WebSVN – HelenOS-historic – Diff – /kernel/trunk/arch/ia32/include/mm/page.h


/*
 * 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.
 */
 
#ifndef __ia32_PAGE_H__
#define __ia32_PAGE_H__
 
#include <arch/mm/frame.h>
 
#define PAGE_WIDTH  FRAME_WIDTH
#define PAGE_SIZE   FRAME_SIZE
 
#ifdef KERNEL
 
#ifndef __ASM__
#   define KA2PA(x) (((__address) (x)) - 0x80000000)
#   define PA2KA(x) (((__address) (x)) + 0x80000000)
#else
#   define KA2PA(x) ((x) - 0x80000000)
#   define PA2KA(x) ((x) + 0x80000000)
#endif
 
/*
 * Implementation of generic 4-level page table interface.
 * IA-32 has 2-level page tables, so PTL1 and PTL2 are left out.
 */
#define PTL0_ENTRIES_ARCH   1024
#define PTL1_ENTRIES_ARCH   0
#define PTL2_ENTRIES_ARCH   0
#define PTL3_ENTRIES_ARCH   1024
 
#define PTL0_INDEX_ARCH(vaddr)  (((vaddr)>>22)&0x3ff)
#define PTL1_INDEX_ARCH(vaddr)  0
#define PTL2_INDEX_ARCH(vaddr)  0
#define PTL3_INDEX_ARCH(vaddr)  (((vaddr)>>12)&0x3ff)
 
#define GET_PTL1_ADDRESS_ARCH(ptl0, i)      ((pte_t *)((((pte_t *)(ptl0))[(i)].frame_address)<<12))
#define GET_PTL2_ADDRESS_ARCH(ptl1, i)      (ptl1)
#define GET_PTL3_ADDRESS_ARCH(ptl2, i)      (ptl2)
#define GET_FRAME_ADDRESS_ARCH(ptl3, i)     ((__address)((((pte_t *)(ptl3))[(i)].frame_address)<<12))
 
#define SET_PTL0_ADDRESS_ARCH(ptl0)     (write_cr3((__address) (ptl0)))
#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a)   (((pte_t *)(ptl0))[(i)].frame_address = (a)>>12)
#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a)
#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a)
#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a)  (((pte_t *)(ptl3))[(i)].frame_address = (a)>>12)
 
#define GET_PTL1_FLAGS_ARCH(ptl0, i)        get_pt_flags((pte_t *)(ptl0), (index_t)(i))
#define GET_PTL2_FLAGS_ARCH(ptl1, i)        PAGE_PRESENT
#define GET_PTL3_FLAGS_ARCH(ptl2, i)        PAGE_PRESENT
#define GET_FRAME_FLAGS_ARCH(ptl3, i)       get_pt_flags((pte_t *)(ptl3), (index_t)(i))
 
#define SET_PTL1_FLAGS_ARCH(ptl0, i, x)     set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x))
#define SET_PTL2_FLAGS_ARCH(ptl1, i, x)
#define SET_PTL3_FLAGS_ARCH(ptl2, i, x)
#define SET_FRAME_FLAGS_ARCH(ptl3, i, x)    set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x))
 
#define PTE_VALID_ARCH(p)           (*((__u32 *) (p)) != 0)
 
#ifndef __ASM__
 
#include <mm/page.h>
#include <arch/types.h>
#include <arch/mm/frame.h>
#include <typedefs.h>
 
/** Page Table Entry. */
struct page_specifier {
    unsigned present : 1;
    unsigned writeable : 1;
    unsigned uaccessible : 1;
    unsigned page_write_through : 1;
    unsigned page_cache_disable : 1;
    unsigned accessed : 1;
    unsigned dirty : 1;
    unsigned pat : 1;
    unsigned global : 1;
    unsigned soft_valid : 1;    /**< Valid content even if the present bit is not set. */
    unsigned avl : 2;
    unsigned frame_address : 20;
} __attribute__ ((packed));
 
static inline int get_pt_flags(pte_t *pt, index_t i)
{
    pte_t *p = &pt[i];
   
    return (
        (!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT |
        (!p->present)<<PAGE_PRESENT_SHIFT |
        p->uaccessible<<PAGE_USER_SHIFT |
        1<<PAGE_READ_SHIFT |
        p->writeable<<PAGE_WRITE_SHIFT |
        1<<PAGE_EXEC_SHIFT |
        p->global<<PAGE_GLOBAL_SHIFT
    );
}
 
static inline void set_pt_flags(pte_t *pt, index_t i, int flags)
{
    pte_t *p = &pt[i];
   
    p->page_cache_disable = !(flags & PAGE_CACHEABLE);
    p->present = !(flags & PAGE_NOT_PRESENT);
    p->uaccessible = (flags & PAGE_USER) != 0;
    p->writeable = (flags & PAGE_WRITE) != 0;
    p->global = (flags & PAGE_GLOBAL) != 0;
   
