Re: I2C/SPI/SMC relocation patch works for both SMC 1 and 2?

2 messages, 2 authors, 2004-09-28 · open the first message on its own page

Re: I2C/SPI/SMC relocation patch works for both SMC 1 and 2?

From: Wolfgang Denk <hidden>
Date: 2004-09-28 15:22:29

In message [off-list ref] you wrote:
   but the PDF file doesn't refer explicitly to SMC1, just to the 
generic SMC(UART).  does this mean that the same instructions to 
It relates to the SMC which parameter RAM  location  is  in  conflict
with the SPI/I2C parameter RAM, i. e. SMC1.
relocate SMC1 could also relocate SMC2 at the same time?  the writeup 
I think it makes little sense to speculate about this without knowing
anything about how the microcode patch actually works.
isn't clear on this and, from what i've read, it might be useful to 
relocate SMC2 if one wants to use the reserved memory just before it 
for, say, ethernet on SCC4 (if that's even possible).
No, this is impossible as there is no SCC4 on a MPC823/850.
   so, short question -- i know that patch supports relocating SMC1. 
does it also handle *both* SMC1 and SMC2?  or, perhaps, SMC2 all by 
itself?  there's nothing in the writeup i can see that clarified this.
It is not even mentioned, so assume it is NOT supported.

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
I think it's a new feature. Don't tell anyone it was an accident. :-)
  -- Larry Wall on s/foo/bar/eieio in [off-list ref]

Re: I2C/SPI/SMC relocation patch works for both SMC 1 and 2?

From: Robert P. J. Day <hidden>
Date: 2004-09-28 17:27:53

On Tue, 28 Sep 2004, Wolfgang Denk wrote:
In message [off-list ref] you wrote:
quoted
   but the PDF file doesn't refer explicitly to SMC1, just to the
generic SMC(UART).  does this mean that the same instructions to
It relates to the SMC which parameter RAM  location  is  in  conflict
with the SPI/I2C parameter RAM, i. e. SMC1.
huh?  what does SMC1 relocation have to do with either of I2C or SPI? i'm looking at the PRAM memory map right now, and whether or not you choose to relocate SMC1 seems independent from whether you choose to relocate both (or either) of I2C or SPI.

i don't see how SMC1 can be "in conflict with the SPI/I2C parameter RAM" as you claim.  can you explain that?

rday
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