WebSVN – HelenOS – Diff – /branches/fs/kernel/arch/sparc64/src/mm/as.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/as.h>
#include <arch/mm/tlb.h>
#include <genarch/mm/page_ht.h>
#include <genarch/mm/asid_fifo.h>
#include <debug.h>
#include <config.h>
 
#ifdef CONFIG_TSB
#include <arch/mm/tsb.h>
#include <arch/memstr.h>
 
#include <arch/asm.h>
#include <mm/frame.h>
#include <bitops.h>
#include <macros.h>
#endif /* CONFIG_TSB */
 
/** Architecture dependent address space init. */
void as_arch_init(void)
{
    if (config.cpu_active == 1) {
        as_operations = &as_ht_operations;
        asid_fifo_init();
    }
}
 
int as_constructor_arch(as_t *as, int flags)
{
#ifdef CONFIG_TSB
    /*
     * The order must be calculated with respect to the emulated
     * 16K page size.
     */
    int order = fnzb32(((ITSB_ENTRY_COUNT + DTSB_ENTRY_COUNT) *
        sizeof(tsb_entry_t)) >> FRAME_WIDTH);
 
    uintptr_t tsb = (uintptr_t) frame_alloc(order, flags | FRAME_KA);
 
    if (!tsb)
        return -1;
 
    as->arch.itsb = (tsb_entry_t *) tsb;
    as->arch.dtsb = (tsb_entry_t *) (tsb + ITSB_ENTRY_COUNT *
        sizeof(tsb_entry_t));
 
    memsetb((uintptr_t) as->arch.itsb,
        (ITSB_ENTRY_COUNT + DTSB_ENTRY_COUNT) * sizeof(tsb_entry_t), 0);
#endif
    return 0;
}
 
int as_destructor_arch(as_t *as)
{
#ifdef CONFIG_TSB
    /*
     * The count must be calculated with respect to the emualted 16K page
     * size.
     */
    count_t cnt = ((ITSB_ENTRY_COUNT + DTSB_ENTRY_COUNT) *
        sizeof(tsb_entry_t)) >> FRAME_WIDTH;
    frame_free(KA2PA((uintptr_t) as->arch.itsb));
    return cnt;
#else
    return 0;
#endif
}
 
int as_create_arch(as_t *as, int flags)
{
#ifdef CONFIG_TSB
 
 
 
 
    tsb_invalidate(as, 0, (count_t) -1);
 
 
#endif
    return 0;
}
 
/** Perform sparc64-specific tasks when an address space becomes active on the
 * processor.
 *
 * Install ASID and map TSBs.
 *
 * @param as Address space.
 */
void as_install_arch(as_t *as)
{
    tlb_context_reg_t ctx;
   
    /*
     * Note that we don't and may not lock the address space. That's ok
 
     * since we only read members that are currently read-only.
     *
     * Moreover, the as->asid is protected by asidlock, which is being held.
     */
   
    /*
     * Write ASID to secondary context register. The primary context
 
     * register has to be set from TL>0 so it will be filled from the
     * secondary context register from the TL=1 code just before switch to
     * userspace.
     */
    ctx.v = 0;
    ctx.context = as->asid;
    mmu_secondary_context_write(ctx.v);
 
#ifdef CONFIG_TSB   
    uintptr_t base = ALIGN_DOWN(config.base, 1 << KERNEL_PAGE_WIDTH);
 
    ASSERT(as->arch.itsb && as->arch.dtsb);
 
    uintptr_t tsb = (uintptr_t) as->arch.itsb;
       
    if (!overlaps(tsb, 8 * MMU_PAGE_SIZE, base, 1 << KERNEL_PAGE_WIDTH)) {
        /*
         * TSBs were allocated from memory not covered
         * by the locked 4M kernel DTLB entry. We need
         * to map both TSBs explicitly.
         */
        dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_NUCLEUS, tsb);
        dtlb_insert_mapping(tsb, KA2PA(tsb), PAGESIZE_64K, true, true);
    }
       
    /*
     * Setup TSB Base registers.
     */
    tsb_base_reg_t tsb_base;
       
    tsb_base.value = 0;
    tsb_base.size = TSB_SIZE;
    tsb_base.split = 0;
 
    tsb_base.base = ((uintptr_t) as->arch.itsb) >> MMU_PAGE_WIDTH;
    itsb_base_write(tsb_base.value);
    tsb_base.base = ((uintptr_t) as->arch.dtsb) >> MMU_PAGE_WIDTH;
    dtsb_base_write(tsb_base.value);
#endif
}
 
