On Mar 30, 2010, at 9:37 AM, Timur Tabi wrote:
> Kumar Gala wrote:
>> +void setup_ddr_bat(phys_addr_t dram_size)
>> +{
>> + unsigned long batu, bl;
>> +
>> + bl = TO_BATU_BL(min(dram_size, CONFIG_MAX_MEM_MAPPED));
>> +
>> + if (BATU_SIZE(bl) != dram_size) {
>> + u64 sz = (u64)dram_size - BATU_SIZE(bl);
>> + print_size(sz, " left unmapped\n");
>> + }
>
> We still have the problem that, on a 1.5GB system, U-Boot will think that
> there are 1.5GB of DDR, but the BAT will be set to 1GB. When U-Boot tries to
> relocate itself, it will machine check.
>
> We need a way to tell U-Boot that we only have 1GB of DDR, but still have it
> tell Linux that we have 1.5GB of DDR.
is this situation you have today? (or just a concern?)
- k
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