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

[Sandy Zhang]

Hi David,

I'm inline.

2017-08-14 9:17 GMT+08:00 David Hendricks <david.hendricks at gmail.com>:

> Hi Sandy,
>
> Responses in-line.
>
> On Fri, Aug 11, 2017 at 1:38 AM, Sandy Zhang <sanzhang at celestica.com>
> 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: sanzhang at celestica.com <viterzho at celestica.com>*
*Mobile: (+86)15965353952*
*Phone: (+86)021-61006028-7623*
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