1 /* 2 * ARM GICv3 support - internal interfaces 3 * 4 * Copyright (c) 2012 Linaro Limited 5 * Copyright (c) 2015 Huawei. 6 * Copyright (c) 2015 Samsung Electronics Co., Ltd. 7 * Written by Peter Maydell 8 * Reworked for GICv3 by Shlomo Pongratz and Pavel Fedin 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation, either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License along 21 * with this program; if not, see <http://www.gnu.org/licenses/>. 22 */ 23 24 #ifndef QEMU_ARM_GICV3_INTERNAL_H 25 #define QEMU_ARM_GICV3_INTERNAL_H 26 27 #include "hw/intc/arm_gicv3_common.h" 28 29 /* Distributor registers, as offsets from the distributor base address */ 30 #define GICD_CTLR 0x0000 31 #define GICD_TYPER 0x0004 32 #define GICD_IIDR 0x0008 33 #define GICD_STATUSR 0x0010 34 #define GICD_SETSPI_NSR 0x0040 35 #define GICD_CLRSPI_NSR 0x0048 36 #define GICD_SETSPI_SR 0x0050 37 #define GICD_CLRSPI_SR 0x0058 38 #define GICD_SEIR 0x0068 39 #define GICD_IGROUPR 0x0080 40 #define GICD_ISENABLER 0x0100 41 #define GICD_ICENABLER 0x0180 42 #define GICD_ISPENDR 0x0200 43 #define GICD_ICPENDR 0x0280 44 #define GICD_ISACTIVER 0x0300 45 #define GICD_ICACTIVER 0x0380 46 #define GICD_IPRIORITYR 0x0400 47 #define GICD_ITARGETSR 0x0800 48 #define GICD_ICFGR 0x0C00 49 #define GICD_IGRPMODR 0x0D00 50 #define GICD_NSACR 0x0E00 51 #define GICD_SGIR 0x0F00 52 #define GICD_CPENDSGIR 0x0F10 53 #define GICD_SPENDSGIR 0x0F20 54 #define GICD_IROUTER 0x6000 55 #define GICD_IDREGS 0xFFD0 56 57 /* GICD_CTLR fields */ 58 #define GICD_CTLR_EN_GRP0 (1U << 0) 59 #define GICD_CTLR_EN_GRP1NS (1U << 1) /* GICv3 5.3.20 */ 60 #define GICD_CTLR_EN_GRP1S (1U << 2) 61 #define GICD_CTLR_EN_GRP1_ALL (GICD_CTLR_EN_GRP1NS | GICD_CTLR_EN_GRP1S) 62 /* Bit 4 is ARE if the system doesn't support TrustZone, ARE_S otherwise */ 63 #define GICD_CTLR_ARE (1U << 4) 64 #define GICD_CTLR_ARE_S (1U << 4) 65 #define GICD_CTLR_ARE_NS (1U << 5) 66 #define GICD_CTLR_DS (1U << 6) 67 #define GICD_CTLR_E1NWF (1U << 7) 68 #define GICD_CTLR_RWP (1U << 31) 69 70 /* 71 * Redistributor frame offsets from RD_base 72 */ 73 #define GICR_SGI_OFFSET 0x10000 74 75 /* 76 * Redistributor registers, offsets from RD_base 77 */ 78 #define GICR_CTLR 0x0000 79 #define GICR_IIDR 0x0004 80 #define GICR_TYPER 0x0008 81 #define GICR_STATUSR 0x0010 82 #define GICR_WAKER 0x0014 83 #define GICR_SETLPIR 0x0040 84 #define GICR_CLRLPIR 0x0048 85 #define GICR_PROPBASER 0x0070 86 #define GICR_PENDBASER 0x0078 87 #define GICR_INVLPIR 0x00A0 88 #define GICR_INVALLR 0x00B0 89 #define GICR_SYNCR 0x00C0 90 #define GICR_IDREGS 0xFFD0 91 92 /* SGI and PPI Redistributor registers, offsets from RD_base */ 93 #define GICR_IGROUPR0 (GICR_SGI_OFFSET + 0x0080) 94 #define