WebSVN – HelenOS-historic – Diff – /kernel/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.
 */
 
 /** @addtogroup amd64mm
 * @{
 */
/** @file
 */
 
#include <arch/mm/page.h>
#include <genarch/mm/page_pt.h>
#include <arch/mm/frame.h>
#include <mm/page.h>
#include <mm/frame.h>
#include <mm/as.h>
#include <arch/interrupt.h>
#include <arch/asm.h>
#include <config.h>
#include <memstr.h>
#include <interrupt.h>
#include <print.h>
#include <panic.h>
#include <align.h>
 
/* Definitions for identity page mapper */
pte_t helper_ptl1[512] __attribute__((aligned (PAGE_SIZE)));
pte_t helper_ptl2[512] __attribute__((aligned (PAGE_SIZE)));
pte_t helper_ptl3[512] __attribute__((aligned (PAGE_SIZE)));
extern pte_t ptl_0; /* From boot.S */
 
#define PTL1_PRESENT(ptl0, page) (!(GET_PTL1_FLAGS_ARCH(ptl0, PTL0_INDEX_ARCH(page)) & PAGE_NOT_PRESENT))
#define PTL2_PRESENT(ptl1, page) (!(GET_PTL2_FLAGS_ARCH(ptl1, PTL1_INDEX_ARCH(page)) & PAGE_NOT_PRESENT))
#define PTL3_PRESENT(ptl2, page) (!(GET_PTL3_FLAGS_ARCH(ptl2, PTL2_INDEX_ARCH(page)) & PAGE_NOT_PRESENT))
 
#define PTL1_ADDR(ptl0, page) ((pte_t *)PA2KA(GET_PTL1_ADDRESS_ARCH(ptl0, PTL0_INDEX_ARCH(page))))
#define PTL2_ADDR(ptl1, page) ((pte_t *)PA2KA(GET_PTL2_ADDRESS_ARCH(ptl1, PTL1_INDEX_ARCH(page))))
#define PTL3_ADDR(ptl2, page) ((pte_t *)PA2KA(GET_PTL3_ADDRESS_ARCH(ptl2, PTL2_INDEX_ARCH(page))))
 
#define SETUP_PTL1(ptl0, page, tgt)  {  \
    SET_PTL1_ADDRESS_ARCH(ptl0, PTL0_INDEX_ARCH(page), (uintptr_t)KA2PA(tgt)); \
        SET_PTL1_FLAGS_ARCH(ptl0, PTL0_INDEX_ARCH(page), PAGE_WRITE | PAGE_EXEC); \
    }
#define SETUP_PTL2(ptl1, page, tgt)  {  \
    SET_PTL2_ADDRESS_ARCH(ptl1, PTL1_INDEX_ARCH(page), (uintptr_t)KA2PA(tgt)); \
        SET_PTL2_FLAGS_ARCH(ptl1, PTL1_INDEX_ARCH(page), PAGE_WRITE | PAGE_EXEC); \
    }
#define SETUP_PTL3(ptl2, page, tgt)  {  \
    SET_PTL3_ADDRESS_ARCH(ptl2, PTL2_INDEX_ARCH(page), (uintptr_t)KA2PA(tgt)); \
        SET_PTL3_FLAGS_ARCH(ptl2, PTL2_INDEX_ARCH(page), PAGE_WRITE | PAGE_EXEC); \
    }
#define SETUP_FRAME(ptl3, page, tgt)  { \
    SET_FRAME_ADDRESS_ARCH(ptl3, PTL3_INDEX_ARCH(page), (uintptr_t)KA2PA(tgt)); \
        SET_FRAME_FLAGS_ARCH(ptl3, PTL3_INDEX_ARCH(page), PAGE_WRITE | PAGE_EXEC); \
    }
 
 
void page_arch_init(void)
{
    uintptr_t cur;
    int i;
    int identity_flags = PAGE_CACHEABLE | PAGE_EXEC | PAGE_GLOBAL;
 
    if (config.cpu_active == 1) {
        page_mapping_operations = &pt_mapping_operations;
       
