summaryrefslogtreecommitdiff
path: root/include/asm-powerpc/mpic.h
blob: e4d5fc5362a02e3389fc75f3d5fd9710fc0488ea (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
#ifndef _ASM_POWERPC_MPIC_H
#define _ASM_POWERPC_MPIC_H
#ifdef __KERNEL__

#include <linux/irq.h>
#include <asm/dcr.h>

/*
 * Global registers
 */

#define MPIC_GREG_BASE			0x01000

#define MPIC_GREG_FEATURE_0		0x00000
#define		MPIC_GREG_FEATURE_LAST_SRC_MASK		0x07ff0000
#define		MPIC_GREG_FEATURE_LAST_SRC_SHIFT	16
#define		MPIC_GREG_FEATURE_LAST_CPU_MASK		0x00001f00
#define		MPIC_GREG_FEATURE_LAST_CPU_SHIFT	8
#define		MPIC_GREG_FEATURE_VERSION_MASK		0xff
#define MPIC_GREG_FEATURE_1		0x00010
#define MPIC_GREG_GLOBAL_CONF_0		0x00020
#define		MPIC_GREG_GCONF_RESET			0x80000000
#define		MPIC_GREG_GCONF_8259_PTHROU_DIS		0x20000000
#define		MPIC_GREG_GCONF_BASE_MASK		0x000fffff
#define MPIC_GREG_GLOBAL_CONF_1		0x00030
#define		MPIC_GREG_GLOBAL_CONF_1_SIE		0x08000000
#define		MPIC_GREG_GLOBAL_CONF_1_CLK_RATIO_MASK	0x70000000
#define		MPIC_GREG_GLOBAL_CONF_1_CLK_RATIO(r)	\
			(((r) << 28) & MPIC_GREG_GLOBAL_CONF_1_CLK_RATIO_MASK)
#define MPIC_GREG_VENDOR_0		0x00040
#define MPIC_GREG_VENDOR_1		0x00050
#define MPIC_GREG_VENDOR_2		0x00060
#define MPIC_GREG_VENDOR_3		0x00070
#define MPIC_GREG_VENDOR_ID		0x00080
#define 	MPIC_GREG_VENDOR_ID_STEPPING_MASK	0x00ff0000
#define 	MPIC_GREG_VENDOR_ID_STEPPING_SHIFT	16
#define 	MPIC_GREG_VENDOR_ID_DEVICE_ID_MASK	0x0000ff00
#define 	MPIC_GREG_VENDOR_ID_DEVICE_ID_SHIFT	8
#define 	MPIC_GREG_VENDOR_ID_VENDOR_ID_MASK	0x000000ff
#define MPIC_GREG_PROCESSOR_INIT	0x00090
#define MPIC_GREG_IPI_VECTOR_PRI_0	0x000a0
#define MPIC_GREG_IPI_VECTOR_PRI_1	0x000b0
#define MPIC_GREG_IPI_VECTOR_PRI_2	0x000c0
#define MPIC_GREG_IPI_VECTOR_PRI_3	0x000d0
#define MPIC_GREG_IPI_STRIDE		0x10
#define MPIC_GREG_SPURIOUS		0x000e0
#define MPIC_GREG_TIMER_FREQ		0x000f0

/*
 *
 * Timer registers
 */
#define MPIC_TIMER_BASE			0x01100
#define MPIC_TIMER_STRIDE		0x40

#define MPIC_TIMER_CURRENT_CNT		0x00000
#define MPIC_TIMER_BASE_CNT		0x00010
#define MPIC_TIMER_VECTOR_PRI		0x00020
#define MPIC_TIMER_DESTINATION		0x00030

/*
 * Per-Processor registers
 */

#define MPIC_CPU_THISBASE		0x00000
#define MPIC_CPU_BASE			0x20000
#define MPIC_CPU_STRIDE			0x01000

#define MPIC_CPU_IPI_DISPATCH_0		0x00040
#define MPIC_CPU_IPI_DISPATCH_1		0x00050
#define MPIC_CPU_IPI_DISPATCH_2		0x00060
#define MPIC_CPU_IPI_DISPATCH_3		0x00070
#define MPIC_CPU_IPI_DISPATCH_STRIDE	0x00010
#define MPIC_CPU_CURRENT_TASK_PRI	0x00080
#define 	MPIC_CPU_TASKPRI_MASK			0x0000000f
#define MPIC_CPU_WHOAMI			0x00090
#define 	MPIC_CPU_WHOAMI_MASK			0x0000001f
#define MPIC_CPU_INTACK			0x000a0
#define MPIC_CPU_EOI			0x000b0

