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