Re: [PULL 59/68] aspeed: Add an AST2600 eval board

["Cédric Le Goater" <clg@kaod.org>]

On 16/10/2019 14:20, Philippe Mathieu-Daudé wrote:
> Hi Peter,
> 
> On 10/15/19 7:03 PM, Peter Maydell wrote:
>> On Mon, 14 Oct 2019 at 17:05, Peter Maydell <peter.maydell@linaro.org> wrote:
>>>
>>> From: Cédric Le Goater <clg@kaod.org>
>>>
>>> Signed-off-by: Cédric Le Goater <clg@kaod.org>
>>> Reviewed-by: Joel Stanley <joel@jms.id.au>
>>> Message-id: 20190925143248.10000-21-clg@kaod.org
>>> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
>>> ---
>>>   include/hw/arm/aspeed.h |  1 +
>>>   hw/arm/aspeed.c         | 23 +++++++++++++++++++++++
>>>   2 files changed, 24 insertions(+)
>>
>>> @@ -455,6 +467,17 @@ static const AspeedBoardConfig aspeed_boards[] = {
>>>           .num_cs    = 2,
>>>           .i2c_init  = witherspoon_bmc_i2c_init,
>>>           .ram       = 512 * MiB,
>>> +    }, {
>>> +        .name      = MACHINE_TYPE_NAME("ast2600-evb"),
>>> +        .desc      = "Aspeed AST2600 EVB (Cortex A7)",
>>> +        .soc_name  = "ast2600-a0",
>>> +        .hw_strap1 = AST2600_EVB_HW_STRAP1,
>>> +        .hw_strap2 = AST2600_EVB_HW_STRAP2,
>>> +        .fmc_model = "w25q512jv",
>>> +        .spi_model = "mx66u51235f",
>>> +        .num_cs    = 1,
>>> +        .i2c_init  = ast2600_evb_i2c_init,
>>> +        .ram       = 2 * GiB,
>>
>> Hi. I just discovered that this makes 'make check' fail on
>> 32-bit systems, because you can't default to 2GB of RAM
>> for a board:
>>
>> (armhf)pmaydell@mustang-maydell:~/qemu$
>> ./build/all-a32/arm-softmmu/qemu-system-arm -M ast2600-evb
>> qemu-system-arm: at most 2047 MB RAM can be simulated
>>
>> It's also a pretty rudely large amount of RAM to allocate
>> by default: it caused 'make check' to fail on my OSX
>> box, which is 64-bits but doesn't have huge swathes
>> of free RAM.
> 
> It is unlikely you use this board on a 32-bit system...
> 
> You usually prefer to have modeled hardware matching real-life,
> what about making this board not available on 32-bit systems
> (we will soon have more boards like this):
> 
>   #if HOST_LONG_BITS > 32
>       {
>           .name      = MACHINE_TYPE_NAME("ast2600-evb"),
>           .desc      = "Aspeed AST2600 EVB (Cortex A7)",
>           ...
>       },
>   #endif /* HOST_LONG_BITS > 32 */

I sent a patch to lower the default RAM size to 1G but you can always 
increase it on the command line. 

Making the machine available seems a better choice but that's fine with
me if we prefer to restrict its use to 64bits hosts. As you wish.

C.