1 #ifndef _ASM_POWERPC_MPIC_H 2 #define _ASM_POWERPC_MPIC_H 3 #ifdef __KERNEL__ 4 5 #include <linux/irq.h> 6 #include <asm/dcr.h> 7 #include <asm/msi_bitmap.h> 8 9 /* 10 * Global registers 11 */ 12 13 #define MPIC_GREG_BASE 0x01000 14 15 #define MPIC_GREG_FEATURE_0 0x00000 16 #define MPIC_GREG_FEATURE_LAST_SRC_MASK 0x07ff0000 17 #define MPIC_GREG_FEATURE_LAST_SRC_SHIFT 16 18 #define MPIC_GREG_FEATURE_LAST_CPU_MASK 0x00001f00 19 #define MPIC_GREG_FEATURE_LAST_CPU_SHIFT 8 20 #define MPIC_GREG_FEATURE_VERSION_MASK 0xff 21 #define MPIC_GREG_FEATURE_1 0x00010 22 #define MPIC_GREG_GLOBAL_CONF_0 0x00020 23 #define MPIC_GREG_GCONF_RESET 0x80000000 24 /* On the FSL mpic implementations the Mode field is expand to be 25 * 2 bits wide: 26 * 0b00 = pass through (interrupts routed to IRQ0) 27 * 0b01 = Mixed mode 28 * 0b10 = reserved 29 * 0b11 = External proxy / coreint 30 */ 31 #define MPIC_GREG_GCONF_COREINT 0x60000000 32 #define MPIC_GREG_GCONF_8259_PTHROU_DIS 0x20000000 33 #define MPIC_GREG_GCONF_NO_BIAS 0x10000000 34 #define MPIC_GREG_GCONF_BASE_MASK 0x000fffff 35 #define MPIC_GREG_GCONF_MCK 0x08000000 36 #define MPIC_GREG_GLOBAL_CONF_1 0x00030 37 #define MPIC_GREG_GLOBAL_CONF_1_SIE 0x08000000 38 #define MPIC_GREG_GLOBAL_CONF_1_CLK_RATIO_MASK 0x70000000 39 #define MPIC_GREG_GLOBAL_CONF_1_CLK_RATIO(r) \ 40 (((r) << 28) & MPIC_GREG_GLOBAL_CONF_1_CLK_RATIO_MASK) 41 #define MPIC_GREG_VENDOR_0 0x00040 42 #define MPIC_GREG_VENDOR_1 0x00050 43 #define MPIC_GREG_VENDOR_2 0x00060 44 #define MPIC_GREG_VENDOR_3 0x00070 45 #define MPIC_GREG_VENDOR_ID 0x00080 46 #define MPIC_GREG_VENDOR_ID_STEPPING_MASK 0x00ff0000 47 #define MPIC_GREG_VENDOR_ID_STEPPING_SHIFT 16 48 #define MPIC_GREG_VENDOR_ID_DEVICE_ID_MASK 0x0000ff00 49 #define MPIC_GREG_VENDOR_ID_DEVICE_ID_SHIFT 8 50 #define MPIC_GREG_VENDOR_ID_VENDOR_ID_MASK 0x000000ff 51 #define MPIC_GREG_PROCESSOR_INIT 0x00090 52 #define MPIC_GREG_IPI_VECTOR_PRI_0 0x000a0 53 #define MPIC_GREG_IPI_VECTOR_PRI_1 0x000b0 54 #define MPIC_GREG_IPI_VECTOR_PRI_2 0x000c0 55 #define MPIC_GREG_IPI_VECTOR_PRI_3 0x000d0 56 #define MPIC_GREG_IPI_STRIDE 0x10 57 #define MPIC_GREG_SPURIOUS 0x000e0 58 #define MPIC_GREG_TIMER_FREQ 0x000f0 59 60 /* 61 * 62 * Timer registers 63 */ 64 #define MPIC_TIMER_BASE 0x01100 65 #define MPIC_TIMER_STRIDE 0x40 66 67 #define MPIC_TIMER_CURRENT_CNT 0x00000 68 #define MPIC_TIMER_BASE_CNT 0x00010 69 #define MPIC_TIMER_VECTOR_PRI 0x00020 70 #define MPIC_TIMER_DESTINATION 0x00030 71 72 /* 73 * Per-Processor registers 74 */ 75 76 #define MPIC_CPU_THISBASE 0x00000 77 #define MPIC_CPU_BASE 0x20000 78 #define MPIC_CPU_STRIDE 0x01000 79 80 #define MPIC_CPU_IPI_DISPATCH_0 0x00040 81 #define MPIC_CPU_IPI_DISPATCH_1 0x00050 82 #define MPIC_CPU_IPI_DISPATCH_2 0x00060 83 #define MPIC_CPU_IPI_DISPATCH_3 0x00070 84 #define MPIC_CPU_IPI_DISPATCH_STRIDE 0x00010 85 #define MPIC_CPU_CURRENT_TASK_PRI 0x00080 86 #define MPIC_CPU_TASKPRI_MASK 0x0000000f 87 #define MPIC_CPU_WHOAMI 0x00090 88 #define MPIC_CPU_WHOAMI_MASK 0x0000001f 89 #define MPIC_CPU_INTACK 0x000a0 90 #define MPIC_CPU_EOI 0x000b0 91 #define MPIC_CPU_MCACK 0x000c0 92 93 /* 94 * Per-source registers 95 */ 96 97 #define