WebSVN – HelenOS – Diff – /trunk/kernel/arch/sparc64/src/mm/tsb.c


/*
 * Copyright (C) 2006 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.
 */
 
/** @addtogroup sparc64mm  
 * @{
 */
/** @file
 */
 
#include <arch/mm/tsb.h>
#include <arch/mm/tlb.h>
#include <arch/barrier.h>
#include <mm/as.h>
#include <arch/types.h>
#include <typedefs.h>
#include <macros.h>
#include <debug.h>
 
#define TSB_INDEX_MASK      ((1<<(21+1+TSB_SIZE-PAGE_WIDTH))-1)
 
/** Invalidate portion of TSB.
 *
 * We assume that the address space is already locked.
 * Note that respective portions of both TSBs
 * are invalidated at a time.
 *
 * @param as Address space.
 * @param page First page to invalidate in TSB.
 * @param pages Number of pages to invalidate.
 *      Value of (count_t) -1 means the whole TSB.
 */
void tsb_invalidate(as_t *as, uintptr_t page, count_t pages)
{
    index_t i0, i;
    count_t cnt;
   
    ASSERT(as->arch.itsb && as->arch.dtsb);
   
    i0 = (page >> PAGE_WIDTH) & TSB_INDEX_MASK;
    cnt = min(pages, ITSB_ENTRY_COUNT);
   
    for (i = 0; i < cnt; i++) {
        as->arch.itsb[(i0 + i) & (ITSB_ENTRY_COUNT-1)].tag.invalid = true;
        as->arch.dtsb[(i0 + i) & (DTSB_ENTRY_COUNT-1)].tag.invalid = true;
    }
}
 
/** Copy software PTE to ITSB.
 *
 * @param t Software PTE.
 */
void itsb_pte_copy(pte_t *t)
{
    as_t *as;
    tsb_entry_t *tsb;
   
    as = t->as;
    tsb = &as->arch.itsb[(t->page >> PAGE_WIDTH) & TSB_INDEX_MASK];
 
    /*
     * We use write barriers to make sure that the TSB load
     * won't use inconsistent data or that the fault will
     * be repeated.
     */
 
    tsb->tag.invalid = true;    /* invalidate the entry
                     * (tag target has this
                     * set to 0) */
 
    write_barrier();
 
    tsb->tag.context = as->asid;
    tsb->tag.va_tag = t->page >> VA_TAG_PAGE_SHIFT;
    tsb->data.value = 0;
    tsb->data.size = PAGESIZE_8K;
    tsb->data.pfn = t->frame >> PAGE_WIDTH;
    tsb->data.cp = t->c;
    tsb->data.cv = t->c;
    tsb->data.p = t->k;     /* p as privileged */
    tsb->data.v = t->p;
   
    write_barrier();
   
    tsb->tag.invalid = false;   /* mark the entry as valid */
}
 
/** Copy software PTE to DTSB.
 *
 * @param t Software PTE.
 * @param ro If true, the mapping is copied read-only.
 */
void dtsb_pte_copy(pte_t *t, bool ro)
{
    as_t *as;
    tsb_entry_t *tsb;
   
    as = t->as;
    tsb = &as->arch.dtsb[(t->page >> PAGE_WIDTH) & TSB_INDEX_MASK];
 
    /*
     * We use write barriers to make sure that the TSB load
     * won't use inconsistent data or that the fault will
     * be repeated.
     */
 
    tsb->tag.invalid = true;    /* invalidate the entry
                     * (tag target has this
                     * set to 0) */
 
    write_barrier();
 
    tsb->tag.context = as->asid;
    tsb->tag.va_tag = t->page >> VA_TAG_PAGE_SHIFT;
    tsb->data.value = 0;
    tsb->data.size = PAGESIZE_8K;
    tsb->data.pfn = t->frame >> PAGE_WIDTH;
    tsb->data.cp = t->c;
    tsb->data.cv = t->c;
    tsb->data.p = t->k;     /* p as privileged */
    tsb->data.w = ro ? false : t->w;
    tsb->data.v = t->p;
   
    write_barrier();
   
