acpi_platform.c revision 1.4.2.3
1 /* $NetBSD: acpi_platform.c,v 1.4.2.3 2018/11/26 01:52:17 pgoyette 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 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: acpi_platform.c,v 1.4.2.3 2018/11/26 01:52:17 pgoyette Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/bus.h> 41 #include <sys/cpu.h> 42 #include <sys/device.h> 43 #include <sys/termios.h> 44 45 #include <dev/fdt/fdtvar.h> 46 #include <arm/fdt/arm_fdtvar.h> 47 48 #include <uvm/uvm_extern.h> 49 50 #include <machine/bootconfig.h> 51 #include <arm/cpufunc.h> 52 #include <arm/locore.h> 53 54 #include <arm/cortex/gtmr_var.h> 55 56 #include <arm/arm/psci.h> 57 #include <arm/fdt/psci_fdtvar.h> 58 59 #include <evbarm/fdt/platform.h> 60 61 #include <evbarm/dev/plcomreg.h> 62 #include <evbarm/dev/plcomvar.h> 63 #include <dev/ic/ns16550reg.h> 64 #include <dev/ic/comreg.h> 65 #include <dev/ic/comvar.h> 66 67 #ifdef EFI_RUNTIME 68 #include <arm/arm/efi_runtime.h> 69 #endif 70 71 #include <dev/acpi/acpireg.h> 72 #include <dev/acpi/acpivar.h> 73 #include <arm/acpi/acpi_table.h> 74 75 #include <libfdt.h> 76 77 #define SPCR_INTERFACE_TYPE_PL011 0x0003 78 #define SPCR_INTERFACE_TYPE_SBSA_32BIT 0x000d 79 #define SPCR_INTERFACE_TYPE_SBSA_GENERIC 0x000e 80 #define SPCR_INTERFACE_TYPE_BCM2835 0x0010 81 82 #define SPCR_BAUD_UNKNOWN 0 83 #define SPCR_BAUD_9600 3 84 #define SPCR_BAUD_19200 4 85 #define SPCR_BAUD_57600 6 86 #define SPCR_BAUD_115200 7 87 88 extern struct bus_space arm_generic_bs_tag; 89 extern struct bus_space arm_generic_a4x_bs_tag; 90 91 #if NPLCOM > 0 92 static struct plcom_instance plcom_console; 93 #endif 94 95 static const struct pmap_devmap * 96 acpi_platform_devmap(void) 97 { 98 static const struct pmap_devmap devmap[] = { 99 DEVMAP_ENTRY_END 100 }; 101 102 return devmap; 103 } 104 105 static void 106 acpi_platform_bootstrap(void) 107 { 108 } 109 110 static void 111 acpi_platform_startup(void) 112 { 113 ACPI_TABLE_SPCR *spcr; 114 ACPI_TABLE_FADT *fadt; 115 ACPI_TABLE_MADT *madt; 116 int baud_rate; 117 118 /* 119 * Setup serial console device 120 */ 121 if (ACPI_SUCCESS(acpi_table_find(ACPI_SIG_SPCR, (void **)&spcr))) { 122 123 switch (spcr->BaudRate) { 124 case SPCR_BAUD_9600: 125 baud_rate = 9600; 126 break; 127 case SPCR_BAUD_19200: 128 baud_rate = 19200; 129 break; 130 case SPCR_BAUD_57600: 131 baud_rate = 57600; 132 break; 133 case SPCR_BAUD_115200: 134 case SPCR_BAUD_UNKNOWN: 135 default: 136 baud_rate = 115200; 137 break; 138 } 139 140 if (spcr->SerialPort.SpaceId == ACPI_ADR_SPACE_SYSTEM_MEMORY && 141 spcr->SerialPort.Address != 0) { 142 switch (spcr->InterfaceType) { 143 #if NPLCOM > 0 144 case SPCR_INTERFACE_TYPE_PL011: 145 case SPCR_INTERFACE_TYPE_SBSA_32BIT: 146 case SPCR_INTERFACE_TYPE_SBSA_GENERIC: 147 plcom_console.pi_type = PLCOM_TYPE_PL011; 148 plcom_console.pi_iot = &arm_generic_bs_tag; 149 plcom_console.pi_iobase = spcr->SerialPort.Address; 150 plcom_console.pi_size = PL011COM_UART_SIZE; 151 if (spcr->InterfaceType == SPCR_INTERFACE_TYPE_SBSA_32BIT) { 152 plcom_console.pi_flags = PLC_FLAG_32BIT_ACCESS; 153 } else { 154 plcom_console.pi_flags = ACPI_ACCESS_BIT_WIDTH(spcr->SerialPort.AccessWidth) == 8 ? 