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.
 */
 
/** Paging on AMD64
 *
 * The space is divided in positive numbers - userspace and
 * negative numbers - kernel space. The 'negative' space starting
 * with 0xffff800000000000 and ending with 0xffffffff80000000
 * (-2GB) is identically mapped physical memory. The area
 * (0xffffffff80000000 ... 0xffffffffffffffff is again identically
 * mapped first 2GB.
 *
 * ATTENTION - PA2KA(KA2PA(x)) != x if 'x' is in kernel
 */
 
#ifndef __amd64_PAGE_H__
#define __amd64_PAGE_H__
 
#include <arch/mm/frame.h>
 
#define PAGE_WIDTH  FRAME_WIDTH
#define PAGE_SIZE   FRAME_SIZE
 
#ifdef KERNEL
 
#ifndef __ASM__
#  include <mm/page.h>
#  include <arch/types.h>
#endif
 
#ifndef __ASM__
static inline __address ka2pa(__address x)
{
    if (x > 0xffffffff80000000)
        return x - 0xffffffff80000000;
    else
        return x - 0xffff800000000000;
}
# define KA2PA(x)      ka2pa((__address)x)
# define PA2KA_CODE(x)      (((__address) (x)) + 0xffffffff80000000)
# define PA2KA(x)      (((__address) (x)) + 0xffff800000000000)
#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)
#define PTE_PRESENT_ARCH(p)         ((p)->present != 0)
#define PTE_GET_FRAME_ARCH(p)           ((((__address)(p)->addr_12_31)<<12) | ((__address)(p)->addr_32_51<<32))
 
#ifndef __ASM__
 
/* Page fault error codes. */
 
/** When bit on this position is 0, the page fault was caused by a not-present page. */
#define PFERR_CODE_P            (1<<0)  
 
/** When bit on this position is 1, the page fault was caused by a write. */
#define PFERR_CODE_RW           (1<<1)
 
/** When bit on this position is 1, the page fault was caused in user mode. */
#define PFERR_CODE_US           (1<<2)
 
/** When bit on this position is 1, a reserved bit was set in page directory. */
#define PFERR_CODE_RSVD         (1<<3)
 
/** When bit on this position os 1, the page fault was caused during instruction fecth. */
#define PFERR_CODE_ID       (1<<4)
 
