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


/*
 * Copyright (c) 2007 Petr Stepan, Michal Kebrt
 * 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 <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();
}
 
void interrupt_init(void) {
    irq_init(IRQ_COUNT, IRQ_COUNT);
}
 
/** @}
 */
 

Subversion Repositories HelenOS

(root)/branches/arm/kernel/arch/arm32/src/interrupt.c – Rev 2177 → 2214

Rev 2177		Rev 2214
1	/*	1	/*
2	* Copyright (c) 2007 Petr Stepan	2	* Copyright (c) 2007 Petr Stepan, Michal Kebrt
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 <interrupt.h>
-		38
-		39
-		40	#define IRQ_COUNT 8
37		41
38		42
39	/** Disable interrupts.	43	/** Disable interrupts.
40	*	44	*
41	* @return Old interrupt priority level.	45	* @return Old interrupt priority level.
42	*/	46	*/
43	ipl_t interrupts_disable(void)	47	ipl_t interrupts_disable(void)
44	{	48	{
45	ipl_t ipl = current_status_reg_read();	49	ipl_t ipl = current_status_reg_read();
46		50
47	current_status_reg_control_write(ipl & ~STATUS_REG_IE_ENABLED_BIT);	51	current_status_reg_control_write(ipl & ~STATUS_REG_IE_ENABLED_BIT);
48		52
49	return ipl;	53	return ipl;
50	}	54	}
51		55
52	/** Enable interrupts.	56	/** Enable interrupts.
53	*	57	*
54	* @return Old interrupt priority level.	58	* @return Old interrupt priority level.
55	*/	59	*/
56	ipl_t interrupts_enable(void)	60	ipl_t interrupts_enable(void)
57	{	61	{
58	ipl_t ipl = current_status_reg_read();	62	ipl_t ipl = current_status_reg_read();
59		63
60	current_status_reg_control_write(ipl \| STATUS_REG_IE_ENABLED_BIT);	64	current_status_reg_control_write(ipl \| STATUS_REG_IE_ENABLED_BIT);
61		65
62	return ipl;	66	return ipl;
63	}	67	}
64		68
65	/** Restore interrupt priority level.	69	/** Restore interrupt priority level.
66	*	70	*
67	* @param ipl Saved interrupt priority level.	71	* @param ipl Saved interrupt priority level.
68	*/	72	*/
69	void interrupts_restore(ipl_t ipl)	73	void interrupts_restore(ipl_t ipl)
70	{	74	{
71	current_status_reg_control_write(current_status_reg_read() \|	75	current_status_reg_control_write(current_status_reg_read() \|
72	(ipl & STATUS_REG_IE_ENABLED_BIT));	76	(ipl & STATUS_REG_IE_ENABLED_BIT));
73	}	77	}
74		78
75	/** Read interrupt priority level.	79	/** Read interrupt priority level.
76	*	80	*
77	* @return Current interrupt priority level.	81	* @return Current interrupt priority level.
78	*/	82	*/
79	ipl_t interrupts_read(void)	83	ipl_t interrupts_read(void)
80	{	84	{
81	return current_status_reg_read();	85	return current_status_reg_read();
82	}	86	}
-		87
-		88	void interrupt_init(void) {
-		89	irq_init(IRQ_COUNT, IRQ_COUNT);
-		90	}
83		91
84	/** @}	92	/** @}
85	*/	93	*/
86		94