u-boot/arch/arm/cpu/arm926ejs/kirkwood/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

34 lines
1 KiB
C

/*
* Copyright (c) 2012 Michael Walle
* Michael Walle <michael@walle.cc>
*
* 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 <common.h>
#include <asm/arch/cpu.h>
#define FEROCEON_EXTRA_FEATURE_L2C_EN (1<<22)
void l2_cache_disable()
{
u32 ctrl;
ctrl = readfr_extra_feature_reg();
ctrl &= ~FEROCEON_EXTRA_FEATURE_L2C_EN;
writefr_extra_feature_reg(ctrl);
}