**** BEGIN LOGGING AT Sat Mar 02 02:59:59 2013 Mar 02 15:30:21 I notice SoC can't detect their memory size in hardward Mar 02 15:30:58 I have to tell bootloader how many memory tbe system have Mar 02 15:33:00 is that true . If it is true, why it can't Mar 02 15:41:58 ayaka: true Mar 02 15:42:51 ayaka: SDRAM interface is not providing any standard means to read the memory size because you can stack many sdram ICs and connect all to the same bus. Mar 02 15:43:15 but why PC can? Mar 02 15:43:25 ayaka: on PC every memory stick has a small SPI EEPROM that's connected by additional pins to the chipset. Mar 02 15:43:35 ayaka: look closely on a memory stick, you'll locate it Mar 02 15:44:22 I see, thank you Mar 02 15:44:56 ayaka: http://en.wikipedia.org/wiki/Serial_presence_detect Mar 02 15:45:28 Hm, so it's i2c, not spi. Mar 02 15:45:30 But i was close :) Mar 02 15:49:56 thank you Mar 02 15:51:33 in s3c6410, if I only int 128MB(it has 256MB), then uboot can't work. but for ar9331(mips) it doesn't have this problem Mar 02 15:53:46 ayaka: uboot should work with any amount of memory Mar 02 15:53:47 then what may cause problem in s3c6410 Mar 02 15:53:53 ayaka: your uboot config Mar 02 15:54:24 yes ram128 and 256 have different configs Mar 02 15:57:01 but I don't think it will cause problem, I read the code, the only difference is memory size setting Mar 02 16:07:52 ayaka: do you understand rows and columns of sdram memory and bit-level details of sdram controller initialisation? Mar 02 16:08:29 no Mar 02 16:08:42 I know nothing of it Mar 02 16:13:32 ayaka: the RAM size is not the only thing that you need to know to configure the SDRAM controller. Mar 02 16:14:28 yes, in u-boot configs, there is frequent of sdram and the base address of sdram Mar 02 16:28:32 so I also need to know columns and rows of sdram and bit-level details. But what is it? Mar 02 16:31:10 ayaka: open the datasheet and look at the SDRAM controller section. Then read the datasheet for your memory IC. Mar 02 16:32:24 is the SDRAM conttoller in SoC? how about PC? Mar 02 16:33:23 ayaka: what about PC? Mar 02 16:33:57 is the RAM controller in cpu? Mar 02 16:38:41 ayaka: SoC have them embedded. For PC sometimes it's integrated with the CPU, sometimes it's part of the north bridge. Mar 02 16:39:02 I see, thank you Mar 02 16:43:03 PaulFertser, on modern hardware (PC for instance) there is training nowadays Mar 02 16:43:11 basically SPD is not enough anymore Mar 02 16:44:03 GNUtoo-m4a785t-m: interesting, but why? Mar 02 16:44:21 GNUtoo-m4a785t-m: to fine-tune the drive strength and termination? Mar 02 16:44:29 That depends on MB layout? Mar 02 16:45:06 PaulFertser, to gain more speed.... Mar 02 16:45:33 GNUtoo-m4a785t-m: :) Mar 02 16:45:39 I think there is a presentation from ron minnich abuot that Mar 02 16:46:03 GNUtoo-m4a785t-m: thank you, that's interesting indeed Mar 02 16:46:18 let me find the slides Mar 02 16:46:28 will you dive into coreboot after that? Mar 02 16:46:55 GNUtoo-m4a785t-m: no, i have no usecase for it, but of course i would use it if i had a chance. Mar 02 16:47:04 ok Mar 02 16:47:07 Hm, probably my new PC at work... Mar 02 16:47:24 But it must be considerably hard to add support for a new MB... Mar 02 16:47:57 https://docs.google.com/presentation/d/1-_cgb4gRhZxl9anxudIgO_NAB80yq-ks4HtOx-zlDz8/edit Mar 02 16:48:05 I can extract the pdf if you want Mar 02 16:49:05 in file menu it can be exported as a pdf Mar 02 16:50:00 GNUtoo-m4a785t-m: oh, please do if it's easy for you. Mar 02 16:50:37 sorry, what is the subject you say just. what is MB layout Mar 02 16:51:40 http://gnutoo.homelinux.org/downloads/people/PaulFertser/CISL2012.pdf Mar 02 16:51:49 mainboard layout Mar 02 16:52:05 basically the design of its PCB Mar 02 16:52:48 I see, thank you Mar 02 16:54:49 GNUtoo-m4a785t-m: awesome, thanks for sharing! Mar 02 16:55:00 np Mar 02 16:55:14 hint: I also participate in the coreboot project Mar 02 16:56:15 GNUtoo-m4a785t-m: I know Mar 02 16:56:19 ok Mar 02 16:56:41 GNUtoo-m4a785t-m: luckily my ac100 netbook doesn't need any bios at all :) Mar 02 16:56:55 ok Mar 02 16:57:17 my x60 has coreboot, my alix 1.c too, and I did the port on the m4a785t-m Mar 02 16:58:46 PaulFertser: but you can still boot the EDK2 and have m$-like UEFI ^_^ Mar 02 16:59:45 Alex[sp3dev]: lol Mar 02 16:59:49 Alex[sp3dev]: no, thanks :) Mar 02 17:01:05 Alex[sp3dev], hi Mar 02 17:01:10 * Alex[sp3dev] is trying to get libhybris running (compiled from the ubuntu phablet ppa) Mar 02 17:01:16 GNUtoo-m4a785t-m: hi. what are you up to? Mar 02 17:01:29 freeing the i915 option rom currently.... Mar 02 17:01:48 GNUtoo-m4a785t-m: nice Mar 02 17:02:14 basically here's my todo: Mar 02 17:02:35 1) free the i915 option rom for the x60 and maybe the T60(if I can find one with an intel card) Mar 02 17:02:43 2)port Replicant to the GTA04 Mar 02 17:03:01 3) continue a bit the port of nuttx on the c155 Mar 02 17:04:22 GNUtoo-m4a785t-m: I'm still porting genode (written TWL6030 support, planning to do more). Sometimes I'm trying to get linux running on my nook hd+ (omap4470, full hd). Do you know of any modern modems where a free stack like osmocomm can work? Mar 02 17:04:56 not out of the box Mar 02 17:05:04 I know moders probably-unsigned modemsl Mar 02 17:05:06 *modems Mar 02 17:05:48 like the one in the sgs2, there was a project with harald playing with the baseband code but not wanting to port osmocombb to it Mar 02 17:06:21 apart that you know the rest Mar 02 17:06:32 like osmocombb for instance Mar 02 17:06:50 or the qualcomm reversing projects **** BEGIN LOGGING AT Sun Mar 03 00:04:28 2013 **** ENDING LOGGING AT Sun Mar 03 02:59:58 2013