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 * Integer compare instructions: cmpwi, cmplwi 29 * 30 * To verify these instructions the test runs them with 31 * different combinations of operands, reads the condition 32 * register value and compares it with the expected one. 33 * The test contains a pre-built table 34 * containing the description of each test case: the instruction, 35 * the values of the operands, the condition field to save 36 * the result in and the expected result. 37 */ 38 39 #include <post.h> 40 #include "cpu_asm.h" 41 42 #if CONFIG_POST & CONFIG_SYS_POST_CPU 43 44 extern void cpu_post_exec_11 (ulong *code, ulong *res, ulong op1); 45 46 static struct cpu_post_cmpi_s 47 { 48 ulong cmd; 49 ulong op1; 50 ushort op2; 51 ulong cr; 52 ulong res; 53 } cpu_post_cmpi_table[] = 54 { 55 { 56 OP_CMPWI, 57 123, 58 123, 59 2, 60 0x02 61 }, 62 { 63 OP_CMPWI, 64 123, 65 133, 66 3, 67 0x08 68 }, 69 { 70 OP_CMPWI, 71 123, 72 -133, 73 4, 74 0x04 75 }, 76 { 77 OP_CMPLWI, 78 123, 79 123, 80 2, 81 0x02 82 }, 83 { 84 OP_CMPLWI, 85 123, 86 -133, 87 3, 88 0x08 89 }, 90 { 91 OP_CMPLWI, 92 123, 93 113, 94 4, 95 0x04 96 }, 97 }; 98 static unsigned int cpu_post_cmpi_size = ARRAY_SIZE(cpu_post_cmpi_table); 99 100 int cpu_post_test_cmpi (void) 101 { 102 int ret = 0; 103 unsigned int i; 104 int flag = disable_interrupts(); 105 106 for (i = 0; i < cpu_post_cmpi_size && ret == 0; i++) 107 { 108 struct cpu_post_cmpi_s *test = cpu_post_cmpi_table + i; 109 unsigned long code[] = 110 { 111 ASM_1IC(test->cmd, test->cr, 3, test->op2), 112 ASM_MFCR(3), 113 ASM_BLR 114 }; 115 ulong res; 116 117 cpu_post_exec_11 (code, & res, test->op1); 118 119 ret = ((res >> (28 - 4 * test->cr)) & 0xe) == test->res ? 0 : -1; 120 121 if (ret != 0) 122 { 123 post_log ("Error at cmpi test %d !\n", i); 124 } 125 } 126 127 if (flag) 128 enable_interrupts(); 129 130 return ret; 131 } 132 133 #endif 134