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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2009 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/dl.h>
#include <grub/command.h>
#include <grub/misc.h>
#include <grub/cmos.h>
GRUB_MOD_LICENSE ("GPLv3+");
static grub_err_t
parse_args (int argc, char *argv[], int *byte, int *bit)
{
char *rest;
if (argc != 1)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "Address required.");
*byte = grub_strtoul (argv[0], &rest, 0);
if (*rest != ':')
return grub_error (GRUB_ERR_BAD_ARGUMENT, "Address required.");
*bit = grub_strtoul (rest + 1, 0, 0);
return GRUB_ERR_NONE;
}
static grub_err_t
grub_cmd_cmostest (struct grub_command *cmd __attribute__ ((unused)),
int argc, char *argv[])
{
int byte, bit;
grub_err_t err;
err = parse_args (argc, argv, &byte, &bit);
if (err)
return err;
if (grub_cmos_read (byte) & (1 << bit))
return GRUB_ERR_NONE;
return grub_error (GRUB_ERR_TEST_FAILURE, "false");
}
static grub_err_t
grub_cmd_cmosclean (struct grub_command *cmd __attribute__ ((unused)),
int argc, char *argv[])
{
int byte, bit;
grub_err_t err;
err = parse_args (argc, argv, &byte, &bit);
if (err)
return err;
grub_cmos_write (byte, grub_cmos_read (byte) & (~(1 << bit)));
return GRUB_ERR_NONE;
}
static grub_command_t cmd, cmd_clean;
GRUB_MOD_INIT(cmostest)
{
cmd = grub_register_command ("cmostest", grub_cmd_cmostest,
"cmostest BYTE:BIT",
"Test bit at BYTE:BIT in CMOS.");
cmd_clean = grub_register_command ("cmosclean", grub_cmd_cmosclean,
"cmosclean BYTE:BIT",
"Clean bit at BYTE:BIT in CMOS.");
}
GRUB_MOD_FINI(cmostest)
{
grub_unregister_command (cmd);
grub_unregister_command (cmd_clean);
}
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