WebSVN – HelenOS – Diff – /branches/arm/kernel/arch/arm32/src/interrupt.c


/*
 * Copyright (c) 2007 Petr Stepan
 * 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 arm32
 * @{
 */
/** @file
 */
 
#include <arch/asm.h>
#include <arch/regutils.h>
#include <ddi/irq.h>
#include <arch/drivers/gxemul.h>
#include <interrupt.h>
 
 
#define IRQ_COUNT 8
 
 
/** Disable interrupts.
 *
 * @return Old interrupt priority level.
 */
ipl_t interrupts_disable(void)
{
    ipl_t ipl = current_status_reg_read();
 
    current_status_reg_control_write(ipl & ~STATUS_REG_IE_ENABLED_BIT);
   
    return ipl;
}
 
/** Enable interrupts.
 *
 * @return Old interrupt priority level.
 */
ipl_t interrupts_enable(void)
{
    ipl_t ipl = current_status_reg_read();
 
    current_status_reg_control_write(ipl | STATUS_REG_IE_ENABLED_BIT);
 
    return ipl;
}
 
/** Restore interrupt priority level.
 *
 * @param ipl Saved interrupt priority level.
 */
void interrupts_restore(ipl_t ipl)
{
    current_status_reg_control_write(current_status_reg_read() |
            (ipl & STATUS_REG_IE_ENABLED_BIT));
}
 
/** Read interrupt priority level.
 *
 * @return Current interrupt priority level.
 */
ipl_t interrupts_read(void)
{
    return current_status_reg_read();
}
 
/** Initialize basic tables for exception dispatching
 * and starts the timer.
 */
void interrupt_init(void)
{
    irq_init(IRQ_COUNT, IRQ_COUNT);
 
    gxemul_timer_irq_init();
    gxemul_timer_start(GXEMUL_TIMER_FREQ);
}
 
 
/** @}
 */
 

Subversion Repositories HelenOS

(root)/branches/arm/kernel/arch/arm32/src/interrupt.c @ 4346 – Rev 2214 → 2245

Rev 2214		Rev 2245
1	/*	1	/*
2	* Copyright (c) 2007 Petr Stepan, Michal Kebrt	2	* Copyright (c) 2007 Petr Stepan
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 arm32	29	/** @addtogroup arm32
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#include <arch/asm.h>	35	#include <arch/asm.h>
36	#include <arch/regutils.h>	36	#include <arch/regutils.h>
-		37	#include <ddi/irq.h>
-		38	#include <arch/drivers/gxemul.h>
37	#include <interrupt.h>	39	#include <interrupt.h>
38		40
39		-
40	#define IRQ_COUNT 8	41	#define IRQ_COUNT 8
41		42
42		43
43	/** Disable interrupts.	44	/** Disable interrupts.
44	*	45	*
45	* @return Old interrupt priority level.	46	* @return Old interrupt priority level.
46	*/	47	*/
47	ipl_t interrupts_disable(void)	48	ipl_t interrupts_disable(void)
48	{	49	{
49	ipl_t ipl = current_status_reg_read();	50	ipl_t ipl = current_status_reg_read();
50		51
51	current_status_reg_control_write(ipl & ~STATUS_REG_IE_ENABLED_BIT);	52	current_status_reg_control_write(ipl & ~STATUS_REG_IE_ENABLED_BIT);
52		53
53	return ipl;	54	return ipl;
54	}	55	}
55		56
56	/** Enable interrupts.	57	/** Enable interrupts.
57	*	58	*
58	* @return Old interrupt priority level.	59	* @return Old interrupt priority level.
59	*/	60	*/
60	ipl_t interrupts_enable(void)	61	ipl_t interrupts_enable(void)
61	{	62	{
62	ipl_t ipl = current_status_reg_read();	63	ipl_t ipl = current_status_reg_read();
63		64
64	current_status_reg_control_write(ipl \| STATUS_REG_IE_ENABLED_BIT);	65	current_status_reg_control_write(ipl \| STATUS_REG_IE_ENABLED_BIT);
65		66
66	return ipl;	67	return ipl;
67	}	68	}
68		69
69	/** Restore interrupt priority level.	70	/** Restore interrupt priority level.
70	*	71	*
71	* @param ipl Saved interrupt priority level.	72	* @param ipl Saved interrupt priority level.
72	*/	73	*/
73	void interrupts_restore(ipl_t ipl)	74	void interrupts_restore(ipl_t ipl)
74	{	75	{
75	current_status_reg_control_write(current_status_reg_read() \|	76	current_status_reg_control_write(current_status_reg_read() \|
76	(ipl & STATUS_REG_IE_ENABLED_BIT));	77	(ipl & STATUS_REG_IE_ENABLED_BIT));
77	}	78	}
78		79
79	/** Read interrupt priority level.	80	/** Read interrupt priority level.
80	*	81	*
81	* @return Current interrupt priority level.	82	* @return Current interrupt priority level.
82	*/	83	*/
83	ipl_t interrupts_read(void)	84	ipl_t interrupts_read(void)
84	{	85	{
85	return current_status_reg_read();	86	return current_status_reg_read();
86	}	87	}
87		88
-		89	/** Initialize basic tables for exception dispatching
-		90	* and starts the timer.
-		91	*/
88	void interrupt_init(void) {	92	void interrupt_init(void)
-		93	{
89	irq_init(IRQ_COUNT, IRQ_COUNT);	94	irq_init(IRQ_COUNT, IRQ_COUNT);
-		95
-		96	gxemul_timer_irq_init();
-		97	gxemul_timer_start(GXEMUL_TIMER_FREQ);
90	}	98	}
91		99
-		100
92	/** @}	101	/** @}
93	*/	102	*/
94		103