[mirror_ubuntu-bionic-kernel.git] / arch / arm / Kconfig.debug

menu "Kernel hacking"

source "lib/Kconfig.debug"

config STRICT_DEVMEM
	bool "Filter access to /dev/mem"
	depends on MMU
	---help---
	  If this option is disabled, you allow userspace (root) access to all
	  of memory, including kernel and userspace memory. Accidental
	  access to this is obviously disastrous, but specific access can
	  be used by people debugging the kernel.

	  If this option is switched on, the /dev/mem file only allows
	  userspace access to memory mapped peripherals.

          If in doubt, say Y.

# RMK wants arm kernels compiled with frame pointers or stack unwinding.
# If you know what you are doing and are willing to live without stack
# traces, you can get a slightly smaller kernel by setting this option to
# n, but then RMK will have to kill you ;).
config FRAME_POINTER
	bool
	depends on !THUMB2_KERNEL
	default y if !ARM_UNWIND || FUNCTION_GRAPH_TRACER
	help
	  If you say N here, the resulting kernel will be slightly smaller and
	  faster. However, if neither FRAME_POINTER nor ARM_UNWIND are enabled,
	  when a problem occurs with the kernel, the information that is
	  reported is severely limited.

config ARM_UNWIND
	bool "Enable stack unwinding support (EXPERIMENTAL)"
	depends on AEABI && EXPERIMENTAL
	default y
	help
	  This option enables stack unwinding support in the kernel
	  using the information automatically generated by the
	  compiler. The resulting kernel image is slightly bigger but
	  the performance is not affected. Currently, this feature
	  only works with EABI compilers. If unsure say Y.

config OLD_MCOUNT
	bool
	depends on FUNCTION_TRACER && FRAME_POINTER
	default y

config DEBUG_USER
	bool "Verbose user fault messages"
	help
	  When a user program crashes due to an exception, the kernel can
	  print a brief message explaining what the problem was. This is
	  sometimes helpful for debugging but serves no purpose on a
	  production system. Most people should say N here.

	  In addition, you need to pass user_debug=N on the kernel command
	  line to enable this feature.  N consists of the sum of:

	      1 - undefined instruction events
	      2 - system calls
	      4 - invalid data aborts
	      8 - SIGSEGV faults
	     16 - SIGBUS faults

# These options are only for real kernel hackers who want to get their hands dirty.
config DEBUG_LL
	bool "Kernel low-level debugging functions (read help!)"
	depends on DEBUG_KERNEL
	help
	  Say Y here to include definitions of printascii, printch, printhex
	  in the kernel.  This is helpful if you are debugging code that
	  executes before the console is initialized.

	  Note that selecting this option will limit the kernel to a single
	  UART definition, as specified below. Attempting to boot the kernel
	  image on a different platform *will not work*, so this option should
	  not be enabled for kernels that are intended to be portable.

choice
	prompt "Kernel low-level debugging port"
	depends on DEBUG_LL

	config AT91_DEBUG_LL_DBGU0
		bool "Kernel low-level debugging on rm9200, 9260/9g20, 9261/9g10 and 9rl"
		depends on HAVE_AT91_DBGU0

	config AT91_DEBUG_LL_DBGU1
		bool "Kernel low-level debugging on 9263 and 9g45"
		depends on HAVE_AT91_DBGU1

	config DEBUG_CLPS711X_UART1
		bool "Kernel low-level debugging messages via UART1"
		depends on ARCH_CLPS711X
		help
		  Say Y here if you want the debug print routines to direct
		  their output to the first serial port on these devices.

	config DEBUG_CLPS711X_UART2
		bool "Kernel low-level debugging messages via UART2"
		depends on ARCH_CLPS711X
		help
		  Say Y here if you want the debug print routines to direct
		  their output to the second serial port on these devices.

	config DEBUG_DAVINCI_DA8XX_UART1
		bool "Kernel low-level debugging on DaVinci DA8XX using UART1"
		depends on ARCH_DAVINCI_DA8XX
		help
		  Say Y here if you want the debug print routines to direct
		  their output to UART1 serial port on DaVinci DA8XX devices.

	config DEBUG_DAVINCI_DA8XX_UART2
		bool "Kernel low-level debugging on DaVinci DA8XX using UART2"
		depends on ARCH_DAVINCI_DA8XX
		help
		  Say Y here if you want the debug print routines to direct
		  their output to UART2 serial port on DaVinci DA8XX devices.

	config DEBUG_DAVINCI_DMx_UART0
		bool "Kernel low-level debugging on DaVinci DMx using UART0"
		depends on ARCH_DAVINCI_DMx
		help
		  Say Y here if you want the debug print routines to direct
		  their output to UART0 serial port on DaVinci DMx devices.

