include/linux/irqchip/arm-gic-v3.h

   1 /*
   2  * Copyright (C) 2013, 2014 ARM Limited, All Rights Reserved.
   3  * Author: Marc Zyngier <marc.zyngier@arm.com>
   4  *
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18 #ifndef __LINUX_IRQCHIP_ARM_GIC_V3_H
  19 #define __LINUX_IRQCHIP_ARM_GIC_V3_H
  20
  21 #include <asm/sysreg.h>
  22
  23 /*
  24  * Distributor registers. We assume we're running non-secure, with ARE
  25  * being set. Secure-only and non-ARE registers are not described.
  26  */
  27 #define GICD_CTLR                       0x0000
  28 #define GICD_TYPER                      0x0004
  29 #define GICD_IIDR                       0x0008
  30 #define GICD_STATUSR                    0x0010
  31 #define GICD_SETSPI_NSR                 0x0040
  32 #define GICD_CLRSPI_NSR                 0x0048
  33 #define GICD_SETSPI_SR                  0x0050
  34 #define GICD_CLRSPI_SR                  0x0058
  35 #define GICD_SEIR                       0x0068
  36 #define GICD_IGROUPR                    0x0080
  37 #define GICD_ISENABLER                  0x0100
  38 #define GICD_ICENABLER                  0x0180
  39 #define GICD_ISPENDR                    0x0200
  40 #define GICD_ICPENDR                    0x0280
  41 #define GICD_ISACTIVER                  0x0300
  42 #define GICD_ICACTIVER                  0x0380
  43 #define GICD_IPRIORITYR                 0x0400
  44 #define GICD_ICFGR                      0x0C00
  45 #define GICD_IGRPMODR                   0x0D00
  46 #define GICD_NSACR                      0x0E00
  47 #define GICD_IROUTER                    0x6000
  48 #define GICD_IDREGS                     0xFFD0
  49 #define GICD_PIDR2                      0xFFE8
  50
  51 /*
  52  * Those registers are actually from GICv2, but the spec demands that they
  53  * are implemented as RES0 if ARE is 1 (which we do in KVM's emulated GICv3).
  54  */
  55 #define GICD_ITARGETSR                  0x0800
  56 #define GICD_SGIR                       0x0F00
  57 #define GICD_CPENDSGIR                  0x0F10
  58 #define GICD_SPENDSGIR                  0x0F20
  59
  60 #define GICD_CTLR_RWP                   (1U << 31)
  61 #define GICD_CTLR_DS                    (1U << 6)
  62 #define GICD_CTLR_ARE_NS                (1U << 4)
  63 #define GICD_CTLR_ENABLE_G1A            (1U << 1)
  64 #define GICD_CTLR_ENABLE_G1             (1U << 0)
  65
  66 /*
  67  * In systems with a single security state (what we emulate in KVM)
  68  * the meaning of the interrupt group enable bits is slightly different
  69  */
  70 #define GICD_CTLR_ENABLE_SS_G1          (1U << 1)
  71 #define GICD_CTLR_ENABLE_SS_G0          (1U << 0)
  72
  73 #define GICD_TYPER_LPIS                 (1U << 17)
  74 #define GICD_TYPER_MBIS                 (1U << 16)
  75
  76 #define GICD_TYPER_ID_BITS(typer)       ((((typer) >> 19) & 0x1f) + 1)
  77 #define GICD_TYPER_IRQS(typer)          ((((typer) & 0x1f) + 1) * 32)
  78 #define GICD_TYPER_LPIS                 (1U << 17)
  79
  80 #define GICD_IROUTER_SPI_MODE_ONE       (0U << 31)
  81 #define GICD_IROUTER_SPI_MODE_ANY       (1U << 31)
  82
