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David Kuk" <david.kuk@xxxxxxxxxx> wrote: > Dear YH > I am sorry i have been disturbed by
other issues, the memory problem seems little bit difficult > to me. In our case, i
saw that in prom.c under mips/tango2, the function prom_init ,
it shows > that : > memcfg_t > *m=(memcfg_t*)KSEG1ADDR(MEM_BASE_dram_controller_0+FM_MEMCFG);
> it's seems the kernel has hard coded to
point the starting memory to DRAM controller 0's > starting address, if now, i have remap
64mb memory at DRAM controller 1 at remap register > 4, The problem is come, the kernel will
ignore any memory before dram controller 0's starting > address. Even i have add
0x0c000000--0x10000000 as boot memory, it still think it's first > usable pfn is
at 0x10000000. > my solution is 3 steps > 1, modify the compiler, let the linux
start address moved to 0x0c000000, > 2. modify the YAMON, and map the DRAM 1
controller to remap register4 in YAMON stage > 3, modify the linux, to set the two
piece of memory to the kernel as boot memory . > > it's this possible, or it have other
better solution ? > thx a lot for your kindly help ! > > > best wishes > David I'm running out of memory in linux on the smp86xx and attempting to implement this
solution. Did you ever get it to
work? No luck for me yet. I'm still a bit unclear why you must
switch linux to run off DRAM 1 instead of leaving it
on DRAM 0 and adding an additional call to add_memory_region
in prom_init for DRAM 1. But then again, I haven't gotten that to
work yet either :) Any info/patches are greatly appreciated. Thanks! -James |
