resolve conflict

40 files changed, 593472 insertions, 853 deletions

diff --git a/target/arm/kernel/cubox-i b/target/arm/kernel/cubox-i
index 4283d564b..9843ee37e 100644
--- a/target/arm/kernel/cubox-i
+++ b/target/arm/kernel/cubox-i
@@ -6,9 +6,6 @@ CONFIG_ARCH_MX6=y
 CONFIG_SOC_IMX6Q=y
 CONFIG_SOC_IMX6SL=y
 CONFIG_KUSER_HELPERS=y
-CONFIG_PREEMPT=y
-CONFIG_TREE_PREEMPT_RCU=y
-CONFIG_PREEMPT_RCU=y
 CONFIG_AEABI=y
 CONFIG_VFP=y
 CONFIG_VFPv3=y
diff --git a/target/config/Config.in b/target/config/Config.in
index 9d8a36b49..c50fbd289 100644
--- a/target/config/Config.in
+++ b/target/config/Config.in
@@ -620,6 +620,7 @@ config ADK_TARGET_CMDLINE
 	default "console=ttyS0,115200 console=tty0" if ADK_TARGET_SYSTEM_IBM_X40
 	default "console=ttyS0,115200 console=tty0" if ADK_TARGET_SYSTEM_INTEL_ATOM
 	default "console=ttyS0,115200 console=tty0" if ADK_TARGET_SYSTEM_QEMU_I686
+	default "console=ttyS0,115200 console=tty0" if ADK_TARGET_SYSTEM_QEMU_X86_64
 	default "console=ttyS0,115200 console=tty0" if ADK_TARGET_SYSTEM_QEMU_SPARC64
 	default "console=ttyS0,9600 console=tty0" if ADK_TARGET_SYSTEM_QEMU_PPC
 	default "console=hvc0 console=tty0" if ADK_TARGET_SYSTEM_QEMU_PPC64
diff --git a/target/config/Config.in.runtime b/target/config/Config.in.runtime
index 03cecfca1..7848a25ce 100644
--- a/target/config/Config.in.runtime
+++ b/target/config/Config.in.runtime
@@ -38,8 +38,8 @@ config ADK_RUNTIME_TIMEZONE
 
 choice
 prompt "Console output on embedded system"
-default ADK_RUNTIME_CONSOLE_BOTH if ADK_TARGET_WITH_VGA && !ADK_TARGET_SYSTEM_RASPBERRY_PI && !ADK_TARGET_SYSTEM_QEMU_SH4 && !ADK_TARGET_SYSTEM_QEMU_SH4EB && !ADK_TARGET_SYSTEM_LEMOTE_YEELONG && ADK_TARGET_QEMU_WITH_GRAPHIC
-default ADK_RUNTIME_CONSOLE_VGA if ADK_TARGET_SYSTEM_RASPBERRY_PI || ADK_TARGET_SYSTEM_QEMU_SH4 || ADK_TARGET_SYSTEM_QEMU_SH4EB || ADK_TARGET_SYSTEM_LEMOTE_YEELONG
+default ADK_RUNTIME_CONSOLE_BOTH if ADK_TARGET_WITH_VGA || ADK_TARGET_QEMU_WITH_GRAPHIC && !ADK_TARGET_SYSTEM_RASPBERRY_PI && !ADK_TARGET_SYSTEM_LEMOTE_YEELONG
+default ADK_RUNTIME_CONSOLE_VGA if ADK_TARGET_SYSTEM_RASPBERRY_PI || ADK_TARGET_SYSTEM_LEMOTE_YEELONG
 default ADK_RUNTIME_CONSOLE_SERIAL
 
 config ADK_RUNTIME_CONSOLE_VGA
@@ -77,7 +77,7 @@ prompt "Initial login shell for the root user"
 default ADK_ROOTSH_MKSH
 
 config ADK_ROOTSH_MKSH
-	select ADK_PACKAGE_MKSH
+	select ADK_PACKAGE_MKSH if !ADK_TOOLCHAIN_ONLY
 	bool "mksh (MirBSD Korn Shell)"
 	help
 	  Use mksh (a Korn Shell variant) as standard login shell
@@ -97,13 +97,6 @@ config ADK_ROOTSH_BASH
 	help
 	  Use GNU bash as standard login shell for the superuser.
 
