114 lines
3.3 KiB
C
114 lines
3.3 KiB
C
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2010 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/machine/int.h>
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#include <grub/machine/apm.h>
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#include <grub/dl.h>
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#include <grub/command.h>
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#include <grub/i18n.h>
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int
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grub_apm_get_info (struct grub_apm_info *info)
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{
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struct grub_bios_int_registers regs;
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/* detect APM */
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regs.eax = 0x5300;
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regs.ebx = 0;
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regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
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grub_bios_interrupt (0x15, ®s);
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if (regs.flags & GRUB_CPU_INT_FLAGS_CARRY)
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return 0;
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info->version = regs.eax & 0xffff;
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info->flags = regs.ecx & 0xffff;
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/* disconnect APM first */
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regs.eax = 0x5304;
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regs.ebx = 0;
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regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
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grub_bios_interrupt (0x15, ®s);
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/* connect APM */
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regs.eax = 0x5303;
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regs.ebx = 0;
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regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
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grub_bios_interrupt (0x15, ®s);
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if (regs.flags & GRUB_CPU_INT_FLAGS_CARRY)
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return 0;
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info->cseg = regs.eax & 0xffff;
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info->offset = regs.ebx;
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info->cseg_16 = regs.ecx & 0xffff;
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info->dseg = regs.edx & 0xffff;
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info->cseg_len = regs.esi >> 16;
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info->cseg_16_len = regs.esi & 0xffff;
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info->dseg_len = regs.edi;
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return 1;
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}
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static grub_err_t
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grub_cmd_lsapm (grub_command_t cmd __attribute__ ((unused)),
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int argc __attribute__ ((unused)), char **args __attribute__ ((unused)))
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{
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struct grub_apm_info info;
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if (!grub_apm_get_info (&info))
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return grub_error (GRUB_ERR_IO, "no APM found");
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grub_printf ("Vesion %u.%u\n"
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"32-bit CS = 0x%x, len = 0x%x, offset = 0x%x\n"
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"16-bit CS = 0x%x, len = 0x%x\n"
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"DS = 0x%x, len = 0x%x\n",
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info.version >> 8, info.version & 0xff,
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info.cseg, info.cseg_len, info.offset,
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info.cseg_16, info.cseg_16_len,
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info.dseg, info.dseg_len);
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grub_xputs (info.flags & GRUB_APM_FLAGS_16BITPROTECTED_SUPPORTED
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? "16-bit protected interface supported\n"
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: "16-bit protected interface unsupported\n");
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grub_xputs (info.flags & GRUB_APM_FLAGS_32BITPROTECTED_SUPPORTED
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? "32-bit protected interface supported\n"
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: "32-bit protected interface unsupported\n");
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grub_xputs (info.flags & GRUB_APM_FLAGS_CPUIDLE_SLOWS_DOWN
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? "CPU Idle slows down processor\n"
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: "CPU Idle doesn't slow down processor\n");
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grub_xputs (info.flags & GRUB_APM_FLAGS_DISABLED
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? "APM disabled\n" : "APM enabled\n");
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grub_xputs (info.flags & GRUB_APM_FLAGS_DISENGAGED
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? "APM disengaged\n" : "APM engaged\n");
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return GRUB_ERR_NONE;
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}
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static grub_command_t cmd;
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GRUB_MOD_INIT(lsapm)
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{
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cmd = grub_register_command ("lsapm", grub_cmd_lsapm, 0,
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N_("Show APM information."));
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}
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GRUB_MOD_FINI(lsapm)
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{
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grub_unregister_command (cmd);
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}
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