	config DEBUG_DAVINCI_TNETV107X_UART1
		bool "Kernel low-level debugging on DaVinci TNETV107x using UART1"
		depends on ARCH_DAVINCI_TNETV107X
		help
		  Say Y here if you want the debug print routines to direct
		  their output to UART1 serial port on DaVinci TNETV107X
		  devices.

	config DEBUG_DC21285_PORT
		bool "Kernel low-level debugging messages via footbridge serial port"
		depends on FOOTBRIDGE
		help
		  Say Y here if you want the debug print routines to direct
		  their output to the serial port in the DC21285 (Footbridge).

	config DEBUG_FOOTBRIDGE_COM1
		bool "Kernel low-level debugging messages via footbridge 8250 at PCI COM1"
		depends on FOOTBRIDGE
		help
		  Say Y here if you want the debug print routines to direct
		  their output to the 8250 at PCI COM1.

	config DEBUG_HIGHBANK_UART
		bool "Kernel low-level debugging messages via Highbank UART"
		depends on ARCH_HIGHBANK
		help
		  Say Y here if you want the debug print routines to direct
		  their output to the UART on Highbank based devices.

	config DEBUG_IMX1_UART
		bool "i.MX1 Debug UART"
		depends on SOC_IMX1
		help
		  Say Y here if you want kernel low-level debugging support
		  on i.MX1.

	config DEBUG_IMX23_UART
		bool "i.MX23 Debug UART"
		depends on SOC_IMX23
		help
		  Say Y here if you want kernel low-level debugging support
		  on i.MX23.

	config DEBUG_IMX25_UART
		bool "i.MX25 Debug UART"
		depends on SOC_IMX25
		help
		  Say Y here if you want kernel low-level debugging support
		  on i.MX25.

	config DEBUG_IMX21_IMX27_UART
		bool "i.MX21 and i.MX27 Debug UART"
		depends on SOC_IMX21 || SOC_IMX27
		help
		  Say Y here if you want kernel low-level debugging support
		  on i.MX21 or i.MX27.

	config DEBUG_IMX28_UART
		bool "i.MX28 Debug UART"
		depends on SOC_IMX28
		help
		  Say Y here if you want kernel low-level debugging support
		  on i.MX28.

	config DEBUG_IMX31_IMX35_UART
		bool "i.MX31 and i.MX35 Debug UART"
		depends on SOC_IMX31 || SOC_IMX35
		help
		  Say Y here if you want kernel low-level debugging support
		  on i.MX31 or i.MX35.

	config DEBUG_IMX51_UART
		bool "i.MX51 Debug UART"
		depends on SOC_IMX51
		help
		  Say Y here if you want kernel low-level debugging support
		  on i.MX51.

	config DEBUG_IMX50_IMX53_UART
		bool "i.MX50 and i.MX53 Debug UART"
		depends on SOC_IMX50 || SOC_IMX53
		help
		  Say Y here if you want kernel low-level debugging support
		  on i.MX50 or i.MX53.

	config DEBUG_IMX6Q_UART2
		bool "i.MX6Q Debug UART2"
		depends on SOC_IMX6Q
		help
		  Say Y here if you want kernel low-level debugging support
		  on i.MX6Q UART2. This is correct for e.g. the SabreLite
                  board.

	config DEBUG_IMX6Q_UART4
		bool "i.MX6Q Debug UART4"
		depends on SOC_IMX6Q
		help
		  Say Y here if you want kernel low-level debugging support
		  on i.MX6Q UART4.

	config DEBUG_MMP_UART2
		bool "Kernel low-level debugging message via MMP UART2"
		depends on ARCH_MMP
		help
		  Say Y here if you want kernel low-level debugging support
		  on MMP UART2.

	config DEBUG_MMP_UART3
		bool "Kernel low-level debugging message via MMP UART3"
		depends on ARCH_MMP
		help
		  Say Y here if you want kernel low-level debugging support
		  on MMP UART3.

	config DEBUG_MSM_UART1
		bool "Kernel low-level debugging messages via MSM UART1"
		depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
		help
		  Say Y here if you want the debug print routines to direct
		  their output to the first serial port on MSM devices.

	config DEBUG_MSM_UART2
		bool "Kernel low-level debugging messages via MSM UART2"
		depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
		help
		  Say Y here if you want the debug print routines to direct
		  their output to the second serial port on MSM devices.

	config DEBUG_MSM_UART3
		bool "Kernel low-level debugging messages via MSM UART3"
		depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
		help
		  Say Y here if you want the debug print routines to direct
		  their output to the third serial port on MSM devices.

	config DEBUG_MSM8660_UART
		bool "Kernel low-level debugging messages via MSM 8660 UART"
		depends on ARCH_MSM8X60
		select MSM_HAS_DEBUG_UART_HS
		help
		  Say Y here if you want the debug print routines to direct
		  their output to the serial port on MSM 8660 devices.

