WebSVN – HelenOS – Diff – /branches/arm/kernel/arch/arm32/src/mm/page.c


/*
 * Copyright (c) 2007 Pavel Jancik, Michal Kebrt
 * 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 arm32mm
 * @{
 */
/** @file
 */
 
#include <arch/mm/page.h>
#include <genarch/mm/page_pt.h>
#include <mm/page.h>
#include <align.h>
#include <config.h>
#include <arch/exception.h>
#include <typedefs.h>
#include <arch/types.h>
#include <interrupt.h>
#include <arch/debug_print/print.h>
 
 
/**
 * Initializes kernel adress space page tables, sets abourts exceptions vectors
 */
void page_arch_init(void)
{
    uintptr_t cur;
    int flags;
 
    page_mapping_operations = &pt_mapping_operations;
 
    flags = PAGE_CACHEABLE;
 
    /* PA2KA(identity) mapping for all frames until last_frame */
    for (cur = 0; cur < last_frame; cur += FRAME_SIZE) {
        page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags);
    }
   
    // Create mapping for exception table at high offcet
    #ifdef HIGH_EXCEPTION_VECTORS
    /* Note: this mapping cann't be done by hw_map because fixed exception
       vector is stored at fixed virtual address
     */
    // reserve frame for exception table
    void* virtaddr = frame_alloc( ONE_FRAME ,FRAME_KA);
    page_mapping_insert(AS_KERNEL, EXC_BASE_ADDRESS, KA2PA(virtaddr), flags );
    #endif
 
    // TODO: move to the kernel space
//  page_mapping_insert(AS_KERNEL, 0xffff0000, 0x00000000, flags);
    // TODO: remove when aux_printf not needed
//  page_mapping_insert(AS_KERNEL, 0x0000000, 0x0000000, flags);
    page_mapping_insert(AS_KERNEL, 0x1000000, 0x1000000, flags);
//  page_mapping_insert(AS_KERNEL, 0x1100000, 0x1100000, flags);
//  page_mapping_insert(AS_KERNEL, 0x1500000, 0x1500000, flags);
//  page_mapping_insert(AS_KERNEL, 0x1600000, 0x1600000, flags);
 
//  page_mapping_insert(AS_KERNEL, 0xffff0000, 0xffff0000, flags);
 
 
    as_switch(NULL, AS_KERNEL);
 
}
 
/**
 * Map device into kernel space.
 *
 * This function adds mapping of physical address that is read/write only
 *  from kernel and not bufferable.
 *
 * \param physaddr Physical addres where device is connected
 * \param size Length of area where device is present
 * \return Virtual address where device will be accessable
 * Note: This is copy of IA32 hw_map code
 */
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 | PAGE_READ | PAGE_WRITE | PAGE_KERNEL);
 
    last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);
 
    return virtaddr;
}
 
 
/** @}
 */
 
 

