2N/A/*
2N/A * GRUB -- GRand Unified Bootloader
2N/A * Copyright (C) 2009 Free Software Foundation, Inc.
2N/A *
2N/A * GRUB is free software: you can redistribute it and/or modify
2N/A * it under the terms of the GNU General Public License as published by
2N/A * the Free Software Foundation, either version 3 of the License, or
2N/A * (at your option) any later version.
2N/A *
2N/A * GRUB is distributed in the hope that it will be useful,
2N/A * but WITHOUT ANY WARRANTY; without even the implied warranty of
2N/A * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2N/A * GNU General Public License for more details.
2N/A *
2N/A * You should have received a copy of the GNU General Public License
2N/A * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
2N/A */
2N/A
2N/A#include <grub/dl.h>
2N/A#include <grub/command.h>
2N/A#include <grub/misc.h>
2N/A#include <grub/cmos.h>
2N/A#include <grub/i18n.h>
2N/A
2N/AGRUB_MOD_LICENSE ("GPLv3+");
2N/A
2N/Astatic grub_err_t
2N/Aparse_args (int argc, char *argv[], int *byte, int *bit)
2N/A{
2N/A char *rest;
2N/A
2N/A if (argc != 1)
2N/A return grub_error (GRUB_ERR_BAD_ARGUMENT, "Address required.");
2N/A
2N/A *byte = grub_strtoul (argv[0], &rest, 0);
2N/A if (*rest != ':')
2N/A return grub_error (GRUB_ERR_BAD_ARGUMENT, "Address required.");
2N/A
2N/A *bit = grub_strtoul (rest + 1, 0, 0);
2N/A
2N/A return GRUB_ERR_NONE;
2N/A}
2N/A
2N/Astatic grub_err_t
2N/Agrub_cmd_cmostest (struct grub_command *cmd __attribute__ ((unused)),
2N/A int argc, char *argv[])
2N/A{
2N/A int byte, bit;
2N/A grub_err_t err;
2N/A grub_uint8_t value;
2N/A
2N/A err = parse_args (argc, argv, &byte, &bit);
2N/A if (err)
2N/A return err;
2N/A
2N/A err = grub_cmos_read (byte, &value);
2N/A if (err)
2N/A return err;
2N/A
2N/A if (value & (1 << bit))
2N/A return GRUB_ERR_NONE;
2N/A
2N/A return grub_error (GRUB_ERR_TEST_FAILURE, "false");
2N/A}
2N/A
2N/Astatic grub_err_t
2N/Agrub_cmd_cmosclean (struct grub_command *cmd __attribute__ ((unused)),
2N/A int argc, char *argv[])
2N/A{
2N/A int byte, bit;
2N/A grub_err_t err;
2N/A grub_uint8_t value;
2N/A
2N/A err = parse_args (argc, argv, &byte, &bit);
2N/A if (err)
2N/A return err;
2N/A err = grub_cmos_read (byte, &value);
2N/A if (err)
2N/A return err;
2N/A
2N/A return grub_cmos_write (byte, value & (~(1 << bit)));
2N/A}
2N/A
2N/Astatic grub_command_t cmd, cmd_clean;
2N/A
2N/A
2N/AGRUB_MOD_INIT(cmostest)
2N/A{
2N/A cmd = grub_register_command ("cmostest", grub_cmd_cmostest,
2N/A N_("BYTE:BIT"),
2N/A N_("Test bit at BYTE:BIT in CMOS."));
2N/A cmd_clean = grub_register_command ("cmosclean", grub_cmd_cmosclean,
2N/A N_("BYTE:BIT"),
2N/A N_("Clean bit at BYTE:BIT in CMOS."));
2N/A}
2N/A
2N/AGRUB_MOD_FINI(cmostest)
2N/A{
2N/A grub_unregister_command (cmd);
2N/A grub_unregister_command (cmd_clean);
2N/A}