1 /*
2 * Copyright (c) 2011 The Chromium OS Authors.
3 *
4 * SPDX-License-Identifier: GPL-2.0+
5 */
6
7 #include <common.h>
8 #include <command.h>
9 #include <mapmem.h>
10 #include <trace.h>
11 #include <asm/io.h>
12
get_args(int argc,char * const argv[],char ** buff,size_t * buff_ptr,size_t * buff_size)13 static int get_args(int argc, char * const argv[], char **buff,
14 size_t *buff_ptr, size_t *buff_size)
15 {
16 if (argc < 2)
17 return -1;
18 if (argc < 4) {
19 *buff_size = getenv_ulong("profsize", 16, 0);
20 *buff = map_sysmem(getenv_ulong("profbase", 16, 0),
21 *buff_size);
22 *buff_ptr = getenv_ulong("profoffset", 16, 0);
23 } else {
24 *buff_size = simple_strtoul(argv[3], NULL, 16);
25 *buff = map_sysmem(simple_strtoul(argv[2], NULL, 16),
26 *buff_size);
27 *buff_ptr = 0;
28 };
29 return 0;
30 }
31
create_func_list(int argc,char * const argv[])32 static int create_func_list(int argc, char * const argv[])
33 {
34 size_t buff_size, avail, buff_ptr, used;
35 unsigned int needed;
36 char *buff;
37 int err;
38
39 if (get_args(argc, argv, &buff, &buff_ptr, &buff_size))
40 return -1;
41
42 avail = buff_size - buff_ptr;
43 err = trace_list_functions(buff + buff_ptr, avail, &needed);
44 if (err)
45 printf("Error: truncated (%#x bytes needed)\n", needed);
46 used = min(avail, needed);
47 printf("Function trace dumped to %08lx, size %#zx\n",
48 (ulong)map_to_sysmem(buff + buff_ptr), used);
49 setenv_hex("profbase", map_to_sysmem(buff));
50 setenv_hex("profsize", buff_size);
51 setenv_hex("profoffset", buff_ptr + used);
52
53 return 0;
54 }
55
create_call_list(int argc,char * const argv[])56 static int create_call_list(int argc, char * const argv[])
57 {
58 size_t buff_size, avail, buff_ptr, used;
59 unsigned int needed;
60 char *buff;
61 int err;
62
63 if (get_args(argc, argv, &buff, &buff_ptr, &buff_size))
64 return -1;
65
66 avail = buff_size - buff_ptr;
67 err = trace_list_calls(buff + buff_ptr, avail, &needed);
68 if (err)
69 printf("Error: truncated (%#x bytes needed)\n", needed);
70 used = min(avail, needed);
71 printf("Call list dumped to %08lx, size %#zx\n",
72 (ulong)map_to_sysmem(buff + buff_ptr), used);
73
74 setenv_hex("profbase", map_to_sysmem(buff));
75 setenv_hex("profsize", buff_size);
76 setenv_hex("profoffset", buff_ptr + used);
77
78 return 0;
79 }
80
do_trace(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])81 int do_trace(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
82 {
83 const char *cmd = argc < 2 ? NULL : argv[1];
84
85 if (!cmd)
86 return cmd_usage(cmdtp);
87 switch (*cmd) {
88 case 'p':
89 trace_set_enabled(0);
90 break;
91 case 'c':
92 if (create_call_list(argc, argv))
93 return cmd_usage(cmdtp);
94 break;
95 case 'r':
96 trace_set_enabled(1);
97 break;
98 case 'f':
99 if (create_func_list(argc, argv))
100 return cmd_usage(cmdtp);
101 break;
102 case 's':
103 trace_print_stats();
104 break;
105 default:
106 return CMD_RET_USAGE;
107 }
108
109 return 0;
110 }
111
112 U_BOOT_CMD(
113 trace, 4, 1, do_trace,
114 "trace utility commands",
115 "stats - display tracing statistics\n"
116 "trace pause - pause tracing\n"
117 "trace resume - resume tracing\n"
118 "trace funclist [<addr> <size>] - dump function list into buffer\n"
119 "trace calls [<addr> <size>] "
120 "- dump function call trace into buffer"
121 );
122