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From: Oskar Senft <osk@google.com>
Date: Mon, 9 Sep 2019 10:01:05 -0400
Message-ID: <CABoTLcRrd2sgxa6qN9bQQxyfX4E4fWpX=xmxFVeiksU8sk9tbw@mail.gmail.com>
Subject: Re: phosphor-ipmi-flash: Update over eSPI interface
To: Harry Sung1 <hsung1@lenovo.com>
Cc: Patrick Venture <venture@google.com>, Andrew MS1 Peng <pengms1@lenovo.com>,
 "openbmc@lists.ozlabs.org" <openbmc@lists.ozlabs.org>
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Hi Harry

What's the behavior on eSPI? I assume you still have the aspeed-lpc-ctrl
enabled, right?

Thanks
Oskar.

On Mon, Sep 9, 2019 at 4:41 AM Harry Sung1 <hsung1@lenovo.com> wrote:

> Hi Patrick,
>
>
>
> I found =E2=80=9Cphosphor-ipmi-flash=E2=80=9D have not support flash over=
 eSPI yet.
>
> May I ask if you have any plans to support flash over eSPI?
>
>
>
> I have done a simple test about shared memory between host and BMC :
>
> The shared memory is work after I set ESPI084 (source address) and ESPI08=
8
> (target address) registers.
>
> But it has an limitation that only 256 bytes are available on each page
> (4KB).
>
>
> For example, if host address starts to write from 0xFE0B0000 (BMC reserve=
d
> enough memory already)
>
> Writable area are:
>
> 0xFE0B0000 ~ 0xFE0B00FF
>
> 0xFE0B1000 ~ 0xFE0B10FF
>
> 0xFE0B2000 ~ 0xFE0B20FF
>
> 0xFE0B3000 ~ 0xFE0B30FF
>
> =E2=80=A6
>
> =E2=80=A6
>
> =E2=80=A6
>
>
>
>
>
> Thanks,
> Harry
>

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<div dir=3D"ltr">Hi Harry<div><br></div><div>What&#39;s the behavior on eSP=
I? I assume you still have the aspeed-lpc-ctrl enabled, right?</div><div><b=
r></div><div>Thanks</div><div>Oskar.</div></div><br><div class=3D"gmail_quo=
te"><div dir=3D"ltr" class=3D"gmail_attr">On Mon, Sep 9, 2019 at 4:41 AM Ha=
rry Sung1 &lt;<a href=3D"mailto:hsung1@lenovo.com" target=3D"_blank">hsung1=
@lenovo.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=
=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding=
-left:1ex">





<div lang=3D"ZH-TW">
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Hi Patrick,<u></u><u></u></span=
></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">I found =E2=80=9Cphosphor-ipmi-=
flash=E2=80=9D have not support flash over eSPI yet.<u></u><u></u></span></=
p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">May I ask if you have any plans=
 to support flash over eSPI?<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">I have done a simple test about=
 shared memory between host and BMC :<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">The shared memory is work after=
 I set ESPI084 (source address) and ESPI088 (target address) registers.<u><=
/u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">But it has an limitation that o=
nly 256 bytes are available on each page (4KB).<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><br>
For example, if host address starts to write from 0xFE0B0000 (BMC reserved =
enough memory already)<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Writable area are:<u></u><u></u=
></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">0xFE0B000=
0 ~ 0xFE0B00FF
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">0xFE0B100=
0 ~ 0xFE0B10FF<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">0xFE0B200=
0 ~ 0xFE0B20FF<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:black">0xFE0B300=
0 ~ 0xFE0B30FF<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">=E2=80=A6<u></u><u></u></span><=
/p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">=E2=80=A6<u></u><u></u></span><=
/p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">=E2=80=A6<u></u><u></u></span><=
/p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Thanks,<br>
Harry<u></u><u></u></span></p>
</div>
</div>

</blockquote></div>

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