WebSVN – HelenOS – Diff – /trunk/kernel/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.
 */
 
/** @addtogroup amd64mm
 * @{
 */
/** @file
 */
 
/** 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 KERN_amd64_PAGE_H_
#define KERN_amd64_PAGE_H_
 
#include <arch/mm/frame.h>
 
#define PAGE_WIDTH  FRAME_WIDTH
#define PAGE_SIZE   FRAME_SIZE
 
#ifdef KERNEL
 
#ifndef __ASM__
#   include <mm/mm.h>
#   include <arch/types.h>
#   include <arch/interrupt.h>
 
static inline uintptr_t ka2pa(uintptr_t x)
{
    if (x > 0xffffffff80000000)
        return x - 0xffffffff80000000;
    else
        return x - 0xffff800000000000;
}
 
#   define KA2PA(x)     ka2pa((uintptr_t) x)
#   define PA2KA_CODE(x)    (((uintptr_t) (x)) + 0xffffffff80000000)
#   define PA2KA(x)     (((uintptr_t) (x)) + 0xffff800000000000)
#else
#   define KA2PA(x)     ((x) - 0xffffffff80000000)
#   define PA2KA(x)     ((x) + 0xffffffff80000000)
#endif
 
/* Number of entries in each level. */
#define PTL0_ENTRIES_ARCH   512
#define PTL1_ENTRIES_ARCH   512
#define PTL2_ENTRIES_ARCH   512
#define PTL3_ENTRIES_ARCH   512
 
/* Page table sizes for each level. */
#define PTL0_SIZE_ARCH      ONE_FRAME
#define PTL1_SIZE_ARCH      ONE_FRAME
#define PTL2_SIZE_ARCH      ONE_FRAME
#define PTL3_SIZE_ARCH      ONE_FRAME
 
/* Macros calculating indices into page tables in each level. */
#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)
 
/* Get PTE address accessors for each level. */
#define GET_PTL1_ADDRESS_ARCH(ptl0, i) \
    ((pte_t *) ((((uint64_t) ((pte_t *) (ptl0))[(i)].addr_12_31) << 12) | \
        (((uint64_t) ((pte_t *) (ptl0))[(i)].addr_32_51) << 32)))
#define GET_PTL2_ADDRESS_ARCH(ptl1, i) \
    ((pte_t *) ((((uint64_t) ((pte_t *) (ptl1))[(i)].addr_12_31) << 12) | \
        (((uint64_t) ((pte_t *) (ptl1))[(i)].addr_32_51) << 32)))
#define GET_PTL3_ADDRESS_ARCH(ptl2, i) \
    ((pte_t *) ((((uint64_t) ((pte_t *) (ptl2))[(i)].addr_12_31) << 12) | \
        (((uint64_t) ((pte_t *) (ptl2))[(i)].addr_32_51) << 32)))
#define GET_FRAME_ADDRESS_ARCH(ptl3, i) \
    ((uintptr_t *) \
        ((((uint64_t) ((pte_t *) (ptl3))[(i)].addr_12_31) << 12) | \
        (((uint64_t) ((pte_t *) (ptl3))[(i)].addr_32_51) << 32)))
 
/* Set PTE address accessors for each level. */
#define SET_PTL0_ADDRESS_ARCH(ptl0) \
    (write_cr3((uintptr_t) (ptl0)))
#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) \
    set_pt_addr((pte_t *) (ptl0), (size_t) (i), a)
#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) \
    set_pt_addr((pte_t *) (ptl1), (size_t) (i), a)
#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) \
    set_pt_addr((pte_t *) (ptl2), (size_t) (i), a)
#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) \
    set_pt_addr((pte_t *) (ptl3), (size_t) (i), a)
 
/* Get PTE flags accessors for each level. */
#define GET_PTL1_FLAGS_ARCH(ptl0, i) \
    get_pt_flags((pte_t *) (ptl0), (size_t) (i))
#define GET_PTL2_FLAGS_ARCH(ptl1, i) \
    get_pt_flags((pte_t *) (ptl1), (size_t) (i))
#define GET_PTL3_FLAGS_ARCH(ptl2, i) \
    get_pt_flags((pte_t *) (ptl2), (size_t) (i))
#define GET_FRAME_FLAGS_ARCH(ptl3, i) \
    get_pt_flags((pte_t *) (ptl3), (size_t) (i))
 