-config ADK_ROOTSH_MKSH
-	select ADK_PACKAGE_MKSH
-	bool "mksh (MirBSD Korn Shell)"
-	help
-	  Use mksh (a Korn Shell variant) as standard login shell
-	  for the superuser.
-
 config ADK_ROOTSH_TCSH
 	select ADK_PACKAGE_TCSH
 	bool "tcsh (Tenex C Shell)"
@@ -124,7 +117,7 @@ prompt "System /bin/sh (POSIX script shell)"
 default ADK_BINSH_MKSH
 
 config ADK_BINSH_MKSH
-	select ADK_PACKAGE_MKSH
+	select ADK_PACKAGE_MKSH if !ADK_TOOLCHAIN_ONLY
 	bool "mksh (MirBSD Korn Shell)"
 	help
 	  Use mksh (a Korn Shell variant) as system shell, which is
diff --git a/target/linux/config/Config.in.audio b/target/linux/config/Config.in.audio
index 76c353f0c..c466bed45 100644
--- a/target/linux/config/Config.in.audio
+++ b/target/linux/config/Config.in.audio
@@ -7,9 +7,6 @@ config ADK_KERNEL_SND_ARM
 config ADK_KERNEL_SND_USB
 	boolean
 
-config ADK_KERNEL_SND_SOC
-	boolean
-
 config ADK_KERNEL_SND_PXA2XX_AC97
 	boolean
 
@@ -105,6 +102,10 @@ config ADK_KPACKAGE_KMOD_SND_CS5535AUDIO
 	help
 	 ALSA AMD CS5535 driver
 
+config ADK_KPACKAGE_KMOD_SND_SOC
+	tristate
+	default n
+
 config ADK_KERNEL_SND_PXA2XX_SOC
 	tristate
 	default n
@@ -113,10 +114,10 @@ config ADK_KPACKAGE_KMOD_SND_PXA2XX_SOC_SPITZ
 	prompt "kmod-snd-pxa2xx-soc-spitz..... ALSA SOC Sharp Zaurus"
 	tristate
 	select ADK_KERNEL_SND_ARM
-	select ADK_KERNEL_SND_SOC
 	select ADK_KERNEL_SND_PXA2XX_AC97
-	select ADK_KPACKAGE_KMOD_SND_AC97_CODEC
 	select ADK_KPACKAGE_KMOD_SND
+	select ADK_KPACKAGE_KMOD_SND_AC97_CODEC
+	select ADK_KPACKAGE_KMOD_SND_SOC
 	select ADK_KERNEL_SND_PXA2XX_SOC
 	depends on ADK_TARGET_SYSTEM_SHARP_ZAURUS
 	default y if ADK_TARGET_SYSTEM_SHARP_ZAURUS
@@ -131,4 +132,26 @@ config ADK_KPACKAGE_KMOD_SND_BCM2835
 	default y if ADK_TARGET_SYSTEM_RASPBERRY_PI
 	default n
 
