select BUILDTIME_EXTABLE_SORT if MMU
select CPU_PM if (SUSPEND || CPU_IDLE)
select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN && MMU
- select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
+ select GENERIC_ATOMIC64 if (CPU_V7M || CPU_V6 || !CPU_32v6K || !AEABI)
select GENERIC_CLOCKEVENTS_BROADCAST if SMP
select GENERIC_IRQ_PROBE
select GENERIC_IRQ_SHOW
select GENERIC_PCI_IOMAP
select GENERIC_SMP_IDLE_THREAD
+ select GENERIC_IDLE_POLL_SETUP
select GENERIC_STRNCPY_FROM_USER
select GENERIC_STRNLEN_USER
select HARDIRQS_SW_RESEND
select HAVE_GENERIC_HARDIRQS
select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
select HAVE_IDE if PCI || ISA || PCMCIA
+ select HAVE_IRQ_TIME_ACCOUNTING
select HAVE_KERNEL_GZIP
select HAVE_KERNEL_LZMA
select HAVE_KERNEL_LZO
select HAVE_REGS_AND_STACK_ACCESS_API
select HAVE_SYSCALL_TRACEPOINTS
select HAVE_UID16
- select HAVE_VIRT_TO_BUS
select KTIME_SCALAR
select PERF_USE_VMALLOC
select RTC_LIB
select CLONE_BACKWARDS
select OLD_SIGSUSPEND3
select OLD_SIGACTION
+ select HAVE_CONTEXT_TRACKING
help
The ARM series is a line of low-power-consumption RISC chip designs
licensed by ARM Ltd and targeted at embedded applications and
config SYS_SUPPORTS_APM_EMULATION
bool
-config GENERIC_GPIO
- bool
-
config HAVE_TCM
bool
select GENERIC_ALLOCATOR
This enables support for systems based on Atmel
AT91RM9200 and AT91SAM9* processors.
-config ARCH_BCM2835
- bool "Broadcom BCM2835 family"
- select ARCH_REQUIRE_GPIOLIB
- select ARM_AMBA
- select ARM_ERRATA_411920
- select ARM_TIMER_SP804
- select CLKDEV_LOOKUP
- select CLKSRC_OF
- select COMMON_CLK
- select CPU_V6
- select GENERIC_CLOCKEVENTS
- select MULTI_IRQ_HANDLER
- select PINCTRL
- select PINCTRL_BCM2835
- select SPARSE_IRQ
- select USE_OF
- help
- This enables support for the Broadcom BCM2835 SoC. This SoC is
- use in the Raspberry Pi, and Roku 2 devices.
-
-config ARCH_CNS3XXX
- bool "Cavium Networks CNS3XXX family"
- select ARM_GIC
- select CPU_V6K
- select GENERIC_CLOCKEVENTS
- select MIGHT_HAVE_CACHE_L2X0
- select MIGHT_HAVE_PCI
- select PCI_DOMAINS if PCI
- help
- Support for Cavium Networks CNS3XXX platform.
-
config ARCH_CLPS711X
bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
select ARCH_REQUIRE_GPIOLIB
bool "Cortina Systems Gemini"
select ARCH_REQUIRE_GPIOLIB
select ARCH_USES_GETTIMEOFFSET
+ select NEED_MACH_GPIO_H
select CPU_FA526
help
Support for the Cortina Systems Gemini family SoCs
-config ARCH_SIRF
- bool "CSR SiRF"
- select ARCH_REQUIRE_GPIOLIB
- select AUTO_ZRELADDR
- select COMMON_CLK
- select GENERIC_CLOCKEVENTS
- select GENERIC_IRQ_CHIP
- select MIGHT_HAVE_CACHE_L2X0
- select NO_IOPORT
- select PINCTRL
- select PINCTRL_SIRF
- select USE_OF
- help
- Support for CSR SiRFprimaII/Marco/Polo platforms
-
config ARCH_EBSA110
bool "EBSA-110"
select ARCH_USES_GETTIMEOFFSET
Support for systems based on the DC21285 companion chip
("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
-config ARCH_MXS
- bool "Freescale MXS-based"
- select ARCH_REQUIRE_GPIOLIB
- select CLKDEV_LOOKUP
- select CLKSRC_MMIO
- select COMMON_CLK
- select GENERIC_CLOCKEVENTS
- select HAVE_CLK_PREPARE
- select MULTI_IRQ_HANDLER
- select PINCTRL
- select SPARSE_IRQ
- select USE_OF
- help
- Support for Freescale MXS-based family of processors
-
config ARCH_NETX
bool "Hilscher NetX based"
select ARM_VIC
help
This enables support for systems based on the Hilscher NetX Soc
-config ARCH_H720X
- bool "Hynix HMS720x-based"
- select ARCH_USES_GETTIMEOFFSET
- select CPU_ARM720T
- select ISA_DMA_API
- help
- This enables support for systems based on the Hynix HMS720x
-
config ARCH_IOP13XX
bool "IOP13xx-based"
depends on MMU
select GENERIC_CLOCKEVENTS
select MIGHT_HAVE_PCI
select NEED_MACH_IO_H
+ select USB_EHCI_BIG_ENDIAN_MMIO
+ select USB_EHCI_BIG_ENDIAN_DESC
help
Support for Intel's IXP4XX (XScale) family of processors.