/** Perform sparc64-specific tasks when an address space is removed from the
 * processor.
 *
 * Demap TSBs.
 *
 * @param as Address space.
 */
void as_deinstall_arch(as_t *as)
{
 
    /*
     * Note that we don't and may not lock the address space. That's ok
 
     * since we only read members that are currently read-only.
     *
     * Moreover, the as->asid is protected by asidlock, which is being held.
     */
 
#ifdef CONFIG_TSB
    uintptr_t base = ALIGN_DOWN(config.base, 1 << KERNEL_PAGE_WIDTH);
 
    ASSERT(as->arch.itsb && as->arch.dtsb);
 
    uintptr_t tsb = (uintptr_t) as->arch.itsb;
       
    if (!overlaps(tsb, 8 * MMU_PAGE_SIZE, base, 1 << KERNEL_PAGE_WIDTH)) {
        /*
         * TSBs were allocated from memory not covered
         * by the locked 4M kernel DTLB entry. We need
         * to demap the entry installed by as_install_arch().
         */
        dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_NUCLEUS, tsb);
    }
#endif
}
 
/** @}
 */
 

Rev 2131	Rev 2422
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/as.h>	35	#include <arch/mm/as.h>
36	#include <arch/mm/tlb.h>	36	#include <arch/mm/tlb.h>
37	#include <genarch/mm/page_ht.h>	37	#include <genarch/mm/page_ht.h>
38	#include <genarch/mm/asid_fifo.h>	38	#include <genarch/mm/asid_fifo.h>
39	#include <debug.h>	39	#include <debug.h>
40	#include <config.h>	40	#include <config.h>
41		41
42	#ifdef CONFIG_TSB	42	#ifdef CONFIG_TSB
43	#include <arch/mm/tsb.h>	43	#include <arch/mm/tsb.h>
44	#include <arch/memstr.h>	44	#include <arch/memstr.h>
45	#include <synch/mutex.h>	-
46	#include <arch/asm.h>	45	#include <arch/asm.h>
47	#include <mm/frame.h>	46	#include <mm/frame.h>
48	#include <bitops.h>	47	#include <bitops.h>
49	#include <macros.h>	48	#include <macros.h>
50	#endif /* CONFIG_TSB */	49	#endif /* CONFIG_TSB */
51		50
52	/** Architecture dependent address space init. */	51	/** Architecture dependent address space init. */
53	void as_arch_init(void)	52	void as_arch_init(void)
54	{	53	{
55	if (config.cpu_active == 1) {	54	if (config.cpu_active == 1) {
56	as_operations = &as_ht_operations;	55	as_operations = &as_ht_operations;
57	asid_fifo_init();	56	asid_fifo_init();
58	}	57	}
59	}	58	}
60		59
61	int as_constructor_arch(as_t *as, int flags)	60	int as_constructor_arch(as_t *as, int flags)
62	{	61	{
63	#ifdef CONFIG_TSB	62	#ifdef CONFIG_TSB
-		63	/*
-		64	* The order must be calculated with respect to the emulated
-		65	* 16K page size.
-		66	*/
64	int order = fnzb32(((ITSB_ENTRY_COUNT + DTSB_ENTRY_COUNT) *	67	int order = fnzb32(((ITSB_ENTRY_COUNT + DTSB_ENTRY_COUNT) *
65	sizeof(tsb_entry_t)) >> FRAME_WIDTH);	68	sizeof(tsb_entry_t)) >> FRAME_WIDTH);
-		69
66	uintptr_t tsb = (uintptr_t) frame_alloc(order, flags \| FRAME_KA);	70	uintptr_t tsb = (uintptr_t) frame_alloc(order, flags \| FRAME_KA);
67		71
68	if (!tsb)	72	if (!tsb)
69	return -1;	73	return -1;
70		74
71	as->arch.itsb = (tsb_entry_t *) tsb;	75	as->arch.itsb = (tsb_entry_t *) tsb;
72	as->arch.dtsb = (tsb_entry_t ) (tsb + ITSB_ENTRY_COUNT	76	as->arch.dtsb = (tsb_entry_t ) (tsb + ITSB_ENTRY_COUNT
73	sizeof(tsb_entry_t));	77	sizeof(tsb_entry_t));
-		78
74	memsetb((uintptr_t) as->arch.itsb, (ITSB_ENTRY_COUNT + DTSB_ENTRY_COUNT)	79	memsetb((uintptr_t) as->arch.itsb,
75	* sizeof(tsb_entry_t), 0);	80	(ITSB_ENTRY_COUNT + DTSB_ENTRY_COUNT) * sizeof(tsb_entry_t), 0);
76	#endif	81	#endif
