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/cache.h>
20 #include <asm/system.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 
36 	/* turn off I/D-cache */
37 	icache_disable();
38 	dcache_disable();
39 	l2_cache_disable();
40 
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 #if !(CONFIG_IS_ENABLED(SYS_ICACHE_OFF) && CONFIG_IS_ENABLED(SYS_DCACHE_OFF))
51 	unsigned long i = 0;
52 
53 	asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i));
54 #endif
55 }
56