| # 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" |
| default n |
| 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 |
| default "" |
| 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" |
| default n |
| 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. |
| |
| endif # MIPS_CPS_NS16550_BOOL |