include/asm-powerpc/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 <linux/sysdev.h>
   7 #include <asm/dcr.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 #define         MPIC_GREG_GCONF_8259_PTHROU_DIS         0x20000000
  25 #define         MPIC_GREG_GCONF_BASE_MASK               0x000fffff
  26 #define MPIC_GREG_GLOBAL_CONF_1         0x00030
  27 #define         MPIC_GREG_GLOBAL_CONF_1_SIE             0x08000000
  28 #define         MPIC_GREG_GLOBAL_CONF_1_CLK_RATIO_MASK  0x70000000
  29 #define         MPIC_GREG_GLOBAL_CONF_1_CLK_RATIO(r)    \
  30                         (((r) << 28) & MPIC_GREG_GLOBAL_CONF_1_CLK_RATIO_MASK)
  31 #define MPIC_GREG_VENDOR_0              0x00040
  32 #define MPIC_GREG_VENDOR_1              0x00050
  33 #define MPIC_GREG_VENDOR_2              0x00060
  34 #define MPIC_GREG_VENDOR_3              0x00070
  35 #define MPIC_GREG_VENDOR_ID             0x00080
  36 #define         MPIC_GREG_VENDOR_ID_STEPPING_MASK       0x00ff0000
  37 #define         MPIC_GREG_VENDOR_ID_STEPPING_SHIFT      16
  38 #define         MPIC_GREG_VENDOR_ID_DEVICE_ID_MASK      0x0000ff00
  39 #define         MPIC_GREG_VENDOR_ID_DEVICE_ID_SHIFT     8
  40 #define         MPIC_GREG_VENDOR_ID_VENDOR_ID_MASK      0x000000ff
  41 #define MPIC_GREG_PROCESSOR_INIT        0x00090
  42 #define MPIC_GREG_IPI_VECTOR_PRI_0      0x000a0
  43 #define MPIC_GREG_IPI_VECTOR_PRI_1      0x000b0
  44 #define MPIC_GREG_IPI_VECTOR_PRI_2      0x000c0
  45 #define MPIC_GREG_IPI_VECTOR_PRI_3      0x000d0
  46 #define MPIC_GREG_IPI_STRIDE            0x10
  47 #define MPIC_GREG_SPURIOUS              0x000e0
  48 #define MPIC_GREG_TIMER_FREQ            0x000f0
  49
  50 /*
  51  *
  52  * Timer registers
  53  */
  54 #define MPIC_TIMER_BASE                 0x01100
  55 #define MPIC_TIMER_STRIDE               0x40
  56
  57 #define MPIC_TIMER_CURRENT_CNT          0x00000
  58 #define MPIC_TIMER_BASE_CNT             0x00010
  59 #define MPIC_TIMER_VECTOR_PRI           0x00020
  60 #define MPIC_TIMER_DESTINATION          0x00030
  61
  62 /*
  63  * Per-Processor registers
  64  */
  65
  66 #define MPIC_CPU_THISBASE               0x00000
  67 #define MPIC_CPU_BASE                   0x20000
  68 #define MPIC_CPU_STRIDE                 0x01000
  69
  70 #define MPIC_CPU_IPI_DISPATCH_0         0x00040
  71 #define MPIC_CPU_IPI_DISPATCH_1         0x00050
  72 #define MPIC_CPU_IPI_DISPATCH_2         0x00060
  73 #define MPIC_CPU_IPI_DISPATCH_3         0x00070
  74 #define MPIC_CPU_IPI_DISPATCH_STRIDE    0x00010
  75 #define MPIC_CPU_CURRENT_TASK_PRI       0x00080
  76 #define         MPIC_CPU_TASKPRI_MASK                   0x0000000f
  77 #define MPIC_CPU_WHOAMI                 0x00090
  78 #define         MPIC_CPU_WHOAMI_MASK                    0x0000001f
  79 #define MPIC_CPU_INTACK                 0x000a0
  80 #define MPIC_CPU_EOI                    0x000b0
  81
  82 /*
  83  * Per-source registers
  84  */
  85
  86 #define MPIC_IRQ_BASE                   0x10000
  87 #define MPIC_IRQ_STRIDE                 0x00020
  88 #define MPIC_IRQ_VECTOR_PRI             0x00000
  89 #define         MPIC_VECPRI_MASK                        0x80000000
  90 #define         MPIC_VECPRI_ACTIVITY                    0x40000000      /* Read Only */
