| 1 | /* |
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| 2 | * __do_interrupt.c - first stage interrupt handler |
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| 3 | * |
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| 4 | * Copyright (c) 2008,2009,2010,2011,2012 Ghassan Almaless |
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| 5 | * Copyright (c) 2011,2012 UPMC Sorbonne Universites |
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| 6 | * |
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| 7 | * This file is part of ALMOS-kernel. |
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| 8 | * |
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| 9 | * ALMOS-kernel is free software; you can redistribute it and/or modify it |
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| 10 | * under the terms of the GNU General Public License as published by |
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| 11 | * the Free Software Foundation; version 2.0 of the License. |
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| 12 | * |
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| 13 | * ALMOS-kernel is distributed in the hope that it will be useful, but |
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| 14 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 16 | * General Public License for more details. |
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| 17 | * |
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| 18 | * You should have received a copy of the GNU General Public License |
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| 19 | * along with ALMOS-kernel; if not, write to the Free Software Foundation, |
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| 20 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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| 21 | */ |
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| 22 | |
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| 23 | #include <types.h> |
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| 24 | #include <kdmsg.h> |
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| 25 | #include <chdev.h> |
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| 26 | #include <interrupt.h> |
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| 27 | #include <thread.h> |
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| 28 | #include <cpu-internal.h> |
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| 29 | #include <pic.h> |
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| 30 | #include <cpu.h> |
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| 31 | #include <cpu-io.h> |
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| 32 | |
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| 33 | extern int __do_syscall (unsigned arg0, |
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| 34 | unsigned arg1, |
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| 35 | unsigned arg2, |
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| 36 | unsigned arg3, |
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| 37 | unsigned service_num, |
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| 38 | int *errno); |
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| 39 | |
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| 40 | void __do_interrupt(struct cpu_regs_s *regs) |
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| 41 | { |
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| 42 | register uint_t irq = regs->int_nr; |
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| 43 | int err; |
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| 44 | |
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| 45 | #if 0 |
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| 46 | isr_dmsg(DEBUG, "DEBUG: IRQ %d has been recived\n", irq); |
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| 47 | #endif |
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| 48 | |
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| 49 | if(irq > PIC_IRQ_MAX) |
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| 50 | PANIC("Interrupt %d", irq); |
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| 51 | else |
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| 52 | { |
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| 53 | if(irq == PIC_IRQ_MAX) |
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| 54 | { |
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| 55 | #if 0 |
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| 56 | isr_dmsg(DEBUG, "DEBUG:syscall: %x, %x, %x, %x #%d\n", |
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| 57 | regs->ebx, regs->ecx, regs->edx, regs->edi, regs->eax); |
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| 58 | #endif |
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| 59 | err = 0; |
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| 60 | regs->eax = __do_syscall(regs->ebx, regs->ecx, regs->edx, regs->edi, regs->eax, &err); |
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| 61 | regs->esi = err; |
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| 62 | return; |
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| 63 | } |
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| 64 | |
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| 65 | //isr_dmsg(DEBUG, "DEBUG: [ irq %d ], thread %x\n",irq,CURRENT_THREAD); |
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| 66 | do_interrupt(CURRENT_THREAD, irq); |
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| 67 | |
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| 68 | if(irq < 8) |
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| 69 | cpu_io_out8(0x20, 0x20); |
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| 70 | else |
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| 71 | if(irq < 16) |
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| 72 | cpu_io_out8(0xA0, 0x20); |
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| 73 | } |
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| 74 | } |
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