+config ADK_KPACKAGE_KMOD_SND_BCM2708_SOC_I2S
+	prompt "kmod-snd-bcm2708-soc-i2s........ ALSA SOC I2S Raspberry PI"
+	select ADK_KPACKAGE_KMOD_SND
+	select ADK_KERNEL_SND_ARM
+	select ADK_KPACKAGE_KMOD_SND_SOC
+	boolean
+	default n
+
+config ADK_KPACKAGE_KMOD_SND_BCM2708_SOC_HIFIBERRY_DAC
+	prompt "kmod-snd-bcm2708-hifiberry-dac.... ALSA for Raspberry PI with hifiberry DAC"
+	tristate
+	select ADK_KPACKAGE_KMOD_SND_BCM2708_SOC_I2S
+	depends on ADK_TARGET_SYSTEM_RASPBERRY_PI
+	default n
+
+config ADK_KPACKAGE_KMOD_SND_BCM2708_SOC_HIFIBERRY_DIGI
+	prompt "kmod-snd-bcm2708-hifiberry-digi... ALSA for Raspberry PI with hifiberry DIGI"
+	tristate
+	select ADK_KPACKAGE_KMOD_SND_BCM2708_SOC_I2S
+	depends on ADK_TARGET_SYSTEM_RASPBERRY_PI
+	default n
+
 endmenu
diff --git a/target/linux/config/Config.in.cpu b/target/linux/config/Config.in.cpu
index efaf3a658..a8dfd5188 100644
--- a/target/linux/config/Config.in.cpu
+++ b/target/linux/config/Config.in.cpu
@@ -39,6 +39,14 @@ config ADK_KERNEL_CPU_FREQ
 	boolean
 	default n
 
+config ADK_KERNEL_REGULATOR
+	boolean
+	default n
+
+config ADK_KERNEL_REGULATOR_ANATOP
+	boolean
+	default n
+
 config ADK_KERNEL_CPU_FREQ_GOV_PERFORMANCE
 	boolean
 	default n
@@ -59,15 +67,25 @@ config ADK_KERNEL_CPU_FREQ_GOV_CONSERVATIVE
 	boolean
 	default n
 
+config ADK_KERNEL_ARM_IMX6_CPUFREQ
+	prompt "CPU frequency support for cubox-i"
+	boolean
+	select ADK_KERNEL_CPU_FREQ
+	select ADK_KERNEL_REGULATOR
+	select ADK_KERNEL_REGULATOR_ANATOP
+	default y if ADK_TARGET_SYSTEM_CUBOX_I
+	depends on ADK_TARGET_SYSTEM_CUBOX_I
+
 config ADK_KERNEL_ARM_BCM2835_CPUFREQ
-	prompt "CPU frequency support"
+	prompt "CPU frequency support for raspberry-pi"
 	boolean
 	select ADK_KERNEL_CPU_FREQ
 	default y if ADK_TARGET_SYSTEM_RASPBERRY_PI
+	depends on ADK_TARGET_SYSTEM_RASPBERRY_PI
 
 choice
 prompt "Governor"
-depends on ADK_KERNEL_ARM_BCM2835_CPUFREQ
+depends on ADK_KERNEL_ARM_BCM2835_CPUFREQ || ADK_KERNEL_ARM_IMX6_CPUFREQ
 
 config ADK_KERNEL_CPU_FREQ_DEFAULT_GOV_ONDEMAND
 	boolean "ondemand"
diff --git a/target/linux/config/Config.in.debug b/target/linux/config/Config.in.debug
index 6236b329b..46942160f 100644
--- a/target/linux/config/Config.in.debug
+++ b/target/linux/config/Config.in.debug
@@ -25,6 +25,34 @@ config ADK_QUIET_KERNEL
 	help
 	  Make bootup quiet without messages from the kernel.
 
