u-boot/arch/arm/cpu/arm926ejs/cache.c
Michael Walle 679530278d arm, arm-kirkwood: disable l2c before linux boot
The decompressor expects the L2 cache to be disabled. This fixes booting
some kernels, which have CONFIG_ARM_PATCH_PHYS_VIRT enabled.

Signed-off-by: Michael Walle <michael@walle.cc>
Acked-by: Prafulla Wadaskar <prafulla@marvell.com>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Cc: Prafulla Wadaskar <prafulla@marvell.com>
Cc: Wolfgang Denk <wd@denx.de>
2012-02-12 10:11:28 +01:00

79 lines
1.9 KiB
C

/*
* (C) Copyright 2011
* Ilya Yanok, EmCraft Systems
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc.
*/
#include <linux/types.h>
#include <common.h>
#ifndef CONFIG_SYS_DCACHE_OFF
static inline void dcache_noop(void)
{
if (dcache_status()) {
puts("WARNING: cache operations are not implemented!\n"
"WARNING: disabling D-Cache now, you can re-enable it"
"later with 'dcache on' command\n");
dcache_disable();
}
}
void invalidate_dcache_all(void)
{
dcache_noop();
}
void invalidate_dcache_range(unsigned long start, unsigned long stop)
{
dcache_noop();
}
void flush_dcache_range(unsigned long start, unsigned long stop)
{
dcache_noop();
}
#else /* #ifndef CONFIG_SYS_DCACHE_OFF */
void invalidate_dcache_all(void)
{
}
void flush_dcache_all(void)
{
}
void invalidate_dcache_range(unsigned long start, unsigned long stop)
{
}
void flush_dcache_range(unsigned long start, unsigned long stop)
{
}
void flush_cache(unsigned long start, unsigned long size)
{
}
#endif /* #ifndef CONFIG_SYS_DCACHE_OFF */
/*
* Stub implementations for l2 cache operations
*/
void __l2_cache_disable(void)
{
}
void l2_cache_disable(void)
__attribute__((weak, alias("__l2_cache_disable")));