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Commit 4073723a authored by Russell King's avatar Russell King
Browse files

Merge branch 'misc' into devel 

Conflicts:
	arch/arm/Kconfig
	arch/arm/common/Makefile
	arch/arm/kernel/Makefile
	arch/arm/kernel/smp.c
parents 58daf18c 4ec3eb13

Documentation/arm/00-INDEX

+2 −0
Original line number Diff line number Diff line
@@ -34,3 +34,5 @@ memory.txt 
	- description of the virtual memory layout

nwfpe/

	- NWFPE floating point emulator documentation

swp_emulation

	- SWP/SWPB emulation handler/logging description

Documentation/arm/swp_emulation

0 → 100644
+27 −0
Original line number Diff line number Diff line 
Software emulation of deprecated SWP instruction (CONFIG_SWP_EMULATE)

---------------------------------------------------------------------



ARMv6 architecture deprecates use of the SWP/SWPB instructions, and recommeds

moving to the load-locked/store-conditional instructions LDREX and STREX.



ARMv7 multiprocessing extensions introduce the ability to disable these

instructions, triggering an undefined instruction exception when executed.

Trapped instructions are emulated using an LDREX/STREX or LDREXB/STREXB

sequence. If a memory access fault (an abort) occurs, a segmentation fault is

signalled to the triggering process.



/proc/cpu/swp_emulation holds some statistics/information, including the PID of

the last process to trigger the emulation to be invocated. For example:

---

Emulated SWP:		12

Emulated SWPB:		0

Aborted SWP{B}:		1

Last process:		314

---



NOTE: when accessing uncached shared regions, LDREX/STREX rely on an external

transaction monitoring block called a global monitor to maintain update

atomicity. If your system does not implement a global monitor, this option can

cause programs that perform SWP operations to uncached memory to deadlock, as

the STREX operation will always fail.

arch/arm/Kconfig

+39 −26
Original line number Diff line number Diff line
@@ -2,6 +2,7 @@ config ARM 
	bool

	default y

	select HAVE_AOUT

	select HAVE_DMA_API_DEBUG

	select HAVE_IDE

	select HAVE_MEMBLOCK

	select RTC_LIB
@@ -36,6 +37,9 @@ config ARM 
config HAVE_PWM

	bool



config MIGHT_HAVE_PCI

	bool



config SYS_SUPPORTS_APM_EMULATION

	bool
@@ -226,7 +230,7 @@ config ARCH_INTEGRATOR 
	bool "ARM Ltd. Integrator family"

	select ARM_AMBA

	select ARCH_HAS_CPUFREQ

	select COMMON_CLKDEV

	select CLKDEV_LOOKUP

	select ICST

	select GENERIC_CLOCKEVENTS

	select PLAT_VERSATILE
@@ -236,7 +240,7 @@ config ARCH_INTEGRATOR 
config ARCH_REALVIEW

	bool "ARM Ltd. RealView family"

	select ARM_AMBA

	select COMMON_CLKDEV

	select CLKDEV_LOOKUP

	select HAVE_SCHED_CLOCK

	select ICST

	select GENERIC_CLOCKEVENTS
@@ -251,7 +255,7 @@ config ARCH_VERSATILE 
	bool "ARM Ltd. Versatile family"

	select ARM_AMBA

	select ARM_VIC

	select COMMON_CLKDEV

	select CLKDEV_LOOKUP

	select HAVE_SCHED_CLOCK

	select ICST

	select GENERIC_CLOCKEVENTS
@@ -266,7 +270,7 @@ config ARCH_VEXPRESS 
	select ARCH_WANT_OPTIONAL_GPIOLIB

	select ARM_AMBA

	select ARM_TIMER_SP804

	select COMMON_CLKDEV

	select CLKDEV_LOOKUP

	select GENERIC_CLOCKEVENTS

	select HAVE_CLK

	select HAVE_SCHED_CLOCK
@@ -288,7 +292,7 @@ config ARCH_BCMRING 
	depends on MMU

	select CPU_V6

	select ARM_AMBA

	select COMMON_CLKDEV

	select CLKDEV_LOOKUP

	select GENERIC_CLOCKEVENTS

	select ARCH_WANT_OPTIONAL_GPIOLIB

	help
@@ -306,6 +310,7 @@ config ARCH_CNS3XXX 
	select CPU_V6

	select GENERIC_CLOCKEVENTS

	select ARM_GIC

	select MIGHT_HAVE_PCI

	select PCI_DOMAINS if PCI

	help

	  Support for Cavium Networks CNS3XXX platform.
@@ -335,7 +340,7 @@ config ARCH_EP93XX 
	select CPU_ARM920T

