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
 
#define PAGE_COLOR_BITS 0           /* dummy */
 
#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
 
#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 *) ((((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 )))
 
#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), (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)           (*((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, 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, 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, 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);
extern void page_fault(int n, istate_t *istate);
 
#endif /* __ASM__ */
 
#endif /* KERNEL */
 
#endif
 
/** @}
 */
 

Rev 2071	Rev 2089
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	#define PAGE_COLOR_BITS 0 /* dummy */	55	#define PAGE_COLOR_BITS 0 /* dummy */
56		56
57	#ifdef KERNEL	57	#ifdef KERNEL
58		58
59	#ifndef __ASM__	59	#ifndef __ASM__
60	# include <mm/page.h>	60	# include <mm/mm.h>
61	# include <arch/types.h>	61	# include <arch/types.h>
62	#endif	62	# include <arch/interrupt.h>
63		63
64	#ifndef __ASM__	-
65	static inline uintptr_t ka2pa(uintptr_t x)	64	static inline uintptr_t ka2pa(uintptr_t x)
66	{	65	{
67	if (x > 0xffffffff80000000)	66	if (x > 0xffffffff80000000)
68	return x - 0xffffffff80000000;	67	return x - 0xffffffff80000000;
69	else	68	else
70	return x - 0xffff800000000000;	69	return x - 0xffff800000000000;
71	}	70	}
-		71
72	# define KA2PA(x) ka2pa((uintptr_t)x)	72	# define KA2PA(x) ka2pa((uintptr_t)x)
73	# define PA2KA_CODE(x) (((uintptr_t) (x)) + 0xffffffff80000000)	73	# define PA2KA_CODE(x) (((uintptr_t) (x)) + 0xffffffff80000000)
74	# define PA2KA(x) (((uintptr_t) (x)) + 0xffff800000000000)	74	# define PA2KA(x) (((uintptr_t) (x)) + 0xffff800000000000)
75	#else	75	#else
76	# define KA2PA(x) ((x) - 0xffffffff80000000)	76	# define KA2PA(x) ((x) - 0xffffffff80000000)
77	# define PA2KA(x) ((x) + 0xffffffff80000000)	77	# define PA2KA(x) ((x) + 0xffffffff80000000)
78	#endif	78	#endif
79		79
80	#define PTL0_ENTRIES_ARCH 512	80	#define PTL0_ENTRIES_ARCH 512
81	#define PTL1_ENTRIES_ARCH 512	81	#define PTL1_ENTRIES_ARCH 512
82	#define PTL2_ENTRIES_ARCH 512	82	#define PTL2_ENTRIES_ARCH 512
83	#define PTL3_ENTRIES_ARCH 512	83	#define PTL3_ENTRIES_ARCH 512
84		84
85	#define PTL0_INDEX_ARCH(vaddr) (((vaddr)>>39)&0x1ff)	85	#define PTL0_INDEX_ARCH(vaddr) (((vaddr)>>39)&0x1ff)
86	#define PTL1_INDEX_ARCH(vaddr) (((vaddr)>>30)&0x1ff)	86	#define PTL1_INDEX_ARCH(vaddr) (((vaddr)>>30)&0x1ff)
87	#define PTL2_INDEX_ARCH(vaddr) (((vaddr)>>21)&0x1ff)	87	#define PTL2_INDEX_ARCH(vaddr) (((vaddr)>>21)&0x1ff)
88	#define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>12)&0x1ff)	88	#define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>12)&0x1ff)
89		89
90	#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 )))	90	#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 )))
91	#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 )))	91	#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 )))
92	#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 )))	92	#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 )))
93	#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 )))	93	#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 )))
94		94
95	#define SET_PTL0_ADDRESS_ARCH(ptl0) (write_cr3((uintptr_t) (ptl0)))	95	#define SET_PTL0_ADDRESS_ARCH(ptl0) (write_cr3((uintptr_t) (ptl0)))
96	#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) set_pt_addr((pte_t *)(ptl0), (index_t)(i), a)	96	#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) set_pt_addr((pte_t *)(ptl0), (index_t)(i), a)