GICR_ISENABLER0 (GICR_SGI_OFFSET + 0x0100) 95 #define GICR_ICENABLER0 (GICR_SGI_OFFSET + 0x0180) 96 #define GICR_ISPENDR0 (GICR_SGI_OFFSET + 0x0200) 97 #define GICR_ICPENDR0 (GICR_SGI_OFFSET + 0x0280) 98 #define GICR_ISACTIVER0 (GICR_SGI_OFFSET + 0x0300) 99 #define GICR_ICACTIVER0 (GICR_SGI_OFFSET + 0x0380) 100 #define GICR_IPRIORITYR (GICR_SGI_OFFSET + 0x0400) 101 #define GICR_ICFGR0 (GICR_SGI_OFFSET + 0x0C00) 102 #define GICR_ICFGR1 (GICR_SGI_OFFSET + 0x0C04) 103 #define GICR_IGRPMODR0 (GICR_SGI_OFFSET + 0x0D00) 104 #define GICR_NSACR (GICR_SGI_OFFSET + 0x0E00) 105 106 #define GICR_CTLR_ENABLE_LPIS (1U << 0) 107 #define GICR_CTLR_RWP (1U << 3) 108 #define GICR_CTLR_DPG0 (1U << 24) 109 #define GICR_CTLR_DPG1NS (1U << 25) 110 #define GICR_CTLR_DPG1S (1U << 26) 111 #define GICR_CTLR_UWP (1U << 31) 112 113 #define GICR_TYPER_PLPIS (1U << 0) 114 #define GICR_TYPER_VLPIS (1U << 1) 115 #define GICR_TYPER_DIRECTLPI (1U << 3) 116 #define GICR_TYPER_LAST (1U << 4) 117 #define GICR_TYPER_DPGS (1U << 5) 118 #define GICR_TYPER_PROCNUM (0xFFFFU << 8) 119 #define GICR_TYPER_COMMONLPIAFF (0x3 << 24) 120 #define GICR_TYPER_AFFINITYVALUE (0xFFFFFFFFULL << 32) 121 122 #define GICR_WAKER_ProcessorSleep (1U << 1) 123 #define GICR_WAKER_ChildrenAsleep (1U << 2) 124 125 #define GICR_PROPBASER_OUTER_CACHEABILITY_MASK (7ULL << 56) 126 #define GICR_PROPBASER_ADDR_MASK (0xfffffffffULL << 12) 127 #define GICR_PROPBASER_SHAREABILITY_MASK (3U << 10) 128 #define GICR_PROPBASER_CACHEABILITY_MASK (7U << 7) 129 #define GICR_PROPBASER_IDBITS_MASK (0x1f) 130 131 #define GICR_PENDBASER_PTZ (1ULL << 62) 132 #define GICR_PENDBASER_OUTER_CACHEABILITY_MASK (7ULL << 56) 133 #define GICR_PENDBASER_ADDR_MASK (0xffffffffULL << 16) 134 #define GICR_PENDBASER_SHAREABILITY_MASK (3U << 10) 135 #define GICR_PENDBASER_CACHEABILITY_MASK (7U << 7) 136 137 #define ICC_CTLR_EL1_CBPR (1U << 0) 138 #define ICC_CTLR_EL1_EOIMODE (1U << 1) 139 #define ICC_CTLR_EL1_PMHE (1U << 6) 140 #define ICC_CTLR_EL1_PRIBITS_SHIFT 8 141 #define ICC_CTLR_EL1_IDBITS_SHIFT 11 142 #define ICC_CTLR_EL1_SEIS (1U << 14) 143 #define ICC_CTLR_EL1_A3V (1U << 15) 144 145 #define ICC_PMR_PRIORITY_MASK 0xff 146 #define ICC_BPR_BINARYPOINT_MASK 0x07 147 #define ICC_IGRPEN_ENABLE 0x01 148 149 #define ICC_CTLR_EL3_CBPR_EL1S (1U << 0) 150 #define ICC_CTLR_EL3_CBPR_EL1NS (1U << 1) 151 #define ICC_CTLR_EL3_EOIMODE_EL3 (1U << 2) 152 #define ICC_CTLR_EL3_EOIMODE_EL1S (1U << 3) 153 #define ICC_CTLR_EL3_EOIMODE_EL1NS (1U << 4) 154 #define ICC_CTLR_EL3_RM (1U << 5) 155 #define ICC_CTLR_EL3_PMHE (1U << 6) 156 #define ICC_CTLR_EL3_PRIBITS_SHIFT 8 157 #define ICC_CTLR_EL3_IDBITS_SHIFT 11 158 #define ICC_CTLR_EL3_SEIS (1U << 14) 159 #define ICC_CTLR_EL3_A3V (1U << 15) 160 #define ICC_CTLR_EL3_NDS (1U << 17) 161 162 /* Special interrupt IDs */ 163 #define INTID_SECURE 1020 164 #define INTID_NONSECURE 1021 165 #define INTID_SPURIOUS 1023 166 167 /* Functions internal to the emulated GICv3 */ 168 169 /** 170 * gicv3_redist_update: 171 * @cs: GICv3CPUState for this redistributor 172 * 173 * Recalculate the highest priority pending interrupt after a 174 * change to redistributor state, and inform the CPU accordingly. 175 */ 176 void gicv3_redist_update(GICv3CPUState *cs); 177 178 /** 179 * gicv3_update: 180 * @s: GICv3State 181 * @start: first interrupt whose state changed 182 * @len: length of the range of interrupts whose state changed 183 * 184 * Recalculate the highest priority pending interrupts after a 185 * change to the distributor state affecting @len interrupts 186 * starting at @start, and inform the CPUs accordingly. 187 */ 188 void gicv3_update(GICv3State *s, int start, int len); 189 190 /** 191 * gicv3_full_update_noirqset: 192 * @s: GICv3State 193 * 194 * Recalculate the cached information about highest priority 195 * pending interrupts, but don't inform the CPUs. This should be 196 * called after an incoming migration has loaded new state. 197 */ 198 void gicv3_full_update_noirqset(GICv3State *s); 199 200 /** 201 * gicv3_full_update: 202 * @s: GICv3State 203 * 204 * Recalculate the highest priority pending interrupts after 205 * a change that could affect the status of all interrupts, 206 * and inform the CPUs accordingly. 207 */ 208 void gicv3_full_update(GICv3State *s); 209 MemTxResult gicv3_dist_read(void *opaque, hwaddr offset, uint64_t *data, 210 unsigned size, MemTxAttrs attrs); 211 MemTxResult gicv3_dist_write(void *opaque, hwaddr addr, uint64_t data, 212 unsigned size, MemTxAttrs attrs); 213 MemTxResult gicv3_redist_read(void *opaque, hwaddr offset, uint64_t *data, 214 unsigned size, MemTxAttrs attrs); 215 MemTxResult gicv3_redist_write(void *opaque, hwaddr offset, uint64_t data, 216 unsigned size, MemTxAttrs attrs); 217 void gicv3_dist_set_irq(GICv3State *s, int irq, int level); 218 void gicv3_redist_set_irq(GICv3CPUState *cs, int irq, int level); 219 void gicv3_redist_send_sgi(GICv3CPUState *cs, int grp, int irq, bool ns); 220 void gicv3_init_cpuif(GICv3State *s); 221 222 /** 223 * gicv3_cpuif_update: 224 * @cs: GICv3CPUState for the CPU to update 225 * 226 * Recalculate whether to assert the IRQ or FIQ lines after a change 227 * to the current highest priority pending interrupt, the CPU's 228 * current running priority or the CPU's current exception level or 229 * security state. 