arch/mips/include/asm/gic.h

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2000, 07 MIPS Technologies, Inc.
   7  *
   8  * GIC Register Definitions
   9  *
  10  */
  11 #ifndef _ASM_GICREGS_H
  12 #define _ASM_GICREGS_H
  13
  14 #include <linux/bitmap.h>
  15 #include <linux/threads.h>
  16
  17 #include <irq.h>
  18
  19 #undef  GICISBYTELITTLEENDIAN
  20
  21 /* Constants */
  22 #define GIC_POL_POS                     1
  23 #define GIC_POL_NEG                     0
  24 #define GIC_TRIG_EDGE                   1
  25 #define GIC_TRIG_LEVEL                  0
  26
  27 #define MSK(n) ((1 << (n)) - 1)
  28 #define REG32(addr)             (*(volatile unsigned int *) (addr))
  29 #define REG(base, offs)         REG32((unsigned long)(base) + offs##_##OFS)
  30 #define REGP(base, phys)        REG32((unsigned long)(base) + (phys))
  31
  32 /* Accessors */
  33 #define GIC_REG(segment, offset) \
  34         REG32(_gic_base + segment##_##SECTION_OFS + offset##_##OFS)
  35 #define GIC_REG_ADDR(segment, offset) \
  36         REG32(_gic_base + segment##_##SECTION_OFS + offset)
  37
  38 #define GIC_ABS_REG(segment, offset) \
  39         (_gic_base + segment##_##SECTION_OFS + offset##_##OFS)
  40 #define GIC_REG_ABS_ADDR(segment, offset) \
  41         (_gic_base + segment##_##SECTION_OFS + offset)
  42
  43 #ifdef GICISBYTELITTLEENDIAN
  44 #define GICREAD(reg, data)      ((data) = (reg), (data) = le32_to_cpu(data))
  45 #define GICWRITE(reg, data)     ((reg) = cpu_to_le32(data))
  46 #else
  47 #define GICREAD(reg, data)      ((data) = (reg))
  48 #define GICWRITE(reg, data)     ((reg) = (data))
  49 #endif
  50 #define GICBIS(reg, mask, bits)                 \
  51         do { u32 data;                          \
  52                 GICREAD(reg, data);             \
  53                 data &= ~(mask);                \
  54                 data |= ((bits) & (mask));      \
  55                 GICWRITE((reg), data);          \
  56         } while (0)
  57
  58
  59 /* GIC Address Space */
  60 #define SHARED_SECTION_OFS              0x0000
  61 #define SHARED_SECTION_SIZE             0x8000
  62 #define VPE_LOCAL_SECTION_OFS           0x8000
  63 #define VPE_LOCAL_SECTION_SIZE          0x4000
  64 #define VPE_OTHER_SECTION_OFS           0xc000
  65 #define VPE_OTHER_SECTION_SIZE          0x4000
  66 #define USM_VISIBLE_SECTION_OFS         0x10000
  67 #define USM_VISIBLE_SECTION_SIZE        0x10000
  68
  69 /* Register Map for Shared Section */
  70
  71 #define GIC_SH_CONFIG_OFS               0x0000
  72
  73 /* Shared Global Counter */
  74 #define GIC_SH_COUNTER_31_00_OFS        0x0010
  75 #define GIC_SH_COUNTER_63_32_OFS        0x0014
  76 #define GIC_SH_REVISIONID_OFS           0x0020
