WebSVN – HelenOS-historic – Diff – /kernel/trunk/arch/ia32/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 <arch/mm/page.h>
#include <genarch/mm/page_pt.h>
#include <arch/mm/frame.h>
#include <mm/frame.h>
#include <mm/page.h>
#include <mm/as.h>
#include <arch/types.h>
#include <align.h>
#include <config.h>
#include <func.h>
#include <arch/interrupt.h>
#include <arch/asm.h>
#include <debug.h>
#include <memstr.h>
#include <print.h>
#include <interrupt.h>
 
void page_arch_init(void)
{
    __address cur;
    int flags;
 
    if (config.cpu_active == 1) {
        page_mapping_operations = &pt_mapping_operations;
   
        /*
         * PA2KA(identity) mapping for all frames until last_frame.
         */
        for (cur = 0; cur < last_frame; cur += FRAME_SIZE) {
            flags = PAGE_CACHEABLE;
            if ((PA2KA(cur) >= config.base) && (PA2KA(cur) < config.base + config.kernel_size))
                flags |= PAGE_GLOBAL;
            page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags);
        }
 
        exc_register(14, "page_fault", (iroutine) page_fault);
        write_cr3((__address) AS_KERNEL->page_table);
    }
    else {
        write_cr3((__address) AS_KERNEL->page_table);
    }
 
    paging_on();
}
 
 
__address hw_map(__address physaddr, size_t size)
{
    if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH))
        panic("Unable to map physical memory %p (%d bytes)", physaddr, size)
   
    __address virtaddr = PA2KA(last_frame);
    pfn_t i;
    for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++)
        page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), physaddr + PFN2ADDR(i), PAGE_NOT_CACHEABLE);
   
    last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);
   
    return virtaddr;
}
 
void page_fault(int n, istate_t *istate)
{
        __address page;
    pf_access_t access;
   
        page = read_cr2();
       
        if (istate->error_word & PFERR_CODE_RSVD)
        panic("Reserved bit set in page directory.\n");
 
    if (istate->error_word & PFERR_CODE_RW)
        access = PF_ACCESS_WRITE;
    else
        access = PF_ACCESS_READ;
 
        if (as_page_fault(page, access, istate) == AS_PF_FAULT) {
        fault_if_from_uspace(istate, "Page fault: %#x", page);
 
                PRINT_INFO_ERRCODE(istate);
                printf("page fault address: %#x\n", page);
                panic("page fault\n");
        }
}
 

Rev 1411	Rev 1595
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 <arch/mm/page.h>	29	#include <arch/mm/page.h>
30	#include <genarch/mm/page_pt.h>	30	#include <genarch/mm/page_pt.h>
31	#include <arch/mm/frame.h>	31	#include <arch/mm/frame.h>
32	#include <mm/frame.h>	32	#include <mm/frame.h>
33	#include <mm/page.h>	33	#include <mm/page.h>
34	#include <mm/as.h>	34	#include <mm/as.h>
35	#include <arch/types.h>	35	#include <arch/types.h>
36	#include <align.h>	36	#include <align.h>
37	#include <config.h>	37	#include <config.h>
38	#include <func.h>	38	#include <func.h>
39	#include <arch/interrupt.h>	39	#include <arch/interrupt.h>
40	#include <arch/asm.h>	40	#include <arch/asm.h>
41	#include <debug.h>	41	#include <debug.h>
42	#include <memstr.h>	42	#include <memstr.h>
43	#include <print.h>	43	#include <print.h>
44	#include <interrupt.h>	44	#include <interrupt.h>
45		45
46	void page_arch_init(void)	46	void page_arch_init(void)
47	{	47	{
48	__address cur;	48	__address cur;
49	int flags;	49	int flags;
50		50
51	if (config.cpu_active == 1) {	51	if (config.cpu_active == 1) {
52	page_mapping_operations = &pt_mapping_operations;	52	page_mapping_operations = &pt_mapping_operations;
53		53
54	/*	54	/*
55	* PA2KA(identity) mapping for all frames until last_frame.	55	* PA2KA(identity) mapping for all frames until last_frame.
56	*/	56	*/
57	for (cur = 0; cur < last_frame; cur += FRAME_SIZE) {	57	for (cur = 0; cur < last_frame; cur += FRAME_SIZE) {
58	flags = PAGE_CACHEABLE;	58	flags = PAGE_CACHEABLE;
59	if ((PA2KA(cur) >= config.base) && (PA2KA(cur) < config.base + config.kernel_size))	59	if ((PA2KA(cur) >= config.base) && (PA2KA(cur) < config.base + config.kernel_size))
60	flags \|= PAGE_GLOBAL;	60	flags \|= PAGE_GLOBAL;
61	page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags);	61	page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags);
62	}	62	}
63		63
64	exc_register(14, "page_fault", (iroutine) page_fault);	64	exc_register(14, "page_fault", (iroutine) page_fault);
65	write_cr3((__address) AS_KERNEL->page_table);	65	write_cr3((__address) AS_KERNEL->page_table);
66	}	66	}
67	else {	67	else {
68	write_cr3((__address) AS_KERNEL->page_table);	68	write_cr3((__address) AS_KERNEL->page_table);
69	}	69	}
70		70
71	paging_on();	71	paging_on();
72	}	72	}
73		73
74		74
75	__address hw_map(__address physaddr, size_t size)	75	__address hw_map(__address physaddr, size_t size)
76	{	76	{
77	if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH))	77	if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH))
78	panic("Unable to map physical memory %p (%d bytes)", physaddr, size)	78	panic("Unable to map physical memory %p (%d bytes)", physaddr, size)
79		79
80	__address virtaddr = PA2KA(last_frame);	80	__address virtaddr = PA2KA(last_frame);
81	pfn_t i;	81	pfn_t i;
82	for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++)	82	for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++)
83	page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), physaddr + PFN2ADDR(i), PAGE_NOT_CACHEABLE);	83	page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), physaddr + PFN2ADDR(i), PAGE_NOT_CACHEABLE);
84		84
85	last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);	85	last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);
86		86
87	return virtaddr;	87	return virtaddr;
88	}	88	}
89		89
90	void page_fault(int n, istate_t *istate)	90	void page_fault(int n, istate_t *istate)
91	{	91	{
92	__address page;	92	__address page;
93	pf_access_t access;	93	pf_access_t access;
94		94
95	page = read_cr2();	95	page = read_cr2();
96		96
97	if (istate->error_word & PFERR_CODE_RSVD)	97	if (istate->error_word & PFERR_CODE_RSVD)
98	panic("Reserved bit set in page directory.\n");	98	panic("Reserved bit set in page directory.\n");
99		99
100	if (istate->error_word & PFERR_CODE_RW)	100	if (istate->error_word & PFERR_CODE_RW)
101	access = PF_ACCESS_WRITE;	101	access = PF_ACCESS_WRITE;
102	else	102	else
103	access = PF_ACCESS_READ;	103	access = PF_ACCESS_READ;
104		104
105	if (as_page_fault(page, access, istate) == AS_PF_FAULT) {	105	if (as_page_fault(page, access, istate) == AS_PF_FAULT) {
-		106	fault_if_from_uspace(istate, "Page fault: %#x", page);
-		107
106	PRINT_INFO_ERRCODE(istate);	108	PRINT_INFO_ERRCODE(istate);
107	printf("page fault address: %#x\n", page);	109	printf("page fault address: %#x\n", page);
108	panic("page fault\n");	110	panic("page fault\n");
109	}	111	}
110	}	112	}
111		113

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/ia32/src/mm/page.c – Rev 1411 → 1595