	config DEBUG_MSM8960_UART
		bool "Kernel low-level debugging messages via MSM 8960 UART"
		depends on ARCH_MSM8960
		select MSM_HAS_DEBUG_UART_HS
		help
		  Say Y here if you want the debug print routines to direct
		  their output to the serial port on MSM 8960 devices.

	config DEBUG_MVEBU_UART
		bool "Kernel low-level debugging messages via MVEBU UART"
		depends on ARCH_MVEBU
		help
		  Say Y here if you want kernel low-level debugging support
		  on MVEBU based platforms.

	config DEBUG_PICOXCELL_UART
		depends on ARCH_PICOXCELL
		bool "Use PicoXcell UART for low-level debug"
		help
		  Say Y here if you want kernel low-level debugging support
		  on PicoXcell based platforms.

	config DEBUG_REALVIEW_STD_PORT
		bool "RealView Default UART"
		depends on ARCH_REALVIEW
		help
		  Say Y here if you want the debug print routines to direct
		  their output to the serial port on RealView EB, PB11MP, PBA8
		  and PBX platforms.

	config DEBUG_REALVIEW_PB1176_PORT
		bool "RealView PB1176 UART"
		depends on MACH_REALVIEW_PB1176
		help
		  Say Y here if you want the debug print routines to direct
		  their output to the standard serial port on the RealView
		  PB1176 platform.

	config DEBUG_S3C_UART0
		depends on PLAT_SAMSUNG
		bool "Use S3C UART 0 for low-level debug"
		help
		  Say Y here if you want the debug print routines to direct
		  their output to UART 0. The port must have been initialised
		  by the boot-loader before use.

		  The uncompressor code port configuration is now handled
		  by CONFIG_S3C_LOWLEVEL_UART_PORT.

	config DEBUG_S3C_UART1
		depends on PLAT_SAMSUNG
		bool "Use S3C UART 1 for low-level debug"
		help
		  Say Y here if you want the debug print routines to direct
		  their output to UART 1. The port must have been initialised
		  by the boot-loader before use.

		  The uncompressor code port configuration is now handled
		  by CONFIG_S3C_LOWLEVEL_UART_PORT.

	config DEBUG_S3C_UART2
		depends on PLAT_SAMSUNG
		bool "Use S3C UART 2 for low-level debug"
		help
		  Say Y here if you want the debug print routines to direct
		  their output to UART 2. The port must have been initialised
		  by the boot-loader before use.

		  The uncompressor code port configuration is now handled
		  by CONFIG_S3C_LOWLEVEL_UART_PORT.

	config DEBUG_SOCFPGA_UART
		depends on ARCH_SOCFPGA
		bool "Use SOCFPGA UART for low-level debug"
		help
		  Say Y here if you want kernel low-level debugging support
		  on SOCFPGA based platforms.

	config DEBUG_VEXPRESS_UART0_DETECT
		bool "Autodetect UART0 on Versatile Express Cortex-A core tiles"
		depends on ARCH_VEXPRESS && CPU_CP15_MMU
		help
		  This option enables a simple heuristic which tries to determine
		  the motherboard's memory map variant (original or RS1) and then
		  choose the relevant UART0 base address.

		  Note that this will only work with standard A-class core tiles,
		  and may fail with non-standard SMM or custom software models.

	config DEBUG_VEXPRESS_UART0_CA9
		bool "Use PL011 UART0 at 0x10009000 (V2P-CA9 core tile)"
		depends on ARCH_VEXPRESS
		help
		  This option selects UART0 at 0x10009000. Except for custom models,
		  this applies only to the V2P-CA9 tile.

	config DEBUG_VEXPRESS_UART0_RS1
		bool "Use PL011 UART0 at 0x1c090000 (RS1 complaint tiles)"
		depends on ARCH_VEXPRESS
		help
		  This option selects UART0 at 0x1c090000. This applies to most
		  of the tiles using the RS1 memory map, including all new A-class
		  core tiles, FPGA-based SMMs and software models.

	config DEBUG_LL_UART_NONE
		bool "No low-level debugging UART"
		depends on !ARCH_MULTIPLATFORM
		help
		  Say Y here if your platform doesn't provide a UART option
		  below. This relies on your platform choosing the right UART
		  definition internally in order for low-level debugging to
		  work.

	config DEBUG_ICEDCC
		bool "Kernel low-level debugging via EmbeddedICE DCC channel"
		help
		  Say Y here if you want the debug print routines to direct
		  their output to the EmbeddedICE macrocell's DCC channel using
		  co-processor 14. This is known to work on the ARM9 style ICE
		  channel and on the XScale with the PEEDI.

