WebSVN – HelenOS – Diff – /trunk/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 <genarch/drivers/ega/ega.h>
#include <genarch/drivers/legacy/ia32/io.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>
#include <ddi/ddi.h>
 
/** Physical memory area for devices. */
static parea_t dev_area;
static parea_t ega_area;
 
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 hw_area(void)
{
    dev_area.pbase = end_frame;
    dev_area.frames = SIZE2FRAMES(0xffffffff - end_frame);
    ddi_parea_register(&dev_area);
   
    ega_area.pbase = EGA_VIDEORAM;
    ega_area.frames = SIZE2FRAMES(EGA_VRAM_SIZE);
    ddi_parea_register(&ega_area);
}
 
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 3908	Rev 3940
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 <genarch/drivers/ega/ega.h>
-		38	#include <genarch/drivers/legacy/ia32/io.h>
37	#include <arch/mm/frame.h>	39	#include <arch/mm/frame.h>
38	#include <mm/frame.h>	40	#include <mm/frame.h>
39	#include <mm/page.h>	41	#include <mm/page.h>
40	#include <mm/as.h>	42	#include <mm/as.h>
41	#include <arch/types.h>	43	#include <arch/types.h>
42	#include <align.h>	44	#include <align.h>
43	#include <config.h>	45	#include <config.h>
44	#include <func.h>	46	#include <func.h>
45	#include <arch/interrupt.h>	47	#include <arch/interrupt.h>
46	#include <arch/asm.h>	48	#include <arch/asm.h>
47	#include <debug.h>	49	#include <debug.h>
48	#include <memstr.h>	50	#include <memstr.h>
49	#include <print.h>	51	#include <print.h>
50	#include <interrupt.h>	52	#include <interrupt.h>
-		53	#include <ddi/ddi.h>
-		54
-		55	/** Physical memory area for devices. */
-		56	static parea_t dev_area;
-		57	static parea_t ega_area;
51		58
52	void page_arch_init(void)	59	void page_arch_init(void)
53	{	60	{
54	uintptr_t cur;	61	uintptr_t cur;
55	int flags;	62	int flags;
56		63
57	if (config.cpu_active == 1) {	64	if (config.cpu_active == 1) {
58	page_mapping_operations = &pt_mapping_operations;	65	page_mapping_operations = &pt_mapping_operations;
59		66
60	/*	67	/*
61	* PA2KA(identity) mapping for all frames until last_frame.	68	* PA2KA(identity) mapping for all frames until last_frame.
62	*/	69	*/
63	for (cur = 0; cur < last_frame; cur += FRAME_SIZE) {	70	for (cur = 0; cur < last_frame; cur += FRAME_SIZE) {
64	flags = PAGE_CACHEABLE \| PAGE_WRITE;	71	flags = PAGE_CACHEABLE \| PAGE_WRITE;
65	if ((PA2KA(cur) >= config.base) && (PA2KA(cur) < config.base + config.kernel_size))	72	if ((PA2KA(cur) >= config.base) && (PA2KA(cur) < config.base + config.kernel_size))
66	flags \|= PAGE_GLOBAL;	73	flags \|= PAGE_GLOBAL;
67	page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags);	74	page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags);
68	}	75	}
69		76
70	exc_register(14, "page_fault", (iroutine) page_fault);	77	exc_register(14, "page_fault", (iroutine) page_fault);
71	write_cr3((uintptr_t) AS_KERNEL->genarch.page_table);	78	write_cr3((uintptr_t) AS_KERNEL->genarch.page_table);
72	} else	79	} else
73	write_cr3((uintptr_t) AS_KERNEL->genarch.page_table);	80	write_cr3((uintptr_t) AS_KERNEL->genarch.page_table);
74		81
75	paging_on();	82	paging_on();
76	}	83	}
77		84
78		85
79	uintptr_t hw_map(uintptr_t physaddr, size_t size)	86	uintptr_t hw_map(uintptr_t physaddr, size_t size)
80	{	87	{
81	if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH))	88	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)	89	panic("Unable to map physical memory %p (%d bytes).", physaddr, size)
83		90
84	uintptr_t virtaddr = PA2KA(last_frame);	91	uintptr_t virtaddr = PA2KA(last_frame);
85	pfn_t i;	92	pfn_t i;
86	for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++) {	93	for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++) {
87	uintptr_t addr = PFN2ADDR(i);	94	uintptr_t addr = PFN2ADDR(i);
88	page_mapping_insert(AS_KERNEL, virtaddr + addr, physaddr + addr, PAGE_NOT_CACHEABLE \| PAGE_WRITE);	95	page_mapping_insert(AS_KERNEL, virtaddr + addr, physaddr + addr, PAGE_NOT_CACHEABLE \| PAGE_WRITE);
89	}	96	}
90		97
91	last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);	98	last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);
92		99
93	return virtaddr;	100	return virtaddr;
94	}	101	}
95		102
96	void hw_area(uintptr_t physaddr, pfn_t frames)	103	void hw_area(void)
97	{	104	{
98	*physaddr = end_frame;	105	dev_area.pbase = end_frame;
99	*frames = ADDR2PFN(0xffffffff - end_frame);	106	dev_area.frames = SIZE2FRAMES(0xffffffff - end_frame);
-		107	ddi_parea_register(&dev_area);
-		108
-		109	ega_area.pbase = EGA_VIDEORAM;
-		110	ega_area.frames = SIZE2FRAMES(EGA_VRAM_SIZE);
-		111	ddi_parea_register(&ega_area);
100	}	112	}
101		113
102	void page_fault(int n __attribute__((unused)), istate_t *istate)	114	void page_fault(int n __attribute__((unused)), istate_t *istate)
103	{	115	{
104	uintptr_t page;	116	uintptr_t page;
105	pf_access_t access;	117	pf_access_t access;
106		118
107	page = read_cr2();	119	page = read_cr2();
108		120
109	if (istate->error_word & PFERR_CODE_RSVD)	121	if (istate->error_word & PFERR_CODE_RSVD)
110	panic("Reserved bit set in page directory.");	122	panic("Reserved bit set in page directory.");
111		123
112	if (istate->error_word & PFERR_CODE_RW)	124	if (istate->error_word & PFERR_CODE_RW)
113	access = PF_ACCESS_WRITE;	125	access = PF_ACCESS_WRITE;
114	else	126	else
115	access = PF_ACCESS_READ;	127	access = PF_ACCESS_READ;
116		128
117	if (as_page_fault(page, access, istate) == AS_PF_FAULT) {	129	if (as_page_fault(page, access, istate) == AS_PF_FAULT) {
118	fault_if_from_uspace(istate, "Page fault: %#x.", page);	130	fault_if_from_uspace(istate, "Page fault: %#x.", page);
119		131
120	decode_istate(istate);	132	decode_istate(istate);
121	printf("page fault address: %#lx\n", page);	133	printf("page fault address: %#lx\n", page);
122	panic("Page fault.");	134	panic("Page fault.");
123	}	135	}
124	}	136	}
125		137
126	/** @}	138	/** @}
127	*/	139	*/
128		140

Subversion Repositories HelenOS

(root)/trunk/kernel/arch/ia32/src/mm/page.c @ 3802 – Rev 3908 → 3940