[linux-block.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_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_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_LL_UART_NONE
		bool "No low-level debugging UART"
		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"
		help
		  Semihosting enables code running on an ARM target to use
		  the I/O facilities on a host debugger/emulator through a
		  simple SVC calls. 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 wellas
		  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 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.

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
e76f4750 RK	227	config DEBUG_MSM_UART1
	228	bool "Kernel low-level debugging messages via MSM UART1"
	229	depends on ARCH_MSM7X00A \|\| ARCH_MSM7X30 \|\| ARCH_QSD8X50
952aeeb2 WD	230	help
952aeeb2 WD	231	Say Y here if you want the debug print routines to direct
e76f4750	232	their output to the first serial port on MSM devices.
952aeeb2	233
e76f4750 RK	234	config DEBUG_MSM_UART2
	235	bool "Kernel low-level debugging messages via MSM UART2"
	236	depends on ARCH_MSM7X00A \|\| ARCH_MSM7X30 \|\| ARCH_QSD8X50
952aeeb2 WD	237	help
952aeeb2 WD	238	Say Y here if you want the debug print routines to direct
e76f4750	239	their output to the second serial port on MSM devices.
952aeeb2	240
e76f4750 RK	241	config DEBUG_MSM_UART3
	242	bool "Kernel low-level debugging messages via MSM UART3"
	243	depends on ARCH_MSM7X00A \|\| ARCH_MSM7X30 \|\| ARCH_QSD8X50
	244	help
	245	Say Y here if you want the debug print routines to direct
	246	their output to the third serial port on MSM devices.
952aeeb2	247
e76f4750 RK	248	config DEBUG_MSM8660_UART
	249	bool "Kernel low-level debugging messages via MSM 8660 UART"
	250	depends on ARCH_MSM8X60
	251	select MSM_HAS_DEBUG_UART_HS
952aeeb2 WD	252	help
952aeeb2 WD	253	Say Y here if you want the debug print routines to direct
e76f4750	254	their output to the serial port on MSM 8660 devices.
952aeeb2	255
e76f4750 RK	256	config DEBUG_MSM8960_UART
	257	bool "Kernel low-level debugging messages via MSM 8960 UART"
	258	depends on ARCH_MSM8960
	259	select MSM_HAS_DEBUG_UART_HS
	260	help
	261	Say Y here if you want the debug print routines to direct
	262	their output to the serial port on MSM 8960 devices.
952aeeb2	263
1285b8f8 WD	264	config DEBUG_REALVIEW_STD_PORT
	265	bool "RealView Default UART"
	266	depends on ARCH_REALVIEW
	267	help
	268	Say Y here if you want the debug print routines to direct
	269	their output to the serial port on RealView EB, PB11MP, PBA8
	270	and PBX platforms.
	271
	272	config DEBUG_REALVIEW_PB1176_PORT
	273	bool "RealView PB1176 UART"
	274	depends on MACH_REALVIEW_PB1176
	275	help
	276	Say Y here if you want the debug print routines to direct
	277	their output to the standard serial port on the RealView
	278	PB1176 platform.
	279
e76f4750 RK	280	config DEBUG_S3C_UART0
	281	depends on PLAT_SAMSUNG
	282	bool "Use S3C UART 0 for low-level debug"
650e3f0d SB	283	help
650e3f0d SB	284	Say Y here if you want the debug print routines to direct
e76f4750 RK	285	their output to UART 0. The port must have been initialised
e76f4750 RK	286	by the boot-loader before use.
650e3f0d	287
e76f4750 RK	288	The uncompressor code port configuration is now handled
	289	by CONFIG_S3C_LOWLEVEL_UART_PORT.
	290
	291	config DEBUG_S3C_UART1
	292	depends on PLAT_SAMSUNG
	293	bool "Use S3C UART 1 for low-level debug"
650e3f0d SB	294	help
650e3f0d SB	295	Say Y here if you want the debug print routines to direct
e76f4750 RK	296	their output to UART 1. The port must have been initialised
e76f4750 RK	297	by the boot-loader before use.
650e3f0d	298
e76f4750 RK	299	The uncompressor code port configuration is now handled
	300	by CONFIG_S3C_LOWLEVEL_UART_PORT.
	301
	302	config DEBUG_S3C_UART2
	303	depends on PLAT_SAMSUNG
	304	bool "Use S3C UART 2 for low-level debug"
650e3f0d SB	305	help
650e3f0d SB	306	Say Y here if you want the debug print routines to direct
e76f4750 RK	307	their output to UART 2. The port must have been initialised
e76f4750 RK	308	by the boot-loader before use.
650e3f0d	309
e76f4750 RK	310	The uncompressor code port configuration is now handled
	311	by CONFIG_S3C_LOWLEVEL_UART_PORT.
	312
	313	config DEBUG_LL_UART_NONE
	314	bool "No low-level debugging UART"
a3d3ef9d	315	help
e76f4750 RK	316	Say Y here if your platform doesn't provide a UART option
	317	below. This relies on your platform choosing the right UART
	318	definition internally in order for low-level debugging to
	319	work.
a3d3ef9d	320
e76f4750 RK	321	config DEBUG_ICEDCC
e76f4750 RK	322	bool "Kernel low-level debugging via EmbeddedICE DCC channel"
a3d3ef9d SB	323	help
a3d3ef9d SB	324	Say Y here if you want the debug print routines to direct
e76f4750 RK	325	their output to the EmbeddedICE macrocell's DCC channel using
	326	co-processor 14. This is known to work on the ARM9 style ICE
	327	channel and on the XScale with the PEEDI.
	328
	329	Note that the system will appear to hang during boot if there
	330	is nothing connected to read from the DCC.
a3d3ef9d	331
b0df8986 RK	332	config DEBUG_SEMIHOSTING
b0df8986 RK	333	bool "Kernel low-level debug output via semihosting I"
650e3f0d	334	help
b0df8986 RK	335	Semihosting enables code running on an ARM target to use
	336	the I/O facilities on a host debugger/emulator through a
	337	simple SVC calls. The host debugger or emulator must have
	338	semihosting enabled for the special svc call to be trapped
	339	otherwise the kernel will crash.
650e3f0d	340
b0df8986 RK	341	This is known to work with OpenOCD, as wellas
	342	ARM's Fast Models, or any other controlling environment
	343	that implements semihosting.
a3d3ef9d	344
b0df8986 RK	345	For more details about semihosting, please see
b0df8986 RK	346	chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.
a3d3ef9d	347
17916b28 WD	348	endchoice
17916b28 WD	349
93fd03a8 CM	350	config EARLY_PRINTK
	351	bool "Early printk"
	352	depends on DEBUG_LL
	353	help
	354	Say Y here if you want to have an early console using the
	355	kernel low-level debugging functions. Add earlyprintk to your
	356	kernel parameters to enable this console.
	357
c5d6c770 AS	358	config OC_ETM
c5d6c770 AS	359	bool "On-chip ETM and ETB"
53eebb0d	360	depends on ARM_AMBA
c5d6c770 AS	361	help
	362	Enables the on-chip embedded trace macrocell and embedded trace
	363	buffer driver that will allow you to collect traces of the
	364	kernel code.
	365
4189bc71 JM	366	config ARM_KPROBES_TEST
	367	tristate "Kprobes test module"
	368	depends on KPROBES && MODULES
	369	help
	370	Perform tests of kprobes API and instruction set simulation.
	371
1da177e4	372	endmenu