Merge tag 'arc-5.1-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc

Pull ARC updates from Vineet Gupta:

 - unaligned access support for HS cores

 - Removed extra memory barrier around spinlock code

 - HSDK platform updates: enable dmac, reset

 - some more boot logging updates

 - misc minor fixes

* tag 'arc-5.1-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
  arch: arc: Kconfig: pedantic formatting
  ARCv2: spinlock: remove the extra smp_mb before lock, after unlock
  ARC: unaligned: relax the check for gcc supporting -mno-unaligned-access
  ARC: boot log: cut down on verbosity
  ARCv2: boot log: refurbish HS core/release identification
  arc: hsdk_defconfig: Enable CONFIG_BLK_DEV_RAM
  ARC: u-boot args: check that magic number is correct
  ARC: perf: bpok condition only exists for ARCompact
  ARCv2: Add explcit unaligned access support (and ability to disable too)
  ARCv2: lib: introduce memcpy optimized for unaligned access
  ARC: [plat-hsdk]: Enable AXI DW DMAC support
  ARC: [plat-hsdk]: Add reset controller handle to manage USB reset
  ARC: DTB: [scripted] fix node name and address spelling

27 files changed, 399 insertions, 314 deletions

diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index df55672c59e6..c781e45d1d99 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -144,11 +144,11 @@ config ARC_CPU_770
 	  Support for ARC770 core introduced with Rel 4.10 (Summer 2011)
 	  This core has a bunch of cool new features:
 	  -MMU-v3: Variable Page Sz (4k, 8k, 16k), bigger J-TLB (128x4)
-                   Shared Address Spaces (for sharing TLB entries in MMU)
+	           Shared Address Spaces (for sharing TLB entries in MMU)
 	  -Caches: New Prog Model, Region Flush
 	  -Insns: endian swap, load-locked/store-conditional, time-stamp-ctr
 
-endif	#ISA_ARCOMPACT
+endif #ISA_ARCOMPACT
 
 config ARC_CPU_HS
 	bool "ARC-HS"
@@ -198,7 +198,7 @@ config ARC_SMP_HALT_ON_RESET
 	  at designated entry point. For other case, all jump to common
 	  entry point and spin wait for Master's signal.
 
-endif	#SMP
+endif #SMP
 
 config ARC_MCIP
 	bool "ARConnect Multicore IP (MCIP) Support "
@@ -249,7 +249,7 @@ config ARC_CACHE_VIPT_ALIASING
 	bool "Support VIPT Aliasing D$"
 	depends on ARC_HAS_DCACHE && ISA_ARCOMPACT
 
-endif	#ARC_CACHE
+endif #ARC_CACHE
 
 config ARC_HAS_ICCM
 	bool "Use ICCM"
@@ -370,7 +370,7 @@ config ARC_FPU_SAVE_RESTORE
 	  based on actual usage of FPU by a task. Thus our implemn does
 	  this for all tasks in system.
 
-endif	#ISA_ARCOMPACT
+endif #ISA_ARCOMPACT
 
 config ARC_CANT_LLSC
 	def_bool n
@@ -386,6 +386,15 @@ config ARC_HAS_SWAPE
 
 if ISA_ARCV2
 
+config ARC_USE_UNALIGNED_MEM_ACCESS
+	bool "Enable unaligned access in HW"
+	default y
+	select HAVE_EFFICIENT_UNALIGNED_ACCESS
+	help
+	  The ARC HS architecture supports unaligned memory access
+	  which is disabled by default. Enable unaligned access in
+	  hardware and use software to use it
+
 config ARC_HAS_LL64
 	bool "Insn: 64bit LDD/STD"
 	help
@@ -414,7 +423,7 @@ config ARC_IRQ_NO_AUTOSAVE
 	  This is programmable and can be optionally disabled in which case
 	  software INTERRUPT_PROLOGUE/EPILGUE do the needed work
 
-endif	# ISA_ARCV2
+endif # ISA_ARCV2
 
 endmenu   # "ARC CPU Configuration"
 
diff --git a/arch/arc/Makefile b/arch/arc/Makefile
index df00578c279d..e2b991f75bc5 100644
--- a/arch/arc/Makefile
+++ b/arch/arc/Makefile
@@ -28,6 +28,12 @@ cflags-$(CONFIG_ARC_HAS_SWAPE)		+= -mswape
 
 ifdef CONFIG_ISA_ARCV2
 
+ifdef CONFIG_ARC_USE_UNALIGNED_MEM_ACCESS
+cflags-y				+= -munaligned-access
+else
+cflags-y				+= -mno-unaligned-access
+endif
+
 ifndef CONFIG_ARC_HAS_LL64
 cflags-y				+= -mno-ll64
 endif
diff --git a/arch/arc/boot/dts/abilis_tb100.dtsi b/arch/arc/boot/dts/abilis_tb100.dtsi
index 02410b211433..c0bcd97522bb 100644
--- a/arch/arc/boot/dts/abilis_tb100.dtsi
+++ b/arch/arc/boot/dts/abilis_tb100.dtsi
@@ -38,7 +38,7 @@
 			clock-div = <6>;
 		};
 
-		iomux: iomux@FF10601c {
+		iomux: iomux@ff10601c {
 			/* Port 1 */
 			pctl_tsin_s0: pctl-tsin-s0 {   /* Serial TS-in 0 */
 				abilis,function = "mis0";
@@ -162,182 +162,182 @@
 			};
 		};
 
-		gpioa: gpio@FF140000 {
+		gpioa: gpio@ff140000 {
 			compatible = "abilis,tb10x-gpio";
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <27 2>;
-			reg = <0xFF140000 0x1000>;
+			reg = <0xff140000 0x1000>;
 			gpio-controller;
 			#gpio-cells = <2>;
 			abilis,ngpio = <3>;
 			gpio-ranges = <&iomux 0 0 0>;
 			gpio-ranges-group-names = "gpioa";
 		};
-		gpiob: gpio@FF141000 {
+		gpiob: gpio@ff141000 {
 			compatible = "abilis,tb10x-gpio";
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <27 2>;
-			reg = <0xFF141000 0x1000>;
+			reg = <0xff141000 0x1000>;
 			gpio-controller;
 			#gpio-cells = <2>;
 			abilis,ngpio = <2>;
 			gpio-ranges = <&iomux 0 0 0>;
 			gpio-ranges-group-names = "gpiob";
 		};
-		gpioc: gpio@FF142000 {
+		gpioc: gpio@ff142000 {
 			compatible = "abilis,tb10x-gpio";
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <27 2>;
-			reg = <0xFF142000 0x1000>;
+			reg = <0xff142000 0x1000>;
 			gpio-controller;
 			#gpio-cells = <2>;
 			abilis,ngpio = <3>;
 			gpio-ranges = <&iomux 0 0 0>;
 			gpio-ranges-group-names = "gpioc";
 		};
-		gpiod: gpio@FF143000 {
+		gpiod: gpio@ff143000 {
 			compatible = "abilis,tb10x-gpio";
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <27 2>;
-			reg = <0xFF143000 0x1000>;
+			reg = <0xff143000 0x1000>;
 			gpio-controller;
 			#gpio-cells = <2>;
 			abilis,ngpio = <2>;
 			gpio-ranges = <&iomux 0 0 0>;
 			gpio-ranges-group-names = "gpiod";
 		};
-		gpioe: gpio@FF144000 {
+		gpioe: gpio@ff144000 {
 			compatible = "abilis,tb10x-gpio";
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <27 2>;
-			reg = <0xFF144000 0x1000>;
+			reg = <0xff144000 0x1000>;
 			gpio-controller;
 			#gpio-cells = <2>;
 			abilis,ngpio = <3>;
 			gpio-ranges = <&iomux 0 0 0>;
 			gpio-ranges-group-names = "gpioe";
 		};
-		gpiof: gpio@FF145000 {
+		gpiof: gpio@ff145000 {
 			compatible = "abilis,tb10x-gpio";
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <27 2>;
-			reg = <0xFF145000 0x1000>;
+			reg = <0xff145000 0x1000>;
 			gpio-controller;
 			#gpio-cells = <2>;
 			abilis,ngpio = <2>;
 			gpio-ranges = <&iomux 0 0 0>;
 			gpio-ranges-group-names = "gpiof";
 		};
-		gpiog: gpio@FF146000 {
+		gpiog: gpio@ff146000 {
 			compatible = "abilis,tb10x-gpio";
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <27 2>;
-			reg = <0xFF146000 0x1000>;
+			reg = <0xff146000 0x1000>;
 			gpio-controller;
 			#gpio-cells = <2>;
 			abilis,ngpio = <3>;
 			gpio-ranges = <&iomux 0 0 0>;
 			gpio-ranges-group-names = "gpiog";
 		};
-		gpioh: gpio@FF147000 {
+		gpioh: gpio@ff147000 {
 			compatible = "abilis,tb10x-gpio";
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <27 2>;
-			reg = <0xFF147000 0x1000>;
+			reg = <0xff147000 0x1000>;
 			gpio-controller;
 			#gpio-cells = <2>;
 			abilis,ngpio = <2>;
 			gpio-ranges = <&iomux 0 0 0>;
 			gpio-ranges-group-names = "gpioh";
 		};
-		gpioi: gpio@FF148000 {
+		gpioi: gpio@ff148000 {
 			compatible = "abilis,tb10x-gpio";
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <27 2>;
-			reg = <0xFF148000 0x1000>;
+			reg = <0xff148000 0x1000>;
 			gpio-controller;
 			#gpio-cells = <2>;
 			abilis,ngpio = <12>;
 			gpio-ranges = <&iomux 0 0 0>;
 			gpio-ranges-group-names = "gpioi";
 		};
-		gpioj: gpio@FF149000 {
+		gpioj: gpio@ff149000 {
 			compatible = "abilis,tb10x-gpio";
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <27 2>;
-			reg = <0xFF149000 0x1000>;
+			reg = <0xff149000 0x1000>;
 			gpio-controller;
 			#gpio-cells = <2>;
 			abilis,ngpio = <32>;
 			gpio-ranges = <&iomux 0 0 0>;
 			gpio-ranges-group-names = "gpioj";
 		};
-		gpiok: gpio@FF14a000 {
+		gpiok: gpio@ff14a000 {
 			compatible = "abilis,tb10x-gpio";
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <27 2>;
-			reg = <0xFF14A000 0x1000>;
+			reg = <0xff14a000 0x1000>;
 			gpio-controller;
 			#gpio-cells = <2>;
 			abilis,ngpio = <22>;
 			gpio-ranges = <&iomux 0 0 0>;
 			gpio-ranges-group-names = "gpiok";
 		};
-		gpiol: gpio@FF14b000 {
+		gpiol: gpio@ff14b000 {
 			compatible = "abilis,tb10x-gpio";
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <27 2>;
-			reg = <0xFF14B000 0x1000>;
+			reg = <0xff14b000 0x1000>;
 			gpio-controller;
 			#gpio-cells = <2>;
 			abilis,ngpio = <4>;
 			gpio-ranges = <&iomux 0 0 0>;
 			gpio-ranges-group-names = "gpiol";
 		};
-		gpiom: gpio@FF14c000 {
+		gpiom: gpio@ff14c000 {
 			compatible = "abilis,tb10x-gpio";
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <27 2>;
-			reg = <0xFF14C000 0x1000>;
+			reg = <0xff14c000 0x1000>;
 			gpio-controller;
 			#gpio-cells = <2>;
 			abilis,ngpio = <4>;
 			gpio-ranges = <&iomux 0 0 0>;
 			gpio-ranges-group-names = "gpiom";
 		};
-		gpion: gpio@FF14d000 {
+		gpion: gpio@ff14d000 {
 			compatible = "abilis,tb10x-gpio";
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <27 2>;
-			reg = <0xFF14D000 0x1000>;
+			reg = <0xff14d000 0x1000>;
 			gpio-controller;
 			#gpio-cells = <2>;
 			abilis,ngpio = <5>;
diff --git a/arch/arc/boot/dts/abilis_tb100_dvk.dts b/arch/arc/boot/dts/abilis_tb100_dvk.dts
index 3acf04db8030..c968e677db46 100644
--- a/arch/arc/boot/dts/abilis_tb100_dvk.dts
+++ b/arch/arc/boot/dts/abilis_tb100_dvk.dts
@@ -37,27 +37,27 @@
 	};
 
