WebSVN – HelenOS-historic – Diff – /kernel/trunk/arch/amd64/include/mm/page.h


/*
 * Copyright (C) 2005 Ondrej Palkovsky
 * 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 __amd64_PAGE_H__
#define __amd64_PAGE_H__
 
#include <arch/mm/frame.h>
 
#ifndef __ASM__
#  include <mm/page.h>
#  include <arch/types.h>
#endif
 
#define PAGE_WIDTH  FRAME_WIDTH
#define PAGE_SIZE   FRAME_SIZE
 
#ifndef __ASM__
# define KA2PA(x)      (((__address) (x)) - 0xffffffff80000000)
# define PA2KA(x)      (((__address) (x)) + 0xffffffff80000000)
#else
# define KA2PA(x)      ((x) - 0xffffffff80000000)
# define PA2KA(x)      ((x) + 0xffffffff80000000)
#endif
 
#define PTL0_ENTRIES_ARCH   512
#define PTL1_ENTRIES_ARCH   512
#define PTL2_ENTRIES_ARCH   512
#define PTL3_ENTRIES_ARCH   512
 
#define PTL0_INDEX_ARCH(vaddr)  (((vaddr)>>39)&0x1ff)
#define PTL1_INDEX_ARCH(vaddr)  (((vaddr)>>30)&0x1ff)
#define PTL2_INDEX_ARCH(vaddr)  (((vaddr)>>21)&0x1ff)
#define PTL3_INDEX_ARCH(vaddr)  (((vaddr)>>12)&0x1ff)
 
#define GET_PTL1_ADDRESS_ARCH(ptl0, i)      ((pte_t *) ((((__u64) ((pte_t *)(ptl0))[(i)].addr_12_31)<<12) | (((__u64) ((pte_t *)(ptl0))[(i)].addr_32_51)<<32 )))
#define GET_PTL2_ADDRESS_ARCH(ptl1, i)      ((pte_t *) ((((__u64) ((pte_t *)(ptl1))[(i)].addr_12_31)<<12) | (((__u64) ((pte_t *)(ptl1))[(i)].addr_32_51)<<32 )))
#define GET_PTL3_ADDRESS_ARCH(ptl2, i)      ((pte_t *) ((((__u64) ((pte_t *)(ptl2))[(i)].addr_12_31)<<12) | (((__u64) ((pte_t *)(ptl2))[(i)].addr_32_51)<<32 )))
#define GET_FRAME_ADDRESS_ARCH(ptl3, i)     ((__address *) ((((__u64) ((pte_t *)(ptl3))[(i)].addr_12_31)<<12) | (((__u64) ((pte_t *)(ptl3))[(i)].addr_32_51)<<32 )))
 
#define SET_PTL0_ADDRESS_ARCH(ptl0)     (write_cr3((__address) (ptl0)))
#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a)   set_pt_addr((pte_t *)(ptl0), (index_t)(i), a)
#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a)       set_pt_addr((pte_t *)(ptl1), (index_t)(i), a)
#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a)       set_pt_addr((pte_t *)(ptl2), (index_t)(i), a)
#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a)  set_pt_addr((pte_t *)(ptl3), (index_t)(i), a)
 
#define GET_PTL1_FLAGS_ARCH(ptl0, i)        get_pt_flags((pte_t *)(ptl0), (index_t)(i))
#define GET_PTL2_FLAGS_ARCH(ptl1, i)        get_pt_flags((pte_t *)(ptl1), (index_t)(i))
#define GET_PTL3_FLAGS_ARCH(ptl2, i)        get_pt_flags((pte_t *)(ptl2), (index_t)(i))
#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)         set_pt_flags((pte_t *)(ptl1), (index_t)(i), (x))
#define SET_PTL3_FLAGS_ARCH(ptl2, i, x)         set_pt_flags((pte_t *)(ptl2), (index_t)(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)           (*((__u64 *) (p)) != 0)
 
