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authorRonald G. Minnich <rminnich@gmail.com>2009-05-16 23:05:20 +0000
committerRonald G. Minnich <rminnich@gmail.com>2009-05-16 23:05:20 +0000
commit56ae8fcb6fe545557c6b5a3ffb72f54bd3b53ddc (patch)
tree9f7211f81edcc80576a73058c340ad2338ee9aa5 /util/abuild
parentd12acea520840b64804ec7f2d1b9fba423ed194e (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
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