rockchip: sdram: Fix initialization of DRAM banksnext

The commit 55a342176984 ("common: Add an option to relocate on ram top")
changed so that dram_init_banksize() is called before gd->ram_top has
been initialized. This change broke Rockchip DRAM banks configuration
due to gd->ram_top now being 0 when dram_init_banksize() is called.

This makes first DRAM bank size calculation overflow and end up with

  DRAM bank   = 0x0000000000000000
  -> start    = 0x0000000000200000
  -> size     = 0xffffffffffe00000

instead of the expected (for 2 GiB)

  DRAM bank   = 0x0000000000000000
  -> start    = 0x0000000000200000
  -> size     = 0x000000007fe00000

or (for 4 GiB)

  DRAM bank   = 0x0000000000000000
  -> start    = 0x0000000000200000
  -> size     = 0x00000000f7e00000

on e.g. RK3399 boards.

Change to not depend on gd->ram_top having to be pre-calculated before
dram_init_banksize() is called, also move the related method
board_get_usable_ram_top() closer to more easily get an overview of
their interdependence, to restore working DRAM bank initialization.

Fixes: 55a342176984 ("common: Add an option to relocate on ram top")
Signed-off-by: Jonas Karlman <[email protected]>
Reported-by: Ilias Apalodimas <[email protected]>
Acked-by: Ilias Apalodimas <[email protected]>
Tested-by: Ilias Apalodimas <[email protected]> # on Radxa ROCK

0 files changed, 0 insertions, 0 deletions