u-boot/board/AndesTech/ax25-ae350
Rick Chen 48cbf62460 riscv: ax25-ae350: Pass dtb address to u-boot with a1 register
ax25-ae350 use CONFIG_OF_BOARD via a2 and CONFIG_SYS_SDRAM_BASE
to boot from ram which allow the board to override the fdt
address originally.

But after this patch
riscv: save hart ID and device tree passed by prior boot stage
It provide prior_stage_fdt_address which offer a temporary
memory address to keep the dtb address passing from loader(gdb)
to u-boot with a1.

So passing via a2 and CONFIG_SYS_SDRAM_BASE is redundant and
can be removed. And it also somehow may corrupted BBL if it
was be arranged in CONFIG_SYS_SDRAM_BASE.

In board_fdt_blob_setup()
When boting from ram:
prior_stage_fdt_address will be use to reserved dtb temporarily.

When booting from ROM:
dtb will be pre-burned in CONFIG_SYS_FDT_BASE, if it is flash base.
Or CONFIG_SYS_FDT_BASE maybe a memory map space (NOT RAM or ROM)
which is provided by HW.

Signed-off-by: Rick Chen <rick@andestech.com>
Cc: Greentime Hu <greentime@andestech.com>
2018-12-05 14:14:16 +08:00
..
ax25-ae350.c riscv: ax25-ae350: Pass dtb address to u-boot with a1 register 2018-12-05 14:14:16 +08:00
Kconfig board: nx25-ae250: Rename as ax25-ae350 2018-05-29 14:45:02 +08:00
MAINTAINERS Merge git://git.denx.de/u-boot-riscv 2018-11-26 15:52:39 -05:00
Makefile board: nx25-ae250: Rename as ax25-ae350 2018-05-29 14:45:02 +08:00