	select ARM_AMBA

	select ARM_VIC

	select COMMON_CLKDEV

	select CLKDEV_LOOKUP

	select ARCH_REQUIRE_GPIOLIB

	select ARCH_HAS_HOLES_MEMORYMODEL

	select ARCH_USES_GETTIMEOFFSET
@@ -355,14 +360,14 @@ config ARCH_MXC 
	bool "Freescale MXC/iMX-based"

	select GENERIC_CLOCKEVENTS

	select ARCH_REQUIRE_GPIOLIB

	select COMMON_CLKDEV

	select CLKDEV_LOOKUP

	help

	  Support for Freescale MXC/iMX-based family of processors



config ARCH_STMP3XXX

	bool "Freescale STMP3xxx"

	select CPU_ARM926T

	select COMMON_CLKDEV

	select CLKDEV_LOOKUP

	select ARCH_REQUIRE_GPIOLIB

	select GENERIC_CLOCKEVENTS

	select USB_ARCH_HAS_EHCI
@@ -442,6 +447,7 @@ config ARCH_IXP4XX 
	select GENERIC_GPIO

	select GENERIC_CLOCKEVENTS

	select HAVE_SCHED_CLOCK

	select MIGHT_HAVE_PCI

	select DMABOUNCE if PCI

	help

	  Support for Intel's IXP4XX (XScale) family of processors.
@@ -481,7 +487,7 @@ config ARCH_LPC32XX 
	select HAVE_IDE

	select ARM_AMBA

	select USB_ARCH_HAS_OHCI

	select COMMON_CLKDEV

	select CLKDEV_LOOKUP

	select GENERIC_TIME

	select GENERIC_CLOCKEVENTS

	help
@@ -515,7 +521,7 @@ config ARCH_MMP 
	bool "Marvell PXA168/910/MMP2"

	depends on MMU

	select ARCH_REQUIRE_GPIOLIB

	select COMMON_CLKDEV

	select CLKDEV_LOOKUP

	select GENERIC_CLOCKEVENTS

	select HAVE_SCHED_CLOCK

	select TICK_ONESHOT
@@ -549,7 +555,7 @@ config ARCH_W90X900 
	bool "Nuvoton W90X900 CPU"

	select CPU_ARM926T

	select ARCH_REQUIRE_GPIOLIB

	select COMMON_CLKDEV

	select CLKDEV_LOOKUP

	select GENERIC_CLOCKEVENTS

	help

	  Support for Nuvoton (Winbond logic dept.) ARM9 processor,
@@ -563,19 +569,19 @@ config ARCH_W90X900 
config ARCH_NUC93X

	bool "Nuvoton NUC93X CPU"

	select CPU_ARM926T

	select COMMON_CLKDEV

	select CLKDEV_LOOKUP

	help

	  Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a

	  low-power and high performance MPEG-4/JPEG multimedia controller chip.



config ARCH_TEGRA

	bool "NVIDIA Tegra"

	select CLKDEV_LOOKUP

	select GENERIC_TIME

	select GENERIC_CLOCKEVENTS

	select GENERIC_GPIO

	select HAVE_CLK

	select HAVE_SCHED_CLOCK

	select COMMON_CLKDEV

	select ARCH_HAS_BARRIERS if CACHE_L2X0

	select ARCH_HAS_CPUFREQ

	help
@@ -585,7 +591,7 @@ config ARCH_TEGRA 
config ARCH_PNX4008

	bool "Philips Nexperia PNX4008 Mobile"

	select CPU_ARM926T

	select COMMON_CLKDEV

	select CLKDEV_LOOKUP

	select ARCH_USES_GETTIMEOFFSET

	help

	  This enables support for Philips PNX4008 mobile platform.
@@ -595,7 +601,7 @@ config ARCH_PXA 
	depends on MMU

	select ARCH_MTD_XIP

	select ARCH_HAS_CPUFREQ

	select COMMON_CLKDEV

	select CLKDEV_LOOKUP

	select ARCH_REQUIRE_GPIOLIB

	select GENERIC_CLOCKEVENTS

	select HAVE_SCHED_CLOCK
@@ -774,7 +780,7 @@ config ARCH_TCC_926 
	bool "Telechips TCC ARM926-based systems"

	select CPU_ARM926T

	select HAVE_CLK

	select COMMON_CLKDEV

	select CLKDEV_LOOKUP

	select GENERIC_CLOCKEVENTS

	help

	  Support for Telechips TCC ARM926-based systems.
@@ -799,7 +805,7 @@ config ARCH_U300 
	select ARM_AMBA

	select ARM_VIC

	select GENERIC_CLOCKEVENTS

	select COMMON_CLKDEV

	select CLKDEV_LOOKUP

	select GENERIC_GPIO

	help

	  Support for ST-Ericsson U300 series mobile platforms.
@@ -809,7 +815,7 @@ config ARCH_U8500 
	select CPU_V7

