Am 20.06.2011 01:13 schrieb Michael Karcher:
> The currently unreferenced function in sharplhf00l04.c does a standard
> FWH block protection reset (writes 0 to the protection register) and a
> standard FWH block erase.
> The locking blocks of the FWH block lock cover 128KB areas, and thats
> the only thing page_size is used for in the functions referenced in the
> LHF00L04 entry.
My datasheet talks about 8 kB sectors and 64 kB blocks in "Figure 3.
Memory Map", but "Table 8. FWH Flash Registers Configuration Map" only
mentions registers for the 8 kB sectors in the top 64 kB block
explicitly. "Table 8" also mentions "XX002H Whole Block Lock Register"
as generic placeholder, and AFAICS those two X mean you have one block
lock register for each of the 15 bottom 64 kB blocks and one for each of
the 8 top 8 kB sectors. That also means the 82802ab unlocking as is
can't be used.
I was unable to find any 128 kB reference in my datasheet, so I'm going
to Nack that part.
> Finally, this adds a comment that there are non-volatile (flash memory)
> lock bits for 8 sectors in the last 64KB. They are write-only and clearable
> at once. Readback seems unsupported.
I have a slightly different interpretation of the datasheet (see above),
so I'm not sure how to proceed.
> Signed-off-by: Michael Karcher <flashrom(a)mkarcher.dialup.fu-berlin.de>
Killing sharplhf00l04.c is a good thing, though, so that part is
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006(a)gmx.net>
On 23.02.2010 05:45, Spangler, Mike T wrote:
> I can probe with a continuity tester, but would need to know specific
> pin locations to try. Do you have any generic info on doing this?
Yes (well, I'd have to write up something), but the solution mentioned
by Michael is way easier, so I'll wait until Michael has diagnosed the
GPIO settings from the flashrom run on factory BIOS.
"I do consider assignment statements and pointer variables to be among
computer science's most valuable treasures."
-- Donald E. Knuth