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| author | Ronald G. Minnich <rminnich@gmail.com> | 2009-05-16 23:05:20 +0000 |
|---|---|---|
| committer | Ronald G. Minnich <rminnich@gmail.com> | 2009-05-16 23:05:20 +0000 |
| commit | 56ae8fcb6fe545557c6b5a3ffb72f54bd3b53ddc (patch) | |
| tree | 9f7211f81edcc80576a73058c340ad2338ee9aa5 /payloads | |
| parent | d12acea520840b64804ec7f2d1b9fba423ed194e (diff) | |
This patch implements a "flash friendly" value for initialized areas of flash.
It makes the write part of flashrom dramatically faster with small
payloads like filo; and it also eliminates unnecessary wear on flash
by not writing zeros (it's unlikely this really matters; let me know
next time you flash a BIOS flash 100,000 times!).
More importantly, it allows for future partial flash upgrades with cbfs.
Note that uninitialized_flash_value is a global that can, if we ever need it,
be set by an argument in main. Assuming we ever see a flash where the
"erased" value is 0, not 0xff.
At the same time, "erased" value has been "1" on every EEPROM or
FLASH I've used for some time now.
Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>
Acked-by: Peter Stuge <peter@stuge.se>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4290 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'payloads')
0 files changed, 0 insertions, 0 deletions