gicv3_fdt.c revision 1.2.2.2
1 1.2.2.2 pgoyette /* $NetBSD: gicv3_fdt.c,v 1.2.2.2 2018/09/06 06:55:26 pgoyette Exp $ */ 2 1.2.2.2 pgoyette 3 1.2.2.2 pgoyette /*- 4 1.2.2.2 pgoyette * Copyright (c) 2015-2018 Jared McNeill <jmcneill (at) invisible.ca> 5 1.2.2.2 pgoyette * All rights reserved. 6 1.2.2.2 pgoyette * 7 1.2.2.2 pgoyette * Redistribution and use in source and binary forms, with or without 8 1.2.2.2 pgoyette * modification, are permitted provided that the following conditions 9 1.2.2.2 pgoyette * are met: 10 1.2.2.2 pgoyette * 1. Redistributions of source code must retain the above copyright 11 1.2.2.2 pgoyette * notice, this list of conditions and the following disclaimer. 12 1.2.2.2 pgoyette * 2. Redistributions in binary form must reproduce the above copyright 13 1.2.2.2 pgoyette * notice, this list of conditions and the following disclaimer in the 14 1.2.2.2 pgoyette * documentation and/or other materials provided with the distribution. 15 1.2.2.2 pgoyette * 16 1.2.2.2 pgoyette * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 1.2.2.2 pgoyette * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 1.2.2.2 pgoyette * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 1.2.2.2 pgoyette * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 1.2.2.2 pgoyette * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 1.2.2.2 pgoyette * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 1.2.2.2 pgoyette * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 1.2.2.2 pgoyette * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 1.2.2.2 pgoyette * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.2.2.2 pgoyette * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.2.2.2 pgoyette * SUCH DAMAGE. 27 1.2.2.2 pgoyette */ 28 1.2.2.2 pgoyette 29 1.2.2.2 pgoyette #define _INTR_PRIVATE 30 1.2.2.2 pgoyette 31 1.2.2.2 pgoyette #include <sys/cdefs.h> 32 1.2.2.2 pgoyette __KERNEL_RCSID(0, "$NetBSD: gicv3_fdt.c,v 1.2.2.2 2018/09/06 06:55:26 pgoyette Exp $"); 33 1.2.2.2 pgoyette 34 1.2.2.2 pgoyette #include <sys/param.h> 35 1.2.2.2 pgoyette #include <sys/bus.h> 36 1.2.2.2 pgoyette #include <sys/device.h> 37 1.2.2.2 pgoyette #include <sys/intr.h> 38 1.2.2.2 pgoyette #include <sys/systm.h> 39 1.2.2.2 pgoyette #include <sys/kernel.h> 40 1.2.2.2 pgoyette #include <sys/lwp.h> 41 1.2.2.2 pgoyette #include <sys/kmem.h> 42 1.2.2.2 pgoyette #include <sys/queue.h> 43 1.2.2.2 pgoyette 44 1.2.2.2 pgoyette #include <dev/fdt/fdtvar.h> 45 1.2.2.2 pgoyette 46 1.2.2.2 pgoyette #include <arm/cortex/gicv3.h> 47 1.2.2.2 pgoyette 48 1.2.2.2 pgoyette #define GICV3_MAXIRQ 1020 49 1.2.2.2 pgoyette 50 1.2.2.2 pgoyette #define IRQ_PPI(n) ((n) + 16) 51 1.2.2.2 pgoyette #define IRQ_SPI(n) ((n) + 32) 52 1.2.2.2 pgoyette 53 1.2.2.2 pgoyette struct gicv3_fdt_softc; 54 1.2.2.2 