MPIC_IRQ_BASE 0x10000 98 #define MPIC_IRQ_STRIDE 0x00020 99 #define MPIC_IRQ_VECTOR_PRI 0x00000 100 #define MPIC_VECPRI_MASK 0x80000000 101 #define MPIC_VECPRI_ACTIVITY 0x40000000 /* Read Only */ 102 #define MPIC_VECPRI_PRIORITY_MASK 0x000f0000 103 #define MPIC_VECPRI_PRIORITY_SHIFT 16 104 #define MPIC_VECPRI_VECTOR_MASK 0x000007ff 105 #define MPIC_VECPRI_POLARITY_POSITIVE 0x00800000 106 #define MPIC_VECPRI_POLARITY_NEGATIVE 0x00000000 107 #define MPIC_VECPRI_POLARITY_MASK 0x00800000 108 #define MPIC_VECPRI_SENSE_LEVEL 0x00400000 109 #define MPIC_VECPRI_SENSE_EDGE 0x00000000 110 #define MPIC_VECPRI_SENSE_MASK 0x00400000 111 #define MPIC_IRQ_DESTINATION 0x00010 112 113 #define MPIC_MAX_IRQ_SOURCES 2048 114 #define MPIC_MAX_CPUS 32 115 #define MPIC_MAX_ISU 32 116 117 /* 118 * Tsi108 implementation of MPIC has many differences from the original one 119 */ 120 121 /* 122 * Global registers 123 */ 124 125 #define TSI108_GREG_BASE 0x00000 126 #define TSI108_GREG_FEATURE_0 0x00000 127 #define TSI108_GREG_GLOBAL_CONF_0 0x00004 128 #define TSI108_GREG_VENDOR_ID 0x0000c 129 #define TSI108_GREG_IPI_VECTOR_PRI_0 0x00204 /* Doorbell 0 */ 130 #define TSI108_GREG_IPI_STRIDE 0x0c 131 #define TSI108_GREG_SPURIOUS 0x00010 132 #define TSI108_GREG_TIMER_FREQ 0x00014 133 134 /* 135 * Timer registers 136 */ 137 #define TSI108_TIMER_BASE 0x0030 138 #define TSI108_TIMER_STRIDE 0x10 139 #define TSI108_TIMER_CURRENT_CNT 0x00000 140 #define TSI108_TIMER_BASE_CNT 0x00004 141 #define TSI108_TIMER_VECTOR_PRI 0x00008 142 #define TSI108_TIMER_DESTINATION 0x0000c 143 144 /* 145 * Per-Processor registers 146 */ 147 #define TSI108_CPU_BASE 0x00300 148 #define TSI108_CPU_STRIDE 0x00040 149 #define TSI108_CPU_IPI_DISPATCH_0 0x00200 150 #define TSI108_CPU_IPI_DISPATCH_STRIDE 0x00000 151 #define TSI108_CPU_CURRENT_TASK_PRI 0x00000 152 #define TSI108_CPU_WHOAMI 0xffffffff 153 #define TSI108_CPU_INTACK 0x00004 154 #define TSI108_CPU_EOI 0x00008 155 #define TSI108_CPU_MCACK 0x00004 /* Doesn't really exist here */ 156 157 /* 158 * Per-source registers 159 */ 160 #define TSI108_IRQ_BASE 0x00100 161 #define TSI108_IRQ_STRIDE 0x00008 162 #define TSI108_IRQ_VECTOR_PRI 0x00000 163 #define TSI108_VECPRI_VECTOR_MASK 0x000000ff 164 #define TSI108_VECPRI_POLARITY_POSITIVE 0x01000000 165 #define TSI108_VECPRI_POLARITY_NEGATIVE 0x00000000 166 #define TSI108_VECPRI_SENSE_LEVEL 0x02000000 167 #define TSI108_VECPRI_SENSE_EDGE 0x00000000 168 #define TSI108_VECPRI_POLARITY_MASK 0x01000000 169 #define TSI108_VECPRI_SENSE_MASK 0x02000000 170 #define TSI108_IRQ_DESTINATION 0x00004 171 172 /* weird mpic register indices and mask bits in the HW info array */ 173 enum { 174 MPIC_IDX_GREG_BASE = 0, 175 MPIC_IDX_GREG_FEATURE_0, 176 MPIC_IDX_GREG_GLOBAL_CONF_0, 177 MPIC_IDX_GREG_VENDOR_ID, 178 MPIC_IDX_GREG_IPI_VECTOR_PRI_0, 179 MPIC_IDX_GREG_IPI_STRIDE, 180 MPIC_IDX_GREG_SPURIOUS, 181 MPIC_IDX_GREG_TIMER_FREQ, 182 183 MPIC_IDX_TIMER_BASE, 184 MPIC_IDX_TIMER_STRIDE, 185 MPIC_IDX_TIMER_CURRENT_CNT, 186 MPIC_IDX_TIMER_BASE_CNT, 187 MPIC_IDX_TIMER_VECTOR_PRI, 188 MPIC_IDX_TIMER_DESTINATION, 189 190 MPIC_IDX_CPU_BASE, 191 MPIC_IDX_CPU_STRIDE, 192 MPIC_IDX_CPU_IPI_DISPATCH_0, 