WebSVN – HelenOS-historic – Diff – /SPARTAN/trunk/arch/amd64/src/mm/page.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/page.h>
#include <mm/frame.h>
#include <arch/mm/page.h>
#include <arch/interrupt.h>
#include <arch/asm.h>
#include <config.h>
 
#include <memstr.h>
 
 
__address bootstrap_dba;
 
void page_arch_init(void)
{
    __address dba;
    count_t i;
 
    if (config.cpu_active == 1) {
        dba = frame_alloc(FRAME_KA | FRAME_PANIC);
        memsetb(dba, PAGE_SIZE, 0);
 
        bootstrap_dba = dba;
 
        /*
         * PA2KA(identity) mapping for all frames.
         */
        for (i = 0; i < config.memory_size/FRAME_SIZE; i++) {
            page_mapping_insert(PA2KA(i * PAGE_SIZE), i * PAGE_SIZE, PAGE_CACHEABLE | PAGE_EXEC, KA2PA(dba));
        }
 
        trap_register(14, page_fault);
        write_cr3(KA2PA(dba));
    }
    else {
        /*
         * Application processors need to create their own view of the
         * virtual address space. Because of that, each AP copies
         * already-initialized paging information from the bootstrap
         * processor and adjusts it to fulfill its needs.
         */
 
        dba = frame_alloc(FRAME_KA | FRAME_PANIC);
        memcpy((void *)dba, (void *)bootstrap_dba , PAGE_SIZE);
        write_cr3(KA2PA(dba));
    }
}
 

Subversion Repositories HelenOS-historic

(root)/SPARTAN/trunk/arch/amd64/src/mm/page.c – Rev 368 → 492

Rev 368		Rev 492
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/page.h>	29	#include <mm/page.h>
30	#include <mm/frame.h>	30	#include <mm/frame.h>
31	#include <arch/mm/page.h>	31	#include <arch/mm/page.h>
32	#include <arch/interrupt.h>	32	#include <arch/interrupt.h>
33	#include <arch/asm.h>	33	#include <arch/asm.h>
34	#include <config.h>	34	#include <config.h>
35		35
36	#include <memstr.h>	36	#include <memstr.h>
37		37
38		38
39	__address bootstrap_dba;	39	__address bootstrap_dba;
40		40
41	void page_arch_init(void)	41	void page_arch_init(void)
42	{	42	{
43	__address dba;	43	__address dba;
44	count_t i;	44	count_t i;
45		45
46	if (config.cpu_active == 1) {	46	if (config.cpu_active == 1) {
47	dba = frame_alloc(FRAME_KA \| FRAME_PANIC);	47	dba = frame_alloc(FRAME_KA \| FRAME_PANIC);
48	memsetb(dba, PAGE_SIZE, 0);	48	memsetb(dba, PAGE_SIZE, 0);
49		49
50	bootstrap_dba = dba;	50	bootstrap_dba = dba;
51		51
52	/*	52	/*
53	* PA2KA(identity) mapping for all frames.	53	* PA2KA(identity) mapping for all frames.
54	*/	54	*/
55	for (i = 0; i < config.memory_size/FRAME_SIZE; i++) {	55	for (i = 0; i < config.memory_size/FRAME_SIZE; i++) {
56	map_page_to_frame(PA2KA(i * PAGE_SIZE), i * PAGE_SIZE, PAGE_CACHEABLE \| PAGE_EXEC, KA2PA(dba));	56	page_mapping_insert(PA2KA(i * PAGE_SIZE), i * PAGE_SIZE, PAGE_CACHEABLE \| PAGE_EXEC, KA2PA(dba));
57	}	57	}
58		58
59	trap_register(14, page_fault);	59	trap_register(14, page_fault);
60	write_cr3(KA2PA(dba));	60	write_cr3(KA2PA(dba));
61	}	61	}
62	else {	62	else {
63	/*	63	/*
64	* Application processors need to create their own view of the	64	* Application processors need to create their own view of the
65	* virtual address space. Because of that, each AP copies	65	* virtual address space. Because of that, each AP copies
66	* already-initialized paging information from the bootstrap	66	* already-initialized paging information from the bootstrap
67	* processor and adjusts it to fulfill its needs.	67	* processor and adjusts it to fulfill its needs.
68	*/	68	*/
69		69
70	dba = frame_alloc(FRAME_KA \| FRAME_PANIC);	70	dba = frame_alloc(FRAME_KA \| FRAME_PANIC);
71	memcpy((void )dba, (void )bootstrap_dba , PAGE_SIZE);	71	memcpy((void )dba, (void )bootstrap_dba , PAGE_SIZE);
72	write_cr3(KA2PA(dba));	72	write_cr3(KA2PA(dba));
73	}	73	}
74	}	74	}
75		75