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boston: Setup memory ranges in FDT provided to Linux

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The boston memory map isn't suited to the simple "all memory starting
from 0" approach that the MIPS arch_fixup_fdt() implementation takes.
Instead we need to indicate the first 256MiB of DDR from 0 and the rest
from 0x90000000. Implement ft_board_setup to do that.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Paul Burton 2017-04-30 21:22:42 +02:00 committed by Daniel Schwierzeck
parent ed048e7c76
commit d2b12a5767
3 changed files with 29 additions and 0 deletions
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1
arch/mips/Kconfig
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@ -97,6 +97,7 @@ config TARGET_BOSTON
select MIPS_CM
select MIPS_L1_CACHE_SHIFT_6
select MIPS_L2_CACHE
select OF_BOARD_SETUP
select SUPPORTS_BIG_ENDIAN
select SUPPORTS_LITTLE_ENDIAN
select SUPPORTS_CPU_MIPS32_R1

1
board/imgtec/boston/Makefile
View file

@ -6,4 +6,5 @@
obj-y += checkboard.o
obj-y += ddr.o
obj-y += dt.o
obj-y += lowlevel_init.o

27
board/imgtec/boston/dt.c Normal file
View file

@ -0,0 +1,27 @@
/*
* Copyright (C) 2016 Imagination Technologies
*
* SPDX-License-Identifier: GPL-2.0
*/
#include <common.h>
#include <fdt_support.h>
int ft_board_setup(void *blob, bd_t *bd)
{
DECLARE_GLOBAL_DATA_PTR;
u64 mem_start[2], mem_size[2];
int mem_regions;
mem_start[0] = 0;
mem_size[0] = min_t(u64, 256llu << 20, gd->ram_size);
mem_regions = 1;
if (gd->ram_size > mem_size[0]) {
mem_start[1] = 0x80000000 + mem_size[0];
mem_size[1] = gd->ram_size - mem_size[0];
mem_regions++;
}
return fdt_fixup_memory_banks(blob, mem_start, mem_size, mem_regions);
}