	{
83	pri_t pri;	86	pri_t pri;
84	vm_area_t *a;	87	vm_area_t *a;
85		88
86	if (addr % PAGE_SIZE)	89	if (addr % PAGE_SIZE)
87	panic("addr not aligned to a page boundary");	90	panic("addr not aligned to a page boundary");
88		91
89	pri = cpu_priority_high();	92	pri = cpu_priority_high();
90	spinlock_lock(&m->lock);	93	spinlock_lock(&m->lock);
91		94
92	/*	95	/*
93	* TODO: test vm_area which is to be created doesn't overlap with an existing one.	96	* TODO: test vm_area which is to be created doesn't overlap with an existing one.
94	*/	97	*/
95		98
96	a = (vm_area_t *) malloc(sizeof(vm_area_t));	99	a = (vm_area_t *) malloc(sizeof(vm_area_t));
97	if (a) {	100	if (a) {
98	int i;	101	int i;
99		102
100	a->mapping = (__address ) malloc(size sizeof(__address));	103	a->mapping = (__address ) malloc(size sizeof(__address));
101	if (!a->mapping) {	104	if (!a->mapping) {
102	free(a);	105	free(a);
103	spinlock_unlock(&m->lock);	106	spinlock_unlock(&m->lock);
104	cpu_priority_restore(pri);	107	cpu_priority_restore(pri);
105	return NULL;	108	return NULL;
106	}	109	}
107		110
108	for (i=0; i<size; i++)	111	for (i=0; i<size; i++)
109	a->mapping[i] = frame_alloc(0);	112	a->mapping[i] = frame_alloc(0);
110		113
111	spinlock_initialize(&a->lock);	114	spinlock_initialize(&a->lock);
112		115
113	link_initialize(&a->link);	116	link_initialize(&a->link);
114	a->type = type;	117	a->type = type;
115	a->size = size;	118	a->size = size;
116	a->address = addr;	119	a->address = addr;
117		120
118	list_append(&a->link, &m->vm_area_head);	121	list_append(&a->link, &m->vm_area_head);
119		122
120	}	123	}
121		124
122	spinlock_unlock(&m->lock);	125	spinlock_unlock(&m->lock);
123	cpu_priority_restore(pri);	126	cpu_priority_restore(pri);
124		127
125	return a;	128	return a;
126	}	129	}
127		130
128	void vm_area_destroy(vm_area_t *a)	131	void vm_area_destroy(vm_area_t *a)
129	{	132	{
130	}	133	}
131		134
132	void vm_area_map(vm_area_t a, vm_t m)	135	void vm_area_map(vm_area_t a, vm_t m)
133	{	136	{
134	int i, flags;	137	int i, flags;
135	pri_t pri;	138	pri_t pri;
136		139
137	pri = cpu_priority_high();	140	pri = cpu_priority_high();
138	spinlock_lock(&m->lock);	141	spinlock_lock(&m->lock);
139	spinlock_lock(&a->lock);	142	spinlock_lock(&a->lock);
140		143
141	switch (a->type) {	144	switch (a->type) {
142	case VMA_TEXT:	145	case VMA_TEXT:
143	flags = PAGE_EXEC \| PAGE_READ \| PAGE_USER \| PAGE_PRESENT \| PAGE_CACHEABLE;	146	flags = PAGE_EXEC \| PAGE_READ \| PAGE_USER \| PAGE_PRESENT \| PAGE_CACHEABLE;
144	break;	147	break;
145	case VMA_DATA:	148	case VMA_DATA:
146	case VMA_STACK:	149	case VMA_STACK:
147	flags = PAGE_READ \| PAGE_WRITE \| PAGE_USER \| PAGE_PRESENT \| PAGE_CACHEABLE;	150	flags = PAGE_READ \| PAGE_WRITE \| PAGE_USER \| PAGE_PRESENT \| PAGE_CACHEABLE;
148	break;	151	break;
149	default:	152	default:
150	panic("unexpected vm_type_t %d", a->type);	153	panic("unexpected vm_type_t %d", a->type);
151	}	154	}
152		155
153	ASSERT(m->ptl0);	156	ASSERT(m->ptl0);
154	for (i=0; i<a->size; i++)	157	for (i=0; i<a->size; i++)
155	map_page_to_frame(a->address + i*PAGE_SIZE, a->mapping[i], flags, (__address) m->ptl0);	158	map_page_to_frame(a->address + i*PAGE_SIZE, a->mapping[i], flags, (__address) m->ptl0);
156		159
157	spinlock_unlock(&a->lock);	160	spinlock_unlock(&a->lock);
158	spinlock_unlock(&m->lock);	161	spinlock_unlock(&m->lock);
159	cpu_priority_restore(pri);	162	cpu_priority_restore(pri);
160	}	163	}
161		164
162	void vm_area_unmap(vm_area_t a, vm_t m)	165	void vm_area_unmap(vm_area_t a, vm_t m)
163	{	166	{
164	int i;	167	int i;
165	pri_t pri;	168	pri_t pri;
166		169
167	pri = cpu_priority_high();	170	pri = cpu_priority_high();
168	spinlock_lock(&m->lock);	171	spinlock_lock(&m->lock);
169	spinlock_lock(&a->lock);	172	spinlock_lock(&a->lock);
170		173
171	ASSERT(m->ptl0);	174	ASSERT(m->ptl0);
172	for (i=0; i<a->size; i++)	175	for (i=0; i<a->size; i++)
173	map_page_to_frame(a->address + i*PAGE_SIZE, 0, PAGE_NOT_PRESENT, (__address) m->ptl0);	176	map_page_to_frame(a->address + i*PAGE_SIZE, 0, PAGE_NOT_PRESENT, (__address) m->ptl0);
174		177
175	spinlock_unlock(&a->lock);	178	spinlock_unlock(&a->lock);
176	spinlock_unlock(&m->lock);	179	spinlock_unlock(&m->lock);
177	cpu_priority_restore(pri);	180	cpu_priority_restore(pri);
178	}	181	}
179		182
180	void vm_install(vm_t *m)	183	void vm_install(vm_t *m)
181	{	184	{
182	link_t *l;	185	link_t *l;
183	pri_t pri;	186	pri_t pri;
184		187
185	pri = cpu_priority_high();	188	pri = cpu_priority_high();
186		189
187	tlb_shootdown_start();	190	tlb_shootdown_start();
188	spinlock_lock(&m->lock);	191	spinlock_lock(&m->lock);
189		192
190	ASSERT(m->ptl0);	193	ASSERT(m->ptl0);
191	SET_PTL0_ADDRESS(m->ptl0);	194	SET_PTL0_ADDRESS(m->ptl0);
192		195
193	spinlock_unlock(&m->lock);	196	spinlock_unlock(&m->lock);
194	tlb_shootdown_finalize();	197	tlb_shootdown_finalize();
195		198
196	cpu_priority_restore(pri);	199	cpu_priority_restore(pri);
197	}	200	}
198		201

Subversion Repositories HelenOS

(root)/SPARTAN/trunk/src/mm/vm.c – Rev 205 → 227