u-boot/arch/mips/mach-mtmips/cpu.c
Simon Glass cd93d625fd common: Drop linux/bitops.h from common header
Move this uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-05-18 21:19:23 -04:00

48 lines
1 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;
}