arm_fdt.c revision 1.17
1 /* $NetBSD: arm_fdt.c,v 1.17 2021/08/07 16:18:43 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2017 Jared D. McNeill <jmcneill (at) invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include "opt_arm_timer.h" 30 #include "opt_efi.h" 31 #include "opt_modular.h" 32 33 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: arm_fdt.c,v 1.17 2021/08/07 16:18:43 thorpej Exp $"); 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/cpu.h> 39 #include <sys/device.h> 40 #include <sys/kmem.h> 41 #include <sys/bus.h> 42 #include <sys/module.h> 43 44 #include <uvm/uvm_extern.h> 45 46 #include <dev/fdt/fdtvar.h> 47 #include <dev/ofw/openfirm.h> 48 49 #include <arm/fdt/arm_fdtvar.h> 50 51 #ifdef EFI_RUNTIME 52 #include <arm/arm/efi_runtime.h> 53 #include <dev/clock_subr.h> 54 #endif 55 56 static int arm_fdt_match(device_t, cfdata_t, void *); 57 static void arm_fdt_attach(device_t, device_t, void *); 58 59 static void arm_fdt_irq_default_handler(void *); 60 61 #ifdef EFI_RUNTIME 62 static void arm_fdt_efi_init(device_t); 63 static int arm_fdt_efi_rtc_gettime(todr_chip_handle_t, struct clock_ymdhms *); 64 static int arm_fdt_efi_rtc_settime(todr_chip_handle_t, struct clock_ymdhms *); 65 66 static struct todr_chip_handle efi_todr; 67 #endif 68 69 CFATTACH_DECL_NEW(arm_fdt, 0, 70 arm_fdt_match, arm_fdt_attach, NULL, NULL); 71 72 struct arm_fdt_cpu_hatch_cb { 73 TAILQ_ENTRY(arm_fdt_cpu_hatch_cb) next; 74 void (*cb)(void *, struct cpu_info *); 75 void *priv; 76 }; 77 78 static TAILQ_HEAD(, arm_fdt_cpu_hatch_cb) arm_fdt_cpu_hatch_cbs = 79 TAILQ_HEAD_INITIALIZER(arm_fdt_cpu_hatch_cbs); 80 81 static void (*_arm_fdt_irq_handler)(void *) = arm_fdt_irq_default_handler; 82 static void (*_arm_fdt_timer_init)(void) = NULL; 83 84 int 85 arm_fdt_match(device_t parent, cfdata_t cf, void *aux) 86 { 87 return 1; 88 } 89 90 void 91 arm_fdt_attach(device_t parent, device_t self, void *aux) 92 { 93 const struct arm_platform *plat = arm_fdt_platform(); 94 struct fdt_attach_args faa; 95 96 aprint_naive("\n"); 97 aprint_normal("\n"); 98 99 #ifdef EFI_RUNTIME 100 arm_fdt_efi_init(self); 101 #endif 102 103 plat->ap_init_attach_args(&faa); 104 faa.faa_name = ""; 105 faa.faa_phandle = OF_peer(0); 106 107 config_found(self, &faa, NULL, CFARGS_NONE); 108 } 109 110 const struct arm_platform * 111 arm_fdt_platform(void) 112 { 113 static const struct arm_platform_info *booted_platform = NULL; 114 __link_set_decl(arm_platforms, struct arm_platform_info); 115 struct arm_platform_info * const *info; 116 117 if (booted_platform == NULL) { 118 const struct arm_platform_info *best_info = NULL; 119 const int phandle = OF_peer(0); 120 int match, best_match = 0; 121 122 __link_set_foreach(info, arm_platforms) { 123 const struct device_compatible_entry compat_data[] = { 124 { .compat = (*info)->api_compat }, 125 DEVICE_COMPAT_EOL 126 }; 127 128 match = of_compatible_match(phandle, compat_data); 129 if (match > best_match) { 130 best_match = match; 131 best_info = *info; 132 } 133 } 134 135 booted_platform = best_info; 136 } 137 138 /* 139 * No SoC specific platform was found. Try to find a generic 140 * platform definition and use that if available. 141 */ 142 if (booted_platform == NULL) { 143 __link_set_foreach(info, arm_platforms) { 144 if (strcmp((*info)->api_compat, ARM_PLATFORM_DEFAULT) == 0) { 145 booted_platform = *info; 146 break; 147 } 148 } 149 } 150 151 return booted_platform == NULL ? NULL : booted_platform->api_ops; 152 } 153 154 void 155 arm_fdt_cpu_hatch_register(void *priv, void (*cb)(void *, struct cpu_info *)) 156 { 157 struct arm_fdt_cpu_hatch_cb *c; 158 159 c = kmem_alloc(sizeof(*c), KM_SLEEP); 160 c->priv = priv; 161 c->cb = cb; 162 TAILQ_INSERT_TAIL(&arm_fdt_cpu_hatch_cbs, c, next); 163 } 164 165 void 166 arm_fdt_cpu_hatch(struct cpu_info *ci) 167 { 168 struct arm_fdt_cpu_hatch_cb *c; 169 170 TAILQ_FOREACH(c, &arm_fdt_cpu_hatch_cbs, next) 171 c->cb(c->priv, ci); 172 } 173 174 static void 175 arm_fdt_irq_default_handler(void *frame) 176 { 177 panic("missing interrupt controller driver"); 178 } 179 180 void 181 arm_fdt_irq_set_handler(void (*irq_handler)(void *)) 182 { 183 KASSERT(_arm_fdt_irq_handler == arm_fdt_irq_default_handler); 184 _arm_fdt_irq_handler = irq_handler; 185 } 186 187 void 188 arm_fdt_irq_handler(void *tf) 189 { 190 _arm_fdt_irq_handler(tf); 191 } 192 193 void 194 arm_fdt_timer_register(void (*timerfn)(void)) 195 { 196 if (_arm_fdt_timer_init != NULL) { 197 #ifdef DIAGNOSTIC 198 aprint_verbose("%s: timer already registered\n", __func__); 199 #endif 200 return; 201 } 202 _arm_fdt_timer_init = timerfn; 203 } 204 205 void 206 arm_fdt_memory_dump(paddr_t pa) 207 { 208 const struct arm_platform *plat = arm_fdt_platform(); 209 struct fdt_attach_args faa; 210 bus_space_tag_t bst; 211 bus_space_handle_t bsh; 212 213 plat->ap_init_attach_args(&faa); 214 215 bst = faa.faa_bst; 216 bus_space_map(bst, pa, 0x100, 0, &bsh); 217 218 for (int i = 0; i < 0x100; i += 0x10) { 219 printf("%" PRIxPTR ": %08x %08x %08x %08x\n", 220 (uintptr_t)(pa + i), 221 bus_space_read_4(bst, bsh, i + 0), 222 bus_space_read_4(bst, bsh, i + 4), 223 bus_space_read_4(bst, bsh, i + 8), 224 bus_space_read_4(bst, bsh, i + 12)); 225 } 226 } 227 228 #ifdef __HAVE_GENERIC_CPU_INITCLOCKS 229 void 230 cpu_initclocks(void) 231 { 232 if (_arm_fdt_timer_init == NULL) 233 panic("cpu_initclocks: no timer registered"); 234 _arm_fdt_timer_init(); 235 } 236 #endif 237 238 void 239 arm_fdt_module_init(void) 240 { 241 #ifdef MODULAR 242 const int chosen = OF_finddevice("/chosen"); 243 const char *module_name; 244 const uint64_t *data; 245 u_int index; 246 paddr_t pa; 247 vaddr_t va; 248 int len; 249 250 if (chosen == -1) 251 return; 252 253 data = fdtbus_get_prop(chosen, "netbsd,modules", &len); 254 if (data == NULL) 255 return; 256 257 for (index = 0; index < len / 16; index++, data += 2) { 258 module_name = fdtbus_get_string_index(chosen, 259 "netbsd,module-names", index); 260 if (module_name == NULL) 261 break; 262 263 const paddr_t startpa = (paddr_t)be64dec(data + 0); 264 const size_t size = (size_t)be64dec(data + 1); 265 const paddr_t endpa = round_page(startpa + size); 266 267 const vaddr_t startva = uvm_km_alloc(kernel_map, endpa - startpa, 268 0, UVM_KMF_VAONLY | UVM_KMF_NOWAIT); 269 if (startva == 0) { 270 printf("ERROR: Cannot allocate VA for module %s\n", 271 module_name); 272 continue; 273 } 274 275 for (pa = startpa, va = startva; 276 pa < endpa; 277 pa += PAGE_SIZE, va += PAGE_SIZE) { 278 pmap_kenter_pa(va, pa, VM_PROT_ALL, 0); 279 } 280 pmap_update(pmap_kernel()); 281 282 module_prime(module_name, (void *)(uintptr_t)startva, size); 283 } 284 #endif /* !MODULAR */ 285 } 286 287 #ifdef EFI_RUNTIME 288 static void 289 arm_fdt_efi_init(device_t dev) 290 { 291 uint64_t efi_system_table; 292 struct efi_tm tm; 293 int error; 294 295 const int chosen = OF_finddevice("/chosen"); 296 if (chosen < 0) 297 return; 298 299 if (of_getprop_uint64(chosen, "netbsd,uefi-system-table", &efi_system_table) != 0) 300 return; 301 302 error = arm_efirt_init(efi_system_table); 303 if (error) 304 return; 305 306 aprint_debug_dev(dev, "EFI system table at %#" PRIx64 "\n", efi_system_table); 307 308 if (arm_efirt_gettime(&tm) == 0) { 309 aprint_normal_dev(dev, "using EFI runtime services for RTC\n"); 310 efi_todr.cookie = NULL; 311 efi_todr.todr_gettime_ymdhms = arm_fdt_efi_rtc_gettime; 312 efi_todr.todr_settime_ymdhms = arm_fdt_efi_rtc_settime; 313 todr_attach(&efi_todr); 314 } 315 } 316 317 static int 318 arm_fdt_efi_rtc_gettime(todr_chip_handle_t tch, struct clock_ymdhms *dt) 319 { 320 struct efi_tm tm; 321 int error; 322 323 error = arm_efirt_gettime(&tm); 324 if (error) 325 return error; 326 327 dt->dt_year = tm.tm_year; 328 dt->dt_mon = tm.tm_mon; 329 dt->dt_day = tm.tm_mday; 330 dt->dt_wday = 0; 331 dt->dt_hour = tm.tm_hour; 332 dt->dt_min = tm.tm_min; 333 dt->dt_sec = tm.tm_sec; 334 335 return 0; 336 } 337 338 static int 339 arm_fdt_efi_rtc_settime(todr_chip_handle_t tch, struct clock_ymdhms *dt) 340 { 341 struct efi_tm tm; 342 343 memset(&tm, 0, sizeof(tm)); 344 tm.tm_year = dt->dt_year; 345 tm.tm_mon = dt->dt_mon; 346 tm.tm_mday = dt->dt_day; 347 tm.tm_hour = dt->dt_hour; 348 tm.tm_min = dt->dt_min; 349 tm.tm_sec = dt->dt_sec; 350 351 return arm_efirt_settime(&tm); 352 } 353 #endif 354
Indexes created Fri Sep 26 08:10:20 GMT 2025