X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Farm%2Fmm%2Fcache-v4.S;h=b2908063ed6aa5be10ebdfd7ee00b37ef5e8021f;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=bbc822f16a7fdfd5cbe401108ee48c835b3df0d5;hpb=5273a3df6485dc2ad6aa7ddd441b9a21970f003b;p=linux-2.6.git

diff --git a/arch/arm/mm/cache-v4.S b/arch/arm/mm/cache-v4.S
index bbc822f16..b2908063e 100644
--- a/arch/arm/mm/cache-v4.S
+++ b/arch/arm/mm/cache-v4.S
@@ -29,9 +29,13 @@ ENTRY(v4_flush_user_cache_all)
  *	Clean and invalidate the entire cache.
  */
 ENTRY(v4_flush_kern_cache_all)
+#ifdef CPU_CP15
 	mov	r0, #0
 	mcr	p15, 0, r0, c7, c7, 0		@ flush ID cache
 	mov	pc, lr
+#else
+	/* FALLTHROUGH */
+#endif
 
 /*
  *	flush_user_cache_range(start, end, flags)
@@ -44,9 +48,13 @@ ENTRY(v4_flush_kern_cache_all)
  *	- flags	- vma_area_struct flags describing address space
  */
 ENTRY(v4_flush_user_cache_range)
+#ifdef CPU_CP15
 	mov	ip, #0
 	mcreq	p15, 0, ip, c7, c7, 0		@ flush ID cache
 	mov	pc, lr
+#else
+	/* FALLTHROUGH */
+#endif
 
 /*
  *	coherent_kern_range(start, end)
@@ -59,6 +67,19 @@ ENTRY(v4_flush_user_cache_range)
  *	- end	 - virtual end address
  */
 ENTRY(v4_coherent_kern_range)
+	/* FALLTHROUGH */
+
+/*
+ *	coherent_user_range(start, end)
+ *
+ *	Ensure coherency between the Icache and the Dcache in the
+ *	region described by start.  If you have non-snooping
+ *	Harvard caches, you need to implement this function.
+ *
+ *	- start  - virtual start address
+ *	- end	 - virtual end address
+ */
+ENTRY(v4_coherent_user_range)
 	mov	pc, lr
 
 /*
@@ -95,8 +116,10 @@ ENTRY(v4_dma_inv_range)
  *	- end	 - virtual end address
  */
 ENTRY(v4_dma_flush_range)
+#ifdef CPU_CP15
 	mov	r0, #0
 	mcr	p15, 0, r0, c7, c7, 0		@ flush ID cache
+#endif
 	/* FALLTHROUGH */
 
 /*
@@ -118,6 +141,7 @@ ENTRY(v4_cache_fns)
 	.long	v4_flush_user_cache_all
 	.long	v4_flush_user_cache_range
 	.long	v4_coherent_kern_range
+	.long	v4_coherent_user_range
 	.long	v4_flush_kern_dcache_page
 	.long	v4_dma_inv_range
 	.long	v4_dma_clean_range