/* Set PTE flags accessors for each level. */
#define SET_PTL1_FLAGS_ARCH(ptl0, i, x) \
    set_pt_flags((pte_t *) (ptl0), (size_t) (i), (x))
#define SET_PTL2_FLAGS_ARCH(ptl1, i, x) \
    set_pt_flags((pte_t *) (ptl1), (size_t) (i), (x))
#define SET_PTL3_FLAGS_ARCH(ptl2, i, x) \
    set_pt_flags((pte_t *) (ptl2), (size_t) (i), (x))
#define SET_FRAME_FLAGS_ARCH(ptl3, i, x) \
    set_pt_flags((pte_t *) (ptl3), (size_t) (i), (x))
 
/* Macros for querying the last-level PTE entries. */
#define PTE_VALID_ARCH(p) \
    (*((uint64_t *) (p)) != 0)
#define PTE_PRESENT_ARCH(p) \
    ((p)->present != 0)
#define PTE_GET_FRAME_ARCH(p) \
    ((((uintptr_t) (p)->addr_12_31) << 12) | \
        ((uintptr_t) (p)->addr_32_51 << 32))
#define PTE_WRITABLE_ARCH(p) \
    ((p)->writeable != 0)
#define PTE_EXECUTABLE_ARCH(p) \
    ((p)->no_execute == 0)
 
#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)
 
static inline int get_pt_flags(pte_t *pt, size_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, size_t i, uintptr_t 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, size_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);
extern void page_fault(int n, istate_t *istate);
 
