bootcount: Add bootcount command

Add a command to manipulate the bootcounter. This is useful if you can
run device recovery from inside U-Boot and need to reset the bootcounter
after executing that process as part of altbootcmd.

Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
This commit is contained in:
Alex Kiernan 2018-05-12 05:49:47 +00:00 committed by Tom Rini
parent c4d7b7a6b8
commit b11ed7d602
3 changed files with 69 additions and 0 deletions

View file

@ -1229,6 +1229,13 @@ config CMD_BMP
the image into RAM, then using this command to look at it or display
it.
config CMD_BOOTCOUNT
bool "bootcount"
depends on BOOTCOUNT_LIMIT
help
Enable the bootcount command, which allows interrogation and
reset of the bootcounter.
config CMD_BSP
bool "Enable board-specific commands"
help

View file

@ -22,6 +22,7 @@ obj-$(CONFIG_CMD_BEDBUG) += bedbug.o
obj-$(CONFIG_CMD_BINOP) += binop.o
obj-$(CONFIG_CMD_BLOCK_CACHE) += blkcache.o
obj-$(CONFIG_CMD_BMP) += bmp.o
obj-$(CONFIG_CMD_BOOTCOUNT) += bootcount.o
obj-$(CONFIG_CMD_BOOTEFI) += bootefi.o
obj-$(CONFIG_CMD_BOOTMENU) += bootmenu.o
obj-$(CONFIG_CMD_BOOTSTAGE) += bootstage.o

61
cmd/bootcount.c Normal file
View file

@ -0,0 +1,61 @@
// SPDX-License-Identifier: GPL-2.0+
#include <common.h>
#include <command.h>
#include <bootcount.h>
static int do_bootcount_print(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
{
printf("%lu\n", bootcount_load());
return CMD_RET_SUCCESS;
}
static int do_bootcount_reset(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
{
/*
* note that we're explicitly not resetting the environment
* variable, so you still have the old bootcounter available
*/
bootcount_store(0);
return CMD_RET_SUCCESS;
}
static cmd_tbl_t bootcount_sub[] = {
U_BOOT_CMD_MKENT(print, 1, 1, do_bootcount_print, "", ""),
U_BOOT_CMD_MKENT(reset, 1, 1, do_bootcount_reset, "", ""),
};
static int do_bootcount(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
{
cmd_tbl_t *cp;
if (argc < 2)
return CMD_RET_USAGE;
/* drop initial "bootcount" arg */
argc--;
argv++;
cp = find_cmd_tbl(argv[0], bootcount_sub, ARRAY_SIZE(bootcount_sub));
if (cp)
return cp->cmd(cmdtp, flag, argc, argv);
return CMD_RET_USAGE;
}
#if CONFIG_IS_ENABLED(SYS_LONGHELP)
static char bootcount_help_text[] =
"print - print current bootcounter\n"
"reset - reset the bootcounter"
;
#endif
U_BOOT_CMD(bootcount, 2, 1, do_bootcount,
"bootcount",
#if CONFIG_IS_ENABLED(SYS_LONGHELP)
bootcount_help_text
#endif
);