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Date: Wed, 27 Aug 2008 22:12:51 -0700
From: "bhanu jampala" <adams.ppc@gmail.com>
To: linuxppc-embedded@ozlabs.org
Subject: cpm_dpalloc questions
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Hi Guys,

I am working on MCC HDLC controller on MCC8260. I have two important questions:

1. What is the range of DPRAM from which the cpm_dpalloc allocates memory?
    How does the cpm_dpalloc work?
    I need this because, I need to reserve the DPRAM memory for MCC2
from (128 * 60) to (255 * 60)
    for channels ranging from 128 - 255.

2. PROFF_SMC1 pointer placed at 0 , 64 offsets. is this not an area of
MCC1 controller?
    how if I want to use the MCC channel on MCC1.

 In file include/asm-powerpc/cpm2.h.

 /* The SMCs are relocated to any of the first eight DPRAM pages.
  * We will fix these at the first locations of DPRAM, until we
  * get some microcode patches :-).
  * The parameter ram space for the SMCs is fifty-some bytes, and
  * they are required to start on a 64 byte boundary.
  */
 #define PROFF_SMC1      (0)
 #define PROFF_SMC2      (64)

Regards,
Adams