#endif /* __ASM__ */
 
#endif /* KERNEL */
 
#endif
 
/** @}
 */
 

Subversion Repositories HelenOS

(root)/trunk/kernel/arch/amd64/include/mm/page.h @ 3870 – Rev 3233 → 4490

Rev 3233		Rev 4490
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	/** @addtogroup amd64mm	29	/** @addtogroup amd64mm
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	/** Paging on AMD64	35	/** Paging on AMD64
36	*	36	*
37	* The space is divided in positive numbers - userspace and	37	* The space is divided in positive numbers - userspace and
38	* negative numbers - kernel space. The 'negative' space starting	38	* negative numbers - kernel space. The 'negative' space starting
39	* with 0xffff800000000000 and ending with 0xffffffff80000000	39	* with 0xffff800000000000 and ending with 0xffffffff80000000
40	* (-2GB) is identically mapped physical memory. The area	40	* (-2GB) is identically mapped physical memory. The area
41	* (0xffffffff80000000 ... 0xffffffffffffffff is again identically	41	* (0xffffffff80000000 ... 0xffffffffffffffff is again identically
42	* mapped first 2GB.	42	* mapped first 2GB.
43	*	43	*
44	* ATTENTION - PA2KA(KA2PA(x)) != x if 'x' is in kernel	44	* ATTENTION - PA2KA(KA2PA(x)) != x if 'x' is in kernel
45	*/	45	*/
46		46
47	#ifndef KERN_amd64_PAGE_H_	47	#ifndef KERN_amd64_PAGE_H_
48	#define KERN_amd64_PAGE_H_	48	#define KERN_amd64_PAGE_H_
49		49
50	#include <arch/mm/frame.h>	50	#include <arch/mm/frame.h>
51		51
52	#define PAGE_WIDTH FRAME_WIDTH	52	#define PAGE_WIDTH FRAME_WIDTH
53	#define PAGE_SIZE FRAME_SIZE	53	#define PAGE_SIZE FRAME_SIZE
54		54
55	#ifdef KERNEL	55	#ifdef KERNEL
56		56
57	#ifndef __ASM__	57	#ifndef __ASM__
58	# include <mm/mm.h>	58	# include <mm/mm.h>
59	# include <arch/types.h>	59	# include <arch/types.h>
60	# include <arch/interrupt.h>	60	# include <arch/interrupt.h>
61		61
62	static inline uintptr_t ka2pa(uintptr_t x)	62	static inline uintptr_t ka2pa(uintptr_t x)
63	{	63	{
64	if (x > 0xffffffff80000000)	64	if (x > 0xffffffff80000000)
65	return x - 0xffffffff80000000;	65	return x - 0xffffffff80000000;
66	else	66	else
67	return x - 0xffff800000000000;	67	return x - 0xffff800000000000;
68	}	68	}
69		69
70	# define KA2PA(x) ka2pa((uintptr_t) x)	70	# define KA2PA(x) ka2pa((uintptr_t) x)
71	# define PA2KA_CODE(x) (((uintptr_t) (x)) + 0xffffffff80000000)	71	# define PA2KA_CODE(x) (((uintptr_t) (x)) + 0xffffffff80000000)
72	# define PA2KA(x) (((uintptr_t) (x)) + 0xffff800000000000)	72	# define PA2KA(x) (((uintptr_t) (x)) + 0xffff800000000000)
73	#else	73	#else
74	# define KA2PA(x) ((x) - 0xffffffff80000000)	74	# define KA2PA(x) ((x) - 0xffffffff80000000)
75	# define PA2KA(x) ((x) + 0xffffffff80000000)	75	# define PA2KA(x) ((x) + 0xffffffff80000000)
76	#endif	76	#endif
77		77
78	/* Number of entries in each level. */	78	/* Number of entries in each level. */
79	#define PTL0_ENTRIES_ARCH 512	79	#define PTL0_ENTRIES_ARCH 512
80	#define PTL1_ENTRIES_ARCH 512	80	#define PTL1_ENTRIES_ARCH 512
81	#define PTL2_ENTRIES_ARCH 512	81	#define PTL2_ENTRIES_ARCH 512
82	#define PTL3_ENTRIES_ARCH 512	82	#define PTL3_ENTRIES_ARCH 512
83		83
84	/* Page table sizes for each level. */	84	/* Page table sizes for each level. */
85	#define PTL0_SIZE_ARCH ONE_FRAME	85	#define PTL0_SIZE_ARCH ONE_FRAME
86	#define PTL1_SIZE_ARCH ONE_FRAME	86	#define PTL1_SIZE_ARCH ONE_FRAME
87	#define PTL2_SIZE_ARCH ONE_FRAME	87	#define PTL2_SIZE_ARCH ONE_FRAME