  77
  78 /* Interrupt Polarity */
  79 #define GIC_SH_POL_31_0_OFS             0x0100
  80 #define GIC_SH_POL_63_32_OFS            0x0104
  81 #define GIC_SH_POL_95_64_OFS            0x0108
  82 #define GIC_SH_POL_127_96_OFS           0x010c
  83 #define GIC_SH_POL_159_128_OFS          0x0110
  84 #define GIC_SH_POL_191_160_OFS          0x0114
  85 #define GIC_SH_POL_223_192_OFS          0x0118
  86 #define GIC_SH_POL_255_224_OFS          0x011c
  87
  88 /* Edge/Level Triggering */
  89 #define GIC_SH_TRIG_31_0_OFS            0x0180
  90 #define GIC_SH_TRIG_63_32_OFS           0x0184
  91 #define GIC_SH_TRIG_95_64_OFS           0x0188
  92 #define GIC_SH_TRIG_127_96_OFS          0x018c
  93 #define GIC_SH_TRIG_159_128_OFS         0x0190
  94 #define GIC_SH_TRIG_191_160_OFS         0x0194
  95 #define GIC_SH_TRIG_223_192_OFS         0x0198
  96 #define GIC_SH_TRIG_255_224_OFS         0x019c
  97
  98 /* Dual Edge Triggering */
  99 #define GIC_SH_DUAL_31_0_OFS            0x0200
 100 #define GIC_SH_DUAL_63_32_OFS           0x0204
 101 #define GIC_SH_DUAL_95_64_OFS           0x0208
 102 #define GIC_SH_DUAL_127_96_OFS          0x020c
 103 #define GIC_SH_DUAL_159_128_OFS         0x0210
 104 #define GIC_SH_DUAL_191_160_OFS         0x0214
 105 #define GIC_SH_DUAL_223_192_OFS         0x0218
 106 #define GIC_SH_DUAL_255_224_OFS         0x021c
 107
 108 /* Set/Clear corresponding bit in Edge Detect Register */
 109 #define GIC_SH_WEDGE_OFS                0x0280
 110
 111 /* Reset Mask - Disables Interrupt */
 112 #define GIC_SH_RMASK_31_0_OFS           0x0300
 113 #define GIC_SH_RMASK_63_32_OFS          0x0304
 114 #define GIC_SH_RMASK_95_64_OFS          0x0308
 115 #define GIC_SH_RMASK_127_96_OFS         0x030c
 116 #define GIC_SH_RMASK_159_128_OFS        0x0310
 117 #define GIC_SH_RMASK_191_160_OFS        0x0314
 118 #define GIC_SH_RMASK_223_192_OFS        0x0318
 119 #define GIC_SH_RMASK_255_224_OFS        0x031c
 120
 121 /* Set Mask (WO) - Enables Interrupt */
 122 #define GIC_SH_SMASK_31_0_OFS           0x0380
 123 #define GIC_SH_SMASK_63_32_OFS          0x0384
 124 #define GIC_SH_SMASK_95_64_OFS          0x0388
 125 #define GIC_SH_SMASK_127_96_OFS         0x038c
 126 #define GIC_SH_SMASK_159_128_OFS        0x0390
 127 #define GIC_SH_SMASK_191_160_OFS        0x0394
 128 #define GIC_SH_SMASK_223_192_OFS        0x0398
 129 #define GIC_SH_SMASK_255_224_OFS        0x039c
 130
 131 /* Global Interrupt Mask Register (RO) - Bit Set == Interrupt enabled */
 132 #define GIC_SH_MASK_31_0_OFS            0x0400
 133 #define GIC_SH_MASK_63_32_OFS           0x0404
 134 #define GIC_SH_MASK_95_64_OFS           0x0408
 135 #define GIC_SH_MASK_127_96_OFS          0x040c
