[coreboot] How to find out "page size" of a flash chip?
FENG Yu Ning
fengyuning1984 at gmail.com
Tue Nov 18 08:02:59 CET 2008
I have dug into more documentation, and found partial answer.
I am only considering SST flash chips. From the SST Product Selection
Guide, among various flash memories(Series 27,37,28,29,25), only
SST29xE featured with page-by-page write operations, with a page size
of 128 bytes.
1. How do we decide the page-sizes of other SST(and other vendors)
flash chips, which have no page mechanism?
2. Since we operate the flash chips (in case of ich) with
ich_spi_read/write, which in turn call ich_spi_read/write_page, what
happens to those chips without a page-read/write operation? I am going
to investigate the source code and data sheets further, but it is
appreciated if anyone familiar with this tell me directly (and it
would guide me through the investigation).
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