[linux-2.6-block.git] / arch / mips / Kconfig.debug

# SPDX-License-Identifier: GPL-2.0

config TRACE_IRQFLAGS_SUPPORT
	bool
	default y

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_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 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
192ef366 RB	3	config TRACE_IRQFLAGS_SUPPORT
	4	bool
	5	default y
	6
4dd92e15	7	config EARLY_PRINTK
6a108a14	8	bool "Early printk" if EXPERT
4dd92e15 RB	9	depends on SYS_HAS_EARLY_PRINTK
	10	default y
	11	help
	12	This option enables special console drivers which allow the kernel
	13	to print messages very early in the bootup process.
	14
	15	This is useful for kernel debugging when your machine crashes very
	16	early before the console code is initialized. For normal operation,
	17	it is not recommended because it looks ugly on some machines and
	18	doesn't cooperate with an X server. You should normally say N here,
	19	unless you want to debug such a crash.
	20
7cd93b89	21	config EARLY_PRINTK_8250
e6086557 RB	22	bool
	23	depends on EARLY_PRINTK && USE_GENERIC_EARLY_PRINTK_8250
	24	default y
7cd93b89	25	help
e6086557	26	"8250/16550 and compatible serial early printk driver"
7cd93b89 YY	27	If you say Y here, it will be possible to use a 8250/16550 serial
	28	port as the boot console.
	29
e6086557 RB	30	config USE_GENERIC_EARLY_PRINTK_8250
	31	bool
	32
6acc7d48 DV	33	config CMDLINE_BOOL
6acc7d48 DV	34	bool "Built-in kernel command line"
6acc7d48 DV	35	help
	36	For most systems, it is firmware or second stage bootloader that
	37	by default specifies the kernel command line options. However,
	38	it might be necessary or advantageous to either override the
	39	default kernel command line or add a few extra options to it.
	40	For such cases, this option allows you to hardcode your own
	41	command line options directly into the kernel. For that, you
	42	should choose 'Y' here, and fill in the extra boot arguments
	43	in CONFIG_CMDLINE.
	44
	45	The built-in options will be concatenated to the default command
	46	line if CMDLINE_OVERRIDE is set to 'N'. Otherwise, the default
	47	command line will be ignored and replaced by the built-in string.
	48
	49	Most MIPS systems will normally expect 'N' here and rely upon
	50	the command line from the firmware or the second-stage bootloader.
	51
1da177e4 LT	52	config CMDLINE
1da177e4 LT	53	string "Default kernel command string"
6acc7d48	54	depends on CMDLINE_BOOL
1da177e4	55	help
3e7f9b82	56	On some platforms, there is currently no way for the boot loader to
6acc7d48 DV	57	pass arguments to the kernel. For these platforms, and for the cases
	58	when you want to add some extra options to the command line or ignore
	59	the default command line, you can supply some command-line options at
	60	build time by entering them here. In other cases you can specify
	61	kernel args so that you don't have to set them up in board prom
	62	initialization routines.
	63
	64	For more information, see the CMDLINE_BOOL and CMDLINE_OVERRIDE
	65	options.
	66
	67	config CMDLINE_OVERRIDE
6b2aac42	68	bool "Built-in command line overrides firmware arguments"
6acc7d48 DV	69	depends on CMDLINE_BOOL
	70	help
	71	By setting this option to 'Y' you will have your kernel ignore
	72	command line arguments from firmware or second stage bootloader.
	73	Instead, the built-in command line will be used exclusively.
	74
	75	Normally, you will choose 'N' here.
1da177e4	76
1da177e4 LT	77	config SB1XXX_CORELIS
	78	bool "Corelis Debugger"
	79	depends on SIBYTE_SB1xxx_SOC
3e441845	80	select DEBUG_INFO if !COMPILE_TEST
1da177e4 LT	81	help
	82	Select compile flags that produce code that can be processed by the
	83	Corelis mksym utility and UDB Emulator.
	84
f86a69b1 WZ	85	config DEBUG_ZBOOT
	86	bool "Enable compressed kernel support debugging"
	87	depends on DEBUG_KERNEL && SYS_SUPPORTS_ZBOOT
	88	default n
	89	help
	90	If you want to add compressed kernel support to a new board, and the
	91	board supports uart16550 compatible serial port, please select
	92	SYS_SUPPORTS_ZBOOT_UART16550 for your board and enable this option to
	93	debug it.
	94
	95	If your board doesn't support uart16550 compatible serial port, you
	96	can try to select SYS_SUPPORTS_ZBOOT and use the other methods to
	97	debug it. for example, add a new serial port support just as
	98	arch/mips/boot/compressed/uart-16550.c does.
	99
	100	After the compressed kernel support works, please disable this option
	101	to reduce the kernel image size and speed up the booting procedure a
	102	little.
	103
bba90760 DD	104	config SPINLOCK_TEST
	105	bool "Enable spinlock timing tests in debugfs"
	106	depends on DEBUG_FS
	107	default n
	108	help
	109	Add several files to the debugfs to test spinlock speed.
	110
d478b088 PB	111	config SCACHE_DEBUGFS
	112	bool "L2 cache debugfs entries"
	113	depends on DEBUG_FS
	114	help
	115	Enable this to allow parts of the L2 cache configuration, such as
	116	whether or not prefetching is enabled, to be exposed to userland
	117	via debugfs.
	118
	119	If unsure, say N.
	120
7e5e371e	121	menuconfig MIPS_CPS_NS16550_BOOL
609cf6f2 PB	122	bool "CPS SMP NS16550 UART output"
	123	depends on MIPS_CPS
	124	help
	125	Output debug information via an ns16550 compatible UART if exceptions
	126	occur early in the boot process of a secondary core.
	127
7e5e371e JH	128	if MIPS_CPS_NS16550_BOOL
	129
	130	config MIPS_CPS_NS16550
	131	def_bool MIPS_CPS_NS16550_BASE != 0
609cf6f2 PB	132
	133	config MIPS_CPS_NS16550_BASE
	134	hex "UART Base Address"
	135	default 0x1b0003f8 if MIPS_MALTA
7e5e371e	136	default 0
609cf6f2 PB	137	help
	138	The base address of the ns16550 compatible UART on which to output
	139	debug information from the early stages of core startup.
	140
7e5e371e JH	141	This is only used if non-zero.
7e5e371e JH	142
609cf6f2 PB	143	config MIPS_CPS_NS16550_SHIFT
609cf6f2 PB	144	int "UART Register Shift"
7e5e371e	145	default 0
609cf6f2 PB	146	help
	147	The number of bits to shift ns16550 register indices by in order to
	148	form their addresses. That is, log base 2 of the span between
	149	adjacent ns16550 registers in the system.
	150
ad42e0a8 SS	151	config MIPS_CPS_NS16550_WIDTH
	152	int "UART Register Width"
	153	default 1
	154	help
	155	ns16550 registers width. UART registers IO access methods will be
	156	selected in accordance with this parameter. By setting it to 1, 2 or
	157	4 UART registers will be accessed by means of lb/sb, lh/sh or lw/sw
	158	instructions respectively. Any value not from that set activates
	159	lb/sb instructions.
	160
7e5e371e	161	endif # MIPS_CPS_NS16550_BOOL