/*
 * Per-source registers
 */

#define MPIC_IRQ_BASE			0x10000
#define MPIC_IRQ_STRIDE			0x00020
#define MPIC_IRQ_VECTOR_PRI		0x00000
#define 	MPIC_VECPRI_MASK			0x80000000
#define 	MPIC_VECPRI_ACTIVITY			0x40000000	/* Read Only */
#define 	MPIC_VECPRI_PRIORITY_MASK		0x000f0000
#define 	MPIC_VECPRI_PRIORITY_SHIFT		16
#define 	MPIC_VECPRI_VECTOR_MASK			0x000007ff
#define 	MPIC_VECPRI_POLARITY_POSITIVE		0x00800000
#define 	MPIC_VECPRI_POLARITY_NEGATIVE		0x00000000
#define 	MPIC_VECPRI_POLARITY_MASK		0x00800000
#define 	MPIC_VECPRI_SENSE_LEVEL			0x00400000
#define 	MPIC_VECPRI_SENSE_EDGE			0x00000000
#define 	MPIC_VECPRI_SENSE_MASK			0x00400000
#define MPIC_IRQ_DESTINATION		0x00010

#define MPIC_MAX_IRQ_SOURCES	2048
#define MPIC_MAX_CPUS		32
#define MPIC_MAX_ISU		32

/*
 * Tsi108 implementation of MPIC has many differences from the original one
 */

/*
 * Global registers
 */

#define TSI108_GREG_BASE		0x00000
#define TSI108_GREG_FEATURE_0		0x00000
#define TSI108_GREG_GLOBAL_CONF_0	0x00004
#define TSI108_GREG_VENDOR_ID		0x0000c
#define TSI108_GREG_IPI_VECTOR_PRI_0	0x00204		/* Doorbell 0 */
#define TSI108_GREG_IPI_STRIDE		0x0c
#define TSI108_GREG_SPURIOUS		0x00010
#define TSI108_GREG_TIMER_FREQ		0x00014

/*
 * Timer registers
 */
#define TSI108_TIMER_BASE		0x0030
#define TSI108_TIMER_STRIDE		0x10
#define TSI108_TIMER_CURRENT_CNT	0x00000
#define TSI108_TIMER_BASE_CNT		0x00004
#define TSI108_TIMER_VECTOR_PRI		0x00008
#define TSI108_TIMER_DESTINATION	0x0000c

/*
 * Per-Processor registers
 */
#define TSI108_CPU_BASE			0x00300
#define TSI108_CPU_STRIDE		0x00040
#define TSI108_CPU_IPI_DISPATCH_0	0x00200
#define TSI108_CPU_IPI_DISPATCH_STRIDE	0x00000
#define TSI108_CPU_CURRENT_TASK_PRI	0x00000
#define TSI108_CPU_WHOAMI		0xffffffff
#define TSI108_CPU_INTACK		0x00004
#define TSI108_CPU_EOI			0x00008

/*
 * Per-source registers
 */
#define TSI108_IRQ_BASE			0x00100
#define TSI108_IRQ_STRIDE		0x00008
#define TSI108_IRQ_VECTOR_PRI		0x00000
#define TSI108_VECPRI_VECTOR_MASK	0x000000ff
#define TSI108_VECPRI_POLARITY_POSITIVE	0x01000000
#define TSI108_VECPRI_POLARITY_NEGATIVE	0x00000000
#define TSI108_VECPRI_SENSE_LEVEL	0x02000000
#define TSI108_VECPRI_SENSE_EDGE	0x00000000
#define TSI108_VECPRI_POLARITY_MASK	0x01000000
#define TSI108_VECPRI_SENSE_MASK	0x02000000
#define TSI108_IRQ_DESTINATION		0x00004

/* weird mpic register indices and mask bits in the HW info array */
enum {
	MPIC_IDX_GREG_BASE = 0,
	MPIC_IDX_GREG_FEATURE_0,
	MPIC_IDX_GREG_GLOBAL_CONF_0,
	MPIC_IDX_GREG_VENDOR_ID,
	MPIC_IDX_GREG_IPI_VECTOR_PRI_0,
	MPIC_IDX_GREG_IPI_STRIDE,
	MPIC_IDX_GREG_SPURIOUS,
	MPIC_IDX_GREG_TIMER_FREQ,

	MPIC_IDX_TIMER_BASE,
	MPIC_IDX_TIMER_STRIDE,
	MPIC_IDX_TIMER_CURRENT_CNT,
	MPIC_IDX_TIMER_BASE_CNT,
	MPIC_IDX_TIMER_VECTOR_PRI,
	MPIC_IDX_TIMER_DESTINATION,

	MPIC_IDX_CPU_BASE,
	MPIC_IDX_CPU_STRIDE,
	MPIC_IDX_CPU_IPI_DISPATCH_0,
	MPIC_IDX_CPU_IPI_DISPATCH_STRIDE,
	MPIC_IDX_CPU_CURRENT_TASK_PRI,
	MPIC_IDX_CPU_WHOAMI,
	MPIC_IDX_CPU_INTACK,
	MPIC_IDX_CPU_EOI,