pgoyette struct gicv3_fdt_irq; 55 1.2.2.2 pgoyette 56 1.2.2.2 pgoyette static int gicv3_fdt_match(device_t, cfdata_t, void *); 57 1.2.2.2 pgoyette static void gicv3_fdt_attach(device_t, device_t, void *); 58 1.2.2.2 pgoyette 59 1.2.2.2 pgoyette static int gicv3_fdt_map_registers(struct gicv3_fdt_softc *); 60 1.2.2.2 pgoyette 61 1.2.2.2 pgoyette static int gicv3_fdt_intr(void *); 62 1.2.2.2 pgoyette 63 1.2.2.2 pgoyette static void * gicv3_fdt_establish(device_t, u_int *, int, int, 64 1.2.2.2 pgoyette int (*)(void *), void *); 65 1.2.2.2 pgoyette static void gicv3_fdt_disestablish(device_t, void *); 66 1.2.2.2 pgoyette static bool gicv3_fdt_intrstr(device_t, u_int *, char *, size_t); 67 1.2.2.2 pgoyette 68 1.2.2.2 pgoyette struct fdtbus_interrupt_controller_func gicv3_fdt_funcs = { 69 1.2.2.2 pgoyette .establish = gicv3_fdt_establish, 70 1.2.2.2 pgoyette .disestablish = gicv3_fdt_disestablish, 71 1.2.2.2 pgoyette .intrstr = gicv3_fdt_intrstr 72 1.2.2.2 pgoyette }; 73 1.2.2.2 pgoyette 74 1.2.2.2 pgoyette struct gicv3_fdt_irqhandler { 75 1.2.2.2 pgoyette struct gicv3_fdt_irq *ih_irq; 76 1.2.2.2 pgoyette int (*ih_fn)(void *); 77 1.2.2.2 pgoyette void *ih_arg; 78 1.2.2.2 pgoyette bool ih_mpsafe; 79 1.2.2.2 pgoyette TAILQ_ENTRY(gicv3_fdt_irqhandler) ih_next; 80 1.2.2.2 pgoyette }; 81 1.2.2.2 pgoyette 82 1.2.2.2 pgoyette struct gicv3_fdt_irq { 83 1.2.2.2 pgoyette struct gicv3_fdt_softc *intr_sc; 84 1.2.2.2 pgoyette void *intr_ih; 85 1.2.2.2 pgoyette void *intr_arg; 86 1.2.2.2 pgoyette int intr_refcnt; 87 1.2.2.2 pgoyette int intr_ipl; 88 1.2.2.2 pgoyette int intr_level; 89 1.2.2.2 pgoyette int intr_mpsafe; 90 1.2.2.2 pgoyette TAILQ_HEAD(, gicv3_fdt_irqhandler) intr_handlers; 91 1.2.2.2 pgoyette int intr_irq; 92 1.2.2.2 pgoyette }; 93 1.2.2.2 pgoyette 94 1.2.2.2 pgoyette struct gicv3_fdt_softc { 95 1.2.2.2 pgoyette struct gicv3_softc sc_gic; 96 1.2.2.2 pgoyette int sc_phandle; 97 1.2.2.2 pgoyette 98 1.2.2.2 pgoyette struct gicv3_fdt_irq *sc_irq[GICV3_MAXIRQ]; 99 1.2.2.2 pgoyette }; 100 1.2.2.2 pgoyette 101 1.2.2.2 pgoyette CFATTACH_DECL_NEW(gicv3_fdt, sizeof(struct gicv3_fdt_softc), 102 1.2.2.2 pgoyette gicv3_fdt_match, gicv3_fdt_attach, NULL, NULL); 103 1.2.2.2 pgoyette 104 1.2.2.2 pgoyette static int 105 1.2.2.2 pgoyette gicv3_fdt_match(device_t parent, cfdata_t cf, void *aux) 106 1.2.2.2 pgoyette { 107 1.2.2.2 pgoyette const char * const compatible[] = { 108 1.2.2.2 pgoyette "arm,gic-v3", 109 1.2.2.2 pgoyette NULL 110 1.2.2.2 pgoyette }; 111 1.2.2.2 pgoyette struct fdt_attach_args * const faa = aux; 112 1.2.2.2 pgoyette const int phandle = faa->faa_phandle; 113 1.2.2.2 pgoyette 114 1.2.2.2 pgoyette return of_match_compatible(phandle, compatible); 115 1.2.2.2 pgoyette } 116 1.2.2.2 pgoyette 117 1.2.2.2 pgoyette static void 118 1.2.2.2 pgoyette