  91 #define         MPIC_VECPRI_PRIORITY_MASK               0x000f0000
  92 #define         MPIC_VECPRI_PRIORITY_SHIFT              16
  93 #define         MPIC_VECPRI_VECTOR_MASK                 0x000007ff
  94 #define         MPIC_VECPRI_POLARITY_POSITIVE           0x00800000
  95 #define         MPIC_VECPRI_POLARITY_NEGATIVE           0x00000000
  96 #define         MPIC_VECPRI_POLARITY_MASK               0x00800000
  97 #define         MPIC_VECPRI_SENSE_LEVEL                 0x00400000
  98 #define         MPIC_VECPRI_SENSE_EDGE                  0x00000000
  99 #define         MPIC_VECPRI_SENSE_MASK                  0x00400000
 100 #define MPIC_IRQ_DESTINATION            0x00010
 101
 102 #define MPIC_MAX_IRQ_SOURCES    2048
 103 #define MPIC_MAX_CPUS           32
 104 #define MPIC_MAX_ISU            32
 105
 106 /*
 107  * Tsi108 implementation of MPIC has many differences from the original one
 108  */
 109
 110 /*
 111  * Global registers
 112  */
 113
 114 #define TSI108_GREG_BASE                0x00000
 115 #define TSI108_GREG_FEATURE_0           0x00000
 116 #define TSI108_GREG_GLOBAL_CONF_0       0x00004
 117 #define TSI108_GREG_VENDOR_ID           0x0000c
 118 #define TSI108_GREG_IPI_VECTOR_PRI_0    0x00204         /* Doorbell 0 */
 119 #define TSI108_GREG_IPI_STRIDE          0x0c
 120 #define TSI108_GREG_SPURIOUS            0x00010
 121 #define TSI108_GREG_TIMER_FREQ          0x00014
 122
 123 /*
 124  * Timer registers
 125  */
 126 #define TSI108_TIMER_BASE               0x0030
 127 #define TSI108_TIMER_STRIDE             0x10
 128 #define TSI108_TIMER_CURRENT_CNT        0x00000
 129 #define TSI108_TIMER_BASE_CNT           0x00004
 130 #define TSI108_TIMER_VECTOR_PRI         0x00008
 131 #define TSI108_TIMER_DESTINATION        0x0000c
 132
 133 /*
 134  * Per-Processor registers
 135  */
 136 #define TSI108_CPU_BASE                 0x00300
 137 #define TSI108_CPU_STRIDE               0x00040
 138 #define TSI108_CPU_IPI_DISPATCH_0       0x00200
 139 #define TSI108_CPU_IPI_DISPATCH_STRIDE  0x00000
 140 #define TSI108_CPU_CURRENT_TASK_PRI     0x00000
 141 #define TSI108_CPU_WHOAMI               0xffffffff
 142 #define TSI108_CPU_INTACK               0x00004
 143 #define TSI108_CPU_EOI                  0x00008
 144
 145 /*
 146  * Per-source registers
 147  */
 148 #define TSI108_IRQ_BASE                 0x00100
 149 #define TSI108_IRQ_STRIDE               0x00008
 150 #define TSI108_IRQ_VECTOR_PRI           0x00000
 151 #define TSI108_VECPRI_VECTOR_MASK       0x000000ff
 152 #define TSI108_VECPRI_POLARITY_POSITIVE 0x01000000
 153 #define TSI108_VECPRI_POLARITY_NEGATIVE 0x00000000
 154 #define TSI108_VECPRI_SENSE_LEVEL       0x02000000
 155 #define TSI108_VECPRI_SENSE_EDGE        0x00000000
 156 #define TSI108_VECPRI_POLARITY_MASK     0x01000000
 157 #define TSI108_VECPRI_SENSE_MASK        0x02000000
 158 #define TSI108_IRQ_DESTINATION          0x00004
 159
 160 /* weird mpic register indices and mask bits in the HW info array */
 161 enum {
 162         MPIC_IDX_GREG_BASE = 0,
 163         MPIC_IDX_GREG_FEATURE_0,
 164         MPIC_IDX_GREG_GLOBAL_CONF_0,
 165         MPIC_IDX_GREG_VENDOR_ID,
 166         MPIC_IDX_GREG_IPI_VECTOR_PRI_0,
