arch/powerpc/include/asm/mpic.h

   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 #define MPIC_TIMER_GROUP_STRIDE         0x1000
  67
  68 #define MPIC_TIMER_CURRENT_CNT          0x00000
  69 #define MPIC_TIMER_BASE_CNT             0x00010
  70 #define MPIC_TIMER_VECTOR_PRI           0x00020
  71 #define MPIC_TIMER_DESTINATION          0x00030
  72
  73 /*
  74  * Per-Processor registers
  75  */
  76
  77 #define MPIC_CPU_THISBASE               0x00000
  78 #define MPIC_CPU_BASE                   0x20000
  79 #define MPIC_CPU_STRIDE                 0x01000
  80
  81 #define MPIC_CPU_IPI_DISPATCH_0         0x00040
  82 #define MPIC_CPU_IPI_DISPATCH_1         0x00050
  83 #define MPIC_CPU_IPI_DISPATCH_2         0x00060
  84 #define MPIC_CPU_IPI_DISPATCH_3         0x00070
  85 #define MPIC_CPU_IPI_DISPATCH_STRIDE    0x00010
  86 #define MPIC_CPU_CURRENT_TASK_PRI       0x00080
  87 #define         MPIC_CPU_TASKPRI_MASK                   0x0000000f
  88 #define MPIC_CPU_WHOAMI                 0x00090
  89 #define         MPIC_CPU_WHOAMI_MASK                    0x0000001f
  90 #define MPIC_CPU_INTACK                 0x000a0
  91 #define MPIC_CPU_EOI                    0x000b0
  92 #define MPIC_CPU_MCACK                  0x000c0
  93
  94 /*
  95  * Per-source registers
  96  */
  97
  98 #define MPIC_IRQ_BASE                   0x10000
  99 #define MPIC_IRQ_STRIDE                 0x00020
 100 #define MPIC_IRQ_VECTOR_PRI             0x00000
 101 #define         MPIC_VECPRI_MASK                        0x80000000
 102 #define         MPIC_VECPRI_ACTIVITY                    0x40000000      /* Read Only */
 103 #define         MPIC_VECPRI_PRIORITY_MASK               0x000f0000
 104 #define         MPIC_VECPRI_PRIORITY_SHIFT              16
 105 #define         MPIC_VECPRI_VECTOR_MASK                 0x000007ff
 106 #define         MPIC_VECPRI_POLARITY_POSITIVE           0x00800000
 107 #define         MPIC_VECPRI_POLARITY_NEGATIVE           0x00000000
 108 #define         MPIC_VECPRI_POLARITY_MASK               0x00800000
 109 #define         MPIC_VECPRI_SENSE_LEVEL                 0x00400000
 110 #define         MPIC_VECPRI_SENSE_EDGE                  0x00000000
 111 #define         MPIC_VECPRI_SENSE_MASK                  0x00400000
 112 #define MPIC_IRQ_DESTINATION            0x00010
 113
 114 #define MPIC_FSL_BRR1                   0x00000
 115 #define         MPIC_FSL_BRR1_VER                       0x0000ffff
 116
 117 #define MPIC_MAX_IRQ_SOURCES    2048
 118 #define MPIC_MAX_CPUS           32
 119 #define MPIC_MAX_ISU            32
 120
 121 #define MPIC_MAX_ERR      32
 122 #define MPIC_FSL_ERR_INT  16
 123
 124 /*
 125  * Tsi108 implementation of MPIC has many differences from the original one
 126  */
 127
 128 /*
 129  * Global registers
 130  */
 131
 132 #define TSI108_GREG_BASE                0x00000
 133 #define TSI108_GREG_FEATURE_0           0x00000
 134 #define TSI108_GREG_GLOBAL_CONF_0       0x00004
 135 #define TSI108_GREG_VENDOR_ID           0x0000c
 136 #define TSI108_GREG_IPI_VECTOR_PRI_0    0x00204         /* Doorbell 0 */
 137 #define TSI108_GREG_IPI_STRIDE          0x0c
 138 #define TSI108_GREG_SPURIOUS            0x00010
 139 #define TSI108_GREG_TIMER_FREQ          0x00014
 140
 141 /*
 142  * Timer registers
 143  */
 144 #define TSI108_TIMER_BASE               0x0030
 145 #define TSI108_TIMER_STRIDE             0x10
