diff options
Diffstat (limited to 'grub-core/commands/i386/cmostest.c')
-rw-r--r-- | grub-core/commands/i386/cmostest.c | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/grub-core/commands/i386/cmostest.c b/grub-core/commands/i386/cmostest.c new file mode 100644 index 0000000..c79bd03 --- /dev/null +++ b/grub-core/commands/i386/cmostest.c @@ -0,0 +1,92 @@ +/* + * 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); +} |