// SPDX-License-Identifier: GPL-2.0+

#include <linux/types.h>
#include <linux/dma-map-ops.h>
#include <asm/bmips.h>
#include <asm/io.h>

bool bmips_rac_flush_disable;

void arch_sync_dma_for_cpu_all(void)
{
        void __iomem *cbr = bmips_cbr_addr;
        u32 cfg;

        if (boot_cpu_type() != CPU_BMIPS3300 &&
            boot_cpu_type() != CPU_BMIPS4350 &&
            boot_cpu_type() != CPU_BMIPS4380)
                return;

        if (unlikely(bmips_rac_flush_disable))
                return;

        /* Flush stale data out of the readahead cache */
        cfg = __raw_readl(cbr + BMIPS_RAC_CONFIG);
        __raw_writel(cfg | 0x100, cbr + BMIPS_RAC_CONFIG);
        __raw_readl(cbr + BMIPS_RAC_CONFIG);
}