+config ADK_KERNEL_EARLY_PRINTK
+	boolean
+	default n
+
+config ADK_KERNEL_PRINTK
+	prompt "Enable printk to save space and quieten bootup"
+	boolean
+	select ADK_KERNEL_EARLY_PRINTK
+	default y
+	help
+	  Disable printk to save space and quieten bootup.
+
+config ADK_KERNEL_PRINTK_TIME
+	prompt "Enable timing information for printk"
+	boolean
+	depends on ADK_KERNEL_PRINTK
+	default n
+	help
+	  Enable timing information for printk, to analyze kernel
+	  bootup performance.
+
+config ADK_KERNEL_BUG
+	prompt "Enable BUGS() in the kernel"
+	boolean
+	default n
+	help
+	  Enable if you need BUGS() in the kernel.
+
 config ADK_KERNEL_NETCONSOLE
 	prompt "Netconsole"
 	boolean
diff --git a/target/linux/config/Config.in.netfilter.ip4 b/target/linux/config/Config.in.netfilter.ip4
index cf33c02a2..b43a566b9 100644
--- a/target/linux/config/Config.in.netfilter.ip4
+++ b/target/linux/config/Config.in.netfilter.ip4
@@ -37,9 +37,10 @@ config ADK_KPACKAGE_KMOD_IP_NF_FILTER
 config ADK_KPACKAGE_KMOD_FULL_NAT
 	tristate "Meta package for Full NAT"
 	select ADK_KPACKAGE_KMOD_NF_NAT if ADK_KERNEL_VERSION_3_4_82
+	select ADK_KPACKAGE_KMOD_NF_NAT_IPV4 if ADK_KERNEL_VERSION_3_10_30
 	select ADK_KPACKAGE_KMOD_NF_NAT_IPV4 if ADK_KERNEL_VERSION_3_11_10
-	select ADK_KPACKAGE_KMOD_NF_NAT_IPV4 if ADK_KERNEL_VERSION_3_12_11
-	select ADK_KPACKAGE_KMOD_NF_NAT_IPV4 if ADK_KERNEL_VERSION_3_13_5
+	select ADK_KPACKAGE_KMOD_NF_NAT_IPV4 if ADK_KERNEL_VERSION_3_12_13
+	select ADK_KPACKAGE_KMOD_NF_NAT_IPV4 if ADK_KERNEL_VERSION_3_13_6
 
 config ADK_KPACKAGE_KMOD_NF_NAT
 	tristate 'Full NAT'
@@ -53,8 +54,10 @@ config ADK_KPACKAGE_KMOD_NF_NAT
 config ADK_KPACKAGE_KMOD_NF_NAT_IPV4
 	tristate 'Full NAT'
 	depends on ADK_KPACKAGE_KMOD_IP_NF_IPTABLES
-	depends on ADK_KERNEL_VERSION_3_11_10 || ADK_KERNEL_VERSION_3_12_11 \
-		|| ADK_KERNEL_VERSION_3_13_5
+	depends on ADK_KERNEL_VERSION_3_10_30 \
+		|| ADK_KERNEL_VERSION_3_11_10 \
+		|| ADK_KERNEL_VERSION_3_12_13 \
+		|| ADK_KERNEL_VERSION_3_13_6
 	help
 	  The Full NAT option allows masquerading, port forwarding and other
 	  forms of full Network Address Port Translation.  It is controlled by
diff --git a/target/linux/config/Config.in.pm b/target/linux/config/Config.in.pm
index deff5b3f6..4bfe42c58 100644
--- a/target/linux/config/Config.in.pm
+++ b/target/linux/config/Config.in.pm
@@ -1,5 +1,6 @@
-config ADK_KERNEL_PM
+config ADK_KERNEL_PM_RUNTIME
 	boolean
+	default y if ADK_TARGET_SYSTEM_CUBOX_I
 
