Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
28 lines
626 B
C
28 lines
626 B
C
// 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_cbr_addr;
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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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