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Make sure that argv[] argument pointers are not modified.
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1 /*
2  * Copyright 2008-2009 Freescale Semiconductor, Inc.
3  *
4  * See file CREDITS for list of people who contributed to this
5  * project.
6  *
7  * This program is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public License as
9  * published by the Free Software Foundation; either version 2 of
10  * the License, or (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
20  * MA 02111-1307 USA
21  */
22
23 #include <common.h>
24 #include <command.h>
25
26 int
27 cpu_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
28 {
29         unsigned long cpuid;
30
31         if (argc < 3) {
32                 cmd_usage(cmdtp);
33                 return 1;
34         }
35
36         cpuid = simple_strtoul(argv[1], NULL, 10);
37         if (cpuid >= cpu_numcores()) {
38                 printf ("Core num: %lu is out of range[0..%d]\n",
39                                 cpuid, cpu_numcores() - 1);
40                 return 1;
41         }
42
43
44         if (argc == 3) {
45                 if (strncmp(argv[2], "reset", 5) == 0) {
46                         cpu_reset(cpuid);
47                 } else if (strncmp(argv[2], "status", 6) == 0) {
48                         cpu_status(cpuid);
49                 } else if (strncmp(argv[2], "disable", 7) == 0) {
50                         return cpu_disable(cpuid);
51                 } else {
52                         cmd_usage(cmdtp);
53                         return 1;
54                 }
55                 return 0;
56         }
57
58         /* 4 or greater, make sure its release */
59         if (strncmp(argv[2], "release", 7) != 0) {
60                 cmd_usage(cmdtp);
61                 return 1;
62         }
63
64         if (cpu_release(cpuid, argc - 3, argv + 3)) {
65                 cmd_usage(cmdtp);
66                 return 1;
67         }
68
69         return 0;
70 }
71
72 #ifdef CONFIG_PPC
73 #define CPU_ARCH_HELP \
74         "                         [args] : <pir> <r3> <r6>\n" \
75         "                                   pir - processor id (if writeable)\n" \
76         "                                    r3 - value for gpr 3\n" \
77         "                                    r6 - value for gpr 6\n" \
78         "\n" \
79         "     Use '-' for any arg if you want the default value.\n" \
80         "     Default for r3 is <num> and r6 is 0\n" \
81         "\n" \
82         "     When cpu <num> is released r4 and r5 = 0.\n" \
83         "     r7 will contain the size of the initial mapped area"
84 #endif
85
86 U_BOOT_CMD(
87         cpu, CONFIG_SYS_MAXARGS, 1, cpu_cmd,
88         "Multiprocessor CPU boot manipulation and release",
89             "<num> reset                 - Reset cpu <num>\n"
90         "cpu <num> status                - Status of cpu <num>\n"
91         "cpu <num> disable               - Disable cpu <num>\n"
92         "cpu <num> release <addr> [args] - Release cpu <num> at <addr> with [args]"
93 #ifdef CPU_ARCH_HELP
94         "\n"
95         CPU_ARCH_HELP
96 #endif
97 );