On Sunday, December 27, 2015 at 11:18:25 AM, Wills Wang wrote: > On 12/27/2015 06:09 PM, Marek Vasut wrote: > > 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 ? > > Same times board can boot up, but in a very unstable. i use the > following setting: > > #define CONFIG_SYS_INIT_RAM_ADDR 0xbd000000
Should be 0xbd007000 > #define CONFIG_SYS_INIT_RAM_SIZE (32 * SZ_1K) Should be 4 KiB large. > #define CONFIG_SYS_INIT_SP_OFFSET \ > (CONFIG_SYS_INIT_RAM_SIZE - GENERATED_GBL_DATA_SIZE) > #define CONFIG_SYS_INIT_SP_ADDR \ > (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET) Did you investigate why the board has problems ? Best regards, Marek Vasut _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