config ARCH_DOVE
bool "Marvell Dove"
select ARCH_REQUIRE_GPIOLIB
- select COMMON_CLK_DOVE
- select CPU_V7
+ select CPU_PJ4
select GENERIC_CLOCKEVENTS
select MIGHT_HAVE_PCI
select PINCTRL
select PINCTRL_DOVE
select PLAT_ORION_LEGACY
select USB_ARCH_HAS_EHCI
+ select MVEBU_MBUS
help
Support for the Marvell Dove SoC 88AP510
select PINCTRL
select PINCTRL_KIRKWOOD
select PLAT_ORION_LEGACY
+ select MVEBU_MBUS
help
Support for the following Marvell Kirkwood series SoCs:
88F6180, 88F6192 and 88F6281.
select GENERIC_CLOCKEVENTS
select PCI
select PLAT_ORION_LEGACY
+ select MVEBU_MBUS
help
Support for the following Marvell MV78xx0 series SoCs:
MV781x0, MV782x0.
select GENERIC_CLOCKEVENTS
select PCI
select PLAT_ORION_LEGACY
+ select MVEBU_MBUS
help
Support for the following Marvell Orion 5x series SoCs:
Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
help
Support for the NXP LPC32XX family of processors
-config ARCH_TEGRA
- bool "NVIDIA Tegra"
- select ARCH_HAS_CPUFREQ
- select ARCH_REQUIRE_GPIOLIB
- select CLKDEV_LOOKUP
- select CLKSRC_MMIO
- select CLKSRC_OF
- select COMMON_CLK
- select GENERIC_CLOCKEVENTS
- select HAVE_CLK
- select HAVE_SMP
- select MIGHT_HAVE_CACHE_L2X0
- select SPARSE_IRQ
- select USE_OF
- help
- This enables support for NVIDIA Tegra based systems (Tegra APX,
- Tegra 6xx and Tegra 2 series).
-
config ARCH_PXA
bool "PXA2xx/PXA3xx-based"
depends on MMU
bool "Renesas SH-Mobile / R-Mobile"
select CLKDEV_LOOKUP
select GENERIC_CLOCKEVENTS
+ select HAVE_ARM_SCU if SMP
+ select HAVE_ARM_TWD if LOCAL_TIMERS
select HAVE_CLK
select HAVE_MACH_CLKDEV
select HAVE_SMP
select MULTI_IRQ_HANDLER
select NEED_MACH_MEMORY_H
select NO_IOPORT
- select PINCTRL
+ select PINCTRL if ARCH_WANT_OPTIONAL_GPIOLIB
select PM_GENERIC_DOMAINS if PM
select SPARSE_IRQ
help
select NEED_MACH_IO_H
select NEED_MACH_MEMORY_H
select NO_IOPORT
+ select VIRT_TO_BUS
help
On the Acorn Risc-PC, Linux can support the internal IDE disk and
CD-ROM interface, serial and parallel port, and the floppy drive.
config ARCH_S3C24XX
bool "Samsung S3C24XX SoCs"
select ARCH_HAS_CPUFREQ
- select ARCH_USES_GETTIMEOFFSET
+ select ARCH_REQUIRE_GPIOLIB
select CLKDEV_LOOKUP
+ select CLKSRC_MMIO
+ select GENERIC_CLOCKEVENTS
select HAVE_CLK
select HAVE_S3C2410_I2C if I2C
select HAVE_S3C2410_WATCHDOG if WATCHDOG
select HAVE_S3C_RTC if RTC_CLASS
+ select MULTI_IRQ_HANDLER
select NEED_MACH_GPIO_H
select NEED_MACH_IO_H
help
bool "Samsung S3C64XX"
select ARCH_HAS_CPUFREQ
select ARCH_REQUIRE_GPIOLIB
- select ARCH_USES_GETTIMEOFFSET
select ARM_VIC
select CLKDEV_LOOKUP
+ select CLKSRC_MMIO
select CPU_V6
+ select GENERIC_CLOCKEVENTS
select HAVE_CLK
select HAVE_S3C2410_I2C if I2C
select HAVE_S3C2410_WATCHDOG if WATCHDOG
config ARCH_S5PC100
bool "Samsung S5PC100"
- select ARCH_USES_GETTIMEOFFSET
+ select ARCH_REQUIRE_GPIOLIB
select CLKDEV_LOOKUP
+ select CLKSRC_MMIO
select CPU_V7
+ select GENERIC_CLOCKEVENTS
select HAVE_CLK
select HAVE_S3C2410_I2C if I2C
select HAVE_S3C2410_WATCHDOG if WATCHDOG
select ARCH_HAS_HOLES_MEMORYMODEL
select ARCH_SPARSEMEM_ENABLE
select CLKDEV_LOOKUP
+ select COMMON_CLK
select CPU_V7
select GENERIC_CLOCKEVENTS
select HAVE_CLK
select ISA_DMA
select NEED_MACH_MEMORY_H
select PCI
+ select VIRT_TO_BUS
select ZONE_DMA
help
Support for the StrongARM based Digital DNARD machine, also known
help
Support for ST-Ericsson U300 series mobile platforms.
