acpi_platform.c revision 1.12.2.2
1 /* $NetBSD: acpi_platform.c,v 1.12.2.2 2019/06/10 22:05:50 christos 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 1.12.2.2 2019/06/10 22:05:50 christos 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 static const struct pmap_devmap * 98 acpi_platform_devmap(void) 99 { 100 static const struct pmap_devmap devmap[] = { 101 DEVMAP_ENTRY_END 102 }; 103 104 return devmap; 105 } 106 107 static void 108 acpi_platform_bootstrap(void) 109 { 110 } 111 112 static void 113 acpi_platform_startup(void) 114 { 115 ACPI_TABLE_SPCR *spcr; 116 ACPI_TABLE_FADT *fadt; 117 #ifdef MULTIPROCESSOR 118 ACPI_TABLE_MADT *madt; 119 #endif 120 int baud_rate; 121 122 /* 123 * Setup serial console device 124 */ 125 if (ACPI_SUCCESS(acpi_table_find(ACPI_SIG_SPCR, (void **)&spcr))) { 126 127 switch (spcr->BaudRate) { 128 case SPCR_BAUD_9600: 129 baud_rate = 9600; 130 break; 131 case SPCR_BAUD_19200: 132 baud_rate = 19200; 133 break; 134 case SPCR_BAUD_57600: 135 baud_rate = 57600; 136 break; 137 case SPCR_BAUD_115200: 138 case SPCR_BAUD_UNKNOWN: 139 default: 140 baud_rate = 115200; 141 break; 142 } 143 144 if (spcr->SerialPort.SpaceId == ACPI_ADR_SPACE_SYSTEM_MEMORY && 145 spcr->SerialPort.Address != 0) { 146 switch (spcr->InterfaceType) { 147 #if NPLCOM > 0 148 case ACPI_DBG2_ARM_PL011: 149 case ACPI_DBG2_ARM_SBSA_32BIT: 150 case ACPI_DBG2_ARM_SBSA_GENERIC: 151 plcom_console.pi_type = PLCOM_TYPE_PL011; 152 plcom_console.pi_iot = &arm_generic_bs_tag; 153 plcom_console.pi_iobase = spcr->SerialPort.Address; 154 plcom_console.pi_size = PL011COM_UART_SIZE; 155 if (spcr->InterfaceType == ACPI_DBG2_ARM_SBSA_32BIT) { 156 plcom_console.pi_flags = PLC_FLAG_32BIT_ACCESS; 157 } else { 158 plcom_console.pi_flags = ACPI_ACCESS_BIT_WIDTH(spcr->SerialPort.AccessWidth) == 8 ? 159 0 : PLC_FLAG_32BIT_ACCESS; 160 } 161 162 plcomcnattach(&plcom_console, baud_rate, 0, TTYDEF_CFLAG, -1); 163 break; 164 #endif 165 #if NCOM > 0 166 case ACPI_DBG2_16550_COMPATIBLE: 167 case ACPI_DBG2_16550_SUBSET: 168 if (ACPI_ACCESS_BIT_WIDTH(spcr->SerialPort.AccessWidth) == 8) { 169 comcnattach(&arm_generic_bs_tag, spcr->SerialPort.Address, baud_rate, -1, 170 COM_TYPE_NORMAL, TTYDEF_CFLAG); 171 } else { 172 comcnattach(&arm_generic_a4x_bs_tag, spcr->SerialPort.Address, baud_rate, -1, 173 COM_TYPE_NORMAL, TTYDEF_CFLAG); 174 } 175 break; 176 case ACPI_DBG2_BCM2835: 177 comcnattach(&arm_generic_a4x_bs_tag, spcr->SerialPort.Address + 0x40, baud_rate, -1, 178 COM_TYPE_BCMAUXUART, TTYDEF_CFLAG); 179 cn_set_magic("+++++"); 180 break; 181 #endif 182 default: 183 printf("SPCR: kernel does not support interface type %#x\n", spcr->InterfaceType); 184 break; 185 } 186 } 187 acpi_table_unmap((ACPI_TABLE_HEADER *)spcr); 188 } 189 190 /* 191 * Initialize PSCI 0.2+ if implemented 192 */ 193 if (ACPI_SUCCESS(acpi_table_find(ACPI_SIG_FADT, (void **)&fadt))) { 194 if (fadt->ArmBootFlags & ACPI_FADT_PSCI_COMPLIANT) { 195 if (fadt->ArmBootFlags & ACPI_FADT_PSCI_USE_HVC) { 196 psci_init(psci_call_hvc); 197 } else { 198 psci_init(psci_call_smc); 199 } 200 } 201 acpi_table_unmap((ACPI_TABLE_HEADER *)fadt); 202 } 203 204 #ifdef MULTIPROCESSOR 205 /* 206 * Count CPUs 207 */ 208 if (ACPI_SUCCESS(acpi_table_find(ACPI_SIG_MADT, (void **)&madt))) { 209 char *end = (char *)madt + madt->Header.Length; 210 char *where = (char *)madt + sizeof(ACPI_TABLE_MADT); 211 while (where < end) { 212 ACPI_SUBTABLE_HEADER *subtable = (ACPI_SUBTABLE_HEADER *)where; 213 if (subtable->Type == ACPI_MADT_TYPE_GENERIC_INTERRUPT) 214 arm_cpu_max++; 215 where += subtable->Length; 216 } 217 acpi_table_unmap((ACPI_TABLE_HEADER *)madt); 218 } 219 #endif /* MULTIPROCESSOR */ 220 } 221 222 static void 223 acpi_platform_init_attach_args(struct fdt_attach_args *faa) 224 { 225 extern struct arm32_bus_dma_tag arm_generic_dma_tag; 226 extern struct bus_space arm_generic_bs_tag; 227 extern struct bus_space arm_generic_a4x_bs_tag; 228 229 faa->faa_bst = &arm_generic_bs_tag; 230 faa->faa_a4x_bst = &arm_generic_a4x_bs_tag; 231 faa->faa_dmat = &arm_generic_dma_tag; 232 } 233 234 static void 235 acpi_platform_device_register(device_t self, void *aux) 236 { 237 #if NCOM > 0 238 prop_dictionary_t prop = device_properties(self); 239 240 if (device_is_a(self, "com")) { 241 ACPI_TABLE_SPCR *spcr; 242 243 if (ACPI_FAILURE(acpi_table_find(ACPI_SIG_SPCR, (void **)&spcr))) 244 return; 245 246 if (spcr->SerialPort.SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY) 247 goto spcr_unmap; 248 if (spcr->SerialPort.Address == 0) 249 goto spcr_unmap; 250 if (spcr->InterfaceType != ACPI_DBG2_16550_COMPATIBLE && 251 spcr->InterfaceType != ACPI_DBG2_16550_SUBSET) 252 goto spcr_unmap; 253 254 if (device_is_a(device_parent(self), "puc")) { 255 const struct puc_attach_args * const paa = aux; 256 int b, d, f; 257 258 const int s = pci_get_segment(paa->pc); 259 pci_decompose_tag(paa->pc, paa->tag, &b, &d, &f); 260 261 if (spcr->PciSegment == s && spcr->PciBus == b && 262 spcr->PciDevice == d && spcr->PciFunction == f) 263 prop_dictionary_set_bool(prop, "force_console", true); 264 } 265 266 if (device_is_a(device_parent(self), "acpi")) { 267 struct acpi_attach_args * const aa = aux; 268 struct acpi_resources res; 269 struct acpi_mem *mem; 270 271 if (ACPI_FAILURE(acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS", 272 &res, &acpi_resource_parse_ops_quiet))) 273 goto spcr_unmap; 274 275 mem = acpi_res_mem(&res, 0); 276 if (mem == NULL) 277 goto crs_cleanup; 278 279 if (mem->ar_base == spcr->SerialPort.Address) 280 prop_dictionary_set_bool(prop, "force_console", true); 281 282 crs_cleanup: 283 acpi_resource_cleanup(&res); 284 } 285 286 spcr_unmap: 287 acpi_table_unmap((ACPI_TABLE_HEADER *)spcr); 288 } 289 #endif 290 } 291 292 static void 293 acpi_platform_reset(void) 294 { 295 #ifdef EFI_RUNTIME 296 if (arm_efirt_reset(EFI_RESET_COLD) == 0) 297 return; 298 #endif 299 if (psci_available()) 300 psci_system_reset(); 301 } 302 303 static u_int 304 acpi_platform_uart_freq(void) 305 { 306 return 0; 307 } 308 309 static const struct arm_platform acpi_platform = { 310 .ap_devmap = acpi_platform_devmap, 311 .ap_bootstrap = acpi_platform_bootstrap, 312 .ap_startup = acpi_platform_startup, 313 .ap_init_attach_args = acpi_platform_init_attach_args, 314 .ap_device_register = acpi_platform_device_register, 315 .ap_reset = acpi_platform_reset, 316 .ap_delay = gtmr_delay, 317 .ap_uart_freq = acpi_platform_uart_freq, 318 }; 319 320 ARM_PLATFORM(virt, "netbsd,generic-acpi", &acpi_platform); 321
Indexes created Fri Oct 03 02:09:57 GMT 2025