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![]() The Linux coding style guide (Documentation/process/coding-style.rst) clearly says: It's a **mistake** to use typedef for structures and pointers. Besides, using typedef for structures is annoying when you try to make headers self-contained. Let's say you have the following function declaration in a header: void foo(bd_t *bd); This is not self-contained since bd_t is not defined. To tell the compiler what 'bd_t' is, you need to include <asm/u-boot.h> #include <asm/u-boot.h> void foo(bd_t *bd); Then, the include direcective pulls in more bloat needlessly. If you use 'struct bd_info' instead, it is enough to put a forward declaration as follows: struct bd_info; void foo(struct bd_info *bd); Right, typedef'ing bd_t is a mistake. I used coccinelle to generate this commit. The semantic patch that makes this change is as follows: <smpl> @@ typedef bd_t; @@ -bd_t +struct bd_info </smpl> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> |
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Kconfig | ||
MAINTAINERS | ||
Makefile | ||
mx6sabreauto.c | ||
README |
How to use and build U-Boot on mx6sabreauto ------------------------------------------- mx6sabreauto_defconfig target supports mx6q/mx6dl/mx6qp sabreauto variants. In order to build it: $ make mx6sabreauto_defconfig $ make This will generate the SPL and u-boot-dtb.img binaries. - Flash the SPL binary into the SD card: $ sudo dd if=SPL of=/dev/sdX bs=1K seek=1 && sync - Flash the u-boot-dtb.img binary into the SD card: $ sudo dd if=u-boot-dtb.img of=/dev/sdX bs=1K seek=69 && sync Booting via Falcon mode ----------------------- Write in mx6sabreauto_defconfig the following define below: CONFIG_SPL_OS_BOOT=y In order to build it: $ make mx6sabreauto_defconfig $ make This will generate the SPL image called SPL and the u-boot-dtb.img. - Flash the SPL image into the SD card: $ sudo dd if=SPL of=/dev/sdb bs=1K seek=1 && sync - Flash the u-boot-dtb.img image into the SD card: $ sudo dd if=u-boot-dtb.img of=/dev/sdb bs=1K seek=69 && sync Create a FAT16 boot partition to store uImage and the dtb file, then copy the files there: $ sudo cp uImage /media/boot $ sudo cp imx6dl-sabreauto.dtb /media/boot Create a partition for root file system and extract it there: $ sudo tar xvf rootfs.tar.gz -C /media/root The SD card must have enough space for raw "args" and "kernel". To configure Falcon mode for the first time, on U-Boot do the following commands: - Load dtb file from boot partition: # load mmc 0:1 ${fdt_addr} imx6dl-sabreauto.dtb - Load kernel image from boot partition: # load mmc 0:1 ${loadaddr} uImage - Write kernel at 2MB offset: # mmc write ${loadaddr} 0x1000 0x4000 - Setup kernel bootargs: # setenv bootargs "console=ttymxc3,115200 root=/dev/mmcblk0p1 rootfstype=ext4 rootwait quiet rw" - Prepare args: # spl export fdt ${loadaddr} - ${fdt_addr} - Write args 1MB data (0x800 sectors) to 1MB offset (0x800 sectors) # mmc write 18000000 0x800 0x800 - Restart the board and then SPL binary will launch the kernel directly.