    tsb->tag.invalid = true;    /* mark the entry as valid */
}
 
/** @}
 */
 

Rev 1917	Rev 1960
1	/*	1	/*
2	* Copyright (C) 2006 Jakub Jermar	2	* Copyright (C) 2006 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	/** @addtogroup sparc64mm	29	/** @addtogroup sparc64mm
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#include <arch/mm/tsb.h>	35	#include <arch/mm/tsb.h>
36	#include <arch/mm/tlb.h>	36	#include <arch/mm/tlb.h>
37	#include <arch/barrier.h>	37	#include <arch/barrier.h>
38	#include <mm/as.h>	38	#include <mm/as.h>
39	#include <arch/types.h>	39	#include <arch/types.h>
40	#include <typedefs.h>	40	#include <typedefs.h>
41	#include <macros.h>	41	#include <macros.h>
42	#include <debug.h>	42	#include <debug.h>
43		43
44	#define TSB_INDEX_MASK ((1<<(21+1+TSB_SIZE-PAGE_WIDTH))-1)	44	#define TSB_INDEX_MASK ((1<<(21+1+TSB_SIZE-PAGE_WIDTH))-1)
45		45
46	/** Invalidate portion of TSB.	46	/** Invalidate portion of TSB.
47	*	47	*
48	* We assume that the address space is already locked.	48	* We assume that the address space is already locked.
49	* Note that respective portions of both TSBs	49	* Note that respective portions of both TSBs
50	* are invalidated at a time.	50	* are invalidated at a time.
51	*	51	*
52	* @param as Address space.	52	* @param as Address space.
53	* @param page First page to invalidate in TSB.	53	* @param page First page to invalidate in TSB.
54	* @param pages Number of pages to invalidate. Value of (count_t) -1 means the whole TSB.	54	* @param pages Number of pages to invalidate.
-		55	* Value of (count_t) -1 means the whole TSB.
55	*/	56	*/
56	void tsb_invalidate(as_t *as, uintptr_t page, count_t pages)	57	void tsb_invalidate(as_t *as, uintptr_t page, count_t pages)
57	{	58	{
58	index_t i0, i;	59	index_t i0, i;
59	count_t cnt;	60	count_t cnt;
60		61
61	ASSERT(as->arch.itsb && as->arch.dtsb);	62	ASSERT(as->arch.itsb && as->arch.dtsb);
62		63
63	i0 = (page >> PAGE_WIDTH) & TSB_INDEX_MASK;	64	i0 = (page >> PAGE_WIDTH) & TSB_INDEX_MASK;
64	cnt = min(pages, ITSB_ENTRY_COUNT);	65	cnt = min(pages, ITSB_ENTRY_COUNT);
65		66
66	for (i = 0; i < cnt; i++) {	67	for (i = 0; i < cnt; i++) {
67	as->arch.itsb[(i0 + i) & (ITSB_ENTRY_COUNT-1)].tag.invalid = 0;	68	as->arch.itsb[(i0 + i) & (ITSB_ENTRY_COUNT-1)].tag.invalid = true;
68	as->arch.dtsb[(i0 + i) & (DTSB_ENTRY_COUNT-1)].tag.invalid = 0;	69	as->arch.dtsb[(i0 + i) & (DTSB_ENTRY_COUNT-1)].tag.invalid = true;
69	}	70	}
70	}	71	}
71		72
72	/** Copy software PTE to ITSB.	73	/** Copy software PTE to ITSB.
73	*	74	*
74	* @param t Software PTE.	75	* @param t Software PTE.
75	*/	76	*/
76	void itsb_pte_copy(pte_t *t)	77	void itsb_pte_copy(pte_t *t)
77	{	78	{
78	as_t *as;	79	as_t *as;
79	tsb_entry_t *tsb;	80	tsb_entry_t *tsb;
80		81
81	as = t->as;	82	as = t->as;
82	tsb = &as->arch.itsb[(t->page >> PAGE_WIDTH) & TSB_INDEX_MASK];	83	tsb = &as->arch.itsb[(t->page >> PAGE_WIDTH) & TSB_INDEX_MASK];
83		84
84	/*	85	/*
85	* We use write barriers to make sure that the TSB load	86	* We use write barriers to make sure that the TSB load
86	* won't use inconsistent data or that the fault will	87	* won't use inconsistent data or that the fault will
87	* be repeated.	88	* be repeated.
88	*/	89	*/
89		90
