1 /*
2 * System-specific setup, especially interrupts.
3 *
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License. See the file "COPYING" in the main directory of this archive
6 * for more details.
7 *
8 * Copyright (C) 1998 Harald Koerfgen
9 * Copyright (C) 2000, 2001, 2002, 2003, 2005, 2020 Maciej W. Rozycki
10 */
11 #include <linux/console.h>
12 #include <linux/export.h>
13 #include <linux/init.h>
14 #include <linux/interrupt.h>
15 #include <linux/ioport.h>
16 #include <linux/irq.h>
17 #include <linux/irqnr.h>
18 #include <linux/memblock.h>
19 #include <linux/param.h>
20 #include <linux/percpu-defs.h>
21 #include <linux/sched.h>
22 #include <linux/spinlock.h>
23 #include <linux/types.h>
24 #include <linux/pm.h>
25
26 #include <asm/addrspace.h>
27 #include <asm/bootinfo.h>
28 #include <asm/cpu.h>
29 #include <asm/cpu-features.h>
30 #include <asm/cpu-type.h>
31 #include <asm/irq.h>
32 #include <asm/irq_cpu.h>
33 #include <asm/mipsregs.h>
34 #include <asm/page.h>
35 #include <asm/reboot.h>
36 #include <asm/sections.h>
37 #include <asm/time.h>
38 #include <asm/traps.h>
39 #include <asm/wbflush.h>
40
41 #include <asm/dec/interrupts.h>
42 #include <asm/dec/ioasic.h>
43 #include <asm/dec/ioasic_addrs.h>
44 #include <asm/dec/ioasic_ints.h>
45 #include <asm/dec/kn01.h>
46 #include <asm/dec/kn02.h>
47 #include <asm/dec/kn02ba.h>
48 #include <asm/dec/kn02ca.h>
49 #include <asm/dec/kn03.h>
50 #include <asm/dec/kn230.h>
51 #include <asm/dec/system.h>
52
53
54 extern void dec_machine_restart(char *command);
55 extern void dec_machine_halt(void);
56 extern void dec_machine_power_off(void);
57 extern irqreturn_t dec_intr_halt(int irq, void *dev_id);
58
59 unsigned long dec_kn_slot_base, dec_kn_slot_size;
60
61 EXPORT_SYMBOL(dec_kn_slot_base);
62 EXPORT_SYMBOL(dec_kn_slot_size);
63
64 int dec_tc_bus;
65
66 DEFINE_SPINLOCK(ioasic_ssr_lock);
67 EXPORT_SYMBOL(ioasic_ssr_lock);
68
69 volatile u32 *ioasic_base;
70
71 EXPORT_SYMBOL(ioasic_base);
72
73 /*
74 * IRQ routing and priority tables. Priorites are set as follows:
75 *
76 * KN01 KN230 KN02 KN02-BA KN02-CA KN03
77 *
78 * MEMORY CPU CPU CPU ASIC CPU CPU
79 * RTC CPU CPU CPU ASIC CPU CPU
80 * DMA - - - ASIC ASIC ASIC
81 * SERIAL0 CPU CPU CSR ASIC ASIC ASIC
82 * SERIAL1 - - - ASIC - ASIC
83 * SCSI CPU CPU CSR ASIC ASIC ASIC
84 * ETHERNET CPU * CSR ASIC ASIC ASIC
85 * other - - - ASIC - -
86 * TC2 - - CSR CPU ASIC ASIC
87 * TC1 - - CSR CPU ASIC ASIC
88 * TC0 - - CSR CPU ASIC ASIC
89 * other - CPU - CPU ASIC ASIC
90 * other - - - - CPU CPU
91 *
92 * * -- shared with SCSI
93 */
94
95 int dec_interrupt[DEC_NR_INTS] = {
96 [0 ... DEC_NR_INTS - 1] = -1
97 };
98
99 EXPORT_SYMBOL(dec_interrupt);
100
101 int_ptr cpu_mask_nr_tbl[DEC_MAX_CPU_INTS][2] = {
102 { { .i = ~0 }, { .p = dec_intr_unimplemented } },
103 };
104 int_ptr asic_mask_nr_tbl[DEC_MAX_ASIC_INTS][2] = {
105 { { .i = ~0 }, { .p = asic_intr_unimplemented } },
106 };
107 int cpu_fpu_mask = DEC_CPU_IRQ_MASK(DEC_CPU_INR_FPU);
108 int *fpu_kstat_irq;
109
110 static struct irqaction ioirq = {
111 .handler = no_action,
112 .name = "cascade",
113 .flags = IRQF_NO_THREAD,
114 };
115 static struct irqaction fpuirq = {
116 .handler = no_action,
117 .name = "fpu",
118 .flags = IRQF_NO_THREAD,
119 };
120
121 static struct irqaction busirq = {
122 .name = "bus error",
123 .flags = IRQF_NO_THREAD,
124 };
125
126 static struct irqaction haltirq = {
127 .handler = dec_intr_halt,
128 .name = "halt",
129 .flags = IRQF_NO_THREAD,
130 };
131
132
133 /*
134 * Bus error (DBE/IBE exceptions and bus interrupts) handling setup.
135 */
dec_be_init(void)136 static void __init dec_be_init(void)
137 {
138 switch (mips_machtype) {
139 case MACH_DS23100: /* DS2100/DS3100 Pmin/Pmax */
140 board_be_handler = dec_kn01_be_handler;
141 busirq.handler = dec_kn01_be_interrupt;
142 busirq.flags |= IRQF_SHARED;
143 dec_kn01_be_init();
144 break;
145 case MACH_DS5000_1XX: /* DS5000/1xx 3min */
146 case MACH_DS5000_XX: /* DS5000/xx Maxine */
147 board_be_handler = dec_kn02xa_be_handler;
148 busirq.handler = dec_kn02xa_be_interrupt;
149 dec_kn02xa_be_init();
150 break;
151 case MACH_DS5000_200: /* DS5000/200 3max */
152 case MACH_DS5000_2X0: /* DS5000/240 3max+ */
153 case MACH_DS5900: /* DS5900 bigmax */
154 board_be_handler = dec_ecc_be_handler;
155 busirq.handler = dec_ecc_be_interrupt;
156 dec_ecc_be_init();
157 break;
158 }
159 }
160
plat_mem_setup(void)161 void __init plat_mem_setup(void)
162 {
163 board_be_init = dec_be_init;
164
165 wbflush_setup();
166
167 _machine_restart = dec_machine_restart;
168 _machine_halt = dec_machine_halt;
169 pm_power_off = dec_machine_power_off;
170
171 ioport_resource.start = ~0UL;
172 ioport_resource.end = 0UL;
173
174 /* Stay away from the firmware working memory area for now. */
175 memblock_reserve(PHYS_OFFSET, __pa_symbol(&_text) - PHYS_OFFSET);
176 }
177
178 /*
179 * Machine-specific initialisation for KN01, aka DS2100 (aka Pmin)
180 * or DS3100 (aka Pmax).