 config ADK_KERNEL_ACPI
 	boolean
@@ -28,7 +29,7 @@ depends on ADK_TARGET_WITH_ACPI || ADK_TARGET_SYSTEM_LEMOTE_YEELONG
 config ADK_HARDWARE_ACPI
 	prompt "Enable ACPI support"
 	boolean
-	select ADK_KERNEL_PM
+	select ADK_KERNEL_PM_RUNTIME
 	select ADK_KERNEL_ACPI
 	select ADK_KERNEL_ACPI_SYSFS_POWER
 	select ADK_KERNEL_ACPI_AC
@@ -44,7 +45,7 @@ config ADK_HARDWARE_ACPI
 config ADK_KERNEL_SUSPEND
 	prompt "Enable Suspend-to-RAM support"
 	boolean
-	select ADK_KERNEL_PM
+	select ADK_KERNEL_PM_RUNTIME
 	default y if ADK_TARGET_SYSTEM_IBM_X40
 	default y if ADK_TARGET_SYSTEM_LEMOTE_YEELONG
 	default n
@@ -54,7 +55,7 @@ config ADK_KERNEL_SUSPEND
 config ADK_KERNEL_HIBERNATION
 	prompt "Enable Suspend-to-Disk support"
 	boolean
-	select ADK_KERNEL_PM
+	select ADK_KERNEL_PM_RUNTIME
 	select ADK_KERNEL_SWAP
 	select BUSYBOX_SWAPONOFF
 	default y if ADK_TARGET_SYSTEM_IBM_X40
diff --git a/target/linux/kernel.config b/target/linux/kernel.config
index 26205a842..a28c2088b 100644
--- a/target/linux/kernel.config
+++ b/target/linux/kernel.config
@@ -7,6 +7,7 @@ CONFIG_SYSVIPC=y
 CONFIG_SYSVIPC_SYSCTL=y
 CONFIG_POSIX_MQUEUE=y
 CONFIG_POSIX_MQUEUE_SYSCTL=y
+CONFIG_SLOB=y
 CONFIG_NET=y
 CONFIG_PACKET=y
 CONFIG_UNIX=y
@@ -27,8 +28,6 @@ CONFIG_BINFMT_SCRIPT=y
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_STANDALONE=y
-CONFIG_PRINTK=y
-CONFIG_BUG=n
 CONFIG_FUTEX=y
 CONFIG_EPOLL=y
 CONFIG_SIGNALFD=y
@@ -39,5 +38,3 @@ CONFIG_AIO=y
 CONFIG_PCI_QUIRKS=y
 CONFIG_TTY=y
 CONFIG_UNIX98_PTYS=y
-CONFIG_PRINTK_TIME=y
-CONFIG_EARLY_PRINTK=y
diff --git a/target/linux/patches/3.13.5/bsd-compatibility.patch b/target/linux/patches/3.10.30/bsd-compatibility.patch
index b954b658f..b954b658f 100644
--- a/target/linux/patches/3.13.5/bsd-compatibility.patch
+++ b/target/linux/patches/3.10.30/bsd-compatibility.patch
diff --git a/target/linux/patches/3.10.30/solidrun-cubox-i.patch b/target/linux/patches/3.10.30/solidrun-cubox-i.patch
new file mode 100644
index 000000000..beaa71b4e
--- /dev/null
+++ b/target/linux/patches/3.10.30/solidrun-cubox-i.patch
@@ -0,0 +1,584365 @@
+diff -Nur linux-3.10.30/Documentation/ABI/testing/sysfs-class-mtd linux-3.10.30-cubox-i/Documentation/ABI/testing/sysfs-class-mtd
+--- linux-3.10.30/Documentation/ABI/testing/sysfs-class-mtd	2014-02-13 22:48:15.000000000 +0100
++++ linux-3.10.30-cubox-i/Documentation/ABI/testing/sysfs-class-mtd	2014-03-08 20:32:51.000000000 +0100
+@@ -104,7 +104,7 @@
+ 		One of the following ASCII strings, representing the device
+ 		type:
+ 
+-		absent, ram, rom, nor, nand, dataflash, ubi, unknown
++		absent, ram, rom, nor, nand, mlc-nand, dataflash, ubi, unknown
+ 
+ What:		/sys/class/mtd/mtdX/writesize
+ Date:		April 2009
+@@ -128,9 +128,8 @@
+ Contact:	linux-mtd@lists.infradead.org
+ Description:
+ 		Maximum number of bit errors that the device is capable of
+-		correcting within each region covering an ecc step.  This will
+-		always be a non-negative integer.  Note that some devices will
+-		have multiple ecc steps within each writesize region.
++		correcting within each region covering an ECC step (see
++		ecc_step_size).  This will always be a non-negative integer.
+ 
+ 		In the case of devices lacking any ECC capability, it is 0.
+ 
+@@ -173,3 +172,15 @@
+ 		This is generally applicable only to NAND flash devices with ECC
+ 		capability.  It is ignored on devices lacking ECC capability;
+ 		i.e., devices for which ecc_strength is zero.
++
++What:		/sys/class/mtd/mtdX/ecc_step_size
++Date:		May 2013
++KernelVersion:	3.10
++Contact:	linux-mtd@lists.infradead.org
++Description:
++		The size of a single region covered by ECC, known as the ECC
++		step.  Devices may have several equally sized ECC steps within
