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 "0xffea0000" if CPU_SUBTYPE_SH7785
  42         default "0xffeb0000" if CPU_SUBTYPE_SH7786
  43         default "0xfffe8000" if CPU_SUBTYPE_SH7203
  44         default "0xfffe9800" if CPU_SUBTYPE_SH7206 || CPU_SUBTYPE_SH7263
  45         default "0xffe80000" if CPU_SH4
  46         default "0x00000000"
  47
  48 config EARLY_PRINTK
  49         bool "Early printk support"
  50         depends on SH_STANDARD_BIOS || EARLY_SCIF_CONSOLE
  51         help
  52           Say Y here to redirect kernel printk messages to the serial port
  53           used by the SH-IPL bootloader, starting very early in the boot
  54           process and ending when the kernel's serial console is initialised.
  55           This option is only useful porting the kernel to a new machine,
  56           when the kernel may crash or hang before the serial console is
  57           initialised. If unsure, say N.
  58
  59           On devices that are running SH-IPL and want to keep the port
  60           initialization consistent while not using the BIOS callbacks,
  61           select both the EARLY_SCIF_CONSOLE and SH_STANDARD_BIOS, using
  62           the kernel command line option to toggle back and forth.
  63
  64 config DEBUG_BOOTMEM
  65         depends on DEBUG_KERNEL
  66         bool "Debug BOOTMEM initialization"
  67
  68 config DEBUG_STACKOVERFLOW
  69         bool "Check for stack overflows"
  70         depends on DEBUG_KERNEL && SUPERH32
  71         help
  72           This option will cause messages to be printed if free stack space
  73           drops below a certain limit.
  74
  75 config DEBUG_STACK_USAGE
  76         bool "Stack utilization instrumentation"
  77         depends on DEBUG_KERNEL
  78         help
  79           Enables the display of the minimum amount of free stack which each
  80           task has ever had available in the sysrq-T and sysrq-P debug output.
  81
  82           This option will slow down process creation somewhat.
  83
  84 config 4KSTACKS
  85         bool "Use 4Kb for kernel stacks instead of 8Kb"
  86         depends on DEBUG_KERNEL && (MMU || BROKEN) && !PAGE_SIZE_64KB
  87         help
  88           If you say Y here the kernel will use a 4Kb stacksize for the
  89           kernel stack attached to each process/thread. This facilitates
  90           running more threads on a system and also reduces the pressure
  91           on the VM subsystem for higher order allocations. This option
  92           will also use IRQ stacks to compensate for the reduced stackspace.
  93
  94 config IRQSTACKS
  95         bool "Use separate kernel stacks when processing interrupts"
  96         depends on DEBUG_KERNEL && SUPERH32 && BROKEN
  97         help
  98           If you say Y here the kernel will use separate kernel stacks
  99           for handling hard and soft interrupts.  This can help avoid
 100           overflowing the process kernel stacks.
 101
 102 config DUMP_CODE
 103         bool "Show disassembly of nearby code in register dumps"
 104         depends on DEBUG_KERNEL && SUPERH32
 105         default y if DEBUG_BUGVERBOSE
 106         default n
 107         help
 108           This prints out a code trace of the instructions leading up to
 109           the faulting instruction as a debugging aid. As this does grow
 110           the kernel in size a bit, most users will want to say N here.
 111
 112           Those looking for more verbose debugging output should say Y.
 113
 114 config SH_NO_BSS_INIT
 115         bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)"
 116         depends on DEBUG_KERNEL
 117         default n
 118         help
 119           If running in painfully slow environments, such as an RTL
 120           simulation or from remote memory via SHdebug, where the memory
 121           can already be gauranteed to ber zeroed on boot, say Y.
 122
 123           For all other cases, say N. If this option seems perplexing, or
 124           you aren't sure, say N.
 125
 126 config SH64_SR_WATCH
 127         bool "Debug: set SR.WATCH to enable hardware watchpoints and trace"
 128         depends on SUPERH64
 129
 130 endmenu