1 /*- 2 * Copyright (c) 2015-2016 Ruslan Bukin <br@bsdpad.com> 3 * All rights reserved. 4 * 5 * Portions of this software were developed by SRI International and the 6 * University of Cambridge Computer Laboratory under DARPA/AFRL contract 7 * FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme. 8 * 9 * Portions of this software were developed by the University of Cambridge 10 * Computer Laboratory as part of the CTSRD Project, with support from the 11 * UK Higher Education Innovation Fund (HEIF). 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <sys/param.h> 39 #include <sys/pcpu.h> 40 #include <sys/sysctl.h> 41 #include <sys/systm.h> 42 43 #include <machine/cpu.h> 44 #include <machine/cpufunc.h> 45 #include <machine/trap.h> 46 47 char machine[] = "riscv"; 48 49 SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, 50 "Machine class"); 51 52 struct cpu_desc { 53 u_int cpu_impl; 54 u_int cpu_part_num; 55 const char *cpu_impl_name; 56 const char *cpu_part_name; 57 }; 58 59 struct cpu_desc cpu_desc[MAXCPU]; 60 61 struct cpu_parts { 62 u_int part_id; 63 const char *part_name; 64 }; 65 #define CPU_PART_NONE { -1, "Unknown Processor" } 66 67 struct cpu_implementers { 68 u_int impl_id; 69 const char *impl_name; 70 }; 71 #define CPU_IMPLEMENTER_NONE { 0, "Unknown Implementer" } 72 73 /* 74 * CPU base 75 */ 76 static const struct cpu_parts cpu_parts_std[] = { 77 { CPU_PART_RV32, "RV32" }, 78 { CPU_PART_RV64, "RV64" }, 79 { CPU_PART_RV128, "RV128" }, 80 CPU_PART_NONE, 81 }; 82 83 /* 84 * Implementers table. 85 */ 86 const struct cpu_implementers cpu_implementers[] = { 87 { CPU_IMPL_UCB_ROCKET, "UC Berkeley Rocket" }, 88 CPU_IMPLEMENTER_NONE, 89 }; 90 91 void 92 identify_cpu(void) 93 { 94 const struct cpu_parts *cpu_partsp; 95 uint32_t part_id; 96 uint32_t impl_id; 97 uint64_t mimpid; 98 uint64_t misa; 99 u_int cpu; 100 size_t i; 101 102 cpu_partsp = NULL; 103 104 /* TODO: can we get mimpid and misa somewhere ? */ 105 mimpid = 0; 106 misa = 0; 107 108 cpu = PCPU_GET(cpuid); 109 110 impl_id = CPU_IMPL(mimpid); 111 for (i = 0; i < nitems(cpu_implementers); i++) { 112 if (impl_id == cpu_implementers[i].impl_id || 113 cpu_implementers[i].impl_id == 0) { 114 cpu_desc[cpu].cpu_impl = impl_id; 115 cpu_desc[cpu].cpu_impl_name = cpu_implementers[i].impl_name; 116 cpu_partsp = cpu_parts_std; 117 break; 118 } 119 } 120 121 part_id = CPU_PART(misa); 122 for (i = 0; &cpu_partsp[i] != NULL; i++) { 123 if (part_id == cpu_partsp[i].part_id || 124 cpu_partsp[i].part_id == -1) { 125 cpu_desc[cpu].cpu_part_num = part_id; 126 cpu_desc[cpu].cpu_part_name = cpu_partsp[i].part_name; 127 break; 128 } 129 } 130 131 /* Print details for boot CPU or if we want verbose output */ 132 if (cpu == 0 || bootverbose) { 133 printf("CPU(%d): %s %s\n", cpu, 134 cpu_desc[cpu].cpu_impl_name, 135 cpu_desc[cpu].cpu_part_name); 136 } 137 } 138