1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_POWERPC_MPIC_H
3 #define _ASM_POWERPC_MPIC_H
4 #ifdef __KERNEL__
5
6 #include <linux/irq.h>
7 #include <asm/dcr.h>
8 #include <asm/msi_bitmap.h>
9
10 /*
11 * Global registers
12 */
13
14 #define MPIC_GREG_BASE 0x01000
15
16 #define MPIC_GREG_FEATURE_0 0x00000
17 #define MPIC_GREG_FEATURE_LAST_SRC_MASK 0x07ff0000
18 #define MPIC_GREG_FEATURE_LAST_SRC_SHIFT 16
19 #define MPIC_GREG_FEATURE_LAST_CPU_MASK 0x00001f00
20 #define MPIC_GREG_FEATURE_LAST_CPU_SHIFT 8
21 #define MPIC_GREG_FEATURE_VERSION_MASK 0xff
22 #define MPIC_GREG_FEATURE_1 0x00010
23 #define MPIC_GREG_GLOBAL_CONF_0 0x00020
24 #define MPIC_GREG_GCONF_RESET 0x80000000
25 /* On the FSL mpic implementations the Mode field is expand to be
26 * 2 bits wide:
27 * 0b00 = pass through (interrupts routed to IRQ0)
28 * 0b01 = Mixed mode
29 * 0b10 = reserved
30 * 0b11 = External proxy / coreint
31 */
32 #define MPIC_GREG_GCONF_COREINT 0x60000000
33 #define MPIC_GREG_GCONF_8259_PTHROU_DIS 0x20000000
34 #define MPIC_GREG_GCONF_NO_BIAS 0x10000000
35 #define MPIC_GREG_GCONF_BASE_MASK 0x000fffff
36 #define MPIC_GREG_GCONF_MCK 0x08000000
37 #define MPIC_GREG_GLOBAL_CONF_1 0x00030
38 #define MPIC_GREG_VENDOR_0 0x00040
39 #define MPIC_GREG_VENDOR_1 0x00050
40 #define MPIC_GREG_VENDOR_2 0x00060
41 #define MPIC_GREG_VENDOR_3 0x00070
42 #define MPIC_GREG_VENDOR_ID 0x00080
43 #define MPIC_GREG_VENDOR_ID_STEPPING_MASK 0x00ff0000
44 #define MPIC_GREG_VENDOR_ID_STEPPING_SHIFT 16
45 #define MPIC_GREG_VENDOR_ID_DEVICE_ID_MASK 0x0000ff00
46 #define MPIC_GREG_VENDOR_ID_DEVICE_ID_SHIFT 8
47 #define MPIC_GREG_VENDOR_ID_VENDOR_ID_MASK 0x000000ff
48 #define MPIC_GREG_PROCESSOR_INIT 0x00090
49 #define MPIC_GREG_IPI_VECTOR_PRI_0 0x000a0
50 #define MPIC_GREG_IPI_VECTOR_PRI_1 0x000b0
51 #define MPIC_GREG_IPI_VECTOR_PRI_2 0x000c0
52 #define MPIC_GREG_IPI_VECTOR_PRI_3 0x000d0
53 #define MPIC_GREG_IPI_STRIDE 0x10
54 #define MPIC_GREG_SPURIOUS 0x000e0
55 #define MPIC_GREG_TIMER_FREQ 0x000f0
56
57 /*
58 *
59 * Timer registers
60 */
61 #define MPIC_TIMER_BASE 0x01100
62 #define MPIC_TIMER_STRIDE 0x40
63 #define MPIC_TIMER_GROUP_STRIDE 0x1000
64
65 #define MPIC_TIMER_CURRENT_CNT 0x00000
66 #define MPIC_TIMER_BASE_CNT 0x00010
67 #define MPIC_TIMER_VECTOR_PRI 0x00020
68 #define MPIC_TIMER_DESTINATION 0x00030
69
70 /*
71 * Per-Processor registers
72 */
73
74 #define MPIC_CPU_THISBASE 0x00000
75 #define MPIC_CPU_BASE 0x20000
76 #define MPIC_CPU_STRIDE 0x01000
77
78 #define MPIC_CPU_IPI_DISPATCH_0 0x00040
79 #define MPIC_CPU_IPI_DISPATCH_1 0x00050
80 #define MPIC_CPU_IPI_DISPATCH_2 0x00060
81 #define MPIC_CPU_IPI_DISPATCH_3 0x00070
82 #define MPIC_CPU_IPI_DISPATCH_STRIDE 0x00010
83 #define MPIC_CPU_CURRENT_TASK_PRI 0x00080
84 #define MPIC_CPU_TASKPRI_MASK 0x0000000f
85 #define MPIC_CPU_WHOAMI 0x00090
86 #define MPIC_CPU_WHOAMI_MASK 0x0000001f
