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[efi] Provide access to ACPI tables

Signed-off-by: Michael Brown <mcb30@ipxe.org>
tags/v1.20.1
Michael Brown 7 years ago
parent
commit
993fd2b451

+ 1
- 1
src/config/defaults/efi.h View File

@@ -21,7 +21,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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 #define ENTROPY_EFI
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 #define TIME_EFI
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 #define REBOOT_EFI
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-#define ACPI_NULL
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+#define ACPI_EFI
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 #define DOWNLOAD_PROTO_FILE	/* Local filesystem access */
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+ 1
- 0
src/include/ipxe/acpi.h View File

@@ -215,6 +215,7 @@ struct acpi_model {
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 /* Include all architecture-independent ACPI API headers */
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 #include <ipxe/null_acpi.h>
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+#include <ipxe/efi/efi_acpi.h>
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 /* Include all architecture-dependent ACPI API headers */
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 #include <bits/acpi.h>

+ 48
- 0
src/include/ipxe/efi/Guid/Acpi.h View File

@@ -0,0 +1,48 @@
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+/** @file
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+  GUIDs used for ACPI entries in the EFI system table
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+
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+  These GUIDs point the ACPI tables as defined in the ACPI specifications.
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+  ACPI 2.0 specification defines the ACPI 2.0 GUID. UEFI 2.0 defines the
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+  ACPI 2.0 Table GUID and ACPI Table GUID.
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+
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+  Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
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+  This program and the accompanying materials
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+  are licensed and made available under the terms and conditions of the BSD License
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+  which accompanies this distribution.  The full text of the license may be found at
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+  http://opensource.org/licenses/bsd-license.php
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+
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+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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+
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+  @par Revision Reference:
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+  GUIDs defined in UEFI 2.0 spec.
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+
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+**/
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+
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+#ifndef __ACPI_GUID_H__
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+#define __ACPI_GUID_H__
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+
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+FILE_LICENCE ( BSD3 );
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+
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+#define ACPI_TABLE_GUID \
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+  { \
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+    0xeb9d2d30, 0x2d88, 0x11d3, {0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d } \
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+  }
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+
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+#define EFI_ACPI_TABLE_GUID \
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+  { \
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+    0x8868e871, 0xe4f1, 0x11d3, {0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 } \
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+  }
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+
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+#define ACPI_10_TABLE_GUID     ACPI_TABLE_GUID
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+
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+//
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+// ACPI 2.0 or newer tables should use EFI_ACPI_TABLE_GUID.
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+//
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+#define EFI_ACPI_20_TABLE_GUID EFI_ACPI_TABLE_GUID
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+
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+extern EFI_GUID gEfiAcpiTableGuid;
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+extern EFI_GUID gEfiAcpi10TableGuid;
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+extern EFI_GUID gEfiAcpi20TableGuid;
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+
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+#endif

+ 18
- 0
src/include/ipxe/efi/efi_acpi.h View File

@@ -0,0 +1,18 @@
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+#ifndef _IPXE_EFI_ACPI_H
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+#define _IPXE_EFI_ACPI_H
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+
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+/** @file
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+ *
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+ * iPXE ACPI API for EFI
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+ *
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+ */
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+
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+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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+
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+#ifdef ACPI_EFI
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+#define ACPI_PREFIX_efi
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+#else
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+#define ACPI_PREFIX_efi __efi_
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+#endif
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+
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+#endif /* _IPXE_EFI_ACPI_H */

+ 56
- 0
src/interface/efi/efi_acpi.c View File

@@ -0,0 +1,56 @@
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+/*
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+ * Copyright (C) 2017 Michael Brown <mbrown@fensystems.co.uk>.
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License as
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+ * published by the Free Software Foundation; either version 2 of the
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+ * License, or any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful, but
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+ * WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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+ * 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 this program; if not, write to the Free Software
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+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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+ * 02110-1301, USA.
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+ *
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+ * You can also choose to distribute this program under the terms of
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+ * the Unmodified Binary Distribution Licence (as given in the file
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+ * COPYING.UBDL), provided that you have satisfied its requirements.
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+ */
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+
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+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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+
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+/**
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+ * @file
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+ *
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+ * iPXE ACPI API for EFI
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+ *
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+ */
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+
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+#include <ipxe/acpi.h>
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+#include <ipxe/efi/efi.h>
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+#include <ipxe/efi/Guid/Acpi.h>
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+#include <ipxe/efi/efi_acpi.h>
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+
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+/** ACPI configuration table */
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+static EFI_ACPI_1_0_ROOT_SYSTEM_DESCRIPTION_POINTER *rsdp;
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+EFI_USE_TABLE ( ACPI_10_TABLE, &rsdp, 0 );
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+
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+/**
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+ * Locate ACPI root system description table
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+ *
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+ * @ret rsdt		ACPI root system description table, or UNULL
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+ */
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+static userptr_t efi_find_rsdt ( void ) {
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+
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+	/* Locate RSDT via ACPI configuration table, if available */
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+	if ( rsdp )
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+		return phys_to_user ( rsdp->RsdtAddress );
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+
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+	return UNULL;
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+}
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+
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+PROVIDE_ACPI ( efi, acpi_find_rsdt, efi_find_rsdt );

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