GSoC2011(Week 5): the layout of coreboot rom and cbfstool for ARM

Hi all. How time flies. It has been 4 weeks since my last post. During this month, I have finished the design and implement of bootblock, Rom structure and cbfstool for ARM. Following I will show my changes to you all.
Continue reading GSoC2011(Week 5): the layout of coreboot rom and cbfstool for ARM

GSoC2011(Week 1): Analysis of U-boot ARM boot code

This is such a busy week. At the end of last week, I have just ordered my OpenRD-Ultimate box but sadly it will be delivered at the end of June. So if I just wait for that box, I will not be able to test my code. That’s terrible! After talking with my mentor, I decided first porting coreboot to RealView Versatile/PB926EJ-S board then to OpenRD-Ultimate. Since qemu can emulate PB926EJ-S, I can test my code on it quickly and freely. After this work, the basic layout, libs and headers for ARM are ready to use. So I can start to port coreboot to OpenRD-Ultimate then.
Continue reading GSoC2011(Week 1): Analysis of U-boot ARM boot code

GSoC2011 Project: Porting coreboot to ARM architecture

I am so excited that my idea on porting coreboot to ARM architecture has been accepted by GSoC project this year. First, let me introduce myself to you all. I am now a junior student at Hebei University of Technology, People’s Republic of China. My major is Computer Science and Technology. Although my courses are almost focus on high-level software development like database system and software engineering, I am a fan of low-level development. I taught myself IA32 and ARM architecture last year. And during this summer, we will porting coreboot to ARM and make it a new bootloader for ARM.

Those days, I am studying the building system of coreboot deeply, and I am trying to add cross-compile toolchain support to it. Developers has created such a great system and I want to make it greater. 🙂

Thanks for reading my project and any comment is welcome.

Coreboot console over Ethernet

Although this article is about Coreboot I start from beginning. Once upon a time (November 2009) there was nice idea to make SerialICE work through the Ethernet link. Reason is simple, it is slow and Ethernet is way faster. I started to investigate if there is some network adapter which can be used without the need of RAM.

If you check the documentation of most Ethernet chips, the packet descriptors are always located in main memory and they  just use DMA to transfer data to/from the FIFO inside the card. I tried some sophisticated google queries to find out if there is some adapter with internal SRAM, and after a while I found one. Continue reading Coreboot console over Ethernet