1 /* 2 * (C) Copyright 2002 3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 * 5 * See file CREDITS for list of people who contributed to this 6 * project. 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation; either version 2 of 11 * the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21 * MA 02111-1307 USA 22 */ 23 24 #include <common.h> 25 26 /* 27 * CPU test 28 * Load instructions: lbz(x)(u), lhz(x)(u), lha(x)(u), lwz(x)(u) 29 * 30 * All operations are performed on a 16-byte array. The array 31 * is 4-byte aligned. The base register points to offset 8. 32 * The immediate offset (index register) ranges in [-8 ... +7]. 33 * The test cases are composed so that they do not 34 * cause alignment exceptions. 35 * The test contains a pre-built table describing all test cases. 36 * The table entry contains: 37 * the instruction opcode, the array contents, the value of the index 38 * register and the expected value of the destination register. 39 * After executing the instruction, the test verifies the 40 * value of the destination register and the value of the base 41 * register (it must change for "load with update" instructions). 42 */ 43 44 #include <post.h> 45 #include "cpu_asm.h" 46 47 #if CONFIG_POST & CONFIG_SYS_POST_CPU 48 49 extern void cpu_post_exec_22w (ulong *code, ulong *op1, ulong op2, ulong *op3); 50 extern void cpu_post_exec_21w (ulong *code, ulong *op1, ulong *op2); 51 52 static struct cpu_post_load_s 53 { 54 ulong cmd; 55 uint width; 56 int update; 57 int index; 58 ulong offset; 59 } cpu_post_load_table[] = 60 { 61 { 62 OP_LWZ, 63 4, 64 0, 65 0, 66 4 67 }, 68 { 69 OP_LHA, 70 3, 71 0, 72 0, 73 2 74 }, 75 { 76 OP_LHZ, 77 2, 78 0, 79 0, 80 2 81 }, 82 { 83 OP_LBZ, 84 1, 85 0, 86 0, 87 1 88 }, 89 { 90 OP_LWZU, 91 4, 92 1, 93 0, 94 4 95 }, 96 { 97 OP_LHAU, 98 3, 99 1, 100 0, 101 2 102 }, 103 { 104 OP_LHZU, 105 2, 106 1, 107 0, 108 2 109 }, 110 { 111 OP_LBZU, 112 1, 113 1, 114 0, 115 1 116 }, 117 { 118 OP_LWZX, 119 4, 120 0, 121 1, 122 4 123 }, 124 { 125 OP_LHAX, 126 3, 127 0, 128 1, 129 2 130 }, 131 { 132 OP_LHZX, 133 2, 134 0, 135 1, 136 2 137 }, 138 { 139 OP_LBZX, 140 1, 141 0, 142 1, 143 1 144 }, 145 { 146 OP_LWZUX, 147 4, 148 1, 149 1, 150 4 151 }, 152 { 153 OP_LHAUX, 154 3, 155 1, 156 1, 157 2 158 }, 159 { 160 OP_LHZUX, 161 2, 162 1, 163 1, 164 2 165 }, 166 { 167 OP_LBZUX, 168 1, 169 1, 170 1, 171 1 172 }, 173 }; 174 static unsigned int cpu_post_load_size = 175 sizeof (cpu_post_load_table) / sizeof (struct cpu_post_load_s); 176 177 int cpu_post_test_load (void) 178 { 179 int ret = 0; 180 unsigned int i; 181 int flag = disable_interrupts(); 182 183 for (i = 0; i < cpu_post_load_size && ret == 0; i++) 184 { 185 struct cpu_post_load_s *test = cpu_post_load_table + i; 186 uchar data[16] = 187 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 }; 188 ulong base0 = (ulong) (data + 8); 189 ulong base = base0; 190 ulong value; 191 192 if (test->index) 193 { 194 ulong code[] = 195 { 196 ASM_12(test->cmd, 5, 3, 4), 197 ASM_BLR, 198 }; 199 200 cpu_post_exec_22w (code, &base, test->offset, &value); 201 } 202 else 203 { 204 ulong code[] = 205 { 206 ASM_11I(test->cmd, 4, 3, test->offset), 207 ASM_BLR, 208 }; 209 210 cpu_post_exec_21w (code, &base, &value); 211 } 212 213 if (ret == 0) 214 { 215 if (test->update) 216 ret = base == base0 + test->offset ? 0 : -1; 217 else 218 ret = base == base0 ? 0 : -1; 219 } 220 221 if (ret == 0) 222 { 223 switch (test->width) 224 { 225 case 1: 226 ret = *(uchar *)(base0 + test->offset) == value ? 227 0 : -1; 228 break; 229 case 2: 230 ret = *(ushort *)(base0 + test->offset) == value ? 231 0 : -1; 232 break; 233 case 3: 234 ret = *(short *)(base0 + test->offset) == value ? 235 0 : -1; 236 break; 237 case 4: 238 ret = *(ulong *)(base0 + test->offset) == value ? 239 0 : -1; 240 break; 241 } 242 } 243 244 if (ret != 0) 245 { 246 post_log ("Error at load test %d !\n", i); 247 } 248 } 249 250 if (flag) 251 enable_interrupts(); 252 253 return ret; 254 } 255 256 #endif 257