Version:  2.0.40 2.2.26 2.4.37 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4

Linux/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
 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 if CPU_MIPSR6
117 
118 choice
119         prompt "Compact branch policy"
120         default MIPS_COMPACT_BRANCHES_OPTIMAL
121 
122 config MIPS_COMPACT_BRANCHES_NEVER
123         bool "Never (force delay slot branches)"
124         help
125           Pass the -mcompact-branches=never flag to the compiler in order to
126           force it to always emit branches with delay slots, and make no use
127           of the compact branch instructions introduced by MIPSr6. This is
128           useful if you suspect there may be an issue with compact branches in
129           either the compiler or the CPU.
130 
131 config MIPS_COMPACT_BRANCHES_OPTIMAL
132         bool "Optimal (use where beneficial)"
133         help
134           Pass the -mcompact-branches=optimal flag to the compiler in order for
135           it to make use of compact branch instructions where it deems them
136           beneficial, and use branches with delay slots elsewhere. This is the
137           default compiler behaviour, and should be used unless you have a
138           reason to choose otherwise.
139 
140 config MIPS_COMPACT_BRANCHES_ALWAYS
141         bool "Always (force compact branches)"
142         help
143           Pass the -mcompact-branches=always flag to the compiler in order to
144           force it to always emit compact branches, making no use of branch
145           instructions with delay slots. This can result in more compact code
146           which may be beneficial in some scenarios.
147 
148 endchoice
149 
150 endif # CPU_MIPSR6
151 
152 config SCACHE_DEBUGFS
153         bool "L2 cache debugfs entries"
154         depends on DEBUG_FS
155         help
156           Enable this to allow parts of the L2 cache configuration, such as
157           whether or not prefetching is enabled, to be exposed to userland
158           via debugfs.
159 
160           If unsure, say N.
161 
162 menuconfig MIPS_CPS_NS16550
163         bool "CPS SMP NS16550 UART output"
164         depends on MIPS_CPS
165         help
166           Output debug information via an ns16550 compatible UART if exceptions
167           occur early in the boot process of a secondary core.
168 
169 if MIPS_CPS_NS16550
170 
171 config MIPS_CPS_NS16550_BASE
172         hex "UART Base Address"
173         default 0x1b0003f8 if MIPS_MALTA
174         help
175           The base address of the ns16550 compatible UART on which to output
176           debug information from the early stages of core startup.
177 
178 config MIPS_CPS_NS16550_SHIFT
179         int "UART Register Shift"
180         default 0 if MIPS_MALTA
181         help
182           The number of bits to shift ns16550 register indices by in order to
183           form their addresses. That is, log base 2 of the span between
184           adjacent ns16550 registers in the system.
185 
186 endif # MIPS_CPS_NS16550
187 
188 endmenu

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us