acpi_platform.c revision 1.18
1 /* $NetBSD: acpi_platform.c,v 1.18 2019/09/22 18:31:59 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 "wsdisplay.h" 35 #include "genfb.h" 36 #include "opt_efi.h" 37 #include "opt_multiprocessor.h" 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: acpi_platform.c,v 1.18 2019/09/22 18:31:59 jmcneill Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/bus.h> 44 #include <sys/cpu.h> 45 #include <sys/device.h> 46 #include <sys/termios.h> 47 48 #include <dev/fdt/fdtvar.h> 49 #include <arm/fdt/arm_fdtvar.h> 50 51 #include <uvm/uvm_extern.h> 52 53 #include <machine/bootconfig.h> 54 #include <arm/cpufunc.h> 55 #include <arm/locore.h> 56 57 #include <arm/cortex/gtmr_var.h> 58 59 #include <arm/arm/psci.h> 60 #include <arm/fdt/psci_fdtvar.h> 61 62 #include <evbarm/fdt/platform.h> 63 64 #include <evbarm/dev/plcomreg.h> 65 #include <evbarm/dev/plcomvar.h> 66 #include <dev/ic/ns16550reg.h> 67 #include <dev/ic/comreg.h> 68 #include <dev/ic/comvar.h> 69 70 #if NCOM > 0 71 #include <dev/pci/pcireg.h> 72 #include <dev/pci/pcivar.h> 73 #include <dev/pci/pucvar.h> 74 #endif 75 76 #if NWSDISPLAY > 0 && NGENFB > 0 77 #include <arm/acpi/acpi_simplefb.h> 78 #endif 79 80 #ifdef EFI_RUNTIME 81 #include <arm/arm/efi_runtime.h> 82 #endif 83 84 #include <dev/acpi/acpireg.h> 85 #include <dev/acpi/acpivar.h> 86 #include <arm/acpi/acpi_table.h> 87 88 #include <libfdt.h> 89 90 #define SPCR_BAUD_UNKNOWN 0 91 #define SPCR_BAUD_9600 3 92 #define SPCR_BAUD_19200 4 93 #define SPCR_BAUD_57600 6 94 #define SPCR_BAUD_115200 7 95 96 extern struct bus_space arm_generic_bs_tag; 97 extern struct bus_space arm_generic_a4x_bs_tag; 98 99 #if NPLCOM > 0 100 static struct plcom_instance plcom_console; 101 #endif 102 103 struct arm32_bus_dma_tag acpi_coherent_dma_tag; 104 static struct arm32_dma_range acpi_coherent_ranges[] = { 105 [0] = { 106 .dr_sysbase = 0, 107 .dr_busbase = 0, 108 .dr_len = UINTPTR_MAX, 109 .dr_flags = _BUS_DMAMAP_COHERENT, 110 } 111 }; 112 113 static const struct pmap_devmap * 114 acpi_platform_devmap(void) 115 { 116 static const struct pmap_devmap devmap[] = { 117 DEVMAP_ENTRY_END 118 }; 119 120 return devmap; 121 } 122 123 static void 124 acpi_platform_bootstrap(void) 125 { 126 extern struct arm32_bus_dma_tag arm_generic_dma_tag; 127 128 acpi_coherent_dma_tag = arm_generic_dma_tag; 129 acpi_coherent_dma_tag._ranges = acpi_coherent_ranges; 130 acpi_coherent_dma_tag._nranges = __arraycount(acpi_coherent_ranges); 131 } 132 133 static void 134 acpi_platform_startup(void) 135 { 136 ACPI_TABLE_SPCR *spcr; 137 ACPI_TABLE_FADT *fadt; 138 #ifdef MULTIPROCESSOR 139 ACPI_TABLE_MADT *madt; 140 #endif 141 int baud_rate; 142 143 /* 144 * Setup serial console device 145 */ 146 if (ACPI_SUCCESS(acpi_table_find(ACPI_SIG_SPCR, (void **)&spcr))) { 147 148 switch (spcr->BaudRate) { 149 case SPCR_BAUD_9600: 150 baud_rate = 9600; 151 break; 152 case SPCR_BAUD_19200: 153 baud_rate = 19200; 154 break; 155 case SPCR_BAUD_57600: 156 baud_rate = 57600; 157 break; 158 case SPCR_BAUD_115200: 159 case SPCR_BAUD_UNKNOWN: 160 default: 161 baud_rate = 115200; 162 break; 163 } 164 165 if (spcr->SerialPort.SpaceId == ACPI_ADR_SPACE_SYSTEM_MEMORY && 166 spcr->SerialPort.Address != 0) { 167 switch (spcr->InterfaceType) { 168 #if NPLCOM > 0 169 case ACPI_DBG2_ARM_PL011: 170 case ACPI_DBG2_ARM_SBSA_32BIT: 171 case ACPI_DBG2_ARM_SBSA_GENERIC: 172 plcom_console.pi_type = PLCOM_TYPE_PL011; 173 plcom_console.pi_iot = &arm_generic_bs_tag; 174 plcom_console.pi_iobase = spcr->SerialPort.Address; 175 plcom_console.pi_size = PL011COM_UART_SIZE; 176 plcom_console.pi_flags = PLC_FLAG_32BIT_ACCESS; 177 178 plcomcnattach(&plcom_console, baud_rate, 0, TTYDEF_CFLAG, -1); 179 break; 180 #endif 181 #if NCOM > 0 182 case ACPI_DBG2_16550_COMPATIBLE: 183 case ACPI_DBG2_16550_SUBSET: 184 if (ACPI_ACCESS_BIT_WIDTH(spcr->SerialPort.AccessWidth) == 8) { 185 comcnattach(&arm_generic_bs_tag, spcr->SerialPort.Address, baud_rate, -1, 186 COM_TYPE_NORMAL, TTYDEF_CFLAG); 187 } else { 188 comcnattach(&arm_generic_a4x_bs_tag, spcr->SerialPort.Address, baud_rate, -1, 189 COM_TYPE_NORMAL, TTYDEF_CFLAG); 190 } 191 break; 192 case ACPI_DBG2_BCM2835: 193 comcnattach(&arm_generic_a4x_bs_tag, spcr->SerialPort.Address + 0x40, baud_rate, -1, 194 COM_TYPE_BCMAUXUART, TTYDEF_CFLAG); 195 cn_set_magic("+++++"); 196 break; 197 #endif 198 default: 199 printf("SPCR: kernel does not support interface type %#x\n", spcr->InterfaceType); 200 break; 201 } 202 } 203 acpi_table_unmap((ACPI_TABLE_HEADER *)spcr); 204 } 205 206 /* 207 * Initialize PSCI 0.2+ if implemented 208 */ 209 if (ACPI_SUCCESS(acpi_table_find(ACPI_SIG_FADT, (void **)&fadt))) { 210 if (fadt->ArmBootFlags & ACPI_FADT_PSCI_COMPLIANT) { 211 if (fadt->ArmBootFlags & ACPI_FADT_PSCI_USE_HVC) { 212 psci_init(psci_call_hvc); 213 } else { 214 psci_init(psci_call_smc); 215 } 216 } 217 acpi_table_unmap((ACPI_TABLE_HEADER *)fadt); 218 } 219 220 #ifdef MULTIPROCESSOR 221 /* 222 * Count CPUs 223 */ 224 if (ACPI_SUCCESS(acpi_table_find(ACPI_SIG_MADT, (void **)&madt))) { 225 char *end = (char *)madt + madt->Header.Length; 226 char *where = (char *)madt + sizeof(ACPI_TABLE_MADT); 227 while (where < end) { 228 ACPI_SUBTABLE_HEADER *subtable = (ACPI_SUBTABLE_HEADER *)where; 229 if (subtable->Type == ACPI_MADT_TYPE_GENERIC_INTERRUPT) 230 arm_cpu_max++; 231 where += subtable->Length; 232 } 233 acpi_table_unmap((ACPI_TABLE_HEADER *)madt); 234 } 235 #endif /* MULTIPROCESSOR */ 236 } 237 238 static void 239 acpi_platform_init_attach_args(struct fdt_attach_args *faa) 240 { 241 extern struct bus_space arm_generic_bs_tag; 242 extern struct bus_space arm_generic_a4x_bs_tag; 243 244 faa->faa_bst = &arm_generic_bs_tag; 245 faa->faa_a4x_bst = &arm_generic_a4x_bs_tag; 246 faa->faa_dmat = &acpi_coherent_dma_tag; 247 } 248 249 static void 250 acpi_platform_device_register(device_t self, void *aux) 251 { 252 #if NWSDISPLAY > 0 && NGENFB > 0 253 if (device_is_a(self, "armfdt")) { 254 /* 255 * Setup framebuffer console, if present. 