WebSVN – HelenOS – Diff – /tags/0.2.0.1/kernel/arch/ia64/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.
 */
 
#include <arch/mm/as.h>
#include <arch/mm/asid.h>
#include <arch/mm/page.h>
#include <genarch/mm/as_ht.h>
#include <genarch/mm/asid_fifo.h>
#include <mm/asid.h>
#include <arch.h>
#include <arch/barrier.h>
#include <synch/spinlock.h>
 
/** Architecture dependent address space init. */
void as_arch_init(void)
{
    as_operations = &as_ht_operations;
    asid_fifo_init();
}
 
/** Prepare registers for switching to another address space.
 *
 * @param as Address space.
 */
void as_install_arch(as_t *as)
{
    ipl_t ipl;
    region_register rr;
    int i;
   
    ipl = interrupts_disable();
    spinlock_lock(&as->lock);
   
    ASSERT(as->asid != ASID_INVALID);
   
    /*
     * Load respective ASID (7 consecutive RIDs) to
     * region registers.
     */
    for (i = 0; i < REGION_REGISTERS; i++) {
        if (i == VRN_KERNEL)
            continue;
       
        rr.word = rr_read(i);
        rr.map.ve = false;          /* disable VHPT walker */
        rr.map.rid = ASID2RID(as->asid, i);
        rr.map.ps = PAGE_WIDTH;
        rr_write(i, rr.word);
    }
    srlz_d();
    srlz_i();
   
    spinlock_unlock(&as->lock);
    interrupts_restore(ipl);
}
 

Rev 1965	Rev 1968
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	#include <arch/mm/as.h>	29	#include <arch/mm/as.h>
30	#include <arch/mm/asid.h>	30	#include <arch/mm/asid.h>
31	#include <arch/mm/page.h>	31	#include <arch/mm/page.h>
32	#include <genarch/mm/as_ht.h>	32	#include <genarch/mm/as_ht.h>
33	#include <genarch/mm/asid_fifo.h>	33	#include <genarch/mm/asid_fifo.h>
34	#include <mm/asid.h>	34	#include <mm/asid.h>
35	#include <arch.h>	35	#include <arch.h>
36	#include <arch/barrier.h>	36	#include <arch/barrier.h>
37	#include <synch/spinlock.h>	37	#include <synch/spinlock.h>
38		38
39	/** Architecture dependent address space init. */	39	/** Architecture dependent address space init. */
40	void as_arch_init(void)	40	void as_arch_init(void)
41	{	41	{
42	as_operations = &as_ht_operations;	42	as_operations = &as_ht_operations;
43	asid_fifo_init();	43	asid_fifo_init();
44	}	44	}
45		45
46	/** Prepare registers for switching to another address space.	46	/** Prepare registers for switching to another address space.
47	*	47	*
48	* @param as Address space.	48	* @param as Address space.
49	*/	49	*/
50	void as_install_arch(as_t *as)	50	void as_install_arch(as_t *as)
51	{	51	{
52	ipl_t ipl;	52	ipl_t ipl;
53	region_register rr;	53	region_register rr;
54	int i;	54	int i;
55		55
56	ipl = interrupts_disable();	56	ipl = interrupts_disable();
57	spinlock_lock(&as->lock);	57	spinlock_lock(&as->lock);
58		58
59	ASSERT(as->asid != ASID_INVALID);	59	ASSERT(as->asid != ASID_INVALID);
60		60
61	/*	61	/*
62	* Load respective ASID (7 consecutive RIDs) to	62	* Load respective ASID (7 consecutive RIDs) to
63	* region registers.	63	* region registers.
64	*/	64	*/
65	for (i = 0; i < REGION_REGISTERS; i++) {	65	for (i = 0; i < REGION_REGISTERS; i++) {
66	if (i == VRN_KERNEL)	66	if (i == VRN_KERNEL)
67	continue;	67	continue;
68		68
69	rr.word = rr_read(i);	69	rr.word = rr_read(i);
70	rr.map.ve = false; /* disable VHPT walker */	70	rr.map.ve = false; /* disable VHPT walker */
71	rr.map.rid = ASID2RID(as->asid, i);	71	rr.map.rid = ASID2RID(as->asid, i);
72	rr.map.ps = PAGE_WIDTH;	72	rr.map.ps = PAGE_WIDTH;
73	rr_write(i, rr.word);	73	rr_write(i, rr.word);
74	}	74	}
75	srlz_d();	75	srlz_d();
76	srlz_i();	76	srlz_i();
77		77
78	spinlock_unlock(&as->lock);	78	spinlock_unlock(&as->lock);
79	interrupts_restore(ipl);	79	interrupts_restore(ipl);
80	}	80	}
81		81

Subversion Repositories HelenOS

(root)/tags/0.2.0.1/kernel/arch/ia64/src/mm/as.c – Rev 1965 → 1968