/** 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 /* __ASM__ */
 
#endif /* KERNEL */
 
#endif
 

Rev 1064	Rev 1411
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	/** Paging on AMD64	29	/** Paging on AMD64
30	*	30	*
31	* The space is divided in positive numbers - userspace and	31	* The space is divided in positive numbers - userspace and
32	* negative numbers - kernel space. The 'negative' space starting	32	* negative numbers - kernel space. The 'negative' space starting
33	* with 0xffff800000000000 and ending with 0xffffffff80000000	33	* with 0xffff800000000000 and ending with 0xffffffff80000000
34	* (-2GB) is identically mapped physical memory. The area	34	* (-2GB) is identically mapped physical memory. The area
35	* (0xffffffff80000000 ... 0xffffffffffffffff is again identically	35	* (0xffffffff80000000 ... 0xffffffffffffffff is again identically
36	* mapped first 2GB.	36	* mapped first 2GB.
37	*	37	*
38	* ATTENTION - PA2KA(KA2PA(x)) != x if 'x' is in kernel	38	* ATTENTION - PA2KA(KA2PA(x)) != x if 'x' is in kernel
39	*/	39	*/
40		40
41	#ifndef __amd64_PAGE_H__	41	#ifndef __amd64_PAGE_H__
42	#define __amd64_PAGE_H__	42	#define __amd64_PAGE_H__
43		43
44	#include <arch/mm/frame.h>	44	#include <arch/mm/frame.h>
45		45
46	#define PAGE_WIDTH FRAME_WIDTH	46	#define PAGE_WIDTH FRAME_WIDTH
47	#define PAGE_SIZE FRAME_SIZE	47	#define PAGE_SIZE FRAME_SIZE
48		48
49	#ifdef KERNEL	49	#ifdef KERNEL
50		50
51	#ifndef __ASM__	51	#ifndef __ASM__
52	# include <mm/page.h>	52	# include <mm/page.h>
53	# include <arch/types.h>	53	# include <arch/types.h>
54	#endif	54	#endif
55		55
56	#ifndef __ASM__	56	#ifndef __ASM__
57	static inline __address ka2pa(__address x)	57	static inline __address ka2pa(__address x)
58	{	58	{
59	if (x > 0xffffffff80000000)	59	if (x > 0xffffffff80000000)
60	return x - 0xffffffff80000000;	60	return x - 0xffffffff80000000;
61	else	61	else
62	return x - 0xffff800000000000;	62	return x - 0xffff800000000000;
63	}	63	}
64	# define KA2PA(x) ka2pa((__address)x)	64	# define KA2PA(x) ka2pa((__address)x)
65	# define PA2KA_CODE(x) (((__address) (x)) + 0xffffffff80000000)	65	# define PA2KA_CODE(x) (((__address) (x)) + 0xffffffff80000000)
66	# define PA2KA(x) (((__address) (x)) + 0xffff800000000000)	66	# define PA2KA(x) (((__address) (x)) + 0xffff800000000000)
67	#else	67	#else
68	# define KA2PA(x) ((x) - 0xffffffff80000000)	68	# define KA2PA(x) ((x) - 0xffffffff80000000)
69	# define PA2KA(x) ((x) + 0xffffffff80000000)	69	# define PA2KA(x) ((x) + 0xffffffff80000000)
70	#endif	70	#endif
71		71
72	#define PTL0_ENTRIES_ARCH 512	72	#define PTL0_ENTRIES_ARCH 512
73	#define PTL1_ENTRIES_ARCH 512	73	#define PTL1_ENTRIES_ARCH 512
74	#define PTL2_ENTRIES_ARCH 512	74	#define PTL2_ENTRIES_ARCH 512
75	#define PTL3_ENTRIES_ARCH 512	75	#define PTL3_ENTRIES_ARCH 512
76		76
77	#define PTL0_INDEX_ARCH(vaddr) (((vaddr)>>39)&0x1ff)	77	#define PTL0_INDEX_ARCH(vaddr) (((vaddr)>>39)&0x1ff)
78	#define PTL1_INDEX_ARCH(vaddr) (((vaddr)>>30)&0x1ff)	78	#define PTL1_INDEX_ARCH(vaddr) (((vaddr)>>30)&0x1ff)
79	#define PTL2_INDEX_ARCH(vaddr) (((vaddr)>>21)&0x1ff)	79	#define PTL2_INDEX_ARCH(vaddr) (((vaddr)>>21)&0x1ff)
80	#define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>12)&0x1ff)	80	#define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>12)&0x1ff)
81		81
82	#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 )))	82	#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 )))
83	#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 )))	83	#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 )))
84	#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 )))	84	#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 )))
