| 1 | /* $Id: irq.c 142 2000-04-23 14:55:46Z ktk $ */
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| 2 |
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| 3 | //******************************************************************************
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| 4 | // OS/2 implementation of Linux irq kernel services
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| 5 | //
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| 6 | // Copyright 2000 Sander van Leeuwen (sandervl@xs4all.nl)
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| 7 | //
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| 8 | // This program is free software; you can redistribute it and/or
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| 9 | // modify it under the terms of the GNU General Public License as
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| 10 | // published by the Free Software Foundation; either version 2 of
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| 11 | // the License, or (at your option) any later version.
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| 12 | //
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| 13 | // This program is distributed in the hope that it will be useful,
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| 14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 16 | // GNU 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
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| 19 | // License along with this program; if not, write to the Free
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| 20 | // Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
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| 21 | // USA.
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| 22 | //
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| 23 | //******************************************************************************
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| 24 | #define INCL_NOPMAPI
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| 25 | #define INCL_DOSERRORS // for ERROR_INVALID_FUNCTION
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| 26 | #include <os2.h>
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| 27 | #include <ossidc.h>
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| 28 | #include "irqos2.h"
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| 29 |
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| 30 | unsigned long volatile jiffies = 0;
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| 31 |
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| 32 | static IRQHANDLER_INFO irqHandlers[MAX_IRQS][MAX_SHAREDIRQS] = {0};
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| 33 | static ULONG nrIrqHandlers[MAX_IRQS] = {0};
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| 34 | static ULONG eoiIrq[MAX_IRQS] = {0};
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| 35 |
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| 36 | //******************************************************************************
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| 37 | //******************************************************************************
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| 38 | int request_irq(unsigned int irq,
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| 39 | void (*handler)(int, void *, void *),
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| 40 | unsigned long x0, const char *x1, void *x2)
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| 41 | {
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| 42 | int i;
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| 43 | if(irq > 0xF)
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| 44 | return 0;
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| 45 |
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| 46 | for(i=0;i<MAX_SHAREDIRQS;i++) {
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| 47 | if(irqHandlers[irq][i].handler == 0) {
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| 48 | irqHandlers[irq][i].handler = handler;
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| 49 | irqHandlers[irq][i].x0 = x0;
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| 50 | irqHandlers[irq][i].x1 = (char *)x1;
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| 51 | irqHandlers[irq][i].x2 = x2;
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| 52 | nrIrqHandlers[irq]++;
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| 53 | if(OSS32_SetIrq(irq, (ULONG)&oss_process_interrupt) == FALSE) {
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| 54 | break;
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| 55 | }
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| 56 | return 0;
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| 57 | }
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| 58 | }
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| 59 | dprintf(("request_irq: Unable to register irq handler for irq %d\n", irq));
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| 60 | return 1;
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| 61 | }
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| 62 | //******************************************************************************
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| 63 | //******************************************************************************
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| 64 | void free_irq(unsigned int irq, void *userdata)
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| 65 | {
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| 66 | int i;
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| 67 | for(i=0;i<MAX_SHAREDIRQS;i++) {
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| 68 | if(irqHandlers[irq][i].x2 == userdata) {
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| 69 | irqHandlers[irq][i].handler = 0;
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| 70 | irqHandlers[irq][i].x0 = 0;
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| 71 | irqHandlers[irq][i].x1 = 0;
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| 72 | irqHandlers[irq][i].x2 = 0;
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| 73 | if(--nrIrqHandlers[irq] == 0) {
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| 74 | OSS32_FreeIrq(irq);
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| 75 | }
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| 76 | break;
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| 77 | }
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| 78 | }
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| 79 | }
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| 80 | //******************************************************************************
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| 81 | //******************************************************************************
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| 82 | void eoi_irq(unsigned int irq)
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| 83 | {
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| 84 | if(irq > 0xf) {
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| 85 | DebugInt3();
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| 86 | return;
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| 87 | }
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| 88 | eoiIrq[irq]++;
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| 89 | }
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| 90 | //******************************************************************************
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| 91 | //******************************************************************************
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| 92 | BOOL _cdecl oss_process_interrupt(int irq)
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| 93 | {
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| 94 | BOOL rc;
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| 95 | int i;
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| 96 | for(i=0;i<MAX_SHAREDIRQS;i++) {
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| 97 | if(irqHandlers[irq][i].handler != 0) {
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| 98 | irqHandlers[irq][i].handler(irq, irqHandlers[irq][i].x2, 0);
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| 99 | rc = (eoiIrq[irq] > 0);
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| 100 | if(rc) {
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| 101 | eoiIrq[irq] = 0;
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| 102 | return rc;
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| 103 | }
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| 104 | }
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| 105 | }
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| 106 | return FALSE;
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| 107 | }
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| 108 | //******************************************************************************
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| 109 | //******************************************************************************
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