#ifndef __ASM__
 
/** 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 unused: 1;
    unsigned global : 1;
    unsigned soft_valid : 1;        /**< Valid content even if present bit is cleared. */
    unsigned avl : 2;
    unsigned addr_12_31 : 30;
    unsigned addr_32_51 : 21;
    unsigned no_execute : 1;
} __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 |
        (!p->no_execute)<<PAGE_EXEC_SHIFT |
        p->global<<PAGE_GLOBAL_SHIFT
    );
}
 
static inline void set_pt_addr(pte_t *pt, index_t i, __address a)
{
    pte_t *p = &pt[i];
 
    p->addr_12_31 = (a >> 12) & 0xfffff;
    p->addr_32_51 = a >> 32;
}
 
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->no_execute = (flags & PAGE_EXEC) == 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 = 1;
}
 
extern void page_arch_init(void);
 
#endif
 
#endif
 

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/amd64/include/mm/page.h – Rev 831 → 832

Rev 831		Rev 832
1	/*	1	/*
2	* Copyright (C) 2005 Ondrej Palkovsky	2	* Copyright (C) 2005 Ondrej Palkovsky
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 __amd64_PAGE_H__	29	#ifndef __amd64_PAGE_H__
30	#define __amd64_PAGE_H__	30	#define __amd64_PAGE_H__
31		31
32	#include <arch/mm/frame.h>	32	#include <arch/mm/frame.h>
33		33
34	#ifndef __ASM__	34	#ifndef __ASM__
35	# include <mm/page.h>	35	# include <mm/page.h>
36	# include <arch/types.h>	36	# include <arch/types.h>
37	#endif	37	#endif
38		38
39	#define PAGE_WIDTH FRAME_WIDTH	39	#define PAGE_WIDTH FRAME_WIDTH
40	#define PAGE_SIZE FRAME_SIZE	40	#define PAGE_SIZE FRAME_SIZE
41		41
42	#ifndef __ASM__	42	#ifndef __ASM__
43	# define KA2PA(x) (((__address) (x)) - 0xffffffff80000000)	43	# define KA2PA(x) (((__address) (x)) - 0xffffffff80000000)
44	# define PA2KA(x) (((__address) (x)) + 0xffffffff80000000)	44	# define PA2KA(x) (((__address) (x)) + 0xffffffff80000000)
45	#else	45	#else
46	# define KA2PA(x) ((x) - 0xffffffff80000000)	46	# define KA2PA(x) ((x) - 0xffffffff80000000)
47	# define PA2KA(x) ((x) + 0xffffffff80000000)	47	# define PA2KA(x) ((x) + 0xffffffff80000000)
48	#endif	48	#endif
49		49
-		50	#define PTL0_ENTRIES_ARCH 512
-		51	#define PTL1_ENTRIES_ARCH 512
-		52	#define PTL2_ENTRIES_ARCH 512
-		53	#define PTL3_ENTRIES_ARCH 512
-		54
50	#define PTL0_INDEX_ARCH(vaddr) (((vaddr)>>39)&0x1ff)	55	#define PTL0_INDEX_ARCH(vaddr) (((vaddr)>>39)&0x1ff)
51	#define PTL1_INDEX_ARCH(vaddr) (((vaddr)>>30)&0x1ff)	56	#define PTL1_INDEX_ARCH(vaddr) (((vaddr)>>30)&0x1ff)
52	#define PTL2_INDEX_ARCH(vaddr) (((vaddr)>>21)&0x1ff)	57	#define PTL2_INDEX_ARCH(vaddr) (((vaddr)>>21)&0x1ff)
53	#define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>12)&0x1ff)	58	#define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>12)&0x1ff)
54		59
55	#define GET_PTL1_ADDRESS_ARCH(ptl0, i) ((pte_t ) ((((__u64) ((pte_t )(ptl0))[(i)].addr_12_31)<<12) \| (((__u64) ((pte_t *)(ptl0))[(i)].addr_32_51)<<32 )))	60	#define GET_PTL1_ADDRESS_ARCH(ptl0, i) ((pte_t ) ((((__u64) ((pte_t )(ptl0))[(i)].addr_12_31)<<12) \| (((__u64) ((pte_t *)(ptl0))[(i)].addr_32_51)<<32 )))
56	#define GET_PTL2_ADDRESS_ARCH(ptl1, i) ((pte_t ) ((((__u64) ((pte_t )(ptl1))[(i)].addr_12_31)<<12) \| (((__u64) ((pte_t *)(ptl1))[(i)].addr_32_51)<<32 )))	61	#define GET_PTL2_ADDRESS_ARCH(ptl1, i) ((pte_t ) ((((__u64) ((pte_t )(ptl1))[(i)].addr_12_31)<<12) \| (((__u64) ((pte_t *)(ptl1))[(i)].addr_32_51)<<32 )))