77	return 0;	82	return 0;
78	}	83	}
79		84
80	int as_destructor_arch(as_t *as)	85	int as_destructor_arch(as_t *as)
81	{	86	{
82	#ifdef CONFIG_TSB	87	#ifdef CONFIG_TSB
-		88	/*
-		89	* The count must be calculated with respect to the emualted 16K page
-		90	* size.
-		91	*/
83	count_t cnt = ((ITSB_ENTRY_COUNT + DTSB_ENTRY_COUNT) *	92	count_t cnt = ((ITSB_ENTRY_COUNT + DTSB_ENTRY_COUNT) *
84	sizeof(tsb_entry_t)) >> FRAME_WIDTH;	93	sizeof(tsb_entry_t)) >> FRAME_WIDTH;
85	frame_free(KA2PA((uintptr_t) as->arch.itsb));	94	frame_free(KA2PA((uintptr_t) as->arch.itsb));
86	return cnt;	95	return cnt;
87	#else	96	#else
88	return 0;	97	return 0;
89	#endif	98	#endif
90	}	99	}
91		100
92	int as_create_arch(as_t *as, int flags)	101	int as_create_arch(as_t *as, int flags)
93	{	102	{
94	#ifdef CONFIG_TSB	103	#ifdef CONFIG_TSB
95	ipl_t ipl;	-
96		-
97	ipl = interrupts_disable();	-
98	mutex_lock_active(&as->lock); /* completely unnecessary, but polite */	-
99	tsb_invalidate(as, 0, (count_t) -1);	104	tsb_invalidate(as, 0, (count_t) -1);
100	mutex_unlock(&as->lock);	-
101	interrupts_restore(ipl);	-
102	#endif	105	#endif
103	return 0;	106	return 0;
104	}	107	}
105		108
106	/** Perform sparc64-specific tasks when an address space becomes active on the	109	/** Perform sparc64-specific tasks when an address space becomes active on the
107	* processor.	110	* processor.
108	*	111	*
109	* Install ASID and map TSBs.	112	* Install ASID and map TSBs.
110	*	113	*
111	* @param as Address space.	114	* @param as Address space.
112	*/	115	*/
113	void as_install_arch(as_t *as)	116	void as_install_arch(as_t *as)
114	{	117	{
115	tlb_context_reg_t ctx;	118	tlb_context_reg_t ctx;
116		119
117	/*	120	/*
118	* Note that we don't lock the address space.	121	* Note that we don't and may not lock the address space. That's ok
119	* That's correct - we can afford it here	-
120	* because we only read members that are	122	* since we only read members that are currently read-only.
-		123	*
121	* currently read-only.	124	* Moreover, the as->asid is protected by asidlock, which is being held.
122	*/	125	*/
123		126
124	/*	127	/*
125	* Write ASID to secondary context register.	128	* Write ASID to secondary context register. The primary context
126	* The primary context register has to be set	-
127	* from TL>0 so it will be filled from the	129	* register has to be set from TL>0 so it will be filled from the
128	* secondary context register from the TL=1	130	* secondary context register from the TL=1 code just before switch to
129	* code just before switch to userspace.	131	* userspace.
130	*/	132	*/
131	ctx.v = 0;	133	ctx.v = 0;
132	ctx.context = as->asid;	134	ctx.context = as->asid;
133	mmu_secondary_context_write(ctx.v);	135	mmu_secondary_context_write(ctx.v);
134		136
135	#ifdef CONFIG_TSB	137	#ifdef CONFIG_TSB
136	uintptr_t base = ALIGN_DOWN(config.base, 1 << KERNEL_PAGE_WIDTH);	138	uintptr_t base = ALIGN_DOWN(config.base, 1 << KERNEL_PAGE_WIDTH);
137		139
138	ASSERT(as->arch.itsb && as->arch.dtsb);	140	ASSERT(as->arch.itsb && as->arch.dtsb);
139		141
140	uintptr_t tsb = (uintptr_t) as->arch.itsb;	142	uintptr_t tsb = (uintptr_t) as->arch.itsb;
141		143
142	if (!overlaps(tsb, 8 * PAGE_SIZE, base, 1 << KERNEL_PAGE_WIDTH)) {	144	if (!overlaps(tsb, 8 * MMU_PAGE_SIZE, base, 1 << KERNEL_PAGE_WIDTH)) {
143	/*	145	/*
144	* TSBs were allocated from memory not covered	146	* TSBs were allocated from memory not covered