-config ARCH_U8500
- bool "ST-Ericsson U8500 Series"
- depends on MMU
- select ARCH_HAS_CPUFREQ
- select ARCH_REQUIRE_GPIOLIB
- select ARM_AMBA
- select CLKDEV_LOOKUP
- select CPU_V7
- select GENERIC_CLOCKEVENTS
- select HAVE_SMP
- select MIGHT_HAVE_CACHE_L2X0
- select SPARSE_IRQ
- help
- Support for ST-Ericsson's Ux500 architecture
-
-config ARCH_NOMADIK
- bool "STMicroelectronics Nomadik"
- select ARCH_REQUIRE_GPIOLIB
- select ARM_AMBA
- select ARM_VIC
- select CLKSRC_NOMADIK_MTU
- select COMMON_CLK
- select CPU_ARM926T
- select GENERIC_CLOCKEVENTS
- select MIGHT_HAVE_CACHE_L2X0
- select USE_OF
- select PINCTRL
- select PINCTRL_STN8815
- select SPARSE_IRQ
- help
- Support for the Nomadik platform by ST-Ericsson
-
-config PLAT_SPEAR
- bool "ST SPEAr"
- select ARCH_HAS_CPUFREQ
- select ARCH_REQUIRE_GPIOLIB
- select ARM_AMBA
- select CLKDEV_LOOKUP
- select CLKSRC_MMIO
- select COMMON_CLK
- select GENERIC_CLOCKEVENTS
- select HAVE_CLK
- help
- Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
-
config ARCH_DAVINCI
bool "TI DaVinci"
select ARCH_HAS_HOLES_MEMORYMODEL
bool
config ARCH_MULTI_V6
- bool "ARMv6 based platforms (ARM11, Scorpion, ...)"
+ bool "ARMv6 based platforms (ARM11)"
select ARCH_MULTI_V6_V7
select CPU_V6
config ARCH_MULTI_V7
- bool "ARMv7 based platforms (Cortex-A, PJ4, Krait)"
+ bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
default y
select ARCH_MULTI_V6_V7
- select ARCH_VEXPRESS
select CPU_V7
config ARCH_MULTI_V6_V7
source "arch/arm/mach-bcm/Kconfig"
+source "arch/arm/mach-bcm2835/Kconfig"
+
source "arch/arm/mach-clps711x/Kconfig"
source "arch/arm/mach-cns3xxx/Kconfig"
source "arch/arm/mach-gemini/Kconfig"
-source "arch/arm/mach-h720x/Kconfig"
-
source "arch/arm/mach-highbank/Kconfig"
source "arch/arm/mach-integrator/Kconfig"
source "arch/arm/mach-socfpga/Kconfig"
-source "arch/arm/plat-spear/Kconfig"
+source "arch/arm/mach-spear/Kconfig"
source "arch/arm/mach-s3c24xx/Kconfig"
config ARM_TIMER_SP804
bool
select CLKSRC_MMIO
- select HAVE_SCHED_CLOCK
+ select CLKSRC_OF if OF
source arch/arm/mm/Kconfig
default 8
config IWMMXT
- bool "Enable iWMMXt support"
+ bool "Enable iWMMXt support" if !CPU_PJ4
depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
- default y if PXA27x || PXA3xx || ARCH_MMP
+ default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4
help
Enable support for iWMMXt context switching at run time if
running on a CPU that supports it.
to deadlock. This workaround puts DSB before executing ISB if
an abort may occur on cache maintenance.
+config ARM_ERRATA_798181
+ bool "ARM errata: TLBI/DSB failure on Cortex-A15"
+ depends on CPU_V7 && SMP
+ help
+ On Cortex-A15 (r0p0..r3p2) the TLBI*IS/DSB operations are not
+ adequately shooting down all use of the old entries. This
+ option enables the Linux kernel workaround for this erratum
+ which sends an IPI to the CPUs that are running the same ASID
+ as the one being invalidated.
+
endmenu
source "arch/arm/common/Kconfig"
bool
select ISA_DMA_API
-config ARCH_NO_VIRT_TO_BUS
- def_bool y
- depends on !ARCH_RPC && !ARCH_NETWINDER && !ARCH_SHARK
-
# Select ISA DMA interface
config ISA_DMA_API
bool
depends on GENERIC_CLOCKEVENTS
depends on HAVE_SMP
depends on MMU
- select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
select USE_GENERIC_SMP_HELPERS
help
This enables support for systems with more than one CPU. If you have
config HAVE_ARM_TWD
bool
depends on SMP
+ select CLKSRC_OF if OF
help
This options enables support for the ARM timer and watchdog unit
+config MCPM
+ bool "Multi-Cluster Power Management"
+ depends on CPU_V7 && SMP
+ help
+ This option provides the common power management infrastructure
+ for (multi-)cluster based systems, such as big.LITTLE based
+ systems.
+
choice
prompt "Memory split"
default VMSPLIT_3G
bool "Use local timer interrupts"
depends on SMP
default y
- select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
help
Enable support for local timers on SMP platforms, rather then the
legacy IPI broadcast method. Local timers allows the system
accounting to be spread across the timer interval, preventing a
"thundering herd" at every timer tick.
