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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commit c8ffd1356d42223cbb8c86280a083cc3c93e6426, reversing changes made to 2ee6f3a5f7550de3599faef9704e166e5dcace35. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
39 lines
1.0 KiB
C
39 lines
1.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2019 Stephan Gerhold <stephan@gerhold.net>
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*/
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#include <common.h>
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#include <cpu_func.h>
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#include <asm/armv7.h>
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#include <asm/cache.h>
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#include <asm/pl310.h>
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#define PL310_WAY_MASK 0xff
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#if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF)
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void enable_caches(void)
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{
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/* Enable D-cache. I-cache is already enabled in start.S */
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dcache_enable();
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}
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#endif
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#ifdef CONFIG_SYS_L2_PL310
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void v7_outer_cache_disable(void)
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{
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struct pl310_regs *const pl310 = (struct pl310_regs *)CFG_SYS_PL310_BASE;
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/*
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* Linux expects the L2 cache to be turned off by the bootloader.
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* Otherwise, it fails very early (shortly after decompressing the kernel).
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*
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* On U8500, the L2 cache can be only turned on/off from the secure world.
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* Instead, prevent usage of the L2 cache by locking all ways.
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* The kernel needs to unlock them to make the L2 cache work again.
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*/
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writel(PL310_WAY_MASK, &pl310->pl310_lockdown_dbase);
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writel(PL310_WAY_MASK, &pl310->pl310_lockdown_ibase);
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}
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#endif
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