181 */
182 static int kn01_interrupt[DEC_NR_INTS] __initdata = {
183 [DEC_IRQ_CASCADE] = -1,
184 [DEC_IRQ_AB_RECV] = -1,
185 [DEC_IRQ_AB_XMIT] = -1,
186 [DEC_IRQ_DZ11] = DEC_CPU_IRQ_NR(KN01_CPU_INR_DZ11),
187 [DEC_IRQ_ASC] = -1,
188 [DEC_IRQ_FLOPPY] = -1,
189 [DEC_IRQ_FPU] = DEC_CPU_IRQ_NR(DEC_CPU_INR_FPU),
190 [DEC_IRQ_HALT] = -1,
191 [DEC_IRQ_ISDN] = -1,
192 [DEC_IRQ_LANCE] = DEC_CPU_IRQ_NR(KN01_CPU_INR_LANCE),
193 [DEC_IRQ_BUS] = DEC_CPU_IRQ_NR(KN01_CPU_INR_BUS),
194 [DEC_IRQ_PSU] = -1,
195 [DEC_IRQ_RTC] = DEC_CPU_IRQ_NR(KN01_CPU_INR_RTC),
196 [DEC_IRQ_SCC0] = -1,
197 [DEC_IRQ_SCC1] = -1,
198 [DEC_IRQ_SII] = DEC_CPU_IRQ_NR(KN01_CPU_INR_SII),
199 [DEC_IRQ_TC0] = -1,
200 [DEC_IRQ_TC1] = -1,
201 [DEC_IRQ_TC2] = -1,
202 [DEC_IRQ_TIMER] = -1,
203 [DEC_IRQ_VIDEO] = DEC_CPU_IRQ_NR(KN01_CPU_INR_VIDEO),
204 [DEC_IRQ_ASC_MERR] = -1,
205 [DEC_IRQ_ASC_ERR] = -1,
206 [DEC_IRQ_ASC_DMA] = -1,
207 [DEC_IRQ_FLOPPY_ERR] = -1,
208 [DEC_IRQ_ISDN_ERR] = -1,
209 [DEC_IRQ_ISDN_RXDMA] = -1,
210 [DEC_IRQ_ISDN_TXDMA] = -1,
211 [DEC_IRQ_LANCE_MERR] = -1,
212 [DEC_IRQ_SCC0A_RXERR] = -1,
213 [DEC_IRQ_SCC0A_RXDMA] = -1,
214 [DEC_IRQ_SCC0A_TXERR] = -1,
215 [DEC_IRQ_SCC0A_TXDMA] = -1,
216 [DEC_IRQ_AB_RXERR] = -1,
217 [DEC_IRQ_AB_RXDMA] = -1,
218 [DEC_IRQ_AB_TXERR] = -1,
219 [DEC_IRQ_AB_TXDMA] = -1,
220 [DEC_IRQ_SCC1A_RXERR] = -1,
221 [DEC_IRQ_SCC1A_RXDMA] = -1,
222 [DEC_IRQ_SCC1A_TXERR] = -1,
223 [DEC_IRQ_SCC1A_TXDMA] = -1,
224 };
225
226 static int_ptr kn01_cpu_mask_nr_tbl[][2] __initdata = {
227 { { .i = DEC_CPU_IRQ_MASK(KN01_CPU_INR_BUS) },
228 { .i = DEC_CPU_IRQ_NR(KN01_CPU_INR_BUS) } },
229 { { .i = DEC_CPU_IRQ_MASK(KN01_CPU_INR_RTC) },
230 { .i = DEC_CPU_IRQ_NR(KN01_CPU_INR_RTC) } },
231 { { .i = DEC_CPU_IRQ_MASK(KN01_CPU_INR_DZ11) },
232 { .i = DEC_CPU_IRQ_NR(KN01_CPU_INR_DZ11) } },
233 { { .i = DEC_CPU_IRQ_MASK(KN01_CPU_INR_SII) },
234 { .i = DEC_CPU_IRQ_NR(KN01_CPU_INR_SII) } },
235 { { .i = DEC_CPU_IRQ_MASK(KN01_CPU_INR_LANCE) },
236 { .i = DEC_CPU_IRQ_NR(KN01_CPU_INR_LANCE) } },
237 { { .i = DEC_CPU_IRQ_ALL },
238 { .p = cpu_all_int } },
239 };
240
dec_init_kn01(void)241 static void __init dec_init_kn01(void)
242 {
243 /* IRQ routing. */
244 memcpy(&dec_interrupt, &kn01_interrupt,
245 sizeof(kn01_interrupt));
246
247 /* CPU IRQ priorities. */
248 memcpy(&cpu_mask_nr_tbl, &kn01_cpu_mask_nr_tbl,
249 sizeof(kn01_cpu_mask_nr_tbl));
250
251 mips_cpu_irq_init();
252
253 } /* dec_init_kn01 */
254
255
256 /*
257 * Machine-specific initialisation for KN230, aka DS5100, aka MIPSmate.