+# The GPIO number here must be sorted by descending number. In case of
+# a multiplatform kernel, we just want the highest value required by the
+# selected platforms.
config ARCH_NR_GPIO
int
default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
- default 355 if ARCH_U8500
- default 264 if MACH_H4700
default 512 if SOC_OMAP5
- default 288 if ARCH_VT8500 || ARCH_SUNXI
+ default 392 if ARCH_U8500
+ default 352 if ARCH_VT8500
+ default 288 if ARCH_SUNXI
+ default 264 if MACH_H4700
default 0
help
Maximum number of GPIOs in the system.
config THUMB2_KERNEL
bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY
- depends on CPU_V7 && !CPU_V6 && !CPU_V6K
+ depends on (CPU_V7 || CPU_V7M) && !CPU_V6 && !CPU_V6K
default y if CPU_THUMBONLY
select AEABI
select ARM_ASM_UNIFIED
config XEN
bool "Xen guest support on ARM (EXPERIMENTAL)"
- depends on ARM && OF
+ depends on ARM && AEABI && OF
depends on CPU_V7 && !CPU_V6
+ depends on !GENERIC_ATOMIC64
+ select ARM_PSCI
help
Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
menu "CPU Power Management"
if ARCH_HAS_CPUFREQ
-
source "drivers/cpufreq/Kconfig"
-config CPU_FREQ_IMX
- tristate "CPUfreq driver for i.MX CPUs"
- depends on ARCH_MXC && CPU_FREQ
- select CPU_FREQ_TABLE
- help
- This enables the CPUfreq driver for i.MX CPUs.
-
-config CPU_FREQ_SA1100
- bool
-
-config CPU_FREQ_SA1110
- bool
-
-config CPU_FREQ_INTEGRATOR
- tristate "CPUfreq driver for ARM Integrator CPUs"
- depends on ARCH_INTEGRATOR && CPU_FREQ
- default y
- help
- This enables the CPUfreq driver for ARM Integrator CPUs.
-
- For details, take a look at <file:Documentation/cpu-freq>.
-
- If in doubt, say Y.
-
-config CPU_FREQ_PXA
- bool
- depends on CPU_FREQ && ARCH_PXA && PXA25x
- default y
- select CPU_FREQ_DEFAULT_GOV_USERSPACE
- select CPU_FREQ_TABLE
-
config CPU_FREQ_S3C
bool
help
# Note that GCC does not numerically define an architecture version
# macro, but instead defines a whole series of macros which makes
# testing for a specific architecture or later rather impossible.
+ arch-$(CONFIG_CPU_32v7M) :=-D__LINUX_ARM_ARCH__=7 -march=armv7-m -Wa,-march=armv7-m
arch-$(CONFIG_CPU_32v7) :=-D__LINUX_ARM_ARCH__=7 $(call cc-option,-march=armv7-a,-march=armv5t -Wa$(comma)-march=armv7-a)
arch-$(CONFIG_CPU_32v6) :=-D__LINUX_ARM_ARCH__=6 $(call cc-option,-march=armv6,-march=armv5t -Wa$(comma)-march=armv6)
# Only override the compiler option if ARMv6. The ARMv6K extensions are
machine-$(CONFIG_ARCH_EBSA110) += ebsa110
machine-$(CONFIG_ARCH_EP93XX) += ep93xx
machine-$(CONFIG_ARCH_GEMINI) += gemini
-machine-$(CONFIG_ARCH_H720X) += h720x
machine-$(CONFIG_ARCH_HIGHBANK) += highbank
machine-$(CONFIG_ARCH_INTEGRATOR) += integrator
machine-$(CONFIG_ARCH_IOP13XX) += iop13xx
machine-$(CONFIG_ARCH_W90X900) += w90x900
machine-$(CONFIG_FOOTBRIDGE) += footbridge
machine-$(CONFIG_ARCH_SOCFPGA) += socfpga
-machine-$(CONFIG_ARCH_SPEAR13XX) += spear13xx
-machine-$(CONFIG_ARCH_SPEAR3XX) += spear3xx
-machine-$(CONFIG_MACH_SPEAR600) += spear6xx
+machine-$(CONFIG_PLAT_SPEAR) += spear
machine-$(CONFIG_ARCH_VIRT) += virt
machine-$(CONFIG_ARCH_ZYNQ) += zynq
machine-$(CONFIG_ARCH_SUNXI) += sunxi
plat-$(CONFIG_PLAT_PXA) += pxa
plat-$(CONFIG_PLAT_S3C24XX) += samsung
plat-$(CONFIG_PLAT_S5P) += samsung
-plat-$(CONFIG_PLAT_SPEAR) += spear
plat-$(CONFIG_PLAT_VERSATILE) += versatile
ifeq ($(CONFIG_ARCH_EBSA110),y)
echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
echo '* xipImage - XIP kernel image, if configured (arch/$(ARCH)/boot/xipImage)'
echo ' uImage - U-Boot wrapped zImage'
- echo ' bootpImage - Combined zImage and initial RAM disk'
+ echo ' bootpImage - Combined zImage and initial RAM disk'
echo ' (supply initrd image via make variable INITRD=<path>)'
echo '* dtbs - Build device tree blobs for enabled boards'
echo ' install - Install uncompressed kernel'
#undef _CACHE
#undef MULTI_CACHE
-#if defined(CONFIG_CPU_CACHE_V3)
-# ifdef _CACHE
-# define MULTI_CACHE 1
-# else
-# define _CACHE v3
-# endif
-#endif
-
#if defined(CONFIG_CPU_CACHE_V4)
