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| Rev | Author | Line No. | Line |
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| 2128 | jermar | 1 | /* |
| 2189 | kebrt | 2 | * Copyright (c) 2007 Michal Kebrt |
| 2128 | jermar | 3 | * All rights reserved. |
| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | /** @addtogroup arm32 |
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| 30 | * @{ |
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| 31 | */ |
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| 32 | /** @file |
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| 2357 | kebrt | 33 | * @brief CPU identification. |
| 2128 | jermar | 34 | */ |
| 35 | |||
| 2189 | kebrt | 36 | #include <arch/cpu.h> |
| 2128 | jermar | 37 | #include <cpu.h> |
| 2189 | kebrt | 38 | #include <arch.h> |
| 2128 | jermar | 39 | #include <print.h> |
| 40 | |||
| 2189 | kebrt | 41 | |
| 2329 | kebrt | 42 | /** Number of indexes left out in the #imp_data array */ |
| 43 | #define IMP_DATA_START_OFFSET 0x40 |
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| 44 | |||
| 2189 | kebrt | 45 | /** Implementators (vendor) names */ |
| 46 | static char * imp_data[] = { |
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| 2329 | kebrt | 47 | "?", /* IMP_DATA_START_OFFSET */ |
| 2189 | kebrt | 48 | "ARM Ltd", /* 0x41 */ |
| 49 | "", /* 0x42 */ |
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| 50 | "", /* 0x43 */ |
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| 51 | "Digital Equipment Corporation", /* 0x44 */ |
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| 52 | "", "", "", "", "", "", "", "", "", "", "", /* 0x4f */ |
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| 53 | "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", /* 0x5f */ |
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| 54 | "", "", "", "", "", "", "", "", "", /* 0x68 */ |
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| 55 | "Intel Corporation" /* 0x69 */ |
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| 56 | }; |
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| 57 | |||
| 2329 | kebrt | 58 | /** Length of the #imp_data array */ |
| 2189 | kebrt | 59 | static int imp_data_length = sizeof(imp_data)/sizeof(char *); |
| 60 | |||
| 61 | /** Architecture names */ |
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| 62 | static char * arch_data[] = { |
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| 63 | "?", /* 0x0 */ |
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| 64 | "4", /* 0x1 */ |
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| 65 | "4T", /* 0x2 */ |
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| 66 | "5", /* 0x3 */ |
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| 67 | "5T", /* 0x4 */ |
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| 68 | "5TE", /* 0x5 */ |
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| 69 | "5TEJ", /* 0x6 */ |
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| 70 | "6" /* 0x7 */ |
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| 71 | }; |
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| 72 | |||
| 2329 | kebrt | 73 | /** Length of the #arch_data array */ |
| 2189 | kebrt | 74 | static int arch_data_length = sizeof(arch_data)/sizeof(char *); |
| 75 | |||
| 76 | |||
| 2329 | kebrt | 77 | /** Retrieves processor identification from CP15 register 0. |
| 2189 | kebrt | 78 | * |
| 2329 | kebrt | 79 | * @param cpu Structure for storing CPU identification. |
| 2189 | kebrt | 80 | */ |
| 81 | static void arch_cpu_identify(cpu_arch_t * cpu) |
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| 2128 | jermar | 82 | { |
| 2189 | kebrt | 83 | uint32_t ident; |
| 84 | asm volatile ( |
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| 85 | "mrc p15, 0, %0, c0, c0, 0 \n" |
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| 86 | : "=r" (ident) |
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| 87 | ); |
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| 88 | |||
| 89 | cpu->imp_num = ident >> 24; |
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| 90 | cpu->variant_num = (ident << 8) >> 28; |
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| 91 | cpu->arch_num = (ident << 12) >> 28; |
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| 92 | cpu->prim_part_num = (ident << 16) >> 20; |
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| 93 | cpu->rev_num = (ident << 28) >> 28; |
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| 2128 | jermar | 94 | } |
| 95 | |||
| 2189 | kebrt | 96 | |
| 2357 | kebrt | 97 | /** Does nothing on ARM. */ |
| 2329 | kebrt | 98 | void cpu_arch_init(void) |
| 99 | { |
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| 100 | } |
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| 101 | |||
| 102 | |||
| 2357 | kebrt | 103 | /** Retrieves processor identification and stores it to #CPU.arch */ |
| 2189 | kebrt | 104 | void cpu_identify(void) |
| 105 | { |
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| 106 | arch_cpu_identify(&CPU->arch); |
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| 107 | } |
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| 108 | |||
| 109 | |||
| 2357 | kebrt | 110 | /** Prints CPU identification. */ |
| 2128 | jermar | 111 | void cpu_print_report(cpu_t *m) |
| 112 | { |
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| 2189 | kebrt | 113 | char * vendor = imp_data[0]; |
| 114 | char * architecture = arch_data[0]; |
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| 115 | cpu_arch_t * cpu_arch = &m->arch; |
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| 116 | |||
| 2329 | kebrt | 117 | if ( (cpu_arch->imp_num) > 0 && (cpu_arch->imp_num < (imp_data_length + IMP_DATA_START_OFFSET)) ) { |
| 118 | vendor = imp_data[cpu_arch->imp_num - IMP_DATA_START_OFFSET]; |
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| 2189 | kebrt | 119 | } |
| 120 | |||
| 121 | if ( (cpu_arch->arch_num) > 0 && (cpu_arch->arch_num < arch_data_length) ) { |
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| 122 | architecture = arch_data[cpu_arch->arch_num]; |
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| 123 | } |
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| 124 | |||
| 2448 | jermar | 125 | printf("cpu%d: vendor=%s, architecture=ARM %s, part number=%x, variant=%x, revision=%x\n", |
| 126 | m->id, vendor, architecture, cpu_arch->prim_part_num, cpu_arch->variant_num, cpu_arch->rev_num); |
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| 2128 | jermar | 127 | } |
| 128 | |||
| 129 | /** @} |
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| 130 | */ |