[linux-block.git] / arch / mips / Kconfig.debug

# SPDX-License-Identifier: GPL-2.0

config EARLY_PRINTK
	bool "Early printk" if EXPERT
	depends on SYS_HAS_EARLY_PRINTK
	default y
	help
	  This option enables special console drivers which allow the kernel
	  to print messages very early in the bootup process.

	  This is useful for kernel debugging when your machine crashes very
	  early before the console code is initialized. For normal operation,
	  it is not recommended because it looks ugly on some machines and
	  doesn't cooperate with an X server. You should normally say N here,
	  unless you want to debug such a crash.

config EARLY_PRINTK_8250
	bool
	depends on EARLY_PRINTK && USE_GENERIC_EARLY_PRINTK_8250
	default y
	help
	  "8250/16550 and compatible serial early printk driver"
	  If you say Y here, it will be possible to use a 8250/16550 serial
	  port as the boot console.

config USE_GENERIC_EARLY_PRINTK_8250
	bool

config CMDLINE_BOOL
	bool "Built-in kernel command line"
	help
	  For most systems, it is firmware or second stage bootloader that
	  by default specifies the kernel command line options.  However,
	  it might be necessary or advantageous to either override the
	  default kernel command line or add a few extra options to it.
	  For such cases, this option allows you to hardcode your own
	  command line options directly into the kernel.  For that, you
	  should choose 'Y' here, and fill in the extra boot arguments
	  in CONFIG_CMDLINE.

	  The built-in options will be concatenated to the default command
	  line if CMDLINE_OVERRIDE is set to 'N'. Otherwise, the default
	  command line will be ignored and replaced by the built-in string.

	  Most MIPS systems will normally expect 'N' here and rely upon
	  the command line from the firmware or the second-stage bootloader.

config CMDLINE
	string "Default kernel command string"
	depends on CMDLINE_BOOL
	help
	  On some platforms, there is currently no way for the boot loader to
	  pass arguments to the kernel.  For these platforms, and for the cases
	  when you want to add some extra options to the command line or ignore
	  the default command line, you can supply some command-line options at
	  build time by entering them here.  In other cases you can specify
	  kernel args so that you don't have to set them up in board prom
	  initialization routines.

	  For more information, see the CMDLINE_BOOL and CMDLINE_OVERRIDE
	  options.

config CMDLINE_OVERRIDE
	bool "Built-in command line overrides firmware arguments"
	depends on CMDLINE_BOOL
	help
	  By setting this option to 'Y' you will have your kernel ignore
	  command line arguments from firmware or second stage bootloader.
	  Instead, the built-in command line will be used exclusively.

	  Normally, you will choose 'N' here.

config SB1XXX_CORELIS
	bool "Corelis Debugger"
	depends on SIBYTE_SB1xxx_SOC
	select DEBUG_KERNEL if !COMPILE_TEST
	select DEBUG_INFO if !COMPILE_TEST
	help
	  Select compile flags that produce code that can be processed by the
	  Corelis mksym utility and UDB Emulator.

config DEBUG_ZBOOT
	bool "Enable compressed kernel support debugging"
	depends on DEBUG_KERNEL && SYS_SUPPORTS_ZBOOT
	default n
	help
	  If you want to add compressed kernel support to a new board, and the
	  board supports uart16550 compatible serial port, please select
	  SYS_SUPPORTS_ZBOOT_UART16550 for your board and enable this option to
	  debug it.

	  If your board doesn't support uart16550 compatible serial port, you
	  can try to select SYS_SUPPORTS_ZBOOT and use the other methods to
	  debug it. for example, add a new serial port support just as
	  arch/mips/boot/compressed/uart-16550.c does.

	  After the compressed kernel support works, please disable this option
	  to reduce the kernel image size and speed up the booting procedure a
	  little.

config ZBOOT_INGENIC_UART
	int "UART to use for compressed kernel debugging"
	depends on DEBUG_ZBOOT && MACH_INGENIC_SOC
	default 0
	range 0 4
	help
	  Specify the UART that should be used for compressed kernel debugging.

config SPINLOCK_TEST
	bool "Enable spinlock timing tests in debugfs"
	depends on DEBUG_FS
	default n
	help
	  Add several files to the debugfs to test spinlock speed.

config SCACHE_DEBUGFS
	bool "L2 cache debugfs entries"
	depends on DEBUG_FS
	help
	  Enable this to allow parts of the L2 cache configuration, such as
	  whether or not prefetching is enabled, to be exposed to userland
	  via debugfs.

