acpi_platform.c revision 1.13
1 /* $NetBSD: acpi_platform.c,v 1.13 2019/06/19 13:39:18 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2018 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jared McNeill <jmcneill (at) invisible.ca>. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include "com.h" 33 #include "plcom.h" 34 #include "opt_efi.h" 35 #include "opt_multiprocessor.h" 36 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: acpi_platform.c,v 1.13 2019/06/19 13:39:18 jmcneill Exp $"); 39 40 #include <sys/param.h> 41 #include <sys/bus.h> 42 #include <sys/cpu.h> 43 #include <sys/device.h> 44 #include <sys/termios.h> 45 46 #include <dev/fdt/fdtvar.h> 47 #include <arm/fdt/arm_fdtvar.h> 48 49 #include <uvm/uvm_extern.h> 50 51 #include <machine/bootconfig.h> 52 #include <arm/cpufunc.h> 53 #include <arm/locore.h> 54 55 #include <arm/cortex/gtmr_var.h> 56 57 #include <arm/arm/psci.h> 58 #include <arm/fdt/psci_fdtvar.h> 59 60 #include <evbarm/fdt/platform.h> 61 62 #include <evbarm/dev/plcomreg.h> 63 #include <evbarm/dev/plcomvar.h> 64 #include <dev/ic/ns16550reg.h> 65 #include <dev/ic/comreg.h> 66 #include <dev/ic/comvar.h> 67 68 #if NCOM > 0 69 #include <dev/pci/pcireg.h> 70 #include <dev/pci/pcivar.h> 71 #include <dev/pci/pucvar.h> 72 #endif 73 74 #ifdef EFI_RUNTIME 75 #include <arm/arm/efi_runtime.h> 76 #endif 77 78 #include <dev/acpi/acpireg.h> 79 #include <dev/acpi/acpivar.h> 80 #include <arm/acpi/acpi_table.h> 81 82 #include <libfdt.h> 83 84 #define SPCR_BAUD_UNKNOWN 0 85 #define SPCR_BAUD_9600 3 86 #define SPCR_BAUD_19200 4 87 #define SPCR_BAUD_57600 6 88 #define SPCR_BAUD_115200 7 89 90 extern struct bus_space arm_generic_bs_tag; 91 extern struct bus_space arm_generic_a4x_bs_tag; 92 93 #if NPLCOM > 0 94 static struct plcom_instance plcom_console; 95 #endif 96 97 struct arm32_bus_dma_tag acpi_coherent32_dma_tag; 98 static struct arm32_dma_range acpi_coherent32_ranges[] = { 99 [0] = { 100 .dr_sysbase = 0, 101 .dr_busbase = 0, 102 .dr_len = 0xffffffffU, 103 .dr_flags = _BUS_DMAMAP_COHERENT, 104 } 105 }; 106 107 struct arm32_bus_dma_tag acpi_coherent64_dma_tag; 108 static struct arm32_dma_range acpi_coherent64_ranges[] = { 109 [0] = { 110 .dr_sysbase = 0, 111 .dr_busbase = 0, 112 .dr_len = UINTPTR_MAX, 113 .dr_flags = _BUS_DMAMAP_COHERENT, 114 } 115 }; 116 117 static const struct pmap_devmap * 118 acpi_platform_devmap(void) 119 { 120 static const struct pmap_devmap devmap[] = { 121 DEVMAP_ENTRY_END 122 }; 123 124 return devmap; 125 } 126 127 static void 128 acpi_platform_bootstrap(void) 129 { 130 extern struct arm32_bus_dma_tag arm_generic_dma_tag; 131 132 acpi_coherent32_dma_tag = arm_generic_dma_tag; 133 acpi_coherent32_dma_tag._ranges = acpi_coherent32_ranges; 134 acpi_coherent32_dma_tag._nranges = __arraycount(acpi_coherent32_ranges); 135 136 acpi_coherent64_dma_tag = arm_generic_dma_tag; 137 acpi_coherent64_dma_tag._ranges = acpi_coherent64_ranges; 138 acpi_coherent64_dma_tag._nranges = __arraycount(acpi_coherent64_ranges); 