 	soc100 {
-		uart@FF100000 {
+		uart@ff100000 {
 			pinctrl-names = "default";
 			pinctrl-0 = <&pctl_uart0>;
 		};
-		ethernet@FE100000 {
+		ethernet@fe100000 {
 			phy-mode = "rgmii";
 		};
 
-		i2c0: i2c@FF120000 {
+		i2c0: i2c@ff120000 {
 			i2c-sda-hold-time-ns = <432>;
 		};
-		i2c1: i2c@FF121000 {
+		i2c1: i2c@ff121000 {
 			i2c-sda-hold-time-ns = <432>;
 		};
-		i2c2: i2c@FF122000 {
+		i2c2: i2c@ff122000 {
 			i2c-sda-hold-time-ns = <432>;
 		};
-		i2c3: i2c@FF123000 {
+		i2c3: i2c@ff123000 {
 			i2c-sda-hold-time-ns = <432>;
 		};
-		i2c4: i2c@FF124000 {
+		i2c4: i2c@ff124000 {
 			i2c-sda-hold-time-ns = <432>;
 		};
 
diff --git a/arch/arc/boot/dts/abilis_tb101.dtsi b/arch/arc/boot/dts/abilis_tb101.dtsi
index f9e7686044eb..6a1615f58f05 100644
--- a/arch/arc/boot/dts/abilis_tb101.dtsi
+++ b/arch/arc/boot/dts/abilis_tb101.dtsi
@@ -38,7 +38,7 @@
 			clock-div = <6>;
 		};
 
-		iomux: iomux@FF10601c {
+		iomux: iomux@ff10601c {
 			/* Port 1 */
 			pctl_tsin_s0: pctl-tsin-s0 {   /* Serial TS-in 0 */
 				abilis,function = "mis0";
@@ -171,182 +171,182 @@
 			};
 		};
 
-		gpioa: gpio@FF140000 {
+		gpioa: gpio@ff140000 {
 			compatible = "abilis,tb10x-gpio";
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <27 2>;
-			reg = <0xFF140000 0x1000>;
+			reg = <0xff140000 0x1000>;
 			gpio-controller;
 			#gpio-cells = <2>;
 			abilis,ngpio = <3>;
 			gpio-ranges = <&iomux 0 0 0>;
 			gpio-ranges-group-names = "gpioa";
 		};
-		gpiob: gpio@FF141000 {
+		gpiob: gpio@ff141000 {
 			compatible = "abilis,tb10x-gpio";
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <27 2>;
-			reg = <0xFF141000 0x1000>;
+			reg = <0xff141000 0x1000>;
 			gpio-controller;
 			#gpio-cells = <2>;
 			abilis,ngpio = <2>;
 			gpio-ranges = <&iomux 0 0 0>;
 			gpio-ranges-group-names = "gpiob";
 		};
-		gpioc: gpio@FF142000 {
+		gpioc: gpio@ff142000 {
 			compatible = "abilis,tb10x-gpio";
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <27 2>;
-			reg = <0xFF142000 0x1000>;
+			reg = <0xff142000 0x1000>;
 			gpio-controller;
 			#gpio-cells = <2>;
 			abilis,ngpio = <3>;
 			gpio-ranges = <&iomux 0 0 0>;
 			gpio-ranges-group-names = "gpioc";
 		};
-		gpiod: gpio@FF143000 {
+		gpiod: gpio@ff143000 {
 			compatible = "abilis,tb10x-gpio";
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <27 2>;
-			reg = <0xFF143000 0x1000>;
+			reg = <0xff143000 0x1000>;
 			gpio-controller;
 			#gpio-cells = <2>;
 			abilis,ngpio = <2>;
 			gpio-ranges = <&iomux 0 0 0>;
 			gpio-ranges-group-names = "gpiod";
 		};
-		gpioe: gpio@FF144000 {
+		gpioe: gpio@ff144000 {
 			compatible = "abilis,tb10x-gpio";
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <27 2>;
-			reg = <0xFF144000 0x1000>;
+			reg = <0xff144000 0x1000>;
 			gpio-controller;
 			#gpio-cells = <2>;
 			abilis,ngpio = <3>;
 			gpio-ranges = <&iomux 0 0 0>;
 			gpio-ranges-group-names = "gpioe";
 		};
-		gpiof: gpio@FF145000 {
+		gpiof: gpio@ff145000 {
 			compatible = "abilis,tb10x-gpio";
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <27 2>;
-			reg = <0xFF145000 0x1000>;
+			reg = <0xff145000 0x1000>;
 			gpio-controller;
 			#gpio-cells = <2>;
 			abilis,ngpio = <2>;
 			gpio-ranges = <&iomux 0 0 0>;
 			gpio-ranges-group-names = "gpiof";
 		};
-		gpiog: gpio@FF146000 {
+		gpiog: gpio@ff146000 {
 			compatible = "abilis,tb10x-gpio";
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <27 2>;
-			reg = <0xFF146000 0x1000>;
+			reg = <0xff146000 0x1000>;
 			gpio-controller;
 			#gpio-cells = <2>;
 			abilis,ngpio = <3>;
 			gpio-ranges = <&iomux 0 0 0>;
 			gpio-ranges-group-names = "gpiog";
 		};
-		gpioh: gpio@FF147000 {
+		gpioh: gpio@ff147000 {
 			compatible = "abilis,tb10x-gpio";
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <27 2>;
-			reg = <0xFF147000 0x1000>;
+			reg = <0xff147000 0x1000>;
 			gpio-controller;
 			#gpio-cells = <2>;
 			abilis,ngpio = <2>;
 			gpio-ranges = <&iomux 0 0 0>;
 			gpio-ranges-group-names = "gpioh";
 		};
-		gpioi: gpio@FF148000 {
+		gpioi: gpio@ff148000 {
 			compatible = "abilis,tb10x-gpio";
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <27 2>;
-			reg = <0xFF148000 0x1000>;
+			reg = <0xff148000 0x1000>;
 			gpio-controller;
 			#gpio-cells = <2>;
 			abilis,ngpio = <12>;
 			gpio-ranges = <&iomux 0 0 0>;
 			gpio-ranges-group-names = "gpioi";
 		};
-		gpioj: gpio@FF149000 {
+		gpioj: gpio@ff149000 {
 			compatible = "abilis,tb10x-gpio";
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <27 2>;
-			reg = <0xFF149000 0x1000>;
+			reg = <0xff149000 0x1000>;
 			gpio-controller;
 			#gpio-cells = <2>;
 			abilis,ngpio = <32>;
 			gpio-ranges = <&iomux 0 0 0>;
 			gpio-ranges-group-names = "gpioj";
 		};
-		gpiok: gpio@FF14a000 {
+		gpiok: gpio@ff14a000 {
 			compatible = "abilis,tb10x-gpio";
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <27 2>;
-			reg = <0xFF14A000 0x1000>;
+			reg = <0xff14a000 0x1000>;
 			gpio-controller;
 			#gpio-cells = <2>;
 			abilis,ngpio = <22>;
 			gpio-ranges = <&iomux 0 0 0>;
 			gpio-ranges-group-names = "gpiok";
 		};
-		gpiol: gpio@FF14b000 {
+		gpiol: gpio@ff14b000 {
 			compatible = "abilis,tb10x-gpio";
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <27 2>;
-			reg = <0xFF14B000 0x1000>;
+			reg = <0xff14b000 0x1000>;
 			gpio-controller;
 			#gpio-cells = <2>;
 			abilis,ngpio = <4>;
 			gpio-ranges = <&iomux 0 0 0>;
 			gpio-ranges-group-names = "gpiol";
 		};
-		gpiom: gpio@FF14c000 {
+		gpiom: gpio@ff14c000 {
 			compatible = "abilis,tb10x-gpio";
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <27 2>;
-			reg = <0xFF14C000 0x1000>;
+			reg = <0xff14c000 0x1000>;
 			gpio-controller;
 			#gpio-cells = <2>;
 			abilis,ngpio = <4>;
 			gpio-ranges = <&iomux 0 0 0>;
 			gpio-ranges-group-names = "gpiom";
 		};
-		gpion: gpio@FF14d000 {
+		gpion: gpio@ff14d000 {
 			compatible = "abilis,tb10x-gpio";
 			interrupt-controller;
 			#interrupt-cells = <1>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <27 2>;
-			reg = <0xFF14D000 0x1000>;
+			reg = <0xff14d000 0x1000>;
 			gpio-controller;
 			#gpio-cells = <2>;
 			abilis,ngpio = <5>;
diff --git a/arch/arc/boot/dts/abilis_tb101_dvk.dts b/arch/arc/boot/dts/abilis_tb101_dvk.dts
index 37d88c5dd181..05143ce9c120 100644
--- a/arch/arc/boot/dts/abilis_tb101_dvk.dts
+++ b/arch/arc/boot/dts/abilis_tb101_dvk.dts
@@ -37,27 +37,27 @@
 	};
 
