2 * (C) Copyright 2008 Texas Insturments
5 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
6 * Marius Groeger <mgroeger@sysgo.de>
9 * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
11 * See file CREDITS for list of people who contributed to this
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License as
16 * published by the Free Software Foundation; either version 2 of
17 * the License, or (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
37 #include <asm/system.h>
38 #include <asm/cache.h>
39 #include <asm/armv7.h>
40 #include <linux/compiler.h>
42 void __weak cpu_cache_initialization(void){}
44 int cleanup_before_linux(void)
47 * this function is called just before we call linux
48 * it prepares the processor for linux
50 * we turn off caches etc ...
52 #ifndef CONFIG_SPL_BUILD
56 /* switch off LCD panel */
58 /* disable LCD controller */
61 #endif /* CONFIG_LCD */
62 #endif /* CONFIG_SPL_BUILD */
65 * Turn off I-cache and invalidate it
68 invalidate_icache_all();
72 * dcache_disable() in turn flushes the d-cache and disables MMU
75 v7_outer_cache_disable();
78 * After D-cache is flushed and before it is disabled there may
79 * be some new valid entries brought into the cache. We are sure
80 * that these lines are not dirty and will not affect our execution.
81 * (because unwinding the call-stack and setting a bit in CP15 SCTRL
82 * is all we did during this. We have not pushed anything on to the
83 * stack. Neither have we affected any static data)
84 * So just invalidate the entire d-cache again to avoid coherency
87 invalidate_dcache_all();
90 * Some CPU need more cache attention before starting the kernel.
92 cpu_cache_initialization();