[Bug 1001070] BSP for Olimex LPC-L2294-8M

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Sergei Gavrikov <sergei.gavrikov@gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |sergei.gavrikov@gmail.com

--- Comment #1 from Sergei Gavrikov <sergei.gavrikov@gmail.com> 2010-11-09 09:53:26 GMT ---
Hi Jean-Francois,

I plan to work on your patch as I have similar hardware. I have only one
comment on the patch. My concern is about using new CDL option:

CYGHWR_HAL_ARM_LPC2XXX_OLPCL2294_RAMSIZE

This CDL option (=name) is used 1) to fix the memory layout files, 2) to set
new bus timings both for RAM and NVRAM components, and 3) to select proper
FLASH parts for the hardware variant. As I said I would prefer to see in HAL
just one eCos CDL component which wraps one or more CDL options, something like
this (draft, not tested)

cdl_componet CYGHWR_HAL_ARM_LPC2XXX_OLPCL2294_VARIANT {
    display        "OLPCL2294 variant used"
    flavor         data
    default_value  { "OLPCL2294_1M" }
    legal_values   { "OLPCL2294_1M" "OLPCL2294_8M" }
    define -file system.h CYGHWR_BOARD
    description    "
        Blah, blah, blah."

    cdl_option CYGHWR_HAL_ARM_LPC2XXX_OLPCL2294_RAMSIZE {
        display       "External RAM size"
        flavor        data
        calculated    {
           is_substr(CYGHWR_HAL_ARM_LPC2XXX_OLPCL2294_VARIANT, "1M") ?
                 0x100000 : 0x800000
                      }
        description   "
            Blah, blah, blah."
    } 

    # More CDL options?
}

So, your code would use CYGHWR_BOARD_OLPCL2294_xM checks anywhere and CDL
option CYGHWR_HAL_ARM_LPC2XXX_OLPCL2294_RAMSIZE can be used in MLT only.

If you want you would add more CDL options in this component to implement your
TODOs (like overwriting  those config values for LPC BANKx registers in HAL
startup code, but, IMO, it is excessively).

Also, it will be nice to manage HAL_PLATFORM_EXTRA definition, to set its value
in either "1M" or "8M", that would show a proper hint in RedBoot (however, it
is beyond the scope your patch).

If you are familiar with CDL, can you, please, fix the patch (at least to wrap
RAMSIZE option in CDL component)? Otherwise, I would help to make some changes.


Sergei

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