258 */
259 static int kn230_interrupt[DEC_NR_INTS] __initdata = {
260 [DEC_IRQ_CASCADE] = -1,
261 [DEC_IRQ_AB_RECV] = -1,
262 [DEC_IRQ_AB_XMIT] = -1,
263 [DEC_IRQ_DZ11] = DEC_CPU_IRQ_NR(KN230_CPU_INR_DZ11),
264 [DEC_IRQ_ASC] = -1,
265 [DEC_IRQ_FLOPPY] = -1,
266 [DEC_IRQ_FPU] = DEC_CPU_IRQ_NR(DEC_CPU_INR_FPU),
267 [DEC_IRQ_HALT] = DEC_CPU_IRQ_NR(KN230_CPU_INR_HALT),
268 [DEC_IRQ_ISDN] = -1,
269 [DEC_IRQ_LANCE] = DEC_CPU_IRQ_NR(KN230_CPU_INR_LANCE),
270 [DEC_IRQ_BUS] = DEC_CPU_IRQ_NR(KN230_CPU_INR_BUS),
271 [DEC_IRQ_PSU] = -1,
272 [DEC_IRQ_RTC] = DEC_CPU_IRQ_NR(KN230_CPU_INR_RTC),
273 [DEC_IRQ_SCC0] = -1,
274 [DEC_IRQ_SCC1] = -1,
275 [DEC_IRQ_SII] = DEC_CPU_IRQ_NR(KN230_CPU_INR_SII),
276 [DEC_IRQ_TC0] = -1,
277 [DEC_IRQ_TC1] = -1,
278 [DEC_IRQ_TC2] = -1,
279 [DEC_IRQ_TIMER] = -1,
280 [DEC_IRQ_VIDEO] = -1,
281 [DEC_IRQ_ASC_MERR] = -1,
282 [DEC_IRQ_ASC_ERR] = -1,
283 [DEC_IRQ_ASC_DMA] = -1,
284 [DEC_IRQ_FLOPPY_ERR] = -1,
285 [DEC_IRQ_ISDN_ERR] = -1,
286 [DEC_IRQ_ISDN_RXDMA] = -1,
287 [DEC_IRQ_ISDN_TXDMA] = -1,
288 [DEC_IRQ_LANCE_MERR] = -1,
289 [DEC_IRQ_SCC0A_RXERR] = -1,
290 [DEC_IRQ_SCC0A_RXDMA] = -1,
291 [DEC_IRQ_SCC0A_TXERR] = -1,
292 [DEC_IRQ_SCC0A_TXDMA] = -1,
293 [DEC_IRQ_AB_RXERR] = -1,
294 [DEC_IRQ_AB_RXDMA] = -1,
295 [DEC_IRQ_AB_TXERR] = -1,
296 [DEC_IRQ_AB_TXDMA] = -1,
297 [DEC_IRQ_SCC1A_RXERR] = -1,
298 [DEC_IRQ_SCC1A_RXDMA] = -1,
299 [DEC_IRQ_SCC1A_TXERR] = -1,
300 [DEC_IRQ_SCC1A_TXDMA] = -1,
301 };
302
303 static int_ptr kn230_cpu_mask_nr_tbl[][2] __initdata = {
304 { { .i = DEC_CPU_IRQ_MASK(KN230_CPU_INR_BUS) },
305 { .i = DEC_CPU_IRQ_NR(KN230_CPU_INR_BUS) } },
306 { { .i = DEC_CPU_IRQ_MASK(KN230_CPU_INR_RTC) },
307 { .i = DEC_CPU_IRQ_NR(KN230_CPU_INR_RTC) } },
308 { { .i = DEC_CPU_IRQ_MASK(KN230_CPU_INR_DZ11) },
309 { .i = DEC_CPU_IRQ_NR(KN230_CPU_INR_DZ11) } },
310 { { .i = DEC_CPU_IRQ_MASK(KN230_CPU_INR_SII) },
311 { .i = DEC_CPU_IRQ_NR(KN230_CPU_INR_SII) } },
312 { { .i = DEC_CPU_IRQ_ALL },
313 { .p = cpu_all_int } },
314 };
315
dec_init_kn230(void)316 static void __init dec_init_kn230(void)
317 {
318 /* IRQ routing. */
319 memcpy(&dec_interrupt, &kn230_interrupt,
320 sizeof(kn230_interrupt));
321
322 /* CPU IRQ priorities. */
323 memcpy(&cpu_mask_nr_tbl, &kn230_cpu_mask_nr_tbl,
324 sizeof(kn230_cpu_mask_nr_tbl));
325
326 mips_cpu_irq_init();
327
328 } /* dec_init_kn230 */
329
330
331 /*
332 * Machine-specific initialisation for KN02, aka DS5000/200, aka 3max.
