Re: [flashrom] When flashrom support Intel Purley platform Lewisburg PCH?

[Sandy Zhang]

Hi David,

About set permissions for the "BIOS" master via BRWA and BRRA in the FRACC
register, do you mean modify the below location by FITC.exe? if yes, I have
changed the "Host CPU/BIOS Write Access" & "Host CPU/BIOS Read Access"'s value
to 0xFFFF to enable all the sixty region's access, but the result has not
any change.

[image: 内嵌图片 2]

2017-08-14 14:23 GMT+08:00 David Hendricks :
> On Sun, Aug 13, 2017 at 6:26 PM, Sandy Zhang 
> wrote:
> > Hi David,
> >
> > I'm inline.
>
> I don't see your responses. Did you intend to reply to my comments?
> > 2017-08-14 9:17 GMT+08:00 David Hendricks :
> > > Hi Sandy,
> > >
> > > Responses in-line.
> > >
> > > On Fri, Aug 11, 2017 at 1:38 AM, Sandy Zhang 
> > > wrote:
> > > > Hi David,
> > > >  Sorry, I have a doubt about the range outside, from the binary
> > > >
> > > > map, we can find the Spare 3 Region size is 0x00FFFFFF - 0xFF0000 + 1 =
> > > > 0x10000, and the binary size map to this range is also 0x10000, they are
> > > > equal, why outside was happened? and can you tell me how to update the
> > > > binary region's range defined in the flash description?
> > > >
> > > > Start (hex)    End (hex)    Length (hex)    Area Name
> > > >
> > > > ...
> > > > ...
> > > > ....
> > > > 00FF0000       00FFFFFF     00010000        Spare 3 Region
> > > > 01000000       01FFFFFF     01000000        BIOS Region
> > >
> > > The Flash Region registers (BIOS_FREGn) define the boundaries of each
> > > region. I don't see where 0xa36000-0xffffff is covered:
> > > 0x54: 0x00000000 FREG0: Flash Descriptor region (0x00000000-0x00000fff)
> > > is read-write.
> > > 0x58: 0x1fff1000 FREG1: BIOS region (0x01000000-0x01ffffff) is
> > > read-write.
> > > 0x5C: 0x0a250003 FREG2: Management Engine region (0x00003000-0x00a25fff)
> > > is read-write.
> > > 0x60: 0x00020001 FREG3: Gigabit Ethernet region (0x00001000-0x00002fff)
> > > is read-write.
> > > 0x64: 0x00007fff FREG4: Platform Data region is unused.
> > > 0x68: 0x0a350a26 FREG5: unknown region (0x00a26000-0x00a35fff) is
> > > read-write.
> > > 0x6C: 0x00007fff FREG6: unknown region is unused.
> > > 0x70: 0x00007fff FREG7: unknown region is unused.
> > > 0x74: 0x00007fff FREG8: unknown region is unused.
> > > 0x78: 0x00007fff FREG9: unknown region is unused.
> > >
> > > You might also need to set permissions for the "BIOS" master (i.e.
> > > flashrom running on the CPU) via BRWA and BRRA in the FRACC register.
> > >
> > > In addition, from flash log file(please see attachment
> > > > "Lewisburg_W25Q256.log"), it shows:
> > > > Found Programmer flash chip "Opaque flash chip" (32768 kB,
> > > > Programmer-specific) mapped at physical address 0x0000000000000000.
> > > >  but, my flash chip is "Winbond flash chip", what do you think about
> > > > this?
> > >
> > > This is OK. Intel hardware sequencing is an "opaque" programmer
> > > interface since flashrom does not directly send NOR flash commands via a
> > > raw SPI interface. For hardware sequencing we use the FCYCLE field as our
> > > command interface to the SPI flash.
> >
> > *Best Regard!*
> >
> > *Sandy Zhang (* 张立康*)*
> > *BIOS Engineer*
> > *Global Design Service*
> > *Celestica(Shanghai) R&D Center, China*
> > *Mail: [e-mail] *
> > *Mobile: [phone] <+86%20159%206535%203952>*
> > *Phone: [phone]-7623*