blob: 459a9673ebe8054b419032f9948b6c8aec1cf3d6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2018 Stefan Roese <sr@denx.de>
*/
#include <common.h>
#include <malloc.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;
}
|