333 */
334 static int kn02_interrupt[DEC_NR_INTS] __initdata = {
335 [DEC_IRQ_CASCADE] = DEC_CPU_IRQ_NR(KN02_CPU_INR_CASCADE),
336 [DEC_IRQ_AB_RECV] = -1,
337 [DEC_IRQ_AB_XMIT] = -1,
338 [DEC_IRQ_DZ11] = KN02_IRQ_NR(KN02_CSR_INR_DZ11),
339 [DEC_IRQ_ASC] = KN02_IRQ_NR(KN02_CSR_INR_ASC),
340 [DEC_IRQ_FLOPPY] = -1,
341 [DEC_IRQ_FPU] = DEC_CPU_IRQ_NR(DEC_CPU_INR_FPU),
342 [DEC_IRQ_HALT] = -1,
343 [DEC_IRQ_ISDN] = -1,
344 [DEC_IRQ_LANCE] = KN02_IRQ_NR(KN02_CSR_INR_LANCE),
345 [DEC_IRQ_BUS] = DEC_CPU_IRQ_NR(KN02_CPU_INR_BUS),
346 [DEC_IRQ_PSU] = -1,
347 [DEC_IRQ_RTC] = DEC_CPU_IRQ_NR(KN02_CPU_INR_RTC),
348 [DEC_IRQ_SCC0] = -1,
349 [DEC_IRQ_SCC1] = -1,
350 [DEC_IRQ_SII] = -1,
351 [DEC_IRQ_TC0] = KN02_IRQ_NR(KN02_CSR_INR_TC0),
352 [DEC_IRQ_TC1] = KN02_IRQ_NR(KN02_CSR_INR_TC1),
353 [DEC_IRQ_TC2] = KN02_IRQ_NR(KN02_CSR_INR_TC2),
354 [DEC_IRQ_TIMER] = -1,
355 [DEC_IRQ_VIDEO] = -1,
356 [DEC_IRQ_ASC_MERR] = -1,
357 [DEC_IRQ_ASC_ERR] = -1,
358 [DEC_IRQ_ASC_DMA] = -1,
359 [DEC_IRQ_FLOPPY_ERR] = -1,
360 [DEC_IRQ_ISDN_ERR] = -1,
361 [DEC_IRQ_ISDN_RXDMA] = -1,
362 [DEC_IRQ_ISDN_TXDMA] = -1,
363 [DEC_IRQ_LANCE_MERR] = -1,
364 [DEC_IRQ_SCC0A_RXERR] = -1,
365 [DEC_IRQ_SCC0A_RXDMA] = -1,
366 [DEC_IRQ_SCC0A_TXERR] = -1,
367 [DEC_IRQ_SCC0A_TXDMA] = -1,
368 [DEC_IRQ_AB_RXERR] = -1,
369 [DEC_IRQ_AB_RXDMA] = -1,
370 [DEC_IRQ_AB_TXERR] = -1,
371 [DEC_IRQ_AB_TXDMA] = -1,
372 [DEC_IRQ_SCC1A_RXERR] = -1,
373 [DEC_IRQ_SCC1A_RXDMA] = -1,
374 [DEC_IRQ_SCC1A_TXERR] = -1,
375 [DEC_IRQ_SCC1A_TXDMA] = -1,
376 };
377
378 static int_ptr kn02_cpu_mask_nr_tbl[][2] __initdata = {
379 { { .i = DEC_CPU_IRQ_MASK(KN02_CPU_INR_BUS) },
380 { .i = DEC_CPU_IRQ_NR(KN02_CPU_INR_BUS) } },
381 { { .i = DEC_CPU_IRQ_MASK(KN02_CPU_INR_RTC) },
382 { .i = DEC_CPU_IRQ_NR(KN02_CPU_INR_RTC) } },
383 { { .i = DEC_CPU_IRQ_MASK(KN02_CPU_INR_CASCADE) },
384 { .p = kn02_io_int } },
385 { { .i = DEC_CPU_IRQ_ALL },
386 { .p = cpu_all_int } },
387 };
388
389 static int_ptr kn02_asic_mask_nr_tbl[][2] __initdata = {
390 { { .i = KN02_IRQ_MASK(KN02_CSR_INR_DZ11) },
391 { .i = KN02_IRQ_NR(KN02_CSR_INR_DZ11) } },
392 { { .i = KN02_IRQ_MASK(KN02_CSR_INR_ASC) },
393 { .i = KN02_IRQ_NR(KN02_CSR_INR_ASC) } },
394 { { .i = KN02_IRQ_MASK(KN02_CSR_INR_LANCE) },
395 { .i = KN02_IRQ_NR(KN02_CSR_INR_LANCE) } },
396 { { .i = KN02_IRQ_MASK(KN02_CSR_INR_TC2) },
397 { .i = KN02_IRQ_NR(KN02_CSR_INR_TC2) } },
398 { { .i = KN02_IRQ_MASK(KN02_CSR_INR_TC1) },
399 { .i = KN02_IRQ_NR(KN02_CSR_INR_TC1) } },
400 { { .i = KN02_IRQ_MASK(KN02_CSR_INR_TC0) },
401 { .i = KN02_IRQ_NR(KN02_CSR_INR_TC0) } },
402 { { .i = KN02_IRQ_ALL },
403 { .p = kn02_all_int } },
404 };
405
dec_init_kn02(void)406 static void __init dec_init_kn02(void)
407 {
408 /* IRQ routing. */
409 memcpy(&dec_interrupt, &kn02_interrupt,
410 sizeof(kn02_interrupt));
411
412 /* CPU IRQ priorities. */
413 memcpy(&cpu_mask_nr_tbl, &kn02_cpu_mask_nr_tbl,
414 sizeof(kn02_cpu_mask_nr_tbl));
415
416 /* KN02 CSR IRQ priorities. */
417 memcpy(&asic_mask_nr_tbl, &kn02_asic_mask_nr_tbl,
418 sizeof(kn02_asic_mask_nr_tbl));
419
420 mips_cpu_irq_init();
421 init_kn02_irqs(KN02_IRQ_BASE);
422
423 } /* dec_init_kn02 */
424
425
426 /*
427 * Machine-specific initialisation for KN02-BA, aka DS5000/1xx
428 * (xx = 20, 25, 33), aka 3min. Also applies to KN04(-BA), aka
429 * DS5000/150, aka 4min.