  83 #define GIC_PIDR2_ARCH_MASK             0xf0
  84 #define GIC_PIDR2_ARCH_GICv3            0x30
  85 #define GIC_PIDR2_ARCH_GICv4            0x40
  86
  87 #define GIC_V3_DIST_SIZE                0x10000
  88
  89 /*
  90  * Re-Distributor registers, offsets from RD_base
  91  */
  92 #define GICR_CTLR                       GICD_CTLR
  93 #define GICR_IIDR                       0x0004
  94 #define GICR_TYPER                      0x0008
  95 #define GICR_STATUSR                    GICD_STATUSR
  96 #define GICR_WAKER                      0x0014
  97 #define GICR_SETLPIR                    0x0040
  98 #define GICR_CLRLPIR                    0x0048
  99 #define GICR_SEIR                       GICD_SEIR
 100 #define GICR_PROPBASER                  0x0070
 101 #define GICR_PENDBASER                  0x0078
 102 #define GICR_INVLPIR                    0x00A0
 103 #define GICR_INVALLR                    0x00B0
 104 #define GICR_SYNCR                      0x00C0
 105 #define GICR_MOVLPIR                    0x0100
 106 #define GICR_MOVALLR                    0x0110
 107 #define GICR_IDREGS                     GICD_IDREGS
 108 #define GICR_PIDR2                      GICD_PIDR2
 109
 110 #define GICR_CTLR_ENABLE_LPIS           (1UL << 0)
 111
 112 #define GICR_TYPER_CPU_NUMBER(r)        (((r) >> 8) & 0xffff)
 113
 114 #define GICR_WAKER_ProcessorSleep       (1U << 1)
 115 #define GICR_WAKER_ChildrenAsleep       (1U << 2)
 116
 117 #define GICR_PROPBASER_NonShareable     (0U << 10)
 118 #define GICR_PROPBASER_InnerShareable   (1U << 10)
 119 #define GICR_PROPBASER_OuterShareable   (2U << 10)
 120 #define GICR_PROPBASER_SHAREABILITY_MASK (3UL << 10)
 121 #define GICR_PROPBASER_nCnB             (0U << 7)
 122 #define GICR_PROPBASER_nC               (1U << 7)
 123 #define GICR_PROPBASER_RaWt             (2U << 7)
 124 #define GICR_PROPBASER_RaWb             (3U << 7)
 125 #define GICR_PROPBASER_WaWt             (4U << 7)
 126 #define GICR_PROPBASER_WaWb             (5U << 7)
 127 #define GICR_PROPBASER_RaWaWt           (6U << 7)
 128 #define GICR_PROPBASER_RaWaWb           (7U << 7)
 129 #define GICR_PROPBASER_IDBITS_MASK      (0x1f)
 130
 131 /*
 132  * Re-Distributor registers, offsets from SGI_base
 133  */
 134 #define GICR_IGROUPR0                   GICD_IGROUPR
 135 #define GICR_ISENABLER0                 GICD_ISENABLER
 136 #define GICR_ICENABLER0                 GICD_ICENABLER
 137 #define GICR_ISPENDR0                   GICD_ISPENDR
 138 #define GICR_ICPENDR0                   GICD_ICPENDR
 139 #define GICR_ISACTIVER0                 GICD_ISACTIVER
 140 #define GICR_ICACTIVER0                 GICD_ICACTIVER
 141 #define GICR_IPRIORITYR0                GICD_IPRIORITYR
 142 #define GICR_ICFGR0                     GICD_ICFGR
 143 #define GICR_IGRPMODR0                  GICD_IGRPMODR
 144 #define GICR_NSACR                      GICD_NSACR
 145
 146 #define GICR_TYPER_PLPIS                (1U << 0)
 147 #define GICR_TYPER_VLPIS                (1U << 1)
 148 #define GICR_TYPER_LAST                 (1U << 4)
 149
 150 #define GIC_V3_REDIST_SIZE              0x20000
 151