 	soc100 {
-		uart@FF100000 {
+		uart@ff100000 {
 			pinctrl-names = "default";
 			pinctrl-0 = <&pctl_uart0>;
 		};
-		ethernet@FE100000 {
+		ethernet@fe100000 {
 			phy-mode = "rgmii";
 		};
 
-		i2c0: i2c@FF120000 {
+		i2c0: i2c@ff120000 {
 			i2c-sda-hold-time-ns = <432>;
 		};
-		i2c1: i2c@FF121000 {
+		i2c1: i2c@ff121000 {
 			i2c-sda-hold-time-ns = <432>;
 		};
-		i2c2: i2c@FF122000 {
+		i2c2: i2c@ff122000 {
 			i2c-sda-hold-time-ns = <432>;
 		};
-		i2c3: i2c@FF123000 {
+		i2c3: i2c@ff123000 {
 			i2c-sda-hold-time-ns = <432>;
 		};
-		i2c4: i2c@FF124000 {
+		i2c4: i2c@ff124000 {
 			i2c-sda-hold-time-ns = <432>;
 		};
 
diff --git a/arch/arc/boot/dts/abilis_tb10x.dtsi b/arch/arc/boot/dts/abilis_tb10x.dtsi
index 3121536b25a3..2fbf1bdfe6de 100644
--- a/arch/arc/boot/dts/abilis_tb10x.dtsi
+++ b/arch/arc/boot/dts/abilis_tb10x.dtsi
@@ -54,7 +54,7 @@
 		#size-cells	= <1>;
 		device_type	= "soc";
 		ranges		= <0xfe000000 0xfe000000 0x02000000
-				0x000F0000 0x000F0000 0x00010000>;
+				0x000f0000 0x000f0000 0x00010000>;
 		compatible	= "abilis,tb10x", "simple-bus";
 
 		pll0: oscillator {
@@ -75,10 +75,10 @@
 			clock-output-names = "ahb_clk";
 		};
 
-		iomux: iomux@FF10601c {
+		iomux: iomux@ff10601c {
 			compatible = "abilis,tb10x-iomux";
 			#gpio-range-cells = <3>;
-			reg = <0xFF10601c 0x4>;
+			reg = <0xff10601c 0x4>;
 		};
 
 		intc: interrupt-controller {
@@ -88,7 +88,7 @@
 		};
 		tb10x_ictl: pic@fe002000 {
 			compatible = "abilis,tb10x-ictl";
-			reg = <0xFE002000 0x20>;
+			reg = <0xfe002000 0x20>;
 			interrupt-controller;
 			#interrupt-cells = <2>;
 			interrupt-parent = <&intc>;
@@ -96,27 +96,27 @@
 					20 21 22 23 24 25 26 27 28 29 30 31>;
 		};
 
-		uart@FF100000 {
+		uart@ff100000 {
 			compatible = "snps,dw-apb-uart";
-			reg = <0xFF100000 0x100>;
+			reg = <0xff100000 0x100>;
 			clock-frequency = <166666666>;
 			interrupts = <25 8>;
 			reg-shift = <2>;
 			reg-io-width = <4>;
 			interrupt-parent = <&tb10x_ictl>;
 		};
-		ethernet@FE100000 {
+		ethernet@fe100000 {
 			compatible = "snps,dwmac-3.70a","snps,dwmac";
-			reg = <0xFE100000 0x1058>;
+			reg = <0xfe100000 0x1058>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <6 8>;
 			interrupt-names = "macirq";
 			clocks = <&ahb_clk>;
 			clock-names = "stmmaceth";
 		};
-		dma@FE000000 {
+		dma@fe000000 {
 			compatible = "snps,dma-spear1340";
-			reg = <0xFE000000 0x400>;
+			reg = <0xfe000000 0x400>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <14 8>;
 			dma-channels = <6>;
@@ -132,70 +132,70 @@
 			multi-block = <1 1 1 1 1 1>;
 		};
 
-		i2c0: i2c@FF120000 {
+		i2c0: i2c@ff120000 {
 			#address-cells = <1>;
 			#size-cells = <0>;
 			compatible = "snps,designware-i2c";
-			reg = <0xFF120000 0x1000>;
+			reg = <0xff120000 0x1000>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <12 8>;
 			clocks = <&ahb_clk>;
 		};
-		i2c1: i2c@FF121000 {
+		i2c1: i2c@ff121000 {
 			#address-cells = <1>;
 			#size-cells = <0>;
 			compatible = "snps,designware-i2c";
-			reg = <0xFF121000 0x1000>;
+			reg = <0xff121000 0x1000>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <12 8>;
 			clocks = <&ahb_clk>;
 		};
-		i2c2: i2c@FF122000 {
+		i2c2: i2c@ff122000 {
 			#address-cells = <1>;
 			#size-cells = <0>;
 			compatible = "snps,designware-i2c";
-			reg = <0xFF122000 0x1000>;
+			reg = <0xff122000 0x1000>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <12 8>;
 			clocks = <&ahb_clk>;
 		};
-		i2c3: i2c@FF123000 {
+		i2c3: i2c@ff123000 {
 			#address-cells = <1>;
 			#size-cells = <0>;
 			compatible = "snps,designware-i2c";
-			reg = <0xFF123000 0x1000>;
+			reg = <0xff123000 0x1000>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <12 8>;
 			clocks = <&ahb_clk>;
 		};
-		i2c4: i2c@FF124000 {
+		i2c4: i2c@ff124000 {
 			#address-cells = <1>;
 			#size-cells = <0>;
 			compatible = "snps,designware-i2c";
-			reg = <0xFF124000 0x1000>;
+			reg = <0xff124000 0x1000>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <12 8>;
 			clocks = <&ahb_clk>;
 		};
 
-		spi0: spi@0xFE010000 {
+		spi0: spi@fe010000 {
 			#address-cells = <1>;
 			#size-cells = <0>;
 			cell-index = <0>;
 			compatible = "abilis,tb100-spi";
 			num-cs = <1>;
-			reg = <0xFE010000 0x20>;
+			reg = <0xfe010000 0x20>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <26 8>;
 			clocks = <&ahb_clk>;
 		};
-		spi1: spi@0xFE011000 {
+		spi1: spi@fe011000 {
 			#address-cells = <1>;
 			#size-cells = <0>;
 			cell-index = <1>;
 			compatible = "abilis,tb100-spi";
 			num-cs = <2>;
-			reg = <0xFE011000 0x20>;
+			reg = <0xfe011000 0x20>;
 			interrupt-parent = <&tb10x_ictl>;
 			interrupts = <10 8>;
 			clocks = <&ahb_clk>;
@@ -226,23 +226,23 @@
 			interrupts = <20 2>, <19 2>;
 			interrupt-names = "cmd_irq", "event_irq";
 		};
-		tb10x_mdsc0: tb10x-mdscr@FF300000 {
+		tb10x_mdsc0: tb10x-mdscr@ff300000 {
 			compatible = "abilis,tb100-mdscr";
-			reg = <0xFF300000 0x7000>;
+			reg = <0xff300000 0x7000>;
 			tb100-mdscr-manage-tsin;
 		};
-		tb10x_mscr0: tb10x-mdscr@FF307000 {
+		tb10x_mscr0: tb10x-mdscr@ff307000 {
 			compatible = "abilis,tb100-mdscr";
-			reg = <0xFF307000 0x7000>;
+			reg = <0xff307000 0x7000>;
 		};
 		tb10x_scr0: tb10x-mdscr@ff30e000 {
 			compatible = "abilis,tb100-mdscr";
-			reg = <0xFF30e000 0x4000>;
+			reg = <0xff30e000 0x4000>;
 			tb100-mdscr-manage-tsin;
 		};
 		tb10x_scr1: tb10x-mdscr@ff312000 {
 			compatible = "abilis,tb100-mdscr";
-			reg = <0xFF312000 0x4000>;
+			reg = <0xff312000 0x4000>;
 			tb100-mdscr-manage-tsin;
 		};
 		tb10x_wfb: tb10x-wfb@ff319000 {
diff --git a/arch/arc/boot/dts/axc001.dtsi b/arch/arc/boot/dts/axc001.dtsi
index fdc266504ada..37be3bf03ad6 100644
--- a/arch/arc/boot/dts/axc001.dtsi
+++ b/arch/arc/boot/dts/axc001.dtsi
@@ -41,7 +41,7 @@
 		 * this GPIO block ORs all interrupts on CPU card (creg,..)
 		 * to uplink only 1 IRQ to ARC core intc
 		 */
-		dw-apb-gpio@0x2000 {
+		dw-apb-gpio@2000 {
 			compatible = "snps,dw-apb-gpio";
 			reg = < 0x2000 0x80 >;
 			#address-cells = <1>;
@@ -60,7 +60,7 @@
 			};
 		};
 
