From 6e7a315eb67cb6c113cf37e1d66c4f11a51a2b3e Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 18:29:51 +0200 Subject: Adding upstream version 2.06. Signed-off-by: Daniel Baumann --- grub-core/commands/i386/cmostest.c | 124 +++++++++++++++++++++++++++++++++++++ 1 file changed, 124 insertions(+) create mode 100644 grub-core/commands/i386/cmostest.c (limited to 'grub-core/commands/i386/cmostest.c') diff --git a/grub-core/commands/i386/cmostest.c b/grub-core/commands/i386/cmostest.c new file mode 100644 index 0000000..9f6b56a --- /dev/null +++ b/grub-core/commands/i386/cmostest.c @@ -0,0 +1,124 @@ +/* + * 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 . + */ + +#include +#include +#include +#include +#include + +GRUB_MOD_LICENSE ("GPLv3+"); + +static grub_err_t +parse_args (int argc, char *argv[], int *byte, int *bit) +{ + const 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 = 0, bit = 0; + grub_err_t err; + grub_uint8_t value; + + err = parse_args (argc, argv, &byte, &bit); + if (err) + return err; + + err = grub_cmos_read (byte, &value); + if (err) + return err; + + if (value & (1 << bit)) + return GRUB_ERR_NONE; + + return grub_error (GRUB_ERR_TEST_FAILURE, N_("false")); +} + +static grub_err_t +grub_cmd_cmosclean (struct grub_command *cmd __attribute__ ((unused)), + int argc, char *argv[]) +{ + int byte = 0, bit = 0; + grub_err_t err; + grub_uint8_t value; + + err = parse_args (argc, argv, &byte, &bit); + if (err) + return err; + err = grub_cmos_read (byte, &value); + if (err) + return err; + + return grub_cmos_write (byte, value & (~(1 << bit))); +} + +static grub_err_t +grub_cmd_cmosset (struct grub_command *cmd __attribute__ ((unused)), + int argc, char *argv[]) +{ + int byte = 0, bit = 0; + grub_err_t err; + grub_uint8_t value; + + err = parse_args (argc, argv, &byte, &bit); + if (err) + return err; + err = grub_cmos_read (byte, &value); + if (err) + return err; + + return grub_cmos_write (byte, value | (1 << bit)); +} + +static grub_command_t cmd, cmd_clean, cmd_set; + + +GRUB_MOD_INIT(cmostest) +{ + cmd = grub_register_command ("cmostest", grub_cmd_cmostest, + N_("BYTE:BIT"), + N_("Test bit at BYTE:BIT in CMOS.")); + cmd_clean = grub_register_command ("cmosclean", grub_cmd_cmosclean, + N_("BYTE:BIT"), + N_("Clear bit at BYTE:BIT in CMOS.")); + cmd_set = grub_register_command ("cmosset", grub_cmd_cmosset, + N_("BYTE:BIT"), + /* TRANSLATORS: A bit may be either set (1) or clear (0). */ + N_("Set bit at BYTE:BIT in CMOS.")); +} + +GRUB_MOD_FINI(cmostest) +{ + grub_unregister_command (cmd); + grub_unregister_command (cmd_clean); + grub_unregister_command (cmd_set); +} -- cgit v1.2.3