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 {
        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 */
    } __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 {
        unsigned asid : 8;
        unsigned : 5;
        unsigned vpn2 : 19;
    } __attribute__ ((packed));
    __u32 value;
};
 
union page_mask {
    struct {
        unsigned : 13;
        unsigned mask : 12;
        unsigned : 7;
    } __attribute__ ((packed));
    __u32 value;
};
 
union index {
    struct {
        unsigned index : 4;
        unsigned : 27;
        unsigned p : 1;
    } __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(struct exception_regdump *pstate);
extern void tlb_refill(struct exception_regdump *pstate);
extern void tlb_modified(struct exception_regdump *pstate);
 
#endif
 

Rev 600	Rev 831
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	unsigned g : 1; /* global bit */	56	unsigned g : 1; /* global bit */
57	unsigned v : 1; /* valid bit */	57	unsigned v : 1; /* valid bit */
58	unsigned d : 1; /* dirty/write-protect bit */	58	unsigned d : 1; /* dirty/write-protect bit */
59	unsigned c : 3; /* cache coherency attribute */	59	unsigned c : 3; /* cache coherency attribute */
60	unsigned pfn : 24; /* frame number */	60	unsigned pfn : 24; /* frame number */
61	unsigned : 2; /* zero */	61	unsigned : 2; /* zero */
62	} __attribute__ ((packed));	62	} __attribute__ ((packed));
63	__u32 value;	63	__u32 value;
64	};	64	};
65		65
66	union pte {	-
67	entry_lo_t lo;	66	/** Page Table Entry. */
68	struct {	67	struct pte {
69	unsigned : 30;	68	unsigned g : 1; /*< Global bit. /
-		69	unsigned p : 1; /*< Present bit. /
70	unsigned w : 1; /* writable */	70	unsigned d : 1; /*< Dirty bit. /
-		71	unsigned cacheable : 1; /*< Cacheable bit. /
71	unsigned a : 1; /* accessed */	72	unsigned : 1; /*< Unused. /
-		73	unsigned soft_valid : 1; /*< Valid content even if not present. /
-		74	unsigned pfn : 24; /*< Physical frame number. /
-		75	unsigned w : 1; /*< Page writable bit. /
72	} __attribute__ ((packed));	76	unsigned a : 1; /*< Accessed bit. /
73	};	77	};
74		78
75	union entry_hi {	79	union entry_hi {
76	struct {	80	struct {
77	unsigned asid : 8;	81	unsigned asid : 8;
78	unsigned : 5;	82	unsigned : 5;
79	unsigned vpn2 : 19;	83	unsigned vpn2 : 19;
80	} __attribute__ ((packed));	84	} __attribute__ ((packed));
81	__u32 value;	85	__u32 value;
82	};	86	};
83		87
84	union page_mask {	88	union page_mask {
85	struct {	89	struct {
86	unsigned : 13;	90	unsigned : 13;
87	unsigned mask : 12;	91	unsigned mask : 12;
88	unsigned : 7;	92	unsigned : 7;
89	} __attribute__ ((packed));	93	} __attribute__ ((packed));
90	__u32 value;	94	__u32 value;
91	};	95	};
92		96
93	union index {	97	union index {
94	struct {	98	struct {
95	unsigned index : 4;	99	unsigned index : 4;
96	unsigned : 27;	100	unsigned : 27;
97	unsigned p : 1;	101	unsigned p : 1;
98	} __attribute__ ((packed));	102	} __attribute__ ((packed));
99	__u32 value;	103	__u32 value;
100	};	104	};
101		105
102	/** Probe TLB for Matching Entry	106	/** Probe TLB for Matching Entry
103	*	107	*
104	* Probe TLB for Matching Entry.	108	* Probe TLB for Matching Entry.
105	*/	109	*/
106	static inline void tlbp(void)	110	static inline void tlbp(void)
107	{	111	{
108	__asm__ volatile ("tlbp\n\t");	112	__asm__ volatile ("tlbp\n\t");
109	}	113	}
110		114
111		115
112	/** Read Indexed TLB Entry	116	/** Read Indexed TLB Entry
113	*	117	*
114	* Read Indexed TLB Entry.	118	* Read Indexed TLB Entry.
115	*/	119	*/
116	static inline void tlbr(void)	120	static inline void tlbr(void)
117	{	121	{
118	__asm__ volatile ("tlbr\n\t");	122	__asm__ volatile ("tlbr\n\t");
119	}	123	}
120		124
121	/** Write Indexed TLB Entry	125	/** Write Indexed TLB Entry
122	*	126	*
123	* Write Indexed TLB Entry.	127	* Write Indexed TLB Entry.
124	*/	128	*/
125	static inline void tlbwi(void)	129	static inline void tlbwi(void)
126	{	130	{
127	__asm__ volatile ("tlbwi\n\t");	131	__asm__ volatile ("tlbwi\n\t");
128	}	132	}
129		133
130	/** Write Random TLB Entry	134	/** Write Random TLB Entry
131	*	135	*
132	* Write Random TLB Entry.	136	* Write Random TLB Entry.
133	*/	137	*/
134	static inline void tlbwr(void)	138	static inline void tlbwr(void)
135	{	139	{
136	__asm__ volatile ("tlbwr\n\t");	140	__asm__ volatile ("tlbwr\n\t");
137	}	141	}
138		142
139	#define tlb_invalidate(asid) tlb_invalidate_asid(asid)	143	#define tlb_invalidate(asid) tlb_invalidate_asid(asid)
140		144
141	extern void tlb_invalid(struct exception_regdump *pstate);	145	extern void tlb_invalid(struct exception_regdump *pstate);
142	extern void tlb_refill(struct exception_regdump *pstate);	146	extern void tlb_refill(struct exception_regdump *pstate);
143	extern void tlb_modified(struct exception_regdump *pstate);	147	extern void tlb_modified(struct exception_regdump *pstate);
144		148
145	#endif	149	#endif
146		150

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/mips32/include/mm/tlb.h – Rev 600 → 831