193 MPIC_IDX_CPU_IPI_DISPATCH_STRIDE, 194 MPIC_IDX_CPU_CURRENT_TASK_PRI, 195 MPIC_IDX_CPU_WHOAMI, 196 MPIC_IDX_CPU_INTACK, 197 MPIC_IDX_CPU_EOI, 198 MPIC_IDX_CPU_MCACK, 199 200 MPIC_IDX_IRQ_BASE, 201 MPIC_IDX_IRQ_STRIDE, 202 MPIC_IDX_IRQ_VECTOR_PRI, 203 204 MPIC_IDX_VECPRI_VECTOR_MASK, 205 MPIC_IDX_VECPRI_POLARITY_POSITIVE, 206 MPIC_IDX_VECPRI_POLARITY_NEGATIVE, 207 MPIC_IDX_VECPRI_SENSE_LEVEL, 208 MPIC_IDX_VECPRI_SENSE_EDGE, 209 MPIC_IDX_VECPRI_POLARITY_MASK, 210 MPIC_IDX_VECPRI_SENSE_MASK, 211 MPIC_IDX_IRQ_DESTINATION, 212 MPIC_IDX_END 213 }; 214 215 216 #ifdef CONFIG_MPIC_U3_HT_IRQS 217 /* Fixup table entry */ 218 struct mpic_irq_fixup 219 { 220 u8 __iomem *base; 221 u8 __iomem *applebase; 222 u32 data; 223 unsigned int index; 224 }; 225 #endif /* CONFIG_MPIC_U3_HT_IRQS */ 226 227 228 enum mpic_reg_type { 229 mpic_access_mmio_le, 230 mpic_access_mmio_be, 231 #ifdef CONFIG_PPC_DCR 232 mpic_access_dcr 233 #endif 234 }; 235 236 struct mpic_reg_bank { 237 u32 __iomem *base; 238 #ifdef CONFIG_PPC_DCR 239 dcr_host_t dhost; 240 #endif /* CONFIG_PPC_DCR */ 241 }; 242 243 struct mpic_irq_save { 244 u32 vecprio, 245 dest; 246 #ifdef CONFIG_MPIC_U3_HT_IRQS 247 u32 fixup_data; 248 #endif 249 }; 250 251 /* The instance data of a given MPIC */ 252 struct mpic 253 { 254 /* The OpenFirmware dt node for this MPIC */ 255 struct device_node *node; 256 257 /* The remapper for this MPIC */ 258 struct irq_domain *irqhost; 259 260 /* The "linux" controller struct */ 261 struct irq_chip hc_irq; 262 #ifdef CONFIG_MPIC_U3_HT_IRQS 263 struct irq_chip hc_ht_irq; 264 #endif 265 #ifdef CONFIG_SMP 266 struct irq_chip hc_ipi; 267 #endif 268 struct irq_chip hc_tm; 269 const char *name; 270 /* Flags */ 271 unsigned int flags; 272 /* How many irq sources in a given ISU */ 273 unsigned int isu_size; 274 unsigned int isu_shift; 275 unsigned int isu_mask; 276 /* Number of sources */ 277 unsigned int num_sources; 278 /* default senses array */ 279 unsigned char *senses; 280 unsigned int senses_count; 281 282 /* vector numbers used for internal sources (ipi/timers) */ 283 unsigned int ipi_vecs[4]; 284 unsigned int timer_vecs[8]; 285 286 /* Spurious vector to program into unused sources */ 287 unsigned int spurious_vec; 288 289 #ifdef CONFIG_MPIC_U3_HT_IRQS 290 /* The fixup table */ 291 struct mpic_irq_fixup *fixups; 292 raw_spinlock_t fixup_lock; 293 #endif 294 295 /* Register access method */ 296 enum mpic_reg_type reg_type; 297 298 /* The physical base address of the MPIC */ 299 phys_addr_t paddr; 300 301 /* The various ioremap'ed bases */ 302 struct mpic_reg_bank gregs; 303 struct mpic_reg_bank tmregs; 304 struct mpic_reg_bank cpuregs[MPIC_MAX_CPUS]; 305 struct mpic_reg_bank isus[MPIC_MAX_ISU]; 306 307 /* Protected sources */ 308 unsigned long *protected; 309 310 #ifdef CONFIG_MPIC_WEIRD 311 /* Pointer to HW info array */ 312 u32 *hw_set; 313 #endif 314 315 #ifdef CONFIG_PCI_MSI 316 struct msi_bitmap msi_bitmap; 317 #endif 318 319 #ifdef CONFIG_MPIC_BROKEN_REGREAD 320 u32 isu_reg0_shadow[MPIC_MAX_IRQ_SOURCES]; 321 #endif 322 323 /* link */ 324 struct mpic *next; 325 326 #ifdef CONFIG_PM 327 struct mpic_irq_save *save_data; 328 #endif 329 }; 330 331 /* 332 * MPIC flags (passed to mpic_alloc) 333 * 334 * The top 4 bits contain an MPIC bhw id that is used to index the 335 * register offsets and some masks when CONFIG_MPIC_WEIRD is set. 336 * Note setting any ID (leaving those bits to 0) means standard MPIC 337 */ 338 339 /* 340 * This is a secondary ("chained") controller; it only uses the CPU0 341 * registers. Primary controllers have IPIs and affinity control. 