WebSVN – HelenOS – Diff – /branches/sparc/kernel/generic/src/mm/tlb.c


/*
 * Copyright (C) 2001-2004 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.
 */
 
#include <mm/tlb.h>
#include <arch/mm/tlb.h>
#include <smp/ipi.h>
#include <synch/spinlock.h>
#include <typedefs.h>
#include <arch/atomic.h>
#include <arch/interrupt.h>
#include <config.h>
#include <arch.h>
#include <panic.h>
 
 
SPINLOCK_INITIALIZE(tlblock);
 
 
void tlb_init(void)
{
 
 
 
    tlb_arch_init();
}
 
#ifdef CONFIG_SMP
/* must be called with interrupts disabled */
void tlb_shootdown_start(void)
{
    int i;
 
    CPU->tlb_active = 0;
    spinlock_lock(&tlblock);
    tlb_shootdown_ipi_send();
    tlb_invalidate(0); /* TODO: use valid ASID */
   
busy_wait: 
    for (i = 0; i<config.cpu_count; i++)
        if (cpus[i].tlb_active)
            goto busy_wait;
}
 
void tlb_shootdown_finalize(void)
{
    spinlock_unlock(&tlblock);
    CPU->tlb_active = 1;
}
 
void tlb_shootdown_ipi_send(void)
{
    ipi_broadcast(VECTOR_TLB_SHOOTDOWN_IPI);
}
 
void tlb_shootdown_ipi_recv(void)
{
    CPU->tlb_active = 0;
    spinlock_lock(&tlblock);
    spinlock_unlock(&tlblock);
    tlb_invalidate(0);  /* TODO: use valid ASID */
    CPU->tlb_active = 1;
}
#endif /* CONFIG_SMP */
 

Rev 594	Rev 623
1	/*	1	/*
2	* Copyright (C) 2001-2004 Jakub Jermar	2	* Copyright (C) 2001-2004 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	#include <mm/tlb.h>	29	#include <mm/tlb.h>
30	#include <arch/mm/tlb.h>	30	#include <arch/mm/tlb.h>
31	#include <smp/ipi.h>	31	#include <smp/ipi.h>
32	#include <synch/spinlock.h>	32	#include <synch/spinlock.h>
33	#include <typedefs.h>	33	#include <typedefs.h>
34	#include <arch/atomic.h>	34	#include <arch/atomic.h>
35	#include <arch/interrupt.h>	35	#include <arch/interrupt.h>
36	#include <config.h>	36	#include <config.h>
37	#include <arch.h>	37	#include <arch.h>
38	#include <panic.h>	38	#include <panic.h>
39		39
40	#ifdef CONFIG_SMP	-
41	static spinlock_t tlblock;	40	SPINLOCK_INITIALIZE(tlblock);
42	#endif	-
43		41
44	void tlb_init(void)	42	void tlb_init(void)
45	{	43	{
46	if (config.cpu_active == 1)	-
47	spinlock_initialize(&tlblock, "tlb_lock");	-
48		-
49	tlb_arch_init();	44	tlb_arch_init();
50	}	45	}
51		46
52	#ifdef CONFIG_SMP	47	#ifdef CONFIG_SMP
53	/* must be called with interrupts disabled */	48	/* must be called with interrupts disabled */
54	void tlb_shootdown_start(void)	49	void tlb_shootdown_start(void)
55	{	50	{
56	int i;	51	int i;
57		52
58	CPU->tlb_active = 0;	53	CPU->tlb_active = 0;
59	spinlock_lock(&tlblock);	54	spinlock_lock(&tlblock);
60	tlb_shootdown_ipi_send();	55	tlb_shootdown_ipi_send();
61	tlb_invalidate(0); /* TODO: use valid ASID */	56	tlb_invalidate(0); /* TODO: use valid ASID */
62		57
63	busy_wait:	58	busy_wait:
64	for (i = 0; i<config.cpu_count; i++)	59	for (i = 0; i<config.cpu_count; i++)
65	if (cpus[i].tlb_active)	60	if (cpus[i].tlb_active)
66	goto busy_wait;	61	goto busy_wait;
67	}	62	}
68		63
69	void tlb_shootdown_finalize(void)	64	void tlb_shootdown_finalize(void)
70	{	65	{
71	spinlock_unlock(&tlblock);	66	spinlock_unlock(&tlblock);
72	CPU->tlb_active = 1;	67	CPU->tlb_active = 1;
73	}	68	}
74		69
75	void tlb_shootdown_ipi_send(void)	70	void tlb_shootdown_ipi_send(void)
76	{	71	{
77	ipi_broadcast(VECTOR_TLB_SHOOTDOWN_IPI);	72	ipi_broadcast(VECTOR_TLB_SHOOTDOWN_IPI);
78	}	73	}
79		74
80	void tlb_shootdown_ipi_recv(void)	75	void tlb_shootdown_ipi_recv(void)
81	{	76	{
82	CPU->tlb_active = 0;	77	CPU->tlb_active = 0;
83	spinlock_lock(&tlblock);	78	spinlock_lock(&tlblock);
84	spinlock_unlock(&tlblock);	79	spinlock_unlock(&tlblock);
85	tlb_invalidate(0); /* TODO: use valid ASID */	80	tlb_invalidate(0); /* TODO: use valid ASID */
86	CPU->tlb_active = 1;	81	CPU->tlb_active = 1;
87	}	82	}
88	#endif /* CONFIG_SMP */	83	#endif /* CONFIG_SMP */
89		84

Subversion Repositories HelenOS

(root)/branches/sparc/kernel/generic/src/mm/tlb.c @ 3862 – Rev 594 → 623