88	#define PTL3_SIZE_ARCH ONE_FRAME	88	#define PTL3_SIZE_ARCH ONE_FRAME
89		89
90	/* Macros calculating indices into page tables in each level. */	90	/* Macros calculating indices into page tables in each level. */
91	#define PTL0_INDEX_ARCH(vaddr) (((vaddr) >> 39) & 0x1ff)	91	#define PTL0_INDEX_ARCH(vaddr) (((vaddr) >> 39) & 0x1ff)
92	#define PTL1_INDEX_ARCH(vaddr) (((vaddr) >> 30) & 0x1ff)	92	#define PTL1_INDEX_ARCH(vaddr) (((vaddr) >> 30) & 0x1ff)
93	#define PTL2_INDEX_ARCH(vaddr) (((vaddr) >> 21) & 0x1ff)	93	#define PTL2_INDEX_ARCH(vaddr) (((vaddr) >> 21) & 0x1ff)
94	#define PTL3_INDEX_ARCH(vaddr) (((vaddr) >> 12) & 0x1ff)	94	#define PTL3_INDEX_ARCH(vaddr) (((vaddr) >> 12) & 0x1ff)
95		95
96	/* Get PTE address accessors for each level. */	96	/* Get PTE address accessors for each level. */
97	#define GET_PTL1_ADDRESS_ARCH(ptl0, i) \	97	#define GET_PTL1_ADDRESS_ARCH(ptl0, i) \
98	((pte_t ) ((((uint64_t) ((pte_t ) (ptl0))[(i)].addr_12_31) << 12) \| \	98	((pte_t ) ((((uint64_t) ((pte_t ) (ptl0))[(i)].addr_12_31) << 12) \| \
99	(((uint64_t) ((pte_t *) (ptl0))[(i)].addr_32_51) << 32)))	99	(((uint64_t) ((pte_t *) (ptl0))[(i)].addr_32_51) << 32)))
100	#define GET_PTL2_ADDRESS_ARCH(ptl1, i) \	100	#define GET_PTL2_ADDRESS_ARCH(ptl1, i) \
101	((pte_t ) ((((uint64_t) ((pte_t ) (ptl1))[(i)].addr_12_31) << 12) \| \	101	((pte_t ) ((((uint64_t) ((pte_t ) (ptl1))[(i)].addr_12_31) << 12) \| \
102	(((uint64_t) ((pte_t *) (ptl1))[(i)].addr_32_51) << 32)))	102	(((uint64_t) ((pte_t *) (ptl1))[(i)].addr_32_51) << 32)))
103	#define GET_PTL3_ADDRESS_ARCH(ptl2, i) \	103	#define GET_PTL3_ADDRESS_ARCH(ptl2, i) \
104	((pte_t ) ((((uint64_t) ((pte_t ) (ptl2))[(i)].addr_12_31) << 12) \| \	104	((pte_t ) ((((uint64_t) ((pte_t ) (ptl2))[(i)].addr_12_31) << 12) \| \
105	(((uint64_t) ((pte_t *) (ptl2))[(i)].addr_32_51) << 32)))	105	(((uint64_t) ((pte_t *) (ptl2))[(i)].addr_32_51) << 32)))
106	#define GET_FRAME_ADDRESS_ARCH(ptl3, i) \	106	#define GET_FRAME_ADDRESS_ARCH(ptl3, i) \
107	((uintptr_t *) \	107	((uintptr_t *) \
108	((((uint64_t) ((pte_t *) (ptl3))[(i)].addr_12_31) << 12) \| \	108	((((uint64_t) ((pte_t *) (ptl3))[(i)].addr_12_31) << 12) \| \
109	(((uint64_t) ((pte_t *) (ptl3))[(i)].addr_32_51) << 32)))	109	(((uint64_t) ((pte_t *) (ptl3))[(i)].addr_32_51) << 32)))
110		110
111	/* Set PTE address accessors for each level. */	111	/* Set PTE address accessors for each level. */
112	#define SET_PTL0_ADDRESS_ARCH(ptl0) \	112	#define SET_PTL0_ADDRESS_ARCH(ptl0) \
113	(write_cr3((uintptr_t) (ptl0)))	113	(write_cr3((uintptr_t) (ptl0)))
114	#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) \	114	#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) \
115	set_pt_addr((pte_t *) (ptl0), (index_t) (i), a)	115	set_pt_addr((pte_t *) (ptl0), (size_t) (i), a)
116	#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) \	116	#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) \
117	set_pt_addr((pte_t *) (ptl1), (index_t) (i), a)	117	set_pt_addr((pte_t *) (ptl1), (size_t) (i), a)
118	#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) \	118	#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) \
119	set_pt_addr((pte_t *) (ptl2), (index_t) (i), a)	119	set_pt_addr((pte_t *) (ptl2), (size_t) (i), a)
120	#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) \	120	#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) \
