WebSVN – HelenOS-historic – Diff – /kernel/trunk/arch/mips32/include/mm/tlb.h


/*
 * Copyright (C) 2003-2004 Jakub Jermar
 * 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 __mips32_TLB_H__
#define __mips32_TLB_H__
 
#include <arch/exception.h>
#include <typedefs.h>
 
#ifdef TLBCNT
#   define TLB_ENTRY_COUNT      TLBCNT
#else
#   define TLB_ENTRY_COUNT      48
#endif
 
#define TLB_WIRED       1
#define TLB_KSTACK_WIRED_INDEX  0
 
#define TLB_PAGE_MASK_16K   (0x3<<13)
 
#define PAGE_UNCACHED           2
#define PAGE_CACHEABLE_EXC_WRITE    5
 
typedef union entry_lo entry_lo_t;
typedef union entry_hi entry_hi_t;
typedef union page_mask page_mask_t;
typedef union index tlb_index_t;
 
union entry_lo {
    struct {
#ifdef BIG_ENDIAN
        unsigned : 2;       /* zero */
        unsigned pfn : 24;  /* frame number */
        unsigned c : 3;     /* cache coherency attribute */
        unsigned d : 1;     /* dirty/write-protect bit */
        unsigned v : 1;     /* valid bit */
        unsigned g : 1;     /* global bit */
#else
        unsigned g : 1;     /* global bit */
        unsigned v : 1;     /* valid bit */
        unsigned d : 1;     /* dirty/write-protect bit */
        unsigned c : 3;     /* cache coherency attribute */
        unsigned pfn : 24;  /* frame number */
        unsigned : 2;       /* zero */
#endif
    } __attribute__ ((packed));
    __u32 value;
};
 
/** Page Table Entry. */
struct pte {
    unsigned g : 1;         /**< Global bit. */
    unsigned p : 1;         /**< Present bit. */
    unsigned d : 1;         /**< Dirty bit. */
    unsigned cacheable : 1;     /**< Cacheable bit. */
    unsigned : 1;           /**< Unused. */
    unsigned soft_valid : 1;    /**< Valid content even if not present. */
    unsigned pfn : 24;      /**< Physical frame number. */
    unsigned w : 1;         /**< Page writable bit. */
    unsigned a : 1;         /**< Accessed bit. */
};
 
union entry_hi {
    struct {
#ifdef BIG_ENDIAN
        unsigned vpn2 : 19;
        unsigned : 5;
        unsigned asid : 8;
#else
        unsigned asid : 8;
        unsigned : 5;
        unsigned vpn2 : 19;
#endif
    } __attribute__ ((packed));
    __u32 value;
};
 
union page_mask {
    struct {
#ifdef BIG_ENDIAN
        unsigned : 7;
        unsigned mask : 12;
        unsigned : 13;
#else
        unsigned : 13;
        unsigned mask : 12;
        unsigned : 7;
#endif
    } __attribute__ ((packed));
    __u32 value;
};
 
union index {
    struct {
#ifdef BIG_ENDIAN
        unsigned p : 1;
        unsigned : 27;
        unsigned index : 4;
#else
        unsigned index : 4;
        unsigned : 27;
        unsigned p : 1;
#endif
    } __attribute__ ((packed));
    __u32 value;
};
 
/** Probe TLB for Matching Entry
 *
 * Probe TLB for Matching Entry.
 */
static inline void tlbp(void)
{
    __asm__ volatile ("tlbp\n\t");
}
 
 
/** Read Indexed TLB Entry
 *
 * Read Indexed TLB Entry.
 */
static inline void tlbr(void)
{
    __asm__ volatile ("tlbr\n\t");
}
 
/** Write Indexed TLB Entry
 *
 * Write Indexed TLB Entry.
 */
static inline void tlbwi(void)
{
    __asm__ volatile ("tlbwi\n\t");
}
 
/** Write Random TLB Entry
 *
 * Write Random TLB Entry.
 */
static inline void tlbwr(void)
{
    __asm__ volatile ("tlbwr\n\t");
}
 
#define tlb_invalidate(asid)    tlb_invalidate_asid(asid)
 
extern void tlb_invalid(istate_t *istate);
extern void tlb_refill(istate_t *istate);
extern void tlb_modified(istate_t *istate);
 
