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.
 */
 
/** @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 __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 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)
 
/** 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, 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);
 
#endif /* __ASM__ */
 
#endif /* KERNEL */
 
#endif
 
/** @}
 */
 
 

Rev 1702	Rev 1780
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 __amd64_PAGE_H__	47	#ifndef __amd64_PAGE_H__
48	#define __amd64_PAGE_H__	48	#define __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/page.h>	58	# include <mm/page.h>
59	# include <arch/types.h>	59	# include <arch/types.h>
60	#endif	60	#endif
61		61
62	#ifndef __ASM__	62	#ifndef __ASM__
63	static inline __address ka2pa(__address x)	63	static inline uintptr_t ka2pa(uintptr_t x)
64	{	64	{
65	if (x > 0xffffffff80000000)	65	if (x > 0xffffffff80000000)
66	return x - 0xffffffff80000000;	66	return x - 0xffffffff80000000;
67	else	67	else
68	return x - 0xffff800000000000;	68	return x - 0xffff800000000000;
69	}	69	}
70	# define KA2PA(x) ka2pa((__address)x)	70	# define KA2PA(x) ka2pa((uintptr_t)x)
71	# define PA2KA_CODE(x) (((__address) (x)) + 0xffffffff80000000)	71	# define PA2KA_CODE(x) (((uintptr_t) (x)) + 0xffffffff80000000)
72	# define PA2KA(x) (((__address) (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	#define PTL0_ENTRIES_ARCH 512	78	#define PTL0_ENTRIES_ARCH 512
79	#define PTL1_ENTRIES_ARCH 512	79	#define PTL1_ENTRIES_ARCH 512
80	#define PTL2_ENTRIES_ARCH 512	80	#define PTL2_ENTRIES_ARCH 512
81	#define PTL3_ENTRIES_ARCH 512	81	#define PTL3_ENTRIES_ARCH 512
82		82
83	#define PTL0_INDEX_ARCH(vaddr) (((vaddr)>>39)&0x1ff)	83	#define PTL0_INDEX_ARCH(vaddr) (((vaddr)>>39)&0x1ff)
84	#define PTL1_INDEX_ARCH(vaddr) (((vaddr)>>30)&0x1ff)	84	#define PTL1_INDEX_ARCH(vaddr) (((vaddr)>>30)&0x1ff)
85	#define PTL2_INDEX_ARCH(vaddr) (((vaddr)>>21)&0x1ff)	85	#define PTL2_INDEX_ARCH(vaddr) (((vaddr)>>21)&0x1ff)
86	#define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>12)&0x1ff)	86	#define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>12)&0x1ff)
87		87
88	#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 )))	88	#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 )))
89	#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 )))	89	#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 )))
90	#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 )))	90	#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 )))
91	#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 )))	91	#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 )))
92		92
93	#define SET_PTL0_ADDRESS_ARCH(ptl0) (write_cr3((__address) (ptl0)))	93	#define SET_PTL0_ADDRESS_ARCH(ptl0) (write_cr3((uintptr_t) (ptl0)))
94	#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) set_pt_addr((pte_t *)(ptl0), (index_t)(i), a)	94	#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) set_pt_addr((pte_t *)(ptl0), (index_t)(i), a)
95	#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) set_pt_addr((pte_t *)(ptl1), (index_t)(i), a)	95	#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) set_pt_addr((pte_t *)(ptl1), (index_t)(i), a)
96	#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) set_pt_addr((pte_t *)(ptl2), (index_t)(i), a)	96	#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) set_pt_addr((pte_t *)(ptl2), (index_t)(i), a)
