WebSVN – HelenOS – Diff – /branches/network/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>
 
 
/** 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();
}
 
/** @}
 */
 

Rev 2162	Rev 2177
1	/*	1	/*
2	* Copyright (c) 2007 Petr Stepan	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		37
38		38
39	/** Disable interrupts.	39	/** Disable interrupts.
40	*	40	*
41	* @return Old interrupt priority level.	41	* @return Old interrupt priority level.
42	*/	42	*/
43	ipl_t interrupts_disable(void)	43	ipl_t interrupts_disable(void)
44	{	44	{
45	ipl_t ipl = status_reg_read();	45	ipl_t ipl = current_status_reg_read();
46		46
47	status_reg_control_write(ipl & ~status_reg_ie_enabled_bit);	47	current_status_reg_control_write(ipl & ~STATUS_REG_IE_ENABLED_BIT);
48		48
49	return ipl;	49	return ipl;
50	}	50	}
51		51
52	/** Enable interrupts.	52	/** Enable interrupts.
53	*	53	*
54	* @return Old interrupt priority level.	54	* @return Old interrupt priority level.
55	*/	55	*/
56	ipl_t interrupts_enable(void)	56	ipl_t interrupts_enable(void)
57	{	57	{
58	ipl_t ipl = status_reg_read();	58	ipl_t ipl = current_status_reg_read();
59		59
60	status_reg_control_write(ipl \| status_reg_ie_enabled_bit);	60	current_status_reg_control_write(ipl \| STATUS_REG_IE_ENABLED_BIT);
61		61
62	return ipl;	62	return ipl;
63	}	63	}
64		64
65	/** Restore interrupt priority level.	65	/** Restore interrupt priority level.
66	*	66	*
67	* @param ipl Saved interrupt priority level.	67	* @param ipl Saved interrupt priority level.
68	*/	68	*/
69	void interrupts_restore(ipl_t ipl)	69	void interrupts_restore(ipl_t ipl)
70	{	70	{
71	status_reg_control_write(status_reg_read() \| (ipl & status_reg_ie_enabled_bit));	71	current_status_reg_control_write(current_status_reg_read() \|
-		72	(ipl & STATUS_REG_IE_ENABLED_BIT));
72	}	73	}
73		74
74	/** Read interrupt priority level.	75	/** Read interrupt priority level.
75	*	76	*
76	* @return Current interrupt priority level.	77	* @return Current interrupt priority level.
77	*/	78	*/
78	ipl_t interrupts_read(void)	79	ipl_t interrupts_read(void)
79	{	80	{
80	return status_reg_read();	81	return current_status_reg_read();
81	}	82	}
82		83
83	/** @}	84	/** @}
84	*/	85	*/
85		86

Subversion Repositories HelenOS

(root)/branches/network/kernel/arch/arm32/src/interrupt.c @ 4718 – Rev 2162 → 2177