87 #define MPIC_CPU_INTACK 0x000a0
88 #define MPIC_CPU_EOI 0x000b0
89 #define MPIC_CPU_MCACK 0x000c0
90
91 /*
92 * Per-source registers
93 */
94
95 #define MPIC_IRQ_BASE 0x10000
96 #define MPIC_IRQ_STRIDE 0x00020
97 #define MPIC_IRQ_VECTOR_PRI 0x00000
98 #define MPIC_VECPRI_MASK 0x80000000
99 #define MPIC_VECPRI_ACTIVITY 0x40000000 /* Read Only */
100 #define MPIC_VECPRI_PRIORITY_MASK 0x000f0000
101 #define MPIC_VECPRI_PRIORITY_SHIFT 16
102 #define MPIC_VECPRI_VECTOR_MASK 0x000007ff
103 #define MPIC_VECPRI_POLARITY_POSITIVE 0x00800000
104 #define MPIC_VECPRI_POLARITY_NEGATIVE 0x00000000
105 #define MPIC_VECPRI_POLARITY_MASK 0x00800000
106 #define MPIC_VECPRI_SENSE_LEVEL 0x00400000
107 #define MPIC_VECPRI_SENSE_EDGE 0x00000000
108 #define MPIC_VECPRI_SENSE_MASK 0x00400000
109 #define MPIC_IRQ_DESTINATION 0x00010
110
111 #define MPIC_FSL_BRR1 0x00000
112 #define MPIC_FSL_BRR1_VER 0x0000ffff
113
114 #define MPIC_MAX_IRQ_SOURCES 2048
115 #define MPIC_MAX_CPUS 32
116 #define MPIC_MAX_ISU 32
117
118 #define MPIC_MAX_ERR 32
119 #define MPIC_FSL_ERR_INT 16
120
121 /*
122 * Tsi108 implementation of MPIC has many differences from the original one
123 */
124
125 /*
126 * Global registers
127 */
128
129 #define TSI108_GREG_BASE 0x00000
130 #define TSI108_GREG_FEATURE_0 0x00000
131 #define TSI108_GREG_GLOBAL_CONF_0 0x00004
132 #define TSI108_GREG_VENDOR_ID 0x0000c
133 #define TSI108_GREG_IPI_VECTOR_PRI_0 0x00204 /* Doorbell 0 */
134 #define TSI108_GREG_IPI_STRIDE 0x0c
135 #define TSI108_GREG_SPURIOUS 0x00010
136 #define TSI108_GREG_TIMER_FREQ 0x00014
137
138 /*
139 * Timer registers
140 */
141 #define TSI108_TIMER_BASE 0x0030
142 #define TSI108_TIMER_STRIDE 0x10
143 #define TSI108_TIMER_CURRENT_CNT 0x00000
144 #define TSI108_TIMER_BASE_CNT 0x00004
145 #define TSI108_TIMER_VECTOR_PRI 0x00008
146 #define TSI108_TIMER_DESTINATION 0x0000c
147
148 /*
149 * Per-Processor registers
150 */
151 #define TSI108_CPU_BASE 0x00300
152 #define TSI108_CPU_STRIDE 0x00040
153 #define TSI108_CPU_IPI_DISPATCH_0 0x00200
154 #define TSI108_CPU_IPI_DISPATCH_STRIDE 0x00000
155 #define TSI108_CPU_CURRENT_TASK_PRI 0x00000
156 #define TSI108_CPU_WHOAMI 0xffffffff
157 #define TSI108_CPU_INTACK 0x00004
158 #define TSI108_CPU_EOI 0x00008
159 #define TSI108_CPU_MCACK 0x00004 /* Doesn't really exist here */
160
161 /*
162 * Per-source registers
163 */
164 #define TSI108_IRQ_BASE 0x00100
165 #define TSI108_IRQ_STRIDE 0x00008
166 #define TSI108_IRQ_VECTOR_PRI 0x00000
167 #define TSI108_VECPRI_VECTOR_MASK 0x000000ff
168 #define TSI108_VECPRI_POLARITY_POSITIVE 0x01000000
169 #define TSI108_VECPRI_POLARITY_NEGATIVE 0x00000000
170 #define TSI108_VECPRI_SENSE_LEVEL 0x02000000
171 #define TSI108_VECPRI_SENSE_EDGE 0x00000000
172 #define TSI108_VECPRI_POLARITY_MASK 0x01000000
173 #define TSI108_VECPRI_SENSE_MASK 0x02000000
174 #define TSI108_IRQ_DESTINATION 0x00004
175
