2005-04-17 05:20:36 +07:00
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menu "Kernel hacking"
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source "lib/Kconfig.debug"
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2010-09-23 05:34:36 +07:00
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config STRICT_DEVMEM
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bool "Filter access to /dev/mem"
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depends on MMU
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---help---
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If this option is disabled, you allow userspace (root) access to all
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of memory, including kernel and userspace memory. Accidental
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access to this is obviously disastrous, but specific access can
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be used by people debugging the kernel.
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If this option is switched on, the /dev/mem file only allows
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userspace access to memory mapped peripherals.
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If in doubt, say Y.
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2009-02-12 19:56:34 +07:00
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# RMK wants arm kernels compiled with frame pointers or stack unwinding.
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2005-04-17 05:20:36 +07:00
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# If you know what you are doing and are willing to live without stack
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# traces, you can get a slightly smaller kernel by setting this option to
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# n, but then RMK will have to kill you ;).
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config FRAME_POINTER
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bool
|
2009-07-24 18:33:02 +07:00
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depends on !THUMB2_KERNEL
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2010-11-07 00:33:53 +07:00
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default y if !ARM_UNWIND || FUNCTION_GRAPH_TRACER
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2005-04-17 05:20:36 +07:00
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help
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If you say N here, the resulting kernel will be slightly smaller and
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2009-02-12 19:56:34 +07:00
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faster. However, if neither FRAME_POINTER nor ARM_UNWIND are enabled,
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when a problem occurs with the kernel, the information that is
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reported is severely limited.
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config ARM_UNWIND
|
2010-12-06 06:06:22 +07:00
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bool "Enable stack unwinding support (EXPERIMENTAL)"
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2009-02-12 19:56:34 +07:00
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depends on AEABI && EXPERIMENTAL
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default y
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help
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This option enables stack unwinding support in the kernel
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using the information automatically generated by the
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compiler. The resulting kernel image is slightly bigger but
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the performance is not affected. Currently, this feature
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only works with EABI compilers. If unsure say Y.
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2005-04-17 05:20:36 +07:00
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2010-08-11 01:32:37 +07:00
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config OLD_MCOUNT
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bool
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depends on FUNCTION_TRACER && FRAME_POINTER
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default y
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2005-04-17 05:20:36 +07:00
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config DEBUG_USER
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bool "Verbose user fault messages"
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help
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When a user program crashes due to an exception, the kernel can
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print a brief message explaining what the problem was. This is
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sometimes helpful for debugging but serves no purpose on a
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production system. Most people should say N here.
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In addition, you need to pass user_debug=N on the kernel command
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line to enable this feature. N consists of the sum of:
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1 - undefined instruction events
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2 - system calls
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4 - invalid data aborts
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8 - SIGSEGV faults
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16 - SIGBUS faults
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# These options are only for real kernel hackers who want to get their hands dirty.
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config DEBUG_LL
|
2011-09-02 01:04:44 +07:00
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bool "Kernel low-level debugging functions (read help!)"
|
2005-04-17 05:20:36 +07:00
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depends on DEBUG_KERNEL
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help
|
2005-09-09 21:57:17 +07:00
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Say Y here to include definitions of printascii, printch, printhex
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2005-04-17 05:20:36 +07:00
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in the kernel. This is helpful if you are debugging code that
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executes before the console is initialized.
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2011-09-02 01:04:44 +07:00
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Note that selecting this option will limit the kernel to a single
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UART definition, as specified below. Attempting to boot the kernel
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image on a different platform *will not work*, so this option should
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not be enabled for kernels that are intended to be portable.
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2011-09-02 00:58:51 +07:00
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choice
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prompt "Kernel low-level debugging port"
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depends on DEBUG_LL
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2011-11-02 00:43:31 +07:00
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config AT91_DEBUG_LL_DBGU0
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bool "Kernel low-level debugging on rm9200, 9260/9g20, 9261/9g10 and 9rl"
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depends on HAVE_AT91_DBGU0
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config AT91_DEBUG_LL_DBGU1
|
2012-01-26 20:07:09 +07:00
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bool "Kernel low-level debugging on 9263 and 9g45"
|
2011-11-02 00:43:31 +07:00
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depends on HAVE_AT91_DBGU1
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2011-09-23 02:28:35 +07:00
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config DEBUG_CLPS711X_UART1
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bool "Kernel low-level debugging messages via UART1"
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depends on ARCH_CLPS711X
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help
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Say Y here if you want the debug print routines to direct
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their output to the first serial port on these devices.
|
2011-09-02 00:58:51 +07:00
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config DEBUG_CLPS711X_UART2
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bool "Kernel low-level debugging messages via UART2"
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depends on ARCH_CLPS711X
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help
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Say Y here if you want the debug print routines to direct
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their output to the second serial port on these devices.
