arch/sh/Kconfig.debug

   1 menu "Kernel hacking"
   2
   3 config TRACE_IRQFLAGS_SUPPORT
   4         def_bool y
   5
   6 source "lib/Kconfig.debug"
   7
   8 config SH_STANDARD_BIOS
   9         bool "Use LinuxSH standard BIOS"
  10         depends on SUPERH32
  11         help
  12           Say Y here if your target has the gdb-sh-stub
  13           package from www.m17n.org (or any conforming standard LinuxSH BIOS)
  14           in FLASH or EPROM.  The kernel will use standard BIOS calls during
  15           boot for various housekeeping tasks (including calls to read and
  16           write characters to a system console, get a MAC address from an
  17           on-board Ethernet interface, and shut down the hardware).  Note this
  18           does not work with machines with an existing operating system in
  19           mask ROM and no flash (WindowsCE machines fall in this category).
  20           If unsure, say N.
  21
  22 config EARLY_SCIF_CONSOLE
  23         bool "Use early SCIF console"
  24         help
  25           This enables an early console using a fixed SCIF port. This can
  26           be used by platforms that are either not running the SH
  27           standard BIOS, or do not wish to use the BIOS callbacks for the
  28           serial I/O.
  29
  30 config EARLY_SCIF_CONSOLE_PORT
  31         hex
  32         depends on EARLY_SCIF_CONSOLE
  33         default "0xa4400000" if CPU_SUBTYPE_SH7712 || CPU_SUBTYPE_SH7705
  34         default "0xa4430000" if CPU_SUBTYPE_SH7720 || CPU_SUBTYPE_SH7721
  35         default "0xf8420000" if CPU_SUBTYPE_SH7619
  36         default "0xff804000" if CPU_SUBTYPE_MXG
  37         default "0xffc30000" if CPU_SUBTYPE_SHX3
  38         default "0xffe00000" if CPU_SUBTYPE_SH7780 || CPU_SUBTYPE_SH7763 || \
  39                                 CPU_SUBTYPE_SH7722 || CPU_SUBTYPE_SH7366 || \
  40                                 CPU_SUBTYPE_SH7343
  41         default "0xffe80000" if CPU_SH4
  42         default "0xffea0000" if CPU_SUBTYPE_SH7785
  43         default "0xfffe8000" if CPU_SUBTYPE_SH7203
  44         default "0xfffe9800" if CPU_SUBTYPE_SH7206 || CPU_SUBTYPE_SH7263
  45         default "0x00000000"
  46
  47 config EARLY_PRINTK
  48         bool "Early printk support"
  49         depends on SH_STANDARD_BIOS || EARLY_SCIF_CONSOLE
  50         help
  51           Say Y here to redirect kernel printk messages to the serial port
  52           used by the SH-IPL bootloader, starting very early in the boot
  53           process and ending when the kernel's serial console is initialised.
  54           This option is only useful porting the kernel to a new machine,
  55           when the kernel may crash or hang before the serial console is
  56           initialised. If unsure, say N.
  57
  58           On devices that are running SH-IPL and want to keep the port
  59           initialization consistent while not using the BIOS callbacks,
  60           select both the EARLY_SCIF_CONSOLE and SH_STANDARD_BIOS, using
  61           the kernel command line option to toggle back and forth.
  62
  63 config DEBUG_BOOTMEM
  64         depends on DEBUG_KERNEL
  65         bool "Debug BOOTMEM initialization"
  66
  67 config DEBUG_STACKOVERFLOW
  68         bool "Check for stack overflows"
  69         depends on DEBUG_KERNEL && SUPERH32
  70         help
  71           This option will cause messages to be printed if free stack space
  72           drops below a certain limit.
  73
  74 config DEBUG_STACK_USAGE
  75         bool "Stack utilization instrumentation"
  76         depends on DEBUG_KERNEL
  77         help
  78           Enables the display of the minimum amount of free stack which each
  79           task has ever had available in the sysrq-T and sysrq-P debug output.
  80
  81           This option will slow down process creation somewhat.
  82
  83 config 4KSTACKS
  84         bool "Use 4Kb for kernel stacks instead of 8Kb"
  85         depends on DEBUG_KERNEL && (MMU || BROKEN) && !PAGE_SIZE_64KB
  86         help
  87           If you say Y here the kernel will use a 4Kb stacksize for the
  88           kernel stack attached to each process/thread. This facilitates
  89           running more threads on a system and also reduces the pressure
  90           on the VM subsystem for higher order allocations. This option
  91           will also use IRQ stacks to compensate for the reduced stackspace.
  92
  93 config IRQSTACKS
  94         bool "Use separate kernel stacks when processing interrupts"
  95         depends on DEBUG_KERNEL && SUPERH32
  96         help
  97           If you say Y here the kernel will use separate kernel stacks
  98           for handling hard and soft interrupts.  This can help avoid
  99           overflowing the process kernel stacks.
 100
 101 config DUMP_CODE
 102         bool "Show disassembly of nearby code in register dumps"
 103         depends on DEBUG_KERNEL && SUPERH32
 104         default y if DEBUG_BUGVERBOSE
 105         default n
 106         help
 107           This prints out a code trace of the instructions leading up to
 108           the faulting instruction as a debugging aid. As this does grow
 109           the kernel in size a bit, most users will want to say N here.
 110
 111           Those looking for more verbose debugging output should say Y.
 112
 113 config SH_NO_BSS_INIT
 114         bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)"
 115         depends on DEBUG_KERNEL
 116         default n
 117         help
 118           If running in painfully slow environments, such as an RTL
 119           simulation or from remote memory via SHdebug, where the memory
 120           can already be gauranteed to ber zeroed on boot, say Y.
 121
 122           For all other cases, say N. If this option seems perplexing, or
 123           you aren't sure, say N.
 124
 125 config MORE_COMPILE_OPTIONS
 126         bool "Add any additional compile options"
 127         help
 128           If you want to add additional CFLAGS to the kernel build, enable this
 129           option and then enter what you would like to add in the next question.
 130           Note however that -g is already appended with the selection of KGDB.
 131
 132 config COMPILE_OPTIONS
 133         string "Additional compile arguments"
 134         depends on MORE_COMPILE_OPTIONS
 135
 136 config SH64_SR_WATCH
 137         bool "Debug: set SR.WATCH to enable hardware watchpoints and trace"
 138         depends on SUPERH64
 139
 140 config POOR_MANS_STRACE
 141         bool "Debug: enable rudimentary strace facility"
 142         depends on SUPERH64
 143         help
 144           This option allows system calls to be traced to the console.  It also
 145           aids in detecting kernel stack underflow.  It is useful for debugging
 146           early-userland problems (e.g. init incurring fatal exceptions.)
 147
 148 endmenu