From: Scott Wood <scottwood@freescale.com>
To: hellohello <hellohello008@163.com>
Cc: linuxppc-dev@lists.ozlabs.org
Subject: Re: Problem of PowerPc 82xx when using smc
Date: Fri, 21 May 2010 12:28:18 -0500 [thread overview]
Message-ID: <4BF6C2B2.6030705@freescale.com> (raw)
In-Reply-To: <051501caf896$5c954630$a51cbcc0@sfdomain.com>
On 05/20/2010 10:33 PM, hellohello wrote:
>> No, it shouldn't -- rx_bd_base is of type "cbd_t *", so the multiplication
>> already happens as part of pointer arithmetic.
> ---Yes, you are right. I made a basic mistake.
>
> But now I have another question.
> The SMC1 params can be relocated to any offset of the DPRAM on a 64 byte boundary, not as the SCC1, which must be at 0x8000 offset of the DPRAM.
> The SMC1 params base is set at 0x87FC offset of the DPRAM.
>
> So if I want SMC1 params start at 0x200 in DPRAM , I should set 0x200 to the 0x87FC offset of the DPRAM.
> I have see this code in u-boot, but I can not find this code in neither cpm_uart_cpm2.c nor cpm_uart_core.c.
>
> Should I add these code to cpm_uart_core.c?
Newer kernels support dynamically allocating this parameter RAM. Older
kernels use whatever u-boot chose.
Why do you want to set it to a particular address?
-Scott
next prev parent reply other threads:[~2010-05-21 17:28 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-20 8:58 Problem of PowerPc 82xx when using smc hellohello
2010-05-20 17:06 ` Scott Wood
2010-05-21 3:33 ` hellohello
2010-05-21 11:20 ` Gary Thomas
2010-05-22 3:37 ` hellohello
2010-05-21 17:28 ` Scott Wood [this message]
2010-05-22 2:51 ` hellohello
-- strict thread matches above, loose matches on Subject: below --
2010-05-22 6:23 hellohello
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