1 /* 2 * code to manage AT bus 3 * @(#)isa.c 1.3 (Berkeley) 01/08/91 4 */ 5 6 #include "param.h" 7 #include "systm.h" 8 #include "conf.h" 9 #include "file.h" 10 #include "dir.h" 11 #include "user.h" 12 #include "buf.h" 13 #include "vm.h" 14 #include "uio.h" 15 #include "syslog.h" 16 #include "machine/segments.h" 17 #include "machine/pte.h" 18 #include "machine/isa/isa_device.h" 19 #include "machine/isa/icu.h" 20 21 /* 22 * Configure all ISA devices 23 */ 24 isa_configure() { 25 struct isa_device *dvp; 26 struct isa_driver *dp; 27 28 splhigh(); 29 INTREN(IRQ_SLAVE); 30 for (dvp = isa_devtab_bio; config_isadev(dvp,&biomask); dvp++); 31 for (dvp = isa_devtab_tty; config_isadev(dvp,&ttymask); dvp++); 32 for (dvp = isa_devtab_net; config_isadev(dvp,&netmask); dvp++); 33 for (dvp = isa_devtab_null; config_isadev(dvp,0); dvp++); 34 #include "sl.h" 35 #if NSL > 0 36 netmask |= ttymask; 37 ttymask |= netmask; 38 #endif 39 /* biomask |= ttymask ; can some tty devices use buffers? */ 40 printf("biomask %x ttymask %x netmask %x\n", biomask, ttymask, netmask); 41 splnone(); 42 } 43 44 /* 45 * Configure an ISA device. 46 */ 47 config_isadev(isdp, mp) 48 struct isa_device *isdp; 49 int *mp; 50 { 51 struct isa_driver *dp; 52 53 if (dp = isdp->id_driver) { 54 if (isdp->id_maddr) { 55 extern int atdevbase[]; 56 57 isdp->id_maddr -= 0xa0000; 58 isdp->id_maddr += (int)&atdevbase; 59 } 60 isdp->id_alive = (*dp->probe)(isdp); 61 if (isdp->id_alive) { 62 printf("%s%d", dp->name, isdp->id_unit); 63 (*dp->attach)(isdp); 64 printf(" at 0x%x ", isdp->id_iobase); 65 if(isdp->id_irq) { 66 int intrno; 67 68 intrno = ffs(isdp->id_irq)-1; 69 printf("irq %d ", intrno); 70 INTREN(isdp->id_irq); 71 if(mp)INTRMASK(*mp,isdp->id_irq); 72 setidt(ICU_OFFSET+intrno, isdp->id_intr, 73 SDT_SYS386IGT, SEL_KPL); 74 } 75 if (isdp->id_drq != -1) printf("drq %d ", isdp->id_drq); 76 printf("on isa\n"); 77 } 78 return (1); 79 } else return(0); 80 } 81 82 #define IDTVEC(name) X/**/name 83 /* default interrupt vector table */ 84 extern IDTVEC(intr0), IDTVEC(intr1), IDTVEC(intr2), IDTVEC(intr3), 85 IDTVEC(intr4), IDTVEC(intr5), IDTVEC(intr6), IDTVEC(intr7), 86 IDTVEC(intr8), IDTVEC(intr9), IDTVEC(intr10), IDTVEC(intr11), 87 IDTVEC(intr12), IDTVEC(intr13), IDTVEC(intr14), IDTVEC(intr15); 88 89 /* 90 * Fill in default interrupt table (in case of spuruious interrupt 91 * during configuration of kernel, setup interrupt control unit 92 */ 93 isa_defaultirq() { 94 95 /* first icu */ 96 setidt(32, &IDTVEC(intr0), SDT_SYS386IGT, SEL_KPL); 97 setidt(33, &IDTVEC(intr1), SDT_SYS386IGT, SEL_KPL); 98 setidt(34, &IDTVEC(intr2), SDT_SYS386IGT, SEL_KPL); 99 setidt(35, &IDTVEC(intr3), SDT_SYS386IGT, SEL_KPL); 100 setidt(36, &IDTVEC(intr4), SDT_SYS386IGT, SEL_KPL); 101 setidt(37, &IDTVEC(intr5), SDT_SYS386IGT, SEL_KPL); 102 setidt(38, &IDTVEC(intr6), SDT_SYS386IGT, SEL_KPL); 