gicv3_fdt_attach(device_t parent, device_t self, void *aux) 119 1.2.2.2 pgoyette { 120 1.2.2.2 pgoyette struct gicv3_fdt_softc * const sc = device_private(self); 121 1.2.2.2 pgoyette struct fdt_attach_args * const faa = aux; 122 1.2.2.2 pgoyette const int phandle = faa->faa_phandle; 123 1.2.2.2 pgoyette int error; 124 1.2.2.2 pgoyette 125 1.2.2.2 pgoyette error = fdtbus_register_interrupt_controller(self, phandle, 126 1.2.2.2 pgoyette &gicv3_fdt_funcs); 127 1.2.2.2 pgoyette if (error) { 128 1.2.2.2 pgoyette aprint_error(": couldn't register with fdtbus: %d\n", error); 129 1.2.2.2 pgoyette return; 130 1.2.2.2 pgoyette } 131 1.2.2.2 pgoyette 132 1.2.2.2 pgoyette aprint_naive("\n"); 133 1.2.2.2 pgoyette aprint_normal(": GICv3\n"); 134 1.2.2.2 pgoyette 135 1.2.2.2 pgoyette sc->sc_phandle = phandle; 136 1.2.2.2 pgoyette sc->sc_gic.sc_dev = self; 137 1.2.2.2 pgoyette sc->sc_gic.sc_bst = faa->faa_bst; 138 1.2.2.2 pgoyette 139 1.2.2.2 pgoyette error = gicv3_fdt_map_registers(sc); 140 1.2.2.2 pgoyette if (error) { 141 1.2.2.2 pgoyette aprint_error_dev(self, "couldn't map registers\n"); 142 1.2.2.2 pgoyette return; 143 1.2.2.2 pgoyette } 144 1.2.2.2 pgoyette 145 1.2.2.2 pgoyette aprint_debug_dev(self, "%d redistributors\n", sc->sc_gic.sc_bsh_r_count); 146 1.2.2.2 pgoyette 147 1.2.2.2 pgoyette error = gicv3_init(&sc->sc_gic); 148 1.2.2.2 pgoyette if (error) { 149 1.2.2.2 pgoyette aprint_error_dev(self, "failed to initialize GIC: %d\n", error); 150 1.2.2.2 pgoyette return; 151 1.2.2.2 pgoyette } 152 1.2.2.2 pgoyette 153 1.2.2.2 pgoyette arm_fdt_irq_set_handler(gicv3_irq_handler); 154 1.2.2.2 pgoyette } 155 1.2.2.2 pgoyette 156 1.2.2.2 pgoyette static int 157 1.2.2.2 pgoyette gicv3_fdt_map_registers(struct gicv3_fdt_softc *sc) 158 1.2.2.2 pgoyette { 159 1.2.2.2 pgoyette struct gicv3_softc *gic = &sc->sc_gic; 160 1.2.2.2 pgoyette const int phandle = sc->sc_phandle; 161 1.2.2.2 pgoyette u_int redistributor_regions, redistributor_stride; 162 1.2.2.2 pgoyette bus_space_handle_t bsh; 163 1.2.2.2 pgoyette bus_size_t size, region_off; 164 1.2.2.2 pgoyette bus_addr_t addr; 165 1.2.2.2 pgoyette size_t reg_off; 166 1.2.2.2 pgoyette int n, r; 167 1.2.2.2 pgoyette 168 1.2.2.2 pgoyette if (of_getprop_uint32(phandle, "#redistributor-regions", &redistributor_regions)) 169 1.2.2.2 pgoyette redistributor_regions = 1; 170 1.2.2.2 pgoyette if (of_getprop_uint32(phandle, "redistributor-stride", &redistributor_stride)) 171 1.2.2.2 pgoyette redistributor_stride = 0x20000; 172 1.2.2.2 pgoyette 173 1.2.2.2 pgoyette /* 174 1.2.2.2 pgoyette * Map GIC Distributor interface (GICD) 175 1.2.2.2 pgoyette */ 176 1.2.2.2 pgoyette if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 177 1.2.2.2 pgoyette aprint_error_dev(gic->sc_dev, "couldn't get distributor registers\n"); 178 1.2.2.2 pgoyette return