1 /*
2 * (C) Copyright 2002
3 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
4 * Marius Groeger <mgroeger@sysgo.de>
5 *
6 * (C) Copyright 2002
7 * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
8 *
9 * SPDX-License-Identifier: GPL-2.0+
10 */
11
12 /*
13 * CPU specific code
14 */
15
16 #include <common.h>
17 #include <command.h>
18 #include <asm/system.h>
19 #include <asm/io.h>
20
21 static void cache_flush(void);
22
cleanup_before_linux(void)23 int cleanup_before_linux (void)
24 {
25 /*
26 * this function is called just before we call linux
27 * it prepares the processor for linux
28 *
29 * we turn off caches etc ...
30 */
31
32 disable_interrupts ();
33
34 /* ARM926E-S needs the protection unit enabled for the icache to have
35 * been enabled - left for possible later use
36 * should turn off the protection unit as well....
37 */
38 /* turn off I/D-cache */
39 icache_disable();
40 dcache_disable();
41 /* flush I/D-cache */
42 cache_flush();
43
44 return 0;
45 }
46
47 /* flush I/D-cache */
cache_flush(void)48 static void cache_flush (void)
49 {
50 unsigned long i = 0;
51
52 asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
53 asm ("mcr p15, 0, %0, c7, c6, 0": :"r" (i));
54 }
55
56 #ifndef CONFIG_ARCH_INTEGRATOR
57
reset_cpu(ulong addr)58 __attribute__((noreturn)) void reset_cpu(ulong addr __attribute__((unused)))
59 {
60 writew(0x0, 0xfffece10);
61 writew(0x8, 0xfffece10);
62 for (;;)
63 ;
64 }
65
66 #endif /* #ifdef CONFIG_ARCH_INTEGRATOR */
67