Date: Thu, 01 Jun 2006 15:46:42 +0300 From: m.boyarov@bsd.by (Max N. Boyarov) To: Olivier Houchard <mlfbsd@ci0.org> Cc: freebsd-arm@freebsd.org Subject: Re: i80321reg.h Message-ID: <7hwtc1vya5.fsf@bsd.by> In-Reply-To: <20060531213752.GA98637@ci0.org> (Olivier Houchard's message of "Wed, 31 May 2006 23:37:52 %2B0200") References: <7hodxe4132.fsf@bsd.by> <20060531170631.GA96970@ci0.org> <7hk6823yzj.fsf@bsd.by> <20060531175025.GA97299@ci0.org> <7hd5du3xdu.fsf@bsd.by> <20060531213752.GA98637@ci0.org>
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>>>>> "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 -- Best regards, Max N. Boyarov BSD.by Team. E-mail: m.boyarov@bsd.by Minsk, Republic of Belarus http://bsd.by
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