176 /* weird mpic register indices and mask bits in the HW info array */
177 enum {
178 MPIC_IDX_GREG_BASE = 0,
179 MPIC_IDX_GREG_FEATURE_0,
180 MPIC_IDX_GREG_GLOBAL_CONF_0,
181 MPIC_IDX_GREG_VENDOR_ID,
182 MPIC_IDX_GREG_IPI_VECTOR_PRI_0,
183 MPIC_IDX_GREG_IPI_STRIDE,
184 MPIC_IDX_GREG_SPURIOUS,
185 MPIC_IDX_GREG_TIMER_FREQ,
186
187 MPIC_IDX_TIMER_BASE,
188 MPIC_IDX_TIMER_STRIDE,
189 MPIC_IDX_TIMER_CURRENT_CNT,
190 MPIC_IDX_TIMER_BASE_CNT,
191 MPIC_IDX_TIMER_VECTOR_PRI,
192 MPIC_IDX_TIMER_DESTINATION,
193
194 MPIC_IDX_CPU_BASE,
195 MPIC_IDX_CPU_STRIDE,
196 MPIC_IDX_CPU_IPI_DISPATCH_0,
197 MPIC_IDX_CPU_IPI_DISPATCH_STRIDE,
198 MPIC_IDX_CPU_CURRENT_TASK_PRI,
199 MPIC_IDX_CPU_WHOAMI,
200 MPIC_IDX_CPU_INTACK,
201 MPIC_IDX_CPU_EOI,
202 MPIC_IDX_CPU_MCACK,
203
204 MPIC_IDX_IRQ_BASE,
205 MPIC_IDX_IRQ_STRIDE,
206 MPIC_IDX_IRQ_VECTOR_PRI,
207
208 MPIC_IDX_VECPRI_VECTOR_MASK,
209 MPIC_IDX_VECPRI_POLARITY_POSITIVE,
210 MPIC_IDX_VECPRI_POLARITY_NEGATIVE,
211 MPIC_IDX_VECPRI_SENSE_LEVEL,
212 MPIC_IDX_VECPRI_SENSE_EDGE,
213 MPIC_IDX_VECPRI_POLARITY_MASK,
214 MPIC_IDX_VECPRI_SENSE_MASK,
215 MPIC_IDX_IRQ_DESTINATION,
216 MPIC_IDX_END
217 };
218
219
220 #ifdef CONFIG_MPIC_U3_HT_IRQS
221 /* Fixup table entry */
222 struct mpic_irq_fixup
223 {
224 u8 __iomem *base;
225 u8 __iomem *applebase;
226 u32 data;
227 unsigned int index;
228 };
229 #endif /* CONFIG_MPIC_U3_HT_IRQS */
230
231
232 enum mpic_reg_type {
233 mpic_access_mmio_le,
234 mpic_access_mmio_be,
235 #ifdef CONFIG_PPC_DCR
236 mpic_access_dcr
237 #endif
238 };
239
240 struct mpic_reg_bank {
241 u32 __iomem *base;
242 #ifdef CONFIG_PPC_DCR
243 dcr_host_t dhost;
244 #endif /* CONFIG_PPC_DCR */
245 };
246
247 struct mpic_irq_save {
248 u32 vecprio,
249 dest;
250 #ifdef CONFIG_MPIC_U3_HT_IRQS
251 u32 fixup_data;
252 #endif
253 };
254
255 /* The instance data of a given MPIC */
256 struct mpic
257 {
258 /* The OpenFirmware dt node for this MPIC */
259 struct device_node *node;
260
261 /* The remapper for this MPIC */
262 struct irq_domain *irqhost;
263
264 /* The "linux" controller struct */
265 struct irq_chip hc_irq;
266 #ifdef CONFIG_MPIC_U3_HT_IRQS
267 struct irq_chip hc_ht_irq;
268 #endif
269 #ifdef CONFIG_SMP
270 struct irq_chip hc_ipi;
271 #endif
272 struct irq_chip hc_tm;
273 struct irq_chip hc_err;
274 const char *name;
275 /* Flags */
276 unsigned int flags;
277 /* How many irq sources in a given ISU */
278 unsigned int isu_size;
279 unsigned int isu_shift;
280 unsigned int isu_mask;
281 /* Number of sources */
282 unsigned int num_sources;
283
284 /* vector numbers used for internal sources (ipi/timers) */
285 unsigned int ipi_vecs[4];
286 unsigned int timer_vecs[8];
287 /* vector numbers used for FSL MPIC error interrupts */
288 unsigned int err_int_vecs[MPIC_MAX_ERR];
289
290 /* Spurious vector to program into unused sources */
291 unsigned int spurious_vec;
292
