WebSVN – HelenOS – Diff – /branches/dynload/kernel/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.
 */
 
/** @addtogroup ia32mm
 * @{
 */
/** @file
 */
 
#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)
{
    uintptr_t 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 | PAGE_WRITE;
            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((uintptr_t) AS_KERNEL->genarch.page_table);
    } else
        write_cr3((uintptr_t) AS_KERNEL->genarch.page_table);
   
    paging_on();
}
 
 
uintptr_t hw_map(uintptr_t 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)
   
    uintptr_t virtaddr = PA2KA(last_frame);
    pfn_t i;
    for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++) {
        uintptr_t addr = PFN2ADDR(i);
        page_mapping_insert(AS_KERNEL, virtaddr + addr, physaddr + addr, PAGE_NOT_CACHEABLE | PAGE_WRITE);
    }
   
    last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);
   
    return virtaddr;
}
 
 
 
 
 
 
 
void page_fault(int n __attribute__((unused)), istate_t *istate)
{
    uintptr_t page;
    pf_access_t access;
   
    page = read_cr2();
       
    if (istate->error_word & PFERR_CODE_RSVD)
        panic("Reserved bit set in page directory.");
   
    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);
       
        decode_istate(istate);
        printf("page fault address: %#lx\n", page);
        panic("Page fault.");
    }
}
 
/** @}
 */
 

Rev 4343	Rev 4344
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	/** @addtogroup ia32mm	29	/** @addtogroup ia32mm
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#include <arch/mm/page.h>	35	#include <arch/mm/page.h>
36	#include <genarch/mm/page_pt.h>	36	#include <genarch/mm/page_pt.h>
37	#include <arch/mm/frame.h>	37	#include <arch/mm/frame.h>
38	#include <mm/frame.h>	38	#include <mm/frame.h>
39	#include <mm/page.h>	39	#include <mm/page.h>
40	#include <mm/as.h>	40	#include <mm/as.h>
41	#include <arch/types.h>	41	#include <arch/types.h>
42	#include <align.h>	42	#include <align.h>
43	#include <config.h>	43	#include <config.h>
44	#include <func.h>	44	#include <func.h>
45	#include <arch/interrupt.h>	45	#include <arch/interrupt.h>
46	#include <arch/asm.h>	46	#include <arch/asm.h>
47	#include <debug.h>	47	#include <debug.h>
48	#include <memstr.h>	48	#include <memstr.h>
49	#include <print.h>	49	#include <print.h>
50	#include <interrupt.h>	50	#include <interrupt.h>
51		51
52	void page_arch_init(void)	52	void page_arch_init(void)
53	{	53	{
54	uintptr_t cur;	54	uintptr_t cur;
55	int flags;	55	int flags;
56		56
57	if (config.cpu_active == 1) {	57	if (config.cpu_active == 1) {
58	page_mapping_operations = &pt_mapping_operations;	58	page_mapping_operations = &pt_mapping_operations;
59		59
60	/*	60	/*
61	* PA2KA(identity) mapping for all frames until last_frame.	61	* PA2KA(identity) mapping for all frames until last_frame.
62	*/	62	*/
63	for (cur = 0; cur < last_frame; cur += FRAME_SIZE) {	63	for (cur = 0; cur < last_frame; cur += FRAME_SIZE) {
64	flags = PAGE_CACHEABLE \| PAGE_WRITE;	64	flags = PAGE_CACHEABLE \| PAGE_WRITE;
65	if ((PA2KA(cur) >= config.base) && (PA2KA(cur) < config.base + config.kernel_size))	65	if ((PA2KA(cur) >= config.base) && (PA2KA(cur) < config.base + config.kernel_size))
66	flags \|= PAGE_GLOBAL;	66	flags \|= PAGE_GLOBAL;
67	page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags);	67	page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags);
68	}	68	}
69		69
70	exc_register(14, "page_fault", (iroutine) page_fault);	70	exc_register(14, "page_fault", (iroutine) page_fault);
71	write_cr3((uintptr_t) AS_KERNEL->genarch.page_table);	71	write_cr3((uintptr_t) AS_KERNEL->genarch.page_table);
72	} else	72	} else
73	write_cr3((uintptr_t) AS_KERNEL->genarch.page_table);	73	write_cr3((uintptr_t) AS_KERNEL->genarch.page_table);
74		74
75	paging_on();	75	paging_on();
76	}	76	}
77		77
78		78
79	uintptr_t hw_map(uintptr_t physaddr, size_t size)	79	uintptr_t hw_map(uintptr_t physaddr, size_t size)
80	{	80	{
81	if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH))	81	if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH))
82	panic("Unable to map physical memory %p (%d bytes).", physaddr, size)	82	panic("Unable to map physical memory %p (%d bytes).", physaddr, size)
83		83
84	uintptr_t virtaddr = PA2KA(last_frame);	84	uintptr_t virtaddr = PA2KA(last_frame);
85	pfn_t i;	85	pfn_t i;
86	for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++) {	86	for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++) {
87	uintptr_t addr = PFN2ADDR(i);	87	uintptr_t addr = PFN2ADDR(i);
88	page_mapping_insert(AS_KERNEL, virtaddr + addr, physaddr + addr, PAGE_NOT_CACHEABLE \| PAGE_WRITE);	88	page_mapping_insert(AS_KERNEL, virtaddr + addr, physaddr + addr, PAGE_NOT_CACHEABLE \| PAGE_WRITE);
89	}	89	}
90		90
91	last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);	91	last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);
92		92
93	return virtaddr;	93	return virtaddr;
94	}	94	}
95		-
96	void hw_area(uintptr_t physaddr, pfn_t frames)	-
97	{	-
98	*physaddr = end_frame;	-
99	*frames = ADDR2PFN(0xffffffff - end_frame);	-
100	}	-
101		95
102	void page_fault(int n __attribute__((unused)), istate_t *istate)	96	void page_fault(int n __attribute__((unused)), istate_t *istate)
103	{	97	{
104	uintptr_t page;	98	uintptr_t page;
105	pf_access_t access;	99	pf_access_t access;
106		100
107	page = read_cr2();	101	page = read_cr2();
108		102
109	if (istate->error_word & PFERR_CODE_RSVD)	103	if (istate->error_word & PFERR_CODE_RSVD)
110	panic("Reserved bit set in page directory.");	104	panic("Reserved bit set in page directory.");
111		105
112	if (istate->error_word & PFERR_CODE_RW)	106	if (istate->error_word & PFERR_CODE_RW)
113	access = PF_ACCESS_WRITE;	107	access = PF_ACCESS_WRITE;
114	else	108	else
115	access = PF_ACCESS_READ;	109	access = PF_ACCESS_READ;
116		110
117	if (as_page_fault(page, access, istate) == AS_PF_FAULT) {	111	if (as_page_fault(page, access, istate) == AS_PF_FAULT) {
118	fault_if_from_uspace(istate, "Page fault: %#x.", page);	112	fault_if_from_uspace(istate, "Page fault: %#x.", page);
119		113
120	decode_istate(istate);	114	decode_istate(istate);
121	printf("page fault address: %#lx\n", page);	115	printf("page fault address: %#lx\n", page);
122	panic("Page fault.");	116	panic("Page fault.");
123	}	117	}
124	}	118	}
125		119
126	/** @}	120	/** @}
127	*/	121	*/
128		122

Subversion Repositories HelenOS

(root)/branches/dynload/kernel/arch/ia32/src/mm/page.c @ 4340 – Rev 4343 → 4344