1 /*- 2 * Copyright (c) 2012 Oleksandr Tymoshenko. 3 * Copyright (c) 1994-1998 Mark Brinicombe. 4 * Copyright (c) 1994 Brini. 5 * All rights reserved. 6 * 7 * This code is derived from software written for Brini by Mark Brinicombe 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by Brini. 20 * 4. The name of the company nor the name of the author may be used to 21 * endorse or promote products derived from this software without specific 22 * prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED 25 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 28 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 29 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 30 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: FreeBSD: //depot/projects/arm/src/sys/arm/at91/kb920x_machdep.c, rev 45 37 */ 38 39 #include "opt_ddb.h" 40 #include "opt_platform.h" 41 #include "opt_global.h" 42 43 #include <sys/cdefs.h> 44 __FBSDID("$FreeBSD$"); 45 46 #define _ARM32_BUS_DMA_PRIVATE 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/bus.h> 50 51 #include <vm/vm.h> 52 #include <vm/pmap.h> 53 54 #include <machine/bus.h> 55 #include <machine/devmap.h> 56 #include <machine/machdep.h> 57 #include <machine/platform.h> 58 #include <machine/platformvar.h> 59 60 #include <dev/fdt/fdt_common.h> 61 62 #include <arm/broadcom/bcm2835/bcm2835_wdog.h> 63 64 #include "platform_if.h" 65 66 static vm_offset_t 67 bcm2835_lastaddr(platform_t plat) 68 { 69 70 return (arm_devmap_lastaddr()); 71 } 72 73 static void 74 bcm2835_late_init(platform_t plat) 75 { 76 phandle_t system; 77 pcell_t cells[2]; 78 int len; 79 80 system = OF_finddevice("/system"); 81 if (system != 0) { 82 len = OF_getprop(system, "linux,serial", &cells, sizeof(cells)); 83 if (len > 0) 84 board_set_serial(fdt64_to_cpu(*((uint64_t *)cells))); 85 86 len = OF_getprop(system, "linux,revision", &cells, sizeof(cells)); 87 if (len > 0) 88 board_set_revision(fdt32_to_cpu(*((uint32_t *)cells))); 89 } 90 } 91 92 /* 93 * Set up static device mappings. 94 * All on-chip peripherals exist in a 16MB range starting at 0x20000000. 95 * Map the entire range using 1MB section mappings. 96 */ 97 static int 98 bcm2835_devmap_init(platform_t plat) 99 { 100 101 arm_devmap_add_entry(0x20000000, 0x01000000); 102 return (0); 103 } 104 105 struct arm32_dma_range * 106 bus_dma_get_range(void) 107 { 108 109 return (NULL); 110 } 111 112 int 113 bus_dma_get_range_nb(void) 114 { 115 116 return (0); 117 } 118 119 void 120 cpu_reset() 121 { 122 bcmwd_watchdog_reset(); 123 while (1); 124 } 125 static platform_method_t bcm2835_methods[] = { 126 PLATFORMMETHOD(platform_devmap_init, bcm2835_devmap_init), 127 PLATFORMMETHOD(platform_lastaddr, bcm2835_lastaddr), 128 PLATFORMMETHOD(platform_late_init, bcm2835_late_init), 129 130 PLATFORMMETHOD_END, 131 }; 132 133 FDT_PLATFORM_DEF(bcm2835, "bcm2835", 0, "raspberrypi,model-b"); 134 135