Merge branches 'gemini' and 'misc' into devel

1 files changed, 58 insertions, 13 deletions

diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index c4ed9f9..87ec141 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -572,6 +572,8 @@ config CPU_TLB_V6
 config CPU_TLB_V7
 	bool
 
+config VERIFY_PERMISSION_FAULT
+	bool
 endif
 
 config CPU_HAS_ASID
@@ -715,17 +717,6 @@ config TLS_REG_EMUL
 	  a few prototypes like that in existence) and therefore access to
 	  that required register must be emulated.
 
-config HAS_TLS_REG
-	bool
-	depends on !TLS_REG_EMUL
-	default y if SMP || CPU_32v7
-	help
-	  This selects support for the CP15 thread register.
-	  It is defined to be available on some ARMv6 processors (including
-	  all SMP capable ARMv6's) or later processors.  User space may
-	  assume directly accessing that register and always obtain the
-	  expected value only on ARMv7 and above.
-
 config NEEDS_SYSCALL_FOR_CMPXCHG
 	bool
 	help
@@ -733,9 +724,34 @@ config NEEDS_SYSCALL_FOR_CMPXCHG
 	  Forget about fast user space cmpxchg support.
 	  It is just not possible.
 
+config DMA_CACHE_RWFO
+	bool "Enable read/write for ownership DMA cache maintenance"
+	depends on CPU_V6 && SMP
+	default y
+	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, Read or Write For Ownership in the ARMv6
+	  DMA cache maintenance functions is performed. These LDR/STR
+	  instructions change the cache line state to shared or modified
+	  so that the cache operation has the desired effect.
+
+	  Note that the workaround is only valid on processors that do
+	  not perform speculative loads into the D-cache. For such
+	  processors, if cache maintenance operations are not broadcast
+	  in hardware, other workarounds are needed (e.g. cache
+	  maintenance broadcasting in software via FIQ).
+
 config OUTER_CACHE
 	bool
 
+config OUTER_CACHE_SYNC
+	bool
+	help
+	  The outer cache has a outer_cache_fns.sync function pointer
+	  that can be used to drain the write buffer of the outer cache.
+
 config CACHE_FEROCEON_L2
 	bool "Enable the Feroceon L2 cache controller"
 	depends on ARCH_KIRKWOOD || ARCH_MV78XX0
@@ -754,15 +770,17 @@ config CACHE_FEROCEON_L2_WRITETHROUGH
 config CACHE_L2X0
 	bool "Enable the L2x0 outer cache controller"
 	depends on REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || MACH_REALVIEW_PB1176 || \
-		   REALVIEW_EB_A9MP || ARCH_MX35 || ARCH_MX31 || MACH_REALVIEW_PBX || ARCH_NOMADIK || ARCH_OMAP4
+		   REALVIEW_EB_A9MP || ARCH_MX35 || ARCH_MX31 || MACH_REALVIEW_PBX || \
+		   ARCH_NOMADIK || ARCH_OMAP4 || ARCH_U8500 || ARCH_VEXPRESS_CA9X4
 	default y
 	select OUTER_CACHE
+	select OUTER_CACHE_SYNC
 	help
 	  This option enables the L2x0 PrimeCell.
 
 config CACHE_TAUROS2
 	bool "Enable the Tauros2 L2 cache controller"
-	depends on ARCH_DOVE
+	depends on (ARCH_DOVE || ARCH_MMP)
 	default y
 	select OUTER_CACHE
 	help
@@ -781,3 +799,30 @@ config ARM_L1_CACHE_SHIFT
 	int
 	default 6 if ARM_L1_CACHE_SHIFT_6
 	default 5
+
+config ARM_DMA_MEM_BUFFERABLE
+	bool "Use non-cacheable memory for DMA" if CPU_V6 && !CPU_V7
+	depends on !(MACH_REALVIEW_PB1176 || REALVIEW_EB_ARM11MP || \
+		     MACH_REALVIEW_PB11MP)
+	default y if CPU_V6 || CPU_V7
+	help
+	  Historically, the kernel has used strongly ordered mappings to
+	  provide DMA coherent memory.  With the advent of ARMv7, mapping
+	  memory with differing types results in unpredictable behaviour,
+	  so on these CPUs, this option is forced on.
+
+	  Multiple mappings with differing attributes is also unpredictable
+	  on ARMv6 CPUs, but since they do not have aggressive speculative
+	  prefetch, no harm appears to occur.
+
+	  However, drivers may be missing the necessary barriers for ARMv6,
+	  and therefore turning this on may result in unpredictable driver
+	  behaviour.  Therefore, we offer this as an option.
+
+	  You are recommended say 'Y' here and debug any affected drivers.
+
+config ARCH_HAS_BARRIERS
+	bool
+	help
+	  This option allows the use of custom mandatory barriers
+	  included via the mach/barriers.h file.