430 */
431 static int kn02ba_interrupt[DEC_NR_INTS] __initdata = {
432 [DEC_IRQ_CASCADE] = DEC_CPU_IRQ_NR(KN02BA_CPU_INR_CASCADE),
433 [DEC_IRQ_AB_RECV] = -1,
434 [DEC_IRQ_AB_XMIT] = -1,
435 [DEC_IRQ_DZ11] = -1,
436 [DEC_IRQ_ASC] = IO_IRQ_NR(KN02BA_IO_INR_ASC),
437 [DEC_IRQ_FLOPPY] = -1,
438 [DEC_IRQ_FPU] = DEC_CPU_IRQ_NR(DEC_CPU_INR_FPU),
439 [DEC_IRQ_HALT] = DEC_CPU_IRQ_NR(KN02BA_CPU_INR_HALT),
440 [DEC_IRQ_ISDN] = -1,
441 [DEC_IRQ_LANCE] = IO_IRQ_NR(KN02BA_IO_INR_LANCE),
442 [DEC_IRQ_BUS] = IO_IRQ_NR(KN02BA_IO_INR_BUS),
443 [DEC_IRQ_PSU] = IO_IRQ_NR(KN02BA_IO_INR_PSU),
444 [DEC_IRQ_RTC] = IO_IRQ_NR(KN02BA_IO_INR_RTC),
445 [DEC_IRQ_SCC0] = IO_IRQ_NR(KN02BA_IO_INR_SCC0),
446 [DEC_IRQ_SCC1] = IO_IRQ_NR(KN02BA_IO_INR_SCC1),
447 [DEC_IRQ_SII] = -1,
448 [DEC_IRQ_TC0] = DEC_CPU_IRQ_NR(KN02BA_CPU_INR_TC0),
449 [DEC_IRQ_TC1] = DEC_CPU_IRQ_NR(KN02BA_CPU_INR_TC1),
450 [DEC_IRQ_TC2] = DEC_CPU_IRQ_NR(KN02BA_CPU_INR_TC2),
451 [DEC_IRQ_TIMER] = -1,
452 [DEC_IRQ_VIDEO] = -1,
453 [DEC_IRQ_ASC_MERR] = IO_IRQ_NR(IO_INR_ASC_MERR),
454 [DEC_IRQ_ASC_ERR] = IO_IRQ_NR(IO_INR_ASC_ERR),
455 [DEC_IRQ_ASC_DMA] = IO_IRQ_NR(IO_INR_ASC_DMA),
456 [DEC_IRQ_FLOPPY_ERR] = -1,
457 [DEC_IRQ_ISDN_ERR] = -1,
458 [DEC_IRQ_ISDN_RXDMA] = -1,
459 [DEC_IRQ_ISDN_TXDMA] = -1,
460 [DEC_IRQ_LANCE_MERR] = IO_IRQ_NR(IO_INR_LANCE_MERR),
461 [DEC_IRQ_SCC0A_RXERR] = IO_IRQ_NR(IO_INR_SCC0A_RXERR),
462 [DEC_IRQ_SCC0A_RXDMA] = IO_IRQ_NR(IO_INR_SCC0A_RXDMA),
463 [DEC_IRQ_SCC0A_TXERR] = IO_IRQ_NR(IO_INR_SCC0A_TXERR),
464 [DEC_IRQ_SCC0A_TXDMA] = IO_IRQ_NR(IO_INR_SCC0A_TXDMA),
465 [DEC_IRQ_AB_RXERR] = -1,
466 [DEC_IRQ_AB_RXDMA] = -1,
467 [DEC_IRQ_AB_TXERR] = -1,
468 [DEC_IRQ_AB_TXDMA] = -1,
469 [DEC_IRQ_SCC1A_RXERR] = IO_IRQ_NR(IO_INR_SCC1A_RXERR),
470 [DEC_IRQ_SCC1A_RXDMA] = IO_IRQ_NR(IO_INR_SCC1A_RXDMA),
471 [DEC_IRQ_SCC1A_TXERR] = IO_IRQ_NR(IO_INR_SCC1A_TXERR),
472 [DEC_IRQ_SCC1A_TXDMA] = IO_IRQ_NR(IO_INR_SCC1A_TXDMA),
473 };
474
475 static int_ptr kn02ba_cpu_mask_nr_tbl[][2] __initdata = {
476 { { .i = DEC_CPU_IRQ_MASK(KN02BA_CPU_INR_CASCADE) },
477 { .p = kn02xa_io_int } },
478 { { .i = DEC_CPU_IRQ_MASK(KN02BA_CPU_INR_TC2) },
479 { .i = DEC_CPU_IRQ_NR(KN02BA_CPU_INR_TC2) } },
480 { { .i = DEC_CPU_IRQ_MASK(KN02BA_CPU_INR_TC1) },
481 { .i = DEC_CPU_IRQ_NR(KN02BA_CPU_INR_TC1) } },
482 { { .i = DEC_CPU_IRQ_MASK(KN02BA_CPU_INR_TC0) },
483 { .i = DEC_CPU_IRQ_NR(KN02BA_CPU_INR_TC0) } },
484 { { .i = DEC_CPU_IRQ_ALL },
485 { .p = cpu_all_int } },
486 };
487
488 static int_ptr kn02ba_asic_mask_nr_tbl[][2] __initdata = {
489 { { .i = IO_IRQ_MASK(KN02BA_IO_INR_BUS) },
490 { .i = IO_IRQ_NR(KN02BA_IO_INR_BUS) } },
491 { { .i = IO_IRQ_MASK(KN02BA_IO_INR_RTC) },
492 { .i = IO_IRQ_NR(KN02BA_IO_INR_RTC) } },
493 { { .i = IO_IRQ_DMA },
494 { .p = asic_dma_int } },
495 { { .i = IO_IRQ_MASK(KN02BA_IO_INR_SCC0) },
496 { .i = IO_IRQ_NR(KN02BA_IO_INR_SCC0) } },
497 { { .i = IO_IRQ_MASK(KN02BA_IO_INR_SCC1) },
498 { .i = IO_IRQ_NR(KN02BA_IO_INR_SCC1) } },
499 { { .i = IO_IRQ_MASK(KN02BA_IO_INR_ASC) },
500 { .i = IO_IRQ_NR(KN02BA_IO_INR_ASC) } },
501 { { .i = IO_IRQ_MASK(KN02BA_IO_INR_LANCE) },
502 { .i = IO_IRQ_NR(KN02BA_IO_INR_LANCE) } },
503 { { .i = IO_IRQ_ALL },
504 { .p = asic_all_int } },
505 };
506
dec_init_kn02ba(void)507 static void __init dec_init_kn02ba(void)
508 {
509 /* IRQ routing. */
510 memcpy(&dec_interrupt, &kn02ba_interrupt,
511 sizeof(kn02ba_interrupt));
512
513 /* CPU IRQ priorities. */
514 memcpy(&cpu_mask_nr_tbl, &kn02ba_cpu_mask_nr_tbl,
515 sizeof(kn02ba_cpu_mask_nr_tbl));
516
517 /* I/O ASIC IRQ priorities. */
518 memcpy(&asic_mask_nr_tbl, &kn02ba_asic_mask_nr_tbl,
519 sizeof(kn02ba_asic_mask_nr_tbl));
520
521 mips_cpu_irq_init();
522 init_ioasic_irqs(IO_IRQ_BASE);
523
524 } /* dec_init_kn02ba */
525
526
527 /*
528 * Machine-specific initialisation for KN02-CA, aka DS5000/xx,
529 * (xx = 20, 25, 33), aka MAXine. Also applies to KN04(-CA), aka
530 * DS5000/50, aka 4MAXine.