 167         MPIC_IDX_GREG_IPI_STRIDE,
 168         MPIC_IDX_GREG_SPURIOUS,
 169         MPIC_IDX_GREG_TIMER_FREQ,
 170
 171         MPIC_IDX_TIMER_BASE,
 172         MPIC_IDX_TIMER_STRIDE,
 173         MPIC_IDX_TIMER_CURRENT_CNT,
 174         MPIC_IDX_TIMER_BASE_CNT,
 175         MPIC_IDX_TIMER_VECTOR_PRI,
 176         MPIC_IDX_TIMER_DESTINATION,
 177
 178         MPIC_IDX_CPU_BASE,
 179         MPIC_IDX_CPU_STRIDE,
 180         MPIC_IDX_CPU_IPI_DISPATCH_0,
 181         MPIC_IDX_CPU_IPI_DISPATCH_STRIDE,
 182         MPIC_IDX_CPU_CURRENT_TASK_PRI,
 183         MPIC_IDX_CPU_WHOAMI,
 184         MPIC_IDX_CPU_INTACK,
 185         MPIC_IDX_CPU_EOI,
 186
 187         MPIC_IDX_IRQ_BASE,
 188         MPIC_IDX_IRQ_STRIDE,
 189         MPIC_IDX_IRQ_VECTOR_PRI,
 190
 191         MPIC_IDX_VECPRI_VECTOR_MASK,
 192         MPIC_IDX_VECPRI_POLARITY_POSITIVE,
 193         MPIC_IDX_VECPRI_POLARITY_NEGATIVE,
 194         MPIC_IDX_VECPRI_SENSE_LEVEL,
 195         MPIC_IDX_VECPRI_SENSE_EDGE,
 196         MPIC_IDX_VECPRI_POLARITY_MASK,
 197         MPIC_IDX_VECPRI_SENSE_MASK,
 198         MPIC_IDX_IRQ_DESTINATION,
 199         MPIC_IDX_END
 200 };
 201
 202
 203 #ifdef CONFIG_MPIC_U3_HT_IRQS
 204 /* Fixup table entry */
 205 struct mpic_irq_fixup
 206 {
 207         u8 __iomem      *base;
 208         u8 __iomem      *applebase;
 209         u32             data;
 210         unsigned int    index;
 211 };
 212 #endif /* CONFIG_MPIC_U3_HT_IRQS */
 213
 214
 215 enum mpic_reg_type {
 216         mpic_access_mmio_le,
 217         mpic_access_mmio_be,
 218 #ifdef CONFIG_PPC_DCR
 219         mpic_access_dcr
 220 #endif
 221 };
 222
 223 struct mpic_reg_bank {
 224         u32 __iomem     *base;
 225 #ifdef CONFIG_PPC_DCR
 226         dcr_host_t      dhost;
 227 #endif /* CONFIG_PPC_DCR */
 228 };
 229
 230 struct mpic_irq_save {
 231         u32             vecprio,
 232                         dest;
 233 #ifdef CONFIG_MPIC_U3_HT_IRQS
 234         u32             fixup_data;
 235 #endif
 236 };
 237
 238 /* The instance data of a given MPIC */
 239 struct mpic
 240 {
 241         /* The remapper for this MPIC */
 242         struct irq_host         *irqhost;
 243
 244         /* The "linux" controller struct */
 245         struct irq_chip         hc_irq;
 246 #ifdef CONFIG_MPIC_U3_HT_IRQS
 247         struct irq_chip         hc_ht_irq;
 248 #endif
 249 #ifdef CONFIG_SMP
 250         struct irq_chip         hc_ipi;
 251 #endif
 252         const char              *name;
 253         /* Flags */
 254         unsigned int            flags;
 255         /* How many irq sources in a given ISU */
 256         unsigned int            isu_size;
 257         unsigned int            isu_shift;
 258         unsigned int            isu_mask;
 259         unsigned int            irq_count;
 260         /* Number of sources */
 261         unsigned int            num_sources;
 262         /* Number of CPUs */
 263         unsigned int            num_cpus;
 264         /* default senses array */
 265         unsigned char           *senses;
 266         unsigned int            senses_count;
 267
 268         /* vector numbers used for internal sources (ipi/timers) */
 269         unsigned int            ipi_vecs[4];
 270         unsigned int            timer_vecs[4];