97	#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) set_pt_addr((pte_t *)(ptl3), (index_t)(i), a)	97	#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) set_pt_addr((pte_t *)(ptl3), (index_t)(i), a)
98		98
99	#define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i))	99	#define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i))
100	#define GET_PTL2_FLAGS_ARCH(ptl1, i) get_pt_flags((pte_t *)(ptl1), (index_t)(i))	100	#define GET_PTL2_FLAGS_ARCH(ptl1, i) get_pt_flags((pte_t *)(ptl1), (index_t)(i))
101	#define GET_PTL3_FLAGS_ARCH(ptl2, i) get_pt_flags((pte_t *)(ptl2), (index_t)(i))	101	#define GET_PTL3_FLAGS_ARCH(ptl2, i) get_pt_flags((pte_t *)(ptl2), (index_t)(i))
102	#define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i))	102	#define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i))
103		103
104	#define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x))	104	#define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x))
105	#define SET_PTL2_FLAGS_ARCH(ptl1, i, x) set_pt_flags((pte_t *)(ptl1), (index_t)(i), (x))	105	#define SET_PTL2_FLAGS_ARCH(ptl1, i, x) set_pt_flags((pte_t *)(ptl1), (index_t)(i), (x))
106	#define SET_PTL3_FLAGS_ARCH(ptl2, i, x) set_pt_flags((pte_t *)(ptl2), (index_t)(i), (x))	106	#define SET_PTL3_FLAGS_ARCH(ptl2, i, x) set_pt_flags((pte_t *)(ptl2), (index_t)(i), (x))
107	#define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x))	107	#define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x))
108		108
109	#define PTE_VALID_ARCH(p) (((__u64 ) (p)) != 0)	109	#define PTE_VALID_ARCH(p) (((uint64_t ) (p)) != 0)
110	#define PTE_PRESENT_ARCH(p) ((p)->present != 0)	110	#define PTE_PRESENT_ARCH(p) ((p)->present != 0)
111	#define PTE_GET_FRAME_ARCH(p) ((((__address)(p)->addr_12_31)<<12) \| ((__address)(p)->addr_32_51<<32))	111	#define PTE_GET_FRAME_ARCH(p) ((((uintptr_t)(p)->addr_12_31)<<12) \| ((uintptr_t)(p)->addr_32_51<<32))
112	#define PTE_WRITABLE_ARCH(p) ((p)->writeable != 0)	112	#define PTE_WRITABLE_ARCH(p) ((p)->writeable != 0)
113	#define PTE_EXECUTABLE_ARCH(p) ((p)->no_execute == 0)	113	#define PTE_EXECUTABLE_ARCH(p) ((p)->no_execute == 0)
114		114
115	#ifndef __ASM__	115	#ifndef __ASM__
116		116
117	/* Page fault error codes. */	117	/* Page fault error codes. */
118		118
119	/** When bit on this position is 0, the page fault was caused by a not-present page. */	119	/** When bit on this position is 0, the page fault was caused by a not-present page. */
120	#define PFERR_CODE_P (1<<0)	120	#define PFERR_CODE_P (1<<0)
121		121
122	/** When bit on this position is 1, the page fault was caused by a write. */	122	/** When bit on this position is 1, the page fault was caused by a write. */
123	#define PFERR_CODE_RW (1<<1)	123	#define PFERR_CODE_RW (1<<1)
124		124
125	/** When bit on this position is 1, the page fault was caused in user mode. */	125	/** When bit on this position is 1, the page fault was caused in user mode. */
126	#define PFERR_CODE_US (1<<2)	126	#define PFERR_CODE_US (1<<2)
127		127
128	/** When bit on this position is 1, a reserved bit was set in page directory. */	128	/** When bit on this position is 1, a reserved bit was set in page directory. */
129	#define PFERR_CODE_RSVD (1<<3)	129	#define PFERR_CODE_RSVD (1<<3)
130		130
131	/** When bit on this position os 1, the page fault was caused during instruction fecth. */	131	/** When bit on this position os 1, the page fault was caused during instruction fecth. */
132	#define PFERR_CODE_ID (1<<4)	132	#define PFERR_CODE_ID (1<<4)
133		133
134	/** Page Table Entry. */	134	/** Page Table Entry. */
135	struct page_specifier {	135	struct page_specifier {