-		debug_uart: dw-apb-uart@0x5000 {
+		debug_uart: dw-apb-uart@5000 {
 			compatible = "snps,dw-apb-uart";
 			reg = <0x5000 0x100>;
 			clock-frequency = <33333000>;
@@ -88,7 +88,7 @@
 	 * avoid duplicating the MB dtsi file given that IRQ from
 	 * this intc to cpu intc are different for axs101 and axs103
 	 */
-	mb_intc: dw-apb-ictl@0xe0012000 {
+	mb_intc: dw-apb-ictl@e0012000 {
 		#interrupt-cells = <1>;
 		compatible = "snps,dw-apb-ictl";
 		reg = < 0x0 0xe0012000 0x0 0x200 >;
diff --git a/arch/arc/boot/dts/axc003.dtsi b/arch/arc/boot/dts/axc003.dtsi
index d75d65ddf8e3..effa37536d7a 100644
--- a/arch/arc/boot/dts/axc003.dtsi
+++ b/arch/arc/boot/dts/axc003.dtsi
@@ -55,7 +55,7 @@
 		 * this GPIO block ORs all interrupts on CPU card (creg,..)
 		 * to uplink only 1 IRQ to ARC core intc
 		 */
-		dw-apb-gpio@0x2000 {
+		dw-apb-gpio@2000 {
 			compatible = "snps,dw-apb-gpio";
 			reg = < 0x2000 0x80 >;
 			#address-cells = <1>;
@@ -74,7 +74,7 @@
 			};
 		};
 
-		debug_uart: dw-apb-uart@0x5000 {
+		debug_uart: dw-apb-uart@5000 {
 			compatible = "snps,dw-apb-uart";
 			reg = <0x5000 0x100>;
 			clock-frequency = <33333000>;
@@ -102,19 +102,19 @@
 	 * external DMA buffer located outside of IOC aperture.
 	 */
 	axs10x_mb {
-		ethernet@0x18000 {
+		ethernet@18000 {
 			dma-coherent;
 		};
 
-		ehci@0x40000 {
+		ehci@40000 {
 			dma-coherent;
 		};
 
-		ohci@0x60000 {
+		ohci@60000 {
 			dma-coherent;
 		};
 
-		mmc@0x15000 {
+		mmc@15000 {
 			dma-coherent;
 		};
 	};
@@ -132,7 +132,7 @@
 	 * avoid duplicating the MB dtsi file given that IRQ from
 	 * this intc to cpu intc are different for axs101 and axs103
 	 */
-	mb_intc: dw-apb-ictl@0xe0012000 {
+	mb_intc: dw-apb-ictl@e0012000 {
 		#interrupt-cells = <1>;
 		compatible = "snps,dw-apb-ictl";
 		reg = < 0x0 0xe0012000 0x0 0x200 >;
@@ -153,7 +153,7 @@
 		#size-cells = <2>;
 		ranges;
 		/*
-		 * Move frame buffer out of IOC aperture (0x8z-0xAz).
+		 * Move frame buffer out of IOC aperture (0x8z-0xaz).
 		 */
 		frame_buffer: frame_buffer@be000000 {
 			compatible = "shared-dma-pool";
diff --git a/arch/arc/boot/dts/axc003_idu.dtsi b/arch/arc/boot/dts/axc003_idu.dtsi
index a05bb737ea63..e401e59f6180 100644
--- a/arch/arc/boot/dts/axc003_idu.dtsi
+++ b/arch/arc/boot/dts/axc003_idu.dtsi
@@ -62,7 +62,7 @@
 		 * this GPIO block ORs all interrupts on CPU card (creg,..)
 		 * to uplink only 1 IRQ to ARC core intc
 		 */
-		dw-apb-gpio@0x2000 {
+		dw-apb-gpio@2000 {
 			compatible = "snps,dw-apb-gpio";
 			reg = < 0x2000 0x80 >;
 			#address-cells = <1>;
@@ -81,7 +81,7 @@
 			};
 		};
 
-		debug_uart: dw-apb-uart@0x5000 {
+		debug_uart: dw-apb-uart@5000 {
 			compatible = "snps,dw-apb-uart";
 			reg = <0x5000 0x100>;
 			clock-frequency = <33333000>;
@@ -109,19 +109,19 @@
 	 * external DMA buffer located outside of IOC aperture.
 	 */
 	axs10x_mb {
-		ethernet@0x18000 {
+		ethernet@18000 {
 			dma-coherent;
 		};
 
-		ehci@0x40000 {
+		ehci@40000 {
 			dma-coherent;
 		};
 
-		ohci@0x60000 {
+		ohci@60000 {
 			dma-coherent;
 		};
 
-		mmc@0x15000 {
+		mmc@15000 {
 			dma-coherent;
 		};
 	};
@@ -138,7 +138,7 @@
 	 * avoid duplicating the MB dtsi file given that IRQ from
 	 * this intc to cpu intc are different for axs101 and axs103
 	 */
-	mb_intc: dw-apb-ictl@0xe0012000 {
+	mb_intc: dw-apb-ictl@e0012000 {
 		#interrupt-cells = <1>;
 		compatible = "snps,dw-apb-ictl";
 		reg = < 0x0 0xe0012000 0x0 0x200 >;
@@ -159,7 +159,7 @@
 		#size-cells = <2>;
 		ranges;
 		/*
-		 * Move frame buffer out of IOC aperture (0x8z-0xAz).
+		 * Move frame buffer out of IOC aperture (0x8z-0xaz).
 		 */
 		frame_buffer: frame_buffer@be000000 {
 			compatible = "shared-dma-pool";
diff --git a/arch/arc/boot/dts/axs10x_mb.dtsi b/arch/arc/boot/dts/axs10x_mb.dtsi
index 37bafd44e36d..4ead6dc9af2f 100644
--- a/arch/arc/boot/dts/axs10x_mb.dtsi
+++ b/arch/arc/boot/dts/axs10x_mb.dtsi
@@ -72,7 +72,7 @@
 			};
 		};
 
-		gmac: ethernet@0x18000 {
+		gmac: ethernet@18000 {
 			#interrupt-cells = <1>;
 			compatible = "snps,dwmac";
 			reg = < 0x18000 0x2000 >;
@@ -88,13 +88,13 @@
 			mac-address = [00 00 00 00 00 00]; /* Filled in by U-Boot */
 		};
 
-		ehci@0x40000 {
+		ehci@40000 {
 			compatible = "generic-ehci";
 			reg = < 0x40000 0x100 >;
 			interrupts = < 8 >;
 		};
 
-		ohci@0x60000 {
+		ohci@60000 {
 			compatible = "generic-ohci";
 			reg = < 0x60000 0x100 >;
 			interrupts = < 8 >;
@@ -118,7 +118,7 @@
 		 * dw_mci_pltfm_prepare_command() is used in generic platform
 		 * code.
 		 */
-		mmc@0x15000 {
+		mmc@15000 {
 			compatible = "altr,socfpga-dw-mshc";
 			reg = < 0x15000 0x400 >;
 			fifo-depth = < 16 >;
@@ -129,7 +129,7 @@
 			bus-width = < 4 >;
 		};
 
-		uart@0x20000 {
+		uart@20000 {
 			compatible = "snps,dw-apb-uart";
 			reg = <0x20000 0x100>;
 			clock-frequency = <33333333>;
@@ -139,7 +139,7 @@
 			reg-io-width = <4>;
 		};
 
-		uart@0x21000 {
+		uart@21000 {
 			compatible = "snps,dw-apb-uart";
 			reg = <0x21000 0x100>;
 			clock-frequency = <33333333>;
@@ -150,7 +150,7 @@
 		};
 
 		/* UART muxed with USB data port (ttyS3) */
-		uart@0x22000 {
+		uart@22000 {
 			compatible = "snps,dw-apb-uart";
 			reg = <0x22000 0x100>;
 			clock-frequency = <33333333>;
@@ -160,7 +160,7 @@
 			reg-io-width = <4>;
 		};
 
-		i2c@0x1d000 {
+		i2c@1d000 {
 			compatible = "snps,designware-i2c";
 			reg = <0x1d000 0x100>;
 			clock-frequency = <400000>;
@@ -177,7 +177,7 @@
 			#sound-dai-cells = <0>;
 		};
 
-		i2c@0x1f000 {
+		i2c@1f000 {
 			compatible = "snps,designware-i2c";
 			#address-cells = <1>;
 			#size-cells = <0>;
@@ -218,13 +218,13 @@
 				};
 			};
 
-			eeprom@0x54{
+			eeprom@54{
 				compatible = "atmel,24c01";
 				reg = <0x54>;
 				pagesize = <0x8>;
 			};
 
-			eeprom@0x57{
+			eeprom@57{
 				compatible = "atmel,24c04";
 				reg = <0x57>;
 				pagesize = <0x8>;
diff --git a/arch/arc/boot/dts/hsdk.dts b/arch/arc/boot/dts/hsdk.dts
index 43f17b51ee89..69bc1c9e8e50 100644
--- a/arch/arc/boot/dts/hsdk.dts
+++ b/arch/arc/boot/dts/hsdk.dts
@@ -110,12 +110,12 @@
 		cgu_rst: reset-controller@8a0 {
 			compatible = "snps,hsdk-reset";
 			#reset-cells = <1>;
-			reg = <0x8A0 0x4>, <0xFF0 0x4>;
+			reg = <0x8a0 0x4>, <0xff0 0x4>;
 		};
 
 		core_clk: core-clk@0 {
 			compatible = "snps,hsdk-core-pll-clock";
-			reg = <0x00 0x10>, <0x14B8 0x4>;
+			reg = <0x00 0x10>, <0x14b8 0x4>;
 			#clock-cells = <0>;
 			clocks = <&input_clk>;
 
@@ -167,6 +167,18 @@
 			#clock-cells = <0>;
 		};
 