	MPIC_IDX_IRQ_BASE,
	MPIC_IDX_IRQ_STRIDE,
	MPIC_IDX_IRQ_VECTOR_PRI,

	MPIC_IDX_VECPRI_VECTOR_MASK,
	MPIC_IDX_VECPRI_POLARITY_POSITIVE,
	MPIC_IDX_VECPRI_POLARITY_NEGATIVE,
	MPIC_IDX_VECPRI_SENSE_LEVEL,
	MPIC_IDX_VECPRI_SENSE_EDGE,
	MPIC_IDX_VECPRI_POLARITY_MASK,
	MPIC_IDX_VECPRI_SENSE_MASK,
	MPIC_IDX_IRQ_DESTINATION,
	MPIC_IDX_END
};


#ifdef CONFIG_MPIC_U3_HT_IRQS
/* Fixup table entry */
struct mpic_irq_fixup
{
	u8 __iomem	*base;
	u8 __iomem	*applebase;
	u32		data;
	unsigned int	index;
};
#endif /* CONFIG_MPIC_U3_HT_IRQS */


enum mpic_reg_type {
	mpic_access_mmio_le,
	mpic_access_mmio_be,
#ifdef CONFIG_PPC_DCR
	mpic_access_dcr
#endif
};

struct mpic_reg_bank {
	u32 __iomem	*base;
#ifdef CONFIG_PPC_DCR
	dcr_host_t	dhost;
	unsigned int	dbase;
	unsigned int	doff;
#endif /* CONFIG_PPC_DCR */
};

/* The instance data of a given MPIC */
struct mpic
{
	/* The device node of the interrupt controller */
	struct device_node	*of_node;

	/* The remapper for this MPIC */
	struct irq_host		*irqhost;

	/* The "linux" controller struct */
	struct irq_chip		hc_irq;
#ifdef CONFIG_MPIC_U3_HT_IRQS
	struct irq_chip		hc_ht_irq;
#endif
#ifdef CONFIG_SMP
	struct irq_chip		hc_ipi;
#endif
	const char		*name;
	/* Flags */
	unsigned int		flags;
	/* How many irq sources in a given ISU */
	unsigned int		isu_size;
	unsigned int		isu_shift;
	unsigned int		isu_mask;
	unsigned int		irq_count;
	/* Number of sources */
	unsigned int		num_sources;
	/* Number of CPUs */
	unsigned int		num_cpus;
	/* default senses array */
	unsigned char		*senses;
	unsigned int		senses_count;

	/* vector numbers used for internal sources (ipi/timers) */
	unsigned int		ipi_vecs[4];
	unsigned int		timer_vecs[4];

	/* Spurious vector to program into unused sources */
	unsigned int		spurious_vec;

#ifdef CONFIG_MPIC_U3_HT_IRQS
	/* The fixup table */
	struct mpic_irq_fixup	*fixups;
	spinlock_t		fixup_lock;
#endif

	/* Register access method */
	enum mpic_reg_type	reg_type;

	/* The various ioremap'ed bases */
	struct mpic_reg_bank	gregs;
	struct mpic_reg_bank	tmregs;
	struct mpic_reg_bank	cpuregs[MPIC_MAX_CPUS];
	struct mpic_reg_bank	isus[MPIC_MAX_ISU];

#ifdef CONFIG_PPC_DCR
	unsigned int		dcr_base;
#endif

#ifdef CONFIG_MPIC_WEIRD
	/* Pointer to HW info array */
	u32			*hw_set;
#endif

	/* link */
	struct mpic		*next;
};

/*
 * MPIC flags (passed to mpic_alloc)
 *
 * The top 4 bits contain an MPIC bhw id that is used to index the
 * register offsets and some masks when CONFIG_MPIC_WEIRD is set.
 * Note setting any ID (leaving those bits to 0) means standard MPIC
 */

/* This is the primary controller, only that one has IPIs and
 * has afinity control. A non-primary MPIC always uses CPU0
 * registers only
 */
#define MPIC_PRIMARY			0x00000001

/* Set this for a big-endian MPIC */
#define MPIC_BIG_ENDIAN			0x00000002
/* Broken U3 MPIC */
#define MPIC_U3_HT_IRQS			0x00000004
/* Broken IPI registers (autodetected) */
#define MPIC_BROKEN_IPI			0x00000008
/* MPIC wants a reset */
#define MPIC_WANTS_RESET		0x00000010
/* Spurious vector requires EOI */
#define MPIC_SPV_EOI			0x00000020
/* No passthrough disable */
#define MPIC_NO_PTHROU_DIS		0x00000040
/* DCR based MPIC */
#define MPIC_USES_DCR			0x00000080
/* MPIC has 11-bit vector fields (or larger) */
#define MPIC_LARGE_VECTORS		0x00000100

