1 /*- 2 * Copyright (c) 1991 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * %sccs.include.redist.c% 9 * 10 * @(#)isa.c 7.3 (Berkeley) 05/11/92 11 */ 12 13 /* 14 * code to manage AT bus 15 */ 16 17 #include "param.h" 18 #include "systm.h" 19 #include "conf.h" 20 #include "file.h" 21 #include "buf.h" 22 #include "uio.h" 23 #include "syslog.h" 24 #include "machine/segments.h" 25 #include "i386/isa/isa_device.h" 26 #include "i386/isa/icu.h" 27 #include "vm/vm.h" 28 29 /* 30 * Configure all ISA devices 31 */ 32 isa_configure() { 33 struct isa_device *dvp; 34 struct isa_driver *dp; 35 36 splhigh(); 37 INTREN(IRQ_SLAVE); 38 for (dvp = isa_devtab_bio; config_isadev(dvp,&biomask); dvp++); 39 for (dvp = isa_devtab_tty; config_isadev(dvp,&ttymask); dvp++); 40 for (dvp = isa_devtab_net; config_isadev(dvp,&netmask); dvp++); 41 for (dvp = isa_devtab_null; config_isadev(dvp,0); dvp++); 42 #include "sl.h" 43 #if NSL > 0 44 netmask |= ttymask; 45 ttymask |= netmask; 46 #endif 47 /* biomask |= ttymask ; can some tty devices use buffers? */ 48 printf("biomask %x ttymask %x netmask %x\n", biomask, ttymask, netmask); 49 splnone(); 50 } 51 52 /* 53 * Configure an ISA device. 54 */ 55 config_isadev(isdp, mp) 56 struct isa_device *isdp; 57 int *mp; 58 { 59 struct isa_driver *dp; 60 61 if (dp = isdp->id_driver) { 62 if (isdp->id_maddr) { 63 extern int atdevbase; 64 65 isdp->id_maddr -= 0xa0000; 66 isdp->id_maddr += atdevbase; 67 } 68 isdp->id_alive = (*dp->probe)(isdp); 69 if (isdp->id_alive) { 70 printf("%s%d", dp->name, isdp->id_unit); 71 (*dp->attach)(isdp); 72 printf(" at 0x%x ", isdp->id_iobase); 73 if(isdp->id_irq) { 74 int intrno; 75 76 intrno = ffs(isdp->id_irq)-1; 77 printf("irq %d ", intrno); 78 INTREN(isdp->id_irq); 79 if(mp)INTRMASK(*mp,isdp->id_irq); 80 setidt(ICU_OFFSET+intrno, isdp->id_intr, 81 SDT_SYS386IGT, SEL_KPL); 82 } 83 if (isdp->id_drq != -1) printf("drq %d ", isdp->id_drq); 84 printf("on isa\n"); 85 } 86 return (1); 87 } else return(0); 88 } 89 90 #define IDTVEC(name) __CONCAT(X,name) 91 /* default interrupt vector table */ 92 extern IDTVEC(intr0), IDTVEC(intr1), IDTVEC(intr2), IDTVEC(intr3), 93 IDTVEC(intr4), IDTVEC(intr5), IDTVEC(intr6), IDTVEC(intr7), 94 IDTVEC(intr8), IDTVEC(intr9), IDTVEC(intr10), IDTVEC(intr11), 95 IDTVEC(intr12), IDTVEC(intr13), IDTVEC(intr14), IDTVEC(intr15); 96 97 /* 98 * Fill in default interrupt table (in case of spuruious interrupt 99 * during configuration of kernel, setup interrupt control unit 100 */ 101 isa_defaultirq() { 102 103 /* first icu */ 104 setidt(32, &IDTVEC(intr0), SDT_SYS386IGT, SEL_KPL); 105 setidt(33, &IDTVEC(intr1), SDT_SYS386IGT, SEL_KPL); 106 setidt(34, &IDTVEC(intr2), SDT_SYS386IGT, SEL_KPL); 107 setidt(35, &IDTVEC(intr3), SDT_SYS386IGT, SEL_KPL); 108 setidt(36, &IDTVEC(intr4), SDT_SYS386IGT, SEL_KPL); 109 setidt(37, &IDTVEC(intr5), SDT_SYS386IGT, SEL_KPL); 