+		dmac_core_clk: dmac-core-clk {
+			compatible = "fixed-clock";
+			clock-frequency = <400000000>;
+			#clock-cells = <0>;
+		};
+
+		dmac_cfg_clk: dmac-gpu-cfg-clk {
+			compatible = "fixed-clock";
+			clock-frequency = <200000000>;
+			#clock-cells = <0>;
+		};
+
 		gmac: ethernet@8000 {
 			#interrupt-cells = <1>;
 			compatible = "snps,dwmac";
@@ -200,6 +212,7 @@
 			compatible = "snps,hsdk-v1.0-ohci", "generic-ohci";
 			reg = <0x60000 0x100>;
 			interrupts = <15>;
+			resets = <&cgu_rst HSDK_USB_RESET>;
 			dma-coherent;
 		};
 
@@ -207,6 +220,7 @@
 			compatible = "snps,hsdk-v1.0-ehci", "generic-ehci";
 			reg = <0x40000 0x100>;
 			interrupts = <15>;
+			resets = <&cgu_rst HSDK_USB_RESET>;
 			dma-coherent;
 		};
 
@@ -237,6 +251,21 @@
 				reg = <0>;
 			};
 		};
+
+		dmac: dmac@80000 {
+			compatible = "snps,axi-dma-1.01a";
+			reg = <0x80000 0x400>;
+			interrupts = <27>;
+			clocks = <&dmac_core_clk>, <&dmac_cfg_clk>;
+			clock-names = "core-clk", "cfgr-clk";
+
+			dma-channels = <4>;
+			snps,dma-masters = <2>;
+			snps,data-width = <3>;
+			snps,block-size = <4096 4096 4096 4096>;
+			snps,priority = <0 1 2 3>;
+			snps,axi-max-burst-len = <16>;
+		};
 	};
 
 	memory@80000000 {
diff --git a/arch/arc/boot/dts/vdk_axc003.dtsi b/arch/arc/boot/dts/vdk_axc003.dtsi
index 0fd6ba985b16..84e8766c8ca2 100644
--- a/arch/arc/boot/dts/vdk_axc003.dtsi
+++ b/arch/arc/boot/dts/vdk_axc003.dtsi
@@ -36,7 +36,7 @@
 			#interrupt-cells = <1>;
 		};
 
-		debug_uart: dw-apb-uart@0x5000 {
+		debug_uart: dw-apb-uart@5000 {
 			compatible = "snps,dw-apb-uart";
 			reg = <0x5000 0x100>;
 			clock-frequency = <2403200>;
@@ -49,7 +49,7 @@
 
 	};
 
-	mb_intc: dw-apb-ictl@0xe0012000 {
+	mb_intc: dw-apb-ictl@e0012000 {
 		#interrupt-cells = <1>;
 		compatible = "snps,dw-apb-ictl";
 		reg = < 0xe0012000 0x200 >;
diff --git a/arch/arc/boot/dts/vdk_axc003_idu.dtsi b/arch/arc/boot/dts/vdk_axc003_idu.dtsi
index 28956f9a9f3d..eb7e705e8a27 100644
--- a/arch/arc/boot/dts/vdk_axc003_idu.dtsi
+++ b/arch/arc/boot/dts/vdk_axc003_idu.dtsi
@@ -44,7 +44,7 @@
 			#interrupt-cells = <1>;
 		};
 
-		debug_uart: dw-apb-uart@0x5000 {
+		debug_uart: dw-apb-uart@5000 {
 			compatible = "snps,dw-apb-uart";
 			reg = <0x5000 0x100>;
 			clock-frequency = <2403200>;
@@ -57,7 +57,7 @@
 
 	};
 
-	mb_intc: dw-apb-ictl@0xe0012000 {
+	mb_intc: dw-apb-ictl@e0012000 {
 		#interrupt-cells = <1>;
 		compatible = "snps,dw-apb-ictl";
 		reg = < 0xe0012000 0x200 >;
diff --git a/arch/arc/boot/dts/vdk_axs10x_mb.dtsi b/arch/arc/boot/dts/vdk_axs10x_mb.dtsi
index 48bb4b4cd234..925d5cc95dbb 100644
--- a/arch/arc/boot/dts/vdk_axs10x_mb.dtsi
+++ b/arch/arc/boot/dts/vdk_axs10x_mb.dtsi
@@ -36,7 +36,7 @@
 			};
 		};
 
-		ethernet@0x18000 {
+		ethernet@18000 {
 			#interrupt-cells = <1>;
 			compatible = "snps,dwmac";
 			reg = < 0x18000 0x2000 >;
@@ -49,13 +49,13 @@
 			clock-names = "stmmaceth";
 		};
 
-		ehci@0x40000 {
+		ehci@40000 {
 			compatible = "generic-ehci";
 			reg = < 0x40000 0x100 >;
 			interrupts = < 8 >;
 		};
 
-		uart@0x20000 {
+		uart@20000 {
 			compatible = "snps,dw-apb-uart";
 			reg = <0x20000 0x100>;
 			clock-frequency = <2403200>;
@@ -65,7 +65,7 @@
 			reg-io-width = <4>;
 		};
 
-		uart@0x21000 {
+		uart@21000 {
 			compatible = "snps,dw-apb-uart";
 			reg = <0x21000 0x100>;
 			clock-frequency = <2403200>;
@@ -75,7 +75,7 @@
 			reg-io-width = <4>;
 		};
 
-		uart@0x22000 {
+		uart@22000 {
 			compatible = "snps,dw-apb-uart";
 			reg = <0x22000 0x100>;
 			clock-frequency = <2403200>;
@@ -101,7 +101,7 @@
 			interrupt-names = "arc_ps2_irq";
 		};
 
-		mmc@0x15000 {
+		mmc@15000 {
 			compatible = "snps,dw-mshc";
 			reg = <0x15000 0x400>;
 			fifo-depth = <1024>;
@@ -117,11 +117,11 @@
 	 * Embedded Vision subsystem UIO mappings; only relevant for EV VDK
 	 *
 	 * This node is intentionally put outside of MB above becase
-	 * it maps areas outside of MB's 0xEz-0xFz.
+	 * it maps areas outside of MB's 0xez-0xfz.
 	 */
-	uio_ev: uio@0xD0000000 {
+	uio_ev: uio@d0000000 {
 		compatible = "generic-uio";
-		reg = <0xD0000000 0x2000 0xD1000000 0x2000 0x90000000 0x10000000 0xC0000000 0x10000000>;
+		reg = <0xd0000000 0x2000 0xd1000000 0x2000 0x90000000 0x10000000 0xc0000000 0x10000000>;
 		reg-names = "ev_gsa", "ev_ctrl", "ev_shared_mem", "ev_code_mem";
 		interrupt-parent = <&mb_intc>;
 		interrupts = <23>;
diff --git a/arch/arc/configs/hsdk_defconfig b/arch/arc/configs/hsdk_defconfig
index 6fd3d29546af..0e5fd29ed238 100644
--- a/arch/arc/configs/hsdk_defconfig
+++ b/arch/arc/configs/hsdk_defconfig
@@ -8,6 +8,7 @@ CONFIG_NAMESPACES=y
 # CONFIG_UTS_NS is not set
 # CONFIG_PID_NS is not set
 CONFIG_BLK_DEV_INITRD=y
+CONFIG_BLK_DEV_RAM=y
 CONFIG_EMBEDDED=y
 CONFIG_PERF_EVENTS=y
 # CONFIG_VM_EVENT_COUNTERS is not set
diff --git a/arch/arc/include/asm/arcregs.h b/arch/arc/include/asm/arcregs.h
index a27eafdc8260..a7d4be87b2f0 100644
--- a/arch/arc/include/asm/arcregs.h
+++ b/arch/arc/include/asm/arcregs.h
@@ -82,6 +82,7 @@
 #define ECR_V_DTLB_MISS			0x05
 #define ECR_V_PROTV			0x06
 #define ECR_V_TRAP			0x09
+#define ECR_V_MISALIGN			0x0d
 #endif
 
 /* DTLB Miss and Protection Violation Cause Codes */
@@ -167,14 +168,6 @@ struct bcr_mpy {
 #endif
 };
 
-struct bcr_extn_xymem {
-#ifdef CONFIG_CPU_BIG_ENDIAN
-	unsigned int ram_org:2, num_banks:4, bank_sz:4, ver:8;
-#else
-	unsigned int ver:8, bank_sz:4, num_banks:4, ram_org:2;
-#endif
-};
-
 struct bcr_iccm_arcompact {
 #ifdef CONFIG_CPU_BIG_ENDIAN
 	unsigned int base:16, pad:5, sz:3, ver:8;
@@ -312,7 +305,7 @@ struct cpuinfo_arc {
 	struct cpuinfo_arc_bpu bpu;
 	struct bcr_identity core;
 	struct bcr_isa_arcv2 isa;
-	const char *details, *name;
+	const char *release, *name;
 	unsigned int vec_base;
 	struct cpuinfo_arc_ccm iccm, dccm;
 	struct {
@@ -322,7 +315,6 @@ struct cpuinfo_arc {
 			     timer0:1, timer1:1, rtc:1, gfrc:1, pad4:4;
 	} extn;
 	struct bcr_mpy extn_mpy;
-	struct bcr_extn_xymem extn_xymem;
 };
 
 extern struct cpuinfo_arc cpuinfo_arc700[];
diff --git a/arch/arc/include/asm/irqflags-arcv2.h b/arch/arc/include/asm/irqflags-arcv2.h
index 8a4f77ea3238..e66d0339e1d8 100644
--- a/arch/arc/include/asm/irqflags-arcv2.h
+++ b/arch/arc/include/asm/irqflags-arcv2.h
@@ -44,7 +44,13 @@
 #define ARCV2_IRQ_DEF_PRIO	1
 
 /* seed value for status register */
-#define ISA_INIT_STATUS_BITS	(STATUS_IE_MASK | STATUS_AD_MASK | \
+#ifdef CONFIG_ARC_USE_UNALIGNED_MEM_ACCESS
+#define __AD_ENB	STATUS_AD_MASK
+#else
+#define __AD_ENB	0
+#endif
+
+#define ISA_INIT_STATUS_BITS	(STATUS_IE_MASK | __AD_ENB | \
 					(ARCV2_IRQ_DEF_PRIO << 1))
 
