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 <cpu_func.h>
18 #include <irq_func.h>
19 #include <asm/system.h>
20 #include <asm/io.h>
21
22 static void cache_flush(void);
23
cleanup_before_linux(void)24 int cleanup_before_linux (void)
25 {
26 /*
27 * this function is called just before we call linux
28 * it prepares the processor for linux
29 *
30 * we turn off caches etc ...
31 */
32
33 disable_interrupts();
34
35 /* ARM926E-S needs the protection unit enabled for the icache to have
36 * been enabled - left for possible later use
37 * should turn off the protection unit as well....
38 */
39 /* turn off I/D-cache */
40 icache_disable();
41 dcache_disable();
42 /* flush I/D-cache */
43 cache_flush();
44
45 return 0;
46 }
47
48 /* flush I/D-cache */
cache_flush(void)49 static void cache_flush (void)
50 {
51 unsigned long i = 0;
52
53 asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
54 asm ("mcr p15, 0, %0, c7, c6, 0": :"r" (i));
55 }
56
57 #ifndef CONFIG_ARCH_INTEGRATOR
58
reset_cpu(ulong addr)59 __attribute__((noreturn)) void reset_cpu(ulong addr __attribute__((unused)))
60 {
61 writew(0x0, 0xfffece10);
62 writew(0x8, 0xfffece10);
63 for (;;)
64 ;
65 }
66
67 #endif /* #ifdef CONFIG_ARCH_INTEGRATOR */
68