		  Note that the system will appear to hang during boot if there
		  is nothing connected to read from the DCC.

	config DEBUG_SEMIHOSTING
		bool "Kernel low-level debug output via semihosting I/O"
		help
		  Semihosting enables code running on an ARM target to use
		  the I/O facilities on a host debugger/emulator through a
		  simple SVC call. The host debugger or emulator must have
		  semihosting enabled for the special svc call to be trapped
		  otherwise the kernel will crash.

		  This is known to work with OpenOCD, as well as
		  ARM's Fast Models, or any other controlling environment
		  that implements semihosting.

		  For more details about semihosting, please see
		  chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.

endchoice

config DEBUG_LL_INCLUDE
	string
	default "debug/icedcc.S" if DEBUG_ICEDCC
	default "debug/highbank.S" if DEBUG_HIGHBANK_UART
	default "debug/mvebu.S" if DEBUG_MVEBU_UART
	default "debug/picoxcell.S" if DEBUG_PICOXCELL_UART
	default "debug/socfpga.S" if DEBUG_SOCFPGA_UART
	default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT || \
		DEBUG_VEXPRESS_UART0_CA9 || DEBUG_VEXPRESS_UART0_RS1
	default "mach/debug-macro.S"

config EARLY_PRINTK
	bool "Early printk"
	depends on DEBUG_LL
	help
	  Say Y here if you want to have an early console using the
	  kernel low-level debugging functions. Add earlyprintk to your
	  kernel parameters to enable this console.

config OC_ETM
	bool "On-chip ETM and ETB"
	depends on ARM_AMBA
	help
	  Enables the on-chip embedded trace macrocell and embedded trace
	  buffer driver that will allow you to collect traces of the
	  kernel code.

config ARM_KPROBES_TEST
	tristate "Kprobes test module"
	depends on KPROBES && MODULES
	help
	  Perform tests of kprobes API and instruction set simulation.

config PID_IN_CONTEXTIDR
	bool "Write the current PID to the CONTEXTIDR register"
	depends on CPU_COPY_V6
	help
	  Enabling this option causes the kernel to write the current PID to
	  the PROCID field of the CONTEXTIDR register, at the expense of some
	  additional instructions during context switch. Say Y here only if you
	  are planning to use hardware trace tools with this kernel.