 146 #define TSI108_TIMER_CURRENT_CNT        0x00000
 147 #define TSI108_TIMER_BASE_CNT           0x00004
 148 #define TSI108_TIMER_VECTOR_PRI         0x00008
 149 #define TSI108_TIMER_DESTINATION        0x0000c
 150
 151 /*
 152  * Per-Processor registers
 153  */
 154 #define TSI108_CPU_BASE                 0x00300
 155 #define TSI108_CPU_STRIDE               0x00040
 156 #define TSI108_CPU_IPI_DISPATCH_0       0x00200
 157 #define TSI108_CPU_IPI_DISPATCH_STRIDE  0x00000
 158 #define TSI108_CPU_CURRENT_TASK_PRI     0x00000
 159 #define TSI108_CPU_WHOAMI               0xffffffff
 160 #define TSI108_CPU_INTACK               0x00004
 161 #define TSI108_CPU_EOI                  0x00008
 162 #define TSI108_CPU_MCACK                0x00004 /* Doesn't really exist here */
 163
 164 /*
 165  * Per-source registers
 166  */
 167 #define TSI108_IRQ_BASE                 0x00100
 168 #define TSI108_IRQ_STRIDE               0x00008
 169 #define TSI108_IRQ_VECTOR_PRI           0x00000
 170 #define TSI108_VECPRI_VECTOR_MASK       0x000000ff
 171 #define TSI108_VECPRI_POLARITY_POSITIVE 0x01000000
 172 #define TSI108_VECPRI_POLARITY_NEGATIVE 0x00000000
 173 #define TSI108_VECPRI_SENSE_LEVEL       0x02000000
 174 #define TSI108_VECPRI_SENSE_EDGE        0x00000000
 175 #define TSI108_VECPRI_POLARITY_MASK     0x01000000
 176 #define TSI108_VECPRI_SENSE_MASK        0x02000000
 177 #define TSI108_IRQ_DESTINATION          0x00004
 178
 179 /* weird mpic register indices and mask bits in the HW info array */
 180 enum {
 181         MPIC_IDX_GREG_BASE = 0,
 182         MPIC_IDX_GREG_FEATURE_0,
 183         MPIC_IDX_GREG_GLOBAL_CONF_0,
 184         MPIC_IDX_GREG_VENDOR_ID,
 185         MPIC_IDX_GREG_IPI_VECTOR_PRI_0,
 186         MPIC_IDX_GREG_IPI_STRIDE,
 187         MPIC_IDX_GREG_SPURIOUS,
 188         MPIC_IDX_GREG_TIMER_FREQ,
 189
 190         MPIC_IDX_TIMER_BASE,
 191         MPIC_IDX_TIMER_STRIDE,
 192         MPIC_IDX_TIMER_CURRENT_CNT,
 193         MPIC_IDX_TIMER_BASE_CNT,
 194         MPIC_IDX_TIMER_VECTOR_PRI,
 195         MPIC_IDX_TIMER_DESTINATION,
 196
 197         MPIC_IDX_CPU_BASE,
 198         MPIC_IDX_CPU_STRIDE,
 199         MPIC_IDX_CPU_IPI_DISPATCH_0,
 200         MPIC_IDX_CPU_IPI_DISPATCH_STRIDE,
 201         MPIC_IDX_CPU_CURRENT_TASK_PRI,
 202         MPIC_IDX_CPU_WHOAMI,
 203         MPIC_IDX_CPU_INTACK,
 204         MPIC_IDX_CPU_EOI,
 205         MPIC_IDX_CPU_MCACK,
 206
 207         MPIC_IDX_IRQ_BASE,
 208         MPIC_IDX_IRQ_STRIDE,
 209         MPIC_IDX_IRQ_VECTOR_PRI,
 210
 211         MPIC_IDX_VECPRI_VECTOR_MASK,
 212         MPIC_IDX_VECPRI_POLARITY_POSITIVE,
 213         MPIC_IDX_VECPRI_POLARITY_NEGATIVE,
 214         MPIC_IDX_VECPRI_SENSE_LEVEL,
 215         MPIC_IDX_VECPRI_SENSE_EDGE,
 216         MPIC_IDX_VECPRI_POLARITY_MASK,
 217         MPIC_IDX_VECPRI_SENSE_MASK,
 218         MPIC_IDX_IRQ_DESTINATION,
 219         MPIC_IDX_END
 220 };
 221
 222
 223 #ifdef CONFIG_MPIC_U3_HT_IRQS
 224 /* Fixup table entry */
 225 struct mpic_irq_fixup
 226 {
 227         u8 __iomem      *base;
 228         u8 __iomem      *applebase;
 229         u32             data;
 230         unsigned int    index;
 231 };
 232 #endif /* CONFIG_MPIC_U3_HT_IRQS */
 233
 234
 235 enum mpic_reg_type {
 236         mpic_access_mmio_le,
 237         mpic_access_mmio_be,
 238 #ifdef CONFIG_PPC_DCR
 239         mpic_access_dcr
 240 #endif
 241 };
 242
 243 struct mpic_reg_bank {
 244         u32 __iomem     *base;