#endif
 

Rev 852	Rev 958
1	/*	1	/*
2	* Copyright (C) 2003-2004 Jakub Jermar	2	* Copyright (C) 2003-2004 Jakub Jermar
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 __mips32_TLB_H__	29	#ifndef __mips32_TLB_H__
30	#define __mips32_TLB_H__	30	#define __mips32_TLB_H__
31		31
32	#include <arch/exception.h>	32	#include <arch/exception.h>
33	#include <typedefs.h>	33	#include <typedefs.h>
34		34
35	#ifdef TLBCNT	35	#ifdef TLBCNT
36	# define TLB_ENTRY_COUNT TLBCNT	36	# define TLB_ENTRY_COUNT TLBCNT
37	#else	37	#else
38	# define TLB_ENTRY_COUNT 48	38	# define TLB_ENTRY_COUNT 48
39	#endif	39	#endif
40		40
41	#define TLB_WIRED 1	41	#define TLB_WIRED 1
42	#define TLB_KSTACK_WIRED_INDEX 0	42	#define TLB_KSTACK_WIRED_INDEX 0
43		43
44	#define TLB_PAGE_MASK_16K (0x3<<13)	44	#define TLB_PAGE_MASK_16K (0x3<<13)
45		45
46	#define PAGE_UNCACHED 2	46	#define PAGE_UNCACHED 2
47	#define PAGE_CACHEABLE_EXC_WRITE 5	47	#define PAGE_CACHEABLE_EXC_WRITE 5
48		48
49	typedef union entry_lo entry_lo_t;	49	typedef union entry_lo entry_lo_t;
50	typedef union entry_hi entry_hi_t;	50	typedef union entry_hi entry_hi_t;
51	typedef union page_mask page_mask_t;	51	typedef union page_mask page_mask_t;
52	typedef union index tlb_index_t;	52	typedef union index tlb_index_t;
53		53
54	union entry_lo {	54	union entry_lo {
55	struct {	55	struct {
56	#ifdef BIG_ENDIAN	56	#ifdef BIG_ENDIAN
57	unsigned : 2; /* zero */	57	unsigned : 2; /* zero */
58	unsigned pfn : 24; /* frame number */	58	unsigned pfn : 24; /* frame number */
59	unsigned c : 3; /* cache coherency attribute */	59	unsigned c : 3; /* cache coherency attribute */
60	unsigned d : 1; /* dirty/write-protect bit */	60	unsigned d : 1; /* dirty/write-protect bit */
61	unsigned v : 1; /* valid bit */	61	unsigned v : 1; /* valid bit */
62	unsigned g : 1; /* global bit */	62	unsigned g : 1; /* global bit */
63	#else	63	#else
64	unsigned g : 1; /* global bit */	64	unsigned g : 1; /* global bit */
65	unsigned v : 1; /* valid bit */	65	unsigned v : 1; /* valid bit */
66	unsigned d : 1; /* dirty/write-protect bit */	66	unsigned d : 1; /* dirty/write-protect bit */
67	unsigned c : 3; /* cache coherency attribute */	67	unsigned c : 3; /* cache coherency attribute */
68	unsigned pfn : 24; /* frame number */	68	unsigned pfn : 24; /* frame number */
69	unsigned : 2; /* zero */	69	unsigned : 2; /* zero */
70	#endif	70	#endif
71	} __attribute__ ((packed));	71	} __attribute__ ((packed));
72	__u32 value;	72	__u32 value;
73	};	73	};
74		74
75	/** Page Table Entry. */	75	/** Page Table Entry. */
76	struct pte {	76	struct pte {
77	unsigned g : 1; /*< Global bit. /	77	unsigned g : 1; /*< Global bit. /
78	unsigned p : 1; /*< Present bit. /	78	unsigned p : 1; /*< Present bit. /
79	unsigned d : 1; /*< Dirty bit. /	79	unsigned d : 1; /*< Dirty bit. /
80	unsigned cacheable : 1; /*< Cacheable bit. /	80	unsigned cacheable : 1; /*< Cacheable bit. /
81	unsigned : 1; /*< Unused. /	81	unsigned : 1; /*< Unused. /
82	unsigned soft_valid : 1; /*< Valid content even if not present. /	82	unsigned soft_valid : 1; /*< Valid content even if not present. /
83	unsigned pfn : 24; /*< Physical frame number. /	83	unsigned pfn : 24; /*< Physical frame number. /
84	unsigned w : 1; /*< Page writable bit. /	84	unsigned w : 1; /*< Page writable bit. /
85	unsigned a : 1; /*< Accessed bit. /	85	unsigned a : 1; /*< Accessed bit. /
86	};	86	};
87		87
88	union entry_hi {	88	union entry_hi {
89	struct {	89	struct {
