1 files changed, 0 insertions, 80 deletions
diff --git a/target/linux/cns3xxx/patches-4.19/010-arm_introduce-dma-fiq-irq-broadcast.patch b/target/linux/cns3xxx/patches-4.19/010-arm_introduce-dma-fiq-irq-broadcast.patch
deleted file mode 100644
index 45f8feead4..0000000000
--- a/target/linux/cns3xxx/patches-4.19/010-arm_introduce-dma-fiq-irq-broadcast.patch
+++ /dev/null
@@ -1,80 +0,0 @@
---- a/arch/arm/include/asm/glue-cache.h
-+++ b/arch/arm/include/asm/glue-cache.h
-@@ -156,9 +156,15 @@ static inline void nop_dma_unmap_area(co
- #define __cpuc_flush_user_range		__glue(_CACHE,_flush_user_cache_range)
- #define __cpuc_coherent_kern_range	__glue(_CACHE,_coherent_kern_range)
- #define __cpuc_coherent_user_range	__glue(_CACHE,_coherent_user_range)
--#define __cpuc_flush_dcache_area	__glue(_CACHE,_flush_kern_dcache_area)
- 
--#define dmac_flush_range		__glue(_CACHE,_dma_flush_range)
-+#ifndef CONFIG_DMA_CACHE_FIQ_BROADCAST
-+# define __cpuc_flush_dcache_area	__glue(_CACHE,_flush_kern_dcache_area)
-+# define dmac_flush_range		__glue(_CACHE,_dma_flush_range)
-+#else
-+# define __cpuc_flush_dcache_area	__glue(fiq,_flush_kern_dcache_area)
-+# define dmac_flush_range		__glue(fiq,_dma_flush_range)
-+#endif
-+
- #endif
- 
- #endif
---- a/arch/arm/mm/Kconfig
-+++ b/arch/arm/mm/Kconfig
-@@ -916,6 +916,17 @@ config DMA_CACHE_RWFO
- 	  in hardware, other workarounds are needed (e.g. cache
- 	  maintenance broadcasting in software via FIQ).
- 
-+config DMA_CACHE_FIQ_BROADCAST
-+	bool "Enable fiq broadcast DMA cache maintenance"
-+	depends on CPU_V6K && SMP
-+	select FIQ
-+	help
-+	  The Snoop Control Unit on ARM11MPCore does not detect the
-+	  cache maintenance operations and the dma_{map,unmap}_area()
-+	  functions may leave stale cache entries on other CPUs. By
-+	  enabling this option, fiq broadcast in the ARMv6
-+	  DMA cache maintenance functions is performed.
-+
- config OUTER_CACHE
- 	bool
- 
---- a/arch/arm/mm/flush.c
-+++ b/arch/arm/mm/flush.c
-@@ -319,6 +319,7 @@ void __sync_icache_dcache(pte_t pteval)
- void flush_dcache_page(struct page *page)
- {
- 	struct address_space *mapping;
-+	bool skip_broadcast = true;
- 
- 	/*
- 	 * The zero page is never written to, so never has any dirty
-@@ -335,7 +336,10 @@ void flush_dcache_page(struct page *page
- 
- 	mapping = page_mapping_file(page);
- 
--	if (!cache_ops_need_broadcast() &&
-+#ifndef CONFIG_DMA_CACHE_FIQ_BROADCAST
-+        skip_broadcast = !cache_ops_need_broadcast();
-+#endif
-+        if (skip_broadcast &&
- 	    mapping && !page_mapcount(page))
- 		clear_bit(PG_dcache_clean, &page->flags);
- 	else {
---- a/arch/arm/mm/dma.h
-+++ b/arch/arm/mm/dma.h
-@@ -5,8 +5,13 @@
- #include <asm/glue-cache.h>
- 
- #ifndef MULTI_CACHE
--#define dmac_map_area			__glue(_CACHE,_dma_map_area)
--#define dmac_unmap_area 		__glue(_CACHE,_dma_unmap_area)
-+#ifndef CONFIG_DMA_CACHE_FIQ_BROADCAST
-+# define dmac_map_area			__glue(_CACHE,_dma_map_area)
-+# define dmac_unmap_area 		__glue(_CACHE,_dma_unmap_area)
-+#else
-+# define dmac_map_area			__glue(fiq,_dma_map_area)
-+# define dmac_unmap_area			__glue(fiq,_dma_unmap_area)
-+#endif
- 
- /*
-  * These are private to the dma-mapping API.  Do not use directly.