| // SPDX-License-Identifier: GPL-2.0-or-later |
| * Copyright (C) 2019 Stephan Gerhold <stephan@gerhold.net> |
| #define PL310_WAY_MASK 0xff |
| #if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF) |
| /* Enable D-cache. I-cache is already enabled in start.S */ |
| #ifdef CONFIG_SYS_L2_PL310 |
| void v7_outer_cache_disable(void) |
| struct pl310_regs *const pl310 = (struct pl310_regs *)CFG_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); |