1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2008 Texas Insturments
6 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
7 * Marius Groeger <mgroeger@sysgo.de>
10 * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
21 #include <asm/system.h>
22 #include <asm/cache.h>
23 #include <asm/armv7.h>
24 #include <linux/compiler.h>
26 void __weak cpu_cache_initialization(void){}
28 int cleanup_before_linux_select(int flags)
31 * this function is called just before we call linux
32 * it prepares the processor for linux
34 * we turn off caches etc ...
36 #ifndef CONFIG_SPL_BUILD
40 if (flags & CBL_DISABLE_CACHES) {
43 * dcache_disable() in turn flushes the d-cache and disables MMU
46 v7_outer_cache_disable();
49 * After D-cache is flushed and before it is disabled there may
50 * be some new valid entries brought into the cache. We are
51 * sure that these lines are not dirty and will not affect our
52 * execution. (because unwinding the call-stack and setting a
53 * bit in CP15 SCTRL is all we did during this. We have not
54 * pushed anything on to the stack. Neither have we affected
55 * any static data) So just invalidate the entire d-cache again
56 * to avoid coherency problems for kernel
58 invalidate_dcache_all();
61 invalidate_icache_all();
64 * Turn off I-cache and invalidate it
67 invalidate_icache_all();
70 invalidate_icache_all();
75 * Some CPU need more cache attention before starting the kernel.
77 cpu_cache_initialization();
82 int cleanup_before_linux(void)
84 return cleanup_before_linux_select(CBL_ALL);