// SPDX-License-Identifier: GPL-2.0+ #include <linux/types.h> #include <asm/bmips.h> #include <asm/io.h> void arch_sync_dma_for_cpu_all(void) { void __iomem *cbr = BMIPS_GET_CBR(); u32 cfg; if (boot_cpu_type() != CPU_BMIPS3300 && boot_cpu_type() != CPU_BMIPS4350 && boot_cpu_type() != CPU_BMIPS4380) 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); }