        /*
         * PA2KA(identity) mapping for all frames.
         */
        for (cur = 0; cur < last_frame; cur += FRAME_SIZE) {
            /* Standard identity mapping */
            page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, identity_flags);
        }
        /* Upper kernel mapping
         * - from zero to top of kernel (include bottom addresses
         *   because some are needed for init )
         */
        for (cur = PA2KA_CODE(0); cur < config.base+config.kernel_size; cur += FRAME_SIZE) {
            page_mapping_insert(AS_KERNEL, cur, KA2PA(cur), identity_flags);
        }
        for (i=0; i < init.cnt; i++) {
            for (cur=init.tasks[i].addr;cur < init.tasks[i].size; cur += FRAME_SIZE) {
                page_mapping_insert(AS_KERNEL, PA2KA_CODE(KA2PA(cur)), KA2PA(cur), identity_flags);
            }
        }
 
        exc_register(14, "page_fault", (iroutine)page_fault);
        write_cr3((uintptr_t) AS_KERNEL->page_table);
    }
    else {
        write_cr3((uintptr_t) AS_KERNEL->page_table);
    }
}
 
 
/** Identity page mapper
 *
 * We need to map whole physical memory identically before the page subsystem
 * is initializaed. This thing clears page table and fills in the specific
 * items.
 */
void ident_page_fault(int n, istate_t *istate)
{
    uintptr_t page;
    static uintptr_t oldpage = 0;
    pte_t *aptl_1, *aptl_2, *aptl_3;
 
    page = read_cr2();
    if (oldpage) {
        /* Unmap old address */
        aptl_1 = PTL1_ADDR(&ptl_0, oldpage);
        aptl_2 = PTL2_ADDR(aptl_1, oldpage);
        aptl_3 = PTL3_ADDR(aptl_2, oldpage);
 
        SET_FRAME_FLAGS_ARCH(aptl_3, PTL3_INDEX_ARCH(oldpage), PAGE_NOT_PRESENT);
        if (KA2PA(aptl_3) == KA2PA(helper_ptl3))
            SET_PTL3_FLAGS_ARCH(aptl_2, PTL2_INDEX_ARCH(oldpage), PAGE_NOT_PRESENT);
        if (KA2PA(aptl_2) == KA2PA(helper_ptl2))
            SET_PTL2_FLAGS_ARCH(aptl_1, PTL1_INDEX_ARCH(oldpage), PAGE_NOT_PRESENT);
        if (KA2PA(aptl_1) == KA2PA(helper_ptl1))
            SET_PTL1_FLAGS_ARCH(&ptl_0, PTL0_INDEX_ARCH(oldpage), PAGE_NOT_PRESENT);
    }
    if (PTL1_PRESENT(&ptl_0, page))
        aptl_1 = PTL1_ADDR(&ptl_0, page);
    else {
        SETUP_PTL1(&ptl_0, page, helper_ptl1);
        aptl_1 = helper_ptl1;
    }
       
    if (PTL2_PRESENT(aptl_1, page))
        aptl_2 = PTL2_ADDR(aptl_1, page);
    else {
        SETUP_PTL2(aptl_1, page, helper_ptl2);
        aptl_2 = helper_ptl2;
    }
 
    if (PTL3_PRESENT(aptl_2, page))
        aptl_3 = PTL3_ADDR(aptl_2, page);
    else {
        SETUP_PTL3(aptl_2, page, helper_ptl3);
        aptl_3 = helper_ptl3;
    }
   
    SETUP_FRAME(aptl_3, page, page);
 
    oldpage = page;
}
 
 
void page_fault(int n, 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 table entry.\n");
   
    if (istate->error_word & PFERR_CODE_RW)
        access = PF_ACCESS_WRITE;
    else if (istate->error_word & PFERR_CODE_ID)
        access = PF_ACCESS_EXEC;
    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(n, istate);
        printf("Page fault address: %llx\n", page);
        panic("page fault\n");
    }
}
 
 
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++)
        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;
}
 
 /** @}
 */
 
 

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/amd64/src/mm/page.c – Rev 1735 → 1780

