On Tue, Oct 02, 2018 at 05:22:33AM -0600, Simon Glass wrote:
At present there is no standard way in U-Boot to pass information from SPL to U-Boot proper. But sometimes SPL wants to convey information to U-Boot that U-Boot cannot easily figure out. For example, if SPL sets up SDRAM then it might want to pass the size of SDRAM, or the location of each bank, to U-Boot proper.
Add a new 'bloblist' feature which provides this. A bloblist is set up in the first phase of U-Boot that runs (i.e. TPL or SPL). The location of this info may be in SRAM or CAR (x86 cache-as-RAM) or somewhere else.
Information placed in this region is preserved (with a checksum) through TPL and SPL and ends up in U-Boot. At this point it is copied into SDRAM so it can be used after relocation.
Signed-off-by: Simon Glass sjg@chromium.org Acked-by: Andreas Dannenberg dannenberg@ti.com
In general:
Reviewed-by: Tom Rini trini@konsulko.com
But:
+config BLOBLIST_ADDR
- hex "Address of bloblist"
- depends on BLOBLIST
- default 0xe000
This default needs to be if WHATEVER, for whatever platform that's a valid address for using by default.