Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

menu "Kernel hacking"

source "lib/Kconfig.debug"

config DEBUG_STACKOVERFLOW
        bool "Check for stack overflows"
        depends on DEBUG_KERNEL
        help
          This option will cause messages to be printed if free stack space
          drops below a certain limit.

config DEBUG_STACK_USAGE
        bool "Stack utilization instrumentation"
        depends on DEBUG_KERNEL
        help
          Enables the display of the minimum amount of free stack which each
          task has ever had available in the sysrq-T and sysrq-P debug output.

          This option will slow down process creation somewhat.

config DEBUG_PAGEALLOC
        bool "Debug page memory allocations"
        depends on DEBUG_KERNEL && !HIBERNATION
        help
          Unmap pages from the kernel linear mapping after free_pages().
          This results in a large slowdown, but helps to find certain types
          of memory corruptions.


config HCALL_STATS
        bool "Hypervisor call instrumentation"
        depends on PPC_PSERIES && DEBUG_FS
        help
          Adds code to keep track of the number of hypervisor calls made and
          the amount of time spent in hypervisor calls.  Wall time spent in
          each call is always calculated, and if available CPU cycles spent
          are also calculated.  A directory named hcall_inst is added at the
          root of the debugfs filesystem.  Within the hcall_inst directory
          are files that contain CPU specific call statistics.

          This option will add a small amount of overhead to all hypervisor
          calls.

config DEBUGGER
        bool "Enable debugger hooks"
        depends on DEBUG_KERNEL
        help
          Include in-kernel hooks for kernel debuggers. Unless you are
          intending to debug the kernel, say N here.

config KGDB
        bool "Include kgdb kernel debugger"
        depends on DEBUGGER && (BROKEN || PPC_GEN550 || 4xx)
        select DEBUG_INFO
        help
          Include in-kernel hooks for kgdb, the Linux kernel source level
          debugger.  See <http://kgdb.sourceforge.net/> for more information.
          Unless you are intending to debug the kernel, say N here.

choice
        prompt "Serial Port"
        depends on KGDB
        default KGDB_TTYS1

config KGDB_TTYS0
        bool "ttyS0"

config KGDB_TTYS1
        bool "ttyS1"

config KGDB_TTYS2
        bool "ttyS2"

config KGDB_TTYS3
        bool "ttyS3"

endchoice

config KGDB_CONSOLE
        bool "Enable serial console thru kgdb port"
        depends on KGDB && 8xx || CPM2
        help
          If you enable this, all serial console messages will be sent
          over the gdb stub.
          If unsure, say N.

config XMON
        bool "Include xmon kernel debugger"
        depends on DEBUGGER
        help
          Include in-kernel hooks for the xmon kernel monitor/debugger.
          Unless you are intending to debug the kernel, say N here.
          Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise
          nothing will appear on the screen (xmon writes directly to the
          framebuffer memory).
          The cmdline option 'xmon' or 'xmon=early' will drop into xmon
          very early during boot. 'xmon=on' will just enable the xmon
          debugger hooks.  'xmon=off' will disable the debugger hooks
          if CONFIG_XMON_DEFAULT is set.
          xmon will print a backtrace on the very first invocation.
          'xmon=nobt' will disable this autobacktrace.

config XMON_DEFAULT
        bool "Enable xmon by default"
        depends on XMON
        help
          xmon is normally disabled unless booted with 'xmon=on'.
          Use 'xmon=off' to disable xmon init during runtime.

config XMON_DISASSEMBLY
        bool "Include disassembly support in xmon"
        depends on XMON
        default y
        help
          Include support for disassembling in xmon. You probably want
          to say Y here, unless you're building for a memory-constrained
          system.

config IRQSTACKS
        bool "Use separate kernel stacks when processing interrupts"
        depends on PPC64
        help
          If you say Y here the kernel will use separate kernel stacks
          for handling hard and soft interrupts.  This can help avoid
          overflowing the process kernel stacks.

config VIRQ_DEBUG
        bool "Expose hardware/virtual IRQ mapping via debugfs"
        depends on DEBUG_FS && PPC_MERGE
        help
          This option will show the mapping relationship between hardware irq
          numbers and virtual irq numbers. The mapping is exposed via debugfs
          in the file powerpc/virq_mapping.

