WebSVN – HelenOS-historic – Diff – /kernel/trunk/arch/sparc64/src/proc/scheduler.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 sparc64proc sparc64
 * @ingroup proc
 * @{
 */
/** @file
 */
 
#include <proc/scheduler.h>
#include <proc/thread.h>
#include <arch.h>
#include <arch/mm/tlb.h>
#include <arch/mm/page.h>
#include <config.h>
#include <align.h>
 
/** Perform sparc64 specific tasks needed before the new task is run. */
void before_task_runs_arch(void)
{
}
 
/** Ensure that thread's kernel stack is locked in TLB. */
void before_thread_runs_arch(void)
{
    __address base;
   
    base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH);
 
    if ((__address) THREAD->kstack < base || (__address) THREAD->kstack > base + (1<<KERNEL_PAGE_WIDTH)) {
        /*
         * Kernel stack of this thread is not locked in DTLB.
         * First, make sure it is not mapped already.
         * If not, create a locked mapping for it.
         */
         dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_NUCLEUS, (__address) THREAD->kstack);
         dtlb_insert_mapping((__address) THREAD->kstack, KA2PA(THREAD->kstack), PAGESIZE_8K, true, true);
    }  
}
 
/** Unlock thread's stack from TLB, if necessary. */
void after_thread_ran_arch(void)
{
    __address base;
 
    base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH);
 
    if ((__address) THREAD->kstack < base || (__address) THREAD->kstack > base + (1<<KERNEL_PAGE_WIDTH)) {
        /*
         * Kernel stack of this thread is locked in DTLB.
         * Destroy the mapping.
         */
        dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_NUCLEUS, (__address) THREAD->kstack);
    }
}
 
 /** @}
 */
 
 

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/sparc64/src/proc/scheduler.c – Rev 1187 → 1702

Rev 1187		Rev 1702
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 sparc64proc sparc64
-		30	* @ingroup proc
-		31	* @{
-		32	*/
-		33	/** @file
-		34	*/
-		35
29	#include <proc/scheduler.h>	36	#include <proc/scheduler.h>
30	#include <proc/thread.h>	37	#include <proc/thread.h>
31	#include <arch.h>	38	#include <arch.h>
32	#include <arch/mm/tlb.h>	39	#include <arch/mm/tlb.h>
33	#include <arch/mm/page.h>	40	#include <arch/mm/page.h>
34	#include <config.h>	41	#include <config.h>
35	#include <align.h>	42	#include <align.h>
36		43
37	/** Perform sparc64 specific tasks needed before the new task is run. */	44	/** Perform sparc64 specific tasks needed before the new task is run. */
38	void before_task_runs_arch(void)	45	void before_task_runs_arch(void)
39	{	46	{
40	}	47	}
41		48
42	/** Ensure that thread's kernel stack is locked in TLB. */	49	/** Ensure that thread's kernel stack is locked in TLB. */
43	void before_thread_runs_arch(void)	50	void before_thread_runs_arch(void)
44	{	51	{
45	__address base;	52	__address base;
46		53
47	base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH);	54	base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH);
48		55
49	if ((__address) THREAD->kstack < base \|\| (__address) THREAD->kstack > base + (1<<KERNEL_PAGE_WIDTH)) {	56	if ((__address) THREAD->kstack < base \|\| (__address) THREAD->kstack > base + (1<<KERNEL_PAGE_WIDTH)) {
50	/*	57	/*
51	* Kernel stack of this thread is not locked in DTLB.	58	* Kernel stack of this thread is not locked in DTLB.
52	* First, make sure it is not mapped already.	59	* First, make sure it is not mapped already.
53	* If not, create a locked mapping for it.	60	* If not, create a locked mapping for it.
54	*/	61	*/
55	dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_NUCLEUS, (__address) THREAD->kstack);	62	dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_NUCLEUS, (__address) THREAD->kstack);
56	dtlb_insert_mapping((__address) THREAD->kstack, KA2PA(THREAD->kstack), PAGESIZE_8K, true, true);	63	dtlb_insert_mapping((__address) THREAD->kstack, KA2PA(THREAD->kstack), PAGESIZE_8K, true, true);
57	}	64	}
58	}	65	}
59		66
60	/** Unlock thread's stack from TLB, if necessary. */	67	/** Unlock thread's stack from TLB, if necessary. */
61	void after_thread_ran_arch(void)	68	void after_thread_ran_arch(void)
62	{	69	{
63	__address base;	70	__address base;
64		71
65	base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH);	72	base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH);
66		73
67	if ((__address) THREAD->kstack < base \|\| (__address) THREAD->kstack > base + (1<<KERNEL_PAGE_WIDTH)) {	74	if ((__address) THREAD->kstack < base \|\| (__address) THREAD->kstack > base + (1<<KERNEL_PAGE_WIDTH)) {
68	/*	75	/*
69	* Kernel stack of this thread is locked in DTLB.	76	* Kernel stack of this thread is locked in DTLB.
70	* Destroy the mapping.	77	* Destroy the mapping.
71	*/	78	*/
72	dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_NUCLEUS, (__address) THREAD->kstack);	79	dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_NUCLEUS, (__address) THREAD->kstack);
73	}	80	}
74	}	81	}
-		82
-		83	/** @}
-		84	*/
-		85
75		86