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af359dea C |
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 | * 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 the University of | |
19 | * California, Berkeley and its contributors. | |
20 | * 4. Neither the name of the University nor the names of its contributors | |
21 | * may be used to endorse or promote products derived from this software | |
22 | * without specific prior written permission. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
34 | * SUCH DAMAGE. | |
35 | * | |
36 | * @(#)isa.c 7.2 (Berkeley) 5/13/91 | |
37 | */ | |
38 | ||
57bbb53e BJ |
39 | /* |
40 | * code to manage AT bus | |
57bbb53e BJ |
41 | */ |
42 | ||
43 | #include "param.h" | |
44 | #include "systm.h" | |
45 | #include "conf.h" | |
46 | #include "file.h" | |
57bbb53e | 47 | #include "buf.h" |
57bbb53e | 48 | #include "uio.h" |
4686adac BJ |
49 | #include "syslog.h" |
50 | #include "machine/segments.h" | |
af359dea C |
51 | #include "i386/isa/isa_device.h" |
52 | #include "i386/isa/icu.h" | |
4686adac BJ |
53 | |
54 | /* | |
55 | * Configure all ISA devices | |
56 | */ | |
57 | isa_configure() { | |
58 | struct isa_device *dvp; | |
59 | struct isa_driver *dp; | |
60 | ||
61 | splhigh(); | |
62 | INTREN(IRQ_SLAVE); | |
63 | for (dvp = isa_devtab_bio; config_isadev(dvp,&biomask); dvp++); | |
64 | for (dvp = isa_devtab_tty; config_isadev(dvp,&ttymask); dvp++); | |
65 | for (dvp = isa_devtab_net; config_isadev(dvp,&netmask); dvp++); | |
66 | for (dvp = isa_devtab_null; config_isadev(dvp,0); dvp++); | |
67 | #include "sl.h" | |
68 | #if NSL > 0 | |
69 | netmask |= ttymask; | |
70 | ttymask |= netmask; | |
71 | #endif | |
72 | /* biomask |= ttymask ; can some tty devices use buffers? */ | |
73 | printf("biomask %x ttymask %x netmask %x\n", biomask, ttymask, netmask); | |
74 | splnone(); | |
75 | } | |
76 | ||
77 | /* | |
78 | * Configure an ISA device. | |
79 | */ | |
80 | config_isadev(isdp, mp) | |
81 | struct isa_device *isdp; | |
82 | int *mp; | |
83 | { | |
84 | struct isa_driver *dp; | |
85 | ||
86 | if (dp = isdp->id_driver) { | |
87 | if (isdp->id_maddr) { | |
af359dea | 88 | extern int atdevbase; |
4686adac BJ |
89 | |
90 | isdp->id_maddr -= 0xa0000; | |
af359dea | 91 | isdp->id_maddr += atdevbase; |
4686adac BJ |
92 | } |
93 | isdp->id_alive = (*dp->probe)(isdp); | |
94 | if (isdp->id_alive) { | |
95 | printf("%s%d", dp->name, isdp->id_unit); | |
96 | (*dp->attach)(isdp); | |
97 | printf(" at 0x%x ", isdp->id_iobase); | |
98 | if(isdp->id_irq) { | |
99 | int intrno; | |
100 | ||
101 | intrno = ffs(isdp->id_irq)-1; | |
102 | printf("irq %d ", intrno); | |
103 | INTREN(isdp->id_irq); | |
104 | if(mp)INTRMASK(*mp,isdp->id_irq); | |
105 | setidt(ICU_OFFSET+intrno, isdp->id_intr, | |
106 | SDT_SYS386IGT, SEL_KPL); | |
107 | } | |
108 | if (isdp->id_drq != -1) printf("drq %d ", isdp->id_drq); | |
109 | printf("on isa\n"); | |
110 | } | |
111 | return (1); | |
112 | } else return(0); | |
113 | } | |
114 | ||
af359dea | 115 | #define IDTVEC(name) __CONCAT(X,name) |
4686adac BJ |
116 | /* default interrupt vector table */ |
117 | extern IDTVEC(intr0), IDTVEC(intr1), IDTVEC(intr2), IDTVEC(intr3), | |
118 | IDTVEC(intr4), IDTVEC(intr5), IDTVEC(intr6), IDTVEC(intr7), | |
119 | IDTVEC(intr8), IDTVEC(intr9), IDTVEC(intr10), IDTVEC(intr11), | |
120 | IDTVEC(intr12), IDTVEC(intr13), IDTVEC(intr14), IDTVEC(intr15); | |
121 | ||
122 | /* | |
123 | * Fill in default interrupt table (in case of spuruious interrupt | |
124 | * during configuration of kernel, setup interrupt control unit | |
125 | */ | |
126 | isa_defaultirq() { | |
127 | ||
128 | /* first icu */ | |
129 | setidt(32, &IDTVEC(intr0), SDT_SYS386IGT, SEL_KPL); | |
130 | setidt(33, &IDTVEC(intr1), SDT_SYS386IGT, SEL_KPL); | |