 152 #define LPI_PROP_GROUP1                 (1 << 1)
 153 #define LPI_PROP_ENABLED                (1 << 0)
 154
 155 /*
 156  * ITS registers, offsets from ITS_base
 157  */
 158 #define GITS_CTLR                       0x0000
 159 #define GITS_IIDR                       0x0004
 160 #define GITS_TYPER                      0x0008
 161 #define GITS_CBASER                     0x0080
 162 #define GITS_CWRITER                    0x0088
 163 #define GITS_CREADR                     0x0090
 164 #define GITS_BASER                      0x0100
 165 #define GITS_PIDR2                      GICR_PIDR2
 166
 167 #define GITS_TRANSLATER                 0x10040
 168
 169 #define GITS_TYPER_PTA                  (1UL << 19)
 170
 171 #define GITS_CBASER_VALID               (1UL << 63)
 172 #define GITS_CBASER_nCnB                (0UL << 59)
 173 #define GITS_CBASER_nC                  (1UL << 59)
 174 #define GITS_CBASER_RaWt                (2UL << 59)
 175 #define GITS_CBASER_RaWb                (3UL << 59)
 176 #define GITS_CBASER_WaWt                (4UL << 59)
 177 #define GITS_CBASER_WaWb                (5UL << 59)
 178 #define GITS_CBASER_RaWaWt              (6UL << 59)
 179 #define GITS_CBASER_RaWaWb              (7UL << 59)
 180 #define GITS_CBASER_NonShareable        (0UL << 10)
 181 #define GITS_CBASER_InnerShareable      (1UL << 10)
 182 #define GITS_CBASER_OuterShareable      (2UL << 10)
 183 #define GITS_CBASER_SHAREABILITY_MASK   (3UL << 10)
 184
 185 #define GITS_BASER_NR_REGS              8
 186
 187 #define GITS_BASER_VALID                (1UL << 63)
 188 #define GITS_BASER_nCnB                 (0UL << 59)
 189 #define GITS_BASER_nC                   (1UL << 59)
 190 #define GITS_BASER_RaWt                 (2UL << 59)
 191 #define GITS_BASER_RaWb                 (3UL << 59)
 192 #define GITS_BASER_WaWt                 (4UL << 59)
 193 #define GITS_BASER_WaWb                 (5UL << 59)
 194 #define GITS_BASER_RaWaWt               (6UL << 59)
 195 #define GITS_BASER_RaWaWb               (7UL << 59)
 196 #define GITS_BASER_TYPE_SHIFT           (56)
 197 #define GITS_BASER_TYPE(r)              (((r) >> GITS_BASER_TYPE_SHIFT) & 7)
 198 #define GITS_BASER_ENTRY_SIZE_SHIFT     (48)
 199 #define GITS_BASER_ENTRY_SIZE(r)        ((((r) >> GITS_BASER_ENTRY_SIZE_SHIFT) & 0xff) + 1)
 200 #define GITS_BASER_NonShareable         (0UL << 10)
 201 #define GITS_BASER_InnerShareable       (1UL << 10)
 202 #define GITS_BASER_OuterShareable       (2UL << 10)
 203 #define GITS_BASER_SHAREABILITY_SHIFT   (10)
 204 #define GITS_BASER_SHAREABILITY_MASK    (3UL << GITS_BASER_SHAREABILITY_SHIFT)
 205 #define GITS_BASER_PAGE_SIZE_SHIFT      (8)
 206 #define GITS_BASER_PAGE_SIZE_4K         (0UL << GITS_BASER_PAGE_SIZE_SHIFT)
 207 #define GITS_BASER_PAGE_SIZE_16K        (1UL << GITS_BASER_PAGE_SIZE_SHIFT)
 208 #define GITS_BASER_PAGE_SIZE_64K        (2UL << GITS_BASER_PAGE_SIZE_SHIFT)
 209 #define GITS_BASER_PAGE_SIZE_MASK       (3UL << GITS_BASER_PAGE_SIZE_SHIFT)
 210
 211 #define GITS_BASER_TYPE_NONE            0
 212 #define GITS_BASER_TYPE_DEVICE          1
 213 #define GITS_BASER_TYPE_VCPU            2