145	* by the locked 4M kernel DTLB entry. We need	147	* by the locked 4M kernel DTLB entry. We need
146	* to map both TSBs explicitly.	148	* to map both TSBs explicitly.
147	*/	149	*/
148	dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_NUCLEUS, tsb);	150	dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_NUCLEUS, tsb);
149	dtlb_insert_mapping(tsb, KA2PA(tsb), PAGESIZE_64K, true, true);	151	dtlb_insert_mapping(tsb, KA2PA(tsb), PAGESIZE_64K, true, true);
150	}	152	}
151		153
152	/*	154	/*
153	* Setup TSB Base registers.	155	* Setup TSB Base registers.
154	*/	156	*/
155	tsb_base_reg_t tsb_base;	157	tsb_base_reg_t tsb_base;
156		158
157	tsb_base.value = 0;	159	tsb_base.value = 0;
158	tsb_base.size = TSB_SIZE;	160	tsb_base.size = TSB_SIZE;
159	tsb_base.split = 0;	161	tsb_base.split = 0;
160		162
161	tsb_base.base = ((uintptr_t) as->arch.itsb) >> PAGE_WIDTH;	163	tsb_base.base = ((uintptr_t) as->arch.itsb) >> MMU_PAGE_WIDTH;
162	itsb_base_write(tsb_base.value);	164	itsb_base_write(tsb_base.value);
163	tsb_base.base = ((uintptr_t) as->arch.dtsb) >> PAGE_WIDTH;	165	tsb_base.base = ((uintptr_t) as->arch.dtsb) >> MMU_PAGE_WIDTH;
164	dtsb_base_write(tsb_base.value);	166	dtsb_base_write(tsb_base.value);
165	#endif	167	#endif
166	}	168	}
167		169
168	/** Perform sparc64-specific tasks when an address space is removed from the	170	/** Perform sparc64-specific tasks when an address space is removed from the
169	* processor.	171	* processor.
170	*	172	*
171	* Demap TSBs.	173	* Demap TSBs.
172	*	174	*
173	* @param as Address space.	175	* @param as Address space.
174	*/	176	*/
175	void as_deinstall_arch(as_t *as)	177	void as_deinstall_arch(as_t *as)
176	{	178	{
177		179
178	/*	180	/*
179	* Note that we don't lock the address space.	181	* Note that we don't and may not lock the address space. That's ok
180	* That's correct - we can afford it here	-
181	* because we only read members that are	182	* since we only read members that are currently read-only.
-		183	*
182	* currently read-only.	184	* Moreover, the as->asid is protected by asidlock, which is being held.
183	*/	185	*/
184		186
185	#ifdef CONFIG_TSB	187	#ifdef CONFIG_TSB
186	uintptr_t base = ALIGN_DOWN(config.base, 1 << KERNEL_PAGE_WIDTH);	188	uintptr_t base = ALIGN_DOWN(config.base, 1 << KERNEL_PAGE_WIDTH);
187		189
188	ASSERT(as->arch.itsb && as->arch.dtsb);	190	ASSERT(as->arch.itsb && as->arch.dtsb);
189		191
190	uintptr_t tsb = (uintptr_t) as->arch.itsb;	192	uintptr_t tsb = (uintptr_t) as->arch.itsb;
191		193
192	if (!overlaps(tsb, 8 * PAGE_SIZE, base, 1 << KERNEL_PAGE_WIDTH)) {	194	if (!overlaps(tsb, 8 * MMU_PAGE_SIZE, base, 1 << KERNEL_PAGE_WIDTH)) {
193	/*	195	/*
194	* TSBs were allocated from memory not covered	196	* TSBs were allocated from memory not covered
195	* by the locked 4M kernel DTLB entry. We need	197	* by the locked 4M kernel DTLB entry. We need
196	* to demap the entry installed by as_install_arch().	198	* to demap the entry installed by as_install_arch().
197	*/	199	*/
198	dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_NUCLEUS, tsb);	200	dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_NUCLEUS, tsb);
199	}	201	}
200	#endif	202	#endif
201	}	203	}
202		204
203	/** @}	205	/** @}
204	*/	206	*/
205		207

Subversion Repositories HelenOS

(root)/branches/fs/kernel/arch/sparc64/src/mm/as.c – Rev 2131 → 2422