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
 
 * @{
 */
/** @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 1702 → 1705

Rev 1702		Rev 1705
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	29	/** @addtogroup sparc64proc
30	* @ingroup proc	-
31	* @{	30	* @{
32	*/	31	*/
33	/** @file	32	/** @file
34	*/	33	*/
35		34
36	#include <proc/scheduler.h>	35	#include <proc/scheduler.h>
37	#include <proc/thread.h>	36	#include <proc/thread.h>
38	#include <arch.h>	37	#include <arch.h>
39	#include <arch/mm/tlb.h>	38	#include <arch/mm/tlb.h>
40	#include <arch/mm/page.h>	39	#include <arch/mm/page.h>
41	#include <config.h>	40	#include <config.h>
42	#include <align.h>	41	#include <align.h>
43		42
44	/** Perform sparc64 specific tasks needed before the new task is run. */	43	/** Perform sparc64 specific tasks needed before the new task is run. */
45	void before_task_runs_arch(void)	44	void before_task_runs_arch(void)
46	{	45	{
47	}	46	}
48		47
49	/** Ensure that thread's kernel stack is locked in TLB. */	48	/** Ensure that thread's kernel stack is locked in TLB. */
50	void before_thread_runs_arch(void)	49	void before_thread_runs_arch(void)
51	{	50	{
52	__address base;	51	__address base;
53		52
54	base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH);	53	base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH);
55		54
56	if ((__address) THREAD->kstack < base \|\| (__address) THREAD->kstack > base + (1<<KERNEL_PAGE_WIDTH)) {	55	if ((__address) THREAD->kstack < base \|\| (__address) THREAD->kstack > base + (1<<KERNEL_PAGE_WIDTH)) {
57	/*	56	/*
58	* Kernel stack of this thread is not locked in DTLB.	57	* Kernel stack of this thread is not locked in DTLB.
59	* First, make sure it is not mapped already.	58	* First, make sure it is not mapped already.
60	* If not, create a locked mapping for it.	59	* If not, create a locked mapping for it.
61	*/	60	*/
62	dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_NUCLEUS, (__address) THREAD->kstack);	61	dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_NUCLEUS, (__address) THREAD->kstack);
63	dtlb_insert_mapping((__address) THREAD->kstack, KA2PA(THREAD->kstack), PAGESIZE_8K, true, true);	62	dtlb_insert_mapping((__address) THREAD->kstack, KA2PA(THREAD->kstack), PAGESIZE_8K, true, true);
64	}	63	}
65	}	64	}
66		65
67	/** Unlock thread's stack from TLB, if necessary. */	66	/** Unlock thread's stack from TLB, if necessary. */
68	void after_thread_ran_arch(void)	67	void after_thread_ran_arch(void)
69	{	68	{
70	__address base;	69	__address base;
71		70
72	base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH);	71	base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH);
73		72
74	if ((__address) THREAD->kstack < base \|\| (__address) THREAD->kstack > base + (1<<KERNEL_PAGE_WIDTH)) {	73	if ((__address) THREAD->kstack < base \|\| (__address) THREAD->kstack > base + (1<<KERNEL_PAGE_WIDTH)) {
75	/*	74	/*
76	* Kernel stack of this thread is locked in DTLB.	75	* Kernel stack of this thread is locked in DTLB.
77	* Destroy the mapping.	76	* Destroy the mapping.
78	*/	77	*/
79	dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_NUCLEUS, (__address) THREAD->kstack);	78	dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_NUCLEUS, (__address) THREAD->kstack);
80	}	79	}
81	}	80	}
82		81
83	/** @}	82	/** @}
84	*/	83	*/
85		84
86		85