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|
2012-03-22 16:29:23 +07:00
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config DEBUG_DAVINCI_DA8XX_UART1
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bool "Kernel low-level debugging on DaVinci DA8XX using UART1"
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depends on ARCH_DAVINCI_DA8XX
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help
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Say Y here if you want the debug print routines to direct
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their output to UART1 serial port on DaVinci DA8XX devices.
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config DEBUG_DAVINCI_DA8XX_UART2
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bool "Kernel low-level debugging on DaVinci DA8XX using UART2"
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depends on ARCH_DAVINCI_DA8XX
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help
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Say Y here if you want the debug print routines to direct
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their output to UART2 serial port on DaVinci DA8XX devices.
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config DEBUG_DAVINCI_DMx_UART0
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bool "Kernel low-level debugging on DaVinci DMx using UART0"
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depends on ARCH_DAVINCI_DMx
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help
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Say Y here if you want the debug print routines to direct
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their output to UART0 serial port on DaVinci DMx devices.
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config DEBUG_DAVINCI_TNETV107X_UART1
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bool "Kernel low-level debugging on DaVinci TNETV107x using UART1"
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depends on ARCH_DAVINCI_TNETV107X
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help
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Say Y here if you want the debug print routines to direct
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their output to UART1 serial port on DaVinci TNETV107X
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devices.
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|
2011-11-24 00:44:05 +07:00
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config DEBUG_DC21285_PORT
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bool "Kernel low-level debugging messages via footbridge serial port"
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depends on FOOTBRIDGE
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help
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Say Y here if you want the debug print routines to direct
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their output to the serial port in the DC21285 (Footbridge).
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config DEBUG_FOOTBRIDGE_COM1
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bool "Kernel low-level debugging messages via footbridge 8250 at PCI COM1"
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depends on FOOTBRIDGE
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help
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Say Y here if you want the debug print routines to direct
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their output to the 8250 at PCI COM1.
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2011-06-07 22:02:55 +07:00
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config DEBUG_HIGHBANK_UART
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bool "Kernel low-level debugging messages via Highbank UART"
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depends on ARCH_HIGHBANK
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help
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Say Y here if you want the debug print routines to direct
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their output to the UART on Highbank based devices.
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|
2011-08-19 11:56:59 +07:00
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config DEBUG_IMX1_UART
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bool "i.MX1 Debug UART"
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depends on SOC_IMX1
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help
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Say Y here if you want kernel low-level debugging support
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on i.MX1.
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config DEBUG_IMX23_UART
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bool "i.MX23 Debug UART"
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depends on SOC_IMX23
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help
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Say Y here if you want kernel low-level debugging support
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on i.MX23.
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config DEBUG_IMX25_UART
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bool "i.MX25 Debug UART"
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depends on SOC_IMX25
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help
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Say Y here if you want kernel low-level debugging support
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on i.MX25.
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config DEBUG_IMX21_IMX27_UART
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bool "i.MX21 and i.MX27 Debug UART"
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depends on SOC_IMX21 || SOC_IMX27
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help
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|
Say Y here if you want kernel low-level debugging support
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on i.MX21 or i.MX27.
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config DEBUG_IMX28_UART
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bool "i.MX28 Debug UART"
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depends on SOC_IMX28
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help
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|
Say Y here if you want kernel low-level debugging support
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on i.MX28.
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config DEBUG_IMX31_IMX35_UART
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bool "i.MX31 and i.MX35 Debug UART"
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|
depends on SOC_IMX31 || SOC_IMX35
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|
help
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|
Say Y here if you want kernel low-level debugging support
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on i.MX31 or i.MX35.
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config DEBUG_IMX51_UART
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bool "i.MX51 Debug UART"
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|
depends on SOC_IMX51
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|
help
|
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|
|
Say Y here if you want kernel low-level debugging support
|
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|
on i.MX51.
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|
config DEBUG_IMX50_IMX53_UART
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bool "i.MX50 and i.MX53 Debug UART"
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|
depends on SOC_IMX50 || SOC_IMX53
|
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|
help
|
|
|
|
Say Y here if you want kernel low-level debugging support
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|
on i.MX50 or i.MX53.
|
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|
|
2012-04-27 15:15:45 +07:00
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|
|
config DEBUG_IMX6Q_UART2
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bool "i.MX6Q Debug UART2"
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depends on SOC_IMX6Q
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|
help
|
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|
|
Say Y here if you want kernel low-level debugging support
|
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|
on i.MX6Q UART2. This is correct for e.g. the SabreLite
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board.
