1 /* $NetBSD: arm_platform.c,v 1.4 2021/02/04 22:36:53 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2020 Jared McNeill <jmcneill@invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 /* 30 * This is the default Arm FDT platform implementation. It assumes the 31 * following: 32 * 33 * - Generic timer 34 * - PSCI support 35 * - Console UART is pre-configured by firmware 36 */ 37 38 #include <sys/cdefs.h> 39 __KERNEL_RCSID(0, "$NetBSD: arm_platform.c,v 1.4 2021/02/04 22:36:53 thorpej Exp $"); 40 41 #include <sys/param.h> 42 #include <sys/bus.h> 43 #include <sys/cpu.h> 44 #include <sys/device.h> 45 #include <sys/termios.h> 46 47 #include <dev/fdt/fdtvar.h> 48 #include <arm/fdt/arm_fdtvar.h> 49 50 #include <uvm/uvm_extern.h> 51 52 #include <machine/bootconfig.h> 53 54 #include <arm/cpufunc.h> 55 56 #include <arm/cortex/gtmr_var.h> 57 58 #include <arm/arm/psci.h> 59 #include <arm/fdt/psci_fdtvar.h> 60 61 #include <libfdt.h> 62 63 #include <arch/evbarm/fdt/platform.h> 64 65 extern struct arm32_bus_dma_tag arm_generic_dma_tag; 66 extern struct bus_space arm_generic_bs_tag; 67 68 static void 69 arm_platform_init_attach_args(struct fdt_attach_args *faa) 70 { 71 faa->faa_bst = &arm_generic_bs_tag; 72 faa->faa_dmat = &arm_generic_dma_tag; 73 } 74 75 static void 76 arm_platform_device_register(device_t self, void *aux) 77 { 78 fdtbus_device_register(self, aux); 79 } 80 81 static const struct pmap_devmap * 82 arm_platform_devmap(void) 83 { 84 static const struct pmap_devmap devmap_empty[] = { 85 DEVMAP_ENTRY_END 86 }; 87 static struct pmap_devmap devmap_uart[] = { 88 DEVMAP_ENTRY(KERNEL_IO_VBASE, 0, PAGE_SIZE), 89 DEVMAP_ENTRY_END 90 }; 91 bus_addr_t uart_base; 92 93 const int phandle = fdtbus_get_stdout_phandle(); 94 if (phandle <= 0) 95 return devmap_empty; 96 97 if (fdtbus_get_reg(phandle, 0, &uart_base, NULL) != 0) 98 return devmap_empty; 99 100 devmap_uart[0].pd_pa = DEVMAP_ALIGN(uart_base); 101 102 return devmap_uart; 103 } 104 105 static u_int 106 arm_platform_uart_freq(void) 107 { 108 return 0; 109 } 110 111 static const struct arm_platform arm_platform = { 112 .ap_devmap = arm_platform_devmap, 113 .ap_bootstrap = arm_fdt_cpu_bootstrap, 114 .ap_init_attach_args = arm_platform_init_attach_args, 115 .ap_device_register = arm_platform_device_register, 116 .ap_reset = psci_fdt_reset, 117 .ap_delay = gtmr_delay, 118 .ap_uart_freq = arm_platform_uart_freq, 119 .ap_mpstart = arm_fdt_cpu_mpstart, 120 }; 121 122 ARM_PLATFORM(arm, ARM_PLATFORM_DEFAULT, &arm_platform); 123