# ifdef _CACHE
# define MULTI_CACHE 1
# endif
#endif
+ #if defined(CONFIG_CPU_V7M)
+ # ifdef _CACHE
+ # define MULTI_CACHE 1
+ # else
+ # define _CACHE nop
+ # endif
+ #endif
+
#if !defined(_CACHE) && !defined(MULTI_CACHE)
#error Unknown cache maintenance model
#endif
+ #ifndef __ASSEMBLER__
+ extern inline void nop_flush_icache_all(void) { }
+ extern inline void nop_flush_kern_cache_all(void) { }
+ extern inline void nop_flush_kern_cache_louis(void) { }
+ extern inline void nop_flush_user_cache_all(void) { }
+ extern inline void nop_flush_user_cache_range(unsigned long a,
+ unsigned long b, unsigned int c) { }
+
+ extern inline void nop_coherent_kern_range(unsigned long a, unsigned long b) { }
+ extern inline int nop_coherent_user_range(unsigned long a,
+ unsigned long b) { return 0; }
+ extern inline void nop_flush_kern_dcache_area(void *a, size_t s) { }
+
+ extern inline void nop_dma_flush_range(const void *a, const void *b) { }
+
+ extern inline void nop_dma_map_area(const void *s, size_t l, int f) { }
+ extern inline void nop_dma_unmap_area(const void *s, size_t l, int f) { }
+ #endif
+
#ifndef MULTI_CACHE
#define __cpuc_flush_icache_all __glue(_CACHE,_flush_icache_all)
#define __cpuc_flush_kern_all __glue(_CACHE,_flush_kern_cache_all)
ldr r1, [tsk, #TI_FLAGS]
tst r1, #_TIF_WORK_MASK
bne fast_work_pending
-#if defined(CONFIG_IRQSOFF_TRACER)
asm_trace_hardirqs_on
-#endif
/* perform architecture specific actions before user return */
arch_ret_to_user r1, lr
+ ct_user_enter
restore_user_regs fast = 1, offset = S_OFF
UNWIND(.fnend )
tst r1, #_TIF_WORK_MASK
bne work_pending
no_work_pending:
-#if defined(CONFIG_IRQSOFF_TRACER)
asm_trace_hardirqs_on
-#endif
+
/* perform architecture specific actions before user return */
arch_ret_to_user r1, lr
+ ct_user_enter save = 0
restore_user_regs fast = 0, offset = 0
ENDPROC(ret_to_user_from_irq)
*/
.macro mcount_enter
+/*
+ * This pad compensates for the push {lr} at the call site. Note that we are
+ * unable to unwind through a function which does not otherwise save its lr.
+ */
+ UNWIND(.pad #4)
stmdb sp!, {r0-r3, lr}
+ UNWIND(.save {r0-r3, lr})
.endm
.macro mcount_get_lr reg
.endm
ENTRY(__gnu_mcount_nc)
+UNWIND(.fnstart)
#ifdef CONFIG_DYNAMIC_FTRACE
mov ip, lr
ldmia sp!, {lr}
#else
__mcount
#endif
+UNWIND(.fnend)
ENDPROC(__gnu_mcount_nc)
#ifdef CONFIG_DYNAMIC_FTRACE
ENTRY(ftrace_caller)
+UNWIND(.fnstart)
__ftrace_caller
+UNWIND(.fnend)
ENDPROC(ftrace_caller)
#endif
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
ENTRY(ftrace_graph_caller)
+UNWIND(.fnstart)
__ftrace_graph_caller
+UNWIND(.fnend)
ENDPROC(ftrace_graph_caller)
#endif
.align 5
ENTRY(vector_swi)
+ #ifdef CONFIG_CPU_V7M
+ v7m_exception_entry
+ #else
sub sp, sp, #S_FRAME_SIZE
stmia sp, {r0 - r12} @ Calling r0 - r12
ARM( add r8, sp, #S_PC )
str lr, [sp, #S_PC] @ Save calling PC
str r8, [sp, #S_PSR] @ Save CPSR
str r0, [sp, #S_OLD_R0] @ Save OLD_R0
+ #endif
zero_fp
/*
mcr p15, 0, ip, c1, c0 @ update control register
#endif
enable_irq
+ ct_user_exit
get_thread_info tsk
adr tbl, sys_call_table @ load syscall table pointer
#include <asm/asm-offsets.h>
#include <asm/errno.h>
#include <asm/thread_info.h>
+ #include <asm/v7m.h>
@ Bad Abort numbers
@ -----------------
#endif
.endm
+ #ifdef CONFIG_CPU_V7M
+ /*
+ * ARMv7-M exception entry/exit macros.
+ *
+ * xPSR, ReturnAddress(), LR (R14), R12, R3, R2, R1, and R0 are
+ * automatically saved on the current stack (32 words) before
+ * switching to the exception stack (SP_main).
+ *
+ * If exception is taken while in user mode, SP_main is
+ * empty. Otherwise, SP_main is aligned to 64 bit automatically
+ * (CCR.STKALIGN set).
+ *
+ * Linux assumes that the interrupts are disabled when entering an
+ * exception handler and it may BUG if this is not the case. Interrupts
+ * are disabled during entry and reenabled in the exit macro.
+ *
+ * v7m_exception_slow_exit is used when returning from SVC or PendSV.
+ * When returning to kernel mode, we don't return from exception.
