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"Das U-Boot" Source Tree
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright 2008-2009 Freescale Semiconductor, Inc.
4 */
5
6#include <command.h>
7#include <cpu_func.h>
8#include <vsprintf.h>
9
10static int cpu_status_all(void)
11{
12 unsigned long cpuid;
13
14 for (cpuid = 0; ; cpuid++) {
15 if (!is_core_valid(cpuid)) {
16 if (cpuid == 0) {
17 printf("Core num: %lu is not valid\n", cpuid);
18 return 1;
19 }
20 break;
21 }
22 cpu_status(cpuid);
23 }
24
25 return 0;
26}
27
28static int
29cpu_cmd(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
30{
31 unsigned long cpuid;
32
33 if (argc == 2 && strncmp(argv[1], "status", 6) == 0)
34 return cpu_status_all();
35
36 if (argc < 3)
37 return CMD_RET_USAGE;
38
39 cpuid = dectoul(argv[1], NULL);
40 if (!is_core_valid(cpuid)) {
41 printf ("Core num: %lu is not valid\n", cpuid);
42 return 1;
43 }
44
45 if (argc == 3) {
46 if (strncmp(argv[2], "reset", 5) == 0)
47 cpu_reset(cpuid);
48 else if (strncmp(argv[2], "status", 6) == 0)
49 cpu_status(cpuid);
50 else if (strncmp(argv[2], "disable", 7) == 0)
51 return cpu_disable(cpuid);
52 else
53 return CMD_RET_USAGE;
54
55 return 0;
56 }
57
58 /* 4 or greater, make sure its release */
59 if (strncmp(argv[2], "release", 7) != 0)
60 return CMD_RET_USAGE;
61
62 if (cpu_release(cpuid, argc - 3, argv + 3))
63 return CMD_RET_USAGE;
64
65 return 0;
66}
67
68U_BOOT_LONGHELP(cpu,
69 "<num> reset - Reset cpu <num>\n"
70 "cpu status - Status of all cpus\n"
71 "cpu <num> status - Status of cpu <num>\n"
72 "cpu <num> disable - Disable cpu <num>\n"
73 "cpu <num> release <addr> [args] - Release cpu <num> at <addr> with [args]"
74#ifdef CONFIG_PPC
75 "\n"
76 " [args] : <pir> <r3> <r6>\n" \
77 " pir - processor id (if writeable)\n" \
78 " r3 - value for gpr 3\n" \
79 " r6 - value for gpr 6\n" \
80 "\n" \
81 " Use '-' for any arg if you want the default value.\n" \
82 " Default for r3 is <num> and r6 is 0\n" \
83 "\n" \
84 " When cpu <num> is released r4 and r5 = 0.\n" \
85 " r7 will contain the size of the initial mapped area"
86#endif
87 );
88
89U_BOOT_CMD(
90 cpu, CONFIG_SYS_MAXARGS, 1, cpu_cmd,
91 "Multiprocessor CPU boot manipulation and release", cpu_help_text
92);