i80321reg.h

[Olivier Houchard]

On Thu, Jun 01, 2006 at 03:46:42PM +0300, Max N. Boyarov wrote:
> 
> >>>>> "OH" == Olivier Houchard writes:
> 
>  OH>  On Wed, May 31, 2006 at 08:41:17PM +0300, Max N. Boyarov wrote:
>  >> 
>  >> >>>>> "OH" == Olivier Houchard writes:
>  >> 
>  >>  OH>  On Wed, May 31, 2006 at 08:06:40PM +0300, Max N. Boyarov wrote:
>  >>  >> 
>  >>  >> >>>>> "OH" == Olivier Houchard writes:
>  >>  >> 
>  >>  >>  OH>  On Wed, May 31, 2006 at 07:21:21PM +0300, Max N. Boyarov wrote:
>  >>  >>  >> 
>  >>  >>  >> Hi!
>  >>  >>  >> 
>  >>  >>  >> What document should I read in order to understand
>  >>  >>  >> how to calculate the defines that are used in i80321reg.h ?
>  >>  >>  >> 
>  >>  >> 
>  >>  >>  OH> Hi Max,
>  >>  >> Hi Olivier, 
>  >>  >>  OH> I'm not sure I understand the question. However, those most of those values
>  >>  >>  OH> come from the Intel 80321 I/O Processor developer's manual, available here :
>  >>  >>  OH> http://www.intel.com/design/iio/manuals/273517.htm
>  >>  >> 
>  >>  >> Sorry for my english :). I meant, I do not know how freebsd works with virtual
>  >>  >> memory, i.e. what address range is used for user applications, where kernel resides.
>  >>  >> What would you recommend to read about that? Just for education purposes :) My concern 
>  >>  >> is 80321 xcale port only (not generic).
>  >>  >> 
>  >> 
>  >>  OH> No worries, my english isn't better :)
>  >>  OH> Unfortunately I'm not sure there's something explaining this beside the code
>  >>  OH> itself, so I'm gonna try to answer.
>  >>  OH> Most of this is the same for every arm port, including the 80321.
>  >>  OH> The interesting #define are mostly in sys/arm/include/vmparam.h
>  >>  OH>  * The line between user space and kernel space
>  >>  OH>  * Mappings >= KERNEL_BASE are constant across all processes
>  >>  OH>  */
>  >>  OH> #define KERNBASE                0xc0000000
>  >> 
>  >>  OH> So generally speaking, whatever is >= 0xc0000000 is kernelland, whatever is <
>  >>  OH> is userland.
>  >>  OH> In arm/xscale/iq31244_machdep.c (which should be usable for every i80321
>  >>  OH> port, and thus has an unaccurate name), we map 0xfe800000 (IQ80321_OBIO_BASE),
>  >>  OH> physical == virtual, to be able to use the UART early, 
>  >>  OH> then we use the virtual address 0xfe400000 (IQ80321_IOW_VBASE) to map the ATU
>  >>  OH> stuff and the CPU registers.
>  >> 
>  >>  OH> I'm still not sure I properly answer to your question:) Feel free to ask
>  >>  OH>  for more.
>  >> 
>  >>  Many thanks, I shall continue to experiments with i80219 :)
>  >> 
> 
>  OH> I'm very interested in i80219 support but have no hardware, please make me
>  OH> know how it goes, I'd be more than happy to provide help.
> 
>  It's work :))))
> 
>  http://ncd0.bsd.by/arm/freebsd-arm-ep80219.log
> 
> 

Very nice work !
It seems you've been able to re-use a lot of the code from the 80321, which
is good. Care to share the patches ? :-)

Olivier