Commit | Line | Data |
---|---|---|
5667b711 WN |
1 | /*- |
2 | * Copyright (c) 1990 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% | |
9 | * | |
8dfab1b8 | 10 | * @(#)isa.c 1.5 (Berkeley) %G% |
5667b711 WN |
11 | */ |
12 | ||
57bbb53e BJ |
13 | /* |
14 | * code to manage AT bus | |
57bbb53e BJ |
15 | */ |
16 | ||
17 | #include "param.h" | |
18 | #include "systm.h" | |
19 | #include "conf.h" | |
20 | #include "file.h" | |
57bbb53e | 21 | #include "buf.h" |
57bbb53e | 22 | #include "uio.h" |
4686adac BJ |
23 | #include "syslog.h" |
24 | #include "machine/segments.h" | |
5667b711 WN |
25 | #include "i386/isa/isa_device.h" |
26 | #include "i386/isa/icu.h" | |
4686adac BJ |
27 | |
28 | /* | |
29 | * Configure all ISA devices | |
30 | */ | |
31 | isa_configure() { | |
32 | struct isa_device *dvp; | |
33 | struct isa_driver *dp; | |
34 | ||
35 | splhigh(); | |
36 | INTREN(IRQ_SLAVE); | |
37 | for (dvp = isa_devtab_bio; config_isadev(dvp,&biomask); dvp++); | |
38 | for (dvp = isa_devtab_tty; config_isadev(dvp,&ttymask); dvp++); | |
39 | for (dvp = isa_devtab_net; config_isadev(dvp,&netmask); dvp++); | |
40 | for (dvp = isa_devtab_null; config_isadev(dvp,0); dvp++); | |
41 | #include "sl.h" | |
42 | #if NSL > 0 | |
43 | netmask |= ttymask; | |
44 | ttymask |= netmask; | |
45 | #endif | |
46 | /* biomask |= ttymask ; can some tty devices use buffers? */ | |
47 | printf("biomask %x ttymask %x netmask %x\n", biomask, ttymask, netmask); | |
48 | splnone(); | |
49 | } | |
50 | ||
51 | /* | |
52 | * Configure an ISA device. | |
53 | */ | |
54 | config_isadev(isdp, mp) | |
55 | struct isa_device *isdp; | |
56 | int *mp; | |
57 | { | |
58 | struct isa_driver *dp; | |
59 | ||
60 | if (dp = isdp->id_driver) { | |
61 | if (isdp->id_maddr) { | |
5667b711 | 62 | extern int atdevbase; |
4686adac BJ |
63 | |
64 | isdp->id_maddr -= 0xa0000; | |
5667b711 | 65 | isdp->id_maddr += atdevbase; |
4686adac BJ |
66 | } |
67 | isdp->id_alive = (*dp->probe)(isdp); | |
68 | if (isdp->id_alive) { | |
69 | printf("%s%d", dp->name, isdp->id_unit); | |
70 | (*dp->attach)(isdp); | |
71 | printf(" at 0x%x ", isdp->id_iobase); | |
72 | if(isdp->id_irq) { | |
73 | int intrno; | |
74 | ||
75 | intrno = ffs(isdp->id_irq)-1; | |
76 | printf("irq %d ", intrno); | |
77 | INTREN(isdp->id_irq); | |
78 | if(mp)INTRMASK(*mp,isdp->id_irq); | |
79 | setidt(ICU_OFFSET+intrno, isdp->id_intr, | |
80 | SDT_SYS386IGT, SEL_KPL); | |
81 | } | |
82 | if (isdp->id_drq != -1) printf("drq %d ", isdp->id_drq); | |
83 | printf("on isa\n"); | |
84 | } | |
85 | return (1); | |
86 | } else return(0); | |
87 | } | |
88 | ||
8dfab1b8 | 89 | #define IDTVEC(name) __CONCAT(X,name) |
4686adac BJ |
90 | /* default interrupt vector table */ |
91 | extern IDTVEC(intr0), IDTVEC(intr1), IDTVEC(intr2), IDTVEC(intr3), | |
92 | IDTVEC(intr4), IDTVEC(intr5), IDTVEC(intr6), IDTVEC(intr7), | |
93 | IDTVEC(intr8), IDTVEC(intr9), IDTVEC(intr10), IDTVEC(intr11), | |
94 | IDTVEC(intr12), IDTVEC(intr13), IDTVEC(intr14), IDTVEC(intr15); | |
95 | ||
96 | /* | |
97 | * Fill in default interrupt table (in case of spuruious interrupt | |
98 | * during configuration of kernel, setup interrupt control unit | |
99 | */ | |
100 | isa_defaultirq() { | |
101 | ||
102 | /* first icu */ | |
103 | setidt(32, &IDTVEC(intr0), SDT_SYS386IGT, SEL_KPL); | |
104 | setidt(33, &IDTVEC(intr1), SDT_SYS386IGT, SEL_KPL); | |
105 | setidt(34, &IDTVEC(intr2), SDT_SYS386IGT, SEL_KPL); | |
106 | setidt(35, &IDTVEC(intr3), SDT_SYS386IGT, SEL_KPL); | |
107 | setidt(36, &IDTVEC(intr4), SDT_SYS386IGT, SEL_KPL); | |
108 | setidt(37, &IDTVEC(intr5), SDT_SYS386IGT, SEL_KPL); | |