342 */ 343 #define MPIC_SECONDARY 0x00000001 344 345 /* Set this for a big-endian MPIC */ 346 #define MPIC_BIG_ENDIAN 0x00000002 347 /* Broken U3 MPIC */ 348 #define MPIC_U3_HT_IRQS 0x00000004 349 /* Broken IPI registers (autodetected) */ 350 #define MPIC_BROKEN_IPI 0x00000008 351 /* Spurious vector requires EOI */ 352 #define MPIC_SPV_EOI 0x00000020 353 /* No passthrough disable */ 354 #define MPIC_NO_PTHROU_DIS 0x00000040 355 /* DCR based MPIC */ 356 #define MPIC_USES_DCR 0x00000080 357 /* MPIC has 11-bit vector fields (or larger) */ 358 #define MPIC_LARGE_VECTORS 0x00000100 359 /* Enable delivery of prio 15 interrupts as MCK instead of EE */ 360 #define MPIC_ENABLE_MCK 0x00000200 361 /* Disable bias among target selection, spread interrupts evenly */ 362 #define MPIC_NO_BIAS 0x00000400 363 /* Destination only supports a single CPU at a time */ 364 #define MPIC_SINGLE_DEST_CPU 0x00001000 365 /* Enable CoreInt delivery of interrupts */ 366 #define MPIC_ENABLE_COREINT 0x00002000 367 /* Do not reset the MPIC during initialization */ 368 #define MPIC_NO_RESET 0x00004000 369 /* Freescale MPIC (compatible includes "fsl,mpic") */ 370 #define MPIC_FSL 0x00008000 371 372 /* MPIC HW modification ID */ 373 #define MPIC_REGSET_MASK 0xf0000000 374 #define MPIC_REGSET(val) (((val) & 0xf ) << 28) 375 #define MPIC_GET_REGSET(flags) (((flags) >> 28) & 0xf) 376 377 #define MPIC_REGSET_STANDARD MPIC_REGSET(0) /* Original MPIC */ 378 #define MPIC_REGSET_TSI108 MPIC_REGSET(1) /* Tsi108/109 PIC */ 379 380 /* Allocate the controller structure and setup the linux irq descs 381 * for the range if interrupts passed in. No HW initialization is 382 * actually performed. 383 * 384 * @phys_addr: physial base address of the MPIC 385 * @flags: flags, see constants above 386 * @isu_size: number of interrupts in an ISU. Use 0 to use a 387 * standard ISU-less setup (aka powermac) 388 * @irq_offset: first irq number to assign to this mpic 389 * @irq_count: number of irqs to use with this mpic IRQ sources. Pass 0 390 * to match the number of sources 391 * @ipi_offset: first irq number to assign to this mpic IPI sources, 392 * used only on primary mpic 393 * @senses: array of sense values 394 * @senses_num: number of entries in the array 395 * 396 * Note about the sense array. If none is passed, all interrupts are 397 * setup to be level negative unless MPIC_U3_HT_IRQS is set in which 398 * case they are edge positive (and the array is ignored anyway). 399 * The values in the array start at the first source of the MPIC, 400 * that is senses[0] correspond to linux irq "irq_offset". 