90	#ifdef BIG_ENDIAN	90	#ifdef BIG_ENDIAN
91	unsigned vpn2 : 19;	91	unsigned vpn2 : 19;
92	unsigned : 5;	92	unsigned : 5;
93	unsigned asid : 8;	93	unsigned asid : 8;
94	#else	94	#else
95	unsigned asid : 8;	95	unsigned asid : 8;
96	unsigned : 5;	96	unsigned : 5;
97	unsigned vpn2 : 19;	97	unsigned vpn2 : 19;
98	#endif	98	#endif
99	} __attribute__ ((packed));	99	} __attribute__ ((packed));
100	__u32 value;	100	__u32 value;
101	};	101	};
102		102
103	union page_mask {	103	union page_mask {
104	struct {	104	struct {
105	#ifdef BIG_ENDIAN	105	#ifdef BIG_ENDIAN
106	unsigned : 7;	106	unsigned : 7;
107	unsigned mask : 12;	107	unsigned mask : 12;
108	unsigned : 13;	108	unsigned : 13;
109	#else	109	#else
110	unsigned : 13;	110	unsigned : 13;
111	unsigned mask : 12;	111	unsigned mask : 12;
112	unsigned : 7;	112	unsigned : 7;
113	#endif	113	#endif
114	} __attribute__ ((packed));	114	} __attribute__ ((packed));
115	__u32 value;	115	__u32 value;
116	};	116	};
117		117
118	union index {	118	union index {
119	struct {	119	struct {
120	#ifdef BIG_ENDIAN	120	#ifdef BIG_ENDIAN
121	unsigned p : 1;	121	unsigned p : 1;
122	unsigned : 27;	122	unsigned : 27;
123	unsigned index : 4;	123	unsigned index : 4;
124	#else	124	#else
125	unsigned index : 4;	125	unsigned index : 4;
126	unsigned : 27;	126	unsigned : 27;
127	unsigned p : 1;	127	unsigned p : 1;
128	#endif	128	#endif
129	} __attribute__ ((packed));	129	} __attribute__ ((packed));
130	__u32 value;	130	__u32 value;
131	};	131	};
132		132
133	/** Probe TLB for Matching Entry	133	/** Probe TLB for Matching Entry
134	*	134	*
135	* Probe TLB for Matching Entry.	135	* Probe TLB for Matching Entry.
136	*/	136	*/
137	static inline void tlbp(void)	137	static inline void tlbp(void)
138	{	138	{
139	__asm__ volatile ("tlbp\n\t");	139	__asm__ volatile ("tlbp\n\t");
140	}	140	}
141		141
142		142
143	/** Read Indexed TLB Entry	143	/** Read Indexed TLB Entry
144	*	144	*
145	* Read Indexed TLB Entry.	145	* Read Indexed TLB Entry.
146	*/	146	*/
147	static inline void tlbr(void)	147	static inline void tlbr(void)
148	{	148	{
149	__asm__ volatile ("tlbr\n\t");	149	__asm__ volatile ("tlbr\n\t");
150	}	150	}
151		151
152	/** Write Indexed TLB Entry	152	/** Write Indexed TLB Entry
153	*	153	*
154	* Write Indexed TLB Entry.	154	* Write Indexed TLB Entry.
155	*/	155	*/
156	static inline void tlbwi(void)	156	static inline void tlbwi(void)
157	{	157	{
158	__asm__ volatile ("tlbwi\n\t");	158	__asm__ volatile ("tlbwi\n\t");
159	}	159	}
160		160
161	/** Write Random TLB Entry	161	/** Write Random TLB Entry
162	*	162	*
163	* Write Random TLB Entry.	163	* Write Random TLB Entry.
164	*/	164	*/
165	static inline void tlbwr(void)	165	static inline void tlbwr(void)
166	{	166	{
167	__asm__ volatile ("tlbwr\n\t");	167	__asm__ volatile ("tlbwr\n\t");
168	}	168	}
169		169
170	#define tlb_invalidate(asid) tlb_invalidate_asid(asid)	170	#define tlb_invalidate(asid) tlb_invalidate_asid(asid)
171		171
172	extern void tlb_invalid(struct exception_regdump *pstate);	172	extern void tlb_invalid(istate_t *istate);
173	extern void tlb_refill(struct exception_regdump *pstate);	173	extern void tlb_refill(istate_t *istate);
174	extern void tlb_modified(struct exception_regdump *pstate);	174	extern void tlb_modified(istate_t *istate);
175		175
176	#endif	176	#endif
177		177

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(root)/kernel/trunk/arch/mips32/include/mm/tlb.h @ 1769 – Rev 852 → 958