1 files changed, 112 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/gpxe/src/interface/efi/efi_init.c b/contrib/syslinux-4.02/gpxe/src/interface/efi/efi_init.c
new file mode 100644
index 0000000..ad55037
--- /dev/null
+++ b/contrib/syslinux-4.02/gpxe/src/interface/efi/efi_init.c
@@ -0,0 +1,112 @@
+/*
+ * Copyright (C) 2008 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program 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 2 of the
+ * License, or any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <string.h>
+#include <gpxe/efi/efi.h>
+#include <gpxe/uuid.h>
+
+/** Image handle passed to entry point */
+EFI_HANDLE efi_image_handle;
+
+/** System table passed to entry point */
+EFI_SYSTEM_TABLE *efi_systab;
+
+/**
+ * Look up EFI configuration table
+ *
+ * @v guid		Configuration table GUID
+ * @ret table		Configuration table, or NULL
+ */
+static void * efi_find_table ( EFI_GUID *guid ) {
+	unsigned int i;
+
+	for ( i = 0 ; i < efi_systab->NumberOfTableEntries ; i++ ) {
+		if ( memcmp ( &efi_systab->ConfigurationTable[i].VendorGuid,
+			      guid, sizeof ( *guid ) ) == 0 )
+			return efi_systab->ConfigurationTable[i].VendorTable;
+	}
+
+	return NULL;
+}
+
+/**
+ * Initialise EFI environment
+ *
+ * @v image_handle	Image handle
+ * @v systab		System table
+ * @ret efirc		EFI return status code
+ */
+EFI_STATUS efi_init ( EFI_HANDLE image_handle,
+		      EFI_SYSTEM_TABLE *systab ) {
+	EFI_BOOT_SERVICES *bs;
+	struct efi_protocol *prot;
+	struct efi_config_table *tab;
+	EFI_STATUS efirc;
+
+	/* Store image handle and system table pointer for future use */
+	efi_image_handle = image_handle;
+	efi_systab = systab;
+
+	/* Sanity checks */
+	if ( ! systab )
+		return EFI_NOT_AVAILABLE_YET;
+	if ( ! systab->ConOut )
+		return EFI_NOT_AVAILABLE_YET;
+	if ( ! systab->BootServices ) {
+		DBGC ( systab, "EFI provided no BootServices entry point\n" );
+		return EFI_NOT_AVAILABLE_YET;
+	}
+	if ( ! systab->RuntimeServices ) {
+		DBGC ( systab, "EFI provided no RuntimeServices entry "
+		       "point\n" );
+		return EFI_NOT_AVAILABLE_YET;
+	}
+	DBGC ( systab, "EFI handle %p systab %p\n", image_handle, systab );
+
+	/* Look up used protocols */
+	bs = systab->BootServices;
+	for_each_table_entry ( prot, EFI_PROTOCOLS ) {
+		if ( ( efirc = bs->LocateProtocol ( &prot->u.guid, NULL,
+						    prot->protocol ) ) == 0 ) {
+			DBGC ( systab, "EFI protocol %s is at %p\n",
+			       uuid_ntoa ( &prot->u.uuid ), *(prot->protocol));
+		} else {
+			DBGC ( systab, "EFI does not provide protocol %s\n",
+			       uuid_ntoa ( &prot->u.uuid ) );
+			/* All protocols are required */
+			return efirc;
+		}
+	}
+
+	/* Look up used configuration tables */
+	for_each_table_entry ( tab, EFI_CONFIG_TABLES ) {
+		if ( ( *(tab->table) = efi_find_table ( &tab->u.guid ) ) ) {
+			DBGC ( systab, "EFI configuration table %s is at %p\n",
+			       uuid_ntoa ( &tab->u.uuid ), *(tab->table) );
+		} else {
+			DBGC ( systab, "EFI does not provide configuration "
+			       "table %s\n", uuid_ntoa ( &tab->u.uuid ) );
+			if ( tab->required )
+				return EFI_NOT_AVAILABLE_YET;
+		}
+	}
+
+	return 0;
+}