121	set_pt_addr((pte_t *) (ptl3), (index_t) (i), a)	121	set_pt_addr((pte_t *) (ptl3), (size_t) (i), a)
122		122
123	/* Get PTE flags accessors for each level. */	123	/* Get PTE flags accessors for each level. */
124	#define GET_PTL1_FLAGS_ARCH(ptl0, i) \	124	#define GET_PTL1_FLAGS_ARCH(ptl0, i) \
125	get_pt_flags((pte_t *) (ptl0), (index_t) (i))	125	get_pt_flags((pte_t *) (ptl0), (size_t) (i))
126	#define GET_PTL2_FLAGS_ARCH(ptl1, i) \	126	#define GET_PTL2_FLAGS_ARCH(ptl1, i) \
127	get_pt_flags((pte_t *) (ptl1), (index_t) (i))	127	get_pt_flags((pte_t *) (ptl1), (size_t) (i))
128	#define GET_PTL3_FLAGS_ARCH(ptl2, i) \	128	#define GET_PTL3_FLAGS_ARCH(ptl2, i) \
129	get_pt_flags((pte_t *) (ptl2), (index_t) (i))	129	get_pt_flags((pte_t *) (ptl2), (size_t) (i))
130	#define GET_FRAME_FLAGS_ARCH(ptl3, i) \	130	#define GET_FRAME_FLAGS_ARCH(ptl3, i) \
131	get_pt_flags((pte_t *) (ptl3), (index_t) (i))	131	get_pt_flags((pte_t *) (ptl3), (size_t) (i))
132		132
133	/* Set PTE flags accessors for each level. */	133	/* Set PTE flags accessors for each level. */
134	#define SET_PTL1_FLAGS_ARCH(ptl0, i, x) \	134	#define SET_PTL1_FLAGS_ARCH(ptl0, i, x) \
135	set_pt_flags((pte_t *) (ptl0), (index_t) (i), (x))	135	set_pt_flags((pte_t *) (ptl0), (size_t) (i), (x))
136	#define SET_PTL2_FLAGS_ARCH(ptl1, i, x) \	136	#define SET_PTL2_FLAGS_ARCH(ptl1, i, x) \
137	set_pt_flags((pte_t *) (ptl1), (index_t) (i), (x))	137	set_pt_flags((pte_t *) (ptl1), (size_t) (i), (x))
138	#define SET_PTL3_FLAGS_ARCH(ptl2, i, x) \	138	#define SET_PTL3_FLAGS_ARCH(ptl2, i, x) \
139	set_pt_flags((pte_t *) (ptl2), (index_t) (i), (x))	139	set_pt_flags((pte_t *) (ptl2), (size_t) (i), (x))
140	#define SET_FRAME_FLAGS_ARCH(ptl3, i, x) \	140	#define SET_FRAME_FLAGS_ARCH(ptl3, i, x) \
141	set_pt_flags((pte_t *) (ptl3), (index_t) (i), (x))	141	set_pt_flags((pte_t *) (ptl3), (size_t) (i), (x))
142		142
143	/* Macros for querying the last-level PTE entries. */	143	/* Macros for querying the last-level PTE entries. */
144	#define PTE_VALID_ARCH(p) \	144	#define PTE_VALID_ARCH(p) \
145	(((uint64_t ) (p)) != 0)	145	(((uint64_t ) (p)) != 0)
146	#define PTE_PRESENT_ARCH(p) \	146	#define PTE_PRESENT_ARCH(p) \
147	((p)->present != 0)	147	((p)->present != 0)
148	#define PTE_GET_FRAME_ARCH(p) \	148	#define PTE_GET_FRAME_ARCH(p) \
149	((((uintptr_t) (p)->addr_12_31) << 12) \| \	149	((((uintptr_t) (p)->addr_12_31) << 12) \| \
150	((uintptr_t) (p)->addr_32_51 << 32))	150	((uintptr_t) (p)->addr_32_51 << 32))
151	#define PTE_WRITABLE_ARCH(p) \	151	#define PTE_WRITABLE_ARCH(p) \
152	((p)->writeable != 0)	152	((p)->writeable != 0)
153	#define PTE_EXECUTABLE_ARCH(p) \	153	#define PTE_EXECUTABLE_ARCH(p) \
154	((p)->no_execute == 0)	154	((p)->no_execute == 0)
155		155
156	#ifndef __ASM__	156	#ifndef __ASM__
157		157
158	/* Page fault error codes. */	158	/* Page fault error codes. */
159		159
160	/** When bit on this position is 0, the page fault was caused by a not-present	160	/** When bit on this position is 0, the page fault was caused by a not-present
161	* page.	161	* page.
162	*/	162	*/
163	#define PFERR_CODE_P (1 << 0)	163	#define PFERR_CODE_P (1 << 0)
164		164
165	/** When bit on this position is 1, the page fault was caused by a write. */	165	/** When bit on this position is 1, the page fault was caused by a write. */
166	#define PFERR_CODE_RW (1 << 1)	166	#define PFERR_CODE_RW (1 << 1)
