# 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