 245 #ifdef CONFIG_PPC_DCR
 246         dcr_host_t      dhost;
 247 #endif /* CONFIG_PPC_DCR */
 248 };
 249
 250 struct mpic_irq_save {
 251         u32             vecprio,
 252                         dest;
 253 #ifdef CONFIG_MPIC_U3_HT_IRQS
 254         u32             fixup_data;
 255 #endif
 256 };
 257
 258 /* The instance data of a given MPIC */
 259 struct mpic
 260 {
 261         /* The OpenFirmware dt node for this MPIC */
 262         struct device_node *node;
 263
 264         /* The remapper for this MPIC */
 265         struct irq_domain       *irqhost;
 266
 267         /* The "linux" controller struct */
 268         struct irq_chip         hc_irq;
 269 #ifdef CONFIG_MPIC_U3_HT_IRQS
 270         struct irq_chip         hc_ht_irq;
 271 #endif
 272 #ifdef CONFIG_SMP
 273         struct irq_chip         hc_ipi;
 274 #endif
 275         struct irq_chip         hc_tm;
 276         struct irq_chip         hc_err;
 277         const char              *name;
 278         /* Flags */
 279         unsigned int            flags;
 280         /* How many irq sources in a given ISU */
 281         unsigned int            isu_size;
 282         unsigned int            isu_shift;
 283         unsigned int            isu_mask;
 284         /* Number of sources */
 285         unsigned int            num_sources;
 286
 287         /* vector numbers used for internal sources (ipi/timers) */
 288         unsigned int            ipi_vecs[4];
 289         unsigned int            timer_vecs[8];
 290         /* vector numbers used for FSL MPIC error interrupts */
 291         unsigned int            err_int_vecs[MPIC_MAX_ERR];
 292
 293         /* Spurious vector to program into unused sources */
 294         unsigned int            spurious_vec;
 295
 296 #ifdef CONFIG_MPIC_U3_HT_IRQS
 297         /* The fixup table */
 298         struct mpic_irq_fixup   *fixups;
 299         raw_spinlock_t  fixup_lock;
 300 #endif
 301
 302         /* Register access method */
 303         enum mpic_reg_type      reg_type;
 304
 305         /* The physical base address of the MPIC */
 306         phys_addr_t paddr;
 307
 308         /* The various ioremap'ed bases */
 309         struct mpic_reg_bank    thiscpuregs;
 310         struct mpic_reg_bank    gregs;
 311         struct mpic_reg_bank    tmregs;
 312         struct mpic_reg_bank    cpuregs[MPIC_MAX_CPUS];
 313         struct mpic_reg_bank    isus[MPIC_MAX_ISU];
 314
 315         /* ioremap'ed base for error interrupt registers */
 316         u32 __iomem     *err_regs;
 317
 318         /* Protected sources */
 319         unsigned long           *protected;
 320
 321 #ifdef CONFIG_MPIC_WEIRD
 322         /* Pointer to HW info array */
 323         u32                     *hw_set;
 324 #endif
 325
 326 #ifdef CONFIG_PCI_MSI
 327         struct msi_bitmap       msi_bitmap;
 328 #endif
 329
 330 #ifdef CONFIG_MPIC_BROKEN_REGREAD
 331         u32                     isu_reg0_shadow[MPIC_MAX_IRQ_SOURCES];
 332 #endif
 333
 334         /* link */
 335         struct mpic             *next;
 336
 337 #ifdef CONFIG_PM
 338         struct mpic_irq_save    *save_data;
 339 #endif
 340 };
 341
 342 extern struct bus_type mpic_subsys;
 343
 344 /*
 345  * MPIC flags (passed to mpic_alloc)
 346  *
 347  * The top 4 bits contain an MPIC bhw id that is used to index the
 348  * register offsets and some masks when CONFIG_MPIC_WEIRD is set.
