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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 * @file irq.c 023 * @file irq.c 024 * 024 * 025 * Hardware interrupts routines management. 025 * Hardware interrupts routines management. 026 */ 026 */ 027 027 028 << 029 #include <sos/errno.h> 028 #include <sos/errno.h> 030 #include "cpu_context.h" << 031 << 032 029 033 #define sos_save_flags(flags) \ 030 #define sos_save_flags(flags) \ 034 asm volatile("pushfl ; popl %0":"=g"(flags): 031 asm volatile("pushfl ; popl %0":"=g"(flags)::"memory") 035 #define sos_restore_flags(flags) \ 032 #define sos_restore_flags(flags) \ 036 asm volatile("push %0; popfl"::"g"(flags):"m 033 asm volatile("push %0; popfl"::"g"(flags):"memory") 037 034 038 << 039 #define sos_disable_IRQs(flags) \ 035 #define sos_disable_IRQs(flags) \ 040 ({ sos_save_flags(flags); asm("cli\n"); }) 036 ({ sos_save_flags(flags); asm("cli\n"); }) 041 #define sos_restore_IRQs(flags) \ 037 #define sos_restore_IRQs(flags) \ 042 sos_restore_flags(flags) 038 sos_restore_flags(flags) 043 039 044 << 045 /* Usual IRQ levels */ 040 /* Usual IRQ levels */ 046 #define SOS_IRQ_TIMER 0 041 #define SOS_IRQ_TIMER 0 047 #define SOS_IRQ_KEYBOARD 1 042 #define SOS_IRQ_KEYBOARD 1 048 #define SOS_IRQ_SLAVE_PIC 2 043 #define SOS_IRQ_SLAVE_PIC 2 049 #define SOS_IRQ_COM2 3 044 #define SOS_IRQ_COM2 3 050 #define SOS_IRQ_COM1 4 045 #define SOS_IRQ_COM1 4 051 #define SOS_IRQ_LPT2 5 046 #define SOS_IRQ_LPT2 5 052 #define SOS_IRQ_FLOPPY 6 047 #define SOS_IRQ_FLOPPY 6 053 #define SOS_IRQ_LPT1 7 048 #define SOS_IRQ_LPT1 7 054 #define SOS_IRQ_8_NOT_DEFINED 8 049 #define SOS_IRQ_8_NOT_DEFINED 8 055 #define SOS_IRQ_RESERVED_1 9 050 #define SOS_IRQ_RESERVED_1 9 056 #define SOS_IRQ_RESERVED_2 10 051 #define SOS_IRQ_RESERVED_2 10 057 #define SOS_IRQ_RESERVED_3 11 052 #define SOS_IRQ_RESERVED_3 11 058 #define SOS_IRQ_RESERVED_4 12 053 #define SOS_IRQ_RESERVED_4 12 059 #define SOS_IRQ_COPROCESSOR 13 054 #define SOS_IRQ_COPROCESSOR 13 060 #define SOS_IRQ_HARDDISK 14 055 #define SOS_IRQ_HARDDISK 14 061 #define SOS_IRQ_RESERVED_5 15 056 #define SOS_IRQ_RESERVED_5 15 062 057 063 << 064 /** Definition of an hardware IRQ handler */ << 065 typedef void (*sos_irq_handler_t)(int irq_leve 058 typedef void (*sos_irq_handler_t)(int irq_level); 066 059 067 << 068 /** Setup the PIC */ 060 /** Setup the PIC */ 069 sos_ret_t sos_irq_subsystem_setup(void); !! 061 sos_ret_t sos_irq_setup(void); 070 << 071 062 072 /** 063 /** 073 * If the routine is not NULL, the IDT is setu 064 * If the routine is not NULL, the IDT is setup to call an IRQ 074 * wrapper upon interrupt, which in turn will 065 * wrapper upon interrupt, which in turn will call the routine, and 075 * the PIC is programmed to raise an irq.\ If 066 * the PIC is programmed to raise an irq.\ If the routine is 076 * NULL, we disable the irq line. 067 * NULL, we disable the irq line. 077 */ 068 */ 078 sos_ret_t sos_irq_set_routine(int irq_level, 069 sos_ret_t sos_irq_set_routine(int irq_level, 079 sos_irq_handler_ 070 sos_irq_handler_t routine); 080 071 081 sos_irq_handler_t sos_irq_get_routine(int irq_ 072 sos_irq_handler_t sos_irq_get_routine(int irq_level); 082 << 083 << 084 /** << 085 * Tell how many nested IRQ handler have been << 086 */ << 087 sos_ui32_t sos_irq_get_nested_level(); << 088 << 089 << 090 /** << 091 * Return TRUE when we are currently executing << 092 */ << 093 #define sos_servicing_irq() \ << 094 (sos_irq_get_nested_level() > 0) << 095 << 096 073 097 #endif /* _SOS_HWINTR_H_ */ 074 #endif /* _SOS_HWINTR_H_ */
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