Previously we defined separate functions to map registers to protect
ranges for each supported SPI ROM. This change instead adds a protect range
table + flags for each supported SPI ROM and adds common functions for
translation between ranges + registers. This makes supporting new parts
easier. Since we will never use most supported protection ranges, we can
even simplfy the tables.
The implementation is now similar to flashrom.
BUG=chrome-os-partner:37688
TEST=Manual on Glower.
flashwp disable + spi_flash_rsr --> 0
flashinfo --> shows no protection
spi_flash_prot 0 0x10000 + spi_flash_rsr --> 0x24
flashinfo --> shows 64KB protected
spi_flash_prot 0 0x20000 + spi_flash_rsr --> 0x28
flashinfo --> shows all 96KB protected
spi_flash_prot 0 0x40000 + spi_flash_rsr --> 0x2c
spi_flash_prot 0 0x80000 + spi_flash_rsr --> 0x10
spi_flash_prot 0 0 + spi_flash_rsr --> 0x00
spi_flash_prot 0 0x1000 --> error
spi_flash_prot 0x10000 0x10000 --> error
BRANCH=None
Change-Id: Ie5908ce687b7ff207b09794c7b001a4fbd9e0f5a
Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/259310
Reviewed-by: Randall Spangler <rspangler@chromium.org>
746debdf20