X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=doc%2FREADME.imx6;h=2e8f1d8a8abd4ab4e7af48eeebe814a2bc85bc5a;hb=2ff1da9453030e02c1e750bd847c9b4dffb8f4a8;hp=437af2fd9ae5eda9f8bdc30458f7117a1e9dc498;hpb=7f673c99c2d8d1aa21996c5b914f06d784b080ca;p=u-boot diff --git a/doc/README.imx6 b/doc/README.imx6 index 437af2fd9a..2e8f1d8a8a 100644 --- 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.