Rev 1735		Rev 1780
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 amd64mm	29	/** @addtogroup amd64mm
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/page.h>	38	#include <mm/page.h>
39	#include <mm/frame.h>	39	#include <mm/frame.h>
40	#include <mm/as.h>	40	#include <mm/as.h>
41	#include <arch/interrupt.h>	41	#include <arch/interrupt.h>
42	#include <arch/asm.h>	42	#include <arch/asm.h>
43	#include <config.h>	43	#include <config.h>
44	#include <memstr.h>	44	#include <memstr.h>
45	#include <interrupt.h>	45	#include <interrupt.h>
46	#include <print.h>	46	#include <print.h>
47	#include <panic.h>	47	#include <panic.h>
48	#include <align.h>	48	#include <align.h>
49		49
50	/* Definitions for identity page mapper */	50	/* Definitions for identity page mapper */
51	pte_t helper_ptl1[512] __attribute__((aligned (PAGE_SIZE)));	51	pte_t helper_ptl1[512] __attribute__((aligned (PAGE_SIZE)));
52	pte_t helper_ptl2[512] __attribute__((aligned (PAGE_SIZE)));	52	pte_t helper_ptl2[512] __attribute__((aligned (PAGE_SIZE)));
53	pte_t helper_ptl3[512] __attribute__((aligned (PAGE_SIZE)));	53	pte_t helper_ptl3[512] __attribute__((aligned (PAGE_SIZE)));
54	extern pte_t ptl_0; /* From boot.S */	54	extern pte_t ptl_0; /* From boot.S */
55		55
56	#define PTL1_PRESENT(ptl0, page) (!(GET_PTL1_FLAGS_ARCH(ptl0, PTL0_INDEX_ARCH(page)) & PAGE_NOT_PRESENT))	56	#define PTL1_PRESENT(ptl0, page) (!(GET_PTL1_FLAGS_ARCH(ptl0, PTL0_INDEX_ARCH(page)) & PAGE_NOT_PRESENT))
57	#define PTL2_PRESENT(ptl1, page) (!(GET_PTL2_FLAGS_ARCH(ptl1, PTL1_INDEX_ARCH(page)) & PAGE_NOT_PRESENT))	57	#define PTL2_PRESENT(ptl1, page) (!(GET_PTL2_FLAGS_ARCH(ptl1, PTL1_INDEX_ARCH(page)) & PAGE_NOT_PRESENT))
58	#define PTL3_PRESENT(ptl2, page) (!(GET_PTL3_FLAGS_ARCH(ptl2, PTL2_INDEX_ARCH(page)) & PAGE_NOT_PRESENT))	58	#define PTL3_PRESENT(ptl2, page) (!(GET_PTL3_FLAGS_ARCH(ptl2, PTL2_INDEX_ARCH(page)) & PAGE_NOT_PRESENT))
59		59
60	#define PTL1_ADDR(ptl0, page) ((pte_t *)PA2KA(GET_PTL1_ADDRESS_ARCH(ptl0, PTL0_INDEX_ARCH(page))))	60	#define PTL1_ADDR(ptl0, page) ((pte_t *)PA2KA(GET_PTL1_ADDRESS_ARCH(ptl0, PTL0_INDEX_ARCH(page))))
61	#define PTL2_ADDR(ptl1, page) ((pte_t *)PA2KA(GET_PTL2_ADDRESS_ARCH(ptl1, PTL1_INDEX_ARCH(page))))	61	#define PTL2_ADDR(ptl1, page) ((pte_t *)PA2KA(GET_PTL2_ADDRESS_ARCH(ptl1, PTL1_INDEX_ARCH(page))))
62	#define PTL3_ADDR(ptl2, page) ((pte_t *)PA2KA(GET_PTL3_ADDRESS_ARCH(ptl2, PTL2_INDEX_ARCH(page))))	62	#define PTL3_ADDR(ptl2, page) ((pte_t *)PA2KA(GET_PTL3_ADDRESS_ARCH(ptl2, PTL2_INDEX_ARCH(page))))
63		63
64	#define SETUP_PTL1(ptl0, page, tgt) { \	64	#define SETUP_PTL1(ptl0, page, tgt) { \
65	SET_PTL1_ADDRESS_ARCH(ptl0, PTL0_INDEX_ARCH(page), (__address)KA2PA(tgt)); \	65	SET_PTL1_ADDRESS_ARCH(ptl0, PTL0_INDEX_ARCH(page), (uintptr_t)KA2PA(tgt)); \
66	SET_PTL1_FLAGS_ARCH(ptl0, PTL0_INDEX_ARCH(page), PAGE_WRITE \| PAGE_EXEC); \	66	SET_PTL1_FLAGS_ARCH(ptl0, PTL0_INDEX_ARCH(page), PAGE_WRITE \| PAGE_EXEC); \
67	}	67	}
68	#define SETUP_PTL2(ptl1, page, tgt) { \	68	#define SETUP_PTL2(ptl1, page, tgt) { \