 #ifndef __ASSEMBLY__
diff --git a/arch/arc/include/asm/perf_event.h b/arch/arc/include/asm/perf_event.h
index 6958545390f0..9cd7ee4fad39 100644
--- a/arch/arc/include/asm/perf_event.h
+++ b/arch/arc/include/asm/perf_event.h
@@ -105,10 +105,10 @@ static const char * const arc_pmu_ev_hw_map[] = {
 	[PERF_COUNT_HW_INSTRUCTIONS] = "iall",
 	/* All jump instructions that are taken */
 	[PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = "ijmptak",
-	[PERF_COUNT_ARC_BPOK]         = "bpok",	  /* NP-NT, PT-T, PNT-NT */
 #ifdef CONFIG_ISA_ARCV2
 	[PERF_COUNT_HW_BRANCH_MISSES] = "bpmp",
 #else
+	[PERF_COUNT_ARC_BPOK]         = "bpok",	  /* NP-NT, PT-T, PNT-NT */
 	[PERF_COUNT_HW_BRANCH_MISSES] = "bpfail", /* NP-T, PT-NT, PNT-T */
 #endif
 	[PERF_COUNT_ARC_LDC] = "imemrdc",	/* Instr: mem read cached */
diff --git a/arch/arc/include/asm/spinlock.h b/arch/arc/include/asm/spinlock.h
index 2ba04a7db621..daa914da7968 100644
--- a/arch/arc/include/asm/spinlock.h
+++ b/arch/arc/include/asm/spinlock.h
@@ -21,8 +21,6 @@ static inline void arch_spin_lock(arch_spinlock_t *lock)
 {
 	unsigned int val;
 
-	smp_mb();
-
 	__asm__ __volatile__(
 	"1:	llock	%[val], [%[slock]]	\n"
 	"	breq	%[val], %[LOCKED], 1b	\n"	/* spin while LOCKED */
@@ -34,6 +32,14 @@ static inline void arch_spin_lock(arch_spinlock_t *lock)
 	  [LOCKED]	"r"	(__ARCH_SPIN_LOCK_LOCKED__)
 	: "memory", "cc");
 
+	/*
+	 * ACQUIRE barrier to ensure load/store after taking the lock
+	 * don't "bleed-up" out of the critical section (leak-in is allowed)
+	 * http://www.spinics.net/lists/kernel/msg2010409.html
+	 *
+	 * ARCv2 only has load-load, store-store and all-all barrier
+	 * thus need the full all-all barrier
+	 */
 	smp_mb();
 }
 
@@ -42,8 +48,6 @@ static inline int arch_spin_trylock(arch_spinlock_t *lock)
 {
 	unsigned int val, got_it = 0;
 
-	smp_mb();
-
 	__asm__ __volatile__(
 	"1:	llock	%[val], [%[slock]]	\n"
 	"	breq	%[val], %[LOCKED], 4f	\n"	/* already LOCKED, just bail */
@@ -67,9 +71,7 @@ static inline void arch_spin_unlock(arch_spinlock_t *lock)
 {
 	smp_mb();
 
-	lock->slock = __ARCH_SPIN_LOCK_UNLOCKED__;
-
-	smp_mb();
+	WRITE_ONCE(lock->slock, __ARCH_SPIN_LOCK_UNLOCKED__);
 }
 
 /*
@@ -81,8 +83,6 @@ static inline void arch_read_lock(arch_rwlock_t *rw)
 {
 	unsigned int val;
 
-	smp_mb();
-
 	/*
 	 * zero means writer holds the lock exclusively, deny Reader.
 	 * Otherwise grant lock to first/subseq reader
@@ -113,8 +113,6 @@ static inline int arch_read_trylock(arch_rwlock_t *rw)
 {
 	unsigned int val, got_it = 0;
 
-	smp_mb();
-
 	__asm__ __volatile__(
 	"1:	llock	%[val], [%[rwlock]]	\n"
 	"	brls	%[val], %[WR_LOCKED], 4f\n"	/* <= 0: already write locked, bail */
@@ -140,8 +138,6 @@ static inline void arch_write_lock(arch_rwlock_t *rw)
 {
 	unsigned int val;
 
-	smp_mb();
-
 	/*
 	 * If reader(s) hold lock (lock < __ARCH_RW_LOCK_UNLOCKED__),
 	 * deny writer. Otherwise if unlocked grant to writer
@@ -175,8 +171,6 @@ static inline int arch_write_trylock(arch_rwlock_t *rw)
 {
 	unsigned int val, got_it = 0;
 
-	smp_mb();
-
 	__asm__ __volatile__(
 	"1:	llock	%[val], [%[rwlock]]	\n"
 	"	brne	%[val], %[UNLOCKED], 4f	\n"	/* !UNLOCKED, bail */
@@ -217,17 +211,13 @@ static inline void arch_read_unlock(arch_rwlock_t *rw)
 	: [val]		"=&r"	(val)
 	: [rwlock]	"r"	(&(rw->counter))
 	: "memory", "cc");
-
-	smp_mb();
 }
 
 static inline void arch_write_unlock(arch_rwlock_t *rw)
 {
 	smp_mb();
 
-	rw->counter = __ARCH_RW_LOCK_UNLOCKED__;
-
-	smp_mb();
+	WRITE_ONCE(rw->counter, __ARCH_RW_LOCK_UNLOCKED__);
 }
 
 #else	/* !CONFIG_ARC_HAS_LLSC */
@@ -237,10 +227,9 @@ static inline void arch_spin_lock(arch_spinlock_t *lock)
 	unsigned int val = __ARCH_SPIN_LOCK_LOCKED__;
 
 	/*
-	 * This smp_mb() is technically superfluous, we only need the one
-	 * after the lock for providing the ACQUIRE semantics.
-	 * However doing the "right" thing was regressing hackbench
-	 * so keeping this, pending further investigation
+	 * Per lkmm, smp_mb() is only required after _lock (and before_unlock)
+	 * for ACQ and REL semantics respectively. However EX based spinlocks
+	 * need the extra smp_mb to workaround a hardware quirk.
 	 */
 	smp_mb();
 
@@ -257,14 +246,6 @@ static inline void arch_spin_lock(arch_spinlock_t *lock)
 #endif
 	: "memory");
 
-	/*
-	 * ACQUIRE barrier to ensure load/store after taking the lock
-	 * don't "bleed-up" out of the critical section (leak-in is allowed)
-	 * http://www.spinics.net/lists/kernel/msg2010409.html
-	 *
-	 * ARCv2 only has load-load, store-store and all-all barrier
-	 * thus need the full all-all barrier
-	 */
 	smp_mb();
 }
 
@@ -309,8 +290,7 @@ static inline void arch_spin_unlock(arch_spinlock_t *lock)
 	: "memory");
 
 	/*
-	 * superfluous, but keeping for now - see pairing version in
-	 * arch_spin_lock above
+	 * see pairing version/comment in arch_spin_lock above
 	 */
 	smp_mb();
 }
@@ -344,7 +324,6 @@ static inline int arch_read_trylock(arch_rwlock_t *rw)
 	arch_spin_unlock(&(rw->lock_mutex));
 	local_irq_restore(flags);
 
-	smp_mb();
 	return ret;
 }
 
diff --git a/arch/arc/kernel/head.S b/arch/arc/kernel/head.S
index 30e090625916..8f6e0447dd17 100644
--- a/arch/arc/kernel/head.S
+++ b/arch/arc/kernel/head.S
@@ -54,7 +54,12 @@
 	; gcc 7.3.1 (ARC GNU 2018.03) onwards generates unaligned access
 	; by default
 	lr	r5, [status32]
+#ifdef CONFIG_ARC_USE_UNALIGNED_MEM_ACCESS
 	bset	r5, r5, STATUS_AD_BIT
+#else
+	; Although disabled at reset, bootloader might have enabled it
+	bclr	r5, r5, STATUS_AD_BIT
+#endif
 	kflag	r5
 #endif
 .endm
@@ -106,6 +111,7 @@ ENTRY(stext)
 	;    r2 = pointer to uboot provided cmdline or external DTB in mem
 	; These are handled later in handle_uboot_args()
 	st	r0, [@uboot_tag]
+	st      r1, [@uboot_magic]
 	st	r2, [@uboot_arg]
 
 	; setup "current" tsk and optionally cache it in dedicated r25
diff --git a/arch/arc/kernel/intc-arcv2.c b/arch/arc/kernel/intc-arcv2.c
index cf18b3e5a934..c0d0124de089 100644
--- a/arch/arc/kernel/intc-arcv2.c
+++ b/arch/arc/kernel/intc-arcv2.c
@@ -95,7 +95,7 @@ void arc_init_IRQ(void)
 
 	/* setup status32, don't enable intr yet as kernel doesn't want */
 	tmp = read_aux_reg(ARC_REG_STATUS32);
-	tmp |= STATUS_AD_MASK | (ARCV2_IRQ_DEF_PRIO << 1);
+	tmp |= ARCV2_IRQ_DEF_PRIO << 1;
 	tmp &= ~STATUS_IE_MASK;
 	asm volatile("kflag %0	\n"::"r"(tmp));
 }
diff --git a/arch/arc/kernel/setup.c b/arch/arc/kernel/setup.c
index 7b2340996cf8..a9c88b7e9182 100644
--- a/arch/arc/kernel/setup.c
+++ b/arch/arc/kernel/setup.c
@@ -36,6 +36,7 @@ unsigned int intr_to_DE_cnt;
 
 /* Part of U-boot ABI: see head.S */
 int __initdata uboot_tag;
+int __initdata uboot_magic;
 char __initdata *uboot_arg;
 
 const struct machine_desc *machine_desc;
@@ -44,29 +45,24 @@ struct task_struct *_current_task[NR_CPUS];	/* For stack switching */
 
 struct cpuinfo_arc cpuinfo_arc700[NR_CPUS];
 
