Category: Linux

Linux on the iPhone!

Reading this on the //linuxoniphone.blogspot.com just made my day.Steve Jobs must be thoroughly annoyed. First the unlocking and now this. Life we just be much easier if the iPhone was opened up.

LINUX ON THE IPHONE

FRIDAY, NOVEMBER 28, 2008

Linux on the iPhone!
I’m pleased to announce that the Linux 2.6 kernel has been ported to Apple’s iPhone platform, with support for the first and second generation iPhones as well as the first generation iPod touch. This is a rough first draft of the port, and many drivers are still missing, but it’s enough that a real alternative operating system is running on the iPhone.

What we have:

– Framebuffer driver
– Serial driver
– Serial over USB driver
– Interrupts, MMU, clock, etc.

What we have in openiboot (but hasn’t been ported yet):

– Read-only support for the NAND

What we don’t have (yet!):

– Write support for the NAND
– Wireless networking
– Touchscreen
– Sound
– Accelerometer
– Baseband support

The current userland we’re using, in the interest of expedience, is a Busybox installation created with buildroot, but glibc works fine as well, and we’re going to build a more permanent userland solution.

A demonstration video can be s [From Linux on the iPhone: Linux on the iPhone!]

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udrepper: Memory and Cache Paper

Excellent paper on memory and cache from a programmer’s point of view. It still surprises how little most programmers know about the hardware they are programming on. Thanks for the great paper Ulrich, it is bound to improve the quality of code out there.

Ulrich Drepper (udrepper) wrote, @ 2007-11-21 18:09:00 Entry tags: programming Memory and Cache Paper Well, it’s finally done. I’ve uploaded the PDF of the memory and cache paper to my home page. You can download it but do not re-publish it or make it available in any form to others. I do not want multiple copies flying around, at least not while I’m still intending to maintain the document. With Jonathan Corbet’s help the text should actually be readable. I had to change some of the text in the end to accommodate line breaks in the PDF. So I might have introduced problems, don’t think bad about Jonathan’s abilities. Aside, this is a large document. You simply go blind after a while, I know I do. Which brings me to the next point. Even though I intend to maintain the document, don’t expect me to do much in the near future. I’ve been working on it for far too long now and need a break. Integrating all the editing Jonathan produced plus today’s line breaking have given me the re [From udrepper: Memory and Cache Paper]

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