69	SET_PTL2_ADDRESS_ARCH(ptl1, PTL1_INDEX_ARCH(page), (__address)KA2PA(tgt)); \	69	SET_PTL2_ADDRESS_ARCH(ptl1, PTL1_INDEX_ARCH(page), (uintptr_t)KA2PA(tgt)); \
70	SET_PTL2_FLAGS_ARCH(ptl1, PTL1_INDEX_ARCH(page), PAGE_WRITE \| PAGE_EXEC); \	70	SET_PTL2_FLAGS_ARCH(ptl1, PTL1_INDEX_ARCH(page), PAGE_WRITE \| PAGE_EXEC); \
71	}	71	}
72	#define SETUP_PTL3(ptl2, page, tgt) { \	72	#define SETUP_PTL3(ptl2, page, tgt) { \
73	SET_PTL3_ADDRESS_ARCH(ptl2, PTL2_INDEX_ARCH(page), (__address)KA2PA(tgt)); \	73	SET_PTL3_ADDRESS_ARCH(ptl2, PTL2_INDEX_ARCH(page), (uintptr_t)KA2PA(tgt)); \
74	SET_PTL3_FLAGS_ARCH(ptl2, PTL2_INDEX_ARCH(page), PAGE_WRITE \| PAGE_EXEC); \	74	SET_PTL3_FLAGS_ARCH(ptl2, PTL2_INDEX_ARCH(page), PAGE_WRITE \| PAGE_EXEC); \
75	}	75	}
76	#define SETUP_FRAME(ptl3, page, tgt) { \	76	#define SETUP_FRAME(ptl3, page, tgt) { \
77	SET_FRAME_ADDRESS_ARCH(ptl3, PTL3_INDEX_ARCH(page), (__address)KA2PA(tgt)); \	77	SET_FRAME_ADDRESS_ARCH(ptl3, PTL3_INDEX_ARCH(page), (uintptr_t)KA2PA(tgt)); \
78	SET_FRAME_FLAGS_ARCH(ptl3, PTL3_INDEX_ARCH(page), PAGE_WRITE \| PAGE_EXEC); \	78	SET_FRAME_FLAGS_ARCH(ptl3, PTL3_INDEX_ARCH(page), PAGE_WRITE \| PAGE_EXEC); \
79	}	79	}
80		80
81		81
82	void page_arch_init(void)	82	void page_arch_init(void)
83	{	83	{
84	__address cur;	84	uintptr_t cur;
85	int i;	85	int i;
86	int identity_flags = PAGE_CACHEABLE \| PAGE_EXEC \| PAGE_GLOBAL;	86	int identity_flags = PAGE_CACHEABLE \| PAGE_EXEC \| PAGE_GLOBAL;
87		87
88	if (config.cpu_active == 1) {	88	if (config.cpu_active == 1) {
89	page_mapping_operations = &pt_mapping_operations;	89	page_mapping_operations = &pt_mapping_operations;
90		90
91	/*	91	/*
92	* PA2KA(identity) mapping for all frames.	92	* PA2KA(identity) mapping for all frames.
93	*/	93	*/
94	for (cur = 0; cur < last_frame; cur += FRAME_SIZE) {	94	for (cur = 0; cur < last_frame; cur += FRAME_SIZE) {
95	/* Standard identity mapping */	95	/* Standard identity mapping */
96	page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, identity_flags);	96	page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, identity_flags);
97	}	97	}
98	/* Upper kernel mapping	98	/* Upper kernel mapping
99	* - from zero to top of kernel (include bottom addresses	99	* - from zero to top of kernel (include bottom addresses
100	* because some are needed for init )	100	* because some are needed for init )
101	*/	101	*/
102	for (cur = PA2KA_CODE(0); cur < config.base+config.kernel_size; cur += FRAME_SIZE) {	102	for (cur = PA2KA_CODE(0); cur < config.base+config.kernel_size; cur += FRAME_SIZE) {
103	page_mapping_insert(AS_KERNEL, cur, KA2PA(cur), identity_flags);	103	page_mapping_insert(AS_KERNEL, cur, KA2PA(cur), identity_flags);
104	}	104	}
105	for (i=0; i < init.cnt; i++) {	105	for (i=0; i < init.cnt; i++) {
106	for (cur=init.tasks[i].addr;cur < init.tasks[i].size; cur += FRAME_SIZE) {	106	for (cur=init.tasks[i].addr;cur < init.tasks[i].size; cur += FRAME_SIZE) {
107	page_mapping_insert(AS_KERNEL, PA2KA_CODE(KA2PA(cur)), KA2PA(cur), identity_flags);	107	page_mapping_insert(AS_KERNEL, PA2KA_CODE(KA2PA(cur)), KA2PA(cur), identity_flags);
