arch/mips/Kconfig.debug

   1 menu "Kernel hacking"
   2
   3 config TRACE_IRQFLAGS_SUPPORT
   4         bool
   5         default y
   6
   7 source "lib/Kconfig.debug"
   8
   9 config EARLY_PRINTK
  10         bool "Early printk" if EXPERT
  11         depends on SYS_HAS_EARLY_PRINTK
  12         default y
  13         help
  14           This option enables special console drivers which allow the kernel
  15           to print messages very early in the bootup process.
  16
  17           This is useful for kernel debugging when your machine crashes very
  18           early before the console code is initialized. For normal operation,
  19           it is not recommended because it looks ugly on some machines and
  20           doesn't cooperate with an X server. You should normally say N here,
  21           unless you want to debug such a crash.
  22
  23 config EARLY_PRINTK_8250
  24         bool
  25         depends on EARLY_PRINTK && USE_GENERIC_EARLY_PRINTK_8250
  26         default y
  27         help
  28           "8250/16550 and compatible serial early printk driver"
  29           If you say Y here, it will be possible to use a 8250/16550 serial
  30           port as the boot console.
  31
  32 config USE_GENERIC_EARLY_PRINTK_8250
  33         bool
  34
  35 config CMDLINE_BOOL
  36         bool "Built-in kernel command line"
  37         default n
  38         help
  39           For most systems, it is firmware or second stage bootloader that
  40           by default specifies the kernel command line options.  However,
  41           it might be necessary or advantageous to either override the
  42           default kernel command line or add a few extra options to it.
  43           For such cases, this option allows you to hardcode your own
  44           command line options directly into the kernel.  For that, you
  45           should choose 'Y' here, and fill in the extra boot arguments
  46           in CONFIG_CMDLINE.
  47
  48           The built-in options will be concatenated to the default command
  49           line if CMDLINE_OVERRIDE is set to 'N'. Otherwise, the default
  50           command line will be ignored and replaced by the built-in string.
  51
  52           Most MIPS systems will normally expect 'N' here and rely upon
  53           the command line from the firmware or the second-stage bootloader.
  54
  55 config CMDLINE
  56         string "Default kernel command string"
  57         depends on CMDLINE_BOOL
  58         default ""
  59         help
  60           On some platforms, there is currently no way for the boot loader to
  61           pass arguments to the kernel.  For these platforms, and for the cases
  62           when you want to add some extra options to the command line or ignore
  63           the default command line, you can supply some command-line options at
  64           build time by entering them here.  In other cases you can specify
  65           kernel args so that you don't have to set them up in board prom
  66           initialization routines.
  67
  68           For more information, see the CMDLINE_BOOL and CMDLINE_OVERRIDE
  69           options.
  70
  71 config CMDLINE_OVERRIDE
  72         bool "Built-in command line overrides firmware arguments"
  73         default n
  74         depends on CMDLINE_BOOL
  75         help
  76           By setting this option to 'Y' you will have your kernel ignore
  77           command line arguments from firmware or second stage bootloader.
  78           Instead, the built-in command line will be used exclusively.
  79
  80           Normally, you will choose 'N' here.
  81
  82 config SB1XXX_CORELIS
  83         bool "Corelis Debugger"
  84         depends on SIBYTE_SB1xxx_SOC
  85         select DEBUG_INFO if !COMPILE_TEST
  86         help
  87           Select compile flags that produce code that can be processed by the
  88           Corelis mksym utility and UDB Emulator.
  89
  90 config DEBUG_ZBOOT
  91         bool "Enable compressed kernel support debugging"
  92         depends on DEBUG_KERNEL && SYS_SUPPORTS_ZBOOT
  93         default n
  94         help
  95           If you want to add compressed kernel support to a new board, and the
  96           board supports uart16550 compatible serial port, please select
  97           SYS_SUPPORTS_ZBOOT_UART16550 for your board and enable this option to
  98           debug it.
  99
 100           If your board doesn't support uart16550 compatible serial port, you
 101           can try to select SYS_SUPPORTS_ZBOOT and use the other methods to
 102           debug it. for example, add a new serial port support just as
 103           arch/mips/boot/compressed/uart-16550.c does.
 104
 105           After the compressed kernel support works, please disable this option
 106           to reduce the kernel image size and speed up the booting procedure a
 107           little.
 108
 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
 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
 126 menuconfig MIPS_CPS_NS16550
 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
 133 if MIPS_CPS_NS16550
 134
 135 config MIPS_CPS_NS16550_BASE
 136         hex "UART Base Address"
 137         default 0x1b0003f8 if MIPS_MALTA
 138         help
 139           The base address of the ns16550 compatible UART on which to output
 140           debug information from the early stages of core startup.
 141
 142 config MIPS_CPS_NS16550_SHIFT
 143         int "UART Register Shift"
 144         default 0 if MIPS_MALTA
 145         help
 146           The number of bits to shift ns16550 register indices by in order to
 147           form their addresses. That is, log base 2 of the span between
 148           adjacent ns16550 registers in the system.
 149
 150 endif # MIPS_CPS_NS16550
 151
 152 endmenu