401 */ 402 extern struct mpic *mpic_alloc(struct device_node *node, 403 phys_addr_t phys_addr, 404 unsigned int flags, 405 unsigned int isu_size, 406 unsigned int irq_count, 407 const char *name); 408 409 /* Assign ISUs, to call before mpic_init() 410 * 411 * @mpic: controller structure as returned by mpic_alloc() 412 * @isu_num: ISU number 413 * @phys_addr: physical address of the ISU 414 */ 415 extern void mpic_assign_isu(struct mpic *mpic, unsigned int isu_num, 416 phys_addr_t phys_addr); 417 418 /* Set default sense codes 419 * 420 * @mpic: controller 421 * @senses: array of sense codes 422 * @count: size of above array 423 * 424 * Optionally provide an array (indexed on hardware interrupt numbers 425 * for this MPIC) of default sense codes for the chip. Those are linux 426 * sense codes IRQ_TYPE_* 427 * 428 * The driver gets ownership of the pointer, don't dispose of it or 429 * anything like that. __init only. 430 */ 431 extern void mpic_set_default_senses(struct mpic *mpic, u8 *senses, int count); 432 433 434 /* Initialize the controller. After this has been called, none of the above 435 * should be called again for this mpic 436 */ 437 extern void mpic_init(struct mpic *mpic); 438 439 /* 440 * All of the following functions must only be used after the 441 * ISUs have been assigned and the controller fully initialized 442 * with mpic_init() 443 */ 444 445 446 /* Change the priority of an interrupt. Default is 8 for irqs and 447 * 10 for IPIs. You can call this on both IPIs and IRQ numbers, but the 448 * IPI number is then the offset'ed (linux irq number mapped to the IPI) 449 */ 450 extern void mpic_irq_set_priority(unsigned int irq, unsigned int pri); 451 452 /* Setup a non-boot CPU */ 453 extern void mpic_setup_this_cpu(void); 454 455 /* Clean up for kexec (or cpu offline or ...) */ 456 extern void mpic_teardown_this_cpu(int secondary); 457 458 /* Get the current cpu priority for this cpu (0..15) */ 459 extern int mpic_cpu_get_priority(void); 460 461 /* Set the current cpu priority for this cpu */ 462 extern void mpic_cpu_set_priority(int prio); 463 464 /* Request IPIs on primary mpic */ 465 extern void mpic_request_ipis(void); 466 467 /* Send a message (IPI) to a given target (cpu number or MSG_*) */ 468 void smp_mpic_message_pass(int target, int msg); 469 470 /* Unmask a specific virq */ 471 extern void mpic_unmask_irq(struct irq_data *d); 472 /* Mask a specific virq */ 473 extern void mpic_mask_irq(struct irq_data *d); 474 /* EOI a specific virq */ 475 extern void mpic_end_irq(struct irq_data *d); 476 477 /* Fetch interrupt from a given mpic */ 478 extern unsigned int mpic_get_one_irq(struct mpic *mpic); 479 /* This one gets from the primary mpic */ 480 extern unsigned int mpic_get_irq(void); 481 /* This one gets from the primary mpic via CoreInt*/ 482 extern unsigned int mpic_get_coreint_irq(void); 483 /* Fetch Machine Check interrupt from primary mpic */ 484 extern unsigned int mpic_get_mcirq(void); 485 486 /* Set the EPIC clock ratio */ 487 void mpic_set_clk_ratio(struct mpic *mpic, u32 clock_ratio); 488 489 /* Enable/Disable EPIC serial interrupt mode */ 490 void mpic_set_serial_int(struct mpic *mpic, int enable); 491 492 #endif /* __KERNEL__ */ 493 #endif /* _ASM_POWERPC_MPIC_H */ 494