![]() # expected output: MMC write: dev # 1, block # 138, count 644. # expected output: 329312 bytes read in 38 ms (8.3 MiB/s) # expected output: MMC write: dev # 1, block # 2, count 102. # expected output: 52224 bytes read in 24 ms (2.1 MiB/s) # expected output: 1 Storage Device(s) found Below are the steps for loading binaries from a USB drive and writing them to eMMC: Now that at least U-Boot is running on the target system, SPL and u-boot.img can be loaded from removable media or network, and then written to the eMMC. Refer to section Booting from USB (OTG) how to load u-boot to RAM. However it is more likely that neither Linux nor even U-Boot are available at this point. In this case the previous section can be used, where sdX is replaced with mmcblk1. If Linux is already running on the device, the procedure is identical to microSD. The special purpose boot partitions are not supported. If there is TPL, then it is the first phase. If there is SPL but no TPL, the the first phase is SPL. If there is no SPL, then this is U-Boot proper. Depending on the build flags we can determine whether the current build is for the first phase of U-Boot or not. There are four lines of uBoot commands: setenv bootargs consolettySTM0,115200 earlyprintk consoleblank0 ignoreloglevel fatload mmc 0 0xc0000000 zImage fatload mmc 0 0xc0500000 rootfs. U-Boot has up to three phases: TPL, SPL and U-Boot proper. Rootfs: Based on default config for stm32f469. On i.MX6 booting from eMMC works exactly like booting from an SD card: The Boot-ROM searches for executable code at 1K bytes into the data partition. Linux kernel: Change DRAM address to 0x0c000000 and size to 0x01000000. Specificaly when I comment the following code in ctr0.S: ifdef CONFIGSPLBUILD / Use a DRAM stack for the rest of SPL, if requested / bl splrelocatestackgd cmp r0, 0 movne. ![]() Here is how U-Boot and SPL would be installed on this storage device:ĭd if=SPL of=/dev/sdX bs=1k seek=1 conv=syncĭd if=u-boot.img of=/dev/sdX bs=1k seek=69 conv=sync The problem is that u-boot spl hangs between boardinitf () and boardinitr (), it seems that the bad thing happens while relocating the stack from SRAM to DRAM. Note that this will also work for a microSD by using mmc0 instead. Now on a connected PC a new usb drive should have shown up.įrom this point onwards anything is possible! Partitioning, mounting, writing binaries in arbitrary locations, …. The second step is to launch usb mass storage mode from the U-Boot console and specify what storage device to use.įor presenting the eMMC (mmc1) as a usb storage device, execute +#define CONFIG_USB_FUNCTION_MASS_STORAGE # CONFIG_CMD_BOOTEFI_HELLO_COMPILE is not setĬONFIG_NET_RANDOM_ETHADDR_OUI="d0:63:b4:00:00:00"ĭiff -git a/include/configs/m圆cuboxi.h b/include/configs/m圆cuboxi.h U-Boot has to be built from source with the ums command enabled:ĭiff -git a/configs/m圆cuboxi_defconfig b/configs/m圆cuboxi_defconfig The same U-Boot source can also generate an alternate FSBL named SPL. This is probably the easiest option for most people. The STM32 MPU boot chain uses Trusted Firmware-A (TF-A) as FSBL and U-Boot as SSBL. Loading Device Tree to 03ff6000, end 03fffd6f. Retrieving file: /extlinux/./socfpga_cyclone5_socdk.dtb Model: Altera SOCFPGA Cyclone V SoC Development Kit *** Warning - bad CRC, using default environment Google has many special features to help you find exactly what youre looking. SPL-specific notes: - stack is optionally in SDRAM, if CONFIGSPLSTACKR is defined and CONFIGSPLSTACKRADDR points into SDRAM - preloaderconsoleinit() can be called here - typically this is done by defining CONFIGSPLBOARDINIT and then. Search the worlds information, including webpages, images, videos and more. Currently those are missbuilt and not packaged. Non-SPL-specific notes: - U-Boot is relocated to the top of memory and is now running from there. U-Boot 2019.04-00246-g0c3e6f623d-dirty (22:19:44 -0500)įPGA: Altera Cyclone V, SE/A5 or SX/C5 or ST/D5, version 0x0 To build bootable uboot-sifive package, it must be built with opensbi. My bootlogs show no indication that the FPGA is being programmed by the preloader before the kernel is decompressed and started. I am trying to verify that my FPGA is programmed during the boot cycle. This function uses QorIQ Trust Architecture header. SPL image, so to continue chain of trust SPL image verifies U-boot image using. For secure boot process on these platforms ROM verifies. I am trying to boot a Linux kernel that can talk to the hardware in the FPGA portion. The SPL image is responsible for loading the next stage boot loader, which is. ![]()
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