arch/all-pc/boot/grub2-aros/grub-core/commands/i386/pc/lsapm.c

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 2010  Free Software Foundation, Inc.
   4  *
   5  *  GRUB is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  GRUB is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <grub/machine/int.h>
  20 #include <grub/machine/apm.h>
  21 #include <grub/dl.h>
  22 #include <grub/command.h>
  23 #include <grub/i18n.h>
  24
  25 GRUB_MOD_LICENSE ("GPLv3+");
  26
  27 int
  28 grub_apm_get_info (struct grub_apm_info *info)
  29 {
  30   struct grub_bios_int_registers regs;
  31
  32   /* detect APM */
  33   regs.eax = 0x5300;
  34   regs.ebx = 0;
  35   regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
  36   grub_bios_interrupt (0x15, &regs);
  37
  38   if (regs.flags & GRUB_CPU_INT_FLAGS_CARRY)
  39     return 0;
  40   info->version = regs.eax & 0xffff;
  41   info->flags = regs.ecx & 0xffff;
  42
  43   /* disconnect APM first */
  44   regs.eax = 0x5304;
  45   regs.ebx = 0;
  46   regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
  47   grub_bios_interrupt (0x15, &regs);
  48
  49   /* connect APM */
  50   regs.eax = 0x5303;
  51   regs.ebx = 0;
  52   regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
  53   grub_bios_interrupt (0x15, &regs);
  54
  55   if (regs.flags & GRUB_CPU_INT_FLAGS_CARRY)
  56     return 0;
  57
  58   info->cseg = regs.eax & 0xffff;
  59   info->offset = regs.ebx;
  60   info->cseg_16 = regs.ecx & 0xffff;
  61   info->dseg = regs.edx & 0xffff;
  62   info->cseg_len = regs.esi >> 16;
  63   info->cseg_16_len = regs.esi & 0xffff;
  64   info->dseg_len = regs.edi;
  65
  66   return 1;
  67 }
  68
  69 static grub_err_t
  70 grub_cmd_lsapm (grub_command_t cmd __attribute__ ((unused)),
  71                 int argc __attribute__ ((unused)), char **args __attribute__ ((unused)))
  72 {
  73   struct grub_apm_info info;
  74   if (!grub_apm_get_info (&info))
  75     return grub_error (GRUB_ERR_IO, N_("no APM found"));
  76
  77   grub_printf_ (N_("Version %u.%u\n"
  78                    "32-bit CS = 0x%x, len = 0x%x, offset = 0x%x\n"
  79                    "16-bit CS = 0x%x, len = 0x%x\n"
  80                    "DS = 0x%x, len = 0x%x\n"),
  81                 info.version >> 8, info.version & 0xff,
  82                 info.cseg, info.cseg_len, info.offset,
  83                 info.cseg_16, info.cseg_16_len,
  84                 info.dseg, info.dseg_len);
  85   grub_xputs (info.flags & GRUB_APM_FLAGS_16BITPROTECTED_SUPPORTED
  86               ? _("16-bit protected interface supported\n")
  87               : _("16-bit protected interface unsupported\n"));
  88   grub_xputs (info.flags & GRUB_APM_FLAGS_32BITPROTECTED_SUPPORTED
  89               ? _("32-bit protected interface supported\n")
  90               : _("32-bit protected interface unsupported\n"));
  91   grub_xputs (info.flags & GRUB_APM_FLAGS_CPUIDLE_SLOWS_DOWN
  92               ? _("CPU Idle slows down processor\n")
  93               : _("CPU Idle doesn't slow down processor\n"));
  94   grub_xputs (info.flags & GRUB_APM_FLAGS_DISABLED
  95               ? _("APM disabled\n") : _("APM enabled\n"));
  96   grub_xputs (info.flags & GRUB_APM_FLAGS_DISENGAGED
  97               ? _("APM disengaged\n") : _("APM engaged\n"));
  98
  99   return GRUB_ERR_NONE;
 100 }
 101
 102 static grub_command_t cmd;
 103
 104 GRUB_MOD_INIT(lsapm)
 105 {
 106   cmd = grub_register_command ("lsapm", grub_cmd_lsapm, 0,
 107                               N_("Show APM information."));
 108 }
 109
 110 GRUB_MOD_FINI(lsapm)
 111 {
 112   grub_unregister_command (cmd);
 113 }
 114
 115