-static const struct id_to_str arc_cpu_rel[] = {
+static const struct id_to_str arc_legacy_rel[] = {
+	/* ID.ARCVER,	Release */
 #ifdef CONFIG_ISA_ARCOMPACT
-	{ 0x34, "R4.10"},
-	{ 0x35, "R4.11"},
+	{ 0x34, 	"R4.10"},
+	{ 0x35, 	"R4.11"},
 #else
-	{ 0x51, "R2.0" },
-	{ 0x52, "R2.1" },
-	{ 0x53, "R3.0" },
-	{ 0x54, "R3.10a" },
+	{ 0x51, 	"R2.0" },
+	{ 0x52, 	"R2.1" },
+	{ 0x53,		"R3.0" },
 #endif
-	{ 0x00, NULL   }
+	{ 0x00,		NULL   }
 };
 
-static const struct id_to_str arc_cpu_nm[] = {
-#ifdef CONFIG_ISA_ARCOMPACT
-	{ 0x20, "ARC 600"   },
-	{ 0x30, "ARC 770"   },  /* 750 identified seperately */
-#else
-	{ 0x40, "ARC EM"  },
-	{ 0x50, "ARC HS38"  },
-	{ 0x54, "ARC HS48"  },
-#endif
-	{ 0x00, "Unknown"   }
+static const struct id_to_str arc_cpu_rel[] = {
+	/* UARCH.MAJOR,	Release */
+	{  0,		"R3.10a"},
+	{  1,		"R3.50a"},
+	{  0xFF,	NULL   }
 };
 
 static void read_decode_ccm_bcr(struct cpuinfo_arc *cpu)
@@ -116,31 +112,72 @@ static void read_decode_ccm_bcr(struct cpuinfo_arc *cpu)
 	}
 }
 
+static void decode_arc_core(struct cpuinfo_arc *cpu)
+{
+	struct bcr_uarch_build_arcv2 uarch;
+	const struct id_to_str *tbl;
+
+	/*
+	 * Up until (including) the first core4 release (0x54) things were
+	 * simple: AUX IDENTITY.ARCVER was sufficient to identify arc family
+	 * and release: 0x50 to 0x53 was HS38, 0x54 was HS48 (dual issue)
+	 */
+
+	if (cpu->core.family < 0x54) { /* includes arc700 */
+
+		for (tbl = &arc_legacy_rel[0]; tbl->id != 0; tbl++) {
+			if (cpu->core.family == tbl->id) {
+				cpu->release = tbl->str;
+				break;
+			}
+		}
+
+		if (is_isa_arcompact())
+			cpu->name = "ARC700";
+		else if (tbl->str)
+			cpu->name = "HS38";
+		else
+			cpu->name = cpu->release = "Unknown";
+
+		return;
+	}
+
+	/*
+	 * However the subsequent HS release (same 0x54) allow HS38 or HS48
+	 * configurations and encode this info in a different BCR.
+	 * The BCR was introduced in 0x54 so can't be read unconditionally.
+	 */
+
+	READ_BCR(ARC_REG_MICRO_ARCH_BCR, uarch);
+
+	if (uarch.prod == 4) {
+		cpu->name = "HS48";
+		cpu->extn.dual = 1;
+
+	} else {
+		cpu->name = "HS38";
+	}
+
+	for (tbl = &arc_cpu_rel[0]; tbl->id != 0xFF; tbl++) {
+		if (uarch.maj == tbl->id) {
+			cpu->release = tbl->str;
+			break;
+		}
+	}
+}
+
 static void read_arc_build_cfg_regs(void)
 {
 	struct bcr_timer timer;
 	struct bcr_generic bcr;
 	struct cpuinfo_arc *cpu = &cpuinfo_arc700[smp_processor_id()];
-	const struct id_to_str *tbl;
 	struct bcr_isa_arcv2 isa;
 	struct bcr_actionpoint ap;
 
 	FIX_PTR(cpu);
 
 	READ_BCR(AUX_IDENTITY, cpu->core);
-
-	for (tbl = &arc_cpu_rel[0]; tbl->id != 0; tbl++) {
-		if (cpu->core.family == tbl->id) {
-			cpu->details = tbl->str;
-			break;
-		}
-	}
-
-	for (tbl = &arc_cpu_nm[0]; tbl->id != 0; tbl++) {
-		if ((cpu->core.family & 0xF4) == tbl->id)
-			break;
-	}
-	cpu->name = tbl->str;
+	decode_arc_core(cpu);
 
 	READ_BCR(ARC_REG_TIMERS_BCR, timer);
 	cpu->extn.timer0 = timer.t0;
@@ -151,16 +188,6 @@ static void read_arc_build_cfg_regs(void)
 
 	READ_BCR(ARC_REG_MUL_BCR, cpu->extn_mpy);
 
-	cpu->extn.norm = read_aux_reg(ARC_REG_NORM_BCR) > 1 ? 1 : 0; /* 2,3 */
-	cpu->extn.barrel = read_aux_reg(ARC_REG_BARREL_BCR) > 1 ? 1 : 0; /* 2,3 */
-	cpu->extn.swap = read_aux_reg(ARC_REG_SWAP_BCR) ? 1 : 0;        /* 1,3 */
-	cpu->extn.crc = read_aux_reg(ARC_REG_CRC_BCR) ? 1 : 0;
-	cpu->extn.minmax = read_aux_reg(ARC_REG_MIXMAX_BCR) > 1 ? 1 : 0; /* 2 */
-	cpu->extn.swape = (cpu->core.family >= 0x34) ? 1 :
-				IS_ENABLED(CONFIG_ARC_HAS_SWAPE);
-
-	READ_BCR(ARC_REG_XY_MEM_BCR, cpu->extn_xymem);
-
 	/* Read CCM BCRs for boot reporting even if not enabled in Kconfig */
 	read_decode_ccm_bcr(cpu);
 
@@ -198,30 +225,12 @@ static void read_arc_build_cfg_regs(void)
 		cpu->bpu.num_pred = 2048 << bpu.pte;
 		cpu->bpu.ret_stk = 4 << bpu.rse;
 
-		if (cpu->core.family >= 0x54) {
-
-			struct bcr_uarch_build_arcv2 uarch;
-
-			/*
-			 * The first 0x54 core (uarch maj:min 0:1 or 0:2) was
-			 * dual issue only (HS4x). But next uarch rev (1:0)
-			 * allows it be configured for single issue (HS3x)
-			 * Ensure we fiddle with dual issue only on HS4x
-			 */
-			READ_BCR(ARC_REG_MICRO_ARCH_BCR, uarch);
-
-			if (uarch.prod == 4) {
-				unsigned int exec_ctrl;
-
-				/* dual issue hardware always present */
-				cpu->extn.dual = 1;
-
-				READ_BCR(AUX_EXEC_CTRL, exec_ctrl);
+		/* if dual issue hardware, is it enabled ? */
+		if (cpu->extn.dual) {
+			unsigned int exec_ctrl;
 
-				/* dual issue hardware enabled ? */
-				cpu->extn.dual_enb = !(exec_ctrl & 1);
-
-			}
+			READ_BCR(AUX_EXEC_CTRL, exec_ctrl);
+			cpu->extn.dual_enb = !(exec_ctrl & 1);
 		}
 	}
 
@@ -263,7 +272,8 @@ static char *arc_cpu_mumbojumbo(int cpu_id, char *buf, int len)
 {
 	struct cpuinfo_arc *cpu = &cpuinfo_arc700[cpu_id];
 	struct bcr_identity *core = &cpu->core;
-	int i, n = 0, ua = 0;
+	char mpy_opt[16];
+	int n = 0;
 
 	FIX_PTR(cpu);
 
@@ -272,7 +282,7 @@ static char *arc_cpu_mumbojumbo(int cpu_id, char *buf, int len)
 		       core->family, core->cpu_id, core->chip_id);
 
 	n += scnprintf(buf + n, len - n, "processor [%d]\t: %s %s (%s ISA) %s%s%s\n",
-		       cpu_id, cpu->name, cpu->details,
+		       cpu_id, cpu->name, cpu->release,
 		       is_isa_arcompact() ? "ARCompact" : "ARCv2",
 		       IS_AVAIL1(cpu->isa.be, "[Big-Endian]"),
 		       IS_AVAIL3(cpu->extn.dual, cpu->extn.dual_enb, " Dual-Issue "));
@@ -283,61 +293,50 @@ static char *arc_cpu_mumbojumbo(int cpu_id, char *buf, int len)
 		       IS_AVAIL2(cpu->extn.rtc, "RTC [UP 64-bit] ", CONFIG_ARC_TIMERS_64BIT),
 		       IS_AVAIL2(cpu->extn.gfrc, "GFRC [SMP 64-bit] ", CONFIG_ARC_TIMERS_64BIT));
 
-#ifdef __ARC_UNALIGNED__
-	ua = 1;
-#endif
-	n += i = scnprintf(buf + n, len - n, "%s%s%s%s%s%s",
-			   IS_AVAIL2(cpu->isa.atomic, "atomic ", CONFIG_ARC_HAS_LLSC),
-			   IS_AVAIL2(cpu->isa.ldd, "ll64 ", CONFIG_ARC_HAS_LL64),
-			   IS_AVAIL1(cpu->isa.unalign, "unalign "), IS_USED_RUN(ua));
-
-	if (i)
-		n += scnprintf(buf + n, len - n, "\n\t\t: ");
-
 	if (cpu->extn_mpy.ver) {
-		if (cpu->extn_mpy.ver <= 0x2) {	/* ARCompact */
-			n += scnprintf(buf + n, len - n, "mpy ");
+		if (is_isa_arcompact()) {
+			scnprintf(mpy_opt, 16, "mpy");
 		} else {
+
 			int opt = 2;	/* stock MPY/MPYH */
 
 			if (cpu->extn_mpy.dsp)	/* OPT 7-9 */
 				opt = cpu->extn_mpy.dsp + 6;
 