++		each writesize region.
++
++		It will always be a non-negative integer.  In the case of
++		devices lacking any ECC capability, it is 0.
+diff -Nur linux-3.10.30/Documentation/DocBook/mtdnand.tmpl linux-3.10.30-cubox-i/Documentation/DocBook/mtdnand.tmpl
+--- linux-3.10.30/Documentation/DocBook/mtdnand.tmpl	2014-02-13 22:48:15.000000000 +0100
++++ linux-3.10.30-cubox-i/Documentation/DocBook/mtdnand.tmpl	2014-03-08 20:32:51.000000000 +0100
+@@ -1222,10 +1222,6 @@
+ #define NAND_BBT_VERSION	0x00000100
+ /* Create a bbt if none axists */
+ #define NAND_BBT_CREATE		0x00000200
+-/* Search good / bad pattern through all pages of a block */
+-#define NAND_BBT_SCANALLPAGES	0x00000400
+-/* Scan block empty during good / bad block scan */
+-#define NAND_BBT_SCANEMPTY	0x00000800
+ /* Write bbt if neccecary */
+ #define NAND_BBT_WRITE		0x00001000
+ /* Read and write back block contents when writing bbt */
+diff -Nur linux-3.10.30/Documentation/arm/small_task_packing.txt linux-3.10.30-cubox-i/Documentation/arm/small_task_packing.txt
+--- linux-3.10.30/Documentation/arm/small_task_packing.txt	1970-01-01 01:00:00.000000000 +0100
++++ linux-3.10.30-cubox-i/Documentation/arm/small_task_packing.txt	2014-03-08 20:32:51.000000000 +0100
+@@ -0,0 +1,136 @@
++Small Task Packing in the big.LITTLE MP Reference Patch Set
++
++What is small task packing?
++----
++Simply that the scheduler will fit as many small tasks on a single CPU
++as possible before using other CPUs. A small task is defined as one
++whose tracked load is less than 90% of a NICE_0 task. This is a change
++from the usual behavior since the scheduler will normally use an idle
++CPU for a waking task unless that task is considered cache hot.
++
++
++How is it implemented?
++----
++Since all small tasks must wake up relatively frequently, the main
++requirement for packing small tasks is to select a partly-busy CPU when
++waking rather than looking for an idle CPU. We use the tracked load of
++the CPU runqueue to determine how heavily loaded each CPU is and the
++tracked load of the task to determine if it will fit on the CPU. We
++always start with the lowest-numbered CPU in a sched domain and stop
++looking when we find a CPU with enough space for the task.
++
++Some further tweaks are necessary to suppress load balancing when the
++CPU is not fully loaded, otherwise the scheduler attempts to spread
++tasks evenly across the domain.
++
++
++How does it interact with the HMP patches?
++----
++Firstly, we only enable packing on the little domain. The intent is that
++the big domain is intended to spread tasks amongst the available CPUs
++one-task-per-CPU. The little domain however is attempting to use as
++little power as possible while servicing its tasks.
++
++Secondly, since we offload big tasks onto little CPUs in order to try
++to devote one CPU to each task, we have a threshold above which we do
++not try to pack a task and instead will select an idle CPU if possible.
++This maintains maximum forward progress for busy tasks temporarily
++demoted from big CPUs.
++
++
++Can the behaviour be tuned?
++----
++Yes, the load level of a 'full' CPU can be easily modified in the source
++and is exposed through sysfs as /sys/kernel/hmp/packing_limit to be
++changed at runtime. The presence of the packing behaviour is controlled
++by CONFIG_SCHED_HMP_LITTLE_PACKING and can be disabled at run-time
++using /sys/kernel/hmp/packing_enable.
++The definition of a small task is hard coded as 90% of NICE_0_LOAD
++and cannot be modified at run time.
++
++
++Why do I need to tune it?
++----
++The optimal configuration is likely to be different depending upon the