139 } 140 141 static void 142 acpi_platform_startup(void) 143 { 144 ACPI_TABLE_SPCR *spcr; 145 ACPI_TABLE_FADT *fadt; 146 #ifdef MULTIPROCESSOR 147 ACPI_TABLE_MADT *madt; 148 #endif 149 int baud_rate; 150 151 /* 152 * Setup serial console device 153 */ 154 if (ACPI_SUCCESS(acpi_table_find(ACPI_SIG_SPCR, (void **)&spcr))) { 155 156 switch (spcr->BaudRate) { 157 case SPCR_BAUD_9600: 158 baud_rate = 9600; 159 break; 160 case SPCR_BAUD_19200: 161 baud_rate = 19200; 162 break; 163 case SPCR_BAUD_57600: 164 baud_rate = 57600; 165 break; 166 case SPCR_BAUD_115200: 167 case SPCR_BAUD_UNKNOWN: 168 default: 169 baud_rate = 115200; 170 break; 171 } 172 173 if (spcr->SerialPort.SpaceId == ACPI_ADR_SPACE_SYSTEM_MEMORY && 174 spcr->SerialPort.Address != 0) { 175 switch (spcr->InterfaceType) { 176 #if NPLCOM > 0 177 case ACPI_DBG2_ARM_PL011: 178 case ACPI_DBG2_ARM_SBSA_32BIT: 179 case ACPI_DBG2_ARM_SBSA_GENERIC: 180 plcom_console.pi_type = PLCOM_TYPE_PL011; 181 plcom_console.pi_iot = &arm_generic_bs_tag; 182 plcom_console.pi_iobase = spcr->SerialPort.Address; 183 plcom_console.pi_size = PL011COM_UART_SIZE; 184 if (spcr->InterfaceType == ACPI_DBG2_ARM_SBSA_32BIT) { 185 plcom_console.pi_flags = PLC_FLAG_32BIT_ACCESS; 186 } else { 187 plcom_console.pi_flags = ACPI_ACCESS_BIT_WIDTH(spcr->SerialPort.AccessWidth) == 8 ? 188 0 : PLC_FLAG_32BIT_ACCESS; 189 } 190 191 plcomcnattach(&plcom_console, baud_rate, 0, TTYDEF_CFLAG, -1); 192 break; 193 #endif 194 #if NCOM > 0 195 case ACPI_DBG2_16550_COMPATIBLE: 196 case ACPI_DBG2_16550_SUBSET: 197 if (ACPI_ACCESS_BIT_WIDTH(spcr->SerialPort.AccessWidth) == 8) { 198 comcnattach(&arm_generic_bs_tag, spcr->SerialPort.Address, baud_rate, -1, 199 COM_TYPE_NORMAL, TTYDEF_CFLAG); 200 } else { 201 comcnattach(&arm_generic_a4x_bs_tag, spcr->SerialPort.Address, baud_rate, -1, 202 COM_TYPE_NORMAL, TTYDEF_CFLAG); 203 } 204 break; 205 case ACPI_DBG2_BCM2835: 206 comcnattach(&arm_generic_a4x_bs_tag, spcr->SerialPort.Address + 0x40, baud_rate, -1, 207 COM_TYPE_BCMAUXUART, TTYDEF_CFLAG); 208 cn_set_magic("+++++"); 209 break; 210 #endif 211 default: 212 printf("SPCR: kernel does not support interface type %#x\n", spcr->InterfaceType); 213 break; 214 } 215 } 216 acpi_table_unmap((ACPI_TABLE_HEADER *)spcr); 217 } 218 219 /* 220 * Initialize PSCI 0.2+ if implemented 221 */ 222 if (ACPI_SUCCESS(acpi_table_find(ACPI_SIG_FADT, (void **)&fadt))) { 223 if (fadt->ArmBootFlags & ACPI_FADT_PSCI_COMPLIANT) { 224 if (fadt->ArmBootFlags & ACPI_FADT_PSCI_USE_HVC) { 225 psci_init(psci_call_hvc); 226 } else { 227 psci_init(psci_call_smc); 228 } 229 } 230 acpi_table_unmap((ACPI_TABLE_HEADER *)fadt); 231 } 232 233 #ifdef MULTIPROCESSOR 234 /* 235 * Count CPUs 236 */ 237 if (ACPI_SUCCESS(acpi_table_find(ACPI_SIG_MADT, (void **)&madt))) { 238 char *end = (char *)madt + madt->Header.Length; 239 char *where = (char *)madt + sizeof(ACPI_TABLE_MADT); 240 while (where < end) { 241 ACPI_SUBTABLE_HEADER *subtable = (ACPI_SUBTABLE_HEADER *)where; 242 if (subtable->Type == ACPI_MADT_TYPE_GENERIC_INTERRUPT) 243 arm_cpu_max++; 244 where += subtable->Length; 245 } 246 acpi_table_unmap((ACPI_TABLE_HEADER *)madt); 247 } 248 #endif /* MULTIPROCESSOR */ 249 } 250 251 static void 252 acpi_platform_init_attach_args(struct fdt_attach_args *faa) 253 { 254 extern struct bus_space arm_generic_bs_tag; 255 extern struct bus_space arm_generic_a4x_bs_tag; 256 257 faa->faa_bst = &arm_generic_bs_tag; 258 faa->faa_a4x_bst = &arm_generic_a4x_bs_tag; 259 faa->faa_dmat = &acpi_coherent64_dma_tag; 260 } 261 262 static void 263 acpi_platform_device_register(device_t self, void *aux) 264 { 265 #if NCOM > 0 266 prop_dictionary_t prop = device_properties(self); 267 268 if (device_is_a(self, "com")) { 269 ACPI_TABLE_SPCR *spcr; 270 271 if (ACPI_FAILURE(acpi_table_find(ACPI_SIG_SPCR, (void **)&spcr))) 272 return; 273 274 if (spcr->SerialPort.SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY) 275 goto spcr_unmap; 276 if (spcr->SerialPort.Address == 0) 277 goto spcr_unmap; 278 if (spcr->InterfaceType != ACPI_DBG2_16550_COMPATIBLE && 279 spcr->InterfaceType != ACPI_DBG2_16550_SUBSET) 280 goto spcr_unmap; 281 282 if (device_is_a(device_parent(self), "puc")) { 283 const struct puc_attach_args * const paa = aux; 284 int b, d, f; 285 286 const int s = pci_get_segment(paa->pc); 287 pci_decompose_tag(paa->pc, paa->tag, &b, &d, &f); 288 289 if (spcr->PciSegment == s && spcr->PciBus == b && 290 spcr->PciDevice == d && spcr->PciFunction == f) 291 prop_dictionary_set_bool(prop, "force_console", true); 292 } 293 294 if (device_is_a(device_parent(self), "acpi")) { 295 struct acpi_attach_args * const aa = aux; 296 struct acpi_resources res; 297 struct acpi_mem *mem; 298 299 if (ACPI_FAILURE(acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS", 300 &res, &acpi_resource_parse_ops_quiet))) 301 goto spcr_unmap; 302 303 mem = acpi_res_mem(&res, 0); 304 if (mem == NULL) 305 goto crs_cleanup; 306 307 if (mem->ar_base == spcr->SerialPort.Address) 308 prop_dictionary_set_bool(prop, "force_console", true); 309 310 crs_cleanup: 311 acpi_resource_cleanup(&res); 312 } 313 314 spcr_unmap: 315 acpi_table_unmap((ACPI_TABLE_HEADER *)spcr); 316 } 317 #endif 318 } 319 320 static void 321 acpi_platform_reset(void) 322 { 323 #ifdef EFI_RUNTIME 324 if (arm_efirt_reset(EFI_RESET_COLD) == 0) 325 return; 326 #endif 327 if (psci_available()) 328 psci_system_reset(); 329 } 330 331 static u_int 332 acpi_platform_uart_freq(void) 333 { 334 return 0; 335 } 336 337 static const struct arm_platform acpi_platform = { 338 .ap_devmap = acpi_platform_devmap, 339 .ap_bootstrap = acpi_platform_bootstrap, 340 .ap_startup = acpi_platform_startup, 341 .ap_init_attach_args = acpi_platform_init_attach_args, 342 .ap_device_register = acpi_platform_device_register, 343 .ap_reset = acpi_platform_reset, 344 .ap_delay = gtmr_delay, 345 .ap_uart_freq = acpi_platform_uart_freq, 346 }; 347 348 ARM_PLATFORM(virt, "netbsd,generic-acpi", &acpi_platform); 349
Indexes created Wed Sep 24 22:09:59 GMT 2025