531 */
532 static int kn02ca_interrupt[DEC_NR_INTS] __initdata = {
533 [DEC_IRQ_CASCADE] = DEC_CPU_IRQ_NR(KN02CA_CPU_INR_CASCADE),
534 [DEC_IRQ_AB_RECV] = IO_IRQ_NR(KN02CA_IO_INR_AB_RECV),
535 [DEC_IRQ_AB_XMIT] = IO_IRQ_NR(KN02CA_IO_INR_AB_XMIT),
536 [DEC_IRQ_DZ11] = -1,
537 [DEC_IRQ_ASC] = IO_IRQ_NR(KN02CA_IO_INR_ASC),
538 [DEC_IRQ_FLOPPY] = IO_IRQ_NR(KN02CA_IO_INR_FLOPPY),
539 [DEC_IRQ_FPU] = DEC_CPU_IRQ_NR(DEC_CPU_INR_FPU),
540 [DEC_IRQ_HALT] = DEC_CPU_IRQ_NR(KN02CA_CPU_INR_HALT),
541 [DEC_IRQ_ISDN] = IO_IRQ_NR(KN02CA_IO_INR_ISDN),
542 [DEC_IRQ_LANCE] = IO_IRQ_NR(KN02CA_IO_INR_LANCE),
543 [DEC_IRQ_BUS] = DEC_CPU_IRQ_NR(KN02CA_CPU_INR_BUS),
544 [DEC_IRQ_PSU] = -1,
545 [DEC_IRQ_RTC] = DEC_CPU_IRQ_NR(KN02CA_CPU_INR_RTC),
546 [DEC_IRQ_SCC0] = IO_IRQ_NR(KN02CA_IO_INR_SCC0),
547 [DEC_IRQ_SCC1] = -1,
548 [DEC_IRQ_SII] = -1,
549 [DEC_IRQ_TC0] = IO_IRQ_NR(KN02CA_IO_INR_TC0),
550 [DEC_IRQ_TC1] = IO_IRQ_NR(KN02CA_IO_INR_TC1),
551 [DEC_IRQ_TC2] = -1,
552 [DEC_IRQ_TIMER] = DEC_CPU_IRQ_NR(KN02CA_CPU_INR_TIMER),
553 [DEC_IRQ_VIDEO] = IO_IRQ_NR(KN02CA_IO_INR_VIDEO),
554 [DEC_IRQ_ASC_MERR] = IO_IRQ_NR(IO_INR_ASC_MERR),
555 [DEC_IRQ_ASC_ERR] = IO_IRQ_NR(IO_INR_ASC_ERR),
556 [DEC_IRQ_ASC_DMA] = IO_IRQ_NR(IO_INR_ASC_DMA),
557 [DEC_IRQ_FLOPPY_ERR] = IO_IRQ_NR(IO_INR_FLOPPY_ERR),
558 [DEC_IRQ_ISDN_ERR] = IO_IRQ_NR(IO_INR_ISDN_ERR),
559 [DEC_IRQ_ISDN_RXDMA] = IO_IRQ_NR(IO_INR_ISDN_RXDMA),
560 [DEC_IRQ_ISDN_TXDMA] = IO_IRQ_NR(IO_INR_ISDN_TXDMA),
561 [DEC_IRQ_LANCE_MERR] = IO_IRQ_NR(IO_INR_LANCE_MERR),
562 [DEC_IRQ_SCC0A_RXERR] = IO_IRQ_NR(IO_INR_SCC0A_RXERR),
563 [DEC_IRQ_SCC0A_RXDMA] = IO_IRQ_NR(IO_INR_SCC0A_RXDMA),
564 [DEC_IRQ_SCC0A_TXERR] = IO_IRQ_NR(IO_INR_SCC0A_TXERR),
565 [DEC_IRQ_SCC0A_TXDMA] = IO_IRQ_NR(IO_INR_SCC0A_TXDMA),
566 [DEC_IRQ_AB_RXERR] = IO_IRQ_NR(IO_INR_AB_RXERR),
567 [DEC_IRQ_AB_RXDMA] = IO_IRQ_NR(IO_INR_AB_RXDMA),
568 [DEC_IRQ_AB_TXERR] = IO_IRQ_NR(IO_INR_AB_TXERR),
569 [DEC_IRQ_AB_TXDMA] = IO_IRQ_NR(IO_INR_AB_TXDMA),
570 [DEC_IRQ_SCC1A_RXERR] = -1,
571 [DEC_IRQ_SCC1A_RXDMA] = -1,
572 [DEC_IRQ_SCC1A_TXERR] = -1,
573 [DEC_IRQ_SCC1A_TXDMA] = -1,
574 };
575
576 static int_ptr kn02ca_cpu_mask_nr_tbl[][2] __initdata = {
577 { { .i = DEC_CPU_IRQ_MASK(KN02CA_CPU_INR_BUS) },
578 { .i = DEC_CPU_IRQ_NR(KN02CA_CPU_INR_BUS) } },
579 { { .i = DEC_CPU_IRQ_MASK(KN02CA_CPU_INR_RTC) },
580 { .i = DEC_CPU_IRQ_NR(KN02CA_CPU_INR_RTC) } },
581 { { .i = DEC_CPU_IRQ_MASK(KN02CA_CPU_INR_CASCADE) },
582 { .p = kn02xa_io_int } },
583 { { .i = DEC_CPU_IRQ_ALL },
584 { .p = cpu_all_int } },
585 };
586
587 static int_ptr kn02ca_asic_mask_nr_tbl[][2] __initdata = {
588 { { .i = IO_IRQ_DMA },
589 { .p = asic_dma_int } },
590 { { .i = IO_IRQ_MASK(KN02CA_IO_INR_SCC0) },
591 { .i = IO_IRQ_NR(KN02CA_IO_INR_SCC0) } },
592 { { .i = IO_IRQ_MASK(KN02CA_IO_INR_ASC) },
593 { .i = IO_IRQ_NR(KN02CA_IO_INR_ASC) } },
594 { { .i = IO_IRQ_MASK(KN02CA_IO_INR_LANCE) },
595 { .i = IO_IRQ_NR(KN02CA_IO_INR_LANCE) } },
596 { { .i = IO_IRQ_MASK(KN02CA_IO_INR_TC1) },
597 { .i = IO_IRQ_NR(KN02CA_IO_INR_TC1) } },
598 { { .i = IO_IRQ_MASK(KN02CA_IO_INR_TC0) },
599 { .i = IO_IRQ_NR(KN02CA_IO_INR_TC0) } },
600 { { .i = IO_IRQ_ALL },
601 { .p = asic_all_int } },
602 };
603
dec_init_kn02ca(void)604 static void __init dec_init_kn02ca(void)
605 {
606 /* IRQ routing. */
607 memcpy(&dec_interrupt, &kn02ca_interrupt,
608 sizeof(kn02ca_interrupt));
609
610 /* CPU IRQ priorities. */
611 memcpy(&cpu_mask_nr_tbl, &kn02ca_cpu_mask_nr_tbl,
612 sizeof(kn02ca_cpu_mask_nr_tbl));
613
614 /* I/O ASIC IRQ priorities. */
615 memcpy(&asic_mask_nr_tbl, &kn02ca_asic_mask_nr_tbl,
616 sizeof(kn02ca_asic_mask_nr_tbl));
617
618 mips_cpu_irq_init();
619 init_ioasic_irqs(IO_IRQ_BASE);
620
621 } /* dec_init_kn02ca */
622
623
624 /*
625 * Machine-specific initialisation for KN03, aka DS5000/240,
626 * aka 3max+ and DS5900, aka BIGmax. Also applies to KN05, aka
627 * DS5000/260, aka 4max+ and DS5900/260.
