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 * Shift instructions: rlwinm 29 * 30 * The test contains a pre-built table of instructions, operands and 31 * expected results. For each table entry, the test will cyclically use 32 * different sets of operand registers and result registers. 33 */ 34 35 #include <post.h> 36 #include "cpu_asm.h" 37 38 #if CONFIG_POST & CONFIG_SYS_POST_CPU 39 40 extern void cpu_post_exec_21 (ulong *code, ulong *cr, ulong *res, ulong op1); 41 extern ulong cpu_post_makecr (long v); 42 43 static struct cpu_post_rlwinm_s 44 { 45 ulong cmd; 46 ulong op1; 47 uchar op2; 48 uchar mb; 49 uchar me; 50 ulong res; 51 } cpu_post_rlwinm_table[] = 52 { 53 { 54 OP_RLWINM, 55 0xffff0000, 56 24, 57 16, 58 23, 59 0x0000ff00 60 }, 61 }; 62 static unsigned int cpu_post_rlwinm_size = 63 sizeof (cpu_post_rlwinm_table) / sizeof (struct cpu_post_rlwinm_s); 64 65 int cpu_post_test_rlwinm (void) 66 { 67 int ret = 0; 68 unsigned int i, reg; 69 int flag = disable_interrupts(); 70 71 for (i = 0; i < cpu_post_rlwinm_size && ret == 0; i++) 72 { 73 struct cpu_post_rlwinm_s *test = cpu_post_rlwinm_table + i; 74 75 for (reg = 0; reg < 32 && ret == 0; reg++) 76 { 77 unsigned int reg0 = (reg + 0) % 32; 78 unsigned int reg1 = (reg + 1) % 32; 79 unsigned int stk = reg < 16 ? 31 : 15; 80 unsigned long code[] = 81 { 82 ASM_STW(stk, 1, -4), 83 ASM_ADDI(stk, 1, -16), 84 ASM_STW(3, stk, 8), 85 ASM_STW(reg0, stk, 4), 86 ASM_STW(reg1, stk, 0), 87 ASM_LWZ(reg0, stk, 8), 88 ASM_113(test->cmd, reg1, reg0, test->op2, test->mb, test->me), 89 ASM_STW(reg1, stk, 8), 90 ASM_LWZ(reg1, stk, 0), 91 ASM_LWZ(reg0, stk, 4), 92 ASM_LWZ(3, stk, 8), 93 ASM_ADDI(1, stk, 16), 94 ASM_LWZ(stk, 1, -4), 95 ASM_BLR, 96 }; 97 unsigned long codecr[] = 98 { 99 ASM_STW(stk, 1, -4), 100 ASM_ADDI(stk, 1, -16), 101 ASM_STW(3, stk, 8), 102 ASM_STW(reg0, stk, 4), 103 ASM_STW(reg1, stk, 0), 104 ASM_LWZ(reg0, stk, 8), 105 ASM_113(test->cmd, reg1, reg0, test->op2, test->mb, 106 test->me) | BIT_C, 107 ASM_STW(reg1, stk, 8), 108 ASM_LWZ(reg1, stk, 0), 109 ASM_LWZ(reg0, stk, 4), 110 ASM_LWZ(3, stk, 8), 111 ASM_ADDI(1, stk, 16), 112 ASM_LWZ(stk, 1, -4), 113 ASM_BLR, 114 }; 115 ulong res; 116 ulong cr; 117 118 if (ret == 0) 119 { 120 cr = 0; 121 cpu_post_exec_21 (code, & cr, & res, test->op1); 122 123 ret = res == test->res && cr == 0 ? 0 : -1; 124 125 if (ret != 0) 126 { 127 post_log ("Error at rlwinm test %d !\n", i); 128 } 129 } 130 131 if (ret == 0) 132 { 133 cpu_post_exec_21 (codecr, & cr, & res, test->op1); 134 135 ret = res == test->res && 136 (cr & 0xe0000000) == cpu_post_makecr (res) ? 0 : -1; 137 138 if (ret != 0) 139 { 140 post_log ("Error at rlwinm test %d !\n", i); 141 } 142 } 143 } 144 } 145 146 if (flag) 147 enable_interrupts(); 148 149 return ret; 150 } 151 152 #endif 153