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|
2012-02-06 19:19:19 +07:00
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config DEBUG_IMX6Q_UART4
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bool "i.MX6Q Debug UART4"
|
2011-10-02 14:09:11 +07:00
|
|
|
depends on SOC_IMX6Q
|
|
|
|
help
|
|
|
|
Say Y here if you want kernel low-level debugging support
|
2012-02-06 19:19:19 +07:00
|
|
|
on i.MX6Q UART4.
|
2011-10-02 14:09:11 +07:00
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|
2011-11-24 00:44:05 +07:00
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|
|
config DEBUG_MSM_UART1
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bool "Kernel low-level debugging messages via MSM UART1"
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|
|
depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
|
2011-08-17 04:28:54 +07:00
|
|
|
help
|
|
|
|
Say Y here if you want the debug print routines to direct
|
2011-11-24 00:44:05 +07:00
|
|
|
their output to the first serial port on MSM devices.
|
2011-08-17 04:28:54 +07:00
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|
2011-11-24 00:44:05 +07:00
|
|
|
config DEBUG_MSM_UART2
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bool "Kernel low-level debugging messages via MSM UART2"
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|
depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
|
2011-08-17 04:28:54 +07:00
|
|
|
help
|
|
|
|
Say Y here if you want the debug print routines to direct
|
2011-11-24 00:44:05 +07:00
|
|
|
their output to the second serial port on MSM devices.
|
2011-08-17 04:28:54 +07:00
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|
2011-11-24 00:44:05 +07:00
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|
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config DEBUG_MSM_UART3
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bool "Kernel low-level debugging messages via MSM UART3"
|
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|
|
depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
|
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|
|
help
|
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|
|
Say Y here if you want the debug print routines to direct
|
|
|
|
their output to the third serial port on MSM devices.
|
2011-08-17 04:28:54 +07:00
|
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|
2011-11-24 00:44:05 +07:00
|
|
|
config DEBUG_MSM8660_UART
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|
|
bool "Kernel low-level debugging messages via MSM 8660 UART"
|
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|
|
depends on ARCH_MSM8X60
|
|
|
|
select MSM_HAS_DEBUG_UART_HS
|
2011-08-17 04:28:54 +07:00
|
|
|
help
|
|
|
|
Say Y here if you want the debug print routines to direct
|
2011-11-24 00:44:05 +07:00
|
|
|
their output to the serial port on MSM 8660 devices.
|
2011-08-17 04:28:54 +07:00
|
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|
2011-11-24 00:44:05 +07:00
|
|
|
config DEBUG_MSM8960_UART
|
|
|
|
bool "Kernel low-level debugging messages via MSM 8960 UART"
|
|
|
|
depends on ARCH_MSM8960
|
|
|
|
select MSM_HAS_DEBUG_UART_HS
|
|
|
|
help
|
|
|
|
Say Y here if you want the debug print routines to direct
|
|
|
|
their output to the serial port on MSM 8960 devices.
|
2011-08-17 04:28:54 +07:00
|
|
|
|
2011-08-17 04:30:28 +07:00
|
|
|
config DEBUG_REALVIEW_STD_PORT
|
|
|
|
bool "RealView Default UART"
|
|
|
|
depends on ARCH_REALVIEW
|
|
|
|
help
|
|
|
|
Say Y here if you want the debug print routines to direct
|
|
|
|
their output to the serial port on RealView EB, PB11MP, PBA8
|
|
|
|
and PBX platforms.
|
|
|
|
|
|
|
|
config DEBUG_REALVIEW_PB1176_PORT
|
|
|
|
bool "RealView PB1176 UART"
|
|
|
|
depends on MACH_REALVIEW_PB1176
|
|
|
|
help
|
|
|
|
Say Y here if you want the debug print routines to direct
|
|
|
|
their output to the standard serial port on the RealView
|
|
|
|
PB1176 platform.
|
|
|
|
|
2011-11-24 00:44:05 +07:00
|
|
|
config DEBUG_S3C_UART0
|
|
|
|
depends on PLAT_SAMSUNG
|
|
|
|
bool "Use S3C UART 0 for low-level debug"
|
2011-11-09 01:33:03 +07:00
|
|
|
help
|
|
|
|
Say Y here if you want the debug print routines to direct
|
2011-11-24 00:44:05 +07:00
|
|
|
their output to UART 0. The port must have been initialised
|
|
|
|
by the boot-loader before use.
