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| author | Andreas Dannenberg <dannenberg@ti.com> | 2019-06-04 17:55:45 -0500 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2019-07-17 11:12:54 -0400 |
| commit | a5a5d997b41a1b63eed67e78fac1d015e3e070e2 (patch) | |
| tree | 1294b16a216d02aeeb470ff791a7015be86d2478 /common | |
| parent | 70942db4dd1c5f177ea750df301d5b80c1fc15dc (diff) | |
| download | u-boot-a5a5d997b41a1b63eed67e78fac1d015e3e070e2.zip u-boot-a5a5d997b41a1b63eed67e78fac1d015e3e070e2.tar.gz u-boot-a5a5d997b41a1b63eed67e78fac1d015e3e070e2.tar.bz2 | |
spl: Allow performing BSS init early before board_init_f()
On some platform we have sufficient memory available early on to allow
setting up and using a basic BSS prior to entering board_init_f(). Doing
so can for example be used to carry state over to board_init_r() without
having to resort to extending U-Boot's global data structure.
To support such scenarios add a Kconfig option called CONFIG_SPL_EARLY_BSS
to allow moving the initialization of BSS prior to entering board_init_f(),
if enabled. Note that using this option usually should go along with using
CONFIG_SPL_SEPARATE_BSS and configuring BSS to be located in memory
actually available prior to board_init_f().
Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
Diffstat (limited to 'common')
| -rw-r--r-- | common/spl/Kconfig | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/common/spl/Kconfig b/common/spl/Kconfig index 7122c06..5978fb2 100644 --- a/common/spl/Kconfig +++ b/common/spl/Kconfig @@ -248,6 +248,16 @@ config TPL_BANNER_PRINT info. Disabling this option could be useful to reduce SPL boot time (e.g. approx. 6 ms faster, when output on i.MX6 with 115200 baud). +config SPL_EARLY_BSS + depends on ARM && !ARM64 + bool "Allows initializing BSS early before entering board_init_f" + help + On some platform we have sufficient memory available early on to + allow setting up and using a basic BSS prior to entering + board_init_f. Activating this option will also de-activate the + clearing of BSS during the SPL relocation process, thus allowing + to carry state from board_init_f to board_init_r by way of BSS. + config SPL_DISPLAY_PRINT bool "Display a board-specific message in SPL" help |