WebSVN – HelenOS-historic – Diff – /SPARTAN/trunk/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 <smp/ipi.h>
#include <synch/spinlock.h>
#include <typedefs.h>
#include <arch/atomic.h>
#include <arch/interrupt.h>
#include <config.h>
#include <arch.h>
 
#ifdef __SMP__
static spinlock_t tlblock;
 
void tlb_init(void)
{
    spinlock_initialize(&tlblock);
}
 
/* 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 /* __SMP__ */
 

Rev 32	Rev 111
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 <smp/ipi.h>	30	#include <smp/ipi.h>
31	#include <synch/spinlock.h>	31	#include <synch/spinlock.h>
32	#include <typedefs.h>	32	#include <typedefs.h>
33	#include <arch/smp/atomic.h>	33	#include <arch/atomic.h>
34	#include <arch/interrupt.h>	34	#include <arch/interrupt.h>
35	#include <config.h>	35	#include <config.h>
36	#include <arch.h>	36	#include <arch.h>
37		37
38	#ifdef __SMP__	38	#ifdef __SMP__
39	static spinlock_t tlblock;	39	static spinlock_t tlblock;
40		40
41	void tlb_init(void)	41	void tlb_init(void)
42	{	42	{
43	spinlock_initialize(&tlblock);	43	spinlock_initialize(&tlblock);
44	}	44	}
45		45
46	/* must be called with interrupts disabled */	46	/* must be called with interrupts disabled */
47	void tlb_shootdown_start(void)	47	void tlb_shootdown_start(void)
48	{	48	{
49	int i;	49	int i;
50		50
51	CPU->tlb_active = 0;	51	CPU->tlb_active = 0;
52	spinlock_lock(&tlblock);	52	spinlock_lock(&tlblock);
53	tlb_shootdown_ipi_send();	53	tlb_shootdown_ipi_send();
54	tlb_invalidate(0); /* TODO: use valid ASID */	54	tlb_invalidate(0); /* TODO: use valid ASID */
55		55
56	busy_wait:	56	busy_wait:
57	for (i = 0; i<config.cpu_count; i++)	57	for (i = 0; i<config.cpu_count; i++)
58	if (cpus[i].tlb_active)	58	if (cpus[i].tlb_active)
59	goto busy_wait;	59	goto busy_wait;
60	}	60	}
61		61
62	void tlb_shootdown_finalize(void)	62	void tlb_shootdown_finalize(void)
63	{	63	{
64	spinlock_unlock(&tlblock);	64	spinlock_unlock(&tlblock);
65	CPU->tlb_active = 1;	65	CPU->tlb_active = 1;
66	}	66	}
67		67
68	void tlb_shootdown_ipi_send(void)	68	void tlb_shootdown_ipi_send(void)
69	{	69	{
70	ipi_broadcast(VECTOR_TLB_SHOOTDOWN_IPI);	70	ipi_broadcast(VECTOR_TLB_SHOOTDOWN_IPI);
71	}	71	}
72		72
73	void tlb_shootdown_ipi_recv(void)	73	void tlb_shootdown_ipi_recv(void)
74	{	74	{
75	CPU->tlb_active = 0;	75	CPU->tlb_active = 0;
76	spinlock_lock(&tlblock);	76	spinlock_lock(&tlblock);
77	spinlock_unlock(&tlblock);	77	spinlock_unlock(&tlblock);
78	tlb_invalidate(0); /* TODO: use valid ASID */	78	tlb_invalidate(0); /* TODO: use valid ASID */
79	CPU->tlb_active = 1;	79	CPU->tlb_active = 1;
80	}	80	}
81	#endif /* __SMP__ */	81	#endif /* __SMP__ */
82		82

Subversion Repositories HelenOS-historic

(root)/SPARTAN/trunk/src/mm/tlb.c – Rev 32 → 111