[U-Boot] RFC: U-Boot OneNAND IPL TEXT_BASE

[Marek Vasut <marek.vasut@gmail.com>]

Hey,

I've been tinkering with OneNAND IPL in uboot. I found out it wan't to load 
itself to the address specified in board/$(BOARDDIR)/config.mk . That's fine in 
most cases, but in my case that wasn't possible.

In my case, SDRAM init didn't fit into the IPL, so I had to copy U-Boot into 
SRAM, then execute it and let it relocate itself into SDRAM. One more time:
IPL: OneNAND->SRAM
U-Boot: SRAM->SDRAM

It all works fine, but when compiling the IPL, I had to alter TEXT_BASE not to 
point into SDRAM but SRAM too (because of stack). I introduced a variable called 
IPL which allows using config.mk from (for example) onenand-
ipl/board/$(BOARDDIR)/config.mk rather than the board/$(BOARDDIR)/config.mk one, 
which is in my opinion a correct behaviour.

Any opinions?

Thanks in advance.

diff --git a/config.mk b/config.mk
index 73b5195..8639580 100644
--- a/config.mk
+++ b/config.mk
@@ -130,9 +130,13 @@ BOARDDIR = $(VENDOR)/$(BOARD)
 else
 BOARDDIR = $(BOARD)
 endif
+ifdef  IPL
+sinclude $(TOPDIR)/$(IPL)/board/$(BOARDDIR)/config.mk  # include IPL specific 
rules
+else
 ifdef  BOARD
 sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules
 endif
+endif
 
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