131 | setidt(34, &IDTVEC(intr2), SDT_SYS386IGT, SEL_KPL); | |
132 | setidt(35, &IDTVEC(intr3), SDT_SYS386IGT, SEL_KPL); | |
133 | setidt(36, &IDTVEC(intr4), SDT_SYS386IGT, SEL_KPL); | |
134 | setidt(37, &IDTVEC(intr5), SDT_SYS386IGT, SEL_KPL); | |
135 | setidt(38, &IDTVEC(intr6), SDT_SYS386IGT, SEL_KPL); | |
136 | setidt(39, &IDTVEC(intr7), SDT_SYS386IGT, SEL_KPL); | |
137 | ||
138 | /* second icu */ | |
139 | setidt(40, &IDTVEC(intr8), SDT_SYS386IGT, SEL_KPL); | |
140 | setidt(41, &IDTVEC(intr9), SDT_SYS386IGT, SEL_KPL); | |
141 | setidt(42, &IDTVEC(intr10), SDT_SYS386IGT, SEL_KPL); | |
142 | setidt(43, &IDTVEC(intr11), SDT_SYS386IGT, SEL_KPL); | |
143 | setidt(44, &IDTVEC(intr12), SDT_SYS386IGT, SEL_KPL); | |
144 | setidt(45, &IDTVEC(intr13), SDT_SYS386IGT, SEL_KPL); | |
145 | setidt(46, &IDTVEC(intr14), SDT_SYS386IGT, SEL_KPL); | |
146 | setidt(47, &IDTVEC(intr15), SDT_SYS386IGT, SEL_KPL); | |
147 | ||
148 | /* initialize 8259's */ | |
149 | outb(0xf1,0); | |
150 | outb(0x20,0x11); | |
151 | outb(0x21,32); | |
152 | outb(0x21,4); | |
153 | outb(0x21,1); | |
154 | outb(0x21,0xff); | |
155 | ||
156 | outb(0xa0,0x11); | |
157 | outb(0xa1,40); | |
158 | outb(0xa1,2); | |
159 | outb(0xa1,1); | |
160 | outb(0xa1,0xff); | |
161 | } | |
57bbb53e BJ |
162 | |
163 | /* stuff needed for virtual to physical calculations */ | |
57bbb53e BJ |
164 | |
165 | struct buf *dma_bounce[8]; | |
166 | #define MAXDMASZ 512 | |
167 | ||
af359dea | 168 | /* XXX temporary crud */ |
57bbb53e BJ |
169 | kernel_space(x) |
170 | unsigned long x; | |
171 | { | |
af359dea | 172 | if (x >= KERNBASE) return 1; |
57bbb53e BJ |
173 | else return 0; |
174 | } | |
175 | ||
176 | ||
177 | /****************************************************************************/ | |
178 | /* at_dma */ | |
179 | /* set up DMA read/write operation and virtual address addr for nbytes */ | |
180 | /****************************************************************************/ | |
181 | at_dma(read,addr,nbytes, chan) | |
182 | int read; | |
183 | unsigned long addr; | |
184 | int nbytes; | |
185 | { | |
186 | unsigned long phys; | |
187 | int s,raw; | |
188 | caddr_t bounce; | |
189 | ||
190 | if (kernel_space(addr)) raw = 0; | |
191 | else raw = 1; | |
192 | ||
193 | if(raw) { | |
194 | if (dma_bounce[chan] == 0) | |
195 | dma_bounce[chan] = geteblk(MAXDMASZ); | |
196 | bounce = dma_bounce[chan]->b_un.b_addr; | |
197 | } | |
198 | ||
199 | /* copy bounce buffer on write */ | |
200 | if (raw && !read) bcopy(addr,bounce,nbytes); | |
201 | ||
202 | /* Set read/write bytes */ | |
203 | if (read) { | |
204 | outb(0xC,0x46); outb(0xB,0x46); | |
205 | } else { | |
206 | outb(0xC,0x4A); outb(0xB,0x4A); | |
207 | } | |
208 | /* Send start address */ | |
209 | if (raw) phys = (unsigned long) bounce; | |
210 | else phys = addr; | |
211 | /* translate to physical */ | |
af359dea | 212 | phys = pmap_extract(pmap_kernel(), (vm_offset_t)phys); |
57bbb53e BJ |
213 | outb(0x4,phys & 0xFF); |
214 | outb(0x4,(phys>>8) & 0xFF); | |
215 | outb(0x81,(phys>>16) & 0xFF); | |
216 | /* Send count */ | |
217 | nbytes--; | |
218 | outb(0x5,nbytes & 0xFF); | |
219 | outb(0x5,(nbytes>>8) & 0xFF); | |
220 | /* set channel 2 */ | |
221 | outb(0x0A,chan); | |
222 | } | |
4686adac BJ |
223 | |
224 | /* | |
225 | * Handle a NMI, possibly a machine check. | |
226 | * return true to panic system, false to ignore. | |
227 | */ | |
228 | isa_nmi(cd) { | |
229 | ||
230 | log(LOG_CRIT, "\nNMI port 61 %x, port 70 %x\n", inb(0x61), inb(0x70)); | |
231 | return(0); | |
232 | } | |
233 | ||
234 | /* | |
235 | * Caught a stray interrupt, notify | |
236 | */ | |
237 | isa_strayintr(d) { | |
238 | ||
239 | /* for some reason, we get bursts of intr #7, even if not enabled! */ | |
240 | log(LOG_ERR,"ISA strayintr %d", ffs(d)-1); | |
241 | } |