 349  * Note setting any ID (leaving those bits to 0) means standard MPIC
 350  */
 351
 352 /*
 353  * This is a secondary ("chained") controller; it only uses the CPU0
 354  * registers.  Primary controllers have IPIs and affinity control.
 355  */
 356 #define MPIC_SECONDARY                  0x00000001
 357
 358 /* Set this for a big-endian MPIC */
 359 #define MPIC_BIG_ENDIAN                 0x00000002
 360 /* Broken U3 MPIC */
 361 #define MPIC_U3_HT_IRQS                 0x00000004
 362 /* Broken IPI registers (autodetected) */
 363 #define MPIC_BROKEN_IPI                 0x00000008
 364 /* Spurious vector requires EOI */
 365 #define MPIC_SPV_EOI                    0x00000020
 366 /* No passthrough disable */
 367 #define MPIC_NO_PTHROU_DIS              0x00000040
 368 /* DCR based MPIC */
 369 #define MPIC_USES_DCR                   0x00000080
 370 /* MPIC has 11-bit vector fields (or larger) */
 371 #define MPIC_LARGE_VECTORS              0x00000100
 372 /* Enable delivery of prio 15 interrupts as MCK instead of EE */
 373 #define MPIC_ENABLE_MCK                 0x00000200
 374 /* Disable bias among target selection, spread interrupts evenly */
 375 #define MPIC_NO_BIAS                    0x00000400
 376 /* Destination only supports a single CPU at a time */
 377 #define MPIC_SINGLE_DEST_CPU            0x00001000
 378 /* Enable CoreInt delivery of interrupts */
 379 #define MPIC_ENABLE_COREINT             0x00002000
 380 /* Do not reset the MPIC during initialization */
 381 #define MPIC_NO_RESET                   0x00004000
 382 /* Freescale MPIC (compatible includes "fsl,mpic") */
 383 #define MPIC_FSL                        0x00008000
 384 /* Freescale MPIC supports EIMR (error interrupt mask register).
 385  * This flag is set for MPIC version >= 4.1 (version determined
 386  * from the BRR1 register).
 387 */
 388 #define MPIC_FSL_HAS_EIMR               0x00010000
 389
 390 /* MPIC HW modification ID */
 391 #define MPIC_REGSET_MASK                0xf0000000
 392 #define MPIC_REGSET(val)                (((val) & 0xf ) << 28)
 393 #define MPIC_GET_REGSET(flags)          (((flags) >> 28) & 0xf)
 394
 395 #define MPIC_REGSET_STANDARD            MPIC_REGSET(0)  /* Original MPIC */
 396 #define MPIC_REGSET_TSI108              MPIC_REGSET(1)  /* Tsi108/109 PIC */
 397
 398 /* Get the version of primary MPIC */
 399 #ifdef CONFIG_MPIC
 400 extern u32 fsl_mpic_primary_get_version(void);
 401 #else
 402 static inline u32 fsl_mpic_primary_get_version(void)
 403 {
 404         return 0;
 405 }
 406 #endif
 407
 408 /* Allocate the controller structure and setup the linux irq descs
 409  * for the range if interrupts passed in. No HW initialization is
 410  * actually performed.
