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SPI read speed directly impacts boot time and we do quite a lot of
reading.
Add a way to easily find out the speed of SPI flash reads within
coreboot.
Write speed is less important since there are very few writes and they
are small.
BUG=chrome-os-partner:56556
BRANCH=none
TEST=run on gru with SPI_SPEED_DEBUG set to 1. See the output messages:
read SPI 627d4 7d73: 18455 us, 1740 KB/s, 13.920 Mbps
Change-Id: Id3814bd2b7bd045cdfcc67eb1fabc861bf9ed3b2
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 82cb93f6be47efce3b0a3843bab89d2381baef89
Original-Change-Id: Iec66f5b8e3ad62f14d836a538dc7801e4ca669e7
Original-Signed-off-by: Simon Glass <sjg@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/376944
Original-Commit-Ready: Julius Werner <jwerner@chromium.org>
Original-Tested-by: Simon Glass <sjg@google.com>
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/16701
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
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Provide the RW boot device operations for the common cbfs
SPI wrapper. The RW region_device is the same as the read-only
one. As noted in the boot_device_rw() introduction patch the
mmap() support should not be used in conjuction with writing
as that results in incoherent operations. That's fine as the
current mmap() support is only used in the cbfs layer which
does not support writing, i.e. no cbfs regions would be
written to with any previous or outstanding mmap() calls.
BUG=chrome-os-partner:56151
Change-Id: I7cc7309a68ad23b30208ac961b1999a79626b307
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/16199
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>
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The common boot device spi implementation is very much
specific to SPI flash. As such it should be moved into
that subdirectory. It's still a high-level option but
it correctly depends on BOOT_DEVICE_SPI_FLASH. Additionally
that allows the auto-selection of SPI_FLASH by a platform
selecting COMMON_CBFS_SPI_WRAPPER which allows for culling
of SPI_FLASH selections everywhere.
BUG=chrome-os-partner:56151
Change-Id: Ia2ccfdc9e1a4348cd91b381f9712d8853b7d2a79
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/16212
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Martin Roth <martinroth@google.com>
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