[coreboot-gerrit] Change in coreboot[master]: console/flashsconsole: Adding a spi flash console for debugging
Julius Werner (Code Review)
gerrit at coreboot.org
Wed May 24 03:03:26 CEST 2017
Julius Werner has posted comments on this change. ( https://review.coreboot.org/19849 )
Change subject: console/flashsconsole: Adding a spi flash console for debugging
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Patch Set 2:
(9 comments)
https://review.coreboot.org/#/c/19849/2/src/console/Kconfig
File src/console/Kconfig:
PS2, Line 242: region
It's called "file" in CBFS (and I think "section" is more common for FMAP).
Line 258: region in the CBFS.
Why define two mechanisms? The FMAP seems like a more appropriate place to put this, and all boards use FMAPs these days, so why not just standardize on that? (You can still have a Kconfig for the size to be used in the default FMAP.)
Line 260: if CONSOLE_SPI_FLASH
Just use depends on instead of this block.
https://review.coreboot.org/#/c/19849/2/src/drivers/spi/flashconsole.c
File src/drivers/spi/flashconsole.c:
Line 41: if (cbfs_boot_locate(&file, "console", NULL) == 0) {
nit: probably looks better with
if (thing_that_can_have_errors()) {
printk(...error...);
return;
}
It might also help you not go over the 80 char limit, which you do a lot in this function (or is that my Gerrit being weird?).
Line 55: boot_device_init();
Already part of prepare_program_locate
Line 60: * the end of a previous log write.
You're banking on the fact that console output can never have legitimate 0xFFs. I think it would be safer to read back from the end of the buffer and find the first byte that's not 0xFF.
Line 121: for (i = 0; i < LINE_BUFFER_SIZE - 1; i++) {
Why not just store the current index in a global as well, rather than searching for it all the time?
Line 129: if (len >= LINE_BUFFER_SIZE - 1 ||
Why not tie this to tx_flush instead?
https://review.coreboot.org/#/c/19849/2/src/include/console/flash.h
File src/include/console/flash.h:
Line 25: #define __CONSOLE_FLASH_ENABLE__ IS_ENABLED(CONFIG_CONSOLE_SPI_FLASH)
Why are you redefining this? Makes it harder to see that it's governed by a Kconfig.
--
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Gerrit-MessageType: comment
Gerrit-Change-Id: I74a297b94f6881d8c27cbe5168f161d8331c3df3
Gerrit-PatchSet: 2
Gerrit-Project: coreboot
Gerrit-Branch: master
Gerrit-Owner: Youness Alaoui <snifikino at gmail.com>
Gerrit-Reviewer: Julius Werner <jwerner at chromium.org>
Gerrit-HasComments: Yes
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