293 #ifdef CONFIG_MPIC_U3_HT_IRQS
294 /* The fixup table */
295 struct mpic_irq_fixup *fixups;
296 raw_spinlock_t fixup_lock;
297 #endif
298
299 /* Register access method */
300 enum mpic_reg_type reg_type;
301
302 /* The physical base address of the MPIC */
303 phys_addr_t paddr;
304
305 /* The various ioremap'ed bases */
306 struct mpic_reg_bank thiscpuregs;
307 struct mpic_reg_bank gregs;
308 struct mpic_reg_bank tmregs;
309 struct mpic_reg_bank cpuregs[MPIC_MAX_CPUS];
310 struct mpic_reg_bank isus[MPIC_MAX_ISU];
311
312 /* ioremap'ed base for error interrupt registers */
313 u32 __iomem *err_regs;
314
315 /* Protected sources */
316 unsigned long *protected;
317
318 #ifdef CONFIG_MPIC_WEIRD
319 /* Pointer to HW info array */
320 u32 *hw_set;
321 #endif
322
323 #ifdef CONFIG_PCI_MSI
324 struct msi_bitmap msi_bitmap;
325 #endif
326
327 #ifdef CONFIG_MPIC_BROKEN_REGREAD
328 u32 isu_reg0_shadow[MPIC_MAX_IRQ_SOURCES];
329 #endif
330
331 /* link */
332 struct mpic *next;
333
334 #ifdef CONFIG_PM
335 struct mpic_irq_save *save_data;
336 #endif
337 };
338
339 extern struct bus_type mpic_subsys;
340
341 /*
342 * MPIC flags (passed to mpic_alloc)
343 *
344 * The top 4 bits contain an MPIC bhw id that is used to index the
345 * register offsets and some masks when CONFIG_MPIC_WEIRD is set.
346 * Note setting any ID (leaving those bits to 0) means standard MPIC
347 */
348
349 /*
350 * This is a secondary ("chained") controller; it only uses the CPU0
351 * registers. Primary controllers have IPIs and affinity control.
352 */
353 #define MPIC_SECONDARY 0x00000001
354
355 /* Set this for a big-endian MPIC */
356 #define MPIC_BIG_ENDIAN 0x00000002
357 /* Broken U3 MPIC */
358 #define MPIC_U3_HT_IRQS 0x00000004
359 /* Broken IPI registers (autodetected) */
360 #define MPIC_BROKEN_IPI 0x00000008
361 /* Spurious vector requires EOI */
362 #define MPIC_SPV_EOI 0x00000020
363 /* No passthrough disable */
364 #define MPIC_NO_PTHROU_DIS 0x00000040
365 /* DCR based MPIC */
366 #define MPIC_USES_DCR 0x00000080
367 /* MPIC has 11-bit vector fields (or larger) */
368 #define MPIC_LARGE_VECTORS 0x00000100
369 /* Enable delivery of prio 15 interrupts as MCK instead of EE */
370 #define MPIC_ENABLE_MCK 0x00000200
371 /* Disable bias among target selection, spread interrupts evenly */
372 #define MPIC_NO_BIAS 0x00000400
373 /* Destination only supports a single CPU at a time */
374 #define MPIC_SINGLE_DEST_CPU 0x00001000
375 /* Enable CoreInt delivery of interrupts */
376 #define MPIC_ENABLE_COREINT 0x00002000
377 /* Do not reset the MPIC during initialization */
378 #define MPIC_NO_RESET 0x00004000
379 /* Freescale MPIC (compatible includes "fsl,mpic") */
380 #define MPIC_FSL 0x00008000
381 /* Freescale MPIC supports EIMR (error interrupt mask register).
382 * This flag is set for MPIC version >= 4.1 (version determined
383 * from the BRR1 register).