85	#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 )))	85	#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 )))
86		86
87	#define SET_PTL0_ADDRESS_ARCH(ptl0) (write_cr3((__address) (ptl0)))	87	#define SET_PTL0_ADDRESS_ARCH(ptl0) (write_cr3((__address) (ptl0)))
88	#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) set_pt_addr((pte_t *)(ptl0), (index_t)(i), a)	88	#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) set_pt_addr((pte_t *)(ptl0), (index_t)(i), a)
89	#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) set_pt_addr((pte_t *)(ptl1), (index_t)(i), a)	89	#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) set_pt_addr((pte_t *)(ptl1), (index_t)(i), a)
90	#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) set_pt_addr((pte_t *)(ptl2), (index_t)(i), a)	90	#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) set_pt_addr((pte_t *)(ptl2), (index_t)(i), a)
91	#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) set_pt_addr((pte_t *)(ptl3), (index_t)(i), a)	91	#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) set_pt_addr((pte_t *)(ptl3), (index_t)(i), a)
92		92
93	#define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i))	93	#define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i))
94	#define GET_PTL2_FLAGS_ARCH(ptl1, i) get_pt_flags((pte_t *)(ptl1), (index_t)(i))	94	#define GET_PTL2_FLAGS_ARCH(ptl1, i) get_pt_flags((pte_t *)(ptl1), (index_t)(i))
95	#define GET_PTL3_FLAGS_ARCH(ptl2, i) get_pt_flags((pte_t *)(ptl2), (index_t)(i))	95	#define GET_PTL3_FLAGS_ARCH(ptl2, i) get_pt_flags((pte_t *)(ptl2), (index_t)(i))
96	#define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i))	96	#define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i))
97		97
98	#define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x))	98	#define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x))
99	#define SET_PTL2_FLAGS_ARCH(ptl1, i, x) set_pt_flags((pte_t *)(ptl1), (index_t)(i), (x))	99	#define SET_PTL2_FLAGS_ARCH(ptl1, i, x) set_pt_flags((pte_t *)(ptl1), (index_t)(i), (x))
100	#define SET_PTL3_FLAGS_ARCH(ptl2, i, x) set_pt_flags((pte_t *)(ptl2), (index_t)(i), (x))	100	#define SET_PTL3_FLAGS_ARCH(ptl2, i, x) set_pt_flags((pte_t *)(ptl2), (index_t)(i), (x))
101	#define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x))	101	#define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x))
102		102
103	#define PTE_VALID_ARCH(p) (((__u64 ) (p)) != 0)	103	#define PTE_VALID_ARCH(p) (((__u64 ) (p)) != 0)
104	#define PTE_PRESENT_ARCH(p) ((p)->present != 0)	104	#define PTE_PRESENT_ARCH(p) ((p)->present != 0)
105	#define PTE_GET_FRAME_ARCH(p) ((((__address)(p)->addr_12_31)<<12) \| ((__address)(p)->addr_32_51<<32))	105	#define PTE_GET_FRAME_ARCH(p) ((((__address)(p)->addr_12_31)<<12) \| ((__address)(p)->addr_32_51<<32))
106		106
107	#ifndef __ASM__	107	#ifndef __ASM__
108		108
-		109	/* Page fault error codes. */
-		110
-		111	/** When bit on this position is 0, the page fault was caused by a not-present page. */
-		112	#define PFERR_CODE_P (1<<0)
-		113
-		114	/** When bit on this position is 1, the page fault was caused by a write. */
-		115	#define PFERR_CODE_RW (1<<1)
-		116
-		117	/** When bit on this position is 1, the page fault was caused in user mode. */
-		118	#define PFERR_CODE_US (1<<2)
-		119
-		120	/** When bit on this position is 1, a reserved bit was set in page directory. */
-		121	#define PFERR_CODE_RSVD (1<<3)
-		122
-		123	/** When bit on this position os 1, the page fault was caused during instruction fecth. */
-		124	#define PFERR_CODE_ID (1<<4)
-		125
