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+# 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