Subversion Repositories HelenOS

(root)/branches/arm/kernel/arch/arm32/src/mm/page.c – Rev 2278 → 2284

Rev 2278		Rev 2284
1	/*	1	/*
2	* Copyright (c) 2007 Pavel Jancik, Michal Kebrt	2	* Copyright (c) 2007 Pavel Jancik, Michal Kebrt
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 arm32mm	29	/** @addtogroup arm32mm
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 <mm/page.h>	37	#include <mm/page.h>
38	#include <align.h>	38	#include <align.h>
39	#include <config.h>	39	#include <config.h>
40	#include <arch/exception.h>	40	#include <arch/exception.h>
41	#include <typedefs.h>	41	#include <typedefs.h>
42	#include <arch/types.h>	42	#include <arch/types.h>
43	#include <interrupt.h>	43	#include <interrupt.h>
44	#include <arch/debug_print/print.h>	44	#include <arch/debug_print/print.h>
45		45
46		46
47	/**	47	/**
48	* Initializes kernel adress space page tables, sets abourts exceptions vectors	48	* Initializes kernel adress space page tables, sets abourts exceptions vectors
49	*/	49	*/
50	void page_arch_init(void)	50	void page_arch_init(void)
51	{	51	{
52	uintptr_t cur;	52	uintptr_t cur;
53	int flags;	53	int flags;
54		54
55	page_mapping_operations = &pt_mapping_operations;	55	page_mapping_operations = &pt_mapping_operations;
56		56
57	flags = PAGE_CACHEABLE;	57	flags = PAGE_CACHEABLE;
58		58
59	/* PA2KA(identity) mapping for all frames until last_frame */	59	/* PA2KA(identity) mapping for all frames until last_frame */
60	for (cur = 0; cur < last_frame; cur += FRAME_SIZE) {	60	for (cur = 0; cur < last_frame; cur += FRAME_SIZE) {
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	// Create mapping for exception table at high offcet	64	// Create mapping for exception table at high offcet
65	#ifdef HIGH_EXCEPTION_VECTORS	65	#ifdef HIGH_EXCEPTION_VECTORS
66	/* Note: this mapping cann't be done by hw_map because fixed exception	66	/* Note: this mapping cann't be done by hw_map because fixed exception
67	vector is stored at fixed virtual address	67	vector is stored at fixed virtual address
68	*/	68	*/
69	// reserve frame for exception table	69	// reserve frame for exception table
70	void* virtaddr = frame_alloc( ONE_FRAME ,FRAME_KA);	70	void* virtaddr = frame_alloc( ONE_FRAME ,FRAME_KA);
71	page_mapping_insert(AS_KERNEL, EXC_BASE_ADDRESS, KA2PA(virtaddr), flags );	71	page_mapping_insert(AS_KERNEL, EXC_BASE_ADDRESS, KA2PA(virtaddr), flags );
72	#endif	72	#endif
73		73
74	// TODO: move to the kernel space	74	// TODO: move to the kernel space
75	// page_mapping_insert(AS_KERNEL, 0xffff0000, 0x00000000, flags);	75	// page_mapping_insert(AS_KERNEL, 0xffff0000, 0x00000000, flags);
76	// TODO: remove when aux_printf not needed	76	// TODO: remove when aux_printf not needed
-		77	// page_mapping_insert(AS_KERNEL, 0x0000000, 0x0000000, flags);
77	page_mapping_insert(AS_KERNEL, 0x10000000, 0x10000000, flags);	78	page_mapping_insert(AS_KERNEL, 0x1000000, 0x1000000, flags);
-		79	// page_mapping_insert(AS_KERNEL, 0x1100000, 0x1100000, flags);
-		80	// page_mapping_insert(AS_KERNEL, 0x1500000, 0x1500000, flags);
-		81	// page_mapping_insert(AS_KERNEL, 0x1600000, 0x1600000, flags);
-		82
-		83	// page_mapping_insert(AS_KERNEL, 0xffff0000, 0xffff0000, flags);
78		84
79		85
80	as_switch(NULL, AS_KERNEL);	86	as_switch(NULL, AS_KERNEL);
81		87
82	}	88	}
83		89
84	/**	90	/**
85	* Map device into kernel space.	91	* Map device into kernel space.
86	*	92	*
87	* This function adds mapping of physical address that is read/write only	93	* This function adds mapping of physical address that is read/write only
88	* from kernel and not bufferable.	94	* from kernel and not bufferable.
89	*	95	*
90	* \param physaddr Physical addres where device is connected	96	* \param physaddr Physical addres where device is connected
91	* \param size Length of area where device is present	97	* \param size Length of area where device is present
92	* \return Virtual address where device will be accessable	98	* \return Virtual address where device will be accessable
93	* Note: This is copy of IA32 hw_map code	99	* Note: This is copy of IA32 hw_map code
94	*/	100	*/
95	uintptr_t hw_map(uintptr_t physaddr, size_t size)	101	uintptr_t hw_map(uintptr_t physaddr, size_t size)
96	{	102	{
97	if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH))	103	if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH))
98	panic("Unable to map physical memory %p (%d bytes)", physaddr, size)	104	panic("Unable to map physical memory %p (%d bytes)", physaddr, size)
99		105
100	uintptr_t virtaddr = PA2KA(last_frame);	106	uintptr_t virtaddr = PA2KA(last_frame);
101	pfn_t i;	107	pfn_t i;
102	for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++)	108	for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++)
103	page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), physaddr + PFN2ADDR(i), PAGE_NOT_CACHEABLE \| PAGE_READ \| PAGE_WRITE \| PAGE_KERNEL);	109	page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), physaddr + PFN2ADDR(i), PAGE_NOT_CACHEABLE \| PAGE_READ \| PAGE_WRITE \| PAGE_KERNEL);
104		110
105	last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);	111	last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);
106		112
107	return virtaddr;	113	return virtaddr;
108	}	114	}
109		115
110		116
111	/** @}	117	/** @}
112	*/	118	*/
113		119
114		120