167		167
168	/** When bit on this position is 1, the page fault was caused in user mode. */	168	/** When bit on this position is 1, the page fault was caused in user mode. */
169	#define PFERR_CODE_US (1 << 2)	169	#define PFERR_CODE_US (1 << 2)
170		170
171	/** When bit on this position is 1, a reserved bit was set in page directory. */	171	/** When bit on this position is 1, a reserved bit was set in page directory. */
172	#define PFERR_CODE_RSVD (1 << 3)	172	#define PFERR_CODE_RSVD (1 << 3)
173		173
174	/** When bit on this position os 1, the page fault was caused during instruction	174	/** When bit on this position os 1, the page fault was caused during instruction
175	* fecth.	175	* fecth.
176	*/	176	*/
177	#define PFERR_CODE_ID (1 << 4)	177	#define PFERR_CODE_ID (1 << 4)
178		178
179	static inline int get_pt_flags(pte_t *pt, index_t i)	179	static inline int get_pt_flags(pte_t *pt, size_t i)
180	{	180	{
181	pte_t *p = &pt[i];	181	pte_t *p = &pt[i];
182		182
183	return ((!p->page_cache_disable) << PAGE_CACHEABLE_SHIFT \|	183	return ((!p->page_cache_disable) << PAGE_CACHEABLE_SHIFT \|
184	(!p->present) << PAGE_PRESENT_SHIFT \|	184	(!p->present) << PAGE_PRESENT_SHIFT \|
185	p->uaccessible << PAGE_USER_SHIFT \|	185	p->uaccessible << PAGE_USER_SHIFT \|
186	1 << PAGE_READ_SHIFT \|	186	1 << PAGE_READ_SHIFT \|
187	p->writeable << PAGE_WRITE_SHIFT \|	187	p->writeable << PAGE_WRITE_SHIFT \|
188	(!p->no_execute) << PAGE_EXEC_SHIFT \|	188	(!p->no_execute) << PAGE_EXEC_SHIFT \|
189	p->global << PAGE_GLOBAL_SHIFT);	189	p->global << PAGE_GLOBAL_SHIFT);
190	}	190	}
191		191
192	static inline void set_pt_addr(pte_t *pt, index_t i, uintptr_t a)	192	static inline void set_pt_addr(pte_t *pt, size_t i, uintptr_t a)
193	{	193	{
194	pte_t *p = &pt[i];	194	pte_t *p = &pt[i];
195		195
196	p->addr_12_31 = (a >> 12) & 0xfffff;	196	p->addr_12_31 = (a >> 12) & 0xfffff;
197	p->addr_32_51 = a >> 32;	197	p->addr_32_51 = a >> 32;
198	}	198	}
199		199
200	static inline void set_pt_flags(pte_t *pt, index_t i, int flags)	200	static inline void set_pt_flags(pte_t *pt, size_t i, int flags)
201	{	201	{
202	pte_t *p = &pt[i];	202	pte_t *p = &pt[i];
203		203
204	p->page_cache_disable = !(flags & PAGE_CACHEABLE);	204	p->page_cache_disable = !(flags & PAGE_CACHEABLE);
205	p->present = !(flags & PAGE_NOT_PRESENT);	205	p->present = !(flags & PAGE_NOT_PRESENT);
206	p->uaccessible = (flags & PAGE_USER) != 0;	206	p->uaccessible = (flags & PAGE_USER) != 0;
207	p->writeable = (flags & PAGE_WRITE) != 0;	207	p->writeable = (flags & PAGE_WRITE) != 0;
208	p->no_execute = (flags & PAGE_EXEC) == 0;	208	p->no_execute = (flags & PAGE_EXEC) == 0;
209	p->global = (flags & PAGE_GLOBAL) != 0;	209	p->global = (flags & PAGE_GLOBAL) != 0;
210		210
211	/*	211	/*
212	* Ensure that there is at least one bit set even if the present bit is cleared.	212	* Ensure that there is at least one bit set even if the present bit is cleared.
213	*/	213	*/
214	p->soft_valid = 1;	214	p->soft_valid = 1;
215	}	215	}
216		216
217	extern void page_arch_init(void);	217	extern void page_arch_init(void);
218	extern void page_fault(int n, istate_t *istate);	218	extern void page_fault(int n, istate_t *istate);
219		219
220	#endif /* __ASM__ */	220	#endif /* __ASM__ */
221		221
222	#endif /* KERNEL */	222	#endif /* KERNEL */
223		223
224	#endif	224	#endif
225		225
226	/** @}	226	/** @}
227	*/	227	*/
228		228