Hello Alex,
I am not actively working for INTEL anymore (as my Linkedin profile suggests). For couple more months, my written agreement with them will come to the end, since we have some agreement in place for quite a while. I'll update my profile with the end date accordingly, when time comes. Here and everywhere else on the net, I speak only out of my IT experience/myself, so this has nothing to do with INTEL. In other words, opinions I write here are strictly mine, based on open net, open source, white paper documents and public data from INTEL, AMD and other companies.
There are other INTEL people watching this thread, so they might expedite your IPS/Sales Force case #. Good luck with that.
ATOM released wise, I was not too much involved with BSW (much more with BYT), so I have no idea if this what support suggested is correct, but it is (at least) worth trying.
Please, do note the following: http://www.anandtech.com/show/9806/intel-introduces-new-braswell-stepping-wi...
Namely (excerpt from the article): *The Braswell update is a new stepping which adjusts the power consumption of the cores, raising the frequency, raising the TDP of the Pentium variants for a larger product separation, and renaming both the processor itself and the HD Graphics implementation. This change is referred to in the documentation as moving from the C-stepping to the D-stepping, which typically co-incides with a change in the way these processors are made (adjusted metal layer arrangement or lithography mask update).*
Not sure how many D steppings are out there, you should ask/verify with support.
I myself now inspected ./src/include/console/post_codes.h, and there is no 0x52 post code per say. This is why I asked several times PED FSP team to update/document non existent FSP post codes, so you all Coreboot-ers can have more clear picture what is going on with FSP boot, stages wise. :-)
Considering the latest you wrote, there are two files you also need to inspect: src/cpu/intel/microcode/microcode.c src/include/cpu/intel/microcode.h
Sincerely hope (some of) this helps, Zoran
On Tue, Jul 26, 2016 at 8:04 AM, Alexander Böcken < Alexander.Boecken@junger-audio.com> wrote:
Hi Zoran,
thanks for checking back. I’m still on the issue (next to some other things), but haven’t made any progress yet. I also opened up a case at Intel Premier Support and tried to follow their suggestions (Case 00053422).
Anyway, I know the post_codes.h file. It defines POST_FSP_TEMP_RAM_INIT (0x90) which is the post code shown by coreboot just before it calls TempRamInit. Then TempRamInit shows 0x52. Intel suggested that this is a microcode problem (i.e. the microcode doesn’t match the CPU stepping or platform), however, I’m pretty sure that this is not the case. At least I’ve taken a look at the CPUID signature (which is 0x406C4) and the microcode header signature (which is 0x406C4). I also compared the platform ID bits from MSR 0x17 (which are 000, i.e. 1 << 000 = 1) with the platform ID field of the microcode (which is also 1). The microcode update facilities are documented in Intel’s System Programming Guide (#325384).
I’m currently checking if coreboot is able to update the microcode while still in bootblock. There is a call to intel_update_microcode_from_cbfs() in /src/soc/intel/braswell/bootblock/bootblock.c. Maybe, there is something sticking out…
Regards,
Alex
*Von:* Zoran Stojsavljevic [mailto:zoran.stojsavljevic@gmail.com] *Gesendet:* Montag, 25. Juli 2016 22:08 *An:* Alexander Böcken *Cc:* coreboot@coreboot.org; york.yang@intel.com *Betreff:* Re: [coreboot] Microcode problem with Braswell CPU
Hello Alex,
It is awhile... Opportunity just did struck (suddenly/plotzlich), so I am back!
While lurking around in Coreboot, trying to solve some "Mystery of digital Orga.ni.sms", I ran into very interesting file:
./src/include/console/post_codes.h
Coreboot tree I am using: [zoran@localhost coreboot-09.06.2016]$ git describe<CR>
4.4-455-g538b324
Maybe, it is worth looking into it. You tell us?
Zoran
On Tue, May 3, 2016 at 10:28 AM, Alexander Böcken < Alexander.Boecken@junger-audio.com> wrote:
Hello Zoran,
again, thanks for your clues to this problem. I don't think post code 0x52 is about memory configuration. The post code appears when I call TempRamInit which is supposed to enable Cache-as-RAM. Real memory is initialized at a later call to FspMemoryInit. coreboot supplies the location of the microcode and a cachable region to TempRamInit. Additionally, there are some settings that can be applied to the FSP image with Intel's Binary Configuration Tool. I don't know if these are used during TempRamInit, but I'll try and fiddle around with them.
I agree, it would be helpful to have a list of post codes that can be output by FSP. Otherwise it's all speculation as what is wrong.
Regards, Alex