 271
 272         /* Spurious vector to program into unused sources */
 273         unsigned int            spurious_vec;
 274
 275 #ifdef CONFIG_MPIC_U3_HT_IRQS
 276         /* The fixup table */
 277         struct mpic_irq_fixup   *fixups;
 278         spinlock_t              fixup_lock;
 279 #endif
 280
 281         /* Register access method */
 282         enum mpic_reg_type      reg_type;
 283
 284         /* The various ioremap'ed bases */
 285         struct mpic_reg_bank    gregs;
 286         struct mpic_reg_bank    tmregs;
 287         struct mpic_reg_bank    cpuregs[MPIC_MAX_CPUS];
 288         struct mpic_reg_bank    isus[MPIC_MAX_ISU];
 289
 290         /* Protected sources */
 291         unsigned long           *protected;
 292
 293 #ifdef CONFIG_MPIC_WEIRD
 294         /* Pointer to HW info array */
 295         u32                     *hw_set;
 296 #endif
 297
 298 #ifdef CONFIG_PCI_MSI
 299         spinlock_t              bitmap_lock;
 300         unsigned long           *hwirq_bitmap;
 301 #endif
 302
 303 #ifdef CONFIG_MPIC_BROKEN_REGREAD
 304         u32                     isu_reg0_shadow[MPIC_MAX_IRQ_SOURCES];
 305 #endif
 306
 307         /* link */
 308         struct mpic             *next;
 309
 310         struct sys_device       sysdev;
 311
 312 #ifdef CONFIG_PM
 313         struct mpic_irq_save    *save_data;
 314 #endif
 315 };
 316
 317 /*
 318  * MPIC flags (passed to mpic_alloc)
 319  *
 320  * The top 4 bits contain an MPIC bhw id that is used to index the
 321  * register offsets and some masks when CONFIG_MPIC_WEIRD is set.
 322  * Note setting any ID (leaving those bits to 0) means standard MPIC
 323  */
 324
 325 /* This is the primary controller, only that one has IPIs and
 326  * has afinity control. A non-primary MPIC always uses CPU0
 327  * registers only
 328  */
 329 #define MPIC_PRIMARY                    0x00000001
 330
 331 /* Set this for a big-endian MPIC */
 332 #define MPIC_BIG_ENDIAN                 0x00000002
 333 /* Broken U3 MPIC */
 334 #define MPIC_U3_HT_IRQS                 0x00000004
 335 /* Broken IPI registers (autodetected) */
 336 #define MPIC_BROKEN_IPI                 0x00000008
 337 /* MPIC wants a reset */
 338 #define MPIC_WANTS_RESET                0x00000010
 339 /* Spurious vector requires EOI */
 340 #define MPIC_SPV_EOI                    0x00000020
 341 /* No passthrough disable */
 342 #define MPIC_NO_PTHROU_DIS              0x00000040
 343 /* DCR based MPIC */
 344 #define MPIC_USES_DCR                   0x00000080
 345 /* MPIC has 11-bit vector fields (or larger) */
 346 #define MPIC_LARGE_VECTORS              0x00000100
 347
 348 /* MPIC HW modification ID */
 349 #define MPIC_REGSET_MASK                0xf0000000
 350 #define MPIC_REGSET(val)                (((val) & 0xf ) << 28)
 351 #define MPIC_GET_REGSET(flags)          (((flags) >> 28) & 0xf)
 352
 353 #define MPIC_REGSET_STANDARD            MPIC_REGSET(0)  /* Original MPIC */
 354 #define MPIC_REGSET_TSI108              MPIC_REGSET(1)  /* Tsi108/109 PIC */
 355
 356 /* Allocate the controller structure and setup the linux irq descs
 357  * for the range if interrupts passed in. No HW initialization is
 358  * actually performed.