endmenu
Commit	Line	Data
1da177e4 LT	1	menu "Kernel hacking"
	2
	3	source "lib/Kconfig.debug"
	4
087aaffc NP	5	config STRICT_DEVMEM
	6	bool "Filter access to /dev/mem"
	7	depends on MMU
	8	---help---
	9	If this option is disabled, you allow userspace (root) access to all
	10	of memory, including kernel and userspace memory. Accidental
	11	access to this is obviously disastrous, but specific access can
	12	be used by people debugging the kernel.
	13
	14	If this option is switched on, the /dev/mem file only allows
	15	userspace access to memory mapped peripherals.
	16
	17	If in doubt, say Y.
	18
adf8b37b	19	# RMK wants arm kernels compiled with frame pointers or stack unwinding.
1da177e4 LT	20	# If you know what you are doing and are willing to live without stack
	21	# traces, you can get a slightly smaller kernel by setting this option to
	22	# n, but then RMK will have to kill you ;).
	23	config FRAME_POINTER
	24	bool
16c79651	25	depends on !THUMB2_KERNEL
0e341af8	26	default y if !ARM_UNWIND \|\| FUNCTION_GRAPH_TRACER
1da177e4 LT	27	help
1da177e4 LT	28	If you say N here, the resulting kernel will be slightly smaller and
adf8b37b CM	29	faster. However, if neither FRAME_POINTER nor ARM_UNWIND are enabled,
	30	when a problem occurs with the kernel, the information that is
	31	reported is severely limited.
	32
	33	config ARM_UNWIND
4a50bfe3	34	bool "Enable stack unwinding support (EXPERIMENTAL)"
adf8b37b CM	35	depends on AEABI && EXPERIMENTAL
	36	default y
	37	help
	38	This option enables stack unwinding support in the kernel
	39	using the information automatically generated by the
	40	compiler. The resulting kernel image is slightly bigger but
	41	the performance is not affected. Currently, this feature
	42	only works with EABI compilers. If unsure say Y.
1da177e4	43
09bfafac RV	44	config OLD_MCOUNT
	45	bool
	46	depends on FUNCTION_TRACER && FRAME_POINTER
	47	default y
	48
1da177e4 LT	49	config DEBUG_USER
	50	bool "Verbose user fault messages"
	51	help
	52	When a user program crashes due to an exception, the kernel can
	53	print a brief message explaining what the problem was. This is
	54	sometimes helpful for debugging but serves no purpose on a
	55	production system. Most people should say N here.
	56
	57	In addition, you need to pass user_debug=N on the kernel command
	58	line to enable this feature. N consists of the sum of:
	59
	60	1 - undefined instruction events
	61	2 - system calls
	62	4 - invalid data aborts
	63	8 - SIGSEGV faults
	64	16 - SIGBUS faults
	65
1da177e4 LT	66	# These options are only for real kernel hackers who want to get their hands dirty.
1da177e4 LT	67	config DEBUG_LL
4f5ef922	68	bool "Kernel low-level debugging functions (read help!)"
1da177e4 LT	69	depends on DEBUG_KERNEL
1da177e4 LT	70	help
35efb606	71	Say Y here to include definitions of printascii, printch, printhex
1da177e4 LT	72	in the kernel. This is helpful if you are debugging code that
	73	executes before the console is initialized.
	74
4f5ef922 WD	75	Note that selecting this option will limit the kernel to a single
	76	UART definition, as specified below. Attempting to boot the kernel
	77	image on a different platform will not work, so this option should
	78	not be enabled for kernels that are intended to be portable.
	79
17916b28 WD	80	choice
	81	prompt "Kernel low-level debugging port"
	82	depends on DEBUG_LL
	83
13079a73 JCPV	84	config AT91_DEBUG_LL_DBGU0
	85	bool "Kernel low-level debugging on rm9200, 9260/9g20, 9261/9g10 and 9rl"
	86	depends on HAVE_AT91_DBGU0
	87
	88	config AT91_DEBUG_LL_DBGU1
9918ceaf	89	bool "Kernel low-level debugging on 9263 and 9g45"
13079a73 JCPV	90	depends on HAVE_AT91_DBGU1
13079a73 JCPV	91
164acf96 SB	92	config DEBUG_CLPS711X_UART1
	93	bool "Kernel low-level debugging messages via UART1"
	94	depends on ARCH_CLPS711X
	95	help
	96	Say Y here if you want the debug print routines to direct
	97	their output to the first serial port on these devices.
17916b28 WD	98
	99	config DEBUG_CLPS711X_UART2
	100	bool "Kernel low-level debugging messages via UART2"
	101	depends on ARCH_CLPS711X
	102	help
	103	Say Y here if you want the debug print routines to direct
	104	their output to the second serial port on these devices.
17916b28	105
477099f1 UKK	106	config DEBUG_DAVINCI_DA8XX_UART1
	107	bool "Kernel low-level debugging on DaVinci DA8XX using UART1"
	108	depends on ARCH_DAVINCI_DA8XX
	109	help
