On Wed, Apr 13, 2016 at 09:38:35PM -0700, Jason Cobham wrote: > Hi Sascha, > > Thanks for the quick reply. > > > So you replaced barebox_arm_entry with imx53_barebox_entry, right? What > > memory size do you have and what size gets detected then? > > Yes, I used imx53_barebox_entry. I have two boards, 512MB/1G. In > further testing, I found the 512MB board was detected correctly, and > the 1G board was detected at 2G. > > ... > > > As a first step you should remove the /memory node in > > arch/arm/dts/imx53-ccxmx53.dtsi. Since there are different possible > > memory setups for this board it is wrong anyway. Then it would be > > interesting what imx_esdctl_v4_add_mem() detects. I believe it should be > > possible to fix it if it detects the wrong memory size. > > For the 1G board, I removed the memory node and looked into > imx_esdctl_v4_add_mem(). I found: > add_mem: cs0 base: 0x70000000 cs0 size: 0x40000000 > add_mem: cs1 base: 0xb0000000 cs1 size: 0x40000000 > > Going further into it, I found in the imx_v4_sdram_size() read the > following from the esdctl registers: > ctlval:0xc4110000, esdmisc:0xc00016d0 which is set from the > appropriate flash-header file. > > The ram populated on the 1G board is MT47H128M16 – 128 Meg x 16 (16 > Meg x 16 x 8 banks). > Comparing the register setting against the datasheet for the ram chips > looks like there was a mistake in the row setting of the 1G > flash-header. After updating it to what I believe is correct setting: > (ctlval:0xc3110000, esdmisc:0xc00016d0), the memory is now detected > correctly. So you say that the flash header sets up memory of twice the actual size which then misleads the detection code? Then this is worth fixing, also the /memory node should be removed. Care to send patches for this? Thanks Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
