[efi] Add EFI-specific debugging macros

Signed-off-by: Michael Brown <mcb30@ipxe.org>

1 files changed, 95 insertions, 0 deletions

diff --git a/src/interface/efi/efi_debug.c b/src/interface/efi/efi_debug.c
new file mode 100644
index 00000000..7f3c115d
--- /dev/null
+++ b/src/interface/efi/efi_debug.c
@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2013 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., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+/**
+ * @file
+ *
+ * EFI debugging utilities
+ *
+ */
+
+#include <stdio.h>
+#include <ipxe/efi/efi.h>
+#include <ipxe/efi/efi_driver.h>
+#include <ipxe/efi/Protocol/DevicePath.h>
+#include <ipxe/efi/Protocol/DevicePathToText.h>
+
+/** Device path to text protocol */
+static EFI_DEVICE_PATH_TO_TEXT_PROTOCOL *efidpt;
+EFI_REQUIRE_PROTOCOL ( EFI_DEVICE_PATH_TO_TEXT_PROTOCOL, &efidpt );
+
+/**
+ * Print list of protocol handlers attached to a handle
+ *
+ * @v handle		EFI handle
+ */
+void dbg_efi_protocols ( EFI_HANDLE handle ) {
+	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
+        EFI_GUID **protocols;
+	UINTN count;
+	unsigned int i;
+	EFI_STATUS efirc;
+
+	/* Retrieve list of protocols */
+	if ( ( efirc = bs->ProtocolsPerHandle ( handle, &protocols,
+						&count ) ) != 0 ) {
+		printf ( "EFI could not retrieve protocols for %p: %s\n",
+			 handle, efi_strerror ( efirc ) );
+		return;
+	}
+
+	/* Dump list of protocols */
+	for ( i = 0 ; i < count ; i++ ) {
+		printf ( "%s\n", uuid_ntoa ( ( union uuid * ) protocols[i] ) );
+	}
+
+	/* Free list */
+	bs->FreePool ( protocols );
+}
+
+/**
+ * Print device path
+ *
+ * @v path		Device path
+ */
+void dbg_efi_devpath ( EFI_DEVICE_PATH_PROTOCOL *path ) {
+	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
+	EFI_DEVICE_PATH_PROTOCOL *end;
+	CHAR16 *text;
+	size_t len;
+
+	/* Convert path to a textual representation */
+	text = efidpt->ConvertDevicePathToText ( path, TRUE, FALSE );
+	if ( ! text ) {
+		printf ( "<cannot convert>:\n" );
+		end = efi_devpath_end ( path );
+		len = ( ( ( void * ) end ) - ( ( void * ) path ) +
+			sizeof ( *end ) );
+		dbg_hex_dump_da ( 0, path, len );
+		return;
+	}
+
+	/* Print path */
+	printf ( "%ls", text );
+
+	/* Free path */
+	bs->FreePool ( text );
+}