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The LXR Cross Referencer for SOS

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001 /* Copyright (C) 2004  David Decotigny
002    Copyright (C) 1999  Free Software Foundation, Inc.
003 
004    This program is free software; you can redistribute it and/or
005    modify it under the terms of the GNU General Public License
006    as published by the Free Software Foundation; either version 2
007    of the License, or (at your option) any later version.
008    
009    This program is distributed in the hope that it will be useful,
010    but WITHOUT ANY WARRANTY; without even the implied warranty of
011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
012    GNU General Public License for more details.
013    
014    You should have received a copy of the GNU General Public License
015    along with this program; if not, write to the Free Software
016    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
017    USA. 
018 */
019 #ifndef _SOS_HWINTR_H_
020 #define _SOS_HWINTR_H_
021 
022 /**
023  * @file irq.c
024  *
025  * Hardware interrupts routines management.
026  */
027 
028 #include <sos/errno.h>
029 
030 #define sos_save_flags(flags) \
031   asm volatile("pushfl ; popl %0":"=g"(flags)::"memory")
032 #define sos_restore_flags(flags) \
033   asm volatile("push %0; popfl"::"g"(flags):"memory")
034 
035 #define sos_disable_IRQs(flags)    \
036   ({ sos_save_flags(flags); asm("cli\n"); })
037 #define sos_restore_IRQs(flags)    \
038   sos_restore_flags(flags)
039 
040 /* Usual IRQ levels */
041 #define SOS_IRQ_TIMER         0
042 #define SOS_IRQ_KEYBOARD      1
043 #define SOS_IRQ_SLAVE_PIC     2
044 #define SOS_IRQ_COM2          3
045 #define SOS_IRQ_COM1          4
046 #define SOS_IRQ_LPT2          5
047 #define SOS_IRQ_FLOPPY        6
048 #define SOS_IRQ_LPT1          7
049 #define SOS_IRQ_8_NOT_DEFINED 8
050 #define SOS_IRQ_RESERVED_1    9
051 #define SOS_IRQ_RESERVED_2    10
052 #define SOS_IRQ_RESERVED_3    11
053 #define SOS_IRQ_RESERVED_4    12
054 #define SOS_IRQ_COPROCESSOR   13
055 #define SOS_IRQ_HARDDISK      14
056 #define SOS_IRQ_RESERVED_5    15
057 
058 typedef void (*sos_irq_handler_t)(int irq_level);
059 
060 /** Setup the PIC */
061 sos_ret_t sos_irq_setup(void);
062 
063 /**
064  * If the routine is not NULL, the IDT is setup to call an IRQ
065  * wrapper upon interrupt, which in turn will call the routine, and
066  * the PIC is programmed to raise an irq.\ If the routine is
067  * NULL, we disable the irq line.
068  */
069 sos_ret_t sos_irq_set_routine(int irq_level,
070                               sos_irq_handler_t routine);
071 
072 sos_irq_handler_t sos_irq_get_routine(int irq_level);
073 
074 #endif /* _SOS_HWINTR_H_ */

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