108	}	108	}
109	}	109	}
110		110
111	exc_register(14, "page_fault", (iroutine)page_fault);	111	exc_register(14, "page_fault", (iroutine)page_fault);
112	write_cr3((__address) AS_KERNEL->page_table);	112	write_cr3((uintptr_t) AS_KERNEL->page_table);
113	}	113	}
114	else {	114	else {
115	write_cr3((__address) AS_KERNEL->page_table);	115	write_cr3((uintptr_t) AS_KERNEL->page_table);
116	}	116	}
117	}	117	}
118		118
119		119
120	/** Identity page mapper	120	/** Identity page mapper
121	*	121	*
122	* We need to map whole physical memory identically before the page subsystem	122	* We need to map whole physical memory identically before the page subsystem
123	* is initializaed. This thing clears page table and fills in the specific	123	* is initializaed. This thing clears page table and fills in the specific
124	* items.	124	* items.
125	*/	125	*/
126	void ident_page_fault(int n, istate_t *istate)	126	void ident_page_fault(int n, istate_t *istate)
127	{	127	{
128	__address page;	128	uintptr_t page;
129	static __address oldpage = 0;	129	static uintptr_t oldpage = 0;
130	pte_t aptl_1, aptl_2, *aptl_3;	130	pte_t aptl_1, aptl_2, *aptl_3;
131		131
132	page = read_cr2();	132	page = read_cr2();
133	if (oldpage) {	133	if (oldpage) {
134	/* Unmap old address */	134	/* Unmap old address */
135	aptl_1 = PTL1_ADDR(&ptl_0, oldpage);	135	aptl_1 = PTL1_ADDR(&ptl_0, oldpage);
136	aptl_2 = PTL2_ADDR(aptl_1, oldpage);	136	aptl_2 = PTL2_ADDR(aptl_1, oldpage);
137	aptl_3 = PTL3_ADDR(aptl_2, oldpage);	137	aptl_3 = PTL3_ADDR(aptl_2, oldpage);
138		138
139	SET_FRAME_FLAGS_ARCH(aptl_3, PTL3_INDEX_ARCH(oldpage), PAGE_NOT_PRESENT);	139	SET_FRAME_FLAGS_ARCH(aptl_3, PTL3_INDEX_ARCH(oldpage), PAGE_NOT_PRESENT);
140	if (KA2PA(aptl_3) == KA2PA(helper_ptl3))	140	if (KA2PA(aptl_3) == KA2PA(helper_ptl3))
141	SET_PTL3_FLAGS_ARCH(aptl_2, PTL2_INDEX_ARCH(oldpage), PAGE_NOT_PRESENT);	141	SET_PTL3_FLAGS_ARCH(aptl_2, PTL2_INDEX_ARCH(oldpage), PAGE_NOT_PRESENT);
142	if (KA2PA(aptl_2) == KA2PA(helper_ptl2))	142	if (KA2PA(aptl_2) == KA2PA(helper_ptl2))
143	SET_PTL2_FLAGS_ARCH(aptl_1, PTL1_INDEX_ARCH(oldpage), PAGE_NOT_PRESENT);	143	SET_PTL2_FLAGS_ARCH(aptl_1, PTL1_INDEX_ARCH(oldpage), PAGE_NOT_PRESENT);
144	if (KA2PA(aptl_1) == KA2PA(helper_ptl1))	144	if (KA2PA(aptl_1) == KA2PA(helper_ptl1))
145	SET_PTL1_FLAGS_ARCH(&ptl_0, PTL0_INDEX_ARCH(oldpage), PAGE_NOT_PRESENT);	145	SET_PTL1_FLAGS_ARCH(&ptl_0, PTL0_INDEX_ARCH(oldpage), PAGE_NOT_PRESENT);
146	}	146	}
147	if (PTL1_PRESENT(&ptl_0, page))	147	if (PTL1_PRESENT(&ptl_0, page))
148	aptl_1 = PTL1_ADDR(&ptl_0, page);	148	aptl_1 = PTL1_ADDR(&ptl_0, page);
149	else {	149	else {
150	SETUP_PTL1(&ptl_0, page, helper_ptl1);	150	SETUP_PTL1(&ptl_0, page, helper_ptl1);
151	aptl_1 = helper_ptl1;	151	aptl_1 = helper_ptl1;
152	}	152	}
153		153
154	if (PTL2_PRESENT(aptl_1, page))	154	if (PTL2_PRESENT(aptl_1, page))
155	aptl_2 = PTL2_ADDR(aptl_1, page);	155	aptl_2 = PTL2_ADDR(aptl_1, page);
156	else {	156	else {
157	SETUP_PTL2(aptl_1, page, helper_ptl2);	157	SETUP_PTL2(aptl_1, page, helper_ptl2);
