On Sunday, December 27, 2015 at 09:07:36 AM, Wills Wang wrote: > On 12/27/2015 03:38 PM, Marek Vasut wrote: > > On Sunday, December 27, 2015 at 08:33:26 AM, Wills Wang wrote: > >> On 12/27/2015 02:37 AM, Marek Vasut wrote: > >>> On Saturday, December 26, 2015 at 07:29:51 PM, Wills Wang wrote: > >>>> WASP is ar9341. > >>> > >>> Please do not top post. > >>> > >>> Did you try if the memory is accessible on your platform ? AR9331 I > >>> have here has the SRAM at 0xbd007000 , just like that machine in [1] . > >> > >> I found there is a memory segment at 0xbd000000...0xbd007fff. it's > >> independent of DDR physical memory, can be read and wrote, but > >> hardware can't boot up if don't execute lowlevel_init.S when define > >> CONFIG_SYS_INIT_SP_ADDR=0xbd007000 to set C stack into SRAM. > > > > Stack grows down, so of course if you put stack at the beginning of SRAM, > > that cannot work ;-) Put it at the end , 0xbd008000. > > This memory segment was mapped circularly at 0xbd000000...0xbdffffff.
So is this area at 0xbd008000 usable for stack or not ? Best regards, Marek Vasut _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot