arm_platform.c revision 1.2.6.2
1 1.2.6.2 martin /* $NetBSD: arm_platform.c,v 1.2.6.2 2020/04/08 14:07:29 martin Exp $ */ 2 1.2.6.2 martin 3 1.2.6.2 martin /*- 4 1.2.6.2 martin * Copyright (c) 2020 Jared McNeill <jmcneill (at) invisible.ca> 5 1.2.6.2 martin * All rights reserved. 6 1.2.6.2 martin * 7 1.2.6.2 martin * Redistribution and use in source and binary forms, with or without 8 1.2.6.2 martin * modification, are permitted provided that the following conditions 9 1.2.6.2 martin * are met: 10 1.2.6.2 martin * 1. Redistributions of source code must retain the above copyright 11 1.2.6.2 martin * notice, this list of conditions and the following disclaimer. 12 1.2.6.2 martin * 2. Redistributions in binary form must reproduce the above copyright 13 1.2.6.2 martin * notice, this list of conditions and the following disclaimer in the 14 1.2.6.2 martin * documentation and/or other materials provided with the distribution. 15 1.2.6.2 martin * 16 1.2.6.2 martin * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 1.2.6.2 martin * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 1.2.6.2 martin * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 1.2.6.2 martin * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 1.2.6.2 martin * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 1.2.6.2 martin * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 1.2.6.2 martin * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 1.2.6.2 martin * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 1.2.6.2 martin * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.2.6.2 martin * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.2.6.2 martin * SUCH DAMAGE. 27 1.2.6.2 martin */ 28 1.2.6.2 martin 29 1.2.6.2 martin /* 30 1.2.6.2 martin * This is the default Arm FDT platform implementation. It assumes the 31 1.2.6.2 martin * following: 32 1.2.6.2 martin * 33 1.2.6.2 martin * - Generic timer 34 1.2.6.2 martin * - PSCI support 35 1.2.6.2 martin * - Console UART is pre-configured by firmware 36 1.2.6.2 martin */ 37 1.2.6.2 martin 38 1.2.6.2 martin #include <sys/cdefs.h> 39 1.2.6.2 martin __KERNEL_RCSID(0, "$NetBSD: arm_platform.c,v 1.2.6.2 2020/04/08 14:07:29 martin Exp $"); 40 1.2.6.2 martin 41 1.2.6.2 martin #include <sys/param.h> 42 1.2.6.2 martin #include <sys/bus.h> 43 1.2.6.2 martin #include <sys/cpu.h> 44 1.2.6.2 martin #include <sys/device.h> 45 1.2.6.2 martin #include <sys/termios.h> 46 1.2.6.2 martin 47 1.2.6.2 martin #include <dev/fdt/fdtvar.h> 48 1.2.6.2 martin #include <arm/fdt/arm_fdtvar.h> 49 1.2.6.2 martin 50 1.2.6.2 martin #include <uvm/uvm_extern.h> 51 1.2.6.2 martin 52 1.2.6.2 martin #include <machine/bootconfig.h> 53 1.2.6.2 martin 54 1.2.6.2 martin #include <arm/cpufunc.h> 55 1.2.6.2 martin 56 1.2.6.2 martin #include <arm/cortex/gtmr_var.h> 57 1.2.6.2 martin 58 1.2.6.2 martin #include <arm/arm/psci.h> 59 1.2.6.2 martin #include <arm/fdt/psci_fdtvar.h> 60 1.2.6.2 martin 61 1.2.6.2 martin #include <libfdt.h> 62 1.2.6.2 martin 63 1.2.6.2 martin #include <arch/evbarm/fdt/platform.h> 64 1.2.6.2 martin 65 1.2.6.2 martin extern struct arm32_bus_dma_tag arm_generic_dma_tag; 66 1.2.6.2 martin extern struct bus_space arm_generic_bs_tag; 67 1.2.6.2 martin extern struct bus_space arm_generic_a4x_bs_tag; 68 1.2.6.2 martin 69 1.2.6.2 martin static void 70 1.2.6.2 martin arm_platform_init_attach_args(struct fdt_attach_args *faa) 71 1.2.6.2 martin { 72 1.2.6.2 martin faa->faa_bst = &arm_generic_bs_tag; 73 1.2.6.2 martin faa->faa_a4x_bst = &arm_generic_a4x_bs_tag; 74 1.2.6.2 martin faa->faa_dmat = &arm_generic_dma_tag; 75 1.2.6.2 martin } 76 1.2.6.2 martin 77 1.2.6.2 martin static void 78 1.2.6.2 martin arm_platform_device_register(device_t self, void *aux) 79 1.2.6.2 martin { 80 1.2.6.2 martin } 81 1.2.6.2 martin 82 1.2.6.2 martin static const struct pmap_devmap * 83 1.2.6.2 martin arm_platform_devmap(void) 84 1.2.6.2 martin { 85 1.2.6.2 martin static const struct pmap_devmap devmap_empty[] = { 86 1.2.6.2 martin DEVMAP_ENTRY_END 87 1.2.6.2 martin }; 88 1.2.6.2 martin static struct pmap_devmap devmap_uart[] = { 89 1.2.6.2 martin DEVMAP_ENTRY(KERNEL_IO_VBASE, 0, PAGE_SIZE), 90 1.2.6.2 martin DEVMAP_ENTRY_END 91 1.2.6.2 martin }; 92 1.2.6.2 martin bus_addr_t uart_base; 93 1.2.6.2 martin 94 1.2.6.2 martin const int phandle = fdtbus_get_stdout_phandle(); 95 1.2.6.2 martin if (phandle <= 0) 96 1.2.6.2 martin return devmap_empty; 97 1.2.6.2 martin 98 1.2.6.2 martin if (fdtbus_get_reg(phandle, 0, &uart_base, NULL) != 0) 99 1.2.6.2 martin return devmap_empty; 100 1.2.6.2 martin 101 1.2.6.2 martin devmap_uart[0].pd_pa = DEVMAP_ALIGN(uart_base); 102 1.2.6.2 martin 103 1.2.6.2 martin return devmap_uart; 104 1.2.6.2 martin } 105 1.2.6.2 martin 106 1.2.6.2 martin static u_int 107 1.2.6.2 martin arm_platform_uart_freq(void) 108 1.2.6.2 martin { 109 1.2.6.2 martin return 0; 110 1.2.6.2 martin } 111 1.2.6.2 martin 112 1.2.6.2 martin static const struct arm_platform arm_platform = { 113 1.2.6.2 martin .ap_devmap = arm_platform_devmap, 114 1.2.6.2 martin .ap_bootstrap = arm_fdt_cpu_bootstrap, 115 1.2.6.2 martin .ap_init_attach_args = arm_platform_init_attach_args, 116 1.2.6.2 martin .ap_device_register = arm_platform_device_register, 117 1.2.6.2 martin .ap_reset = psci_fdt_reset, 118 1.2.6.2 martin .ap_delay = gtmr_delay, 119 1.2.6.2 martin .ap_uart_freq = arm_platform_uart_freq, 120 1.2.6.2 martin .ap_mpstart = arm_fdt_cpu_mpstart, 121 1.2.6.2 martin }; 122 1.2.6.2 martin 123 1.2.6.2 martin ARM_PLATFORM(arm, ARM_PLATFORM_DEFAULT, &arm_platform); 124
Indexes created Thu Oct 02 14:10:14 GMT 2025