isa_machdep.c revision 1.3
1 /* $NetBSD: isa_machdep.c,v 1.3 1998/01/12 18:04:19 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1997 Leo Weppelman. All rights reserved. 5 * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved. 6 * Copyright (c) 1994 Charles Hannum. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Charles Hannum. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <sys/types.h> 35 #include <sys/param.h> 36 #include <sys/time.h> 37 #include <sys/systm.h> 38 #include <sys/errno.h> 39 #include <sys/device.h> 40 41 #include <vm/vm.h> 42 #include <vm/vm_kern.h> 43 44 #include <dev/isa/isavar.h> 45 #include <dev/isa/isareg.h> 46 47 #include <machine/bus.h> 48 #include <machine/cpu.h> 49 #include <machine/iomap.h> 50 #include <machine/mfp.h> 51 #include <atari/atari/device.h> 52 53 static int isabusprint __P((void *auxp, const char *)); 54 static int isabusmatch __P((struct device *, struct cfdata *, void *)); 55 static void isabusattach __P((struct device *, struct device *, void *)); 56 57 struct cfattach isabus_ca = { 58 sizeof(struct device), isabusmatch, isabusattach 59 }; 60 61 int 62 isabusmatch(pdp, cfp, auxp) 63 struct device *pdp; 64 struct cfdata *cfp; 65 void *auxp; 66 { 67 if(atari_realconfig == 0) 68 return (0); 69 if (strcmp((char *)auxp, "isabus") || cfp->cf_unit != 0) 70 return(0); 71 return(machineid & ATARI_HADES ? 1 : 0); 72 } 73 74 void 75 isabusattach(pdp, dp, auxp) 76 struct device *pdp, *dp; 77 void *auxp; 78 { 79 struct isabus_attach_args iba; 80 81 iba.iba_busname = "isa"; 82 iba.iba_iot = ISA_IOSTART; 83 iba.iba_memt = ISA_MEMSTART; 84 85 MFP->mf_aer |= (IO_ISA1|IO_ISA2); /* ISA interrupts: LOW->HIGH */ 86 87 printf("\n"); 88 config_found(dp, &iba, isabusprint); 89 } 90 91 int 92 isabusprint(auxp, name) 93 void *auxp; 94 const char *name; 95 { 96 if(name == NULL) 97 return(UNCONF); 98 return(QUIET); 99 } 100 101 void 102 isa_attach_hook(parent, self, iba) 103 struct device *parent, *self; 104 struct isabus_attach_args *iba; 105 { 106 } 107 108 /* 109 * The interrupt stuff is rather ugly. On the Hades, all interrupt lines 110 * for a slot are wired together and connected to either IO3 (slot1) or 111 * IO7 (slot2). Since no info can be obtained about the slot position 112 * at isa_intr_establish() time, the following assumption is made: 113 * - irq <= 6 -> slot 1 114 * - irq > 6 -> slot 2 115 */ 116 static isa_intr_info_t iinfo[2] = { { -1 }, { -1 } }; 117 118 static int iifun __P((int, int)); 119 120 static int 121 iifun(slot, sr) 122 int slot; 123 int sr; 124 { 125 isa_intr_info_t *iinfo_p; 126 int s; 127 128 iinfo_p = &iinfo[slot]; 129 130 /* 131 * Disable the interrupts 132 */ 133 if (slot == 0) 134 MFP->mf_imrb &= ~(IB_ISA1); 135 else MFP->mf_imra &= ~(IA_ISA2); 136 137 138 if ((sr & PSL_IPL) >= iinfo_p->ipl) { 139 /* 140 * We're running at a too high priority now. 141 */ 142 add_sicallback((si_farg)iifun, (void*)slot, 0); 143 } 144 else { 145 s = splx(iinfo_p->ipl); 146 (void) (iinfo_p->ifunc)(iinfo_p->iarg, 0); 147 splx(s); 148 149 /* 150 * Re-enable interrupts after handling 151 */ 152 if (slot == 0) 153 MFP->mf_imrb |= IB_ISA1; 154 else MFP->mf_imra |= IA_ISA2; 155 } 156 return 1; 157 } 158 159 void * 160 isa_intr_establish(ic, irq, type, level, ih_fun, ih_arg) 161 isa_chipset_tag_t ic; 162 int irq, type, level; 163 hw_ifun_t ih_fun; 164 void *ih_arg; 165 { 166 isa_intr_info_t *iinfo_p; 167 struct intrhand *ihand; 168 int slot; 169 170 slot = (irq <= 6) ? 0 : 1; 171 iinfo_p = &iinfo[slot]; 172 173 if (iinfo_p->slot > 0) 174 panic("isa_intr_establish: interrupt was already established\n"); 175 176 ihand = intr_establish((slot == 0) ? 3 : 15, USER_VEC, 0, 177 (hw_ifun_t)iifun, (void *)slot); 178 if (ihand != NULL) { 179 iinfo_p->slot = slot; 180 iinfo_p->ipl = level; 181 iinfo_p->ifunc = ih_fun; 182 iinfo_p->iarg = ih_arg; 183 iinfo_p->ihand = ihand; 184 185 /* 186 * Enable (unmask) the interrupt 187 */ 188 if (slot == 0) { 189 MFP->mf_imrb |= IB_ISA1; 190 MFP->mf_ierb |= IB_ISA1; 191 } 192 else { 193 MFP->mf_imra |= IA_ISA2; 194 MFP->mf_iera |= IA_ISA2; 195 } 196 return(iinfo_p); 197 } 198 return NULL; 199 } 200 201 void 202 isa_intr_disestablish(ic, handler) 203 isa_chipset_tag_t ic; 204 void *handler; 205 { 206 isa_intr_info_t *iinfo_p = (isa_intr_info_t *)handler; 207 208 if (iinfo_p->slot < 0) 209 panic("isa_intr_disestablish: interrupt was not established\n"); 210 211 (void) intr_disestablish(iinfo_p->ihand); 212 iinfo_p->slot = -1; 213 } 214
Indexes created Fri Oct 03 02:09:57 GMT 2025