acpi_platform.c revision 1.5
1 /* $NetBSD: acpi_platform.c,v 1.5 2018/10/28 10:21:42 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 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: acpi_platform.c,v 1.5 2018/10/28 10:21:42 jmcneill 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 static struct plcom_instance plcom_console; 92 93 static const struct pmap_devmap * 94 acpi_platform_devmap(void) 95 { 96 static const struct pmap_devmap devmap[] = { 97 DEVMAP_ENTRY_END 98 }; 99 100 return devmap; 101 } 102 103 static void 104 acpi_platform_bootstrap(void) 105 { 106 } 107 108 static void 109 acpi_platform_startup(void) 110 { 111 ACPI_TABLE_SPCR *spcr; 112 ACPI_TABLE_FADT *fadt; 113 ACPI_TABLE_MADT *madt; 114 int baud_rate; 115 116 /* 117 * Setup serial console device 118 */ 119 if (ACPI_SUCCESS(acpi_table_find(ACPI_SIG_SPCR, (void **)&spcr))) { 120 121 switch (spcr->BaudRate) { 122 case SPCR_BAUD_9600: 123 baud_rate = 9600; 124 break; 125 case SPCR_BAUD_19200: 126 baud_rate = 19200; 127 break; 128 case SPCR_BAUD_57600: 129 baud_rate = 57600; 130 break; 131 case SPCR_BAUD_115200: 132 case SPCR_BAUD_UNKNOWN: 133 default: 134 baud_rate = 115200; 135 break; 136 } 137 138 if (spcr->SerialPort.SpaceId == ACPI_ADR_SPACE_SYSTEM_MEMORY && 139 spcr->SerialPort.Address != 0) { 140 switch (spcr->InterfaceType) { 141 #if NPLCOM > 0 142 case SPCR_INTERFACE_TYPE_PL011: 143 case SPCR_INTERFACE_TYPE_SBSA_32BIT: 144 case SPCR_INTERFACE_TYPE_SBSA_GENERIC: 145 plcom_console.pi_type = PLCOM_TYPE_PL011; 146 plcom_console.pi_iot = &arm_generic_bs_tag; 147 plcom_console.pi_iobase = spcr->SerialPort.Address; 148 plcom_console.pi_size = PL011COM_UART_SIZE; 149 if (spcr->InterfaceType == SPCR_INTERFACE_TYPE_SBSA_32BIT) { 150 plcom_console.pi_flags = PLC_FLAG_32BIT_ACCESS; 151 } else { 152 plcom_console.pi_flags = ACPI_ACCESS_BIT_WIDTH(spcr->SerialPort.AccessWidth) == 8 ? 153 0 : PLC_FLAG_32BIT_ACCESS; 154 } 155 156 plcomcnattach(&plcom_console, baud_rate, 0, TTYDEF_CFLAG, -1); 157 break; 158 #endif 159 #if NCOM > 0 160 case SPCR_INTERFACE_TYPE_BCM2835: 161 comcnattach(&arm_generic_a4x_bs_tag, spcr->SerialPort.Address + 0x40, baud_rate, -1, 162 COM_TYPE_BCMAUXUART, TTYDEF_CFLAG); 163 cn_set_magic("+++++"); 164 break; 165 #endif 166 default: 167 printf("SPCR: kernel does not support interface type %#x\n", spcr->InterfaceType); 168 break; 169 } 170 } 171 acpi_table_unmap((ACPI_TABLE_HEADER *)spcr); 172 } 173 174 /* 175 * Initialize PSCI 0.2+ if implemented 176 */ 177 if (ACPI_SUCCESS(acpi_table_find(ACPI_SIG_FADT, (void **)&fadt))) { 178 if (fadt->ArmBootFlags & ACPI_FADT_PSCI_COMPLIANT) { 179 if (fadt->ArmBootFlags & ACPI_FADT_PSCI_USE_HVC) { 180 psci_init(psci_call_hvc); 181 } else { 182 psci_init(psci_call_smc); 183 } 184 } 185 acpi_table_unmap((ACPI_TABLE_HEADER *)fadt); 186 } 187 188 /* 189 * Count CPUs 190 */ 191 if (ACPI_SUCCESS(acpi_table_find(ACPI_SIG_MADT, (void **)&madt))) { 192 char *end = (char *)madt + madt->Header.Length; 193 char *where = (char *)madt + sizeof(ACPI_TABLE_MADT); 194 while (where < end) { 195 ACPI_SUBTABLE_HEADER *subtable = (ACPI_SUBTABLE_HEADER *)where; 196 if (subtable->Type == ACPI_MADT_TYPE_GENERIC_INTERRUPT) 197 arm_cpu_max++; 198 where += subtable->Length; 199 } 200 acpi_table_unmap((ACPI_TABLE_HEADER *)madt); 201 } 202 } 203 204 static void 205 acpi_platform_init_attach_args(struct fdt_attach_args *faa) 206 { 207 extern struct arm32_bus_dma_tag arm_generic_dma_tag; 208 extern struct bus_space arm_generic_bs_tag; 209 extern struct bus_space arm_generic_a4x_bs_tag; 210 211 faa->faa_bst = &arm_generic_bs_tag; 212 faa->faa_a4x_bst = &arm_generic_a4x_bs_tag; 213 faa->faa_dmat = &arm_generic_dma_tag; 214 } 215 216 static void 217 acpi_platform_early_putchar(char c) 218 { 219 } 220 221 static void 222 acpi_platform_device_register(device_t self, void *aux) 223 { 224 } 225 226 static void 227 acpi_platform_reset(void) 228 { 229 #ifdef EFI_RUNTIME 230 if (arm_efirt_reset(EFI_RESET_COLD) == 0) 231 return; 232 #endif 233 if (psci_available()) 234 psci_system_reset(); 235 } 236 237 static u_int 238 acpi_platform_uart_freq(void) 239 { 240 return 0; 241 } 242 243 static const struct arm_platform acpi_platform = { 244 .ap_devmap = acpi_platform_devmap, 245 .ap_bootstrap = acpi_platform_bootstrap, 246 .ap_startup = acpi_platform_startup, 247 .ap_init_attach_args = acpi_platform_init_attach_args, 248 .ap_early_putchar = acpi_platform_early_putchar, 249 .ap_device_register = acpi_platform_device_register, 250 .ap_reset = acpi_platform_reset, 251 .ap_delay = gtmr_delay, 252 .ap_uart_freq = acpi_platform_uart_freq, 253 }; 254 255 ARM_PLATFORM(virt, "netbsd,generic-acpi", &acpi_platform); 256
Indexes created Tue Sep 23 20:09:58 GMT 2025