57	#define GET_PTL3_ADDRESS_ARCH(ptl2, i) ((pte_t ) ((((__u64) ((pte_t )(ptl2))[(i)].addr_12_31)<<12) \| (((__u64) ((pte_t *)(ptl2))[(i)].addr_32_51)<<32 )))	62	#define GET_PTL3_ADDRESS_ARCH(ptl2, i) ((pte_t ) ((((__u64) ((pte_t )(ptl2))[(i)].addr_12_31)<<12) \| (((__u64) ((pte_t *)(ptl2))[(i)].addr_32_51)<<32 )))
58	#define GET_FRAME_ADDRESS_ARCH(ptl3, i) ((__address ) ((((__u64) ((pte_t )(ptl3))[(i)].addr_12_31)<<12) \| (((__u64) ((pte_t *)(ptl3))[(i)].addr_32_51)<<32 )))	63	#define GET_FRAME_ADDRESS_ARCH(ptl3, i) ((__address ) ((((__u64) ((pte_t )(ptl3))[(i)].addr_12_31)<<12) \| (((__u64) ((pte_t *)(ptl3))[(i)].addr_32_51)<<32 )))
59		64
60	#define SET_PTL0_ADDRESS_ARCH(ptl0) (write_cr3((__address) (ptl0)))	65	#define SET_PTL0_ADDRESS_ARCH(ptl0) (write_cr3((__address) (ptl0)))
61	#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) set_pt_addr((pte_t *)(ptl0), (index_t)(i), a)	66	#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) set_pt_addr((pte_t *)(ptl0), (index_t)(i), a)
62	#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) set_pt_addr((pte_t *)(ptl1), (index_t)(i), a)	67	#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) set_pt_addr((pte_t *)(ptl1), (index_t)(i), a)
63	#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) set_pt_addr((pte_t *)(ptl2), (index_t)(i), a)	68	#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) set_pt_addr((pte_t *)(ptl2), (index_t)(i), a)
64	#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) set_pt_addr((pte_t *)(ptl3), (index_t)(i), a)	69	#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) set_pt_addr((pte_t *)(ptl3), (index_t)(i), a)
65		70
66	#define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i))	71	#define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i))
67	#define GET_PTL2_FLAGS_ARCH(ptl1, i) get_pt_flags((pte_t *)(ptl1), (index_t)(i))	72	#define GET_PTL2_FLAGS_ARCH(ptl1, i) get_pt_flags((pte_t *)(ptl1), (index_t)(i))
68	#define GET_PTL3_FLAGS_ARCH(ptl2, i) get_pt_flags((pte_t *)(ptl2), (index_t)(i))	73	#define GET_PTL3_FLAGS_ARCH(ptl2, i) get_pt_flags((pte_t *)(ptl2), (index_t)(i))
69	#define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i))	74	#define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i))
70		75
71	#define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x))	76	#define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x))
72	#define SET_PTL2_FLAGS_ARCH(ptl1, i, x) set_pt_flags((pte_t *)(ptl1), (index_t)(i), (x))	77	#define SET_PTL2_FLAGS_ARCH(ptl1, i, x) set_pt_flags((pte_t *)(ptl1), (index_t)(i), (x))
73	#define SET_PTL3_FLAGS_ARCH(ptl2, i, x) set_pt_flags((pte_t *)(ptl2), (index_t)(i), (x))	78	#define SET_PTL3_FLAGS_ARCH(ptl2, i, x) set_pt_flags((pte_t *)(ptl2), (index_t)(i), (x))
74	#define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x))	79	#define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x))
75		80
-		81	#define PTE_VALID_ARCH(p) (((__u64 ) (p)) != 0)
-		82
76	#ifndef __ASM__	83	#ifndef __ASM__
77		84
78	/** Page Table Entry. */	85	/** Page Table Entry. */
79	struct page_specifier {	86	struct page_specifier {
80	unsigned present : 1;	87	unsigned present : 1;
