isa_machdep.c revision 1.4
1 /* $NetBSD: isa_machdep.c,v 1.4 1998/03/10 11:43:10 leo 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 iba.iba_dmat = BUS_ISA_DMA_TAG; 85 86 MFP->mf_aer |= (IO_ISA1|IO_ISA2); /* ISA interrupts: LOW->HIGH */ 87 88 printf("\n"); 89 config_found(dp, &iba, isabusprint); 90 } 91 92 int 93 isabusprint(auxp, name) 94 void *auxp; 95 const char *name; 96 { 97 if(name == NULL) 98 return(UNCONF); 99 return(QUIET); 100 } 101 102 void 103 isa_attach_hook(parent, self, iba) 104 struct device *parent, *self; 105 struct isabus_attach_args *iba; 106 { 107 } 108 109 /* 110 * The interrupt stuff is rather ugly. On the Hades, all interrupt lines 111 * for a slot are wired together and connected to either IO3 (slot1) or 112 * IO7 (slot2). Since no info can be obtained about the slot position 113 * at isa_intr_establish() time, the following assumption is made: 114 * - irq <= 6 -> slot 1 115 * - irq > 6 -> slot 2 116 */ 117 static isa_intr_info_t iinfo[2] = { { -1 }, { -1 } }; 118 119 static int iifun __P((int, int)); 120 121 static int 122 iifun(slot, sr) 123 int slot; 124 int sr; 125 { 126 isa_intr_info_t *iinfo_p; 127 int s; 128 129 iinfo_p = &iinfo[slot]; 130 131 /* 132 * Disable the interrupts 133 */ 134 if (slot == 0) 135 MFP->mf_imrb &= ~(IB_ISA1); 136 else MFP->mf_imra &= ~(IA_ISA2); 137 138 139 if ((sr & PSL_IPL) >= iinfo_p->ipl) { 140 /* 141 * We're running at a too high priority now. 142 */ 143 add_sicallback((si_farg)iifun, (void*)slot, 0); 144 } 145 else { 146 s = splx(iinfo_p->ipl); 147 (void) (iinfo_p->ifunc)(iinfo_p->iarg, 0); 148 splx(s); 149 150 /* 151 * Re-enable interrupts after handling 152 */ 153 if (slot == 0) 154 MFP->mf_imrb |= IB_ISA1; 155 else MFP->mf_imra |= IA_ISA2; 156 } 157 return 1; 158 } 159 160 void * 161 isa_intr_establish(ic, irq, type, level, ih_fun, ih_arg) 162 isa_chipset_tag_t ic; 163 int irq, type, level; 164 hw_ifun_t ih_fun; 165 void *ih_arg; 166 { 167 isa_intr_info_t *iinfo_p; 168 struct intrhand *ihand; 169 int slot; 170 171 slot = (irq <= 6) ? 0 : 1; 172 iinfo_p = &iinfo[slot]; 173 174 if (iinfo_p->slot > 0) 175 panic("isa_intr_establish: interrupt was already established\n"); 176 177 ihand = intr_establish((slot == 0) ? 3 : 15, USER_VEC, 0, 178 (hw_ifun_t)iifun, (void *)slot); 179 if (ihand != NULL) { 180 iinfo_p->slot = slot; 181 iinfo_p->ipl = level; 182 iinfo_p->ifunc = ih_fun; 183 iinfo_p->iarg = ih_arg; 184 iinfo_p->ihand = ihand; 185 186 /* 187 * Enable (unmask) the interrupt 188 */ 189 if (slot == 0) { 190 MFP->mf_imrb |= IB_ISA1; 191 MFP->mf_ierb |= IB_ISA1; 192 } 193 else { 194 MFP->mf_imra |= IA_ISA2; 195 MFP->mf_iera |= IA_ISA2; 196 } 197 return(iinfo_p); 198 } 199 return NULL; 200 } 201 202 void 203 isa_intr_disestablish(ic, handler) 204 isa_chipset_tag_t ic; 205 void *handler; 206 { 207 isa_intr_info_t *iinfo_p = (isa_intr_info_t *)handler; 208 209 if (iinfo_p->slot < 0) 210 panic("isa_intr_disestablish: interrupt was not established\n"); 211 212 (void) intr_disestablish(iinfo_p->ihand); 213 iinfo_p->slot = -1; 214 } 215
Indexes created Fri Oct 03 02:09:57 GMT 2025