 136 #define GIC_SH_MASK_159_128_OFS         0x0410
 137 #define GIC_SH_MASK_191_160_OFS         0x0414
 138 #define GIC_SH_MASK_223_192_OFS         0x0418
 139 #define GIC_SH_MASK_255_224_OFS         0x041c
 140
 141 /* Pending Global Interrupts (RO) */
 142 #define GIC_SH_PEND_31_0_OFS            0x0480
 143 #define GIC_SH_PEND_63_32_OFS           0x0484
 144 #define GIC_SH_PEND_95_64_OFS           0x0488
 145 #define GIC_SH_PEND_127_96_OFS          0x048c
 146 #define GIC_SH_PEND_159_128_OFS         0x0490
 147 #define GIC_SH_PEND_191_160_OFS         0x0494
 148 #define GIC_SH_PEND_223_192_OFS         0x0498
 149 #define GIC_SH_PEND_255_224_OFS         0x049c
 150
 151 #define GIC_SH_INTR_MAP_TO_PIN_BASE_OFS 0x0500
 152
 153 /* Maps Interrupt X to a Pin */
 154 #define GIC_SH_MAP_TO_PIN(intr) \
 155         (GIC_SH_INTR_MAP_TO_PIN_BASE_OFS + (4 * intr))
 156
 157 #define GIC_SH_INTR_MAP_TO_VPE_BASE_OFS 0x2000
 158
 159 /* Maps Interrupt X to a VPE */
 160 #define GIC_SH_MAP_TO_VPE_REG_OFF(intr, vpe) \
 161         (GIC_SH_INTR_MAP_TO_VPE_BASE_OFS + (32 * (intr)) + (((vpe) / 32) * 4))
 162 #define GIC_SH_MAP_TO_VPE_REG_BIT(vpe)  (1 << ((vpe) % 32))
 163
 164 /* Convert an interrupt number to a byte offset/bit for multi-word registers */
 165 #define GIC_INTR_OFS(intr) (((intr) / 32)*4)
 166 #define GIC_INTR_BIT(intr) ((intr) % 32)
 167
 168 /* Polarity : Reset Value is always 0 */
 169 #define GIC_SH_SET_POLARITY_OFS         0x0100
 170 #define GIC_SET_POLARITY(intr, pol) \
 171         GICBIS(GIC_REG_ADDR(SHARED, GIC_SH_SET_POLARITY_OFS + \
 172                 GIC_INTR_OFS(intr)), (1 << GIC_INTR_BIT(intr)), \
 173                 (pol) << GIC_INTR_BIT(intr))
 174
 175 /* Triggering : Reset Value is always 0 */
 176 #define GIC_SH_SET_TRIGGER_OFS          0x0180
 177 #define GIC_SET_TRIGGER(intr, trig) \
 178         GICBIS(GIC_REG_ADDR(SHARED, GIC_SH_SET_TRIGGER_OFS + \
 179                 GIC_INTR_OFS(intr)), (1 << GIC_INTR_BIT(intr)), \
 180                 (trig) << GIC_INTR_BIT(intr))
 181
 182 /* Mask manipulation */
 183 #define GIC_SH_SMASK_OFS                0x0380
 184 #define GIC_SET_INTR_MASK(intr) \
 185         GICWRITE(GIC_REG_ADDR(SHARED, GIC_SH_SMASK_OFS + \
 186                 GIC_INTR_OFS(intr)), 1 << GIC_INTR_BIT(intr))
 187 #define GIC_SH_RMASK_OFS                0x0300
 188 #define GIC_CLR_INTR_MASK(intr) \
 189         GICWRITE(GIC_REG_ADDR(SHARED, GIC_SH_RMASK_OFS + \
 190                 GIC_INTR_OFS(intr)), 1 << GIC_INTR_BIT(intr))
 191
 192 /* Register Map for Local Section */
 193 #define GIC_VPE_CTL_OFS                 0x0000
 194 #define GIC_VPE_PEND_OFS                0x0004
 195 #define GIC_VPE_MASK_OFS                0x0008
