Hi Bin, On 19 November 2015 at 20:38, Bin Meng <bmeng...@gmail.com> wrote: > Hi Simon, > > On Fri, Nov 20, 2015 at 11:09 AM, Simon Glass <s...@chromium.org> wrote: >> Hi, >> >> I'm wondering what might come next for U-Boot x86 support. >> >> The PCI conversion to driver model is coming along nicely. The ACPI >> support is only partially there but it is a good start.
I have another series of PCI patches in the works and hope to get these out in a few weeks. The intent is to fully move x86 to use the driver model API. >> >> What else? More platforms? Other features? Better support for existing >> platforms? >> > > Two biggest feature gaps so far are complete ACPI support, and SMM > support. ACPI is pretty much a must-have if we want power management > feature in the OS. For SMM, I am not convinced that we have to do that > in U-Boot, for example those BIOS guys invented USB legacy support > (I/O port emulation of PS/2 keyboard) via SMM but today we have native > USB support and we should not do such with SMM in U-Boot. One corner > case is that some ACPI AML codes on some commercial BIOS trap the ACPI > calls into SMM where SMM is a must-have. Unfortunately such > limitations exist as there are still lots of unpublished chipset docs > from various vendors who want to protect their IP (so-called). > > ACPI support seems to be a must if we want to support booting Windows, > also we may need help from SeaBIOS (chain-loaded from U-Boot). Yes we should try to get that finished. It seems pretty close at least on qemu and minnowboard max. > > For other features, what I can think of now are: > - New platform support which relies on FSP. With FSP it is quite easy > to add a new platform support for Intel processors. > - FSP spec 1.1 support, however Intel has not released any FSP package > based on FSP spec 1.1. I believe their next gen Atom/Core processors' > FSP will support FSP 1.1 (like Braswell, Skylake) Yes it seems like this will happen when we get the first board that supports it. > - TPM support, and Intel TXT/TXE There is LPC TPM support at present so perhaps that is a start. > - xHCI support on Intel chipset (looks the U-Boot xHCI driver is not > working for Intel) Agreed, this shouldn't be too tricky as it is a standard. > - Audio support (maybe just providing audio codec's verb table in U-Boot) There is basic speaker support, and on a few ARM boards there is basic audio support (playing a waveform, and code to generate a waveform). This is pretty platform-specific as each codec is different. Do you have a board with a built-in audio codec? Regards, Simon _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