97	#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) set_pt_addr((pte_t *)(ptl1), (index_t)(i), a)	97	#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) set_pt_addr((pte_t *)(ptl1), (index_t)(i), a)
98	#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) set_pt_addr((pte_t *)(ptl2), (index_t)(i), a)	98	#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) set_pt_addr((pte_t *)(ptl2), (index_t)(i), a)
99	#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) set_pt_addr((pte_t *)(ptl3), (index_t)(i), a)	99	#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) set_pt_addr((pte_t *)(ptl3), (index_t)(i), a)
100		100
101	#define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i))	101	#define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i))
102	#define GET_PTL2_FLAGS_ARCH(ptl1, i) get_pt_flags((pte_t *)(ptl1), (index_t)(i))	102	#define GET_PTL2_FLAGS_ARCH(ptl1, i) get_pt_flags((pte_t *)(ptl1), (index_t)(i))
103	#define GET_PTL3_FLAGS_ARCH(ptl2, i) get_pt_flags((pte_t *)(ptl2), (index_t)(i))	103	#define GET_PTL3_FLAGS_ARCH(ptl2, i) get_pt_flags((pte_t *)(ptl2), (index_t)(i))
104	#define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i))	104	#define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i))
105		105
106	#define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x))	106	#define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x))
107	#define SET_PTL2_FLAGS_ARCH(ptl1, i, x) set_pt_flags((pte_t *)(ptl1), (index_t)(i), (x))	107	#define SET_PTL2_FLAGS_ARCH(ptl1, i, x) set_pt_flags((pte_t *)(ptl1), (index_t)(i), (x))
108	#define SET_PTL3_FLAGS_ARCH(ptl2, i, x) set_pt_flags((pte_t *)(ptl2), (index_t)(i), (x))	108	#define SET_PTL3_FLAGS_ARCH(ptl2, i, x) set_pt_flags((pte_t *)(ptl2), (index_t)(i), (x))
109	#define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x))	109	#define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x))
110		110
111	#define PTE_VALID_ARCH(p) (((uint64_t ) (p)) != 0)	111	#define PTE_VALID_ARCH(p) (((uint64_t ) (p)) != 0)
112	#define PTE_PRESENT_ARCH(p) ((p)->present != 0)	112	#define PTE_PRESENT_ARCH(p) ((p)->present != 0)
113	#define PTE_GET_FRAME_ARCH(p) ((((uintptr_t)(p)->addr_12_31)<<12) \| ((uintptr_t)(p)->addr_32_51<<32))	113	#define PTE_GET_FRAME_ARCH(p) ((((uintptr_t)(p)->addr_12_31)<<12) \| ((uintptr_t)(p)->addr_32_51<<32))
114	#define PTE_WRITABLE_ARCH(p) ((p)->writeable != 0)	114	#define PTE_WRITABLE_ARCH(p) ((p)->writeable != 0)
115	#define PTE_EXECUTABLE_ARCH(p) ((p)->no_execute == 0)	115	#define PTE_EXECUTABLE_ARCH(p) ((p)->no_execute == 0)
116		116
117	#ifndef __ASM__	117	#ifndef __ASM__
118		118
119	/* Page fault error codes. */	119	/* Page fault error codes. */
120		120
121	/** When bit on this position is 0, the page fault was caused by a not-present page. */	121	/** When bit on this position is 0, the page fault was caused by a not-present page. */
122	#define PFERR_CODE_P (1<<0)	122	#define PFERR_CODE_P (1<<0)
123		123
124	/** When bit on this position is 1, the page fault was caused by a write. */	124	/** When bit on this position is 1, the page fault was caused by a write. */
125	#define PFERR_CODE_RW (1<<1)	125	#define PFERR_CODE_RW (1<<1)
126		126
127	/** When bit on this position is 1, the page fault was caused in user mode. */	127	/** When bit on this position is 1, the page fault was caused in user mode. */
128	#define PFERR_CODE_US (1<<2)	128	#define PFERR_CODE_US (1<<2)
129		129
130	/** When bit on this position is 1, a reserved bit was set in page directory. */	130	/** When bit on this position is 1, a reserved bit was set in page directory. */