	110	Say Y here if you want the debug print routines to direct
	111	their output to UART1 serial port on DaVinci DA8XX devices.
	112
	113	config DEBUG_DAVINCI_DA8XX_UART2
	114	bool "Kernel low-level debugging on DaVinci DA8XX using UART2"
	115	depends on ARCH_DAVINCI_DA8XX
	116	help
	117	Say Y here if you want the debug print routines to direct
	118	their output to UART2 serial port on DaVinci DA8XX devices.
	119
	120	config DEBUG_DAVINCI_DMx_UART0
	121	bool "Kernel low-level debugging on DaVinci DMx using UART0"
	122	depends on ARCH_DAVINCI_DMx
	123	help
	124	Say Y here if you want the debug print routines to direct
	125	their output to UART0 serial port on DaVinci DMx devices.
	126
	127	config DEBUG_DAVINCI_TNETV107X_UART1
	128	bool "Kernel low-level debugging on DaVinci TNETV107x using UART1"
	129	depends on ARCH_DAVINCI_TNETV107X
	130	help
	131	Say Y here if you want the debug print routines to direct
	132	their output to UART1 serial port on DaVinci TNETV107X
	133	devices.
	134
e76f4750 RK	135	config DEBUG_DC21285_PORT
	136	bool "Kernel low-level debugging messages via footbridge serial port"
	137	depends on FOOTBRIDGE
	138	help
	139	Say Y here if you want the debug print routines to direct
	140	their output to the serial port in the DC21285 (Footbridge).
	141
	142	config DEBUG_FOOTBRIDGE_COM1
	143	bool "Kernel low-level debugging messages via footbridge 8250 at PCI COM1"
	144	depends on FOOTBRIDGE
	145	help
	146	Say Y here if you want the debug print routines to direct
	147	their output to the 8250 at PCI COM1.
	148
220e6cf7 RH	149	config DEBUG_HIGHBANK_UART
	150	bool "Kernel low-level debugging messages via Highbank UART"
	151	depends on ARCH_HIGHBANK
	152	help
	153	Say Y here if you want the debug print routines to direct
	154	their output to the UART on Highbank based devices.
	155
f350b861 SG	156	config DEBUG_IMX1_UART
	157	bool "i.MX1 Debug UART"
	158	depends on SOC_IMX1
	159	help
	160	Say Y here if you want kernel low-level debugging support
	161	on i.MX1.
	162
	163	config DEBUG_IMX23_UART
	164	bool "i.MX23 Debug UART"
	165	depends on SOC_IMX23
	166	help
	167	Say Y here if you want kernel low-level debugging support
	168	on i.MX23.
	169
	170	config DEBUG_IMX25_UART
	171	bool "i.MX25 Debug UART"
	172	depends on SOC_IMX25
	173	help
	174	Say Y here if you want kernel low-level debugging support
	175	on i.MX25.
	176
	177	config DEBUG_IMX21_IMX27_UART
	178	bool "i.MX21 and i.MX27 Debug UART"
	179	depends on SOC_IMX21 \|\| SOC_IMX27
	180	help
	181	Say Y here if you want kernel low-level debugging support
	182	on i.MX21 or i.MX27.
	183
	184	config DEBUG_IMX28_UART
	185	bool "i.MX28 Debug UART"
	186	depends on SOC_IMX28
	187	help
	188	Say Y here if you want kernel low-level debugging support
	189	on i.MX28.
	190
	191	config DEBUG_IMX31_IMX35_UART
	192	bool "i.MX31 and i.MX35 Debug UART"
	193	depends on SOC_IMX31 \|\| SOC_IMX35
	194	help
	195	Say Y here if you want kernel low-level debugging support
	196	on i.MX31 or i.MX35.
	197
	198	config DEBUG_IMX51_UART
	199	bool "i.MX51 Debug UART"
	200	depends on SOC_IMX51
	201	help
	202	Say Y here if you want kernel low-level debugging support
	203	on i.MX51.
	204
	205	config DEBUG_IMX50_IMX53_UART
	206	bool "i.MX50 and i.MX53 Debug UART"
	207	depends on SOC_IMX50 \|\| SOC_IMX53
	208	help
	209	Say Y here if you want kernel low-level debugging support
	210	on i.MX50 or i.MX53.
	211
785d7fab DB	212	config DEBUG_IMX6Q_UART2
	213	bool "i.MX6Q Debug UART2"
	214	depends on SOC_IMX6Q
	215	help
	216	Say Y here if you want kernel low-level debugging support
	217	on i.MX6Q UART2. This is correct for e.g. the SabreLite
	218	board.
	219
cdaf29cf DB	220	config DEBUG_IMX6Q_UART4
cdaf29cf DB	221	bool "i.MX6Q Debug UART4"
bac89d75 SG	222	depends on SOC_IMX6Q
	223	help
	224	Say Y here if you want kernel low-level debugging support
cdaf29cf	225	on i.MX6Q UART4.
bac89d75	226
fa4cd2a8 HZ	227	config DEBUG_MMP_UART2
	228	bool "Kernel low-level debugging message via MMP UART2"
	229	depends on ARCH_MMP
	230	help
	231	Say Y here if you want kernel low-level debugging support
	232	on MMP UART2.
	233
	234	config DEBUG_MMP_UART3
	235	bool "Kernel low-level debugging message via MMP UART3"
	236	depends on ARCH_MMP
	237	help
	238	Say Y here if you want kernel low-level debugging support
	239	on MMP UART3.
	240
e76f4750 RK	241	config DEBUG_MSM_UART1
	242	bool "Kernel low-level debugging messages via MSM UART1"
