upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support
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u-boot/board/imgtec/boston/dt.c

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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2016 Imagination Technologies
*/
#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);
}