    /*
     * Ensure that there is at least one bit set even if the present bit is cleared.
     */
    p->soft_valid = true;
}
 
extern void page_arch_init(void);
 
#endif /* __ASM__ */
 
#endif /* KERNEL */
 
#endif
 

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/ia32/include/mm/page.h – Rev 957 → 967

Rev 957		Rev 967
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	#ifndef __ia32_PAGE_H__	29	#ifndef __ia32_PAGE_H__
30	#define __ia32_PAGE_H__	30	#define __ia32_PAGE_H__
31		31
-		32	#include <arch/mm/frame.h>
-		33
32	#define PAGE_WIDTH FRAME_WIDTH	34	#define PAGE_WIDTH FRAME_WIDTH
33	#define PAGE_SIZE FRAME_SIZE	35	#define PAGE_SIZE FRAME_SIZE
34		36
-		37	#ifdef KERNEL
-		38
35	#ifndef __ASM__	39	#ifndef __ASM__
36	# define KA2PA(x) (((__address) (x)) - 0x80000000)	40	# define KA2PA(x) (((__address) (x)) - 0x80000000)
37	# define PA2KA(x) (((__address) (x)) + 0x80000000)	41	# define PA2KA(x) (((__address) (x)) + 0x80000000)
38	#else	42	#else
39	# define KA2PA(x) ((x) - 0x80000000)	43	# define KA2PA(x) ((x) - 0x80000000)
40	# define PA2KA(x) ((x) + 0x80000000)	44	# define PA2KA(x) ((x) + 0x80000000)
41	#endif	45	#endif
42		46
43	/*	47	/*
44	* Implementation of generic 4-level page table interface.	48	* Implementation of generic 4-level page table interface.
45	* IA-32 has 2-level page tables, so PTL1 and PTL2 are left out.	49	* IA-32 has 2-level page tables, so PTL1 and PTL2 are left out.
46	*/	50	*/
47	#define PTL0_ENTRIES_ARCH 1024	51	#define PTL0_ENTRIES_ARCH 1024
48	#define PTL1_ENTRIES_ARCH 0	52	#define PTL1_ENTRIES_ARCH 0
49	#define PTL2_ENTRIES_ARCH 0	53	#define PTL2_ENTRIES_ARCH 0
50	#define PTL3_ENTRIES_ARCH 1024	54	#define PTL3_ENTRIES_ARCH 1024
51		55
52	#define PTL0_INDEX_ARCH(vaddr) (((vaddr)>>22)&0x3ff)	56	#define PTL0_INDEX_ARCH(vaddr) (((vaddr)>>22)&0x3ff)
53	#define PTL1_INDEX_ARCH(vaddr) 0	57	#define PTL1_INDEX_ARCH(vaddr) 0
54	#define PTL2_INDEX_ARCH(vaddr) 0	58	#define PTL2_INDEX_ARCH(vaddr) 0
55	#define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>12)&0x3ff)	59	#define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>12)&0x3ff)
56		60
57	#define GET_PTL1_ADDRESS_ARCH(ptl0, i) ((pte_t )((((pte_t )(ptl0))[(i)].frame_address)<<12))	61	#define GET_PTL1_ADDRESS_ARCH(ptl0, i) ((pte_t )((((pte_t )(ptl0))[(i)].frame_address)<<12))
58	#define GET_PTL2_ADDRESS_ARCH(ptl1, i) (ptl1)	62	#define GET_PTL2_ADDRESS_ARCH(ptl1, i) (ptl1)
59	#define GET_PTL3_ADDRESS_ARCH(ptl2, i) (ptl2)	63	#define GET_PTL3_ADDRESS_ARCH(ptl2, i) (ptl2)
60	#define GET_FRAME_ADDRESS_ARCH(ptl3, i) ((__address)((((pte_t *)(ptl3))[(i)].frame_address)<<12))	64	#define GET_FRAME_ADDRESS_ARCH(ptl3, i) ((__address)((((pte_t *)(ptl3))[(i)].frame_address)<<12))
61		65
62	#define SET_PTL0_ADDRESS_ARCH(ptl0) (write_cr3((__address) (ptl0)))	66	#define SET_PTL0_ADDRESS_ARCH(ptl0) (write_cr3((__address) (ptl0)))
63	#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) (((pte_t *)(ptl0))[(i)].frame_address = (a)>>12)	67	#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) (((pte_t *)(ptl0))[(i)].frame_address = (a)>>12)
64	#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a)	68	#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a)
65	#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a)	69	#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a)
66	#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) (((pte_t *)(ptl3))[(i)].frame_address = (a)>>12)	70	#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) (((pte_t *)(ptl3))[(i)].frame_address = (a)>>12)
67		71
68	#define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i))	72	#define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i))
69	#define GET_PTL2_FLAGS_ARCH(ptl1, i) PAGE_PRESENT	73	#define GET_PTL2_FLAGS_ARCH(ptl1, i) PAGE_PRESENT
70	#define GET_PTL3_FLAGS_ARCH(ptl2, i) PAGE_PRESENT	74	#define GET_PTL3_FLAGS_ARCH(ptl2, i) PAGE_PRESENT