          If you don't know what this means you don't need it.

config BDI_SWITCH
        bool "Include BDI-2000 user context switcher"
        depends on DEBUG_KERNEL && PPC32
        help
          Include in-kernel support for the Abatron BDI2000 debugger.
          Unless you are intending to debug the kernel with one of these
          machines, say N here.

config BOOTX_TEXT
        bool "Support for early boot text console (BootX or OpenFirmware only)"
        depends on PPC_OF && PPC_MULTIPLATFORM
        help
          Say Y here to see progress messages from the boot firmware in text
          mode. Requires either BootX or Open Firmware.

config PPC_EARLY_DEBUG
        bool "Early debugging (dangerous)"

choice
        prompt "Early debugging console"
        depends on PPC_EARLY_DEBUG
        help
          Use the selected console for early debugging. Careful, if you
          enable debugging for the wrong type of machine your kernel
          _will not boot_.

config PPC_EARLY_DEBUG_LPAR
        bool "LPAR HV Console"
        depends on PPC_PSERIES
        help
          Select this to enable early debugging for a machine with a HVC
          console on vterm 0.

config PPC_EARLY_DEBUG_G5
        bool "Apple G5"
        depends on PPC_PMAC64
        help
          Select this to enable early debugging for Apple G5 machines.

config PPC_EARLY_DEBUG_RTAS_PANEL
        bool "RTAS Panel"
        depends on PPC_RTAS
        help
          Select this to enable early debugging via the RTAS panel.

config PPC_EARLY_DEBUG_RTAS_CONSOLE
        bool "RTAS Console"
        depends on PPC_RTAS
        select UDBG_RTAS_CONSOLE
        help
          Select this to enable early debugging via the RTAS console.

config PPC_EARLY_DEBUG_MAPLE
        bool "Maple real mode"
        depends on PPC_MAPLE
        help
          Select this to enable early debugging for Maple.

config PPC_EARLY_DEBUG_ISERIES
        bool "iSeries HV Console"
        depends on PPC_ISERIES
        help
          Select this to enable early debugging for legacy iSeries. You need
          to hit "Ctrl-x Ctrl-x" to see the messages on the console.

config PPC_EARLY_DEBUG_PAS_REALMODE
        bool "PA Semi real mode"
        depends on PPC_PASEMI
        help
          Select this to enable early debugging for PA Semi.
          Output will be on UART0.

config PPC_EARLY_DEBUG_BEAT
        bool "Beat HV Console"
        depends on PPC_CELLEB
        select PPC_UDBG_BEAT
        help
          Select this to enable early debugging for Celleb with Beat.

config PPC_EARLY_DEBUG_44x
        bool "Early serial debugging for IBM/AMCC 44x CPUs"
        depends on 44x
        help
          Select this to enable early debugging for IBM 44x chips via the
          inbuilt serial port.

config PPC_EARLY_DEBUG_CPM
        bool "Early serial debugging for Freescale CPM-based serial ports"
        depends on SERIAL_CPM
        select PIN_TLB if PPC_8xx
        help
          Select this to enable early debugging for Freescale chips
          using a CPM-based serial port.  This assumes that the bootwrapper
          has run, and set up the CPM in a particular way.

endchoice

config PPC_EARLY_DEBUG_44x_PHYSLOW
        hex "Low 32 bits of early debug UART physical address"
        depends on PPC_EARLY_DEBUG_44x
        default "0x40000200"

config PPC_EARLY_DEBUG_44x_PHYSHIGH
        hex "EPRN of early debug UART physical address"
        depends on PPC_EARLY_DEBUG_44x
        default "0x1"

config PPC_EARLY_DEBUG_CPM_ADDR
        hex "CPM UART early debug transmit descriptor address"
        depends on PPC_EARLY_DEBUG_CPM
        default "0xfa202008" if PPC_EP88XC
        default "0xf0000008" if CPM2
        default "0xff002008" if CPM1
        help
          This specifies the address of the transmit descriptor
          used for early debug output.  Because it is needed before
          platform probing is done, all platforms selected must
          share the same address.

endmenu