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__
 
#define PAGE_SIZE   FRAME_SIZE
 
#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_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))
 
#ifndef __ASM__
 
#include <mm/page.h>
#include <arch/types.h>
#include <arch/mm/frame.h>
#include <typedefs.h>
 
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 : 2;
    unsigned avl : 3;
    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
    );
}
 
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;
}
 
extern void page_arch_init(void);
 
#endif /* __ASM__ */
 
#endif
 

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/ia32/include/mm/page.h – Rev 534 → 760

Rev 534		Rev 760
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	#define PAGE_SIZE FRAME_SIZE	32	#define PAGE_SIZE FRAME_SIZE
33		33
34	#ifndef __ASM__	34	#ifndef __ASM__
35	# define KA2PA(x) (((__address) (x)) - 0x80000000)	35	# define KA2PA(x) (((__address) (x)) - 0x80000000)
36	# define PA2KA(x) (((__address) (x)) + 0x80000000)	36	# define PA2KA(x) (((__address) (x)) + 0x80000000)
37	#else	37	#else
38	# define KA2PA(x) ((x) - 0x80000000)	38	# define KA2PA(x) ((x) - 0x80000000)
39	# define PA2KA(x) ((x) + 0x80000000)	39	# define PA2KA(x) ((x) + 0x80000000)
40	#endif	40	#endif
41		41
42	/*	42	/*
43	* Implementation of generic 4-level page table interface.	43	* Implementation of generic 4-level page table interface.
44	* IA-32 has 2-level page tables, so PTL1 and PTL2 are left out.	44	* IA-32 has 2-level page tables, so PTL1 and PTL2 are left out.
45	*/	45	*/
46	#define PTL0_INDEX_ARCH(vaddr) (((vaddr)>>22)&0x3ff)	46	#define PTL0_INDEX_ARCH(vaddr) (((vaddr)>>22)&0x3ff)
47	#define PTL1_INDEX_ARCH(vaddr) 0	47	#define PTL1_INDEX_ARCH(vaddr) 0
48	#define PTL2_INDEX_ARCH(vaddr) 0	48	#define PTL2_INDEX_ARCH(vaddr) 0
49	#define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>12)&0x3ff)	49	#define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>12)&0x3ff)
50		50
51	#define GET_PTL0_ADDRESS_ARCH() ((pte_t *) read_cr3())	-
52	#define GET_PTL1_ADDRESS_ARCH(ptl0, i) ((pte_t )((((pte_t )(ptl0))[(i)].frame_address)<<12))	51	#define GET_PTL1_ADDRESS_ARCH(ptl0, i) ((pte_t )((((pte_t )(ptl0))[(i)].frame_address)<<12))
53	#define GET_PTL2_ADDRESS_ARCH(ptl1, i) (ptl1)	52	#define GET_PTL2_ADDRESS_ARCH(ptl1, i) (ptl1)
54	#define GET_PTL3_ADDRESS_ARCH(ptl2, i) (ptl2)	53	#define GET_PTL3_ADDRESS_ARCH(ptl2, i) (ptl2)
55	#define GET_FRAME_ADDRESS_ARCH(ptl3, i) ((__address)((((pte_t *)(ptl3))[(i)].frame_address)<<12))	54	#define GET_FRAME_ADDRESS_ARCH(ptl3, i) ((__address)((((pte_t *)(ptl3))[(i)].frame_address)<<12))
56		55
57	#define SET_PTL0_ADDRESS_ARCH(ptl0) (write_cr3((__address) (ptl0)))	56	#define SET_PTL0_ADDRESS_ARCH(ptl0) (write_cr3((__address) (ptl0)))
58	#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) (((pte_t *)(ptl0))[(i)].frame_address = (a)>>12)	57	#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) (((pte_t *)(ptl0))[(i)].frame_address = (a)>>12)
59	#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a)	58	#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a)
60	#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a)	59	#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a)
61	#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) (((pte_t *)(ptl3))[(i)].frame_address = (a)>>12)	60	#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) (((pte_t *)(ptl3))[(i)].frame_address = (a)>>12)
