2 * Copyright 2014 Svatopluk Kraus <onwahe@gmail.com>
3 * Copyright 2014 Michal Meloun <meloun@miracle.cz>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
32 #include <sys/systm.h>
34 #include <machine/cpuinfo.h>
35 #include <machine/cpu-v6.h>
37 struct cpuinfo cpuinfo;
39 /* Read and parse CPU id scheme */
44 cpuinfo.midr = cp15_midr_get();
45 /* Test old version id schemes first */
46 if ((cpuinfo.midr & CPU_ID_IMPLEMENTOR_MASK) == CPU_ID_ARM_LTD) {
47 if (CPU_ID_ISOLD(cpuinfo.midr)) {
48 /* obsolete ARMv2 or ARMv3 CPU */
52 if (CPU_ID_IS7(cpuinfo.midr)) {
53 if ((cpuinfo.midr & (1 << 23)) == 0) {
54 /* obsolete ARMv3 CPU */
59 cpuinfo.architecture = 1;
60 cpuinfo.revision = (cpuinfo.midr >> 16) & 0x7F;
62 /* ARM new id scheme */
63 cpuinfo.architecture = (cpuinfo.midr >> 16) & 0x0F;
64 cpuinfo.revision = (cpuinfo.midr >> 20) & 0x0F;
67 /* non ARM -> must be new id scheme */
68 cpuinfo.architecture = (cpuinfo.midr >> 16) & 0x0F;
69 cpuinfo.revision = (cpuinfo.midr >> 20) & 0x0F;
71 /* Parse rest of MIDR */
72 cpuinfo.implementer = (cpuinfo.midr >> 24) & 0xFF;
73 cpuinfo.part_number = (cpuinfo.midr >> 4) & 0xFFF;
74 cpuinfo.patch = cpuinfo.midr & 0x0F;
76 /* CP15 c0,c0 regs 0-7 exist on all CPUs (although aliased with MIDR) */
77 cpuinfo.ctr = cp15_ctr_get();
78 cpuinfo.tcmtr = cp15_tcmtr_get();
79 cpuinfo.tlbtr = cp15_tlbtr_get();
80 cpuinfo.mpidr = cp15_mpidr_get();
81 cpuinfo.revidr = cp15_revidr_get();
83 /* if CPU is not v7 cpu id scheme */
84 if (cpuinfo.architecture != 0xF)
87 cpuinfo.id_pfr0 = cp15_id_pfr0_get();
88 cpuinfo.id_pfr1 = cp15_id_pfr1_get();
89 cpuinfo.id_dfr0 = cp15_id_dfr0_get();
90 cpuinfo.id_afr0 = cp15_id_afr0_get();
91 cpuinfo.id_mmfr0 = cp15_id_mmfr0_get();
92 cpuinfo.id_mmfr1 = cp15_id_mmfr1_get();
93 cpuinfo.id_mmfr2 = cp15_id_mmfr2_get();
94 cpuinfo.id_mmfr3 = cp15_id_mmfr3_get();
95 cpuinfo.id_isar0 = cp15_id_isar0_get();
96 cpuinfo.id_isar1 = cp15_id_isar1_get();
97 cpuinfo.id_isar2 = cp15_id_isar2_get();
98 cpuinfo.id_isar3 = cp15_id_isar3_get();
99 cpuinfo.id_isar4 = cp15_id_isar4_get();
100 cpuinfo.id_isar5 = cp15_id_isar5_get();
102 /* Not yet - CBAR only exist on ARM SMP Cortex A CPUs
103 cpuinfo.cbar = cp15_cbar_get();
106 /* Test if revidr is implemented */
107 if (cpuinfo.revidr == cpuinfo.midr)
110 /* parsed bits of above registers */
112 cpuinfo.outermost_shareability = (cpuinfo.id_mmfr0 >> 8) & 0xF;
113 cpuinfo.shareability_levels = (cpuinfo.id_mmfr0 >> 12) & 0xF;
114 cpuinfo.auxiliary_registers = (cpuinfo.id_mmfr0 >> 20) & 0xF;
115 cpuinfo.innermost_shareability = (cpuinfo.id_mmfr0 >> 28) & 0xF;
117 cpuinfo.mem_barrier = (cpuinfo.id_mmfr2 >> 20) & 0xF;
119 cpuinfo.coherent_walk = (cpuinfo.id_mmfr3 >> 20) & 0xF;
120 cpuinfo.maintenance_broadcast =(cpuinfo.id_mmfr3 >> 12) & 0xF;
122 cpuinfo.generic_timer_ext = (cpuinfo.id_pfr1 >> 16) & 0xF;
123 cpuinfo.virtualization_ext = (cpuinfo.id_pfr1 >> 12) & 0xF;
124 cpuinfo.security_ext = (cpuinfo.id_pfr1 >> 4) & 0xF;