 196 #define GIC_VPE_RMASK_OFS               0x000c
 197 #define GIC_VPE_SMASK_OFS               0x0010
 198 #define GIC_VPE_WD_MAP_OFS              0x0040
 199 #define GIC_VPE_COMPARE_MAP_OFS         0x0044
 200 #define GIC_VPE_TIMER_MAP_OFS           0x0048
 201 #define GIC_VPE_PERFCTR_MAP_OFS         0x0050
 202 #define GIC_VPE_SWINT0_MAP_OFS          0x0054
 203 #define GIC_VPE_SWINT1_MAP_OFS          0x0058
 204 #define GIC_VPE_OTHER_ADDR_OFS          0x0080
 205 #define GIC_VPE_WD_CONFIG0_OFS          0x0090
 206 #define GIC_VPE_WD_COUNT0_OFS           0x0094
 207 #define GIC_VPE_WD_INITIAL0_OFS         0x0098
 208 #define GIC_VPE_COMPARE_LO_OFS          0x00a0
 209 #define GIC_VPE_COMPARE_HI_OFS          0x00a4
 210
 211 #define GIC_VPE_EIC_SHADOW_SET_BASE     0x0100
 212 #define GIC_VPE_EIC_SS(intr) \
 213         (GIC_VPE_EIC_SHADOW_SET_BASE + (4 * intr))
 214
 215 #define GIC_VPE_EIC_VEC_BASE            0x0800
 216 #define GIC_VPE_EIC_VEC(intr) \
 217         (GIC_VPE_EIC_VEC_BASE + (4 * intr))
 218
 219 #define GIC_VPE_TENABLE_NMI_OFS         0x1000
 220 #define GIC_VPE_TENABLE_YQ_OFS          0x1004
 221 #define GIC_VPE_TENABLE_INT_31_0_OFS    0x1080
 222 #define GIC_VPE_TENABLE_INT_63_32_OFS   0x1084
 223
 224 /* User Mode Visible Section Register Map */
 225 #define GIC_UMV_SH_COUNTER_31_00_OFS    0x0000
 226 #define GIC_UMV_SH_COUNTER_63_32_OFS    0x0004
 227
 228 /* Masks */
 229 #define GIC_SH_CONFIG_COUNTSTOP_SHF     28
 230 #define GIC_SH_CONFIG_COUNTSTOP_MSK     (MSK(1) << GIC_SH_CONFIG_COUNTSTOP_SHF)
 231
 232 #define GIC_SH_CONFIG_COUNTBITS_SHF     24
 233 #define GIC_SH_CONFIG_COUNTBITS_MSK     (MSK(4) << GIC_SH_CONFIG_COUNTBITS_SHF)
 234
 235 #define GIC_SH_CONFIG_NUMINTRS_SHF      16
 236 #define GIC_SH_CONFIG_NUMINTRS_MSK      (MSK(8) << GIC_SH_CONFIG_NUMINTRS_SHF)
 237
 238 #define GIC_SH_CONFIG_NUMVPES_SHF       0
 239 #define GIC_SH_CONFIG_NUMVPES_MSK       (MSK(8) << GIC_SH_CONFIG_NUMVPES_SHF)
 240
 241 #define GIC_SH_WEDGE_SET(intr)          (intr | (0x1 << 31))
 242 #define GIC_SH_WEDGE_CLR(intr)          (intr & ~(0x1 << 31))
 243
 244 #define GIC_MAP_TO_PIN_SHF              31
 245 #define GIC_MAP_TO_PIN_MSK              (MSK(1) << GIC_MAP_TO_PIN_SHF)
 246 #define GIC_MAP_TO_NMI_SHF              30
 247 #define GIC_MAP_TO_NMI_MSK              (MSK(1) << GIC_MAP_TO_NMI_SHF)
 248 #define GIC_MAP_TO_YQ_SHF               29
 249 #define GIC_MAP_TO_YQ_MSK               (MSK(1) << GIC_MAP_TO_YQ_SHF)
 250 #define GIC_MAP_SHF                     0
 251 #define GIC_MAP_MSK                     (MSK(6) << GIC_MAP_SHF)
 252
 253 /* GIC_VPE_CTL Masks */
 254 #define GIC_VPE_CTL_PERFCNT_RTBL_SHF    2
 255 #define GIC_VPE_CTL_PERFCNT_RTBL_MSK    (MSK(1) << GIC_VPE_CTL_PERFCNT_RTBL_SHF)