	select ARM_AMBA

	select GENERIC_CLOCKEVENTS

	select COMMON_CLKDEV

	select CLKDEV_LOOKUP

	select ARCH_REQUIRE_GPIOLIB

	help

	  Support for ST-Ericsson's Ux500 architecture
@@ -819,7 +825,7 @@ config ARCH_NOMADIK 
	select ARM_AMBA

	select ARM_VIC

	select CPU_ARM926T

	select COMMON_CLKDEV

	select CLKDEV_LOOKUP

	select GENERIC_CLOCKEVENTS

	select ARCH_REQUIRE_GPIOLIB

	help
@@ -831,7 +837,7 @@ config ARCH_DAVINCI 
	select ARCH_REQUIRE_GPIOLIB

	select ZONE_DMA

	select HAVE_IDE

	select COMMON_CLKDEV

	select CLKDEV_LOOKUP

	select GENERIC_ALLOCATOR

	select ARCH_HAS_HOLES_MEMORYMODEL

	help
@@ -852,7 +858,7 @@ config PLAT_SPEAR 
	bool "ST SPEAr"

	select ARM_AMBA

	select ARCH_REQUIRE_GPIOLIB

	select COMMON_CLKDEV

	select CLKDEV_LOOKUP

	select GENERIC_CLOCKEVENTS

	select HAVE_CLK

	help
@@ -1034,6 +1040,11 @@ config CPU_HAS_PMU 
	default y

	bool



config MULTI_IRQ_HANDLER

	bool

	help

	  Allow each machine to specify it's own IRQ handler at run time.



if !MMU

source "arch/arm/Kconfig-nommu"

endif
@@ -1181,7 +1192,7 @@ config ISA_DMA_API 
	bool



config PCI

	bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE || ARCH_CNS3XXX || SA1100_NANOENGINE

	bool "PCI support" if MIGHT_HAVE_PCI

	help

	  Find out whether you have a PCI motherboard. PCI is the name of a

	  bus system, i.e. the way the CPU talks to the other stuff inside
@@ -1253,7 +1264,7 @@ config SMP 
config SMP_ON_UP

	bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"

	depends on EXPERIMENTAL

	depends on SMP && !XIP && !THUMB2_KERNEL

	depends on SMP && !XIP

	default y

	help

	  SMP kernels contain instructions which fail on non-SMP processors.
@@ -1272,6 +1283,7 @@ config HAVE_ARM_SCU 
config HAVE_ARM_TWD

	bool

	depends on SMP

	select TICK_ONESHOT

	help

	  This options enables support for the ARM timer and watchdog unit
@@ -1335,7 +1347,7 @@ config HZ 
	default 100



config THUMB2_KERNEL

	bool "Compile the kernel in Thumb-2 mode"

	bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"

	depends on CPU_V7 && !CPU_V6 && EXPERIMENTAL

	select AEABI

	select ARM_ASM_UNIFIED
@@ -1549,6 +1561,7 @@ config SECCOMP 


config CC_STACKPROTECTOR

	bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"

	depends on EXPERIMENTAL

	help

	  This option turns on the -fstack-protector GCC feature. This

	  feature puts, at the beginning of functions, a canary value on
@@ -1745,7 +1758,7 @@ config CPU_FREQ_S3C 
	  Internal configuration node for common cpufreq on Samsung SoC



config CPU_FREQ_S3C24XX

	bool "CPUfreq driver for Samsung S3C24XX series CPUs"

	bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"

	depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL

	select CPU_FREQ_S3C

	help
@@ -1757,7 +1770,7 @@ config CPU_FREQ_S3C24XX 
	  If in doubt, say N.



config CPU_FREQ_S3C24XX_PLL

	bool "Support CPUfreq changing of PLL frequency"

	bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"

	depends on CPU_FREQ_S3C24XX && EXPERIMENTAL

	help

	  Compile in support for changing the PLL frequency from the

arch/arm/Kconfig.debug

+1 −1
Original line number Diff line number Diff line
@@ -31,7 +31,7 @@ config FRAME_POINTER 
	  reported is severely limited.



config ARM_UNWIND

	bool "Enable stack unwinding support"

	bool "Enable stack unwinding support (EXPERIMENTAL)"

	depends on AEABI && EXPERIMENTAL

	default y

	help

arch/arm/common/Kconfig

+0 −4
Original line number Diff line number Diff line
@@ -37,7 +37,3 @@ config SHARP_PARAM 


config SHARP_SCOOP

	bool
 


config COMMON_CLKDEV

	bool

	select HAVE_CLK