62		61
63	#define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i))	62	#define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i))
64	#define GET_PTL2_FLAGS_ARCH(ptl1, i) PAGE_PRESENT	63	#define GET_PTL2_FLAGS_ARCH(ptl1, i) PAGE_PRESENT
65	#define GET_PTL3_FLAGS_ARCH(ptl2, i) PAGE_PRESENT	64	#define GET_PTL3_FLAGS_ARCH(ptl2, i) PAGE_PRESENT
66	#define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i))	65	#define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i))
67		66
68	#define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x))	67	#define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x))
69	#define SET_PTL2_FLAGS_ARCH(ptl1, i, x)	68	#define SET_PTL2_FLAGS_ARCH(ptl1, i, x)
70	#define SET_PTL3_FLAGS_ARCH(ptl2, i, x)	69	#define SET_PTL3_FLAGS_ARCH(ptl2, i, x)
71	#define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x))	70	#define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x))
72		71
73	#ifndef __ASM__	72	#ifndef __ASM__
74		73
75	#include <mm/page.h>	74	#include <mm/page.h>
76	#include <arch/types.h>	75	#include <arch/types.h>
77	#include <arch/mm/frame.h>	76	#include <arch/mm/frame.h>
78	#include <typedefs.h>	77	#include <typedefs.h>
79		78
80	struct page_specifier {	79	struct page_specifier {
81	unsigned present : 1;	80	unsigned present : 1;
82	unsigned writeable : 1;	81	unsigned writeable : 1;
83	unsigned uaccessible : 1;	82	unsigned uaccessible : 1;
84	unsigned page_write_through : 1;	83	unsigned page_write_through : 1;
85	unsigned page_cache_disable : 1;	84	unsigned page_cache_disable : 1;
86	unsigned accessed : 1;	85	unsigned accessed : 1;
87	unsigned dirty : 1;	86	unsigned dirty : 1;
88	unsigned : 2;	87	unsigned : 2;
89	unsigned avl : 3;	88	unsigned avl : 3;
90	unsigned frame_address : 20;	89	unsigned frame_address : 20;
91	} __attribute__ ((packed));	90	} __attribute__ ((packed));
92		91
93	static inline int get_pt_flags(pte_t *pt, index_t i)	92	static inline int get_pt_flags(pte_t *pt, index_t i)
94	{	93	{
95	pte_t *p = &pt[i];	94	pte_t *p = &pt[i];
96		95
97	return (	96	return (
98	(!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT \|	97	(!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT \|
99	(!p->present)<<PAGE_PRESENT_SHIFT \|	98	(!p->present)<<PAGE_PRESENT_SHIFT \|
100	p->uaccessible<<PAGE_USER_SHIFT \|	99	p->uaccessible<<PAGE_USER_SHIFT \|
101	1<<PAGE_READ_SHIFT \|	100	1<<PAGE_READ_SHIFT \|
102	p->writeable<<PAGE_WRITE_SHIFT \|	101	p->writeable<<PAGE_WRITE_SHIFT \|
103	1<<PAGE_EXEC_SHIFT	102	1<<PAGE_EXEC_SHIFT
104	);	103	);
105	}	104	}
106		105
107	static inline void set_pt_flags(pte_t *pt, index_t i, int flags)	106	static inline void set_pt_flags(pte_t *pt, index_t i, int flags)
108	{	107	{
109	pte_t *p = &pt[i];	108	pte_t *p = &pt[i];
110		109
111	p->page_cache_disable = !(flags & PAGE_CACHEABLE);	110	p->page_cache_disable = !(flags & PAGE_CACHEABLE);
112	p->present = !(flags & PAGE_NOT_PRESENT);	111	p->present = !(flags & PAGE_NOT_PRESENT);
113	p->uaccessible = (flags & PAGE_USER) != 0;	112	p->uaccessible = (flags & PAGE_USER) != 0;
114	p->writeable = (flags & PAGE_WRITE) != 0;	113	p->writeable = (flags & PAGE_WRITE) != 0;
115	}	114	}
116		115
117	extern void page_arch_init(void);	116	extern void page_arch_init(void);
118		117
119	#endif /* __ASM__ */	118	#endif /* __ASM__ */
120		119
121	#endif	120	#endif
122		121