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 * Ternary instructions instr rA,rS,UIMM 29 * 30 * Logic instructions: ori, oris, xori, xoris 31 * 32 * The test contains a pre-built table of instructions, operands and 33 * expected results. For each table entry, the test will cyclically use 34 * different sets of operand registers and result registers. 35 */ 36 37 #include <post.h> 38 #include "cpu_asm.h" 39 40 #if CONFIG_POST & CONFIG_SYS_POST_CPU 41 42 extern void cpu_post_exec_21 (ulong *code, ulong *cr, ulong *res, ulong op); 43 extern ulong cpu_post_makecr (long v); 44 45 static struct cpu_post_threei_s 46 { 47 ulong cmd; 48 ulong op1; 49 ushort op2; 50 ulong res; 51 } cpu_post_threei_table[] = 52 { 53 { 54 OP_ORI, 55 0x80000000, 56 0xffff, 57 0x8000ffff 58 }, 59 { 60 OP_ORIS, 61 0x00008000, 62 0xffff, 63 0xffff8000 64 }, 65 { 66 OP_XORI, 67 0x8000ffff, 68 0xffff, 69 0x80000000 70 }, 71 { 72 OP_XORIS, 73 0x00008000, 74 0xffff, 75 0xffff8000 76 }, 77 }; 78 static unsigned int cpu_post_threei_size = 79 sizeof (cpu_post_threei_table) / sizeof (struct cpu_post_threei_s); 80 81 int cpu_post_test_threei (void) 82 { 83 int ret = 0; 84 unsigned int i, reg; 85 int flag = disable_interrupts(); 86 87 for (i = 0; i < cpu_post_threei_size && ret == 0; i++) 88 { 89 struct cpu_post_threei_s *test = cpu_post_threei_table + i; 90 91 for (reg = 0; reg < 32 && ret == 0; reg++) 92 { 93 unsigned int reg0 = (reg + 0) % 32; 94 unsigned int reg1 = (reg + 1) % 32; 95 unsigned int stk = reg < 16 ? 31 : 15; 96 unsigned long code[] = 97 { 98 ASM_STW(stk, 1, -4), 99 ASM_ADDI(stk, 1, -16), 100 ASM_STW(3, stk, 8), 101 ASM_STW(reg0, stk, 4), 102 ASM_STW(reg1, stk, 0), 103 ASM_LWZ(reg0, stk, 8), 104 ASM_11IX(test->cmd, reg1, reg0, test->op2), 105 ASM_STW(reg1, stk, 8), 106 ASM_LWZ(reg1, stk, 0), 107 ASM_LWZ(reg0, stk, 4), 108 ASM_LWZ(3, stk, 8), 109 ASM_ADDI(1, stk, 16), 110 ASM_LWZ(stk, 1, -4), 111 ASM_BLR, 112 }; 113 ulong res; 114 ulong cr; 115 116 cr = 0; 117 cpu_post_exec_21 (code, & cr, & res, test->op1); 118 119 ret = res == test->res && cr == 0 ? 0 : -1; 120 121 if (ret != 0) 122 { 123 post_log ("Error at threei test %d !\n", i); 124 } 125 } 126 } 127 128 if (flag) 129 enable_interrupts(); 130 131 return ret; 132 } 133 134 #endif 135