arm_fdt.c revision 1.14
1 /* $NetBSD: arm_fdt.c,v 1.14 2021/01/27 03:10:19 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 1.14 2021/01/27 03:10:19 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 #ifdef EFI_RUNTIME 60 static void arm_fdt_efi_init(device_t); 61 static int arm_fdt_efi_rtc_gettime(todr_chip_handle_t, struct clock_ymdhms *); 62 static int arm_fdt_efi_rtc_settime(todr_chip_handle_t, struct clock_ymdhms *); 63 64 static struct todr_chip_handle efi_todr; 65 #endif 66 67 CFATTACH_DECL_NEW(arm_fdt, 0, 68 arm_fdt_match, arm_fdt_attach, NULL, NULL); 69 70 struct arm_fdt_cpu_hatch_cb { 71 TAILQ_ENTRY(arm_fdt_cpu_hatch_cb) next; 72 void (*cb)(void *, struct cpu_info *); 73 void *priv; 74 }; 75 76 static TAILQ_HEAD(, arm_fdt_cpu_hatch_cb) arm_fdt_cpu_hatch_cbs = 77 TAILQ_HEAD_INITIALIZER(arm_fdt_cpu_hatch_cbs); 78 79 static void (*_arm_fdt_irq_handler)(void *) = NULL; 80 static void (*_arm_fdt_timer_init)(void) = NULL; 81 82 int 83 arm_fdt_match(device_t parent, cfdata_t cf, void *aux) 84 { 85 return 1; 86 } 87 88 void 89 arm_fdt_attach(device_t parent, device_t self, void *aux) 90 { 91 const struct arm_platform *plat = arm_fdt_platform(); 92 struct fdt_attach_args faa; 93 94 aprint_naive("\n"); 95 aprint_normal("\n"); 96 97 #ifdef EFI_RUNTIME 98 arm_fdt_efi_init(self); 99 #endif 100 101 plat->ap_init_attach_args(&faa); 102 faa.faa_name = ""; 103 faa.faa_phandle = OF_peer(0); 104 105 config_found(self, &faa, NULL); 106 } 107 108 const struct arm_platform * 109 arm_fdt_platform(void) 110 { 111 static const struct arm_platform_info *booted_platform = NULL; 112 __link_set_decl(arm_platforms, struct arm_platform_info); 113 struct arm_platform_info * const *info; 114 115 if (booted_platform == NULL) { 116 const struct arm_platform_info *best_info = NULL; 117 const int phandle = OF_peer(0); 118 int match, best_match = 0; 119 120 __link_set_foreach(info, arm_platforms) { 121 const struct device_compatible_entry compat_data[] = { 122 { .compat = (*info)->api_compat }, 123 DEVICE_COMPAT_EOL 124 }; 125 126 match = of_compatible_match(phandle, compat_data); 127 if (match > best_match) { 128 best_match = match; 129 best_info = *info; 130 } 131 } 132 133 booted_platform = best_info; 134 } 135 136 /* 137 * No SoC specific platform was found. Try to find a generic 138 * platform definition and use that if available. 139 */ 140 if (booted_platform == NULL) { 141 __link_set_foreach(info, arm_platforms) { 142 if (strcmp((*info)->api_compat, ARM_PLATFORM_DEFAULT) == 0) { 143 booted_platform = *info; 144 break; 145 } 146 } 147 } 148 149 return booted_platform == NULL ? NULL : booted_platform->api_ops; 150 } 151 152 void 153 arm_fdt_cpu_hatch_register(void *priv, void (*cb)(void *, struct cpu_info *)) 154 { 155 struct arm_fdt_cpu_hatch_cb *c; 156 157 c = kmem_alloc(sizeof(*c), KM_SLEEP); 158 c->priv = priv; 159 c->cb = cb; 160 TAILQ_INSERT_TAIL(&arm_fdt_cpu_hatch_cbs, c, next); 161 } 162 163 void 164 arm_fdt_cpu_hatch(struct cpu_info *ci) 165 { 166 struct arm_fdt_cpu_hatch_cb *c; 167 168 TAILQ_FOREACH(c, &arm_fdt_cpu_hatch_cbs, next) 169 c->cb(c->priv, ci); 170 } 171 172 void 173 arm_fdt_irq_set_handler(void (*irq_handler)(void *)) 174 { 175 KASSERT(_arm_fdt_irq_handler == NULL); 176 _arm_fdt_irq_handler = irq_handler; 177 } 178 179 void 180 arm_fdt_irq_handler(void *tf) 181 { 182 _arm_fdt_irq_handler(tf); 183 } 184 185 void 186 arm_fdt_timer_register(void (*timerfn)(void)) 187 { 188 if (_arm_fdt_timer_init != NULL) { 189 #ifdef DIAGNOSTIC 190 aprint_verbose("%s: timer already registered\n", __func__); 191 #endif 192 return; 193 } 194 _arm_fdt_timer_init = timerfn; 195 } 196 197 void 198 arm_fdt_memory_dump(paddr_t pa) 199 { 200 const struct arm_platform *plat = arm_fdt_platform(); 201 struct fdt_attach_args faa; 202 bus_space_tag_t bst; 203 bus_space_handle_t bsh; 204 205 plat->ap_init_attach_args(&faa); 206 207 bst = faa.faa_bst; 208 bus_space_map(bst, pa, 0x100, 0, &bsh); 209 210 for (int i = 0; i < 0x100; i += 0x10) { 211 printf("%" PRIxPTR ": %08x %08x %08x %08x\n", 212 (uintptr_t)(pa + i), 213 bus_space_read_4(bst, bsh, i + 0), 214 bus_space_read_4(bst, bsh, i + 4), 215 bus_space_read_4(bst, bsh, i + 8), 216 bus_space_read_4(bst, bsh, i + 12)); 217 } 218 } 219 220 #ifdef __HAVE_GENERIC_CPU_INITCLOCKS 221 void 222 cpu_initclocks(void) 223 { 224 if (_arm_fdt_timer_init == NULL) 225 panic("cpu_initclocks: no timer registered"); 226 _arm_fdt_timer_init(); 227 } 228 #endif 229 230 void 231 arm_fdt_module_init(void) 232 { 233 #ifdef MODULAR 234 const int chosen = OF_finddevice("/chosen"); 235 const char *module_name; 236 const uint64_t *data; 237 u_int index; 238 paddr_t pa; 239 vaddr_t va; 240 int len; 241 242 if (chosen == -1) 243 return; 244 245 data = fdtbus_get_prop(chosen, "netbsd,modules", &len); 246 if (data == NULL) 247 return; 248 249 for (index = 0; index < len / 16; index++, data += 2) { 250 module_name = fdtbus_get_string_index(chosen, 251 "netbsd,module-names", index); 252 if (module_name == NULL) 253 break; 254 255 const paddr_t startpa = (paddr_t)be64dec(data + 0); 256 const size_t size = (size_t)be64dec(data + 1); 257 const paddr_t endpa = round_page(startpa + size); 258 259 const vaddr_t startva = uvm_km_alloc(kernel_map, endpa - startpa, 260 0, UVM_KMF_VAONLY | UVM_KMF_NOWAIT); 261 if (startva == 0) { 262 printf("ERROR: Cannot allocate VA for module %s\n", 263 module_name); 264 continue; 265 } 266 267 for (pa = startpa, va = startva; 268 pa < endpa; 269 pa += PAGE_SIZE, va += PAGE_SIZE) { 270 pmap_kenter_pa(va, pa, VM_PROT_ALL, 0); 271 } 272 pmap_update(pmap_kernel()); 273 274 module_prime(module_name, (void *)(uintptr_t)startva, size); 275 } 276 #endif /* !MODULAR */ 277 } 278 279 #ifdef EFI_RUNTIME 280 static void 281 arm_fdt_efi_init(device_t dev) 282 { 283 uint64_t efi_system_table; 284 struct efi_tm tm; 285 int error; 286 287 const int chosen = OF_finddevice("/chosen"); 288 if (chosen < 0) 289 return; 290 291 if (of_getprop_uint64(chosen, "netbsd,uefi-system-table", &efi_system_table) != 0) 292 return; 293 294 error = arm_efirt_init(efi_system_table); 295 if (error) 296 return; 297 298 aprint_debug_dev(dev, "EFI system table at %#" PRIx64 "\n", efi_system_table); 299 300 if (arm_efirt_gettime(&tm) == 0) { 301 aprint_normal_dev(dev, "using EFI runtime services for RTC\n"); 302 efi_todr.cookie = NULL; 303 efi_todr.todr_gettime_ymdhms = arm_fdt_efi_rtc_gettime; 304 efi_todr.todr_settime_ymdhms = arm_fdt_efi_rtc_settime; 305 todr_attach(&efi_todr); 306 } 307 } 308 309 static int 310 arm_fdt_efi_rtc_gettime(todr_chip_handle_t tch, struct clock_ymdhms *dt) 311 { 312 struct efi_tm tm; 313 int error; 314 315 error = arm_efirt_gettime(&tm); 316 if (error) 317 return error; 318 319 dt->dt_year = tm.tm_year; 320 dt->dt_mon = tm.tm_mon; 321 dt->dt_day = tm.tm_mday; 322 dt->dt_wday = 0; 323 dt->dt_hour = tm.tm_hour; 324 dt->dt_min = tm.tm_min; 325 dt->dt_sec = tm.tm_sec; 326 327 return 0; 328 } 329 330 static int 331 arm_fdt_efi_rtc_settime(todr_chip_handle_t tch, struct clock_ymdhms *dt) 332 { 333 struct efi_tm tm; 334 335 memset(&tm, 0, sizeof(tm)); 336 tm.tm_year = dt->dt_year; 337 tm.tm_mon = dt->dt_mon; 338 tm.tm_mday = dt->dt_day; 339 tm.tm_hour = dt->dt_hour; 340 tm.tm_min = dt->dt_min; 341 tm.tm_sec = dt->dt_sec; 342 343 return arm_efirt_settime(&tm); 344 } 345 #endif 346
Indexes created Fri Sep 26 20:09:58 GMT 2025