+ */
+ .macro v7m_exception_entry
+ @ determine the location of the registers saved by the core during
+ @ exception entry. Depending on the mode the cpu was in when the
+ @ exception happend that is either on the main or the process stack.
+ @ Bit 2 of EXC_RETURN stored in the lr register specifies which stack
+ @ was used.
+ tst lr, #EXC_RET_STACK_MASK
+ mrsne r12, psp
+ moveq r12, sp
+
+ @ we cannot rely on r0-r3 and r12 matching the value saved in the
+ @ exception frame because of tail-chaining. So these have to be
+ @ reloaded.
+ ldmia r12!, {r0-r3}
+
+ @ Linux expects to have irqs off. Do it here before taking stack space
+ cpsid i
+
+ sub sp, #S_FRAME_SIZE-S_IP
+ stmdb sp!, {r0-r11}
+
+ @ load saved r12, lr, return address and xPSR.
+ @ r0-r7 are used for signals and never touched from now on. Clobbering
+ @ r8-r12 is OK.
+ mov r9, r12
+ ldmia r9!, {r8, r10-r12}
+
+ @ calculate the original stack pointer value.
+ @ r9 currently points to the memory location just above the auto saved
+ @ xPSR.
+ @ The cpu might automatically 8-byte align the stack. Bit 9
+ @ of the saved xPSR specifies if stack aligning took place. In this case
+ @ another 32-bit value is included in the stack.
+
+ tst r12, V7M_xPSR_FRAMEPTRALIGN
+ addne r9, r9, #4
+
+ @ store saved r12 using str to have a register to hold the base for stm
+ str r8, [sp, #S_IP]
+ add r8, sp, #S_SP
+ @ store r13-r15, xPSR
+ stmia r8!, {r9-r12}
+ @ store old_r0
+ str r0, [r8]
+ .endm
+
+ /*
+ * PENDSV and SVCALL are configured to have the same exception
+ * priorities. As a kernel thread runs at SVCALL execution priority it
+ * can never be preempted and so we will never have to return to a
+ * kernel thread here.
+ */
+ .macro v7m_exception_slow_exit ret_r0
+ cpsid i
+ ldr lr, =EXC_RET_THREADMODE_PROCESSSTACK
+
+ @ read original r12, sp, lr, pc and xPSR
+ add r12, sp, #S_IP
+ ldmia r12, {r1-r5}
+
+ @ an exception frame is always 8-byte aligned. To tell the hardware if
+ @ the sp to be restored is aligned or not set bit 9 of the saved xPSR
+ @ accordingly.
+ tst r2, #4
+ subne r2, r2, #4
+ orrne r5, V7M_xPSR_FRAMEPTRALIGN
+ biceq r5, V7M_xPSR_FRAMEPTRALIGN
+
+ @ write basic exception frame
+ stmdb r2!, {r1, r3-r5}
+ ldmia sp, {r1, r3-r5}
+ .if \ret_r0
+ stmdb r2!, {r0, r3-r5}
+ .else
+ stmdb r2!, {r1, r3-r5}
+ .endif
+
+ @ restore process sp
+ msr psp, r2
+
+ @ restore original r4-r11
+ ldmia sp!, {r0-r11}
+
+ @ restore main sp
+ add sp, sp, #S_FRAME_SIZE-S_IP
+
+ cpsie i
+ bx lr
+ .endm
+ #endif /* CONFIG_CPU_V7M */
+
@
@ Store/load the USER SP and LR registers by switching to the SYS
@ mode. Useful in Thumb-2 mode where "stm/ldm rd, {sp, lr}^" is not
.endm
#ifndef CONFIG_THUMB2_KERNEL
- .macro svc_exit, rpsr
+ .macro svc_exit, rpsr, irq = 0
+ .if \irq != 0
+ @ IRQs already off
+#ifdef CONFIG_TRACE_IRQFLAGS
+ @ The parent context IRQs must have been enabled to get here in
+ @ the first place, so there's no point checking the PSR I bit.
+ bl trace_hardirqs_on
+#endif
+ .else
+ @ IRQs off again before pulling preserved data off the stack
+ disable_irq_notrace
+#ifdef CONFIG_TRACE_IRQFLAGS
+ tst \rpsr, #PSR_I_BIT
+ bleq trace_hardirqs_on
+ tst \rpsr, #PSR_I_BIT
+ blne trace_hardirqs_off
+#endif
+ .endif
msr spsr_cxsf, \rpsr
#if defined(CONFIG_CPU_V6)
ldr r0, [sp]
mov pc, \reg
.endm
#else /* CONFIG_THUMB2_KERNEL */
- .macro svc_exit, rpsr
+ .macro svc_exit, rpsr, irq = 0
+ .if \irq != 0
+ @ IRQs already off
+#ifdef CONFIG_TRACE_IRQFLAGS
+ @ The parent context IRQs must have been enabled to get here in
+ @ the first place, so there's no point checking the PSR I bit.
+ bl trace_hardirqs_on
+#endif
+ .else
+ @ IRQs off again before pulling preserved data off the stack
+ disable_irq_notrace
+#ifdef CONFIG_TRACE_IRQFLAGS
+ tst \rpsr, #PSR_I_BIT
+ bleq trace_hardirqs_on
+ tst \rpsr, #PSR_I_BIT
+ blne trace_hardirqs_off
+#endif
+ .endif
ldr lr, [sp, #S_SP] @ top of the stack
ldrd r0, r1, [sp, #S_LR] @ calling lr and pc
clrex @ clear the exclusive monitor
rfeia sp!