230 */ 231 void gicv3_cpuif_update(GICv3CPUState *cs); 232 233 static inline uint32_t gicv3_iidr(void) 234 { 235 /* Return the Implementer Identification Register value 236 * for the emulated GICv3, as reported in GICD_IIDR and GICR_IIDR. 237 * 238 * We claim to be an ARM r0p0 with a zero ProductID. 239 * This is the same as an r0p0 GIC-500. 240 */ 241 return 0x43b; 242 } 243 244 static inline uint32_t gicv3_idreg(int regoffset) 245 { 246 /* Return the value of the CoreSight ID register at the specified 247 * offset from the first ID register (as found in the distributor 248 * and redistributor register banks). 249 * These values indicate an ARM implementation of a GICv3. 250 */ 251 static const uint8_t gicd_ids[] = { 252 0x44, 0x00, 0x00, 0x00, 0x92, 0xB4, 0x3B, 0x00, 0x0D, 0xF0, 0x05, 0xB1 253 }; 254 return gicd_ids[regoffset / 4]; 255 } 256 257 /** 258 * gicv3_irq_group: 259 * 260 * Return the group which this interrupt is configured as (GICV3_G0, 261 * GICV3_G1 or GICV3_G1NS). 262 */ 263 static inline int gicv3_irq_group(GICv3State *s, GICv3CPUState *cs, int irq) 264 { 265 bool grpbit, grpmodbit; 266 267 if (irq < GIC_INTERNAL) { 268 grpbit = extract32(cs->gicr_igroupr0, irq, 1); 269 grpmodbit = extract32(cs->gicr_igrpmodr0, irq, 1); 270 } else { 271 grpbit = gicv3_gicd_group_test(s, irq); 272 grpmodbit = gicv3_gicd_grpmod_test(s, irq); 273 } 274 if (grpbit) { 275 return GICV3_G1NS; 276 } 277 if (s->gicd_ctlr & GICD_CTLR_DS) { 278 return GICV3_G0; 279 } 280 return grpmodbit ? GICV3_G1 : GICV3_G0; 281 } 282 283 /** 284 * gicv3_redist_affid: 285 * 286 * Return the 32-bit affinity ID of the CPU connected to this redistributor 287 */ 288 static inline uint32_t gicv3_redist_affid(GICv3CPUState *cs) 289 { 290 return cs->gicr_typer >> 32; 291 } 292 293 /** 294 * gicv3_cache_target_cpustate: 295 * 296 * Update the cached CPU state corresponding to the target for this interrupt 297 * (which is kept in s->gicd_irouter_target[]). 298 */ 299 static inline void gicv3_cache_target_cpustate(GICv3State *s, int irq) 300 { 301 GICv3CPUState *cs = NULL; 302 int i; 303 uint32_t tgtaff = extract64(s->gicd_irouter[irq], 0, 24) | 304 extract64(s->gicd_irouter[irq], 32, 8) << 24; 305 306 for (i = 0; i < s->num_cpu; i++) { 307 if (s->cpu[i].gicr_typer >> 32 == tgtaff) { 308 cs = &s->cpu[i]; 309 break; 310 } 311 } 312 313 s->gicd_irouter_target[irq] = cs; 314 } 315 316 /** 317 * gicv3_cache_all_target_cpustates: 318 * 319 * Populate the entire cache of CPU state pointers for interrupt targets 320 * (eg after inbound migration or CPU reset) 321 */ 322 static inline void gicv3_cache_all_target_cpustates(GICv3State *s) 323 { 324 int irq; 325 326 for (irq = GIC_INTERNAL; irq < GICV3_MAXIRQ; irq++) { 327 gicv3_cache_target_cpustate(s, irq); 328 } 329 } 330 331 #endif /* !QEMU_ARM_GIC_INTERNAL_H */ 332