FWU: Add Generic Firmware Update framework support in BL1

Firmware update(a.k.a FWU) feature is part of the TBB architecture.
BL1 is responsible for carrying out the FWU process if platform
specific code detects that it is needed.

This patch adds support for FWU feature support in BL1 which is
included by enabling `TRUSTED_BOARD_BOOT` compile time flag.

This patch adds bl1_fwu.c which contains all the core operations
of FWU, which are; SMC handler, image copy, authentication, execution
and resumption. It also adds bl1.h introducing #defines for all
BL1 SMCs.

Following platform porting functions are introduced:

int bl1_plat_mem_check(uintptr_t mem_base, unsigned int mem_size,
unsigned int flags);
	This function can be used to add platform specific memory checks
	for the provided base/size for the given security state.
	The weak definition will invoke `assert()` and return -ENOMEM.

__dead2 void bl1_plat_fwu_done(void *cookie, void *reserved);
	This function can be used to initiate platform specific procedure
	to mark completion of the FWU process.
	The weak definition waits forever calling `wfi()`.

plat_bl1_common.c contains weak definitions for above functions.

FWU process starts when platform detects it and return the image_id
other than BL2_IMAGE_ID by using `bl1_plat_get_next_image_id()` in
`bl1_main()`.

NOTE: User MUST provide platform specific real definition for
bl1_plat_mem_check() in order to use it for Firmware update.

Change-Id: Ice189a0885d9722d9e1dd03f76cac1aceb0e25ed

1 files changed, 81 insertions, 0 deletions

diff --git a/bl1/tbbr/tbbr_img_desc.c b/bl1/tbbr/tbbr_img_desc.c
new file mode 100644
index 00000000..42de8517
--- /dev/null
+++ b/bl1/tbbr/tbbr_img_desc.c
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <bl1.h>
+#include <bl_common.h>
+#include <platform_def.h>
+
+image_desc_t bl1_tbbr_image_descs[] = {
+    {
+	    .image_id = FWU_CERT_ID,
+	    .image_info.h.attr = SET_EXEC_STATE(NON_EXECUTABLE),
+	    .image_info.image_base = BL2_BASE,
+	    .ep_info.h.attr = SET_SEC_STATE(SECURE),
+    },
+#if NS_BL1U_BASE
+    {
+	    .image_id = NS_BL1U_IMAGE_ID,
+	    .image_info.h.attr = SET_EXEC_STATE(EXECUTABLE),
+	    .image_info.image_base = NS_BL1U_BASE,
+	    .ep_info.h.attr = SET_SEC_STATE(NON_SECURE),
+	    .ep_info.pc = NS_BL1U_BASE,
+    },
+#endif
+#if SCP_BL2U_BASE
+    {
+	    .image_id = SCP_BL2U_IMAGE_ID,
+	    .image_info.h.attr = SET_EXEC_STATE(NON_EXECUTABLE),
+	    .image_info.image_base = SCP_BL2U_BASE,
+	    .ep_info.h.attr = SET_SEC_STATE(SECURE),
+    },
+#endif
+#if BL2U_BASE
+    {
+	    .image_id = BL2U_IMAGE_ID,
+	    .image_info.h.attr = SET_EXEC_STATE(EXECUTABLE),
+	    .image_info.image_base = BL2U_BASE,
+	    .ep_info.h.attr = SET_SEC_STATE(SECURE),
+	    .ep_info.pc = BL2U_BASE,
+    },
+#endif
+#if NS_BL2U_BASE
+    {
+	    .image_id = NS_BL2U_IMAGE_ID,
+	    .image_info.h.attr = SET_EXEC_STATE(NON_EXECUTABLE),
+	    .image_info.image_base = NS_BL2U_BASE,
+	    .ep_info.h.attr = SET_SEC_STATE(NON_SECURE),
+    },
+#endif
+	    BL2_IMAGE_DESC,
+
+    {
+	    .image_id = INVALID_IMAGE_ID,
+    }
+};