WebSVN – HelenOS-historic – Diff – /kernel/trunk/arch/amd64/src/proc/scheduler.c


/*
 * Copyright (C) 2005 Ondrej Palkovsky
 * 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 amd64proc
 * @{
 */
/** @file
 */
 
#include <proc/scheduler.h>
#include <cpu.h>
#include <proc/task.h>
#include <proc/thread.h>
#include <arch.h>
#include <arch/context.h>   /* SP_DELTA */
#include <arch/asm.h>
#include <arch/debugger.h>
#include <print.h>
#include <arch/pm.h>
#include <arch/ddi/ddi.h>
 
/** Perform amd64 specific tasks needed before the new task is run.
 *
 * Interrupts are disabled.
 */
void before_task_runs_arch(void)
{
    io_perm_bitmap_install();
}
 
/** Perform amd64 specific tasks needed before the new thread is scheduled. */
void before_thread_runs_arch(void)
{
    CPU->arch.tss->rsp0 = (uintptr_t) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA];
 
    /* Syscall support - write address of thread stack pointer to
     * hidden part of gs */
    swapgs();
    write_msr(AMD_MSR_GS, (uint64_t)&THREAD->kstack);
    swapgs();
 
    /* TLS support - set FS to thread local storage */
    write_msr(AMD_MSR_FS, THREAD->arch.tls);
 
#ifdef CONFIG_DEBUG_AS_WATCHPOINT
    /* Set watchpoint on AS to ensure that nobody sets it to zero */
    if (CPU->id < BKPOINTS_MAX)
        breakpoint_add(&((the_t *) THREAD->kstack)->as,
                   BKPOINT_WRITE | BKPOINT_CHECK_ZERO,
                   CPU->id);
#endif
}
 
void after_thread_ran_arch(void)
{
}
 
 /** @}
 */
 
 

Rev 1705	Rev 1780
1	/*	1	/*
2	* Copyright (C) 2005 Ondrej Palkovsky	2	* Copyright (C) 2005 Ondrej Palkovsky
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 amd64proc	29	/** @addtogroup amd64proc
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#include <proc/scheduler.h>	35	#include <proc/scheduler.h>
36	#include <cpu.h>	36	#include <cpu.h>
37	#include <proc/task.h>	37	#include <proc/task.h>
38	#include <proc/thread.h>	38	#include <proc/thread.h>
39	#include <arch.h>	39	#include <arch.h>
40	#include <arch/context.h> /* SP_DELTA */	40	#include <arch/context.h> /* SP_DELTA */
41	#include <arch/asm.h>	41	#include <arch/asm.h>
42	#include <arch/debugger.h>	42	#include <arch/debugger.h>
43	#include <print.h>	43	#include <print.h>
44	#include <arch/pm.h>	44	#include <arch/pm.h>
45	#include <arch/ddi/ddi.h>	45	#include <arch/ddi/ddi.h>
46		46
47	/** Perform amd64 specific tasks needed before the new task is run.	47	/** Perform amd64 specific tasks needed before the new task is run.
48	*	48	*
49	* Interrupts are disabled.	49	* Interrupts are disabled.
50	*/	50	*/
51	void before_task_runs_arch(void)	51	void before_task_runs_arch(void)
52	{	52	{
53	io_perm_bitmap_install();	53	io_perm_bitmap_install();
54	}	54	}
55		55
56	/** Perform amd64 specific tasks needed before the new thread is scheduled. */	56	/** Perform amd64 specific tasks needed before the new thread is scheduled. */
57	void before_thread_runs_arch(void)	57	void before_thread_runs_arch(void)
58	{	58	{
59	CPU->arch.tss->rsp0 = (__address) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA];	59	CPU->arch.tss->rsp0 = (uintptr_t) &THREAD->kstack[THREAD_STACK_SIZE-SP_DELTA];
60		60
61	/* Syscall support - write address of thread stack pointer to	61	/* Syscall support - write address of thread stack pointer to
62	* hidden part of gs */	62	* hidden part of gs */
63	swapgs();	63	swapgs();
64	write_msr(AMD_MSR_GS, (__u64)&THREAD->kstack);	64	write_msr(AMD_MSR_GS, (uint64_t)&THREAD->kstack);
65	swapgs();	65	swapgs();
66		66
67	/* TLS support - set FS to thread local storage */	67	/* TLS support - set FS to thread local storage */
68	write_msr(AMD_MSR_FS, THREAD->arch.tls);	68	write_msr(AMD_MSR_FS, THREAD->arch.tls);
69		69
70	#ifdef CONFIG_DEBUG_AS_WATCHPOINT	70	#ifdef CONFIG_DEBUG_AS_WATCHPOINT
71	/* Set watchpoint on AS to ensure that nobody sets it to zero */	71	/* Set watchpoint on AS to ensure that nobody sets it to zero */
72	if (CPU->id < BKPOINTS_MAX)	72	if (CPU->id < BKPOINTS_MAX)
73	breakpoint_add(&((the_t *) THREAD->kstack)->as,	73	breakpoint_add(&((the_t *) THREAD->kstack)->as,
74	BKPOINT_WRITE \| BKPOINT_CHECK_ZERO,	74	BKPOINT_WRITE \| BKPOINT_CHECK_ZERO,
75	CPU->id);	75	CPU->id);
76	#endif	76	#endif
77	}	77	}
78		78
79	void after_thread_ran_arch(void)	79	void after_thread_ran_arch(void)
80	{	80	{
81	}	81	}
82		82
83	/** @}	83	/** @}
84	*/	84	*/
85		85
86		86

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/amd64/src/proc/scheduler.c – Rev 1705 → 1780