	  If unsure, say N.

menuconfig MIPS_CPS_NS16550_BOOL
	bool "CPS SMP NS16550 UART output"
	depends on MIPS_CPS
	help
	  Output debug information via an ns16550 compatible UART if exceptions
	  occur early in the boot process of a secondary core.

if MIPS_CPS_NS16550_BOOL

config MIPS_CPS_NS16550
	def_bool MIPS_CPS_NS16550_BASE != 0

config MIPS_CPS_NS16550_BASE
	hex "UART Base Address"
	default 0x1b0003f8 if MIPS_MALTA
	default 0
	help
	  The base address of the ns16550 compatible UART on which to output
	  debug information from the early stages of core startup.

	  This is only used if non-zero.

config MIPS_CPS_NS16550_SHIFT
	int "UART Register Shift"
	default 0
	help
	  The number of bits to shift ns16550 register indices by in order to
	  form their addresses. That is, log base 2 of the span between
	  adjacent ns16550 registers in the system.

config MIPS_CPS_NS16550_WIDTH
	int "UART Register Width"
	default 1
	help
	  ns16550 registers width. UART registers IO access methods will be
	  selected in accordance with this parameter. By setting it to 1, 2 or
	  4 UART registers will be accessed by means of lb/sb, lh/sh or lw/sw
	  instructions respectively. Any value not from that set activates
	  lb/sb instructions.

