Instead of adding missing definitions to the existing at91sam9_ddrsdr.h
and adapting the incoming DDRAM initialization code from at91bootstrap,
just replace the lightly used existing header with:
https://github.com/linux4sam/at91bootstrap/blob/v3.8.12/include/arch/at91_ddrsdrc.h

For easier comprehension, the replacement is done in three steps:
This last step copies the memory size querying functions from at91sam9_ddrsdr.h
to at91_ddrsdrc.h, then deletes it and fixes all references.

Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Most callers of arm_setup_stack substract a fixed offset of 8, 12 or 16
bytes from the stack top. This is unnecessary as on ARM we have a stack
that decrements before storing values. Substracting this offset probably
goes back to the U-Boot version we forked from. Stop this now.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

at91sama5_get_ddram_size() is despite the name specific to the
sama5d3 which it was added alongside of. sama5d4 board code continues
to use it, but accessing SAMA5D3_BASE_MPDDRC (0xffffea00) on
a sama5d4 should result in a Data Abort (Datasheet Figure 5-1)..

Fix this by giving at91sama5_get_ddram_size the mpddrc base
address as argument and migrate users to use one of two helpers
that specify the base address.

Tested-by: Sam Ravnborg <sam@ravnborg.org>
[afa: Sam didn't test this exact change, but tested the use
 of the critical part: accessing a different register]
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

The code that configure the stack uses sama5d3 constants.
Fix this to use the proper sama5d4 constants.

Boot tested on sama5d4_xplained.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

barebox_arm_reset_vector() is a global function but we never provided a
prototype anywhere. The prototypes differ for the different boards, so
to provide a common prototype we must harmonize them.

void barebox_arm_reset_vector(uint32_t r0, uint32_t r1, uint32_t r2)

Should be suitable for all boards.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Include deletion of now unused CONFIG symbols

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>