aboutsummaryrefslogtreecommitdiff
path: root/include/bl1/bl1.h
diff options
context:
space:
mode:
authorYatharth Kochar <yatharth.kochar@arm.com>2015-10-10 19:06:53 +0100
committerYatharth Kochar <yatharth.kochar@arm.com>2015-12-09 17:41:18 +0000
commit48bfb88eb6087bb3a293a13a0f702a0e40466b14 (patch)
treebdef7c2d9c48f232c83965d43fc01e7cca59e2c2 /include/bl1/bl1.h
parent7baff11fb51c2739d1c0fbac894c75b3c4b242e2 (diff)
downloadtrusted-firmware-a-48bfb88eb6087bb3a293a13a0f702a0e40466b14.tar.gz
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
Diffstat (limited to 'include/bl1/bl1.h')
-rw-r--r--include/bl1/bl1.h98
1 files changed, 98 insertions, 0 deletions
diff --git a/include/bl1/bl1.h b/include/bl1/bl1.h
new file mode 100644
index 0000000000..9fb3cb2837
--- /dev/null
+++ b/include/bl1/bl1.h
@@ -0,0 +1,98 @@
+/*
+ * 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.
+ */
+
+#ifndef __BL1_FWU_H__
+#define __BL1_FWU_H__
+
+#include <bl_common.h>
+
+/*
+ * Defines for BL1 SMC function ids.
+ */
+#define BL1_SMC_CALL_COUNT 0x0
+#define BL1_SMC_UID 0x1
+/* SMC #0x2 reserved */
+#define BL1_SMC_VERSION 0x3
+
+/*
+ * Corresponds to the function ID of the SMC that
+ * the BL1 exception handler service to execute BL31.
+ */
+#define BL1_SMC_RUN_IMAGE 0x4
+
+/*
+ * BL1 SMC version
+ */
+#define BL1_SMC_MAJOR_VER 0x0
+#define BL1_SMC_MINOR_VER 0x1
+
+/*
+ * Defines for FWU SMC function ids.
+ */
+
+#define FWU_SMC_IMAGE_COPY 0x10
+#define FWU_SMC_IMAGE_AUTH 0x11
+#define FWU_SMC_IMAGE_EXECUTE 0x12
+#define FWU_SMC_IMAGE_RESUME 0x13
+#define FWU_SMC_SEC_IMAGE_DONE 0x14
+#define FWU_SMC_UPDATE_DONE 0x15
+
+/*
+ * Number of FWU calls (above) implemented
+ */
+#define FWU_NUM_SMC_CALLS 6
+
+#if TRUSTED_BOARD_BOOT
+# define BL1_NUM_SMC_CALLS (FWU_NUM_SMC_CALLS + 4)
+#else
+# define BL1_NUM_SMC_CALLS 4
+#endif
+
+/*
+ * The macros below are used to identify FWU
+ * calls from the SMC function ID
+ */
+#define FWU_SMC_FID_START FWU_SMC_IMAGE_COPY
+#define FWU_SMC_FID_END FWU_SMC_UPDATE_DONE
+#define is_fwu_fid(_fid) \
+ ((_fid >= FWU_SMC_FID_START) && (_fid <= FWU_SMC_FID_END))
+
+#ifndef __ASSEMBLY__
+#include <cassert.h>
+
+/*
+ * Check if the total number of FWU SMC calls are as expected.
+ */
+CASSERT(FWU_NUM_SMC_CALLS == \
+ (FWU_SMC_FID_END - FWU_SMC_FID_START + 1),\
+ assert_FWU_NUM_SMC_CALLS_mismatch);
+
+#endif /* __ASSEMBLY__ */
+#endif /* __BL1_FWU_H__ */