1 /* 2 * (C) Copyright 2002 3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <common.h> 9 10 /* 11 * CPU test 12 * Integer compare instructions: cmpwi, cmplwi 13 * 14 * To verify these instructions the test runs them with 15 * different combinations of operands, reads the condition 16 * register value and compares it with the expected one. 17 * The test contains a pre-built table 18 * containing the description of each test case: the instruction, 19 * the values of the operands, the condition field to save 20 * the result in and the expected result. 21 */ 22 23 #include <post.h> 24 #include "cpu_asm.h" 25 26 #if CONFIG_POST & CONFIG_SYS_POST_CPU 27 28 extern void cpu_post_exec_11 (ulong *code, ulong *res, ulong op1); 29 30 static struct cpu_post_cmpi_s 31 { 32 ulong cmd; 33 ulong op1; 34 ushort op2; 35 ulong cr; 36 ulong res; 37 } cpu_post_cmpi_table[] = 38 { 39 { 40 OP_CMPWI, 41 123, 42 123, 43 2, 44 0x02 45 }, 46 { 47 OP_CMPWI, 48 123, 49 133, 50 3, 51 0x08 52 }, 53 { 54 OP_CMPWI, 55 123, 56 -133, 57 4, 58 0x04 59 }, 60 { 61 OP_CMPLWI, 62 123, 63 123, 64 2, 65 0x02 66 }, 67 { 68 OP_CMPLWI, 69 123, 70 -133, 71 3, 72 0x08 73 }, 74 { 75 OP_CMPLWI, 76 123, 77 113, 78 4, 79 0x04 80 }, 81 }; 82 static unsigned int cpu_post_cmpi_size = ARRAY_SIZE(cpu_post_cmpi_table); 83 84 int cpu_post_test_cmpi (void) 85 { 86 int ret = 0; 87 unsigned int i; 88 int flag = disable_interrupts(); 89 90 for (i = 0; i < cpu_post_cmpi_size && ret == 0; i++) 91 { 92 struct cpu_post_cmpi_s *test = cpu_post_cmpi_table + i; 93 unsigned long code[] = 94 { 95 ASM_1IC(test->cmd, test->cr, 3, test->op2), 96 ASM_MFCR(3), 97 ASM_BLR 98 }; 99 ulong res; 100 101 cpu_post_exec_11 (code, & res, test->op1); 102 103 ret = ((res >> (28 - 4 * test->cr)) & 0xe) == test->res ? 0 : -1; 104 105 if (ret != 0) 106 { 107 post_log ("Error at cmpi test %d !\n", i); 108 } 109 } 110 111 if (flag) 112 enable_interrupts(); 113 114 return ret; 115 } 116 117 #endif 118