On 28/02/14 22:44, David Given wrote: [...] > However they've also released a big chunk of source code which seems to > include VC4 assembly: > > http://www.broadcom.com/docs/support/videocore/Brcm_Android_ICS_Graphics_Stack.tar.gz This *does* contain headers for all the weird registers. I now know what the mysterious hardware module at 0x7ee06000 is called, for example. Unfortunately while it names the registers it doesn't seem to go into any bit-level detail --- although *other* modules do. There's a README that says that all the headers are autogenerated from <location>. <location> is not in the source release. The source is a bit of a mess --- I've found the same register documented in three different headers, for example. I think it's been fairly hurriedly constructed out of an Android source tree. The good stuff seems to be in bcrm_usrlib/dag/vmcsx/vcinclude. The bad news is that there's no well-documented license anywhere, which is why this message is rather skimpy on technical details. Some files have a boilerplate 'Copyright Broadcom All Rights Reserved' header at the top. There's a tonne of open source stuff, mostly 3-clause BSD (also copyright Broadcom). Some say they're confidential. Some files have nothing at all. All I can say here is... *shrug* Oh, yeah, and I recognise the RTOS. And it also looks like while the source to the RTOS is there, it's missing the critical startup code which initialises the RAM. [sad face] Now I need to go to bed. I keep finding fascinating stuff in here. -- ┌─── ｄｇ＠ｃｏｗｌａｒｋ．ｃｏｍ ───── http://www.cowlark.com ───── │ "There does not now, nor will there ever, exist a programming │ language in which it is the least bit hard to write bad programs." --- │ Flon's Axiom
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