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The LXR Cross Referencer for SOS

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Differences between /hwcore/irq.c (Article 5) and /hwcore/irq.c (Article 9)


001 /* Copyright (C) 2004  David Decotigny            001 /* Copyright (C) 2004  David Decotigny
002    Copyright (C) 1999  Free Software Foundatio << 
003                                                   002 
004    This program is free software; you can redi    003    This program is free software; you can redistribute it and/or
005    modify it under the terms of the GNU Genera    004    modify it under the terms of the GNU General Public License
006    as published by the Free Software Foundatio    005    as published by the Free Software Foundation; either version 2
007    of the License, or (at your option) any lat    006    of the License, or (at your option) any later version.
008                                                   007    
009    This program is distributed in the hope tha    008    This program is distributed in the hope that it will be useful,
010    but WITHOUT ANY WARRANTY; without even the     009    but WITHOUT ANY WARRANTY; without even the implied warranty of
011    MERCHANTABILITY or FITNESS FOR A PARTICULAR    010    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
012    GNU General Public License for more details    011    GNU General Public License for more details.
013                                                   012    
014    You should have received a copy of the GNU     013    You should have received a copy of the GNU General Public License
015    along with this program; if not, write to t    014    along with this program; if not, write to the Free Software
016    Foundation, Inc., 59 Temple Place - Suite 3    015    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
017    USA.                                           016    USA. 
018 */                                                017 */
019 #include "idt.h"                                  018 #include "idt.h"
020 #include "i8259.h"                                019 #include "i8259.h"
021                                                   020 
022 #include "irq.h"                                  021 #include "irq.h"
023                                                   022 
024 /* array of IRQ wrappers, defined in irq_wrapp !! 023 /** array of IRQ wrappers, defined in irq_wrappers.S */
025 extern sos_vaddr_t sos_irq_wrapper_array[SOS_I    024 extern sos_vaddr_t sos_irq_wrapper_array[SOS_IRQ_NUM];
026                                                   025 
027 /* arrays of IRQ handlers, shared with irq_wra !! 026 /** arrays of IRQ handlers, shared with irq_wrappers.S */
028 sos_irq_handler_t sos_irq_handler_array[SOS_IR    027 sos_irq_handler_t sos_irq_handler_array[SOS_IRQ_NUM] = { NULL, };
029                                                   028 
                                                   >> 029 /** Number of interrupt handlers that are currently executing */
                                                   >> 030 sos_ui32_t sos_irq_nested_level_counter;
030                                                   031 
031 sos_ret_t sos_irq_setup(void)                  !! 032 sos_ret_t sos_irq_subsystem_setup(void)
032 {                                                 033 {
033   return sos_i8259_setup();                    !! 034   sos_irq_nested_level_counter = 0;
                                                   >> 035   return sos_i8259_subsystem_setup();
034 }                                                 036 }
035                                                   037 
036                                                   038 
037 sos_ret_t sos_irq_set_routine(int irq_level,      039 sos_ret_t sos_irq_set_routine(int irq_level,
038                               sos_irq_handler_    040                               sos_irq_handler_t routine)
039 {                                                 041 {
040   sos_ret_t retval;                               042   sos_ret_t retval;
041   sos_ui32_t flags;                               043   sos_ui32_t flags;
042                                                   044   
043   if ((irq_level < 0) || (irq_level >= SOS_IRQ    045   if ((irq_level < 0) || (irq_level >= SOS_IRQ_NUM))
044     return -SOS_EINVAL;                           046     return -SOS_EINVAL;
045                                                   047   
046   sos_disable_IRQs(flags);                        048   sos_disable_IRQs(flags);
047                                                   049 
048   retval = SOS_OK;                                050   retval = SOS_OK;
049                                                   051 
050   /* Set the irq routine to be called by the I    052   /* Set the irq routine to be called by the IRQ wrapper */
051   sos_irq_handler_array[irq_level] = routine;     053   sos_irq_handler_array[irq_level] = routine;
052                                                   054 
053   /* If the irq is to be enabled, update the I    055   /* If the irq is to be enabled, update the IDT with the IRQ
054      wrapper */                                   056      wrapper */
055   if (routine != NULL)                            057   if (routine != NULL)
056     {                                             058     {
057       retval                                      059       retval
058         = sos_idt_set_handler(SOS_IRQ_BASE + i    060         = sos_idt_set_handler(SOS_IRQ_BASE + irq_level,
059                               (sos_vaddr_t) so    061                               (sos_vaddr_t) sos_irq_wrapper_array[irq_level],
060                               0 /* CPL0 routin    062                               0 /* CPL0 routine */);
061       /* A problem occured */                     063       /* A problem occured */
062       if (retval != SOS_OK)                       064       if (retval != SOS_OK)
063         sos_irq_handler_array[irq_level] = NUL    065         sos_irq_handler_array[irq_level] = NULL;
064     }                                             066     }
065   else /* Disable this idt entry */               067   else /* Disable this idt entry */
066     {                                             068     {
067       retval                                      069       retval
068         = sos_idt_set_handler(SOS_IRQ_BASE + i    070         = sos_idt_set_handler(SOS_IRQ_BASE + irq_level,
069                               (sos_vaddr_t)NUL    071                               (sos_vaddr_t)NULL /* Disable IDTE */,
070                               0  /* Don't care    072                               0  /* Don't care */);
071     }                                             073     }
072                                                   074 
073   /* Update the PIC only if an IRQ handler has    075   /* Update the PIC only if an IRQ handler has been set */
074   if (sos_irq_handler_array[irq_level] != NULL    076   if (sos_irq_handler_array[irq_level] != NULL)
075     sos_i8259_enable_irq_line(irq_level);         077     sos_i8259_enable_irq_line(irq_level);
076   else                                            078   else
077     sos_i8259_disable_irq_line(irq_level);        079     sos_i8259_disable_irq_line(irq_level);
078                                                   080     
079   sos_restore_IRQs(flags);                        081   sos_restore_IRQs(flags);
080   return retval;                                  082   return retval;
081 }                                                 083 }
082                                                   084 
083                                                   085 
084 sos_irq_handler_t sos_irq_get_routine(int irq_    086 sos_irq_handler_t sos_irq_get_routine(int irq_level)
085 {                                                 087 {
086   if ((irq_level < 0) || (irq_level >= SOS_IRQ    088   if ((irq_level < 0) || (irq_level >= SOS_IRQ_NUM))
087     return NULL;                                  089     return NULL;
088                                                   090   
089   /* Expected to be atomic */                     091   /* Expected to be atomic */
090   return sos_irq_handler_array[irq_level];        092   return sos_irq_handler_array[irq_level];
                                                   >> 093 }
                                                   >> 094 
                                                   >> 095 
                                                   >> 096 sos_ui32_t sos_irq_get_nested_level()
                                                   >> 097 {
                                                   >> 098   /* No need to disable interrupts here */
                                                   >> 099   return sos_irq_nested_level_counter;
091 }                                                 100 }
                                                      

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