 214 #define GITS_BASER_TYPE_CPU             3
 215 #define GITS_BASER_TYPE_COLLECTION      4
 216 #define GITS_BASER_TYPE_RESERVED5       5
 217 #define GITS_BASER_TYPE_RESERVED6       6
 218 #define GITS_BASER_TYPE_RESERVED7       7
 219
 220 /*
 221  * ITS commands
 222  */
 223 #define GITS_CMD_MAPD                   0x08
 224 #define GITS_CMD_MAPC                   0x09
 225 #define GITS_CMD_MAPVI                  0x0a
 226 #define GITS_CMD_MOVI                   0x01
 227 #define GITS_CMD_DISCARD                0x0f
 228 #define GITS_CMD_INV                    0x0c
 229 #define GITS_CMD_MOVALL                 0x0e
 230 #define GITS_CMD_INVALL                 0x0d
 231 #define GITS_CMD_INT                    0x03
 232 #define GITS_CMD_CLEAR                  0x04
 233 #define GITS_CMD_SYNC                   0x05
 234
 235 /*
 236  * CPU interface registers
 237  */
 238 #define ICC_CTLR_EL1_EOImode_drop_dir   (0U << 1)
 239 #define ICC_CTLR_EL1_EOImode_drop       (1U << 1)
 240 #define ICC_SRE_EL1_SRE                 (1U << 0)
 241
 242 /*
 243  * Hypervisor interface registers (SRE only)
 244  */
 245 #define ICH_LR_VIRTUAL_ID_MASK          ((1UL << 32) - 1)
 246
 247 #define ICH_LR_EOI                      (1UL << 41)
 248 #define ICH_LR_GROUP                    (1UL << 60)
 249 #define ICH_LR_STATE                    (3UL << 62)
 250 #define ICH_LR_PENDING_BIT              (1UL << 62)
 251 #define ICH_LR_ACTIVE_BIT               (1UL << 63)
 252
 253 #define ICH_MISR_EOI                    (1 << 0)
 254 #define ICH_MISR_U                      (1 << 1)
 255
 256 #define ICH_HCR_EN                      (1 << 0)
 257 #define ICH_HCR_UIE                     (1 << 1)
 258
 259 #define ICH_VMCR_CTLR_SHIFT             0
 260 #define ICH_VMCR_CTLR_MASK              (0x21f << ICH_VMCR_CTLR_SHIFT)
 261 #define ICH_VMCR_BPR1_SHIFT             18
 262 #define ICH_VMCR_BPR1_MASK              (7 << ICH_VMCR_BPR1_SHIFT)
 263 #define ICH_VMCR_BPR0_SHIFT             21
 264 #define ICH_VMCR_BPR0_MASK              (7 << ICH_VMCR_BPR0_SHIFT)
 265 #define ICH_VMCR_PMR_SHIFT              24
 266 #define ICH_VMCR_PMR_MASK               (0xffUL << ICH_VMCR_PMR_SHIFT)
 267
 268 #define ICC_EOIR1_EL1                   sys_reg(3, 0, 12, 12, 1)
 269 #define ICC_IAR1_EL1                    sys_reg(3, 0, 12, 12, 0)
 270 #define ICC_SGI1R_EL1                   sys_reg(3, 0, 12, 11, 5)
 271 #define ICC_PMR_EL1                     sys_reg(3, 0, 4, 6, 0)
 272 #define ICC_CTLR_EL1                    sys_reg(3, 0, 12, 12, 4)
 273 #define ICC_SRE_EL1                     sys_reg(3, 0, 12, 12, 5)
 274 #define ICC_GRPEN1_EL1                  sys_reg(3, 0, 12, 12, 7)
 275
 276 #define ICC_IAR1_EL1_SPURIOUS           0x3ff
 277
 278 #define ICC_SRE_EL2                     sys_reg(3, 4, 12, 9, 5)
 279
 280 #define ICC_SRE_EL2_SRE                 (1 << 0)
 281 #define ICC_SRE_EL2_ENABLE              (1 << 3)
 282
 283 /*
 284  * System register definitions
 285  */
 286 #define ICH_VSEIR_EL2                   sys_reg(3, 4, 12, 9, 4)
 287 #define ICH_HCR_EL2                     sys_reg(3, 4, 12, 11, 0)