 256 #define GIC_VPE_CTL_TIMER_RTBL_SHF      1
 257 #define GIC_VPE_CTL_TIMER_RTBL_MSK      (MSK(1) << GIC_VPE_CTL_TIMER_RTBL_SHF)
 258 #define GIC_VPE_CTL_EIC_MODE_SHF        0
 259 #define GIC_VPE_CTL_EIC_MODE_MSK        (MSK(1) << GIC_VPE_CTL_EIC_MODE_SHF)
 260
 261 /* GIC_VPE_PEND Masks */
 262 #define GIC_VPE_PEND_WD_SHF             0
 263 #define GIC_VPE_PEND_WD_MSK             (MSK(1) << GIC_VPE_PEND_WD_SHF)
 264 #define GIC_VPE_PEND_CMP_SHF            1
 265 #define GIC_VPE_PEND_CMP_MSK            (MSK(1) << GIC_VPE_PEND_CMP_SHF)
 266 #define GIC_VPE_PEND_TIMER_SHF          2
 267 #define GIC_VPE_PEND_TIMER_MSK          (MSK(1) << GIC_VPE_PEND_TIMER_SHF)
 268 #define GIC_VPE_PEND_PERFCOUNT_SHF      3
 269 #define GIC_VPE_PEND_PERFCOUNT_MSK      (MSK(1) << GIC_VPE_PEND_PERFCOUNT_SHF)
 270 #define GIC_VPE_PEND_SWINT0_SHF         4
 271 #define GIC_VPE_PEND_SWINT0_MSK         (MSK(1) << GIC_VPE_PEND_SWINT0_SHF)
 272 #define GIC_VPE_PEND_SWINT1_SHF         5
 273 #define GIC_VPE_PEND_SWINT1_MSK         (MSK(1) << GIC_VPE_PEND_SWINT1_SHF)
 274
 275 /* GIC_VPE_RMASK Masks */
 276 #define GIC_VPE_RMASK_WD_SHF            0
 277 #define GIC_VPE_RMASK_WD_MSK            (MSK(1) << GIC_VPE_RMASK_WD_SHF)
 278 #define GIC_VPE_RMASK_CMP_SHF           1
 279 #define GIC_VPE_RMASK_CMP_MSK           (MSK(1) << GIC_VPE_RMASK_CMP_SHF)
 280 #define GIC_VPE_RMASK_TIMER_SHF         2
 281 #define GIC_VPE_RMASK_TIMER_MSK         (MSK(1) << GIC_VPE_RMASK_TIMER_SHF)
 282 #define GIC_VPE_RMASK_PERFCNT_SHF       3
 283 #define GIC_VPE_RMASK_PERFCNT_MSK       (MSK(1) << GIC_VPE_RMASK_PERFCNT_SHF)
 284 #define GIC_VPE_RMASK_SWINT0_SHF        4
 285 #define GIC_VPE_RMASK_SWINT0_MSK        (MSK(1) << GIC_VPE_RMASK_SWINT0_SHF)
 286 #define GIC_VPE_RMASK_SWINT1_SHF        5
 287 #define GIC_VPE_RMASK_SWINT1_MSK        (MSK(1) << GIC_VPE_RMASK_SWINT1_SHF)
 288
 289 /* GIC_VPE_SMASK Masks */
 290 #define GIC_VPE_SMASK_WD_SHF            0
 291 #define GIC_VPE_SMASK_WD_MSK            (MSK(1) << GIC_VPE_SMASK_WD_SHF)
 292 #define GIC_VPE_SMASK_CMP_SHF           1
 293 #define GIC_VPE_SMASK_CMP_MSK           (MSK(1) << GIC_VPE_SMASK_CMP_SHF)
 294 #define GIC_VPE_SMASK_TIMER_SHF         2
 295 #define GIC_VPE_SMASK_TIMER_MSK         (MSK(1) << GIC_VPE_SMASK_TIMER_SHF)
 296 #define GIC_VPE_SMASK_PERFCNT_SHF       3
 297 #define GIC_VPE_SMASK_PERFCNT_MSK       (MSK(1) << GIC_VPE_SMASK_PERFCNT_SHF)
 298 #define GIC_VPE_SMASK_SWINT0_SHF        4
 299 #define GIC_VPE_SMASK_SWINT0_MSK        (MSK(1) << GIC_VPE_SMASK_SWINT0_SHF)
 300 #define GIC_VPE_SMASK_SWINT1_SHF        5
 301 #define GIC_VPE_SMASK_SWINT1_MSK        (MSK(1) << GIC_VPE_SMASK_SWINT1_SHF)
 302
 303 /*
 304  * Set the Mapping of Interrupt X to a VPE.