71	#define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i))	75	#define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i))
72		76
73	#define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x))	77	#define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x))
74	#define SET_PTL2_FLAGS_ARCH(ptl1, i, x)	78	#define SET_PTL2_FLAGS_ARCH(ptl1, i, x)
75	#define SET_PTL3_FLAGS_ARCH(ptl2, i, x)	79	#define SET_PTL3_FLAGS_ARCH(ptl2, i, x)
76	#define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x))	80	#define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x))
77		81
78	#define PTE_VALID_ARCH(p) (((__u32 ) (p)) != 0)	82	#define PTE_VALID_ARCH(p) (((__u32 ) (p)) != 0)
79		83
80	#ifndef __ASM__	84	#ifndef __ASM__
81		85
82	#include <mm/page.h>	86	#include <mm/page.h>
83	#include <arch/types.h>	87	#include <arch/types.h>
84	#include <arch/mm/frame.h>	88	#include <arch/mm/frame.h>
85	#include <typedefs.h>	89	#include <typedefs.h>
86		90
87	/** Page Table Entry. */	91	/** Page Table Entry. */
88	struct page_specifier {	92	struct page_specifier {
89	unsigned present : 1;	93	unsigned present : 1;
90	unsigned writeable : 1;	94	unsigned writeable : 1;
91	unsigned uaccessible : 1;	95	unsigned uaccessible : 1;
92	unsigned page_write_through : 1;	96	unsigned page_write_through : 1;
93	unsigned page_cache_disable : 1;	97	unsigned page_cache_disable : 1;
94	unsigned accessed : 1;	98	unsigned accessed : 1;
95	unsigned dirty : 1;	99	unsigned dirty : 1;
96	unsigned pat : 1;	100	unsigned pat : 1;
97	unsigned global : 1;	101	unsigned global : 1;
98	unsigned soft_valid : 1; /*< Valid content even if the present bit is not set. /	102	unsigned soft_valid : 1; /*< Valid content even if the present bit is not set. /
99	unsigned avl : 2;	103	unsigned avl : 2;
100	unsigned frame_address : 20;	104	unsigned frame_address : 20;
101	} __attribute__ ((packed));	105	} __attribute__ ((packed));
102		106
103	static inline int get_pt_flags(pte_t *pt, index_t i)	107	static inline int get_pt_flags(pte_t *pt, index_t i)
104	{	108	{
105	pte_t *p = &pt[i];	109	pte_t *p = &pt[i];
106		110
107	return (	111	return (
108	(!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT \|	112	(!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT \|
109	(!p->present)<<PAGE_PRESENT_SHIFT \|	113	(!p->present)<<PAGE_PRESENT_SHIFT \|
110	p->uaccessible<<PAGE_USER_SHIFT \|	114	p->uaccessible<<PAGE_USER_SHIFT \|
111	1<<PAGE_READ_SHIFT \|	115	1<<PAGE_READ_SHIFT \|
112	p->writeable<<PAGE_WRITE_SHIFT \|	116	p->writeable<<PAGE_WRITE_SHIFT \|
113	1<<PAGE_EXEC_SHIFT \|	117	1<<PAGE_EXEC_SHIFT \|
114	p->global<<PAGE_GLOBAL_SHIFT	118	p->global<<PAGE_GLOBAL_SHIFT
115	);	119	);
116	}	120	}
117		121
118	static inline void set_pt_flags(pte_t *pt, index_t i, int flags)	122	static inline void set_pt_flags(pte_t *pt, index_t i, int flags)
119	{	123	{
120	pte_t *p = &pt[i];	124	pte_t *p = &pt[i];
121		125
122	p->page_cache_disable = !(flags & PAGE_CACHEABLE);	126	p->page_cache_disable = !(flags & PAGE_CACHEABLE);
123	p->present = !(flags & PAGE_NOT_PRESENT);	127	p->present = !(flags & PAGE_NOT_PRESENT);
124	p->uaccessible = (flags & PAGE_USER) != 0;	128	p->uaccessible = (flags & PAGE_USER) != 0;
125	p->writeable = (flags & PAGE_WRITE) != 0;	129	p->writeable = (flags & PAGE_WRITE) != 0;
126	p->global = (flags & PAGE_GLOBAL) != 0;	130	p->global = (flags & PAGE_GLOBAL) != 0;
127		131
128	/*	132	/*
129	* Ensure that there is at least one bit set even if the present bit is cleared.	133	* Ensure that there is at least one bit set even if the present bit is cleared.
130	*/	134	*/
131	p->soft_valid = true;	135	p->soft_valid = true;
132	}	136	}
133		137
134	extern void page_arch_init(void);	138	extern void page_arch_init(void);
135		139
136	#endif /* __ASM__ */	140	#endif /* __ASM__ */
137		141
-		142	#endif /* KERNEL */
-		143
138	#endif	144	#endif
139		145