49 lines
1.0 KiB
C
49 lines
1.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2018 Stefan Roese <sr@denx.de>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <init.h>
|
|
#include <malloc.h>
|
|
#include <linux/bitops.h>
|
|
#include <linux/io.h>
|
|
#include <linux/sizes.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
int dram_init(void)
|
|
{
|
|
#ifdef CONFIG_SKIP_LOWLEVEL_INIT
|
|
gd->ram_size = get_ram_size((void *)CONFIG_SYS_SDRAM_BASE, SZ_256M);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
int last_stage_init(void)
|
|
{
|
|
void *src, *dst;
|
|
|
|
src = malloc(SZ_64K);
|
|
dst = malloc(SZ_64K);
|
|
if (!src || !dst) {
|
|
printf("Can't allocate buffer for cache cleanup copy!\n");
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* It has been noticed, that sometimes the d-cache is not in a
|
|
* "clean-state" when U-Boot is running on MT7688. This was
|
|
* detected when using the ethernet driver (which uses d-cache)
|
|
* and a TFTP command does not complete. Copying an area of 64KiB
|
|
* in DDR at a very late bootup time in U-Boot, directly before
|
|
* calling into the prompt, seems to fix this issue.
|
|
*/
|
|
memcpy(dst, src, SZ_64K);
|
|
free(src);
|
|
free(dst);
|
|
|
|
return 0;
|
|
}
|