 305  */
 306 #define GIC_SH_MAP_TO_VPE_SMASK(intr, vpe) \
 307         GICWRITE(GIC_REG_ADDR(SHARED, GIC_SH_MAP_TO_VPE_REG_OFF(intr, vpe)), \
 308                  GIC_SH_MAP_TO_VPE_REG_BIT(vpe))
 309
 310 /*
 311  * Interrupt Meta-data specification. The ipiflag helps
 312  * in building ipi_map.
 313  */
 314 struct gic_intr_map {
 315         unsigned int cpunum;    /* Directed to this CPU */
 316 #define GIC_UNUSED              0xdead                  /* Dummy data */
 317         unsigned int pin;       /* Directed to this Pin */
 318         unsigned int polarity;  /* Polarity : +/-       */
 319         unsigned int trigtype;  /* Trigger  : Edge/Levl */
 320         unsigned int flags;     /* Misc flags   */
 321 #define GIC_FLAG_TRANSPARENT   0x01
 322 };
 323
 324 /*
 325  * This is only used in EIC mode. This helps to figure out which
 326  * shared interrupts we need to process when we get a vector interrupt.
 327  */
 328 #define GIC_MAX_SHARED_INTR  0x5
 329 struct gic_shared_intr_map {
 330         unsigned int num_shared_intr;
 331         unsigned int intr_list[GIC_MAX_SHARED_INTR];
 332         unsigned int local_intr_mask;
 333 };
 334
 335 /* GIC nomenclature for Core Interrupt Pins. */
 336 #define GIC_CPU_INT0            0 /* Core Interrupt 2 */
 337 #define GIC_CPU_INT1            1 /* .                */
 338 #define GIC_CPU_INT2            2 /* .                */
 339 #define GIC_CPU_INT3            3 /* .                */
 340 #define GIC_CPU_INT4            4 /* .                */
 341 #define GIC_CPU_INT5            5 /* Core Interrupt 7 */
 342
 343 /* Local GIC interrupts. */
 344 #define GIC_INT_TMR             (GIC_CPU_INT5)
 345 #define GIC_INT_PERFCTR         (GIC_CPU_INT5)
 346
 347 /* Add 2 to convert non-EIC hardware interrupt to EIC vector number. */
 348 #define GIC_CPU_TO_VEC_OFFSET   (2)
 349
 350 /* Mapped interrupt to pin X, then GIC will generate the vector (X+1). */
 351 #define GIC_PIN_TO_VEC_OFFSET   (1)
 352
 353 #include <linux/clocksource.h>
 354 #include <linux/irq.h>
 355
 356 extern unsigned int gic_present;
 357 extern unsigned int gic_frequency;
 358 extern unsigned long _gic_base;
 359 extern unsigned int gic_irq_base;
 360 extern unsigned int gic_irq_flags[];
 361 extern struct gic_shared_intr_map gic_shared_intr_map[];
 362
 363 extern void gic_init(unsigned long gic_base_addr,
 364         unsigned long gic_addrspace_size, struct gic_intr_map *intrmap,
 365         unsigned int intrmap_size, unsigned int irqbase);
 366 extern void gic_clocksource_init(unsigned int);
 367 extern unsigned int gic_compare_int (void);
 368 extern cycle_t gic_read_count(void);
 369 extern cycle_t gic_read_compare(void);
 370 extern void gic_write_compare(cycle_t cnt);
 371 extern void gic_write_cpu_compare(cycle_t cnt, int cpu);
 372 extern void gic_send_ipi(unsigned int intr);
 373 extern unsigned int plat_ipi_call_int_xlate(unsigned int);
 374 extern unsigned int plat_ipi_resched_int_xlate(unsigned int);
 375 extern void gic_bind_eic_interrupt(int irq, int set);
 376 extern unsigned int gic_get_timer_pending(void);
 377 extern void gic_get_int_mask(unsigned long *dst, const unsigned long *src);
 378 extern unsigned int gic_get_int(void);
 379 extern void gic_enable_interrupt(int irq_vec);
 380 extern void gic_disable_interrupt(int irq_vec);
 381 extern void gic_irq_ack(struct irq_data *d);
 382 extern void gic_finish_irq(struct irq_data *d);
 383 extern void gic_platform_init(int irqs, struct irq_chip *irq_controller);
 384 #endif /* _ASM_GICREGS_H */