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[people/ms/u-boot.git] / doc / README.imx6

diff --git a/doc/README.imx6 b/doc/README.imx6
index 437af2fd9ae5eda9f8bdc30458f7117a1e9dc498..2e8f1d8a8abd4ab4e7af48eeebe814a2bc85bc5a 100644 (file)
--- a/doc/README.imx6
+++ b/doc/README.imx6
@@ -7,7 +7,10 @@ SoC.
 -----------------------------------
 
 1.1 MAC Address: It is stored in fuse bank 4, with the 32 lsbs in word 2 and the
-    16 msbs in word 3.
+    16 msbs in word 3[15:0].
+    For i.MX6SX and i.MX6UL, they have two MAC addresses. The second MAC address
+    is stored in fuse bank 4, with the 16 lsb in word 3[31:16] and the 32 msbs in 
+    word 4.
 
 Example:
 
@@ -34,7 +37,7 @@ As the fuses are arranged in banks of 8 words:
 bank = 4
 word = 2
 
-And the U-boot command would be:
+And the U-Boot command would be:
 
 => fuse read 4 2
 Reading bank 4:
@@ -55,7 +58,7 @@ As the fuses are arranged in banks of 8 words:
 bank = 4
 word = 3
 
-And the U-boot command would be:
+And the U-Boot command would be:
 
 => fuse read 4 3
 Reading bank 4:
@@ -84,3 +87,77 @@ Address:
 Reading bank 4:
 
 Word 0x00000002: 9f027772 00000004
+
+2. Using imx_usb_loader for first install with SPL
+--------------------------------------------------
+
+imx_usb_loader is a very nice tool by Boundary Devices that
+allow to install U-Boot without a JTAG debugger, using
+the USB boot mode as described in the manual. It is
+a replacement for Freescale's MFGTOOLS.
+
+The sources can be found here:
+
+       https://github.com/boundarydevices/imx_usb_loader.git
+
+Booting in USB mode, the i.MX6 announces itself to the Linux Host as:
+
+Bus 001 Device 111: ID 15a2:0061 Freescale Semiconductor, Inc.
+
+imx_usb_loader is able to download a single file (u-boot.imx)
+to the board. For boards without SPL support, it is enough to
+issue the command:
+
+       sudo ../imx_usb_loader/imx_usb -v u-boot.imx
+
+In order to load SPL and u-boot.img via imx_usb_loader tool,
+please refer to doc/README.sdp.
+
+3. Using Secure Boot on i.MX6 machines with SPL support
+-------------------------------------------------------
+
+This version of U-Boot is able to build a signable version of the SPL
+as well as a signable version of the U-Boot image. The signature can
+be verified through High Assurance Boot (HAB).
+
+CONFIG_SECURE_BOOT is needed to build those two binaries.
+After building, you need to create a command sequence file and use
+Freescales Code Signing Tool to sign both binaries. After creation,
+the mkimage tool outputs the required information about the HAB Blocks
+parameter for the CSF. During the build, the information is preserved
+in log files named as the binaries. (SPL.log and u-boot-ivt.log).
+
+More information about the CSF and HAB can be found in the AN4581.
+https://cache.freescale.com/files/32bit/doc/app_note/AN4581.pdf
+
+We don't want to explain how to create a PKI tree or SRK table as
+this is well explained in the Application Note.
+
+Example Output of the SPL (imximage) creation:
+ Image Type:   Freescale IMX Boot Image
+ Image Ver:    2 (i.MX53/6/7 compatible)
+ Mode:         DCD
+ Data Size:    61440 Bytes = 60.00 kB = 0.06 MB
+ Load Address: 00907420
+ Entry Point:  00908000
+ HAB Blocks:   00907400 00000000 0000cc00
+
+Example Output of the u-boot-ivt.img (firmware_ivt) creation:
+ Image Name:   U-Boot 2016.11-rc1-31589-g2a4411
+ Created:      Sat Nov  5 21:53:28 2016
+ Image Type:   ARM U-Boot Firmware with HABv4 IVT (uncompressed)
+ Data Size:    352192 Bytes = 343.94 kB = 0.34 MB
+ Load Address: 17800000
+ Entry Point:  00000000
+ HAB Blocks:   0x177fffc0   0x0000   0x00054020
+
+The CST (Code Signing Tool) can be downloaded from NXP.
+# Compile CSF and create signature
+./cst --o csf-u-boot.bin < command_sequence_uboot.csf
+./cst --o csf-SPL.bin < command_sequence_spl.csf
+# Append compiled CSF to Binary
+cat SPL csf-SPL.bin > SPL-signed
+cat u-boot-ivt.img csf-u-boot.bin > u-boot-signed.img
+
+These two signed binaries can be used on an i.MX6 in closed
+configuration when the according SRK Table Hash has been flashed.