++design and manufacturing of your SoC.
++
++In the main, there are two system effects from enabling small task
++packing.
++
++1. CPU operating point may increase
++2. wakeup latency of tasks may be increased
++
++There are also likely to be secondary effects from loading one CPU
++rather than spreading tasks.
++
++Note that all of these system effects are dependent upon the workload
++under consideration.
++
++
++CPU Operating Point
++----
++The primary impact of loading one CPU with a number of light tasks is to
++increase the compute requirement of that CPU since it is no longer idle
++as often. Increased compute requirement causes an increase in the
++frequency of the CPU through CPUfreq.
++
++Consider this example:
++We have a system with 3 CPUs which can operate at any frequency between
++350MHz and 1GHz. The system has 6 tasks which would each produce 10%
++load at 1GHz. The scheduler has frequency-invariant load scaling
++enabled. Our DVFS governor aims for 80% utilization at the chosen
++frequency.
++
++Without task packing, these tasks will be spread out amongst all CPUs
++such that each has 2. This will produce roughly 20% system load, and
++the frequency of the package will remain at 350MHz.
++
++With task packing set to the default packing_limit, all of these tasks
++will sit on one CPU and require a package frequency of ~750MHz to reach
++80% utilization. (0.75 = 0.6 * 0.8).
++
++When a package operates on a single frequency domain, all CPUs in that
++package share frequency and voltage.
++
++Depending upon the SoC implementation there can be a significant amount
++of energy lost to leakage from idle CPUs. The decision about how
++loaded a CPU must be to be considered 'full' is therefore controllable
++through sysfs (sys/kernel/hmp/packing_limit) and directly in the code.
++
++Continuing the example, lets set packing_limit to 450 which means we
++will pack tasks until the total load of all running tasks >= 450. In
++practise, this is very similar to a 55% idle 1Ghz CPU.
++
++Now we are only able to place 4 tasks on CPU0, and two will overflow
++onto CPU1. CPU0 will have a load of 40% and CPU1 will have a load of
++20%. In order to still hit 80% utilization, CPU0 now only needs to
++operate at (0.4*0.8=0.32) 320MHz, which means that the lowest operating
++point will be selected, the same as in the non-packing case, except that
++now CPU2 is no longer needed and can be power-gated.
++
++In order to use less energy, the saving from power-gating CPU2 must be
++more than the energy spent running CPU0 for the extra cycles. This
++depends upon the SoC implementation.
++
++This is obviously a contrived example requiring all the tasks to
++be runnable at the same time, but it illustrates the point.
++
++
++Wakeup Latency
++----
++This is an unavoidable consequence of trying to pack tasks together
++rather than giving them a CPU each. If you cannot find an acceptable
++level of wakeup latency, you should turn packing off.
++
++Cyclictest is a good test application for determining the added latency
++when configuring packing.
++
++
++Why is it turned off for the VersatileExpress V2P_CA15A7 CoreTile?
++----
++Simply, this core tile only has power gating for the whole A7 package.
++When small task packing is enabled, all our low-energy use cases
++normally fit onto one A7 CPU. We therefore end up with 2 mostly-idle
++CPUs and one mostly-busy CPU. This decreases the amount of time
++available where the whole package is idle and can be turned off.
++
+diff -Nur linux-3.10.30/Documentation/devicetree/bindings/arm/cci.txt linux-3.10.30-cubox-i/Documentation/devicetree/bindings/arm/cci.txt