ENXIO; 179 1.2.2.2 pgoyette } 180 1.2.2.2 pgoyette if (bus_space_map(sc->sc_gic.sc_bst, addr, size, 0, &sc->sc_gic.sc_bsh_d) != 0) { 181 1.2.2.2 pgoyette aprint_error_dev(gic->sc_dev, "couldn't map distributor registers\n"); 182 1.2.2.2 pgoyette return ENXIO; 183 1.2.2.2 pgoyette } 184 1.2.2.2 pgoyette 185 1.2.2.2 pgoyette /* 186 1.2.2.2 pgoyette * GIC Redistributors (GICR) 187 1.2.2.2 pgoyette */ 188 1.2.2.2 pgoyette for (reg_off = 1, n = 0; n < redistributor_regions; n++, reg_off++) { 189 1.2.2.2 pgoyette if (fdtbus_get_reg(phandle, reg_off, NULL, &size) != 0) { 190 1.2.2.2 pgoyette aprint_error_dev(gic->sc_dev, "couldn't get redistributor registers\n"); 191 1.2.2.2 pgoyette return ENXIO; 192 1.2.2.2 pgoyette } 193 1.2.2.2 pgoyette gic->sc_bsh_r_count += howmany(size, redistributor_stride); 194 1.2.2.2 pgoyette } 195 1.2.2.2 pgoyette gic->sc_bsh_r = kmem_alloc(sizeof(bus_space_handle_t) * gic->sc_bsh_r_count, KM_SLEEP); 196 1.2.2.2 pgoyette for (reg_off = 1, n = 0; n < redistributor_regions; n++, reg_off++) { 197 1.2.2.2 pgoyette if (fdtbus_get_reg(phandle, reg_off, &addr, &size) != 0) { 198 1.2.2.2 pgoyette aprint_error_dev(gic->sc_dev, "couldn't get redistributor registers\n"); 199 1.2.2.2 pgoyette return ENXIO; 200 1.2.2.2 pgoyette } 201 1.2.2.2 pgoyette if (bus_space_map(sc->sc_gic.sc_bst, addr, size, 0, &bsh) != 0) { 202 1.2.2.2 pgoyette aprint_error_dev(gic->sc_dev, "couldn't map redistributor registers\n"); 203 1.2.2.2 pgoyette return ENXIO; 204 1.2.2.2 pgoyette } 205 1.2.2.2 pgoyette const int count = howmany(size, redistributor_stride); 206 1.2.2.2 pgoyette for (r = 0, region_off = 0; r < count; r++, region_off += redistributor_stride) { 207 1.2.2.2 pgoyette if (bus_space_subregion(sc->sc_gic.sc_bst, bsh, region_off, redistributor_stride, &gic->sc_bsh_r[r]) != 0) { 208 1.2.2.2 pgoyette aprint_error_dev(gic->sc_dev, "couldn't subregion redistributor registers\n"); 209 1.2.2.2 pgoyette return ENXIO; 210 1.2.2.2 pgoyette } 211 1.2.2.2 pgoyette } 212 1.2.2.2 pgoyette } 213 1.2.2.2 pgoyette 214 1.2.2.2 pgoyette return 0; 215 1.2.2.2 pgoyette } 216 1.2.2.2 pgoyette 217 1.2.2.2 pgoyette static void * 218 1.2.2.2 pgoyette gicv3_fdt_establish(device_t dev, u_int *specifier, int ipl, int flags, 219 1.2.2.2 pgoyette int (*func)(void *), void *arg) 220 1.2.2.2 pgoyette { 221 1.2.2.2 pgoyette struct gicv3_fdt_softc * const sc = device_private(dev); 222 1.2.2.2 pgoyette struct gicv3_fdt_irq *firq; 223 1.2.2.2 pgoyette struct gicv3_fdt_irqhandler *firqh; 224 1.2.2.2 pgoyette 225 1.2.2.2 pgoyette /* 1st cell is the interrupt type; 0 is SPI, 1 is PPI */ 226 1.2.2.2 pgoyette /* 2nd cell is the interrupt number */ 227 1.2.2.2 pgoyette /* 3rd cell is flags */ 228 1.2.2.2 pgoyette /* 4th cell is affinity */ 229 1.2.2.2 pgoyette 230 1.2.2.2 pgoyette const