u-boot/arch/arm/mach-u8500/cache.c
Simon Glass 90526e9fba common: Drop net.h from common header
Move this header out of the common header. Network support is used in
quite a few places but it still does not warrant blanket inclusion.

Note that this net.h header itself has quite a lot in it. It could be
split into the driver-mode support, functions, structures, checksumming,
etc.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-05-18 17:33:31 -04:00

38 lines
1 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2019 Stephan Gerhold <stephan@gerhold.net>
*/
#include <common.h>
#include <cpu_func.h>
#include <asm/armv7.h>
#include <asm/cache.h>
#include <asm/pl310.h>
#define PL310_WAY_MASK 0xff
#if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF)
void enable_caches(void)
{
/* Enable D-cache. I-cache is already enabled in start.S */
dcache_enable();
}
#endif
#ifdef CONFIG_SYS_L2_PL310
void v7_outer_cache_disable(void)
{
struct pl310_regs *const pl310 = (struct pl310_regs *)CONFIG_SYS_PL310_BASE;
/*
* Linux expects the L2 cache to be turned off by the bootloader.
* Otherwise, it fails very early (shortly after decompressing the kernel).
*
* On U8500, the L2 cache can be only turned on/off from the secure world.
* Instead, prevent usage of the L2 cache by locking all ways.
* The kernel needs to unlock them to make the L2 cache work again.
*/
writel(PL310_WAY_MASK, &pl310->pl310_lockdown_dbase);
writel(PL310_WAY_MASK, &pl310->pl310_lockdown_ibase);
}
#endif