90	tsb->tag.invalid = 1; /* invalidate the entry (tag target has this set to 0) */	91	tsb->tag.invalid = true; /* invalidate the entry
-		92	* (tag target has this
-		93	* set to 0) */
91		94
92	write_barrier();	95	write_barrier();
93		96
94	tsb->tag.context = as->asid;	97	tsb->tag.context = as->asid;
95	tsb->tag.va_tag = t->page >> VA_TAG_PAGE_SHIFT;	98	tsb->tag.va_tag = t->page >> VA_TAG_PAGE_SHIFT;
96	tsb->data.value = 0;	99	tsb->data.value = 0;
97	tsb->data.size = PAGESIZE_8K;	100	tsb->data.size = PAGESIZE_8K;
98	tsb->data.pfn = t->frame >> PAGE_WIDTH;	101	tsb->data.pfn = t->frame >> PAGE_WIDTH;
99	tsb->data.cp = t->c;	102	tsb->data.cp = t->c;
100	tsb->data.cv = t->c;	103	tsb->data.cv = t->c;
101	tsb->data.p = t->k; /* p as privileged */	104	tsb->data.p = t->k; /* p as privileged */
102	tsb->data.v = t->p;	105	tsb->data.v = t->p;
103		106
104	write_barrier();	107	write_barrier();
105		108
106	tsb->tag.invalid = 0; /* mark the entry as valid */	109	tsb->tag.invalid = false; /* mark the entry as valid */
107	}	110	}
108		111
109	/** Copy software PTE to DTSB.	112	/** Copy software PTE to DTSB.
110	*	113	*
111	* @param t Software PTE.	114	* @param t Software PTE.
112	* @param ro If true, the mapping is copied read-only.	115	* @param ro If true, the mapping is copied read-only.
113	*/	116	*/
114	void dtsb_pte_copy(pte_t *t, bool ro)	117	void dtsb_pte_copy(pte_t *t, bool ro)
115	{	118	{
116	as_t *as;	119	as_t *as;
117	tsb_entry_t *tsb;	120	tsb_entry_t *tsb;
118		121
119	as = t->as;	122	as = t->as;
120	tsb = &as->arch.dtsb[(t->page >> PAGE_WIDTH) & TSB_INDEX_MASK];	123	tsb = &as->arch.dtsb[(t->page >> PAGE_WIDTH) & TSB_INDEX_MASK];
121		124
122	/*	125	/*
123	* We use write barriers to make sure that the TSB load	126	* We use write barriers to make sure that the TSB load
124	* won't use inconsistent data or that the fault will	127	* won't use inconsistent data or that the fault will
125	* be repeated.	128	* be repeated.
126	*/	129	*/
127		130
128	tsb->tag.invalid = 1; /* invalidate the entry (tag target has this set to 0) */	131	tsb->tag.invalid = true; /* invalidate the entry
-		132	* (tag target has this
-		133	* set to 0) */
129		134
130	write_barrier();	135	write_barrier();
131		136
132	tsb->tag.context = as->asid;	137	tsb->tag.context = as->asid;
133	tsb->tag.va_tag = t->page >> VA_TAG_PAGE_SHIFT;	138	tsb->tag.va_tag = t->page >> VA_TAG_PAGE_SHIFT;
134	tsb->data.value = 0;	139	tsb->data.value = 0;
135	tsb->data.size = PAGESIZE_8K;	140	tsb->data.size = PAGESIZE_8K;
136	tsb->data.pfn = t->frame >> PAGE_WIDTH;	141	tsb->data.pfn = t->frame >> PAGE_WIDTH;
137	tsb->data.cp = t->c;	142	tsb->data.cp = t->c;
138	tsb->data.cv = t->c;	143	tsb->data.cv = t->c;
139	tsb->data.p = t->k; /* p as privileged */	144	tsb->data.p = t->k; /* p as privileged */
140	tsb->data.w = ro ? false : t->w;	145	tsb->data.w = ro ? false : t->w;
141	tsb->data.v = t->p;	146	tsb->data.v = t->p;
142		147
143	write_barrier();	148	write_barrier();
144		149
145	tsb->tag.invalid = 0; /* mark the entry as valid */	150	tsb->tag.invalid = true; /* mark the entry as valid */
146	}	151	}
147		152
148	/** @}	153	/** @}
149	*/	154	*/
150		155

Subversion Repositories HelenOS

(root)/trunk/kernel/arch/sparc64/src/mm/tsb.c – Rev 1917 → 1960