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Re: [Qemu-arm] [PATCH 4/8] bcm2835_emmc: add bcm2835 MMC/SD controller

From: Andrew Baumann
Subject: Re: [Qemu-arm] [PATCH 4/8] bcm2835_emmc: add bcm2835 MMC/SD controller
Date: Wed, 9 Dec 2015 19:01:17 +0000

> From: Peter Crosthwaite [mailto:address@hidden
> Sent: Wednesday, 9 December 2015 10:55
> > Yes, that's the same change I made. Is it going to be applied?
> >
> It missed the boat for 2.5, but you could help by putting a tested-by
> or reviewed-by to the patch.


> > The complete diff needed to boot Windows appears below. The first hunk
> avoids re-triggering the insert interrupt on card reset,
> Is this a runtime reset or an initial reset that is causing you grief?
> You patch is also patching the controller reset so is it more a case
> of the interrupt trigger on controller reset that is causing you
> issues?

It's the software-issued controller reset... at board power on, the insert 
interrupt bit is set (and UEFI depends on seeing it set), but when the Windows 
driver starts, it issues a reset command which clears the interrupt status. It 
also has a bug which livelocks the system if an insert interrupt is seen after 
that reset (which never happens on hardware, obviously).


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