136	unsigned present : 1;	136	unsigned present : 1;
137	unsigned writeable : 1;	137	unsigned writeable : 1;
138	unsigned uaccessible : 1;	138	unsigned uaccessible : 1;
139	unsigned page_write_through : 1;	139	unsigned page_write_through : 1;
140	unsigned page_cache_disable : 1;	140	unsigned page_cache_disable : 1;
141	unsigned accessed : 1;	141	unsigned accessed : 1;
142	unsigned dirty : 1;	142	unsigned dirty : 1;
143	unsigned unused: 1;	143	unsigned unused: 1;
144	unsigned global : 1;	144	unsigned global : 1;
145	unsigned soft_valid : 1; /*< Valid content even if present bit is cleared. /	145	unsigned soft_valid : 1; /*< Valid content even if present bit is cleared. /
146	unsigned avl : 2;	146	unsigned avl : 2;
147	unsigned addr_12_31 : 30;	147	unsigned addr_12_31 : 30;
148	unsigned addr_32_51 : 21;	148	unsigned addr_32_51 : 21;
149	unsigned no_execute : 1;	149	unsigned no_execute : 1;
150	} __attribute__ ((packed));	150	} __attribute__ ((packed));
151		151
152	static inline int get_pt_flags(pte_t *pt, index_t i)	152	static inline int get_pt_flags(pte_t *pt, index_t i)
153	{	153	{
154	pte_t *p = &pt[i];	154	pte_t *p = &pt[i];
155		155
156	return (	156	return (
157	(!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT \|	157	(!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT \|
158	(!p->present)<<PAGE_PRESENT_SHIFT \|	158	(!p->present)<<PAGE_PRESENT_SHIFT \|
159	p->uaccessible<<PAGE_USER_SHIFT \|	159	p->uaccessible<<PAGE_USER_SHIFT \|
160	1<<PAGE_READ_SHIFT \|	160	1<<PAGE_READ_SHIFT \|
161	p->writeable<<PAGE_WRITE_SHIFT \|	161	p->writeable<<PAGE_WRITE_SHIFT \|
162	(!p->no_execute)<<PAGE_EXEC_SHIFT \|	162	(!p->no_execute)<<PAGE_EXEC_SHIFT \|
163	p->global<<PAGE_GLOBAL_SHIFT	163	p->global<<PAGE_GLOBAL_SHIFT
164	);	164	);
165	}	165	}
166		166
167	static inline void set_pt_addr(pte_t *pt, index_t i, __address a)	167	static inline void set_pt_addr(pte_t *pt, index_t i, uintptr_t a)
168	{	168	{
169	pte_t *p = &pt[i];	169	pte_t *p = &pt[i];
170		170
171	p->addr_12_31 = (a >> 12) & 0xfffff;	171	p->addr_12_31 = (a >> 12) & 0xfffff;
172	p->addr_32_51 = a >> 32;	172	p->addr_32_51 = a >> 32;
173	}	173	}
174		174
175	static inline void set_pt_flags(pte_t *pt, index_t i, int flags)	175	static inline void set_pt_flags(pte_t *pt, index_t i, int flags)
176	{	176	{
177	pte_t *p = &pt[i];	177	pte_t *p = &pt[i];
178		178
179	p->page_cache_disable = !(flags & PAGE_CACHEABLE);	179	p->page_cache_disable = !(flags & PAGE_CACHEABLE);
180	p->present = !(flags & PAGE_NOT_PRESENT);	180	p->present = !(flags & PAGE_NOT_PRESENT);
181	p->uaccessible = (flags & PAGE_USER) != 0;	181	p->uaccessible = (flags & PAGE_USER) != 0;
182	p->writeable = (flags & PAGE_WRITE) != 0;	182	p->writeable = (flags & PAGE_WRITE) != 0;
183	p->no_execute = (flags & PAGE_EXEC) == 0;	183	p->no_execute = (flags & PAGE_EXEC) == 0;
184	p->global = (flags & PAGE_GLOBAL) != 0;	184	p->global = (flags & PAGE_GLOBAL) != 0;
185		185
186	/*	186	/*
187	* Ensure that there is at least one bit set even if the present bit is cleared.	187	* Ensure that there is at least one bit set even if the present bit is cleared.
188	*/	188	*/
189	p->soft_valid = 1;	189	p->soft_valid = 1;
190	}	190	}
191		191
192	extern void page_arch_init(void);	192	extern void page_arch_init(void);
193		193
194	#endif /* __ASM__ */	194	#endif /* __ASM__ */
195		195
196	#endif /* KERNEL */	196	#endif /* KERNEL */
197		197
198	#endif	198	#endif
199		199
200	/** @}	200	/** @}
201	*/	201	*/
202		-
203		202

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/amd64/include/mm/page.h – Rev 1702 → 1780