/* MPIC HW modification ID */
#define MPIC_REGSET_MASK		0xf0000000
#define MPIC_REGSET(val)		(((val) & 0xf ) << 28)
#define MPIC_GET_REGSET(flags)		(((flags) >> 28) & 0xf)

#define	MPIC_REGSET_STANDARD		MPIC_REGSET(0)	/* Original MPIC */
#define	MPIC_REGSET_TSI108		MPIC_REGSET(1)	/* Tsi108/109 PIC */

/* Allocate the controller structure and setup the linux irq descs
 * for the range if interrupts passed in. No HW initialization is
 * actually performed.
 * 
 * @phys_addr:	physial base address of the MPIC
 * @flags:	flags, see constants above
 * @isu_size:	number of interrupts in an ISU. Use 0 to use a
 *              standard ISU-less setup (aka powermac)
 * @irq_offset: first irq number to assign to this mpic
 * @irq_count:  number of irqs to use with this mpic IRQ sources. Pass 0
 *	        to match the number of sources
 * @ipi_offset: first irq number to assign to this mpic IPI sources,
 *		used only on primary mpic
 * @senses:	array of sense values
 * @senses_num: number of entries in the array
 *
 * Note about the sense array. If none is passed, all interrupts are
 * setup to be level negative unless MPIC_U3_HT_IRQS is set in which
 * case they are edge positive (and the array is ignored anyway).
 * The values in the array start at the first source of the MPIC,
 * that is senses[0] correspond to linux irq "irq_offset".
 */
extern struct mpic *mpic_alloc(struct device_node *node,
			       phys_addr_t phys_addr,
			       unsigned int flags,
			       unsigned int isu_size,
			       unsigned int irq_count,
			       const char *name);

/* Assign ISUs, to call before mpic_init()
 *
 * @mpic:	controller structure as returned by mpic_alloc()
 * @isu_num:	ISU number
 * @phys_addr:	physical address of the ISU
 */
extern void mpic_assign_isu(struct mpic *mpic, unsigned int isu_num,
			    phys_addr_t phys_addr);

/* Set default sense codes
 *
 * @mpic:	controller
 * @senses:	array of sense codes
 * @count:	size of above array
 *
 * Optionally provide an array (indexed on hardware interrupt numbers
 * for this MPIC) of default sense codes for the chip. Those are linux
 * sense codes IRQ_TYPE_*
 *
 * The driver gets ownership of the pointer, don't dispose of it or
 * anything like that. __init only.
 */
extern void mpic_set_default_senses(struct mpic *mpic, u8 *senses, int count);


/* Initialize the controller. After this has been called, none of the above
 * should be called again for this mpic
 */
extern void mpic_init(struct mpic *mpic);

/*
 * All of the following functions must only be used after the
 * ISUs have been assigned and the controller fully initialized
 * with mpic_init()
 */


/* Change/Read the priority of an interrupt. Default is 8 for irqs and
 * 10 for IPIs. You can call this on both IPIs and IRQ numbers, but the
 * IPI number is then the offset'ed (linux irq number mapped to the IPI)
 */
extern void mpic_irq_set_priority(unsigned int irq, unsigned int pri);
extern unsigned int mpic_irq_get_priority(unsigned int irq);

/* Setup a non-boot CPU */
extern void mpic_setup_this_cpu(void);

/* Clean up for kexec (or cpu offline or ...) */
extern void mpic_teardown_this_cpu(int secondary);

/* Get the current cpu priority for this cpu (0..15) */
extern int mpic_cpu_get_priority(void);

/* Set the current cpu priority for this cpu */
extern void mpic_cpu_set_priority(int prio);

/* Request IPIs on primary mpic */
extern void mpic_request_ipis(void);

/* Send an IPI (non offseted number 0..3) */
extern void mpic_send_ipi(unsigned int ipi_no, unsigned int cpu_mask);

/* Send a message (IPI) to a given target (cpu number or MSG_*) */
void smp_mpic_message_pass(int target, int msg);

/* Fetch interrupt from a given mpic */
extern unsigned int mpic_get_one_irq(struct mpic *mpic);
/* This one gets to the primary mpic */
extern unsigned int mpic_get_irq(void);

/* Set the EPIC clock ratio */
void mpic_set_clk_ratio(struct mpic *mpic, u32 clock_ratio);

/* Enable/Disable EPIC serial interrupt mode */
void mpic_set_serial_int(struct mpic *mpic, int enable);

#endif /* __KERNEL__ */
#endif	/* _ASM_POWERPC_MPIC_H */