628 */
629 static int kn03_interrupt[DEC_NR_INTS] __initdata = {
630 [DEC_IRQ_CASCADE] = DEC_CPU_IRQ_NR(KN03_CPU_INR_CASCADE),
631 [DEC_IRQ_AB_RECV] = -1,
632 [DEC_IRQ_AB_XMIT] = -1,
633 [DEC_IRQ_DZ11] = -1,
634 [DEC_IRQ_ASC] = IO_IRQ_NR(KN03_IO_INR_ASC),
635 [DEC_IRQ_FLOPPY] = -1,
636 [DEC_IRQ_FPU] = DEC_CPU_IRQ_NR(DEC_CPU_INR_FPU),
637 [DEC_IRQ_HALT] = DEC_CPU_IRQ_NR(KN03_CPU_INR_HALT),
638 [DEC_IRQ_ISDN] = -1,
639 [DEC_IRQ_LANCE] = IO_IRQ_NR(KN03_IO_INR_LANCE),
640 [DEC_IRQ_BUS] = DEC_CPU_IRQ_NR(KN03_CPU_INR_BUS),
641 [DEC_IRQ_PSU] = IO_IRQ_NR(KN03_IO_INR_PSU),
642 [DEC_IRQ_RTC] = DEC_CPU_IRQ_NR(KN03_CPU_INR_RTC),
643 [DEC_IRQ_SCC0] = IO_IRQ_NR(KN03_IO_INR_SCC0),
644 [DEC_IRQ_SCC1] = IO_IRQ_NR(KN03_IO_INR_SCC1),
645 [DEC_IRQ_SII] = -1,
646 [DEC_IRQ_TC0] = IO_IRQ_NR(KN03_IO_INR_TC0),
647 [DEC_IRQ_TC1] = IO_IRQ_NR(KN03_IO_INR_TC1),
648 [DEC_IRQ_TC2] = IO_IRQ_NR(KN03_IO_INR_TC2),
649 [DEC_IRQ_TIMER] = -1,
650 [DEC_IRQ_VIDEO] = -1,
651 [DEC_IRQ_ASC_MERR] = IO_IRQ_NR(IO_INR_ASC_MERR),
652 [DEC_IRQ_ASC_ERR] = IO_IRQ_NR(IO_INR_ASC_ERR),
653 [DEC_IRQ_ASC_DMA] = IO_IRQ_NR(IO_INR_ASC_DMA),
654 [DEC_IRQ_FLOPPY_ERR] = -1,
655 [DEC_IRQ_ISDN_ERR] = -1,
656 [DEC_IRQ_ISDN_RXDMA] = -1,
657 [DEC_IRQ_ISDN_TXDMA] = -1,
658 [DEC_IRQ_LANCE_MERR] = IO_IRQ_NR(IO_INR_LANCE_MERR),
659 [DEC_IRQ_SCC0A_RXERR] = IO_IRQ_NR(IO_INR_SCC0A_RXERR),
660 [DEC_IRQ_SCC0A_RXDMA] = IO_IRQ_NR(IO_INR_SCC0A_RXDMA),
661 [DEC_IRQ_SCC0A_TXERR] = IO_IRQ_NR(IO_INR_SCC0A_TXERR),
662 [DEC_IRQ_SCC0A_TXDMA] = IO_IRQ_NR(IO_INR_SCC0A_TXDMA),
663 [DEC_IRQ_AB_RXERR] = -1,
664 [DEC_IRQ_AB_RXDMA] = -1,
665 [DEC_IRQ_AB_TXERR] = -1,
666 [DEC_IRQ_AB_TXDMA] = -1,
667 [DEC_IRQ_SCC1A_RXERR] = IO_IRQ_NR(IO_INR_SCC1A_RXERR),
668 [DEC_IRQ_SCC1A_RXDMA] = IO_IRQ_NR(IO_INR_SCC1A_RXDMA),
669 [DEC_IRQ_SCC1A_TXERR] = IO_IRQ_NR(IO_INR_SCC1A_TXERR),
670 [DEC_IRQ_SCC1A_TXDMA] = IO_IRQ_NR(IO_INR_SCC1A_TXDMA),
671 };
672
673 static int_ptr kn03_cpu_mask_nr_tbl[][2] __initdata = {
674 { { .i = DEC_CPU_IRQ_MASK(KN03_CPU_INR_BUS) },
675 { .i = DEC_CPU_IRQ_NR(KN03_CPU_INR_BUS) } },
676 { { .i = DEC_CPU_IRQ_MASK(KN03_CPU_INR_RTC) },
677 { .i = DEC_CPU_IRQ_NR(KN03_CPU_INR_RTC) } },
678 { { .i = DEC_CPU_IRQ_MASK(KN03_CPU_INR_CASCADE) },
679 { .p = kn03_io_int } },
680 { { .i = DEC_CPU_IRQ_ALL },
681 { .p = cpu_all_int } },
682 };
683
684 static int_ptr kn03_asic_mask_nr_tbl[][2] __initdata = {
685 { { .i = IO_IRQ_DMA },
686 { .p = asic_dma_int } },
687 { { .i = IO_IRQ_MASK(KN03_IO_INR_SCC0) },
688 { .i = IO_IRQ_NR(KN03_IO_INR_SCC0) } },
689 { { .i = IO_IRQ_MASK(KN03_IO_INR_SCC1) },
690 { .i = IO_IRQ_NR(KN03_IO_INR_SCC1) } },
691 { { .i = IO_IRQ_MASK(KN03_IO_INR_ASC) },
692 { .i = IO_IRQ_NR(KN03_IO_INR_ASC) } },
693 { { .i = IO_IRQ_MASK(KN03_IO_INR_LANCE) },
694 { .i = IO_IRQ_NR(KN03_IO_INR_LANCE) } },
695 { { .i = IO_IRQ_MASK(KN03_IO_INR_TC2) },
696 { .i = IO_IRQ_NR(KN03_IO_INR_TC2) } },
697 { { .i = IO_IRQ_MASK(KN03_IO_INR_TC1) },