 411  *
 412  * @phys_addr:  physial base address of the MPIC
 413  * @flags:      flags, see constants above
 414  * @isu_size:   number of interrupts in an ISU. Use 0 to use a
 415  *              standard ISU-less setup (aka powermac)
 416  * @irq_offset: first irq number to assign to this mpic
 417  * @irq_count:  number of irqs to use with this mpic IRQ sources. Pass 0
 418  *              to match the number of sources
 419  * @ipi_offset: first irq number to assign to this mpic IPI sources,
 420  *              used only on primary mpic
 421  * @senses:     array of sense values
 422  * @senses_num: number of entries in the array
 423  *
 424  * Note about the sense array. If none is passed, all interrupts are
 425  * setup to be level negative unless MPIC_U3_HT_IRQS is set in which
 426  * case they are edge positive (and the array is ignored anyway).
 427  * The values in the array start at the first source of the MPIC,
 428  * that is senses[0] correspond to linux irq "irq_offset".
 429  */
 430 extern struct mpic *mpic_alloc(struct device_node *node,
 431                                phys_addr_t phys_addr,
 432                                unsigned int flags,
 433                                unsigned int isu_size,
 434                                unsigned int irq_count,
 435                                const char *name);
 436
 437 /* Assign ISUs, to call before mpic_init()
 438  *
 439  * @mpic:       controller structure as returned by mpic_alloc()
 440  * @isu_num:    ISU number
 441  * @phys_addr:  physical address of the ISU
 442  */
 443 extern void mpic_assign_isu(struct mpic *mpic, unsigned int isu_num,
 444                             phys_addr_t phys_addr);
 445
 446
 447 /* Initialize the controller. After this has been called, none of the above
 448  * should be called again for this mpic
 449  */
 450 extern void mpic_init(struct mpic *mpic);
 451
 452 /*
 453  * All of the following functions must only be used after the
 454  * ISUs have been assigned and the controller fully initialized
 455  * with mpic_init()
 456  */
 457
 458
 459 /* Change the priority of an interrupt. Default is 8 for irqs and
 460  * 10 for IPIs. You can call this on both IPIs and IRQ numbers, but the
 461  * IPI number is then the offset'ed (linux irq number mapped to the IPI)
 462  */
 463 extern void mpic_irq_set_priority(unsigned int irq, unsigned int pri);
 464
 465 /* Setup a non-boot CPU */
 466 extern void mpic_setup_this_cpu(void);
 467
 468 /* Clean up for kexec (or cpu offline or ...) */
 469 extern void mpic_teardown_this_cpu(int secondary);
 470
 471 /* Get the current cpu priority for this cpu (0..15) */
 472 extern int mpic_cpu_get_priority(void);
 473
 474 /* Set the current cpu priority for this cpu */
 475 extern void mpic_cpu_set_priority(int prio);
 476
 477 /* Request IPIs on primary mpic */
 478 extern void mpic_request_ipis(void);
 479
 480 /* Send a message (IPI) to a given target (cpu number or MSG_*) */
 481 void smp_mpic_message_pass(int target, int msg);
 482
 483 /* Unmask a specific virq */
 484 extern void mpic_unmask_irq(struct irq_data *d);
 485 /* Mask a specific virq */
 486 extern void mpic_mask_irq(struct irq_data *d);
 487 /* EOI a specific virq */
 488 extern void mpic_end_irq(struct irq_data *d);
 489
 490 /* Fetch interrupt from a given mpic */
 491 extern unsigned int mpic_get_one_irq(struct mpic *mpic);
 492 /* This one gets from the primary mpic */
 493 extern unsigned int mpic_get_irq(void);
 494 /* This one gets from the primary mpic via CoreInt*/
 495 extern unsigned int mpic_get_coreint_irq(void);
 496 /* Fetch Machine Check interrupt from primary mpic */
 497 extern unsigned int mpic_get_mcirq(void);
 498
 499 /* Set the EPIC clock ratio */
 500 void mpic_set_clk_ratio(struct mpic *mpic, u32 clock_ratio);
 501
 502 /* Enable/Disable EPIC serial interrupt mode */
 503 void mpic_set_serial_int(struct mpic *mpic, int enable);
 504
 505 #endif /* __KERNEL__ */
 506 #endif  /* _ASM_POWERPC_MPIC_H */