1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2002
4 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
5 * Marius Groeger <mgroeger@sysgo.de>
6 *
7 * (C) Copyright 2002
8 * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
9 */
10
11 /*
12 * CPU specific code
13 */
14
15 #include <common.h>
16 #include <command.h>
17 #include <asm/system.h>
18 #include <asm/io.h>
19
20 static void cache_flush(void);
21
cleanup_before_linux(void)22 int cleanup_before_linux (void)
23 {
24 /*
25 * this function is called just before we call linux
26 * it prepares the processor for linux
27 *
28 * we turn off caches etc ...
29 */
30
31 disable_interrupts ();
32
33 /* ARM926E-S needs the protection unit enabled for the icache to have
34 * been enabled - left for possible later use
35 * should turn off the protection unit as well....
36 */
37 /* turn off I/D-cache */
38 icache_disable();
39 dcache_disable();
40 /* flush I/D-cache */
41 cache_flush();
42
43 return 0;
44 }
45
46 /* flush I/D-cache */
cache_flush(void)47 static void cache_flush (void)
48 {
49 unsigned long i = 0;
50
51 asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
52 asm ("mcr p15, 0, %0, c7, c6, 0": :"r" (i));
53 }
54
55 #ifndef CONFIG_ARCH_INTEGRATOR
56
reset_cpu(ulong addr)57 __attribute__((noreturn)) void reset_cpu(ulong addr __attribute__((unused)))
58 {
59 writew(0x0, 0xfffece10);
60 writew(0x8, 0xfffece10);
61 for (;;)
62 ;
63 }
64
65 #endif /* #ifdef CONFIG_ARCH_INTEGRATOR */
66