.endm
+ #ifdef CONFIG_CPU_V7M
+ /*
+ * Note we don't need to do clrex here as clearing the local monitor is
+ * part of each exception entry and exit sequence.
+ */
+ .macro restore_user_regs, fast = 0, offset = 0
+ .if \offset
+ add sp, #\offset
+ .endif
+ v7m_exception_slow_exit ret_r0 = \fast
+ .endm
+ #else /* ifdef CONFIG_CPU_V7M */
.macro restore_user_regs, fast = 0, offset = 0
clrex @ clear the exclusive monitor
mov r2, sp
add sp, sp, #S_FRAME_SIZE - S_SP
movs pc, lr @ return & move spsr_svc into cpsr
.endm
+ #endif /* ifdef CONFIG_CPU_V7M / else */
.macro get_thread_info, rd
mov \rd, sp
.endm
#endif /* !CONFIG_THUMB2_KERNEL */
+/*
+ * Context tracking subsystem. Used to instrument transitions
+ * between user and kernel mode.
+ */
+ .macro ct_user_exit, save = 1
+#ifdef CONFIG_CONTEXT_TRACKING
+ .if \save
+ stmdb sp!, {r0-r3, ip, lr}
+ bl user_exit
+ ldmia sp!, {r0-r3, ip, lr}
+ .else
+ bl user_exit
+ .endif
+#endif
+ .endm
+
+ .macro ct_user_enter, save = 1
+#ifdef CONFIG_CONTEXT_TRACKING
+ .if \save
+ stmdb sp!, {r0-r3, ip, lr}
+ bl user_enter
+ ldmia sp!, {r0-r3, ip, lr}
+ .else
+ bl user_enter
+ .endif
+#endif
+ .endm
+
/*
* These are the registers used in the syscall handler, and allow us to
* have in theory up to 7 arguments to a function - r0 to r6.
#include <linux/bootmem.h>
#include <linux/seq_file.h>
#include <linux/screen_info.h>
+#include <linux/of_platform.h>
#include <linux/init.h>
#include <linux/kexec.h>
#include <linux/of_fdt.h>
#include <asm/virt.h>
#include "atags.h"
-#include "tcm.h"
#if defined(CONFIG_FPE_NWFPE) || defined(CONFIG_FPE_FASTFPE)
u32 und[3];
} ____cacheline_aligned;
+ #ifndef CONFIG_CPU_V7M
static struct stack stacks[NR_CPUS];
+ #endif
char elf_platform[ELF_PLATFORM_SIZE];
EXPORT_SYMBOL(elf_platform);
"5TEJ",
"6TEJ",
"7",
- "?(11)",
+ "7M",
"?(12)",
"?(13)",
"?(14)",
"?(17)",
};
+ #ifdef CONFIG_CPU_V7M
+ static int __get_cpu_architecture(void)
+ {
+ return CPU_ARCH_ARMv7M;
+ }
+ #else
static int __get_cpu_architecture(void)
{
int cpu_arch;
return cpu_arch;
}
+ #endif
int __pure cpu_architecture(void)
{
{
unsigned int arch = cpu_architecture();
- if (arch >= CPU_ARCH_ARMv6) {
+ if (arch == CPU_ARCH_ARMv7M) {
+ cacheid = 0;
+ } else if (arch >= CPU_ARCH_ARMv6) {
unsigned int cachetype = read_cpuid_cachetype();
if ((cachetype & (7 << 29)) == 4 << 29) {
/* ARMv7 register format */
printk("%s", buf);
}
+static void __init cpuid_init_hwcaps(void)
+{
+ unsigned int divide_instrs;
+
+ if (cpu_architecture() < CPU_ARCH_ARMv7)
+ return;
+
+ divide_instrs = (read_cpuid_ext(CPUID_EXT_ISAR0) & 0x0f000000) >> 24;
+
+ switch (divide_instrs) {
+ case 2:
+ elf_hwcap |= HWCAP_IDIVA;
+ case 1:
+ elf_hwcap |= HWCAP_IDIVT;
+ }
+}
+
static void __init feat_v6_fixup(void)
{
int id = read_cpuid_id();
*
* cpu_init sets up the per-CPU stacks.
*/
-void cpu_init(void)
+void notrace cpu_init(void)
{
+ #ifndef CONFIG_CPU_V7M
unsigned int cpu = smp_processor_id();
struct stack *stk = &stacks[cpu];
"I" (offsetof(struct stack, und[0])),
PLC (PSR_F_BIT | PSR_I_BIT | SVC_MODE)
: "r14");
+ #endif
}
int __cpu_logical_map[NR_CPUS];
snprintf(elf_platform, ELF_PLATFORM_SIZE, "%s%c",
list->elf_name, ENDIANNESS);
elf_hwcap = list->elf_hwcap;
+
+ cpuid_init_hwcaps();
+
#ifndef CONFIG_ARM_THUMB
- elf_hwcap &= ~HWCAP_THUMB;
+ elf_hwcap &= ~(HWCAP_THUMB | HWCAP_IDIVT);
#endif
feat_v6_fixup();
size -= start & ~PAGE_MASK;
bank->start = PAGE_ALIGN(start);
-#ifndef CONFIG_LPAE
+#ifndef CONFIG_ARM_LPAE
if (bank->start + size < bank->start) {
printk(KERN_CRIT "Truncating memory at 0x%08llx to fit in "
"32-bit physical address space\n", (long long)start);
static int __init customize_machine(void)
{
- /* customizes platform devices, or adds new ones */
+ /*
+ * customizes platform devices, or adds new ones
+ * On DT based machines, we fall back to populating the
+ * machine from the device tree, if no callback is provided,
+ * otherwise we would always need an init_machine callback.
