1 /*- 2 * SPDX-License-Identifier: BSD-4-Clause 3 * 4 * Copyright (c) 2012 Oleksandr Tymoshenko. 5 * Copyright (c) 1994-1998 Mark Brinicombe. 6 * Copyright (c) 1994 Brini. 7 * All rights reserved. 8 * 9 * This code is derived from software written for Brini by Mark Brinicombe 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by Brini. 22 * 4. The name of the company nor the name of the author may be used to 23 * endorse or promote products derived from this software without specific 24 * prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED 27 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 28 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 29 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 30 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 31 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 32 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * from: FreeBSD: //depot/projects/arm/src/sys/arm/at91/kb920x_machdep.c, rev 45 39 */ 40 41 #include "opt_ddb.h" 42 #include "opt_platform.h" 43 44 #include <sys/cdefs.h> 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/bus.h> 48 #include <sys/devmap.h> 49 50 #include <vm/vm.h> 51 #include <vm/pmap.h> 52 53 #include <machine/bus.h> 54 #include <machine/machdep.h> 55 #include <machine/platform.h> 56 #include <machine/platformvar.h> 57 58 #include <dev/ofw/openfirm.h> 59 60 #include <arm/broadcom/bcm2835/bcm2835_wdog.h> 61 #include <arm/broadcom/bcm2835/bcm2836_mp.h> 62 63 #include "platform_if.h" 64 65 #ifdef SOC_BCM2835 66 static platform_devmap_init_t bcm2835_devmap_init; 67 #endif 68 #ifdef SOC_BCM2836 69 static platform_devmap_init_t bcm2836_devmap_init; 70 #endif 71 static platform_late_init_t bcm2835_late_init; 72 static platform_cpu_reset_t bcm2835_cpu_reset; 73 74 static void 75 bcm2835_late_init(platform_t plat) 76 { 77 phandle_t system; 78 pcell_t cells[2]; 79 int len; 80 81 system = OF_finddevice("/system"); 82 if (system != -1) { 83 len = OF_getencprop(system, "linux,serial", cells, 84 sizeof(cells)); 85 if (len > 0) 86 board_set_serial(((uint64_t)cells[0]) << 32 | cells[1]); 87 88 len = OF_getencprop(system, "linux,revision", cells, 89 sizeof(cells)); 90 if (len > 0) 91 board_set_revision(cells[0]); 92 } 93 } 94 95 #ifdef SOC_BCM2835 96 /* 97 * Set up static device mappings. 98 * All on-chip peripherals exist in a 16MB range starting at 0x20000000. 99 * Map the entire range using 1MB section mappings. 100 */ 101 static int 102 bcm2835_devmap_init(platform_t plat) 103 { 104 105 devmap_add_entry(0x20000000, 0x01000000); 106 return (0); 107 } 108 #endif 109 110 #ifdef SOC_BCM2836 111 static int 112 bcm2836_devmap_init(platform_t plat) 113 { 114 115 devmap_add_entry(0x3f000000, 0x01000000); 116 return (0); 117 } 118 #endif 119 120 static void 121 bcm2835_cpu_reset(platform_t plat) 122 { 123 bcmwd_watchdog_reset(); 124 } 125 126 #ifdef SOC_BCM2835 127 static platform_method_t bcm2835_methods[] = { 128 PLATFORMMETHOD(platform_devmap_init, bcm2835_devmap_init), 129 PLATFORMMETHOD(platform_late_init, bcm2835_late_init), 130 PLATFORMMETHOD(platform_cpu_reset, bcm2835_cpu_reset), 131 132 PLATFORMMETHOD_END, 133 }; 134 FDT_PLATFORM_DEF2(bcm2835, bcm2835_legacy, "bcm2835 (legacy)", 0, "raspberrypi,model-b", 100); 135 FDT_PLATFORM_DEF2(bcm2835, bcm2835, "bcm2835", 0, "brcm,bcm2835", 100); 136 #endif 137 138 #if defined(SOC_BCM2836) || defined(SOC_BRCM_BCM2837) 139 static platform_method_t bcm2836_methods[] = { 140 PLATFORMMETHOD(platform_devmap_init, bcm2836_devmap_init), 141 PLATFORMMETHOD(platform_late_init, bcm2835_late_init), 142 PLATFORMMETHOD(platform_cpu_reset, bcm2835_cpu_reset), 143 144 #ifdef SMP 145 PLATFORMMETHOD(platform_mp_start_ap, bcm2836_mp_start_ap), 146 PLATFORMMETHOD(platform_mp_setmaxid, bcm2836_mp_setmaxid), 147 #endif 148 149 PLATFORMMETHOD_END, 150 }; 151 FDT_PLATFORM_DEF2(bcm2836, bcm2836_legacy, "bcm2836 (legacy)", 0, "brcm,bcm2709", 100); 152 FDT_PLATFORM_DEF2(bcm2836, bcm2836, "bcm2836", 0, "brcm,bcm2836", 100); 153 FDT_PLATFORM_DEF2(bcm2836, bcm2837, "bcm2837", 0, "brcm,bcm2837", 100); 154 #endif /* defined(SOC_BCM2836) || defined(SOC_BRCM_BCM2837) */ 155