 288 #define ICH_VTR_EL2                     sys_reg(3, 4, 12, 11, 1)
 289 #define ICH_MISR_EL2                    sys_reg(3, 4, 12, 11, 2)
 290 #define ICH_EISR_EL2                    sys_reg(3, 4, 12, 11, 3)
 291 #define ICH_ELSR_EL2                    sys_reg(3, 4, 12, 11, 5)
 292 #define ICH_VMCR_EL2                    sys_reg(3, 4, 12, 11, 7)
 293
 294 #define __LR0_EL2(x)                    sys_reg(3, 4, 12, 12, x)
 295 #define __LR8_EL2(x)                    sys_reg(3, 4, 12, 13, x)
 296
 297 #define ICH_LR0_EL2                     __LR0_EL2(0)
 298 #define ICH_LR1_EL2                     __LR0_EL2(1)
 299 #define ICH_LR2_EL2                     __LR0_EL2(2)
 300 #define ICH_LR3_EL2                     __LR0_EL2(3)
 301 #define ICH_LR4_EL2                     __LR0_EL2(4)
 302 #define ICH_LR5_EL2                     __LR0_EL2(5)
 303 #define ICH_LR6_EL2                     __LR0_EL2(6)
 304 #define ICH_LR7_EL2                     __LR0_EL2(7)
 305 #define ICH_LR8_EL2                     __LR8_EL2(0)
 306 #define ICH_LR9_EL2                     __LR8_EL2(1)
 307 #define ICH_LR10_EL2                    __LR8_EL2(2)
 308 #define ICH_LR11_EL2                    __LR8_EL2(3)
 309 #define ICH_LR12_EL2                    __LR8_EL2(4)
 310 #define ICH_LR13_EL2                    __LR8_EL2(5)
 311 #define ICH_LR14_EL2                    __LR8_EL2(6)
 312 #define ICH_LR15_EL2                    __LR8_EL2(7)
 313
 314 #define __AP0Rx_EL2(x)                  sys_reg(3, 4, 12, 8, x)
 315 #define ICH_AP0R0_EL2                   __AP0Rx_EL2(0)
 316 #define ICH_AP0R1_EL2                   __AP0Rx_EL2(1)
 317 #define ICH_AP0R2_EL2                   __AP0Rx_EL2(2)
 318 #define ICH_AP0R3_EL2                   __AP0Rx_EL2(3)
 319
 320 #define __AP1Rx_EL2(x)                  sys_reg(3, 4, 12, 9, x)
 321 #define ICH_AP1R0_EL2                   __AP1Rx_EL2(0)
 322 #define ICH_AP1R1_EL2                   __AP1Rx_EL2(1)
 323 #define ICH_AP1R2_EL2                   __AP1Rx_EL2(2)
 324 #define ICH_AP1R3_EL2                   __AP1Rx_EL2(3)
 325
 326 #ifndef __ASSEMBLY__
 327
 328 #include <linux/stringify.h>
 329
 330 /*
 331  * We need a value to serve as a irq-type for LPIs. Choose one that will
 332  * hopefully pique the interest of the reviewer.
 333  */
 334 #define GIC_IRQ_TYPE_LPI                0xa110c8ed
 335
 336 struct rdists {
 337         struct {
 338                 void __iomem    *rd_base;
 339                 struct page     *pend_page;
 340                 phys_addr_t     phys_base;
 341         } __percpu              *rdist;
 342         struct page             *prop_page;
 343         int                     id_bits;
 344         u64                     flags;
 345 };
 346
 347 static inline void gic_write_eoir(u64 irq)
 348 {
 349         asm volatile("msr_s " __stringify(ICC_EOIR1_EL1) ", %0" : : "r" (irq));
 350         isb();
 351 }
 352
 353 struct irq_domain;
 354 int its_cpu_init(void);
 355 int its_init(struct device_node *node, struct rdists *rdists,
 356              struct irq_domain *domain);
 357
 358 #endif
 359
 360 #endif