158	aptl_2 = helper_ptl2;	158	aptl_2 = helper_ptl2;
159	}	159	}
160		160
161	if (PTL3_PRESENT(aptl_2, page))	161	if (PTL3_PRESENT(aptl_2, page))
162	aptl_3 = PTL3_ADDR(aptl_2, page);	162	aptl_3 = PTL3_ADDR(aptl_2, page);
163	else {	163	else {
164	SETUP_PTL3(aptl_2, page, helper_ptl3);	164	SETUP_PTL3(aptl_2, page, helper_ptl3);
165	aptl_3 = helper_ptl3;	165	aptl_3 = helper_ptl3;
166	}	166	}
167		167
168	SETUP_FRAME(aptl_3, page, page);	168	SETUP_FRAME(aptl_3, page, page);
169		169
170	oldpage = page;	170	oldpage = page;
171	}	171	}
172		172
173		173
174	void page_fault(int n, istate_t *istate)	174	void page_fault(int n, istate_t *istate)
175	{	175	{
176	__address page;	176	uintptr_t page;
177	pf_access_t access;	177	pf_access_t access;
178		178
179	page = read_cr2();	179	page = read_cr2();
180		180
181	if (istate->error_word & PFERR_CODE_RSVD)	181	if (istate->error_word & PFERR_CODE_RSVD)
182	panic("Reserved bit set in page table entry.\n");	182	panic("Reserved bit set in page table entry.\n");
183		183
184	if (istate->error_word & PFERR_CODE_RW)	184	if (istate->error_word & PFERR_CODE_RW)
185	access = PF_ACCESS_WRITE;	185	access = PF_ACCESS_WRITE;
186	else if (istate->error_word & PFERR_CODE_ID)	186	else if (istate->error_word & PFERR_CODE_ID)
187	access = PF_ACCESS_EXEC;	187	access = PF_ACCESS_EXEC;
188	else	188	else
189	access = PF_ACCESS_READ;	189	access = PF_ACCESS_READ;
190		190
191	if (as_page_fault(page, access, istate) == AS_PF_FAULT) {	191	if (as_page_fault(page, access, istate) == AS_PF_FAULT) {
192	fault_if_from_uspace(istate, "Page fault: %#x", page);	192	fault_if_from_uspace(istate, "Page fault: %#x", page);
193		193
194	print_info_errcode(n, istate);	194	print_info_errcode(n, istate);
195	printf("Page fault address: %llx\n", page);	195	printf("Page fault address: %llx\n", page);
196	panic("page fault\n");	196	panic("page fault\n");
197	}	197	}
198	}	198	}
199		199
200		200
201	__address hw_map(__address physaddr, size_t size)	201	uintptr_t hw_map(uintptr_t physaddr, size_t size)
202	{	202	{
203	if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH))	203	if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH))
204	panic("Unable to map physical memory %p (%d bytes)", physaddr, size)	204	panic("Unable to map physical memory %p (%d bytes)", physaddr, size)
205		205
206	__address virtaddr = PA2KA(last_frame);	206	uintptr_t virtaddr = PA2KA(last_frame);
207	pfn_t i;	207	pfn_t i;
208	for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++)	208	for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++)
209	page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), physaddr + PFN2ADDR(i), PAGE_NOT_CACHEABLE);	209	page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), physaddr + PFN2ADDR(i), PAGE_NOT_CACHEABLE);
210		210
211	last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);	211	last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);
212		212
213	return virtaddr;	213	return virtaddr;
214	}	214	}
215		215
216	/** @}	216	/** @}
217	*/	217	*/
218		218
219		219