1 /* $NetBSD: mainbus.c,v 1.7 2017/05/21 06:49:12 skrll Exp $ */ 2 3 /*- 4 * Copyright (c) 2014 Michael Lorenz 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: mainbus.c,v 1.7 2017/05/21 06:49:12 skrll Exp $"); 31 32 #include "opt_multiprocessor.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/device.h> 37 38 #include <mips/cache.h> 39 #include <mips/cpuregs.h> 40 41 #include <mips/ingenic/ingenic_regs.h> 42 43 #include "opt_ingenic.h" 44 45 #include "locators.h" 46 47 static int mainbus_match(device_t, cfdata_t, void *); 48 static void mainbus_attach(device_t, device_t, void *); 49 static int mainbus_print(void *, const char *); 50 51 CFATTACH_DECL_NEW(mainbus, 0, 52 mainbus_match, mainbus_attach, NULL, NULL); 53 54 /* There can be only one. */ 55 int mainbus_found = 0; 56 57 struct mainbusdev { 58 const char *md_name; 59 }; 60 61 struct mainbusdev mainbusdevs[] = { 62 { "cpu", }, 63 #ifdef MULTIPROCESSOR 64 { "cpu", }, 65 #endif 66 { "apbus", }, 67 { NULL, } 68 }; 69 70 static int 71 mainbus_match(device_t parent, cfdata_t match, void *aux) 72 { 73 74 if (mainbus_found) 75 return (0); 76 77 return (1); 78 } 79 80 static void 81 mainbus_attach(device_t parent, device_t self, void *aux) 82 { 83 const struct mainbusdev *md; 84 85 mainbus_found = 1; 86 printf("\n"); 87 88 for (md = mainbusdevs; md->md_name != NULL; md++) { 89 struct mainbusdev ma = *md; 90 config_found_ia(self, "mainbus", &ma, mainbus_print); 91 } 92 93 #ifdef INGENIC_DEBUG 94 printf("TFR: %08x\n", readreg(JZ_TC_TFR)); 95 printf("TMR: %08x\n", readreg(JZ_TC_TMR)); 96 97 /* send ourselves an IPI */ 98 mips_cp0_corembox_write(0x12345678, 0); 99 delay(1000); 100 101 /* send the other core an IPI */ 102 mips_cp0_corembox_write(0x12345678, 1); 103 delay(1000); 104 #endif 105 } 106 107 static int 108 mainbus_print(void *aux, const char *pnp) 109 { 110 111 return (QUIET); 112 } 113