u_int type = be32toh(specifier[0]); 231 1.2.2.2 pgoyette const u_int intr = be32toh(specifier[1]); 232 1.2.2.2 pgoyette const u_int irq = type == 0 ? IRQ_SPI(intr) : IRQ_PPI(intr); 233 1.2.2.2 pgoyette const u_int trig = be32toh(specifier[2]) & 0xf; 234 1.2.2.2 pgoyette const u_int level = (trig & 0x3) ? IST_EDGE : IST_LEVEL; 235 1.2.2.2 pgoyette 236 1.2.2.2 pgoyette const u_int mpsafe = (flags & FDT_INTR_MPSAFE) ? IST_MPSAFE : 0; 237 1.2.2.2 pgoyette 238 1.2.2.2 pgoyette firq = sc->sc_irq[irq]; 239 1.2.2.2 pgoyette if (firq == NULL) { 240 1.2.2.2 pgoyette firq = kmem_alloc(sizeof(*firq), KM_SLEEP); 241 1.2.2.2 pgoyette firq->intr_sc = sc; 242 1.2.2.2 pgoyette firq->intr_refcnt = 0; 243 1.2.2.2 pgoyette firq->intr_arg = arg; 244 1.2.2.2 pgoyette firq->intr_ipl = ipl; 245 1.2.2.2 pgoyette firq->intr_level = level; 246 1.2.2.2 pgoyette firq->intr_mpsafe = mpsafe; 247 1.2.2.2 pgoyette TAILQ_INIT(&firq->intr_handlers); 248 1.2.2.2 pgoyette firq->intr_irq = irq; 249 1.2.2.2 pgoyette if (arg == NULL) { 250 1.2.2.2 pgoyette firq->intr_ih = intr_establish(irq, ipl, level | mpsafe, 251 1.2.2.2 pgoyette func, NULL); 252 1.2.2.2 pgoyette } else { 253 1.2.2.2 pgoyette firq->intr_ih = intr_establish(irq, ipl, level | mpsafe, 254 1.2.2.2 pgoyette gicv3_fdt_intr, firq); 255 1.2.2.2 pgoyette } 256 1.2.2.2 pgoyette if (firq->intr_ih == NULL) { 257 1.2.2.2 pgoyette kmem_free(firq, sizeof(*firq)); 258 1.2.2.2 pgoyette return NULL; 259 1.2.2.2 pgoyette } 260 1.2.2.2 pgoyette sc->sc_irq[irq] = firq; 261 1.2.2.2 pgoyette } else { 262 1.2.2.2 pgoyette if (firq->intr_arg == NULL && arg != NULL) { 263 1.2.2.2 pgoyette device_printf(dev, "cannot share irq with NULL arg\n"); 264 1.2.2.2 pgoyette return NULL; 265 1.2.2.2 pgoyette } 266 1.2.2.2 pgoyette if (firq->intr_ipl != ipl) { 267 1.2.2.2 pgoyette device_printf(dev, "cannot share irq with different " 268 1.2.2.2 pgoyette "ipl\n"); 269 1.2.2.2 pgoyette return NULL; 270 1.2.2.2 pgoyette } 271 1.2.2.2 pgoyette if (firq->intr_level != level) { 272 1.2.2.2 pgoyette device_printf(dev, "cannot share edge and level " 273 1.2.2.2 pgoyette "interrupts\n"); 274 1.2.2.2 pgoyette return NULL; 275 1.2.2.2 pgoyette } 276 1.2.2.2 pgoyette if (firq->intr_mpsafe != mpsafe) { 277 1.2.2.2 pgoyette device_printf(dev, "cannot share between " 278 1.2.2.2 pgoyette "mpsafe/non-mpsafe\n"); 279 1.2.2.2 pgoyette return NULL; 280 1.2.2.2 pgoyette } 281 1.2.2.2 pgoyette } 282 1.2.2.2 pgoyette 283 1.2.2.2 pgoyette firq->intr_refcnt++; 284 1.2.2.2 pgoyette 285 1.2.2.2 pgoyette firqh = kmem_alloc(sizeof(*firqh), KM_SLEEP); 286 1.2.2.2 pgoyette firqh->ih_mpsafe = (flags & FDT_INTR_MPSAFE) != 0; 287 1.2.2.2 pgoyette firqh->ih_irq = firq; 288 1.2.2.2 pgoyette firqh->ih_fn = func; 289 1.2.2.2 pgoyette firqh->ih_arg = arg; 290 1.2.2.2 pgoyette