On 08/24/2012 03:48 AM, Lukasz Majewski wrote:
Hi Stephen,
I'm writing to you, since I've posted a patch series regarding GPT support for Samsung Trats board (you were on the CC).
e.g. http://patchwork.ozlabs.org/patch/179785/
I think, that we can cooperate to provide better EFI/GPT support.
In mine implementation the "gpt" command (with several sub commands) has been proposed
- we can discuss if this is a correct way to go.
Moreover, at this patch series a "weak" GUID generator is implemented. For now it is "good enough", since I consider the restoration as an emergency situation. However,I wonder how can we provide better GUID (and in general random numbers pool) generator for u-boot.
Maybe md5sum command can be used with some running clock (WDT, or system clock from u-boot start up) data to provide better entropy?
Any ideas?
The question I'm asking is why we need partition creation support in u-boot in the first place? Next you need filesystem creation too?
Rob
Regards, Lukasz
This patch series provides a new command - "gpt" for eMMC partition table (in the GPT format) restoration and display.
As a pre-work, some cleanup at the part_efi.c file was performed to remove custom macros and make GPT related structures more readable.
The GPT detailed description has been written to README.gpt file.
Tested at:
- Exynos4210 rev.1 - TRATS Samsung development board
Lukasz Majewski (6): gpt:doc: GPT (GUID Partition Table) documentation gpt: Replace the leXX_to_int() calls with ones defined at <compiler.h> gpt: Replacement of GPT structures members with ones indicating endianness and size gpt: Support for GPT (GUID Partition Table) restoration gpt: Support for new "gpt" command gpt: Enable support for GPT partition table restoration at Samsung's Trats
common/Makefile | 1 + common/cmd_gpt.c | 182 ++++++++++++++++++++++++++ disk/part_efi.c | 334 +++++++++++++++++++++++++++++++++++++---------- disk/part_efi.h | 85 ++++++------ doc/README.gpt | 199 ++++++++++++++++++++++++++++ include/configs/trats.h | 23 +++- include/part.h | 2 + 7 files changed, 715 insertions(+), 111 deletions(-) create mode 100644 common/cmd_gpt.c create mode 100644 doc/README.gpt