	243	depends on ARCH_MSM7X00A \|\| ARCH_MSM7X30 \|\| ARCH_QSD8X50
952aeeb2 WD	244	help
952aeeb2 WD	245	Say Y here if you want the debug print routines to direct
e76f4750	246	their output to the first serial port on MSM devices.
952aeeb2	247
e76f4750 RK	248	config DEBUG_MSM_UART2
	249	bool "Kernel low-level debugging messages via MSM UART2"
	250	depends on ARCH_MSM7X00A \|\| ARCH_MSM7X30 \|\| ARCH_QSD8X50
952aeeb2 WD	251	help
952aeeb2 WD	252	Say Y here if you want the debug print routines to direct
e76f4750	253	their output to the second serial port on MSM devices.
952aeeb2	254
e76f4750 RK	255	config DEBUG_MSM_UART3
	256	bool "Kernel low-level debugging messages via MSM UART3"
	257	depends on ARCH_MSM7X00A \|\| ARCH_MSM7X30 \|\| ARCH_QSD8X50
	258	help
	259	Say Y here if you want the debug print routines to direct
	260	their output to the third serial port on MSM devices.
952aeeb2	261
e76f4750 RK	262	config DEBUG_MSM8660_UART
	263	bool "Kernel low-level debugging messages via MSM 8660 UART"
	264	depends on ARCH_MSM8X60
	265	select MSM_HAS_DEBUG_UART_HS
952aeeb2 WD	266	help
952aeeb2 WD	267	Say Y here if you want the debug print routines to direct
e76f4750	268	their output to the serial port on MSM 8660 devices.
952aeeb2	269
e76f4750 RK	270	config DEBUG_MSM8960_UART
	271	bool "Kernel low-level debugging messages via MSM 8960 UART"
	272	depends on ARCH_MSM8960
	273	select MSM_HAS_DEBUG_UART_HS
	274	help
	275	Say Y here if you want the debug print routines to direct
	276	their output to the serial port on MSM 8960 devices.
952aeeb2	277
bfd5af99 RH	278	config DEBUG_MVEBU_UART
	279	bool "Kernel low-level debugging messages via MVEBU UART"
	280	depends on ARCH_MVEBU
	281	help
	282	Say Y here if you want kernel low-level debugging support
	283	on MVEBU based platforms.
	284
59bba2a9 RH	285	config DEBUG_PICOXCELL_UART
	286	depends on ARCH_PICOXCELL
	287	bool "Use PicoXcell UART for low-level debug"
	288	help
	289	Say Y here if you want kernel low-level debugging support
	290	on PicoXcell based platforms.
	291
1285b8f8 WD	292	config DEBUG_REALVIEW_STD_PORT
	293	bool "RealView Default UART"
	294	depends on ARCH_REALVIEW
	295	help
	296	Say Y here if you want the debug print routines to direct
	297	their output to the serial port on RealView EB, PB11MP, PBA8
	298	and PBX platforms.
	299
	300	config DEBUG_REALVIEW_PB1176_PORT
	301	bool "RealView PB1176 UART"
	302	depends on MACH_REALVIEW_PB1176
	303	help
	304	Say Y here if you want the debug print routines to direct
	305	their output to the standard serial port on the RealView
	306	PB1176 platform.
	307
e76f4750 RK	308	config DEBUG_S3C_UART0
	309	depends on PLAT_SAMSUNG
	310	bool "Use S3C UART 0 for low-level debug"
650e3f0d SB	311	help
650e3f0d SB	312	Say Y here if you want the debug print routines to direct
e76f4750 RK	313	their output to UART 0. The port must have been initialised
e76f4750 RK	314	by the boot-loader before use.
650e3f0d	315
e76f4750 RK	316	The uncompressor code port configuration is now handled
	317	by CONFIG_S3C_LOWLEVEL_UART_PORT.
	318
	319	config DEBUG_S3C_UART1
	320	depends on PLAT_SAMSUNG
	321	bool "Use S3C UART 1 for low-level debug"
650e3f0d SB	322	help
650e3f0d SB	323	Say Y here if you want the debug print routines to direct
e76f4750 RK	324	their output to UART 1. The port must have been initialised
e76f4750 RK	325	by the boot-loader before use.
650e3f0d	326
e76f4750 RK	327	The uncompressor code port configuration is now handled
	328	by CONFIG_S3C_LOWLEVEL_UART_PORT.
	329
	330	config DEBUG_S3C_UART2
	331	depends on PLAT_SAMSUNG
	332	bool "Use S3C UART 2 for low-level debug"
650e3f0d SB	333	help
650e3f0d SB	334	Say Y here if you want the debug print routines to direct
e76f4750 RK	335	their output to UART 2. The port must have been initialised
e76f4750 RK	336	by the boot-loader before use.
650e3f0d	337
e76f4750 RK	338	The uncompressor code port configuration is now handled
	339	by CONFIG_S3C_LOWLEVEL_UART_PORT.
	340
6111bf7c RH	341	config DEBUG_SOCFPGA_UART
	342	depends on ARCH_SOCFPGA
	343	bool "Use SOCFPGA UART for low-level debug"
	344	help
	345	Say Y here if you want kernel low-level debugging support
	346	on SOCFPGA based platforms.
	347
1b820eaf PM	348	config DEBUG_VEXPRESS_UART0_DETECT
	349	bool "Autodetect UART0 on Versatile Express Cortex-A core tiles"
	350	depends on ARCH_VEXPRESS && CPU_CP15_MMU
	351	help
	352	This option enables a simple heuristic which tries to determine