256 */ 257 acpi_simplefb_preattach(); 258 } 259 #endif 260 261 #if NCOM > 0 262 prop_dictionary_t prop = device_properties(self); 263 264 if (device_is_a(self, "com")) { 265 ACPI_TABLE_SPCR *spcr; 266 267 if (ACPI_FAILURE(acpi_table_find(ACPI_SIG_SPCR, (void **)&spcr))) 268 return; 269 270 if (spcr->SerialPort.SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY) 271 goto spcr_unmap; 272 if (spcr->SerialPort.Address == 0) 273 goto spcr_unmap; 274 if (spcr->InterfaceType != ACPI_DBG2_16550_COMPATIBLE && 275 spcr->InterfaceType != ACPI_DBG2_16550_SUBSET) 276 goto spcr_unmap; 277 278 if (device_is_a(device_parent(self), "puc")) { 279 const struct puc_attach_args * const paa = aux; 280 int b, d, f; 281 282 const int s = pci_get_segment(paa->pc); 283 pci_decompose_tag(paa->pc, paa->tag, &b, &d, &f); 284 285 if (spcr->PciSegment == s && spcr->PciBus == b && 286 spcr->PciDevice == d && spcr->PciFunction == f) 287 prop_dictionary_set_bool(prop, "force_console", true); 288 } 289 290 if (device_is_a(device_parent(self), "acpi")) { 291 struct acpi_attach_args * const aa = aux; 292 struct acpi_resources res; 293 struct acpi_mem *mem; 294 295 if (ACPI_FAILURE(acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS", 296 &res, &acpi_resource_parse_ops_quiet))) 297 goto spcr_unmap; 298 299 mem = acpi_res_mem(&res, 0); 300 if (mem == NULL) 301 goto crs_cleanup; 302 303 if (mem->ar_base == spcr->SerialPort.Address) 304 prop_dictionary_set_bool(prop, "force_console", true); 305 306 crs_cleanup: 307 acpi_resource_cleanup(&res); 308 } 309 310 spcr_unmap: 311 acpi_table_unmap((ACPI_TABLE_HEADER *)spcr); 312 } 313 #endif 314 } 315 316 static void 317 acpi_platform_reset(void) 318 { 319 #ifdef EFI_RUNTIME 320 if (arm_efirt_reset(EFI_RESET_COLD) == 0) 321 return; 322 #endif 323 if (psci_available()) 324 psci_system_reset(); 325 } 326 327 static u_int 328 acpi_platform_uart_freq(void) 329 { 330 return 0; 331 } 332 333 static const struct arm_platform acpi_platform = { 334 .ap_devmap = acpi_platform_devmap, 335 .ap_bootstrap = acpi_platform_bootstrap, 336 .ap_startup = acpi_platform_startup, 337 .ap_init_attach_args = acpi_platform_init_attach_args, 338 .ap_device_register = acpi_platform_device_register, 339 .ap_reset = acpi_platform_reset, 340 .ap_delay = gtmr_delay, 341 .ap_uart_freq = acpi_platform_uart_freq, 342 }; 343 344 ARM_PLATFORM(acpi, "netbsd,generic-acpi", &acpi_platform); 345
Indexes created Tue Sep 23 23:09:58 GMT 2025