131	#define PFERR_CODE_RSVD (1<<3)	131	#define PFERR_CODE_RSVD (1<<3)
132		132
133	/** When bit on this position os 1, the page fault was caused during instruction fecth. */	133	/** When bit on this position os 1, the page fault was caused during instruction fecth. */
134	#define PFERR_CODE_ID (1<<4)	134	#define PFERR_CODE_ID (1<<4)
135		135
136	/** Page Table Entry. */	-
137	struct page_specifier {	-
138	unsigned present : 1;	-
139	unsigned writeable : 1;	-
140	unsigned uaccessible : 1;	-
141	unsigned page_write_through : 1;	-
142	unsigned page_cache_disable : 1;	-
143	unsigned accessed : 1;	-
144	unsigned dirty : 1;	-
145	unsigned unused: 1;	-
146	unsigned global : 1;	-
147	unsigned soft_valid : 1; /*< Valid content even if present bit is cleared. /	-
148	unsigned avl : 2;	-
149	unsigned addr_12_31 : 30;	-
150	unsigned addr_32_51 : 21;	-
151	unsigned no_execute : 1;	-
152	} __attribute__ ((packed));	-
153		-
154	static inline int get_pt_flags(pte_t *pt, index_t i)	136	static inline int get_pt_flags(pte_t *pt, index_t i)
155	{	137	{
156	pte_t *p = &pt[i];	138	pte_t *p = &pt[i];
157		139
158	return (	140	return (
159	(!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT \|	141	(!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT \|
160	(!p->present)<<PAGE_PRESENT_SHIFT \|	142	(!p->present)<<PAGE_PRESENT_SHIFT \|
161	p->uaccessible<<PAGE_USER_SHIFT \|	143	p->uaccessible<<PAGE_USER_SHIFT \|
162	1<<PAGE_READ_SHIFT \|	144	1<<PAGE_READ_SHIFT \|
163	p->writeable<<PAGE_WRITE_SHIFT \|	145	p->writeable<<PAGE_WRITE_SHIFT \|
164	(!p->no_execute)<<PAGE_EXEC_SHIFT \|	146	(!p->no_execute)<<PAGE_EXEC_SHIFT \|
165	p->global<<PAGE_GLOBAL_SHIFT	147	p->global<<PAGE_GLOBAL_SHIFT
166	);	148	);
167	}	149	}
168		150
169	static inline void set_pt_addr(pte_t *pt, index_t i, uintptr_t a)	151	static inline void set_pt_addr(pte_t *pt, index_t i, uintptr_t a)
170	{	152	{
171	pte_t *p = &pt[i];	153	pte_t *p = &pt[i];
172		154
173	p->addr_12_31 = (a >> 12) & 0xfffff;	155	p->addr_12_31 = (a >> 12) & 0xfffff;
174	p->addr_32_51 = a >> 32;	156	p->addr_32_51 = a >> 32;
175	}	157	}
176		158
177	static inline void set_pt_flags(pte_t *pt, index_t i, int flags)	159	static inline void set_pt_flags(pte_t *pt, index_t i, int flags)
178	{	160	{
179	pte_t *p = &pt[i];	161	pte_t *p = &pt[i];
180		162
181	p->page_cache_disable = !(flags & PAGE_CACHEABLE);	163	p->page_cache_disable = !(flags & PAGE_CACHEABLE);
182	p->present = !(flags & PAGE_NOT_PRESENT);	164	p->present = !(flags & PAGE_NOT_PRESENT);
183	p->uaccessible = (flags & PAGE_USER) != 0;	165	p->uaccessible = (flags & PAGE_USER) != 0;
184	p->writeable = (flags & PAGE_WRITE) != 0;	166	p->writeable = (flags & PAGE_WRITE) != 0;
185	p->no_execute = (flags & PAGE_EXEC) == 0;	167	p->no_execute = (flags & PAGE_EXEC) == 0;
186	p->global = (flags & PAGE_GLOBAL) != 0;	168	p->global = (flags & PAGE_GLOBAL) != 0;
187		169
188	/*	170	/*
189	* Ensure that there is at least one bit set even if the present bit is cleared.	171	* Ensure that there is at least one bit set even if the present bit is cleared.
190	*/	172	*/
191	p->soft_valid = 1;	173	p->soft_valid = 1;
192	}	174	}
193		175
194	extern void page_arch_init(void);	176	extern void page_arch_init(void);
195	extern void page_fault(int n, istate_t *istate);	177	extern void page_fault(int n, istate_t *istate);
196		178
197	#endif /* __ASM__ */	179	#endif /* __ASM__ */
198		180
199	#endif /* KERNEL */	181	#endif /* KERNEL */
200		182
201	#endif	183	#endif
202		184
203	/** @}	185	/** @}
204	*/	186	*/
205		187

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(root)/trunk/kernel/arch/amd64/include/mm/page.h – Rev 2071 → 2089