110 setidt(38, &IDTVEC(intr6), SDT_SYS386IGT, SEL_KPL); 111 setidt(39, &IDTVEC(intr7), SDT_SYS386IGT, SEL_KPL); 112 113 /* second icu */ 114 setidt(40, &IDTVEC(intr8), SDT_SYS386IGT, SEL_KPL); 115 setidt(41, &IDTVEC(intr9), SDT_SYS386IGT, SEL_KPL); 116 setidt(42, &IDTVEC(intr10), SDT_SYS386IGT, SEL_KPL); 117 setidt(43, &IDTVEC(intr11), SDT_SYS386IGT, SEL_KPL); 118 setidt(44, &IDTVEC(intr12), SDT_SYS386IGT, SEL_KPL); 119 setidt(45, &IDTVEC(intr13), SDT_SYS386IGT, SEL_KPL); 120 setidt(46, &IDTVEC(intr14), SDT_SYS386IGT, SEL_KPL); 121 setidt(47, &IDTVEC(intr15), SDT_SYS386IGT, SEL_KPL); 122 123 /* initialize 8259's */ 124 outb(0xf1,0); 125 outb(0x20,0x11); 126 outb(0x21,32); 127 outb(0x21,4); 128 outb(0x21,1); 129 outb(0x21,0xff); 130 131 outb(0xa0,0x11); 132 outb(0xa1,40); 133 outb(0xa1,2); 134 outb(0xa1,1); 135 outb(0xa1,0xff); 136 } 137 138 /* stuff needed for virtual to physical calculations */ 139 140 struct buf *dma_bounce[8]; 141 #define MAXDMASZ 512 142 143 /* XXX temporary crud */ 144 kernel_space(x) 145 unsigned long x; 146 { 147 if (x >= KERNBASE) return 1; 148 else return 0; 149 } 150 151 152 /****************************************************************************/ 153 /* at_dma */ 154 /* set up DMA read/write operation and virtual address addr for nbytes */ 155 /****************************************************************************/ 156 at_dma(read,addr,nbytes, chan) 157 int read; 158 unsigned long addr; 159 int nbytes; 160 { 161 unsigned long phys; 162 int s,raw; 163 caddr_t bounce; 164 165 if (kernel_space(addr)) raw = 0; 166 else raw = 1; 167 168 if(raw) { 169 if (dma_bounce[chan] == 0) 170 dma_bounce[chan] = geteblk(MAXDMASZ); 171 bounce = dma_bounce[chan]->b_un.b_addr; 172 } 173 174 /* copy bounce buffer on write */ 175 if (raw && !read) bcopy(addr,bounce,nbytes); 176 177 /* Set read/write bytes */ 178 if (read) { 179 outb(0xC,0x46); outb(0xB,0x46); 180 } else { 181 outb(0xC,0x4A); outb(0xB,0x4A); 182 } 183 /* Send start address */ 184 if (raw) phys = (unsigned long) bounce; 185 else phys = addr; 186 /* translate to physical */ 187 phys = pmap_extract(kernel_pmap, (vm_offset_t)phys); 188 outb(0x4,phys & 0xFF); 189 outb(0x4,(phys>>8) & 0xFF); 190 outb(0x81,(phys>>16) & 0xFF); 191 /* Send count */ 192 nbytes--; 193 outb(0x5,nbytes & 0xFF); 194 outb(0x5,(nbytes>>8) & 0xFF); 195 /* set channel 2 */ 196 outb(0x0A,chan); 197 } 198 199 /* 200 * Handle a NMI, possibly a machine check. 201 * return true to panic system, false to ignore. 202 */ 203 isa_nmi(cd) { 204 205 log(LOG_CRIT, "\nNMI port 61 %x, port 70 %x\n", inb(0x61), inb(0x70)); 206 return(0); 207 } 208 209 /* 210 * Caught a stray interrupt, notify 211 */ 212 isa_strayintr(d) { 213 214 /* for some reason, we get bursts of intr #7, even if not enabled! */ 215 log(LOG_ERR,"ISA strayintr %d", ffs(d)-1); 216 } 217