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https://github.com/AsahiLinux/u-boot
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65cc0e2a65
The rest of the unmigrated CONFIG symbols in the CONFIG_SYS namespace do not easily transition to Kconfig. In many cases they likely should come from the device tree instead. Move these out of CONFIG namespace and in to CFG namespace. Signed-off-by: Tom Rini <trini@konsulko.com> Reviewed-by: Simon Glass <sjg@chromium.org>
38 lines
1 KiB
C
38 lines
1 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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