155 0 : PLC_FLAG_32BIT_ACCESS; 156 } 157 158 plcomcnattach(&plcom_console, baud_rate, 0, TTYDEF_CFLAG, -1); 159 break; 160 #endif 161 #if NCOM > 0 162 case SPCR_INTERFACE_TYPE_BCM2835: 163 comcnattach(&arm_generic_a4x_bs_tag, spcr->SerialPort.Address + 0x40, baud_rate, -1, 164 COM_TYPE_BCMAUXUART, TTYDEF_CFLAG); 165 cn_set_magic("+++++"); 166 break; 167 #endif 168 default: 169 printf("SPCR: kernel does not support interface type %#x\n", spcr->InterfaceType); 170 break; 171 } 172 } 173 acpi_table_unmap((ACPI_TABLE_HEADER *)spcr); 174 } 175 176 /* 177 * Initialize PSCI 0.2+ if implemented 178 */ 179 if (ACPI_SUCCESS(acpi_table_find(ACPI_SIG_FADT, (void **)&fadt))) { 180 if (fadt->ArmBootFlags & ACPI_FADT_PSCI_COMPLIANT) { 181 if (fadt->ArmBootFlags & ACPI_FADT_PSCI_USE_HVC) { 182 psci_init(psci_call_hvc); 183 } else { 184 psci_init(psci_call_smc); 185 } 186 } 187 acpi_table_unmap((ACPI_TABLE_HEADER *)fadt); 188 } 189 190 /* 191 * Count CPUs 192 */ 193 if (ACPI_SUCCESS(acpi_table_find(ACPI_SIG_MADT, (void **)&madt))) { 194 char *end = (char *)madt + madt->Header.Length; 195 char *where = (char *)madt + sizeof(ACPI_TABLE_MADT); 196 while (where < end) { 197 ACPI_SUBTABLE_HEADER *subtable = (ACPI_SUBTABLE_HEADER *)where; 198 if (subtable->Type == ACPI_MADT_TYPE_GENERIC_INTERRUPT) 199 arm_cpu_max++; 200 where += subtable->Length; 201 } 202 acpi_table_unmap((ACPI_TABLE_HEADER *)madt); 203 } 204 } 205 206 static void 207 acpi_platform_init_attach_args(struct fdt_attach_args *faa) 208 { 209 extern struct arm32_bus_dma_tag arm_generic_dma_tag; 210 extern struct bus_space arm_generic_bs_tag; 211 extern struct bus_space arm_generic_a4x_bs_tag; 212 213 faa->faa_bst = &arm_generic_bs_tag; 214 faa->faa_a4x_bst = &arm_generic_a4x_bs_tag; 215 faa->faa_dmat = &arm_generic_dma_tag; 216 } 217 218 static void 219 acpi_platform_device_register(device_t self, void *aux) 220 { 221 } 222 223 static void 224 acpi_platform_reset(void) 225 { 226 #ifdef EFI_RUNTIME 227 if (arm_efirt_reset(EFI_RESET_COLD) == 0) 228 return; 229 #endif 230 if (psci_available()) 231 psci_system_reset(); 232 } 233 234 static u_int 235 acpi_platform_uart_freq(void) 236 { 237 return 0; 238 } 239 240 static const struct arm_platform acpi_platform = { 241 .ap_devmap = acpi_platform_devmap, 242 .ap_bootstrap = acpi_platform_bootstrap, 243 .ap_startup = acpi_platform_startup, 244 .ap_init_attach_args = acpi_platform_init_attach_args, 245 .ap_device_register = acpi_platform_device_register, 246 .ap_reset = acpi_platform_reset, 247 .ap_delay = gtmr_delay, 248 .ap_uart_freq = acpi_platform_uart_freq, 249 }; 250 251 ARM_PLATFORM(virt, "netbsd,generic-acpi", &acpi_platform); 252
Indexes created Fri Oct 03 02:09:57 GMT 2025