endif # MIPS_CPS_NS16550_BOOL
Commit	Line	Data
b2441318	1	# SPDX-License-Identifier: GPL-2.0
1da177e4	2
4dd92e15	3	config EARLY_PRINTK
6a108a14	4	bool "Early printk" if EXPERT
4dd92e15 RB	5	depends on SYS_HAS_EARLY_PRINTK
	6	default y
	7	help
	8	This option enables special console drivers which allow the kernel
	9	to print messages very early in the bootup process.
	10
	11	This is useful for kernel debugging when your machine crashes very
	12	early before the console code is initialized. For normal operation,
	13	it is not recommended because it looks ugly on some machines and
	14	doesn't cooperate with an X server. You should normally say N here,
	15	unless you want to debug such a crash.
	16
7cd93b89	17	config EARLY_PRINTK_8250
e6086557 RB	18	bool
	19	depends on EARLY_PRINTK && USE_GENERIC_EARLY_PRINTK_8250
	20	default y
7cd93b89	21	help
e6086557	22	"8250/16550 and compatible serial early printk driver"
7cd93b89 YY	23	If you say Y here, it will be possible to use a 8250/16550 serial
	24	port as the boot console.
	25
e6086557 RB	26	config USE_GENERIC_EARLY_PRINTK_8250
	27	bool
	28
6acc7d48 DV	29	config CMDLINE_BOOL
6acc7d48 DV	30	bool "Built-in kernel command line"
6acc7d48 DV	31	help
	32	For most systems, it is firmware or second stage bootloader that
	33	by default specifies the kernel command line options. However,
	34	it might be necessary or advantageous to either override the
	35	default kernel command line or add a few extra options to it.
	36	For such cases, this option allows you to hardcode your own
	37	command line options directly into the kernel. For that, you
	38	should choose 'Y' here, and fill in the extra boot arguments
	39	in CONFIG_CMDLINE.
	40
	41	The built-in options will be concatenated to the default command
	42	line if CMDLINE_OVERRIDE is set to 'N'. Otherwise, the default
	43	command line will be ignored and replaced by the built-in string.
	44
	45	Most MIPS systems will normally expect 'N' here and rely upon
	46	the command line from the firmware or the second-stage bootloader.
	47
1da177e4 LT	48	config CMDLINE
1da177e4 LT	49	string "Default kernel command string"
6acc7d48	50	depends on CMDLINE_BOOL
1da177e4	51	help
3e7f9b82	52	On some platforms, there is currently no way for the boot loader to
6acc7d48 DV	53	pass arguments to the kernel. For these platforms, and for the cases
	54	when you want to add some extra options to the command line or ignore
	55	the default command line, you can supply some command-line options at
	56	build time by entering them here. In other cases you can specify
	57	kernel args so that you don't have to set them up in board prom
	58	initialization routines.
	59
	60	For more information, see the CMDLINE_BOOL and CMDLINE_OVERRIDE
	61	options.
	62
	63	config CMDLINE_OVERRIDE
6b2aac42	64	bool "Built-in command line overrides firmware arguments"
6acc7d48 DV	65	depends on CMDLINE_BOOL
	66	help
	67	By setting this option to 'Y' you will have your kernel ignore
	68	command line arguments from firmware or second stage bootloader.
	69	Instead, the built-in command line will be used exclusively.
	70
	71	Normally, you will choose 'N' here.
1da177e4	72
1da177e4 LT	73	config SB1XXX_CORELIS
	74	bool "Corelis Debugger"
	75	depends on SIBYTE_SB1xxx_SOC
e87f69a5	76	select DEBUG_KERNEL if !COMPILE_TEST
3e441845	77	select DEBUG_INFO if !COMPILE_TEST
1da177e4 LT	78	help
	79	Select compile flags that produce code that can be processed by the
	80	Corelis mksym utility and UDB Emulator.
	81
f86a69b1 WZ	82	config DEBUG_ZBOOT
	83	bool "Enable compressed kernel support debugging"
	84	depends on DEBUG_KERNEL && SYS_SUPPORTS_ZBOOT
	85	default n
	86	help
	87	If you want to add compressed kernel support to a new board, and the
	88	board supports uart16550 compatible serial port, please select
	89	SYS_SUPPORTS_ZBOOT_UART16550 for your board and enable this option to
	90	debug it.
	91
	92	If your board doesn't support uart16550 compatible serial port, you
	93	can try to select SYS_SUPPORTS_ZBOOT and use the other methods to
	94	debug it. for example, add a new serial port support just as
	95	arch/mips/boot/compressed/uart-16550.c does.
	96
	97	After the compressed kernel support works, please disable this option
	98	to reduce the kernel image size and speed up the booting procedure a
	99	little.
	100
f92a05b9 PC	101	config ZBOOT_INGENIC_UART
	102	int "UART to use for compressed kernel debugging"
	103	depends on DEBUG_ZBOOT && MACH_INGENIC_SOC
	104	default 0
	105	range 0 4
	106	help
	107	Specify the UART that should be used for compressed kernel debugging.
	108
bba90760 DD	109	config SPINLOCK_TEST
	110	bool "Enable spinlock timing tests in debugfs"
	111	depends on DEBUG_FS
	112	default n
	113	help
	114	Add several files to the debugfs to test spinlock speed.
	115
d478b088 PB	116	config SCACHE_DEBUGFS
	117	bool "L2 cache debugfs entries"
	118	depends on DEBUG_FS
	119	help
	120	Enable this to allow parts of the L2 cache configuration, such as
	121	whether or not prefetching is enabled, to be exposed to userland
	122	via debugfs.
	123
	124	If unsure, say N.
	125
7e5e371e	126	menuconfig MIPS_CPS_NS16550_BOOL
609cf6f2 PB	127	bool "CPS SMP NS16550 UART output"
	128	depends on MIPS_CPS
	129	help
	130	Output debug information via an ns16550 compatible UART if exceptions
	131	occur early in the boot process of a secondary core.
	132
7e5e371e JH	133	if MIPS_CPS_NS16550_BOOL
	134
	135	config MIPS_CPS_NS16550
	136	def_bool MIPS_CPS_NS16550_BASE != 0
609cf6f2 PB	137
	138	config MIPS_CPS_NS16550_BASE
	139	hex "UART Base Address"
	140	default 0x1b0003f8 if MIPS_MALTA
7e5e371e	141	default 0
609cf6f2 PB	142	help
	143	The base address of the ns16550 compatible UART on which to output
	144	debug information from the early stages of core startup.
	145
7e5e371e JH	146	This is only used if non-zero.
7e5e371e JH	147
609cf6f2 PB	148	config MIPS_CPS_NS16550_SHIFT
609cf6f2 PB	149	int "UART Register Shift"
7e5e371e	150	default 0
609cf6f2 PB	151	help
	152	The number of bits to shift ns16550 register indices by in order to
	153	form their addresses. That is, log base 2 of the span between
	154	adjacent ns16550 registers in the system.
	155
ad42e0a8 SS	156	config MIPS_CPS_NS16550_WIDTH
	157	int "UART Register Width"
	158	default 1
	159	help
	160	ns16550 registers width. UART registers IO access methods will be
	161	selected in accordance with this parameter. By setting it to 1, 2 or
	162	4 UART registers will be accessed by means of lb/sb, lh/sh or lw/sw
	163	instructions respectively. Any value not from that set activates
	164	lb/sb instructions.
	165
7e5e371e	166	endif # MIPS_CPS_NS16550_BOOL