81	unsigned writeable : 1;	88	unsigned writeable : 1;
82	unsigned uaccessible : 1;	89	unsigned uaccessible : 1;
83	unsigned page_write_through : 1;	90	unsigned page_write_through : 1;
84	unsigned page_cache_disable : 1;	91	unsigned page_cache_disable : 1;
85	unsigned accessed : 1;	92	unsigned accessed : 1;
86	unsigned dirty : 1;	93	unsigned dirty : 1;
87	unsigned unused: 1;	94	unsigned unused: 1;
88	unsigned global : 1;	95	unsigned global : 1;
89	unsigned soft_valid : 1; /*< Valid content even if present bit is cleared. /	96	unsigned soft_valid : 1; /*< Valid content even if present bit is cleared. /
90	unsigned avl : 2;	97	unsigned avl : 2;
91	unsigned addr_12_31 : 30;	98	unsigned addr_12_31 : 30;
92	unsigned addr_32_51 : 21;	99	unsigned addr_32_51 : 21;
93	unsigned no_execute : 1;	100	unsigned no_execute : 1;
94	} __attribute__ ((packed));	101	} __attribute__ ((packed));
95		102
96	static inline int get_pt_flags(pte_t *pt, index_t i)	103	static inline int get_pt_flags(pte_t *pt, index_t i)
97	{	104	{
98	pte_t *p = &pt[i];	105	pte_t *p = &pt[i];
99		106
100	return (	107	return (
101	(!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT \|	108	(!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT \|
102	(!p->present)<<PAGE_PRESENT_SHIFT \|	109	(!p->present)<<PAGE_PRESENT_SHIFT \|
103	p->uaccessible<<PAGE_USER_SHIFT \|	110	p->uaccessible<<PAGE_USER_SHIFT \|
104	1<<PAGE_READ_SHIFT \|	111	1<<PAGE_READ_SHIFT \|
105	p->writeable<<PAGE_WRITE_SHIFT \|	112	p->writeable<<PAGE_WRITE_SHIFT \|
106	(!p->no_execute)<<PAGE_EXEC_SHIFT \|	113	(!p->no_execute)<<PAGE_EXEC_SHIFT \|
107	p->global<<PAGE_GLOBAL_SHIFT	114	p->global<<PAGE_GLOBAL_SHIFT
108	);	115	);
109	}	116	}
110		117
111	static inline void set_pt_addr(pte_t *pt, index_t i, __address a)	118	static inline void set_pt_addr(pte_t *pt, index_t i, __address a)
112	{	119	{
113	pte_t *p = &pt[i];	120	pte_t *p = &pt[i];
114		121
115	p->addr_12_31 = (a >> 12) & 0xfffff;	122	p->addr_12_31 = (a >> 12) & 0xfffff;
116	p->addr_32_51 = a >> 32;	123	p->addr_32_51 = a >> 32;
117	}	124	}
118		125
119	static inline void set_pt_flags(pte_t *pt, index_t i, int flags)	126	static inline void set_pt_flags(pte_t *pt, index_t i, int flags)
120	{	127	{
121	pte_t *p = &pt[i];	128	pte_t *p = &pt[i];
122		129
123	p->page_cache_disable = !(flags & PAGE_CACHEABLE);	130	p->page_cache_disable = !(flags & PAGE_CACHEABLE);
124	p->present = !(flags & PAGE_NOT_PRESENT);	131	p->present = !(flags & PAGE_NOT_PRESENT);
125	p->uaccessible = (flags & PAGE_USER) != 0;	132	p->uaccessible = (flags & PAGE_USER) != 0;
126	p->writeable = (flags & PAGE_WRITE) != 0;	133	p->writeable = (flags & PAGE_WRITE) != 0;
127	p->no_execute = (flags & PAGE_EXEC) == 0;	134	p->no_execute = (flags & PAGE_EXEC) == 0;
128	p->global = (flags & PAGE_GLOBAL) != 0;	135	p->global = (flags & PAGE_GLOBAL) != 0;
129		136
130	/*	137	/*
131	* Ensure that there is at least one bit set even if the present bit is cleared.	138	* Ensure that there is at least one bit set even if the present bit is cleared.
132	*/	139	*/
133	p->soft_valid = 1;	140	p->soft_valid = 1;
134	}	141	}
135		142
136	extern void page_arch_init(void);	143	extern void page_arch_init(void);
137		144
138	#endif	145	#endif
139		146
140	#endif	147	#endif
141		148