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001 /* Copyright (C) 2004 David Decotigny 001 /* Copyright (C) 2004 David Decotigny >> 002 Copyright (C) 1999 Free Software Foundation, Inc. 002 003 003 This program is free software; you can redi 004 This program is free software; you can redistribute it and/or 004 modify it under the terms of the GNU Genera 005 modify it under the terms of the GNU General Public License 005 as published by the Free Software Foundatio 006 as published by the Free Software Foundation; either version 2 006 of the License, or (at your option) any lat 007 of the License, or (at your option) any later version. 007 008 008 This program is distributed in the hope tha 009 This program is distributed in the hope that it will be useful, 009 but WITHOUT ANY WARRANTY; without even the 010 but WITHOUT ANY WARRANTY; without even the implied warranty of 010 MERCHANTABILITY or FITNESS FOR A PARTICULAR 011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 011 GNU General Public License for more details 012 GNU General Public License for more details. 012 013 013 You should have received a copy of the GNU 014 You should have received a copy of the GNU General Public License 014 along with this program; if not, write to t 015 along with this program; if not, write to the Free Software 015 Foundation, Inc., 59 Temple Place - Suite 3 016 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 016 USA. 017 USA. 017 */ 018 */ 018 #ifndef _SOS_HWINTR_H_ 019 #ifndef _SOS_HWINTR_H_ 019 #define _SOS_HWINTR_H_ 020 #define _SOS_HWINTR_H_ 020 021 021 022 022 /** 023 /** 023 * @file irq.c 024 * @file irq.c 024 * 025 * 025 * Hardware interrupts routines management. 026 * Hardware interrupts routines management. 026 */ 027 */ 027 028 028 029 029 #include <sos/errno.h> 030 #include <sos/errno.h> 030 #include "cpu_context.h" 031 #include "cpu_context.h" 031 032 032 033 033 #define sos_save_flags(flags) \ 034 #define sos_save_flags(flags) \ 034 asm volatile("pushfl ; popl %0":"=g"(flags): 035 asm volatile("pushfl ; popl %0":"=g"(flags)::"memory") 035 #define sos_restore_flags(flags) \ 036 #define sos_restore_flags(flags) \ 036 asm volatile("push %0; popfl"::"g"(flags):"m 037 asm volatile("push %0; popfl"::"g"(flags):"memory") 037 038 038 039 039 #define sos_disable_IRQs(flags) \ 040 #define sos_disable_IRQs(flags) \ 040 ({ sos_save_flags(flags); asm("cli\n"); }) 041 ({ sos_save_flags(flags); asm("cli\n"); }) 041 #define sos_restore_IRQs(flags) \ 042 #define sos_restore_IRQs(flags) \ 042 sos_restore_flags(flags) 043 sos_restore_flags(flags) 043 044 044 045 045 /* Usual IRQ levels */ 046 /* Usual IRQ levels */ 046 #define SOS_IRQ_TIMER 0 047 #define SOS_IRQ_TIMER 0 047 #define SOS_IRQ_KEYBOARD 1 048 #define SOS_IRQ_KEYBOARD 1 048 #define SOS_IRQ_SLAVE_PIC 2 049 #define SOS_IRQ_SLAVE_PIC 2 049 #define SOS_IRQ_COM2 3 050 #define SOS_IRQ_COM2 3 050 #define SOS_IRQ_COM1 4 051 #define SOS_IRQ_COM1 4 051 #define SOS_IRQ_LPT2 5 052 #define SOS_IRQ_LPT2 5 052 #define SOS_IRQ_FLOPPY 6 053 #define SOS_IRQ_FLOPPY 6 053 #define SOS_IRQ_LPT1 7 054 #define SOS_IRQ_LPT1 7 054 #define SOS_IRQ_8_NOT_DEFINED 8 055 #define SOS_IRQ_8_NOT_DEFINED 8 055 #define SOS_IRQ_RESERVED_1 9 056 #define SOS_IRQ_RESERVED_1 9 056 #define SOS_IRQ_RESERVED_2 10 057 #define SOS_IRQ_RESERVED_2 10 057 #define SOS_IRQ_RESERVED_3 11 058 #define SOS_IRQ_RESERVED_3 11 058 #define SOS_IRQ_RESERVED_4 12 059 #define SOS_IRQ_RESERVED_4 12 059 #define SOS_IRQ_COPROCESSOR 13 060 #define SOS_IRQ_COPROCESSOR 13 060 #define SOS_IRQ_HARDDISK 14 061 #define SOS_IRQ_HARDDISK 14 061 #define SOS_IRQ_RESERVED_5 15 062 #define SOS_IRQ_RESERVED_5 15 062 063 063 064 064 /** Definition of an hardware IRQ handler */ 065 /** Definition of an hardware IRQ handler */ 065 typedef void (*sos_irq_handler_t)(int irq_leve !! 066 typedef void (*sos_irq_handler_t)(int irq_level, >> 067 const struct sos_cpu_kstate *cpu_kstate); 066 068 067 069 068 /** Setup the PIC */ 070 /** Setup the PIC */ 069 sos_ret_t sos_irq_subsystem_setup(void); 071 sos_ret_t sos_irq_subsystem_setup(void); 070 072 071 073 072 /** 074 /** 073 * If the routine is not NULL, the IDT is setu 075 * If the routine is not NULL, the IDT is setup to call an IRQ 074 * wrapper upon interrupt, which in turn will 076 * wrapper upon interrupt, which in turn will call the routine, and 075 * the PIC is programmed to raise an irq.\ If 077 * the PIC is programmed to raise an irq.\ If the routine is 076 * NULL, we disable the irq line. 078 * NULL, we disable the irq line. 077 */ 079 */ 078 sos_ret_t sos_irq_set_routine(int irq_level, 080 sos_ret_t sos_irq_set_routine(int irq_level, 079 sos_irq_handler_ 081 sos_irq_handler_t routine); 080 082 081 sos_irq_handler_t sos_irq_get_routine(int irq_ 083 sos_irq_handler_t sos_irq_get_routine(int irq_level); 082 084 083 085 084 /** 086 /** 085 * Tell how many nested IRQ handler have been 087 * Tell how many nested IRQ handler have been fired 086 */ 088 */ 087 sos_ui32_t sos_irq_get_nested_level(); 089 sos_ui32_t sos_irq_get_nested_level(); 088 090 089 091 090 /** 092 /** 091 * Return TRUE when we are currently executing 093 * Return TRUE when we are currently executing in interrupt context 092 */ 094 */ 093 #define sos_servicing_irq() \ 095 #define sos_servicing_irq() \ 094 (sos_irq_get_nested_level() > 0) 096 (sos_irq_get_nested_level() > 0) 095 097 096 098 097 #endif /* _SOS_HWINTR_H_ */ 099 #endif /* _SOS_HWINTR_H_ */
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