 359  *
 360  * @phys_addr:  physial base address of the MPIC
 361  * @flags:      flags, see constants above
 362  * @isu_size:   number of interrupts in an ISU. Use 0 to use a
 363  *              standard ISU-less setup (aka powermac)
 364  * @irq_offset: first irq number to assign to this mpic
 365  * @irq_count:  number of irqs to use with this mpic IRQ sources. Pass 0
 366  *              to match the number of sources
 367  * @ipi_offset: first irq number to assign to this mpic IPI sources,
 368  *              used only on primary mpic
 369  * @senses:     array of sense values
 370  * @senses_num: number of entries in the array
 371  *
 372  * Note about the sense array. If none is passed, all interrupts are
 373  * setup to be level negative unless MPIC_U3_HT_IRQS is set in which
 374  * case they are edge positive (and the array is ignored anyway).
 375  * The values in the array start at the first source of the MPIC,
 376  * that is senses[0] correspond to linux irq "irq_offset".
 377  */
 378 extern struct mpic *mpic_alloc(struct device_node *node,
 379                                phys_addr_t phys_addr,
 380                                unsigned int flags,
 381                                unsigned int isu_size,
 382                                unsigned int irq_count,
 383                                const char *name);
 384
 385 /* Assign ISUs, to call before mpic_init()
 386  *
 387  * @mpic:       controller structure as returned by mpic_alloc()
 388  * @isu_num:    ISU number
 389  * @phys_addr:  physical address of the ISU
 390  */
 391 extern void mpic_assign_isu(struct mpic *mpic, unsigned int isu_num,
 392                             phys_addr_t phys_addr);
 393
 394 /* Set default sense codes
 395  *
 396  * @mpic:       controller
 397  * @senses:     array of sense codes
 398  * @count:      size of above array
 399  *
 400  * Optionally provide an array (indexed on hardware interrupt numbers
 401  * for this MPIC) of default sense codes for the chip. Those are linux
 402  * sense codes IRQ_TYPE_*
 403  *
 404  * The driver gets ownership of the pointer, don't dispose of it or
 405  * anything like that. __init only.
 406  */
 407 extern void mpic_set_default_senses(struct mpic *mpic, u8 *senses, int count);
 408
 409
 410 /* Initialize the controller. After this has been called, none of the above
 411  * should be called again for this mpic
 412  */
 413 extern void mpic_init(struct mpic *mpic);
 414
 415 /*
 416  * All of the following functions must only be used after the
 417  * ISUs have been assigned and the controller fully initialized
 418  * with mpic_init()
 419  */
 420
 421
 422 /* Change/Read the priority of an interrupt. Default is 8 for irqs and
 423  * 10 for IPIs. You can call this on both IPIs and IRQ numbers, but the
 424  * IPI number is then the offset'ed (linux irq number mapped to the IPI)
 425  */
 426 extern void mpic_irq_set_priority(unsigned int irq, unsigned int pri);
 427 extern unsigned int mpic_irq_get_priority(unsigned int irq);
 428
 429 /* Setup a non-boot CPU */
 430 extern void mpic_setup_this_cpu(void);
 431
 432 /* Clean up for kexec (or cpu offline or ...) */
 433 extern void mpic_teardown_this_cpu(int secondary);
 434
 435 /* Get the current cpu priority for this cpu (0..15) */
 436 extern int mpic_cpu_get_priority(void);
 437
 438 /* Set the current cpu priority for this cpu */
 439 extern void mpic_cpu_set_priority(int prio);
 440
 441 /* Request IPIs on primary mpic */
 442 extern void mpic_request_ipis(void);
 443
 444 /* Send an IPI (non offseted number 0..3) */
 445 extern void mpic_send_ipi(unsigned int ipi_no, unsigned int cpu_mask);
 446
 447 /* Send a message (IPI) to a given target (cpu number or MSG_*) */
 448 void smp_mpic_message_pass(int target, int msg);
 449
 450 /* Fetch interrupt from a given mpic */
 451 extern unsigned int mpic_get_one_irq(struct mpic *mpic);
 452 /* This one gets to the primary mpic */
 453 extern unsigned int mpic_get_irq(void);
 454
 455 /* Set the EPIC clock ratio */
 456 void mpic_set_clk_ratio(struct mpic *mpic, u32 clock_ratio);
 457
 458 /* Enable/Disable EPIC serial interrupt mode */
 459 void mpic_set_serial_int(struct mpic *mpic, int enable);
 460
 461 #endif /* __KERNEL__ */
 462 #endif  /* _ASM_POWERPC_MPIC_H */