| 1 | // SPDX-License-Identifier: GPL-2.0+ |
|---|---|
| 2 | |
| 3 | #include <linux/types.h> |
| 4 | #include <linux/dma-map-ops.h> |
| 5 | #include <asm/bmips.h> |
| 6 | #include <asm/io.h> |
| 7 | |
| 8 | bool bmips_rac_flush_disable; |
| 9 | |
| 10 | void arch_sync_dma_for_cpu_all(void) |
| 11 | { |
| 12 | void __iomem *cbr = BMIPS_GET_CBR(); |
| 13 | u32 cfg; |
| 14 | |
| 15 | if (boot_cpu_type() != CPU_BMIPS3300 && |
| 16 | boot_cpu_type() != CPU_BMIPS4350 && |
| 17 | boot_cpu_type() != CPU_BMIPS4380) |
| 18 | return; |
| 19 | |
| 20 | if (unlikely(bmips_rac_flush_disable)) |
| 21 | return; |
| 22 | |
| 23 | /* Flush stale data out of the readahead cache */ |
| 24 | cfg = __raw_readl(addr: cbr + BMIPS_RAC_CONFIG); |
| 25 | __raw_writel(val: cfg | 0x100, addr: cbr + BMIPS_RAC_CONFIG); |
| 26 | __raw_readl(addr: cbr + BMIPS_RAC_CONFIG); |
| 27 | } |
| 28 |