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 
do_print_stats(void)10 static void do_print_stats(void)
11 {
12 	ulong start, size, needed_size, offset, count;
13 
14 	printf("iotrace is %sabled\n", iotrace_get_enabled() ? "en" : "dis");
15 	iotrace_get_buffer(&start, &size, &needed_size, &offset, &count);
16 	printf("Start:  %08lx\n", start);
17 	printf("Actual Size:   %08lx\n", size);
18 	printf("Needed Size:   %08lx\n", needed_size);
19 	iotrace_get_region(&start, &size);
20 	printf("Region: %08lx\n", start);
21 	printf("Size:   %08lx\n", size);
22 	printf("Offset: %08lx\n", offset);
23 	printf("Output: %08lx\n", start + offset);
24 	printf("Count:  %08lx\n", count);
25 	printf("CRC32:  %08lx\n", (ulong)iotrace_get_checksum());
26 }
27 
do_print_trace(void)28 static void do_print_trace(void)
29 {
30 	ulong start, size, needed_size, offset, count;
31 
32 	struct iotrace_record *cur_record;
33 
34 	iotrace_get_buffer(&start, &size, &needed_size, &offset, &count);
35 
36 	if (!start || !size || !count)
37 		return;
38 
39 	printf("Timestamp  Value          Address\n");
40 
41 	cur_record = (struct iotrace_record *)start;
42 	for (int i = 0; i < count; i++) {
43 		if (cur_record->flags & IOT_WRITE)
44 			printf("%08llu: 0x%08lx --> 0x%08llx\n",
45 			       cur_record->timestamp,
46 					cur_record->value,
47 					(unsigned long long)cur_record->addr);
48 		else
49 			printf("%08llu: 0x%08lx <-- 0x%08llx\n",
50 			       cur_record->timestamp,
51 					cur_record->value,
52 					(unsigned long long)cur_record->addr);
53 
54 		cur_record++;
55 	}
56 }
57 
do_set_buffer(int argc,char * const argv[])58 static int do_set_buffer(int argc, char *const argv[])
59 {
60 	ulong addr = 0, size = 0;
61 
62 	if (argc == 2) {
63 		addr = simple_strtoul(*argv++, NULL, 16);
64 		size = simple_strtoul(*argv++, NULL, 16);
65 	} else if (argc != 0) {
66 		return CMD_RET_USAGE;
67 	}
68 
69 	iotrace_set_buffer(addr, size);
70 
71 	return 0;
72 }
73 
do_set_region(int argc,char * const argv[])74 static int do_set_region(int argc, char *const argv[])
75 {
76 	ulong addr = 0, size = 0;
77 
78 	if (argc == 2) {
79 		addr = simple_strtoul(*argv++, NULL, 16);
80 		size = simple_strtoul(*argv++, NULL, 16);
81 	} else if (argc != 0) {
82 		return CMD_RET_USAGE;
83 	}
84 
85 	iotrace_set_region(addr, size);
86 
87 	return 0;
88 }
89 
do_iotrace(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])90 int do_iotrace(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
91 {
92 	const char *cmd = argc < 2 ? NULL : argv[1];
93 
94 	if (!cmd)
95 		return cmd_usage(cmdtp);
96 	switch (*cmd) {
97 	case 'b':
98 		return do_set_buffer(argc - 2, argv + 2);
99 	case 'l':
100 		return do_set_region(argc - 2, argv + 2);
101 	case 'p':
102 		iotrace_set_enabled(0);
103 		break;
104 	case 'r':
105 		iotrace_set_enabled(1);
106 		break;
107 	case 's':
108 		do_print_stats();
109 		break;
110 	case 'd':
111 		do_print_trace();
112 		break;
113 	default:
114 		return CMD_RET_USAGE;
115 	}
116 
117 	return 0;
118 }
119 
120 U_BOOT_CMD(
121 	iotrace,	4,	1,	do_iotrace,
122 	"iotrace utility commands",
123 	"stats                        - display iotrace stats\n"
124 	"iotrace buffer <address> <size>      - set iotrace buffer\n"
125 	"iotrace limit <address> <size>       - set iotrace region limit\n"
126 	"iotrace pause                        - pause tracing\n"
127 	"iotrace resume                       - resume tracing\n"
128 	"iotrace dump                         - dump iotrace buffer"
129 );
130