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
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
/*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Marius Groeger <mgroeger@sysgo.de>
*
* (C) Copyright 2002
* Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
*
* SPDX-License-Identifier: GPL-2.0+
*/
/*
* CPU specific code
*/
#include <common.h>
#include <command.h>
#include <asm/system.h>
#include <asm/io.h>
static void cache_flush(void);
int cleanup_before_linux (void)
{
/*
* this function is called just before we call linux
* it prepares the processor for linux
*
* we turn off caches etc ...
*/
disable_interrupts ();
/* ARM926E-S needs the protection unit enabled for the icache to have
* been enabled - left for possible later use
* should turn off the protection unit as well....
*/
/* turn off I/D-cache */
icache_disable();
dcache_disable();
/* flush I/D-cache */
cache_flush();
return 0;
}
/* flush I/D-cache */
static void cache_flush (void)
{
unsigned long i = 0;
asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
asm ("mcr p15, 0, %0, c7, c6, 0": :"r" (i));
}
#ifndef CONFIG_INTEGRATOR
__attribute__((noreturn)) void reset_cpu(ulong addr __attribute__((unused)))
{
writew(0x0, 0xfffece10);
writew(0x8, 0xfffece10);
for (;;)
;
}
#endif /* #ifdef CONFIG_INTEGRATOR */
|
