acpi_platform.c revision 1.3
1 /* $NetBSD: acpi_platform.c,v 1.3 2018/10/15 20:09:06 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 <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: acpi_platform.c,v 1.3 2018/10/15 20:09:06 jmcneill Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/bus.h> 37 #include <sys/cpu.h> 38 #include <sys/device.h> 39 #include <sys/termios.h> 40 41 #include <dev/fdt/fdtvar.h> 42 #include <arm/fdt/arm_fdtvar.h> 43 44 #include <uvm/uvm_extern.h> 45 46 #include <machine/bootconfig.h> 47 #include <arm/cpufunc.h> 48 #include <arm/locore.h> 49 50 #include <arm/cortex/gtmr_var.h> 51 52 #include <arm/arm/psci.h> 53 #include <arm/fdt/psci_fdtvar.h> 54 55 #include <evbarm/fdt/platform.h> 56 57 #include <evbarm/dev/plcomreg.h> 58 #include <evbarm/dev/plcomvar.h> 59 #include <dev/ic/ns16550reg.h> 60 #include <dev/ic/comreg.h> 61 62 #include <dev/acpi/acpireg.h> 63 #include <dev/acpi/acpivar.h> 64 #include <arch/arm/acpi/acpi_table.h> 65 66 #define SPCR_INTERFACE_TYPE_PL011 0x0003 67 #define SPCR_INTERFACE_TYPE_SBSA_32BIT 0x000d 68 #define SPCR_INTERFACE_TYPE_SBSA_GENERIC 0x000e 69 #define SPCR_INTERFACE_TYPE_BCM2835 0x0010 70 71 #define SPCR_BAUD_UNKNOWN 0 72 #define SPCR_BAUD_9600 3 73 #define SPCR_BAUD_19200 4 74 #define SPCR_BAUD_57600 6 75 #define SPCR_BAUD_115200 7 76 77 extern struct bus_space arm_generic_bs_tag; 78 79 static struct plcom_instance plcom_console; 80 81 static const struct pmap_devmap * 82 acpi_platform_devmap(void) 83 { 84 static const struct pmap_devmap devmap[] = { 85 DEVMAP_ENTRY_END 86 }; 87 88 return devmap; 89 } 90 91 static void 92 acpi_platform_bootstrap(void) 93 { 94 } 95 96 static void 97 acpi_platform_startup(void) 98 { 99 ACPI_TABLE_SPCR *spcr; 100 ACPI_TABLE_FADT *fadt; 101 ACPI_TABLE_MADT *madt; 102 int baud_rate; 103 104 /* 105 * Setup serial console device 106 */ 107 if (ACPI_SUCCESS(acpi_table_find(ACPI_SIG_SPCR, (void **)&spcr))) { 108 if (spcr->SerialPort.SpaceId == ACPI_ADR_SPACE_SYSTEM_MEMORY && 109 spcr->SerialPort.Address != 0) { 110 switch (spcr->InterfaceType) { 111 case SPCR_INTERFACE_TYPE_PL011: 112 case SPCR_INTERFACE_TYPE_SBSA_32BIT: 113 case SPCR_INTERFACE_TYPE_SBSA_GENERIC: 114 case SPCR_INTERFACE_TYPE_BCM2835: 115 plcom_console.pi_type = PLCOM_TYPE_PL011; 116 plcom_console.pi_iot = &arm_generic_bs_tag; 117 plcom_console.pi_iobase = spcr->SerialPort.Address; 118 plcom_console.pi_size = PL011COM_UART_SIZE; 119 if (spcr->InterfaceType == SPCR_INTERFACE_TYPE_SBSA_32BIT) { 120 plcom_console.pi_flags = PLC_FLAG_32BIT_ACCESS; 121 } else { 122 plcom_console.pi_flags = ACPI_ACCESS_BIT_WIDTH(spcr->SerialPort.AccessWidth) == 8 ? 