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: srawi 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 op); 41 extern ulong cpu_post_makecr (long v); 42 43 static struct cpu_post_srawi_s 44 { 45 ulong cmd; 46 ulong op1; 47 uchar op2; 48 ulong res; 49 } cpu_post_srawi_table[] = 50 { 51 { 52 OP_SRAWI, 53 0x8000, 54 3, 55 0x1000 56 }, 57 { 58 OP_SRAWI, 59 0x80000000, 60 3, 61 0xf0000000 62 }, 63 }; 64 static unsigned int cpu_post_srawi_size = 65 sizeof (cpu_post_srawi_table) / sizeof (struct cpu_post_srawi_s); 66 67 int cpu_post_test_srawi (void) 68 { 69 int ret = 0; 70 unsigned int i, reg; 71 int flag = disable_interrupts(); 72 73 for (i = 0; i < cpu_post_srawi_size && ret == 0; i++) 74 { 75 struct cpu_post_srawi_s *test = cpu_post_srawi_table + i; 76 77 for (reg = 0; reg < 32 && ret == 0; reg++) 78 { 79 unsigned int reg0 = (reg + 0) % 32; 80 unsigned int reg1 = (reg + 1) % 32; 81 unsigned int stk = reg < 16 ? 31 : 15; 82 unsigned long code[] = 83 { 84 ASM_STW(stk, 1, -4), 85 ASM_ADDI(stk, 1, -16), 86 ASM_STW(3, stk, 8), 87 ASM_STW(reg0, stk, 4), 88 ASM_STW(reg1, stk, 0), 89 ASM_LWZ(reg0, stk, 8), 90 ASM_11S(test->cmd, reg1, reg0, test->op2), 91 ASM_STW(reg1, stk, 8), 92 ASM_LWZ(reg1, stk, 0), 93 ASM_LWZ(reg0, stk, 4), 94 ASM_LWZ(3, stk, 8), 95 ASM_ADDI(1, stk, 16), 96 ASM_LWZ(stk, 1, -4), 97 ASM_BLR, 98 }; 99 unsigned long codecr[] = 100 { 101 ASM_STW(stk, 1, -4), 102 ASM_ADDI(stk, 1, -16), 103 ASM_STW(3, stk, 8), 104 ASM_STW(reg0, stk, 4), 105 ASM_STW(reg1, stk, 0), 106 ASM_LWZ(reg0, stk, 8), 107 ASM_11S(test->cmd, reg1, reg0, test->op2) | BIT_C, 108 ASM_STW(reg1, stk, 8), 109 ASM_LWZ(reg1, stk, 0), 110 ASM_LWZ(reg0, stk, 4), 111 ASM_LWZ(3, stk, 8), 112 ASM_ADDI(1, stk, 16), 113 ASM_LWZ(stk, 1, -4), 114 ASM_BLR, 115 }; 116 ulong res; 117 ulong cr; 118 119 if (ret == 0) 120 { 121 cr = 0; 122 cpu_post_exec_21 (code, & cr, & res, test->op1); 123 124 ret = res == test->res && cr == 0 ? 0 : -1; 125 126 if (ret != 0) 127 { 128 post_log ("Error at srawi test %d !\n", i); 129 } 130 } 131 132 if (ret == 0) 133 { 134 cpu_post_exec_21 (codecr, & cr, & res, test->op1); 135 136 ret = res == test->res && 137 (cr & 0xe0000000) == cpu_post_makecr (res) ? 0 : -1; 138 139 if (ret != 0) 140 { 141 post_log ("Error at srawi test %d !\n", i); 142 } 143 } 144 } 145 } 146 147 if (flag) 148 enable_interrupts(); 149 150 return ret; 151 } 152 153 #endif 154