109 | setidt(38, &IDTVEC(intr6), SDT_SYS386IGT, SEL_KPL); | |
110 | setidt(39, &IDTVEC(intr7), SDT_SYS386IGT, SEL_KPL); | |
111 | ||
112 | /* second icu */ | |
113 | setidt(40, &IDTVEC(intr8), SDT_SYS386IGT, SEL_KPL); | |
114 | setidt(41, &IDTVEC(intr9), SDT_SYS386IGT, SEL_KPL); | |
115 | setidt(42, &IDTVEC(intr10), SDT_SYS386IGT, SEL_KPL); | |
116 | setidt(43, &IDTVEC(intr11), SDT_SYS386IGT, SEL_KPL); | |
117 | setidt(44, &IDTVEC(intr12), SDT_SYS386IGT, SEL_KPL); | |
118 | setidt(45, &IDTVEC(intr13), SDT_SYS386IGT, SEL_KPL); | |
119 | setidt(46, &IDTVEC(intr14), SDT_SYS386IGT, SEL_KPL); | |
120 | setidt(47, &IDTVEC(intr15), SDT_SYS386IGT, SEL_KPL); | |
121 | ||
122 | /* initialize 8259's */ | |
123 | outb(0xf1,0); | |
124 | outb(0x20,0x11); | |
125 | outb(0x21,32); | |
126 | outb(0x21,4); | |
127 | outb(0x21,1); | |
128 | outb(0x21,0xff); | |
129 | ||
130 | outb(0xa0,0x11); | |
131 | outb(0xa1,40); | |
132 | outb(0xa1,2); | |
133 | outb(0xa1,1); | |
134 | outb(0xa1,0xff); | |
135 | } | |
57bbb53e BJ |
136 | |
137 | /* stuff needed for virtual to physical calculations */ | |
138 | extern char Sysbase; | |
139 | static unsigned long sbase = (unsigned long) &Sysbase; | |
140 | ||
141 | struct buf *dma_bounce[8]; | |
142 | #define MAXDMASZ 512 | |
143 | ||
144 | /* XXX temporary */ | |
145 | kernel_space(x) | |
146 | unsigned long x; | |
147 | { | |
148 | if ((x >= sbase) & (x < sbase + 0x800000)) return 1; | |
149 | else return 0; | |
150 | } | |
151 | ||
152 | ||
153 | /****************************************************************************/ | |
154 | /* at_dma */ | |
155 | /* set up DMA read/write operation and virtual address addr for nbytes */ | |
156 | /****************************************************************************/ | |
157 | at_dma(read,addr,nbytes, chan) | |
158 | int read; | |
159 | unsigned long addr; | |
160 | int nbytes; | |
161 | { | |
162 | unsigned long phys; | |
163 | int s,raw; | |
164 | caddr_t bounce; | |
165 | ||
166 | if (kernel_space(addr)) raw = 0; | |
167 | else raw = 1; | |
168 | ||
169 | if(raw) { | |
170 | if (dma_bounce[chan] == 0) | |
171 | dma_bounce[chan] = geteblk(MAXDMASZ); | |
172 | bounce = dma_bounce[chan]->b_un.b_addr; | |
173 | } | |
174 | ||
175 | /* copy bounce buffer on write */ | |
176 | if (raw && !read) bcopy(addr,bounce,nbytes); | |
177 | ||
178 | /* Set read/write bytes */ | |
179 | if (read) { | |
180 | outb(0xC,0x46); outb(0xB,0x46); | |
181 | } else { | |
182 | outb(0xC,0x4A); outb(0xB,0x4A); | |
183 | } | |
184 | /* Send start address */ | |
185 | if (raw) phys = (unsigned long) bounce; | |
186 | else phys = addr; | |
187 | /* translate to physical */ | |
8dfab1b8 | 188 | phys = pmap_extract(pmap_kernel(), (vm_offset_t)phys); |
57bbb53e BJ |
189 | outb(0x4,phys & 0xFF); |
190 | outb(0x4,(phys>>8) & 0xFF); | |
191 | outb(0x81,(phys>>16) & 0xFF); | |
192 | /* Send count */ | |
193 | nbytes--; | |
194 | outb(0x5,nbytes & 0xFF); | |
195 | outb(0x5,(nbytes>>8) & 0xFF); | |
196 | /* set channel 2 */ | |
197 | outb(0x0A,chan); | |
198 | } | |
4686adac BJ |
199 | |
200 | /* | |
201 | * Handle a NMI, possibly a machine check. | |
202 | * return true to panic system, false to ignore. | |
203 | */ | |
204 | isa_nmi(cd) { | |
205 | ||
206 | log(LOG_CRIT, "\nNMI port 61 %x, port 70 %x\n", inb(0x61), inb(0x70)); | |
207 | return(0); | |
208 | } | |
209 | ||
210 | /* | |
211 | * Caught a stray interrupt, notify | |
212 | */ | |
213 | isa_strayintr(d) { | |
214 | ||
215 | /* for some reason, we get bursts of intr #7, even if not enabled! */ | |
216 | log(LOG_ERR,"ISA strayintr %d", ffs(d)-1); | |
217 | } |