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