1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (c) 2014 Google, Inc 4 */ 5 6 #include <common.h> 7 #include <command.h> 8 #include <iotrace.h> 9 10 static void do_print_stats(void) 11 { 12 ulong start, size, offset, count; 13 14 printf("iotrace is %sabled\n", iotrace_get_enabled() ? "en" : "dis"); 15 iotrace_get_buffer(&start, &size, &offset, &count); 16 printf("Start: %08lx\n", start); 17 printf("Size: %08lx\n", size); 18 printf("Offset: %08lx\n", offset); 19 printf("Output: %08lx\n", start + offset); 20 printf("Count: %08lx\n", count); 21 printf("CRC32: %08lx\n", (ulong)iotrace_get_checksum()); 22 } 23 24 static int do_set_buffer(int argc, char * const argv[]) 25 { 26 ulong addr = 0, size = 0; 27 28 if (argc == 2) { 29 addr = simple_strtoul(*argv++, NULL, 16); 30 size = simple_strtoul(*argv++, NULL, 16); 31 } else if (argc != 0) { 32 return CMD_RET_USAGE; 33 } 34 35 iotrace_set_buffer(addr, size); 36 37 return 0; 38 } 39 40 int do_iotrace(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 41 { 42 const char *cmd = argc < 2 ? NULL : argv[1]; 43 44 if (!cmd) 45 return cmd_usage(cmdtp); 46 switch (*cmd) { 47 case 'b': 48 return do_set_buffer(argc - 2, argv + 2); 49 case 'p': 50 iotrace_set_enabled(0); 51 break; 52 case 'r': 53 iotrace_set_enabled(1); 54 break; 55 case 's': 56 do_print_stats(); 57 break; 58 default: 59 return CMD_RET_USAGE; 60 } 61 62 return 0; 63 } 64 65 U_BOOT_CMD( 66 iotrace, 4, 1, do_iotrace, 67 "iotrace utility commands", 68 "stats - display iotrace stats\n" 69 "iotrace buffer <address> <size> - set iotrace buffer\n" 70 "iotrace pause - pause tracing\n" 71 "iotrace resume - resume tracing" 72 ); 73