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The LXR Cross Referencer for SOS

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Differences between /hwcore/irq.h (Article 7.5) and /hwcore/irq.h (Article 6.5)


001 /* Copyright (C) 2004  David Decotigny            001 /* Copyright (C) 2004  David Decotigny
002                                                   002 
003    This program is free software; you can redi    003    This program is free software; you can redistribute it and/or
004    modify it under the terms of the GNU Genera    004    modify it under the terms of the GNU General Public License
005    as published by the Free Software Foundatio    005    as published by the Free Software Foundation; either version 2
006    of the License, or (at your option) any lat    006    of the License, or (at your option) any later version.
007                                                   007    
008    This program is distributed in the hope tha    008    This program is distributed in the hope that it will be useful,
009    but WITHOUT ANY WARRANTY; without even the     009    but WITHOUT ANY WARRANTY; without even the implied warranty of
010    MERCHANTABILITY or FITNESS FOR A PARTICULAR    010    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
011    GNU General Public License for more details    011    GNU General Public License for more details.
012                                                   012    
013    You should have received a copy of the GNU     013    You should have received a copy of the GNU General Public License
014    along with this program; if not, write to t    014    along with this program; if not, write to the Free Software
015    Foundation, Inc., 59 Temple Place - Suite 3    015    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
016    USA.                                           016    USA. 
017 */                                                017 */
018 #ifndef _SOS_HWINTR_H_                            018 #ifndef _SOS_HWINTR_H_
019 #define _SOS_HWINTR_H_                            019 #define _SOS_HWINTR_H_
020                                                   020 
021                                                   021 
022 /**                                               022 /**
023  * @file irq.c                                    023  * @file irq.c
024  *                                                024  *
025  * Hardware interrupts routines management.       025  * Hardware interrupts routines management.
026  */                                               026  */
027                                                   027 
028                                                   028 
029 #include <sos/errno.h>                            029 #include <sos/errno.h>
030 #include "cpu_context.h"                          030 #include "cpu_context.h"
031                                                   031 
032                                                   032 
033 #define sos_save_flags(flags) \                   033 #define sos_save_flags(flags) \
034   asm volatile("pushfl ; popl %0":"=g"(flags):    034   asm volatile("pushfl ; popl %0":"=g"(flags)::"memory")
035 #define sos_restore_flags(flags) \                035 #define sos_restore_flags(flags) \
036   asm volatile("push %0; popfl"::"g"(flags):"m    036   asm volatile("push %0; popfl"::"g"(flags):"memory")
037                                                   037 
038                                                   038 
039 #define sos_disable_IRQs(flags)    \              039 #define sos_disable_IRQs(flags)    \
040   ({ sos_save_flags(flags); asm("cli\n"); })      040   ({ sos_save_flags(flags); asm("cli\n"); })
041 #define sos_restore_IRQs(flags)    \              041 #define sos_restore_IRQs(flags)    \
042   sos_restore_flags(flags)                        042   sos_restore_flags(flags)
043                                                   043 
044                                                   044 
045 /* Usual IRQ levels */                            045 /* Usual IRQ levels */
046 #define SOS_IRQ_TIMER         0                   046 #define SOS_IRQ_TIMER         0
047 #define SOS_IRQ_KEYBOARD      1                   047 #define SOS_IRQ_KEYBOARD      1
048 #define SOS_IRQ_SLAVE_PIC     2                   048 #define SOS_IRQ_SLAVE_PIC     2
049 #define SOS_IRQ_COM2          3                   049 #define SOS_IRQ_COM2          3
050 #define SOS_IRQ_COM1          4                   050 #define SOS_IRQ_COM1          4
051 #define SOS_IRQ_LPT2          5                   051 #define SOS_IRQ_LPT2          5
052 #define SOS_IRQ_FLOPPY        6                   052 #define SOS_IRQ_FLOPPY        6
053 #define SOS_IRQ_LPT1          7                   053 #define SOS_IRQ_LPT1          7
054 #define SOS_IRQ_8_NOT_DEFINED 8                   054 #define SOS_IRQ_8_NOT_DEFINED 8
055 #define SOS_IRQ_RESERVED_1    9                   055 #define SOS_IRQ_RESERVED_1    9
056 #define SOS_IRQ_RESERVED_2    10                  056 #define SOS_IRQ_RESERVED_2    10
057 #define SOS_IRQ_RESERVED_3    11                  057 #define SOS_IRQ_RESERVED_3    11
058 #define SOS_IRQ_RESERVED_4    12                  058 #define SOS_IRQ_RESERVED_4    12
059 #define SOS_IRQ_COPROCESSOR   13                  059 #define SOS_IRQ_COPROCESSOR   13
060 #define SOS_IRQ_HARDDISK      14                  060 #define SOS_IRQ_HARDDISK      14
061 #define SOS_IRQ_RESERVED_5    15                  061 #define SOS_IRQ_RESERVED_5    15
062                                                   062 
063                                                   063 
064 /** Definition of an hardware IRQ handler */      064 /** Definition of an hardware IRQ handler */
065 typedef void (*sos_irq_handler_t)(int irq_leve    065 typedef void (*sos_irq_handler_t)(int irq_level);
066                                                   066 
067                                                   067 
068 /** Setup the PIC */                              068 /** Setup the PIC */
069 sos_ret_t sos_irq_subsystem_setup(void);          069 sos_ret_t sos_irq_subsystem_setup(void);
070                                                   070 
071                                                   071 
072 /**                                               072 /**
073  * If the routine is not NULL, the IDT is setu    073  * If the routine is not NULL, the IDT is setup to call an IRQ
074  * wrapper upon interrupt, which in turn will     074  * wrapper upon interrupt, which in turn will call the routine, and
075  * the PIC is programmed to raise an irq.\ If     075  * the PIC is programmed to raise an irq.\ If the routine is
076  * NULL, we disable the irq line.                 076  * NULL, we disable the irq line.
077  */                                               077  */
078 sos_ret_t sos_irq_set_routine(int irq_level,      078 sos_ret_t sos_irq_set_routine(int irq_level,
079                               sos_irq_handler_    079                               sos_irq_handler_t routine);
080                                                   080 
081 sos_irq_handler_t sos_irq_get_routine(int irq_    081 sos_irq_handler_t sos_irq_get_routine(int irq_level);
082                                                   082 
083                                                   083 
084 /**                                               084 /**
085  * Tell how many nested IRQ handler have been     085  * Tell how many nested IRQ handler have been fired
086  */                                               086  */
087 sos_ui32_t sos_irq_get_nested_level();            087 sos_ui32_t sos_irq_get_nested_level();
088                                                   088 
089                                                   089 
090 /**                                               090 /**
091  * Return TRUE when we are currently executing    091  * Return TRUE when we are currently executing in interrupt context
092  */                                               092  */
093 #define sos_servicing_irq() \                     093 #define sos_servicing_irq() \
094   (sos_irq_get_nested_level() > 0)                094   (sos_irq_get_nested_level() > 0)
095                                                   095 
096                                                   096 
097 #endif /* _SOS_HWINTR_H_ */                       097 #endif /* _SOS_HWINTR_H_ */
                                                      

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