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