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83d290c5 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
3d818266 WD |
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 | |
792a09eb | 8 | * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de> |
3d818266 WD |
9 | */ |
10 | ||
11 | /* | |
12 | * CPU specific code | |
13 | */ | |
14 | ||
d678a59d | 15 | #include <common.h> |
3d818266 | 16 | #include <command.h> |
9edefc27 | 17 | #include <cpu_func.h> |
36bf446b | 18 | #include <irq_func.h> |
677e62f4 | 19 | #include <asm/system.h> |
3d818266 | 20 | |
b3acb6cd | 21 | static void cache_flush(void); |
3d818266 | 22 | |
3d818266 WD |
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 | ||
9d3915b2 | 32 | disable_interrupts(); |
3d818266 WD |
33 | |
34 | /* turn off I/D-cache */ | |
b3acb6cd JCPV |
35 | icache_disable(); |
36 | dcache_disable(); | |
3d818266 | 37 | /* flush I/D-cache */ |
b3acb6cd | 38 | cache_flush(); |
74f4304e | 39 | |
b3acb6cd | 40 | return 0; |
3d818266 WD |
41 | } |
42 | ||
b3acb6cd JCPV |
43 | /* flush I/D-cache */ |
44 | static void cache_flush (void) | |
3d818266 | 45 | { |
b3acb6cd | 46 | unsigned long i = 0; |
3d818266 | 47 | |
b3acb6cd | 48 | asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i)); |
3d818266 | 49 | } |