+ */
if (machine_desc->init_machine)
machine_desc->init_machine();
+#ifdef CONFIG_OF
+ else
+ of_platform_populate(NULL, of_default_bus_match_table,
+ NULL, NULL);
+#endif
return 0;
}
arch_initcall(customize_machine);
reserve_crashkernel();
- tcm_init();
-
#ifdef CONFIG_MULTI_IRQ_HANDLER
handle_arch_irq = mdesc->handle_irq;
#endif
}
#endif
-void dump_stack(void)
-{
- dump_backtrace(NULL, NULL);
-}
-
-EXPORT_SYMBOL(dump_stack);
-
void show_stack(struct task_struct *tsk, unsigned long *sp)
{
dump_backtrace(NULL, tsk);
void __init early_trap_init(void *vectors_base)
{
+ #ifndef CONFIG_CPU_V7M
unsigned long vectors = (unsigned long)vectors_base;
extern char __stubs_start[], __stubs_end[];
extern char __vectors_start[], __vectors_end[];
flush_icache_range(vectors, vectors + PAGE_SIZE);
modify_domain(DOMAIN_USER, DOMAIN_CLIENT);
+ #else /* ifndef CONFIG_CPU_V7M */
+ /*
+ * on V7-M there is no need to copy the vector table to a dedicated
+ * memory area. The address is configurable and so a table in the kernel
+ * image can be used.
+ */
+ #endif
}
depends on !MMU
select CPU_32v4T
select CPU_ABRT_LV4T
- select CPU_CACHE_V3 # although the core is v4t
+ select CPU_CACHE_V4
select CPU_CP15_MPU
select CPU_PABRT_LEGACY
help
select CPU_PABRT_V7
select CPU_TLB_V7 if MMU
+ # ARMv7M
+ config CPU_V7M
+ bool
+ select CPU_32v7M
+ select CPU_ABRT_NOMMU
+ select CPU_CACHE_NOP
+ select CPU_PABRT_LEGACY
+ select CPU_THUMBONLY
+
config CPU_THUMBONLY
bool
# There are no CPUs available with MMU that don't implement an ARM ISA:
config CPU_32v7
bool
+ config CPU_32v7M
+ bool
+
# The abort model
config CPU_ABRT_NOMMU
bool
bool
# The cache model
-config CPU_CACHE_V3
- bool
-
config CPU_CACHE_V4
bool
config CPU_CACHE_V7
bool
+ config CPU_CACHE_NOP
+ bool
+
config CPU_CACHE_VIVT
bool
config ARM_THUMB
bool "Support Thumb user binaries" if !CPU_THUMBONLY
- depends on CPU_ARM720T || CPU_ARM740T || CPU_ARM920T || CPU_ARM922T || CPU_ARM925T || CPU_ARM926T || CPU_ARM940T || CPU_ARM946E || CPU_ARM1020 || CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_V6 || CPU_V6K || CPU_V7 || CPU_FEROCEON
+ depends on CPU_ARM720T || CPU_ARM740T || CPU_ARM920T || CPU_ARM922T || \
+ CPU_ARM925T || CPU_ARM926T || CPU_ARM940T || CPU_ARM946E || \
+ CPU_ARM1020 || CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || \
+ CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_V6 || CPU_V6K || \
+ CPU_V7 || CPU_FEROCEON || CPU_V7M
default y
help
Say Y if you want to include kernel support for running user space
obj-$(CONFIG_CPU_PABRT_V6) += pabort-v6.o
obj-$(CONFIG_CPU_PABRT_V7) += pabort-v7.o
-obj-$(CONFIG_CPU_CACHE_V3) += cache-v3.o
obj-$(CONFIG_CPU_CACHE_V4) += cache-v4.o
obj-$(CONFIG_CPU_CACHE_V4WT) += cache-v4wt.o
obj-$(CONFIG_CPU_CACHE_V4WB) += cache-v4wb.o
obj-$(CONFIG_CPU_CACHE_V6) += cache-v6.o
obj-$(CONFIG_CPU_CACHE_V7) += cache-v7.o
obj-$(CONFIG_CPU_CACHE_FA) += cache-fa.o
+ obj-$(CONFIG_CPU_CACHE_NOP) += cache-nop.o
AFLAGS_cache-v6.o :=-Wa,-march=armv6
AFLAGS_cache-v7.o :=-Wa,-march=armv7-a
obj-$(CONFIG_CPU_V6) += proc-v6.o
obj-$(CONFIG_CPU_V6K) += proc-v6.o
obj-$(CONFIG_CPU_V7) += proc-v7.o
+ obj-$(CONFIG_CPU_V7M) += proc-v7m.o
AFLAGS_proc-v6.o :=-Wa,-march=armv6
AFLAGS_proc-v7.o :=-Wa,-march=armv7-a
projects / karo-tx-linux.git / commitdiff