1234567891011121314151617181920212223242526272829303132333435363738 |
- // 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
|