Cregit: Linux 6.2: dma.c

Contributors: 4
Author	Tokens	Token Proportion	Commits	Commit Proportion
Ralf Baechle	60	77.92%	2	28.57%
Jim Quinlan	7	9.09%	2	28.57%
Kevin Cernekee	6	7.79%	1	14.29%
Christoph Hellwig	4	5.19%	2	28.57%
Total	77		7

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

#include <linux/types.h>
#include <linux/dma-map-ops.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);
}