+--- linux-3.10.30/Documentation/devicetree/bindings/arm/cci.txt	1970-01-01 01:00:00.000000000 +0100
++++ linux-3.10.30-cubox-i/Documentation/devicetree/bindings/arm/cci.txt	2014-03-08 20:32:51.000000000 +0100
+@@ -0,0 +1,172 @@
++=======================================================
++ARM CCI cache coherent interconnect binding description
++=======================================================
++
++ARM multi-cluster systems maintain intra-cluster coherency through a
++cache coherent interconnect (CCI) that is capable of monitoring bus
++transactions and manage coherency, TLB invalidations and memory barriers.
++
++It allows snooping and distributed virtual memory message broadcast across
++clusters, through memory mapped interface, with a global control register
++space and multiple sets of interface control registers, one per slave
++interface.
++
++Bindings for the CCI node follow the ePAPR standard, available from:
++
++www.power.org/documentation/epapr-version-1-1/
++
++with the addition of the bindings described in this document which are
++specific to ARM.
++
++* CCI interconnect node
++
++	Description: Describes a CCI cache coherent Interconnect component
++
++	Node name must be "cci".
++	Node's parent must be the root node /, and the address space visible
++	through the CCI interconnect is the same as the one seen from the
++	root node (ie from CPUs perspective as per DT standard).
++	Every CCI node has to define the following properties:
++
++	- compatible
++		Usage: required
++		Value type: <string>
++		Definition: must be set to
++			    "arm,cci-400"
++
++	- reg
++		Usage: required
++		Value type: <prop-encoded-array>
++		Definition: A standard property. Specifies base physical
++			    address of CCI control registers common to all
++			    interfaces.
++
++	- ranges:
++		Usage: required
++		Value type: <prop-encoded-array>
++		Definition: A standard property. Follow rules in the ePAPR for
++			    hierarchical bus addressing. CCI interfaces
++			    addresses refer to the parent node addressing
++			    scheme to declare their register bases.
++
++	CCI interconnect node can define the following child nodes:
++
++	- CCI control interface nodes
++
++		Node name must be "slave-if".
++		Parent node must be CCI interconnect node.
++
++		A CCI control interface node must contain the following
++		properties:
++
++		- compatible
++			Usage: required
++			Value type: <string>
++			Definition: must be set to
++				    "arm,cci-400-ctrl-if"
++
++		- interface-type:
++			Usage: required
++			Value type: <string>
++			Definition: must be set to one of {"ace", "ace-lite"}
++				    depending on the interface type the node
++				    represents.
++
++		- reg:
++			Usage: required
++			Value type: <prop-encoded-array>
++			Definition: the base address and size of the
++				    corresponding interface programming
++				    registers.
++
++* CCI interconnect bus masters
++
++	Description: masters in the device tree connected to a CCI port
++		     (inclusive of CPUs and their cpu nodes).
++
++	A CCI interconnect bus master node must contain the following
++	properties:
++
++	- cci-control-port:
++		Usage: required
++		Value type: <phandle>
++		Definition: a phandle containing the CCI control interface node
++			    the master is connected to.
++
++Example:
++
++	cpus {
++		#size-cells = <0>;
++		#address-cells = <1>;
++
++		CPU0: cpu@0 {
++			device_type = "cpu";
++			compatible = "arm,cortex-a15";
++			cci-control-port = <&cci_control1>;
++			reg = <0x0>;
++		};
++
++		CPU1: cpu@1 {
++			device_type = "cpu";
++			compatible = "arm,cortex-a15";
++			cci-control-port = <&cci_control1>;
++			reg = <0x1>;
++		};
++
++		CPU2: cpu@100 {