103 setidt(39, &IDTVEC(intr7), SDT_SYS386IGT, SEL_KPL); 104 105 /* second icu */ 106 setidt(40, &IDTVEC(intr8), SDT_SYS386IGT, SEL_KPL); 107 setidt(41, &IDTVEC(intr9), SDT_SYS386IGT, SEL_KPL); 108 setidt(42, &IDTVEC(intr10), SDT_SYS386IGT, SEL_KPL); 109 setidt(43, &IDTVEC(intr11), SDT_SYS386IGT, SEL_KPL); 110 setidt(44, &IDTVEC(intr12), SDT_SYS386IGT, SEL_KPL); 111 setidt(45, &IDTVEC(intr13), SDT_SYS386IGT, SEL_KPL); 112 setidt(46, &IDTVEC(intr14), SDT_SYS386IGT, SEL_KPL); 113 setidt(47, &IDTVEC(intr15), SDT_SYS386IGT, SEL_KPL); 114 115 /* initialize 8259's */ 116 outb(0xf1,0); 117 outb(0x20,0x11); 118 outb(0x21,32); 119 outb(0x21,4); 120 outb(0x21,1); 121 outb(0x21,0xff); 122 123 outb(0xa0,0x11); 124 outb(0xa1,40); 125 outb(0xa1,2); 126 outb(0xa1,1); 127 outb(0xa1,0xff); 128 } 129 130 /* stuff needed for virtual to physical calculations */ 131 extern char Sysbase; 132 static unsigned long sbase = (unsigned long) &Sysbase; 133 134 struct buf *dma_bounce[8]; 135 #define MAXDMASZ 512 136 137 /* XXX temporary */ 138 kernel_space(x) 139 unsigned long x; 140 { 141 if ((x >= sbase) & (x < sbase + 0x800000)) return 1; 142 else return 0; 143 } 144 145 146 /****************************************************************************/ 147 /* at_dma */ 148 /* set up DMA read/write operation and virtual address addr for nbytes */ 149 /****************************************************************************/ 150 at_dma(read,addr,nbytes, chan) 151 int read; 152 unsigned long addr; 153 int nbytes; 154 { 155 unsigned long phys; 156 int s,raw; 157 caddr_t bounce; 158 159 if (kernel_space(addr)) raw = 0; 160 else raw = 1; 161 162 if(raw) { 163 if (dma_bounce[chan] == 0) 164 dma_bounce[chan] = geteblk(MAXDMASZ); 165 bounce = dma_bounce[chan]->b_un.b_addr; 166 } 167 168 /* copy bounce buffer on write */ 169 if (raw && !read) bcopy(addr,bounce,nbytes); 170 171 /* Set read/write bytes */ 172 if (read) { 173 outb(0xC,0x46); outb(0xB,0x46); 174 } else { 175 outb(0xC,0x4A); outb(0xB,0x4A); 176 } 177 /* Send start address */ 178 if (raw) phys = (unsigned long) bounce; 179 else phys = addr; 180 /* translate to physical */ 181 phys = phys - sbase; 182 outb(0x4,phys & 0xFF); 183 outb(0x4,(phys>>8) & 0xFF); 184 outb(0x81,(phys>>16) & 0xFF); 185 /* Send count */ 186 nbytes--; 187 outb(0x5,nbytes & 0xFF); 188 outb(0x5,(nbytes>>8) & 0xFF); 189 /* set channel 2 */ 190 outb(0x0A,chan); 191 } 192 193 /* 194 * Handle a NMI, possibly a machine check. 195 * return true to panic system, false to ignore. 196 */ 197 isa_nmi(cd) { 198 199 log(LOG_CRIT, "\nNMI port 61 %x, port 70 %x\n", inb(0x61), inb(0x70)); 200 return(0); 201 } 202 203 /* 204 * Caught a stray interrupt, notify 205 */ 206 isa_strayintr(d) { 207 208 /* for some reason, we get bursts of intr #7, even if not enabled! */ 209 log(LOG_ERR,"ISA strayintr %d", ffs(d)-1); 210 } 211