	353	the motherboard's memory map variant (original or RS1) and then
	354	choose the relevant UART0 base address.
	355
	356	Note that this will only work with standard A-class core tiles,
	357	and may fail with non-standard SMM or custom software models.
	358
	359	config DEBUG_VEXPRESS_UART0_CA9
	360	bool "Use PL011 UART0 at 0x10009000 (V2P-CA9 core tile)"
	361	depends on ARCH_VEXPRESS
	362	help
	363	This option selects UART0 at 0x10009000. Except for custom models,
	364	this applies only to the V2P-CA9 tile.
	365
	366	config DEBUG_VEXPRESS_UART0_RS1
	367	bool "Use PL011 UART0 at 0x1c090000 (RS1 complaint tiles)"
	368	depends on ARCH_VEXPRESS
	369	help
	370	This option selects UART0 at 0x1c090000. This applies to most
	371	of the tiles using the RS1 memory map, including all new A-class
	372	core tiles, FPGA-based SMMs and software models.
	373
e76f4750 RK	374	config DEBUG_LL_UART_NONE
e76f4750 RK	375	bool "No low-level debugging UART"
387798b3	376	depends on !ARCH_MULTIPLATFORM
a3d3ef9d	377	help
e76f4750 RK	378	Say Y here if your platform doesn't provide a UART option
	379	below. This relies on your platform choosing the right UART
	380	definition internally in order for low-level debugging to
	381	work.
a3d3ef9d	382
e76f4750 RK	383	config DEBUG_ICEDCC
e76f4750 RK	384	bool "Kernel low-level debugging via EmbeddedICE DCC channel"
a3d3ef9d SB	385	help
a3d3ef9d SB	386	Say Y here if you want the debug print routines to direct
e76f4750 RK	387	their output to the EmbeddedICE macrocell's DCC channel using
	388	co-processor 14. This is known to work on the ARM9 style ICE
	389	channel and on the XScale with the PEEDI.
	390
	391	Note that the system will appear to hang during boot if there
	392	is nothing connected to read from the DCC.
a3d3ef9d	393
b0df8986	394	config DEBUG_SEMIHOSTING
62194bda	395	bool "Kernel low-level debug output via semihosting I/O"
650e3f0d	396	help
b0df8986 RK	397	Semihosting enables code running on an ARM target to use
b0df8986 RK	398	the I/O facilities on a host debugger/emulator through a
62194bda	399	simple SVC call. The host debugger or emulator must have
b0df8986 RK	400	semihosting enabled for the special svc call to be trapped
b0df8986 RK	401	otherwise the kernel will crash.
650e3f0d	402
62194bda	403	This is known to work with OpenOCD, as well as
b0df8986 RK	404	ARM's Fast Models, or any other controlling environment
b0df8986 RK	405	that implements semihosting.
a3d3ef9d	406
b0df8986 RK	407	For more details about semihosting, please see
b0df8986 RK	408	chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.
a3d3ef9d	409
17916b28 WD	410	endchoice
17916b28 WD	411
91a9fec0 RH	412	config DEBUG_LL_INCLUDE
	413	string
	414	default "debug/icedcc.S" if DEBUG_ICEDCC
2e9bb084	415	default "debug/highbank.S" if DEBUG_HIGHBANK_UART
bfd5af99	416	default "debug/mvebu.S" if DEBUG_MVEBU_UART
59bba2a9	417	default "debug/picoxcell.S" if DEBUG_PICOXCELL_UART
6111bf7c	418	default "debug/socfpga.S" if DEBUG_SOCFPGA_UART
fa04e4db RH	419	default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT \|\| \
fa04e4db RH	420	DEBUG_VEXPRESS_UART0_CA9 \|\| DEBUG_VEXPRESS_UART0_RS1
91a9fec0 RH	421	default "mach/debug-macro.S"
91a9fec0 RH	422
93fd03a8 CM	423	config EARLY_PRINTK
	424	bool "Early printk"
	425	depends on DEBUG_LL
	426	help
	427	Say Y here if you want to have an early console using the
	428	kernel low-level debugging functions. Add earlyprintk to your
	429	kernel parameters to enable this console.
	430
c5d6c770 AS	431	config OC_ETM
c5d6c770 AS	432	bool "On-chip ETM and ETB"
53eebb0d	433	depends on ARM_AMBA
c5d6c770 AS	434	help
	435	Enables the on-chip embedded trace macrocell and embedded trace
	436	buffer driver that will allow you to collect traces of the
	437	kernel code.
	438
4189bc71 JM	439	config ARM_KPROBES_TEST
	440	tristate "Kprobes test module"
	441	depends on KPROBES && MODULES
	442	help
	443	Perform tests of kprobes API and instruction set simulation.
	444
575320d6 WD	445	config PID_IN_CONTEXTIDR
	446	bool "Write the current PID to the CONTEXTIDR register"
	447	depends on CPU_COPY_V6
	448	help
	449	Enabling this option causes the kernel to write the current PID to
	450	the PROCID field of the CONTEXTIDR register, at the expense of some
	451	additional instructions during context switch. Say Y here only if you
	452	are planning to use hardware trace tools with this kernel.
	453
1da177e4	454	endmenu