mirror of https://github.com/OpenIPC/firmware.git
35 lines
1.0 KiB
Diff
35 lines
1.0 KiB
Diff
diff -drupN a/arch/arm/mm/cache-v6.S b/arch/arm/mm/cache-v6.S
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--- a/arch/arm/mm/cache-v6.S 2018-08-06 17:23:04.000000000 +0300
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+++ b/arch/arm/mm/cache-v6.S 2022-06-12 05:28:14.000000000 +0300
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@@ -270,6 +270,11 @@ v6_dma_clean_range:
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* - end - virtual end address of region
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*/
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ENTRY(v6_dma_flush_range)
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+#ifdef CONFIG_CACHE_FLUSH_RANGE_LIMIT
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+ sub r2, r1, r0
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+ cmp r2, #CONFIG_CACHE_FLUSH_RANGE_LIMIT
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+ bhi v6_dma_flush_dcache_all
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+#endif
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#ifdef CONFIG_DMA_CACHE_RWFO
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ldrb r2, [r0] @ read for ownership
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strb r2, [r0] @ write for ownership
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@@ -292,6 +297,18 @@ ENTRY(v6_dma_flush_range)
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mcr p15, 0, r0, c7, c10, 4 @ drain write buffer
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ret lr
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+#ifdef CONFIG_CACHE_FLUSH_RANGE_LIMIT
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+v6_dma_flush_dcache_all:
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+ mov r0, #0
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+#ifdef HARVARD_CACHE
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+ mcr p15, 0, r0, c7, c14, 0 @ D cache clean+invalidate
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+#else
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+ mcr p15, 0, r0, c7, c15, 0 @ Cache clean+invalidate
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+#endif
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+ mcr p15, 0, r0, c7, c10, 4 @ drain write buffer
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+ mov pc, lr
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+#endif
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+
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/*
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* dma_map_area(start, size, dir)
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* - start - kernel virtual start address
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