On Tue, Mar 12, 2019 at 10:40 PM Marek Vasut marex@denx.de wrote:
On 3/12/19 3:33 PM, Westergreen, Dalon wrote:
On Tue, 2019-03-12 at 11:46 +0100, Marek Vasut wrote:
On 3/12/19 9:31 AM, Ley Foon Tan wrote:
Add board_get_usable_ram_top() function. Limit maximum usable ram top to 2GB.
Why ? There are ARM64 platforms which can access the entire DRAM range just fine, what's the problem ?
The issue is the gap in memory between 2GB and 4GB. There is some trickery you can use to gain access to the memory in that range, but in general, you dont have access. I believe just setting the banks up in the dts will resolve this.
E.g. the R8A779{5..9}* platforms also have gaps in memory and it all works fine . So unless there's some other specialty, there should be no problem.
Yes, we don't need this.
Regards Ley Foon