698 { .i = IO_IRQ_NR(KN03_IO_INR_TC1) } },
699 { { .i = IO_IRQ_MASK(KN03_IO_INR_TC0) },
700 { .i = IO_IRQ_NR(KN03_IO_INR_TC0) } },
701 { { .i = IO_IRQ_ALL },
702 { .p = asic_all_int } },
703 };
704
dec_init_kn03(void)705 static void __init dec_init_kn03(void)
706 {
707 /* IRQ routing. */
708 memcpy(&dec_interrupt, &kn03_interrupt,
709 sizeof(kn03_interrupt));
710
711 /* CPU IRQ priorities. */
712 memcpy(&cpu_mask_nr_tbl, &kn03_cpu_mask_nr_tbl,
713 sizeof(kn03_cpu_mask_nr_tbl));
714
715 /* I/O ASIC IRQ priorities. */
716 memcpy(&asic_mask_nr_tbl, &kn03_asic_mask_nr_tbl,
717 sizeof(kn03_asic_mask_nr_tbl));
718
719 mips_cpu_irq_init();
720 init_ioasic_irqs(IO_IRQ_BASE);
721
722 } /* dec_init_kn03 */
723
724
arch_init_irq(void)725 void __init arch_init_irq(void)
726 {
727 switch (mips_machtype) {
728 case MACH_DS23100: /* DS2100/DS3100 Pmin/Pmax */
729 dec_init_kn01();
730 break;
731 case MACH_DS5100: /* DS5100 MIPSmate */
732 dec_init_kn230();
733 break;
734 case MACH_DS5000_200: /* DS5000/200 3max */
735 dec_init_kn02();
736 break;
737 case MACH_DS5000_1XX: /* DS5000/1xx 3min */
738 dec_init_kn02ba();
739 break;
740 case MACH_DS5000_2X0: /* DS5000/240 3max+ */
741 case MACH_DS5900: /* DS5900 bigmax */
742 dec_init_kn03();
743 break;
744 case MACH_DS5000_XX: /* Personal DS5000/xx */
745 dec_init_kn02ca();
746 break;
747 case MACH_DS5800: /* DS5800 Isis */
748 panic("Don't know how to set this up!");
749 break;
750 case MACH_DS5400: /* DS5400 MIPSfair */
751 panic("Don't know how to set this up!");
752 break;
753 case MACH_DS5500: /* DS5500 MIPSfair-2 */
754 panic("Don't know how to set this up!");
755 break;
756 }
757
758 /* Free the FPU interrupt if the exception is present. */
759 if (!cpu_has_nofpuex) {
760 cpu_fpu_mask = 0;
761 dec_interrupt[DEC_IRQ_FPU] = -1;
762 }
763 /* Free the halt interrupt unused on R4k systems. */
764 if (current_cpu_type() == CPU_R4000SC ||
765 current_cpu_type() == CPU_R4400SC)
766 dec_interrupt[DEC_IRQ_HALT] = -1;
767
768 /* Register board interrupts: FPU and cascade. */
769 if (IS_ENABLED(CONFIG_MIPS_FP_SUPPORT) &&
770 dec_interrupt[DEC_IRQ_FPU] >= 0 && cpu_has_fpu) {
771 struct irq_desc *desc_fpu;
772 int irq_fpu;
773
774 irq_fpu = dec_interrupt[DEC_IRQ_FPU];
775 setup_irq(irq_fpu, &fpuirq);
776 desc_fpu = irq_to_desc(irq_fpu);
777 fpu_kstat_irq = this_cpu_ptr(desc_fpu->kstat_irqs);
778 }
779 if (dec_interrupt[DEC_IRQ_CASCADE] >= 0)
780 setup_irq(dec_interrupt[DEC_IRQ_CASCADE], &ioirq);
781
782 /* Register the bus error interrupt. */
783 if (dec_interrupt[DEC_IRQ_BUS] >= 0 && busirq.handler)
784 setup_irq(dec_interrupt[DEC_IRQ_BUS], &busirq);
785
786 /* Register the HALT interrupt. */
787 if (dec_interrupt[DEC_IRQ_HALT] >= 0)
788 setup_irq(dec_interrupt[DEC_IRQ_HALT], &haltirq);
789 }
790
dec_irq_dispatch(unsigned int irq)791 asmlinkage unsigned int dec_irq_dispatch(unsigned int irq)
792 {
793 do_IRQ(irq);
794 return 0;
795 }
796