WebSVN – HelenOS – Blame – //trunk/kernel/arch/mips32/include/mm/tlb.h

Rev	Author	Line No.	Line
1	jermar	1	/*
319	jermar	2	* Copyright (C) 2003-2004 Jakub Jermar
1	jermar	3	* All rights reserved.
		4	*
		5	* Redistribution and use in source and binary forms, with or without
		6	* modification, are permitted provided that the following conditions
		7	* are met:
		8	*
		9	* - Redistributions of source code must retain the above copyright
		10	* notice, this list of conditions and the following disclaimer.
		11	* - Redistributions in binary form must reproduce the above copyright
		12	* notice, this list of conditions and the following disclaimer in the
		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
		15	* derived from this software without specific prior written permission.
		16	*
		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
		19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
		20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
		21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
		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
		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
		26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		27	*/
		28
1769	jermar	29	/** @addtogroup mips32mm
1702	cejka	30	* @{
		31	*/
		32	/** @file
		33	*/
		34
1888	jermar	35	#ifndef KERN_mips32_TLB_H_
		36	#define KERN_mips32_TLB_H_
1	jermar	37
317	palkovsky	38	#include <arch/exception.h>
403	jermar	39	#include <typedefs.h>
317	palkovsky	40
600	jermar	41	#ifdef TLBCNT
		42	# define TLB_ENTRY_COUNT TLBCNT
		43	#else
		44	# define TLB_ENTRY_COUNT 48
		45	#endif
389	jermar	46
		47	#define TLB_WIRED 1
		48	#define TLB_KSTACK_WIRED_INDEX 0
		49
		50	#define TLB_PAGE_MASK_16K (0x3<<13)
		51
121	jermar	52	#define PAGE_UNCACHED 2
		53	#define PAGE_CACHEABLE_EXC_WRITE 5
		54
403	jermar	55	typedef union entry_lo entry_lo_t;
		56	typedef union entry_hi entry_hi_t;
		57	typedef union page_mask page_mask_t;
		58	typedef union index tlb_index_t;
		59
396	jermar	60	union entry_lo {
		61	struct {
849	palkovsky	62	#ifdef BIG_ENDIAN
		63	unsigned : 2; /* zero */
		64	unsigned pfn : 24; /* frame number */
		65	unsigned c : 3; /* cache coherency attribute */
		66	unsigned d : 1; /* dirty/write-protect bit */
		67	unsigned v : 1; /* valid bit */
396	jermar	68	unsigned g : 1; /* global bit */
849	palkovsky	69	#else
		70	unsigned g : 1; /* global bit */
396	jermar	71	unsigned v : 1; /* valid bit */
		72	unsigned d : 1; /* dirty/write-protect bit */
		73	unsigned c : 3; /* cache coherency attribute */
		74	unsigned pfn : 24; /* frame number */
399	jermar	75	unsigned : 2; /* zero */
849	palkovsky	76	#endif
396	jermar	77	} __attribute__ ((packed));
1780	jermar	78	uint32_t value;
396	jermar	79	};
1	jermar	80
831	jermar	81	/** Page Table Entry. */
		82	struct pte {
		83	unsigned g : 1; /*< Global bit. /
		84	unsigned p : 1; /*< Present bit. /
		85	unsigned d : 1; /*< Dirty bit. /
		86	unsigned cacheable : 1; /*< Cacheable bit. /
		87	unsigned : 1; /*< Unused. /
		88	unsigned soft_valid : 1; /*< Valid content even if not present. /
		89	unsigned pfn : 24; /*< Physical frame number. /
		90	unsigned w : 1; /*< Page writable bit. /
		91	unsigned a : 1; /*< Accessed bit. /
403	jermar	92	};
394	jermar	93
396	jermar	94	union entry_hi {
		95	struct {
849	palkovsky	96	#ifdef BIG_ENDIAN
		97	unsigned vpn2 : 19;
		98	unsigned : 5;
396	jermar	99	unsigned asid : 8;
849	palkovsky	100	#else
		101	unsigned asid : 8;
396	jermar	102	unsigned : 5;
		103	unsigned vpn2 : 19;
849	palkovsky	104	#endif
396	jermar	105	} __attribute__ ((packed));
1780	jermar	106	uint32_t value;
396	jermar	107	};
1	jermar	108
396	jermar	109	union page_mask {
		110	struct {
849	palkovsky	111	#ifdef BIG_ENDIAN
		112	unsigned : 7;
		113	unsigned mask : 12;
396	jermar	114	unsigned : 13;
849	palkovsky	115	#else
		116	unsigned : 13;
396	jermar	117	unsigned mask : 12;
		118	unsigned : 7;
849	palkovsky	119	#endif
396	jermar	120	} __attribute__ ((packed));
1780	jermar	121	uint32_t value;
396	jermar	122	};
1	jermar	123
396	jermar	124	union index {
		125	struct {
849	palkovsky	126	#ifdef BIG_ENDIAN
		127	unsigned p : 1;
		128	unsigned : 27;
396	jermar	129	unsigned index : 4;
849	palkovsky	130	#else
		131	unsigned index : 4;
396	jermar	132	unsigned : 27;
		133	unsigned p : 1;
849	palkovsky	134	#endif
396	jermar	135	} __attribute__ ((packed));
1780	jermar	136	uint32_t value;
396	jermar	137	};
1	jermar	138
394	jermar	139	/** Probe TLB for Matching Entry
		140	*
		141	* Probe TLB for Matching Entry.
		142	*/
		143	static inline void tlbp(void)
		144	{
		145	__asm__ volatile ("tlbp\n\t");
		146	}
121	jermar	147
394	jermar	148
389	jermar	149	/** Read Indexed TLB Entry
		150	*
		151	* Read Indexed TLB Entry.
		152	*/
		153	static inline void tlbr(void)
		154	{
		155	__asm__ volatile ("tlbr\n\t");
		156	}
		157
		158	/** Write Indexed TLB Entry
		159	*
		160	* Write Indexed TLB Entry.
		161	*/
		162	static inline void tlbwi(void)
		163	{
		164	__asm__ volatile ("tlbwi\n\t");
		165	}
		166
		167	/** Write Random TLB Entry
		168	*
		169	* Write Random TLB Entry.
		170	*/
		171	static inline void tlbwr(void)
		172	{
		173	__asm__ volatile ("tlbwr\n\t");
		174	}
		175
599	jermar	176	#define tlb_invalidate(asid) tlb_invalidate_asid(asid)
		177
958	jermar	178	extern void tlb_invalid(istate_t *istate);
		179	extern void tlb_refill(istate_t *istate);
		180	extern void tlb_modified(istate_t *istate);
1	jermar	181
		182	#endif
1702	cejka	183
1769	jermar	184	/** @}
1702	cejka	185	*/

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