123 0 : PLC_FLAG_32BIT_ACCESS; 124 } 125 switch (spcr->BaudRate) { 126 case SPCR_BAUD_9600: 127 baud_rate = 9600; 128 break; 129 case SPCR_BAUD_19200: 130 baud_rate = 19200; 131 break; 132 case SPCR_BAUD_57600: 133 baud_rate = 57600; 134 break; 135 case SPCR_BAUD_115200: 136 case SPCR_BAUD_UNKNOWN: 137 default: 138 baud_rate = 115200; 139 break; 140 } 141 142 plcomcnattach(&plcom_console, baud_rate, 0, TTYDEF_CFLAG, -1); 143 break; 144 } 145 } 146 acpi_table_unmap((ACPI_TABLE_HEADER *)spcr); 147 } 148 149 /* 150 * Initialize PSCI 0.2+ if implemented 151 */ 152 if (ACPI_SUCCESS(acpi_table_find(ACPI_SIG_FADT, (void **)&fadt))) { 153 if (fadt->ArmBootFlags & ACPI_FADT_PSCI_COMPLIANT) { 154 if (fadt->ArmBootFlags & ACPI_FADT_PSCI_USE_HVC) { 155 psci_init(psci_call_hvc); 156 } else { 157 psci_init(psci_call_smc); 158 } 159 } 160 acpi_table_unmap((ACPI_TABLE_HEADER *)fadt); 161 } 162 163 /* 164 * Count CPUs 165 */ 166 if (ACPI_SUCCESS(acpi_table_find(ACPI_SIG_MADT, (void **)&madt))) { 167 char *end = (char *)madt + madt->Header.Length; 168 char *where = (char *)madt + sizeof(ACPI_TABLE_MADT); 169 while (where < end) { 170 ACPI_SUBTABLE_HEADER *subtable = (ACPI_SUBTABLE_HEADER *)where; 171 if (subtable->Type == ACPI_MADT_TYPE_GENERIC_INTERRUPT) 172 arm_cpu_max++; 173 where += subtable->Length; 174 } 175 acpi_table_unmap((ACPI_TABLE_HEADER *)madt); 176 } 177 } 178 179 static void 180 acpi_platform_init_attach_args(struct fdt_attach_args *faa) 181 { 182 extern struct arm32_bus_dma_tag arm_generic_dma_tag; 183 extern struct bus_space arm_generic_bs_tag; 184 extern struct bus_space arm_generic_a4x_bs_tag; 185 186 faa->faa_bst = &arm_generic_bs_tag; 187 faa->faa_a4x_bst = &arm_generic_a4x_bs_tag; 188 faa->faa_dmat = &arm_generic_dma_tag; 189 } 190 191 static void 192 acpi_platform_early_putchar(char c) 193 { 194 } 195 196 static void 197 acpi_platform_device_register(device_t self, void *aux) 198 { 199 } 200 201 static void 202 acpi_platform_reset(void) 203 { 204 if (psci_available()) 205 psci_system_reset(); 206 } 207 208 static u_int 209 acpi_platform_uart_freq(void) 210 { 211 return 0; 212 } 213 214 static const struct arm_platform acpi_platform = { 215 .ap_devmap = acpi_platform_devmap, 216 .ap_bootstrap = acpi_platform_bootstrap, 217 .ap_startup = acpi_platform_startup, 218 .ap_init_attach_args = acpi_platform_init_attach_args, 219 .ap_early_putchar = acpi_platform_early_putchar, 220 .ap_device_register = acpi_platform_device_register, 221 .ap_reset = acpi_platform_reset, 222 .ap_delay = gtmr_delay, 223 .ap_uart_freq = acpi_platform_uart_freq, 224 }; 225 226 ARM_PLATFORM(virt, "netbsd,generic-acpi", &acpi_platform); 227
Indexes created Tue Sep 23 14:10:03 GMT 2025