diff options
Diffstat (limited to 'grub-core/commands/i386/pc/lsapm.c')
| -rw-r--r-- | grub-core/commands/i386/pc/lsapm.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/grub-core/commands/i386/pc/lsapm.c b/grub-core/commands/i386/pc/lsapm.c new file mode 100644 index 0000000..c82476d --- /dev/null +++ b/grub-core/commands/i386/pc/lsapm.c @@ -0,0 +1,115 @@ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2010 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/machine/int.h> +#include <grub/machine/apm.h> +#include <grub/dl.h> +#include <grub/command.h> +#include <grub/i18n.h> + +GRUB_MOD_LICENSE ("GPLv3+"); + +int +grub_apm_get_info (struct grub_apm_info *info) +{ + struct grub_bios_int_registers regs; + + /* detect APM */ + regs.eax = 0x5300; + regs.ebx = 0; + regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT; + grub_bios_interrupt (0x15, ®s); + + if (regs.flags & GRUB_CPU_INT_FLAGS_CARRY) + return 0; + info->version = regs.eax & 0xffff; + info->flags = regs.ecx & 0xffff; + + /* disconnect APM first */ + regs.eax = 0x5304; + regs.ebx = 0; + regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT; + grub_bios_interrupt (0x15, ®s); + + /* connect APM */ + regs.eax = 0x5303; + regs.ebx = 0; + regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT; + grub_bios_interrupt (0x15, ®s); + + if (regs.flags & GRUB_CPU_INT_FLAGS_CARRY) + return 0; + + info->cseg = regs.eax & 0xffff; + info->offset = regs.ebx; + info->cseg_16 = regs.ecx & 0xffff; + info->dseg = regs.edx & 0xffff; + info->cseg_len = regs.esi >> 16; + info->cseg_16_len = regs.esi & 0xffff; + info->dseg_len = regs.edi; + + return 1; +} + +static grub_err_t +grub_cmd_lsapm (grub_command_t cmd __attribute__ ((unused)), + int argc __attribute__ ((unused)), char **args __attribute__ ((unused))) +{ + struct grub_apm_info info; + if (!grub_apm_get_info (&info)) + return grub_error (GRUB_ERR_IO, N_("no APM found")); + + grub_printf_ (N_("Version %u.%u\n" + "32-bit CS = 0x%x, len = 0x%x, offset = 0x%x\n" + "16-bit CS = 0x%x, len = 0x%x\n" + "DS = 0x%x, len = 0x%x\n"), + info.version >> 8, info.version & 0xff, + info.cseg, info.cseg_len, info.offset, + info.cseg_16, info.cseg_16_len, + info.dseg, info.dseg_len); + grub_xputs (info.flags & GRUB_APM_FLAGS_16BITPROTECTED_SUPPORTED + ? _("16-bit protected interface supported\n") + : _("16-bit protected interface unsupported\n")); + grub_xputs (info.flags & GRUB_APM_FLAGS_32BITPROTECTED_SUPPORTED + ? _("32-bit protected interface supported\n") + : _("32-bit protected interface unsupported\n")); + grub_xputs (info.flags & GRUB_APM_FLAGS_CPUIDLE_SLOWS_DOWN + ? _("CPU Idle slows down processor\n") + : _("CPU Idle doesn't slow down processor\n")); + grub_xputs (info.flags & GRUB_APM_FLAGS_DISABLED + ? _("APM disabled\n") : _("APM enabled\n")); + grub_xputs (info.flags & GRUB_APM_FLAGS_DISENGAGED + ? _("APM disengaged\n") : _("APM engaged\n")); + + return GRUB_ERR_NONE; +} + +static grub_command_t cmd; + +GRUB_MOD_INIT(lsapm) +{ + cmd = grub_register_command ("lsapm", grub_cmd_lsapm, 0, + N_("Show APM information.")); +} + +GRUB_MOD_FINI(lsapm) +{ + grub_unregister_command (cmd); +} + + |