28 lines
627 B
C
28 lines
627 B
C
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// SPDX-License-Identifier: GPL-2.0+
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#include <linux/types.h>
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#include <linux/dma-map-ops.h>
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#include <asm/bmips.h>
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#include <asm/io.h>
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bool bmips_rac_flush_disable;
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void arch_sync_dma_for_cpu_all(void)
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{
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void __iomem *cbr = BMIPS_GET_CBR();
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u32 cfg;
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if (boot_cpu_type() != CPU_BMIPS3300 &&
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boot_cpu_type() != CPU_BMIPS4350 &&
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boot_cpu_type() != CPU_BMIPS4380)
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return;
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if (unlikely(bmips_rac_flush_disable))
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return;
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/* Flush stale data out of the readahead cache */
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cfg = __raw_readl(cbr + BMIPS_RAC_CONFIG);
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__raw_writel(cfg | 0x100, cbr + BMIPS_RAC_CONFIG);
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__raw_readl(cbr + BMIPS_RAC_CONFIG);
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}
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