109	/** Page Table Entry. */	126	/** Page Table Entry. */
110	struct page_specifier {	127	struct page_specifier {
111	unsigned present : 1;	128	unsigned present : 1;
112	unsigned writeable : 1;	129	unsigned writeable : 1;
113	unsigned uaccessible : 1;	130	unsigned uaccessible : 1;
114	unsigned page_write_through : 1;	131	unsigned page_write_through : 1;
115	unsigned page_cache_disable : 1;	132	unsigned page_cache_disable : 1;
116	unsigned accessed : 1;	133	unsigned accessed : 1;
117	unsigned dirty : 1;	134	unsigned dirty : 1;
118	unsigned unused: 1;	135	unsigned unused: 1;
119	unsigned global : 1;	136	unsigned global : 1;
120	unsigned soft_valid : 1; /*< Valid content even if present bit is cleared. /	137	unsigned soft_valid : 1; /*< Valid content even if present bit is cleared. /
121	unsigned avl : 2;	138	unsigned avl : 2;
122	unsigned addr_12_31 : 30;	139	unsigned addr_12_31 : 30;
123	unsigned addr_32_51 : 21;	140	unsigned addr_32_51 : 21;
124	unsigned no_execute : 1;	141	unsigned no_execute : 1;
125	} __attribute__ ((packed));	142	} __attribute__ ((packed));
126		143
127	static inline int get_pt_flags(pte_t *pt, index_t i)	144	static inline int get_pt_flags(pte_t *pt, index_t i)
128	{	145	{
129	pte_t *p = &pt[i];	146	pte_t *p = &pt[i];
130		147
131	return (	148	return (
132	(!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT \|	149	(!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT \|
133	(!p->present)<<PAGE_PRESENT_SHIFT \|	150	(!p->present)<<PAGE_PRESENT_SHIFT \|
134	p->uaccessible<<PAGE_USER_SHIFT \|	151	p->uaccessible<<PAGE_USER_SHIFT \|
135	1<<PAGE_READ_SHIFT \|	152	1<<PAGE_READ_SHIFT \|
136	p->writeable<<PAGE_WRITE_SHIFT \|	153	p->writeable<<PAGE_WRITE_SHIFT \|
137	(!p->no_execute)<<PAGE_EXEC_SHIFT \|	154	(!p->no_execute)<<PAGE_EXEC_SHIFT \|
138	p->global<<PAGE_GLOBAL_SHIFT	155	p->global<<PAGE_GLOBAL_SHIFT
139	);	156	);
140	}	157	}
141		158
142	static inline void set_pt_addr(pte_t *pt, index_t i, __address a)	159	static inline void set_pt_addr(pte_t *pt, index_t i, __address a)
143	{	160	{
144	pte_t *p = &pt[i];	161	pte_t *p = &pt[i];
145		162
146	p->addr_12_31 = (a >> 12) & 0xfffff;	163	p->addr_12_31 = (a >> 12) & 0xfffff;
147	p->addr_32_51 = a >> 32;	164	p->addr_32_51 = a >> 32;
148	}	165	}
149		166
150	static inline void set_pt_flags(pte_t *pt, index_t i, int flags)	167	static inline void set_pt_flags(pte_t *pt, index_t i, int flags)
151	{	168	{
152	pte_t *p = &pt[i];	169	pte_t *p = &pt[i];
153		170
154	p->page_cache_disable = !(flags & PAGE_CACHEABLE);	171	p->page_cache_disable = !(flags & PAGE_CACHEABLE);
155	p->present = !(flags & PAGE_NOT_PRESENT);	172	p->present = !(flags & PAGE_NOT_PRESENT);
156	p->uaccessible = (flags & PAGE_USER) != 0;	173	p->uaccessible = (flags & PAGE_USER) != 0;
157	p->writeable = (flags & PAGE_WRITE) != 0;	174	p->writeable = (flags & PAGE_WRITE) != 0;
158	p->no_execute = (flags & PAGE_EXEC) == 0;	175	p->no_execute = (flags & PAGE_EXEC) == 0;
159	p->global = (flags & PAGE_GLOBAL) != 0;	176	p->global = (flags & PAGE_GLOBAL) != 0;
160		177
161	/*	178	/*
162	* Ensure that there is at least one bit set even if the present bit is cleared.	179	* Ensure that there is at least one bit set even if the present bit is cleared.
163	*/	180	*/
164	p->soft_valid = 1;	181	p->soft_valid = 1;
165	}	182	}
166		183
167	extern void page_arch_init(void);	184	extern void page_arch_init(void);
168		185
169	#endif /* __ASM__ */	186	#endif /* __ASM__ */
170		187
171	#endif /* KERNEL */	188	#endif /* KERNEL */
172		189
173	#endif	190	#endif
174		191

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(root)/kernel/trunk/arch/amd64/include/mm/page.h – Rev 1064 → 1411