384 */
385 #define MPIC_FSL_HAS_EIMR 0x00010000
386
387 /* MPIC HW modification ID */
388 #define MPIC_REGSET_MASK 0xf0000000
389 #define MPIC_REGSET(val) (((val) & 0xf ) << 28)
390 #define MPIC_GET_REGSET(flags) (((flags) >> 28) & 0xf)
391
392 #define MPIC_REGSET_STANDARD MPIC_REGSET(0) /* Original MPIC */
393 #define MPIC_REGSET_TSI108 MPIC_REGSET(1) /* Tsi108/109 PIC */
394
395 /* Get the version of primary MPIC */
396 #ifdef CONFIG_MPIC
397 extern u32 fsl_mpic_primary_get_version(void);
398 #else
fsl_mpic_primary_get_version(void)399 static inline u32 fsl_mpic_primary_get_version(void)
400 {
401 return 0;
402 }
403 #endif
404
405 /* Allocate the controller structure and setup the linux irq descs
406 * for the range if interrupts passed in. No HW initialization is
407 * actually performed.
408 *
409 * @phys_addr: physial base address of the MPIC
410 * @flags: flags, see constants above
411 * @isu_size: number of interrupts in an ISU. Use 0 to use a
412 * standard ISU-less setup (aka powermac)
413 * @irq_offset: first irq number to assign to this mpic
414 * @irq_count: number of irqs to use with this mpic IRQ sources. Pass 0
415 * to match the number of sources
416 * @ipi_offset: first irq number to assign to this mpic IPI sources,
417 * used only on primary mpic
418 * @senses: array of sense values
419 * @senses_num: number of entries in the array
420 *
421 * Note about the sense array. If none is passed, all interrupts are
422 * setup to be level negative unless MPIC_U3_HT_IRQS is set in which
423 * case they are edge positive (and the array is ignored anyway).
424 * The values in the array start at the first source of the MPIC,
425 * that is senses[0] correspond to linux irq "irq_offset".
426 */
427 extern struct mpic *mpic_alloc(struct device_node *node,
428 phys_addr_t phys_addr,
429 unsigned int flags,
430 unsigned int isu_size,
431 unsigned int irq_count,
432 const char *name);
433
434 /* Assign ISUs, to call before mpic_init()
435 *
436 * @mpic: controller structure as returned by mpic_alloc()
437 * @isu_num: ISU number
438 * @phys_addr: physical address of the ISU
439 */
440 extern void mpic_assign_isu(struct mpic *mpic, unsigned int isu_num,
441 phys_addr_t phys_addr);
442
443
444 /* Initialize the controller. After this has been called, none of the above
445 * should be called again for this mpic
446 */
447 extern void mpic_init(struct mpic *mpic);
448
449 /*
450 * All of the following functions must only be used after the
451 * ISUs have been assigned and the controller fully initialized
452 * with mpic_init()
453 */
454
455
456 /* Change the priority of an interrupt. Default is 8 for irqs and
457 * 10 for IPIs. You can call this on both IPIs and IRQ numbers, but the
458 * IPI number is then the offset'ed (linux irq number mapped to the IPI)
459 */
460 extern void mpic_irq_set_priority(unsigned int irq, unsigned int pri);
461
462 /* Setup a non-boot CPU */
463 extern void mpic_setup_this_cpu(void);
464
465 /* Clean up for kexec (or cpu offline or ...) */
466 extern void mpic_teardown_this_cpu(int secondary);
467
468 /* Get the current cpu priority for this cpu (0..15) */
469 extern int mpic_cpu_get_priority(void);
470
471 /* Set the current cpu priority for this cpu */
472 extern void mpic_cpu_set_priority(int prio);
473
474 /* Request IPIs on primary mpic */
475 void __init mpic_request_ipis(void);
476
477 /* Send a message (IPI) to a given target (cpu number or MSG_*) */
478 void smp_mpic_message_pass(int target, int msg);
479
480 /* Unmask a specific virq */
481 extern void mpic_unmask_irq(struct irq_data *d);
482 /* Mask a specific virq */
483 extern void mpic_mask_irq(struct irq_data *d);
484 /* EOI a specific virq */
485 extern void mpic_end_irq(struct irq_data *d);
486
487 /* Fetch interrupt from a given mpic */
488 extern unsigned int mpic_get_one_irq(struct mpic *mpic);
489 /* This one gets from the primary mpic */
490 extern unsigned int mpic_get_irq(void);
491 /* This one gets from the primary mpic via CoreInt*/
492 extern unsigned int mpic_get_coreint_irq(void);
493 /* Fetch Machine Check interrupt from primary mpic */
494 extern unsigned int mpic_get_mcirq(void);
495
496 #endif /* __KERNEL__ */
497 #endif /* _ASM_POWERPC_MPIC_H */
498