d43a5ee651
PIT isn't available on some of new hardware including Hyper-V. So use pmtimer for calibration. Moreover pmtimer calibration is faster, so use it on coreboor where booting time is important. Based on patch by Michael Chang.
59 lines
1.9 KiB
C
59 lines
1.9 KiB
C
/* acpi.c - get acpi tables. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2009 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/acpi.h>
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#include <grub/misc.h>
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#include <grub/efi/efi.h>
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#include <grub/efi/api.h>
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struct grub_acpi_rsdp_v10 *
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grub_machine_acpi_get_rsdpv1 (void)
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{
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unsigned i;
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static grub_efi_packed_guid_t acpi_guid = GRUB_EFI_ACPI_TABLE_GUID;
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for (i = 0; i < grub_efi_system_table->num_table_entries; i++)
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{
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grub_efi_packed_guid_t *guid =
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&grub_efi_system_table->configuration_table[i].vendor_guid;
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if (! grub_memcmp (guid, &acpi_guid, sizeof (grub_efi_packed_guid_t)))
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return (struct grub_acpi_rsdp_v10 *)
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grub_efi_system_table->configuration_table[i].vendor_table;
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}
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return 0;
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}
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struct grub_acpi_rsdp_v20 *
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grub_machine_acpi_get_rsdpv2 (void)
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{
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unsigned i;
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static grub_efi_packed_guid_t acpi20_guid = GRUB_EFI_ACPI_20_TABLE_GUID;
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for (i = 0; i < grub_efi_system_table->num_table_entries; i++)
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{
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grub_efi_packed_guid_t *guid =
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&grub_efi_system_table->configuration_table[i].vendor_guid;
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if (! grub_memcmp (guid, &acpi20_guid, sizeof (grub_efi_packed_guid_t)))
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return (struct grub_acpi_rsdp_v20 *)
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grub_efi_system_table->configuration_table[i].vendor_table;
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}
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return 0;
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}
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