-			n += scnprintf(buf + n, len - n, "mpy[opt %d] ", opt);
+			scnprintf(mpy_opt, 16, "mpy[opt %d] ", opt);
 		}
 	}
 
 	n += scnprintf(buf + n, len - n, "%s%s%s%s%s%s%s%s\n",
-		       IS_AVAIL1(cpu->isa.div_rem, "div_rem "),
-		       IS_AVAIL1(cpu->extn.norm, "norm "),
-		       IS_AVAIL1(cpu->extn.barrel, "barrel-shift "),
-		       IS_AVAIL1(cpu->extn.swap, "swap "),
-		       IS_AVAIL1(cpu->extn.minmax, "minmax "),
-		       IS_AVAIL1(cpu->extn.crc, "crc "),
-		       IS_AVAIL2(cpu->extn.swape, "swape", CONFIG_ARC_HAS_SWAPE));
-
-	if (cpu->bpu.ver)
+		       IS_AVAIL2(cpu->isa.atomic, "atomic ", CONFIG_ARC_HAS_LLSC),
+		       IS_AVAIL2(cpu->isa.ldd, "ll64 ", CONFIG_ARC_HAS_LL64),
+		       IS_AVAIL2(cpu->isa.unalign, "unalign ", CONFIG_ARC_USE_UNALIGNED_MEM_ACCESS),
+		       IS_AVAIL1(cpu->extn_mpy.ver, mpy_opt),
+		       IS_AVAIL1(cpu->isa.div_rem, "div_rem "));
+
+	if (cpu->bpu.ver) {
 		n += scnprintf(buf + n, len - n,
 			      "BPU\t\t: %s%s match, cache:%d, Predict Table:%d Return stk: %d",
 			      IS_AVAIL1(cpu->bpu.full, "full"),
 			      IS_AVAIL1(!cpu->bpu.full, "partial"),
 			      cpu->bpu.num_cache, cpu->bpu.num_pred, cpu->bpu.ret_stk);
 
-	if (is_isa_arcv2()) {
-		struct bcr_lpb lpb;
+		if (is_isa_arcv2()) {
+			struct bcr_lpb lpb;
 
-		READ_BCR(ARC_REG_LPB_BUILD, lpb);
-		if (lpb.ver) {
-			unsigned int ctl;
-			ctl = read_aux_reg(ARC_REG_LPB_CTRL);
+			READ_BCR(ARC_REG_LPB_BUILD, lpb);
+			if (lpb.ver) {
+				unsigned int ctl;
+				ctl = read_aux_reg(ARC_REG_LPB_CTRL);
 
-			n += scnprintf(buf + n, len - n, " Loop Buffer:%d %s",
-				lpb.entries,
-				IS_DISABLED_RUN(!ctl));
+				n += scnprintf(buf + n, len - n, " Loop Buffer:%d %s",
+					       lpb.entries,
+					       IS_DISABLED_RUN(!ctl));
+			}
 		}
+		n += scnprintf(buf + n, len - n, "\n");
 	}
 
-	n += scnprintf(buf + n, len - n, "\n");
 	return buf;
 }
 
@@ -390,11 +389,6 @@ static char *arc_extn_mumbojumbo(int cpu_id, char *buf, int len)
 		}
 	}
 
-	n += scnprintf(buf + n, len - n, "OS ABI [v%d]\t: %s\n",
-			EF_ARC_OSABI_CURRENT >> 8,
-			EF_ARC_OSABI_CURRENT == EF_ARC_OSABI_V3 ?
-			"no-legacy-syscalls" : "64-bit data any register aligned");
-
 	return buf;
 }
 
@@ -497,6 +491,8 @@ static inline bool uboot_arg_invalid(unsigned long addr)
 #define UBOOT_TAG_NONE		0
 #define UBOOT_TAG_CMDLINE	1
 #define UBOOT_TAG_DTB		2
+/* We always pass 0 as magic from U-boot */
+#define UBOOT_MAGIC_VALUE	0
 
 void __init handle_uboot_args(void)
 {
@@ -511,6 +507,11 @@ void __init handle_uboot_args(void)
 		goto ignore_uboot_args;
 	}
 
+	if (uboot_magic != UBOOT_MAGIC_VALUE) {
+		pr_warn(IGNORE_ARGS "non zero uboot magic\n");
+		goto ignore_uboot_args;
+	}
+
 	if (uboot_tag != UBOOT_TAG_NONE &&
             uboot_arg_invalid((unsigned long)uboot_arg)) {
 		pr_warn(IGNORE_ARGS "invalid uboot arg: '%px'\n", uboot_arg);
diff --git a/arch/arc/kernel/troubleshoot.c b/arch/arc/kernel/troubleshoot.c
index 215f515442e0..b0aa8c028331 100644
--- a/arch/arc/kernel/troubleshoot.c
+++ b/arch/arc/kernel/troubleshoot.c
@@ -145,7 +145,8 @@ static void show_ecr_verbose(struct pt_regs *regs)
 	} else if (vec == ECR_V_PROTV) {
 		if (cause_code == ECR_C_PROTV_INST_FETCH)
 			pr_cont("Execute from Non-exec Page\n");
-		else if (cause_code == ECR_C_PROTV_MISALIG_DATA)
+		else if (cause_code == ECR_C_PROTV_MISALIG_DATA &&
+		         IS_ENABLED(CONFIG_ISA_ARCOMPACT))
 			pr_cont("Misaligned r/w from 0x%08lx\n", address);
 		else
 			pr_cont("%s access not allowed on page\n",
@@ -161,6 +162,8 @@ static void show_ecr_verbose(struct pt_regs *regs)
 			pr_cont("Bus Error from Data Mem\n");
 		else
 			pr_cont("Bus Error, check PRM\n");
+	} else if (vec == ECR_V_MISALIGN) {
+		pr_cont("Misaligned r/w from 0x%08lx\n", address);
 #endif
 	} else if (vec == ECR_V_TRAP) {
 		if (regs->ecr_param == 5)
diff --git a/arch/arc/lib/Makefile b/arch/arc/lib/Makefile
index b1656d156097..f7537b466b23 100644
--- a/arch/arc/lib/Makefile
+++ b/arch/arc/lib/Makefile
@@ -8,4 +8,10 @@
 lib-y	:= strchr-700.o strcpy-700.o strlen.o memcmp.o
 
 lib-$(CONFIG_ISA_ARCOMPACT)	+= memcpy-700.o memset.o strcmp.o
-lib-$(CONFIG_ISA_ARCV2)		+= memcpy-archs.o memset-archs.o strcmp-archs.o
+lib-$(CONFIG_ISA_ARCV2)		+= memset-archs.o strcmp-archs.o
+
+ifdef CONFIG_ARC_USE_UNALIGNED_MEM_ACCESS
+lib-$(CONFIG_ISA_ARCV2)		+=memcpy-archs-unaligned.o
+else
+lib-$(CONFIG_ISA_ARCV2)		+=memcpy-archs.o
+endif
diff --git a/arch/arc/lib/memcpy-archs-unaligned.S b/arch/arc/lib/memcpy-archs-unaligned.S
new file mode 100644
index 000000000000..28993a73fdde
--- /dev/null
+++ b/arch/arc/lib/memcpy-archs-unaligned.S
@@ -0,0 +1,47 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * ARCv2 memcpy implementation optimized for unaligned memory access using.
+ *
+ * Copyright (C) 2019 Synopsys
+ * Author: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
+ */
+
+#include <linux/linkage.h>
+
+#ifdef CONFIG_ARC_HAS_LL64
+# define LOADX(DST,RX)		ldd.ab	DST, [RX, 8]
+# define STOREX(SRC,RX)		std.ab	SRC, [RX, 8]
+# define ZOLSHFT		5
+# define ZOLAND			0x1F
+#else
+# define LOADX(DST,RX)		ld.ab	DST, [RX, 4]
+# define STOREX(SRC,RX)		st.ab	SRC, [RX, 4]
+# define ZOLSHFT		4
+# define ZOLAND			0xF
+#endif
+
+ENTRY_CFI(memcpy)
+	mov	r3, r0		; don;t clobber ret val
+
+	lsr.f	lp_count, r2, ZOLSHFT
+	lpnz	@.Lcopy32_64bytes
+	;; LOOP START
+	LOADX	(r6, r1)
+	LOADX	(r8, r1)
+	LOADX	(r10, r1)
+	LOADX	(r4, r1)
+	STOREX	(r6, r3)
+	STOREX	(r8, r3)
+	STOREX	(r10, r3)
+	STOREX	(r4, r3)
+.Lcopy32_64bytes:
+
+	and.f	lp_count, r2, ZOLAND ;Last remaining 31 bytes
+	lpnz	@.Lcopyremainingbytes
+	;; LOOP START
+	ldb.ab	r5, [r1, 1]
+	stb.ab	r5, [r3, 1]
+.Lcopyremainingbytes:
+
+	j	[blink]
+END_CFI(memcpy)
diff --git a/arch/arc/plat-eznps/Kconfig b/arch/arc/plat-eznps/Kconfig
index 8eff057efcae..2eaecfb063a7 100644
--- a/arch/arc/plat-eznps/Kconfig
+++ b/arch/arc/plat-eznps/Kconfig
@@ -26,8 +26,8 @@ config EZNPS_MTM_EXT
 	help
 	  Here we add new hierarchy for CPUs topology.
 	  We got:
-		Core
-		Thread
+	    Core
+	    Thread
 	  At the new thread level each CPU represent one HW thread.
 	  At highest hierarchy each core contain 16 threads,
 	  any of them seem like CPU from Linux point of view.
@@ -35,10 +35,10 @@ config EZNPS_MTM_EXT
 	  core and HW scheduler round robin between them.
 
 config EZNPS_MEM_ERROR_ALIGN
-       bool "ARC-EZchip Memory error as an exception"
-       depends on EZNPS_MTM_EXT
-       default n
-       help
+	bool "ARC-EZchip Memory error as an exception"
+	depends on EZNPS_MTM_EXT
+	default n
+	help
 	  On the real chip of the NPS, user memory errors are handled
 	  as a machine check exception, which is fatal, whereas on
 	  simulator platform for NPS, is handled as a Level 2 interrupt