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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 | |||
2329 | kebrt | 41 | /** Number of indexes left out in the #imp_data array */ |
42 | #define IMP_DATA_START_OFFSET 0x40 |
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43 | |||
2189 | kebrt | 44 | /** Implementators (vendor) names */ |
2464 | jermar | 45 | static char *imp_data[] = { |
46 | "?", /* IMP_DATA_START_OFFSET */ |
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47 | "ARM Ltd", /* 0x41 */ |
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48 | "", /* 0x42 */ |
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49 | "", /* 0x43 */ |
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50 | "Digital Equipment Corporation", /* 0x44 */ |
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51 | "", "", "", "", "", "", "", "", "", "", /* 0x45 - 0x4e */ |
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52 | "", "", "", "", "", "", "", "", "", "", /* 0x4f - 0x58 */ |
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53 | "", "", "", "", "", "", "", "", "", "", /* 0x59 - 0x62 */ |
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54 | "", "", "", "", "", "", /* 0x63 - 0x68 */ |
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55 | "Intel Corporation" /* 0x69 */ |
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2189 | kebrt | 56 | }; |
57 | |||
2329 | kebrt | 58 | /** Length of the #imp_data array */ |
2464 | jermar | 59 | static int imp_data_length = sizeof(imp_data) / sizeof(char *); |
2189 | kebrt | 60 | |
61 | /** Architecture names */ |
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2464 | jermar | 62 | static char *arch_data[] = { |
2189 | kebrt | 63 | "?", /* 0x0 */ |
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 */ |
2464 | jermar | 74 | static int arch_data_length = sizeof(arch_data) / sizeof(char *); |
2189 | kebrt | 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 | */ |
2464 | jermar | 81 | static void arch_cpu_identify(cpu_arch_t *cpu) |
2128 | jermar | 82 | { |
2189 | kebrt | 83 | uint32_t ident; |
84 | asm volatile ( |
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2464 | jermar | 85 | "mrc p15, 0, %0, c0, c0, 0\n" |
2189 | kebrt | 86 | : "=r" (ident) |
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 | |||
2357 | kebrt | 96 | /** Does nothing on ARM. */ |
2329 | kebrt | 97 | void cpu_arch_init(void) |
98 | { |
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99 | } |
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100 | |||
2357 | kebrt | 101 | /** Retrieves processor identification and stores it to #CPU.arch */ |
2189 | kebrt | 102 | void cpu_identify(void) |
103 | { |
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104 | arch_cpu_identify(&CPU->arch); |
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105 | } |
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106 | |||
2357 | kebrt | 107 | /** Prints CPU identification. */ |
2128 | jermar | 108 | void cpu_print_report(cpu_t *m) |
109 | { |
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2189 | kebrt | 110 | char * vendor = imp_data[0]; |
111 | char * architecture = arch_data[0]; |
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112 | cpu_arch_t * cpu_arch = &m->arch; |
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113 | |||
2464 | jermar | 114 | if ((cpu_arch->imp_num) > 0 && |
115 | (cpu_arch->imp_num < (imp_data_length + IMP_DATA_START_OFFSET))) { |
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2329 | kebrt | 116 | vendor = imp_data[cpu_arch->imp_num - IMP_DATA_START_OFFSET]; |
2189 | kebrt | 117 | } |
118 | |||
2464 | jermar | 119 | if ((cpu_arch->arch_num) > 0 && |
120 | (cpu_arch->arch_num < arch_data_length)) { |
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2189 | kebrt | 121 | architecture = arch_data[cpu_arch->arch_num]; |
122 | } |
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123 | |||
2464 | jermar | 124 | printf("cpu%d: vendor=%s, architecture=ARM%s, part number=%x, " |
125 | "variant=%x, revision=%x\n", |
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126 | m->id, vendor, architecture, cpu_arch->prim_part_num, |
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127 | cpu_arch->variant_num, cpu_arch->rev_num); |
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2128 | jermar | 128 | } |
129 | |||
130 | /** @} |
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131 | */ |