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 * Load/store string instructions: lswi, stswi, lswx, stswx 12 * 13 * Several consecutive bytes from a source memory buffer are loaded 14 * left to right into GPRs. After that, the bytes are stored 15 * from the GPRs into a target memory buffer. The contents 16 * of the source and target buffers are then compared. 17 */ 18 19 #include <post.h> 20 #include "cpu_asm.h" 21 22 #if CONFIG_POST & CONFIG_SYS_POST_CPU 23 24 extern void cpu_post_exec_02 (ulong *code, ulong op1, ulong op2); 25 extern void cpu_post_exec_04 (ulong *code, ulong op1, ulong op2, ulong op3, 26 ulong op4); 27 28 #include <bedbug/regs.h> 29 int cpu_post_test_string (void) 30 { 31 int ret = 0; 32 unsigned int i; 33 int flag = disable_interrupts(); 34 35 if (ret == 0) 36 { 37 char src [31], dst [31]; 38 39 ulong code[] = 40 { 41 ASM_LSWI(5, 3, 31), 42 ASM_STSWI(5, 4, 31), 43 ASM_BLR, 44 }; 45 46 for (i = 0; i < sizeof(src); i ++) 47 { 48 src[i] = (char) i; 49 dst[i] = 0; 50 } 51 52 cpu_post_exec_02(code, (ulong)src, (ulong)dst); 53 54 ret = memcmp(src, dst, sizeof(dst)) == 0 ? 0 : -1; 55 } 56 57 if (ret == 0) 58 { 59 char src [95], dst [95]; 60 61 ulong code[] = 62 { 63 ASM_LSWX(8, 3, 5), 64 ASM_STSWX(8, 4, 5), 65 ASM_BLR, 66 }; 67 68 for (i = 0; i < sizeof(src); i ++) 69 { 70 src[i] = (char) i; 71 dst[i] = 0; 72 } 73 74 cpu_post_exec_04(code, (ulong)src, (ulong)dst, 0, sizeof(src)); 75 76 ret = memcmp(src, dst, sizeof(dst)) == 0 ? 0 : -1; 77 } 78 79 if (ret != 0) 80 { 81 post_log ("Error at string test !\n"); 82 } 83 84 if (flag) 85 enable_interrupts(); 86 87 return ret; 88 } 89 90 #endif 91