1 /* $NetBSD: arm_fdt.c,v 1.21 2023/04/07 08:55:30 skrll Exp $ */ 2 3 /*- 4 * Copyright (c) 2017 Jared D. McNeill <jmcneill@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 1.21 2023/04/07 08:55:30 skrll 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 48 #include <dev/ofw/openfirm.h> 49 50 #include <arm/fdt/arm_fdtvar.h> 51 52 #include <arm/locore.h> 53 54 #ifdef EFI_RUNTIME 55 #include <arm/arm/efi_runtime.h> 56 #include <dev/clock_subr.h> 57 #endif 58 59 static int arm_fdt_match(device_t, cfdata_t, void *); 60 static void arm_fdt_attach(device_t, device_t, void *); 61 62 static void arm_fdt_irq_default_handler(void *); 63 static void arm_fdt_fiq_default_handler(void *); 64 65 #ifdef EFI_RUNTIME 66 static void arm_fdt_efi_init(device_t); 67 static int arm_fdt_efi_rtc_gettime(todr_chip_handle_t, struct clock_ymdhms *); 68 static int arm_fdt_efi_rtc_settime(todr_chip_handle_t, struct clock_ymdhms *); 69 70 static struct todr_chip_handle efi_todr; 71 #endif 72 73 CFATTACH_DECL_NEW(arm_fdt, 0, 74 arm_fdt_match, arm_fdt_attach, NULL, NULL); 75 76 struct arm_fdt_cpu_hatch_cb { 77 TAILQ_ENTRY(arm_fdt_cpu_hatch_cb) next; 78 void (*cb)(void *, struct cpu_info *); 79 void *priv; 80 }; 81 82 static TAILQ_HEAD(, arm_fdt_cpu_hatch_cb) arm_fdt_cpu_hatch_cbs = 83 TAILQ_HEAD_INITIALIZER(arm_fdt_cpu_hatch_cbs); 84 85 static void (*_arm_fdt_irq_handler)(void *) = arm_fdt_irq_default_handler; 86 static void (*_arm_fdt_fiq_handler)(void *) = arm_fdt_fiq_default_handler; 87 static void (*_arm_fdt_timer_init)(void) = NULL; 88 89 int 90 arm_fdt_match(device_t parent, cfdata_t cf, void *aux) 91 { 92 return 1; 93 } 94 95 void 96 arm_fdt_attach(device_t parent, device_t self, void *aux) 97 { 98 const struct fdt_platform *plat = fdt_platform_find(); 99 struct fdt_attach_args faa; 100 101 aprint_naive("\n"); 102 aprint_normal("\n"); 103 104 DISABLE_INTERRUPT(); 105 106 #ifdef EFI_RUNTIME 107 arm_fdt_efi_init(self); 108 #endif 109 110 plat->fp_init_attach_args(&faa); 111 faa.faa_name = ""; 112 faa.faa_phandle = OF_peer(0); 113 114 config_found(self, &faa, NULL, CFARGS_NONE); 115 } 116 void 117 arm_fdt_cpu_hatch_register(void *priv, void (*cb)(void *, struct cpu_info *)) 118 { 119 struct arm_fdt_cpu_hatch_cb *c; 120 121 c = kmem_alloc(sizeof(*c), KM_SLEEP); 122 c->priv = priv; 123 c->cb = cb; 124 TAILQ_INSERT_TAIL(&arm_fdt_cpu_hatch_cbs, c, next); 125 } 126 127 void 128 arm_fdt_cpu_hatch(struct cpu_info *ci) 129 { 130 struct arm_fdt_cpu_hatch_cb *c; 131 132 TAILQ_FOREACH(c, &arm_fdt_cpu_hatch_cbs, next) 133 c->cb(c->priv, ci); 134 } 135 136 static void 137 arm_fdt_irq_default_handler(void *frame) 138 { 139 panic("No IRQ handler installed"); 140 } 141 142 static void 143 arm_fdt_fiq_default_handler(void *frame) 144 { 145 panic("No FIQ handler installed"); 146 } 147 148 void 149 arm_fdt_irq_set_handler(void (*irq_handler)(void *)) 150 { 151 KASSERT(_arm_fdt_irq_handler == arm_fdt_irq_default_handler); 152 _arm_fdt_irq_handler = irq_handler; 153 } 154 155 void 156 arm_fdt_fiq_set_handler(void (*fiq_handler)(void *)) 157 { 158 KASSERT(_arm_fdt_fiq_handler == arm_fdt_fiq_default_handler); 159 _arm_fdt_fiq_handler = fiq_handler; 160 } 161 162 void 163 arm_fdt_irq_handler(void *tf) 164 { 165 _arm_fdt_irq_handler(tf); 166 } 167 168 void 169 arm_fdt_fiq_handler(void *tf) 170 { 171 _arm_fdt_fiq_handler(tf); 172 } 173 174 void 175 arm_fdt_timer_register(void (*timerfn)(void)) 176 { 177 if (_arm_fdt_timer_init != NULL) { 178 #ifdef DIAGNOSTIC 179 aprint_verbose("%s: timer already registered\n", __func__); 180 #endif 181 return; 182 } 183 _arm_fdt_timer_init = timerfn; 184 } 185 186 #ifdef __HAVE_GENERIC_CPU_INITCLOCKS 187 void 188 cpu_initclocks(void) 189 { 190 if (_arm_fdt_timer_init == NULL) 191 panic("cpu_initclocks: no timer registered"); 192 _arm_fdt_timer_init(); 193 ENABLE_INTERRUPT(); 194 } 195 #endif 196 197 void 198 arm_fdt_module_init(void) 199 { 200 #ifdef MODULAR 201 const int chosen = OF_finddevice("/chosen"); 202 const char *module_name; 203 const uint64_t *data; 204 u_int index; 205 paddr_t pa; 206 vaddr_t va; 207 int len; 208 209 if (chosen == -1) 210 return; 211 212 data = fdtbus_get_prop(chosen, "netbsd,modules", &len); 213 if (data == NULL) 214 return; 215 216 for (index = 0; index < len / 16; index++, data += 2) { 217 module_name = fdtbus_get_string_index(chosen, 218 "netbsd,module-names", index); 219 if (module_name == NULL) 220 break; 221 222 const paddr_t startpa = (paddr_t)be64dec(data + 0); 223 const size_t size = (size_t)be64dec(data + 1); 224 const paddr_t endpa = round_page(startpa + size); 225 226 const vaddr_t startva = uvm_km_alloc(kernel_map, endpa - startpa, 227 0, UVM_KMF_VAONLY | UVM_KMF_NOWAIT); 228 if (startva == 0) { 229 printf("ERROR: Cannot allocate VA for module %s\n", 230 module_name); 231 continue; 232 } 233 234 for (pa = startpa, va = startva; 235 pa < endpa; 236 pa += PAGE_SIZE, va += PAGE_SIZE) { 237 pmap_kenter_pa(va, pa, VM_PROT_ALL, 0); 238 } 239 pmap_update(pmap_kernel()); 240 241 module_prime(module_name, (void *)(uintptr_t)startva, size); 242 } 243 #endif /* !MODULAR */ 244 } 245 246 #ifdef EFI_RUNTIME 247 static void 248 arm_fdt_efi_init(device_t dev) 249 { 250 uint64_t efi_system_table; 251 struct efi_tm tm; 252 int error; 253 254 const int chosen = OF_finddevice("/chosen"); 255 if (chosen < 0) 256 return; 257 258 if (of_getprop_uint64(chosen, "netbsd,uefi-system-table", &efi_system_table) != 0) 259 return; 260 261 error = arm_efirt_init(efi_system_table); 262 if (error) 263 return; 264 265 aprint_debug_dev(dev, "EFI system table at %#" PRIx64 "\n", efi_system_table); 266 267 if (arm_efirt_gettime(&tm, NULL) == 0) { 268 aprint_normal_dev(dev, "using EFI runtime services for RTC\n"); 269 efi_todr.cookie = NULL; 270 efi_todr.todr_gettime_ymdhms = arm_fdt_efi_rtc_gettime; 271 efi_todr.todr_settime_ymdhms = arm_fdt_efi_rtc_settime; 272 todr_attach(&efi_todr); 273 } 274 } 275 276 static int 277 arm_fdt_efi_rtc_gettime(todr_chip_handle_t tch, struct clock_ymdhms *dt) 278 { 279 struct efi_tm tm; 280 efi_status status; 281 282 status = arm_efirt_gettime(&tm, NULL); 283 if (status != 0) 284 return EIO; 285 286 dt->dt_year = tm.tm_year; 287 dt->dt_mon = tm.tm_mon; 288 dt->dt_day = tm.tm_mday; 289 dt->dt_wday = 0; 290 dt->dt_hour = tm.tm_hour; 291 dt->dt_min = tm.tm_min; 292 dt->dt_sec = tm.tm_sec; 293 294 return 0; 295 } 296 297 static int 298 arm_fdt_efi_rtc_settime(todr_chip_handle_t tch, struct clock_ymdhms *dt) 299 { 300 struct efi_tm tm; 301 efi_status status; 302 303 memset(&tm, 0, sizeof(tm)); 304 tm.tm_year = dt->dt_year; 305 tm.tm_mon = dt->dt_mon; 306 tm.tm_mday = dt->dt_day; 307 tm.tm_hour = dt->dt_hour; 308 tm.tm_min = dt->dt_min; 309 tm.tm_sec = dt->dt_sec; 310 311 status = arm_efirt_settime(&tm); 312 if (status != 0) 313 return EIO; 314 315 return 0; 316 } 317 #endif 318