TAILQ_INSERT_TAIL(&firq->intr_handlers, firqh, ih_next); 291 1.2.2.2 pgoyette 292 1.2.2.2 pgoyette return firq->intr_ih; 293 1.2.2.2 pgoyette } 294 1.2.2.2 pgoyette 295 1.2.2.2 pgoyette static void 296 1.2.2.2 pgoyette gicv3_fdt_disestablish(device_t dev, void *ih) 297 1.2.2.2 pgoyette { 298 1.2.2.2 pgoyette struct gicv3_fdt_softc * const sc = device_private(dev); 299 1.2.2.2 pgoyette struct gicv3_fdt_irqhandler *firqh; 300 1.2.2.2 pgoyette struct gicv3_fdt_irq *firq; 301 1.2.2.2 pgoyette u_int n; 302 1.2.2.2 pgoyette 303 1.2.2.2 pgoyette for (n = 0; n < GICV3_MAXIRQ; n++) { 304 1.2.2.2 pgoyette firq = sc->sc_irq[n]; 305 1.2.2.2 pgoyette if (firq->intr_ih != ih) 306 1.2.2.2 pgoyette continue; 307 1.2.2.2 pgoyette 308 1.2.2.2 pgoyette KASSERT(firq->intr_refcnt > 0); 309 1.2.2.2 pgoyette 310 1.2.2.2 pgoyette if (firq->intr_refcnt > 1) 311 1.2.2.2 pgoyette panic("%s: cannot disestablish shared irq", __func__); 312 1.2.2.2 pgoyette 313 1.2.2.2 pgoyette firqh = TAILQ_FIRST(&firq->intr_handlers); 314 1.2.2.2 pgoyette kmem_free(firqh, sizeof(*firqh)); 315 1.2.2.2 pgoyette intr_disestablish(firq->intr_ih); 316 1.2.2.2 pgoyette kmem_free(firq, sizeof(*firq)); 317 1.2.2.2 pgoyette sc->sc_irq[n] = NULL; 318 1.2.2.2 pgoyette return; 319 1.2.2.2 pgoyette } 320 1.2.2.2 pgoyette 321 1.2.2.2 pgoyette panic("%s: interrupt not established", __func__); 322 1.2.2.2 pgoyette } 323 1.2.2.2 pgoyette 324 1.2.2.2 pgoyette static int 325 1.2.2.2 pgoyette gicv3_fdt_intr(void *priv) 326 1.2.2.2 pgoyette { 327 1.2.2.2 pgoyette struct gicv3_fdt_irq *firq = priv; 328 1.2.2.2 pgoyette struct gicv3_fdt_irqhandler *firqh; 329 1.2.2.2 pgoyette int handled = 0; 330 1.2.2.2 pgoyette 331 1.2.2.2 pgoyette TAILQ_FOREACH(firqh, &firq->intr_handlers, ih_next) 332 1.2.2.2 pgoyette handled += firqh->ih_fn(firqh->ih_arg); 333 1.2.2.2 pgoyette 334 1.2.2.2 pgoyette return handled; 335 1.2.2.2 pgoyette } 336 1.2.2.2 pgoyette 337 1.2.2.2 pgoyette static bool 338 1.2.2.2 pgoyette gicv3_fdt_intrstr(device_t dev, u_int *specifier, char *buf, size_t buflen) 339 1.2.2.2 pgoyette { 340 1.2.2.2 pgoyette /* 1st cell is the interrupt type; 0 is SPI, 1 is PPI */ 341 1.2.2.2 pgoyette /* 2nd cell is the interrupt number */ 342 1.2.2.2 pgoyette /* 3rd cell is flags */ 343 1.2.2.2 pgoyette /* 4th cell is affinity */ 344 1.2.2.2 pgoyette 345 1.2.2.2 pgoyette if (!specifier) 346 1.2.2.2 pgoyette return false; 347 1.2.2.2 pgoyette const u_int type = be32toh(specifier[0]); 348 1.2.2.2 pgoyette const u_int intr = be32toh(specifier[1]); 349 1.2.2.2 pgoyette const u_int irq = type == 0 ? IRQ_SPI(intr) : IRQ_PPI(intr); 350 1.2.2.2 pgoyette 351 1.2.2.2 pgoyette snprintf(buf, buflen, "GICv3 irq %d", irq); 352 1.2.2.2 pgoyette 353 1.2.2.2 pgoyette return true; 354 1.2.2.2 pgoyette } 355
Indexes created Fri Oct 17 23:09:53 GMT 2025