|
2011-11-09 01:33:03 +07:00
|
|
|
|
2011-11-24 00:44:05 +07:00
|
|
|
The uncompressor code port configuration is now handled
|
|
|
|
by CONFIG_S3C_LOWLEVEL_UART_PORT.
|
|
|
|
|
|
|
|
config DEBUG_S3C_UART1
|
|
|
|
depends on PLAT_SAMSUNG
|
|
|
|
bool "Use S3C UART 1 for low-level debug"
|
2011-11-09 01:33:03 +07:00
|
|
|
help
|
|
|
|
Say Y here if you want the debug print routines to direct
|
2011-11-24 00:44:05 +07:00
|
|
|
their output to UART 1. The port must have been initialised
|
|
|
|
by the boot-loader before use.
|
2011-11-09 01:33:03 +07:00
|
|
|
|
2011-11-24 00:44:05 +07:00
|
|
|
The uncompressor code port configuration is now handled
|
|
|
|
by CONFIG_S3C_LOWLEVEL_UART_PORT.
|
|
|
|
|
|
|
|
config DEBUG_S3C_UART2
|
|
|
|
depends on PLAT_SAMSUNG
|
|
|
|
bool "Use S3C UART 2 for low-level debug"
|
2011-11-09 01:33:03 +07:00
|
|
|
help
|
|
|
|
Say Y here if you want the debug print routines to direct
|
2011-11-24 00:44:05 +07:00
|
|
|
their output to UART 2. The port must have been initialised
|
|
|
|
by the boot-loader before use.
|
2011-11-09 01:33:03 +07:00
|
|
|
|
2011-11-24 00:44:05 +07:00
|
|
|
The uncompressor code port configuration is now handled
|
|
|
|
by CONFIG_S3C_LOWLEVEL_UART_PORT.
|
|
|
|
|
2012-07-11 23:07:25 +07:00
|
|
|
config DEBUG_VEXPRESS_UART0_DETECT
|
|
|
|
bool "Autodetect UART0 on Versatile Express Cortex-A core tiles"
|
|
|
|
depends on ARCH_VEXPRESS && CPU_CP15_MMU
|
|
|
|
help
|
|
|
|
This option enables a simple heuristic which tries to determine
|
|
|
|
the motherboard's memory map variant (original or RS1) and then
|
|
|
|
choose the relevant UART0 base address.
|
|
|
|
|
|
|
|
Note that this will only work with standard A-class core tiles,
|
|
|
|
and may fail with non-standard SMM or custom software models.
|
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config DEBUG_VEXPRESS_UART0_CA9
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bool "Use PL011 UART0 at 0x10009000 (V2P-CA9 core tile)"
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depends on ARCH_VEXPRESS
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help
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This option selects UART0 at 0x10009000. Except for custom models,
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this applies only to the V2P-CA9 tile.
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config DEBUG_VEXPRESS_UART0_RS1
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bool "Use PL011 UART0 at 0x1c090000 (RS1 complaint tiles)"
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depends on ARCH_VEXPRESS
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help
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This option selects UART0 at 0x1c090000. This applies to most
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of the tiles using the RS1 memory map, including all new A-class
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core tiles, FPGA-based SMMs and software models.
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2011-11-24 00:44:05 +07:00
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config DEBUG_LL_UART_NONE
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bool "No low-level debugging UART"
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2011-11-09 01:33:04 +07:00
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help
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2011-11-24 00:44:05 +07:00
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Say Y here if your platform doesn't provide a UART option
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below. This relies on your platform choosing the right UART
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definition internally in order for low-level debugging to
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work.
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2011-11-09 01:33:04 +07:00
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2011-11-24 00:44:05 +07:00
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config DEBUG_ICEDCC
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bool "Kernel low-level debugging via EmbeddedICE DCC channel"
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2011-11-09 01:33:04 +07:00
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help
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Say Y here if you want the debug print routines to direct
|
2011-11-24 00:44:05 +07:00
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their output to the EmbeddedICE macrocell's DCC channel using
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co-processor 14. This is known to work on the ARM9 style ICE
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channel and on the XScale with the PEEDI.
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Note that the system will appear to hang during boot if there
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is nothing connected to read from the DCC.
|
2011-11-09 01:33:04 +07:00
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|
2012-03-27 17:30:31 +07:00
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config DEBUG_SEMIHOSTING
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bool "Kernel low-level debug output via semihosting I"
|
2011-11-09 01:33:03 +07:00
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help
|
2012-03-27 17:30:31 +07:00
|
|
|
Semihosting enables code running on an ARM target to use
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|
|
the I/O facilities on a host debugger/emulator through a
|
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simple SVC calls. The host debugger or emulator must have
|
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|
|
semihosting enabled for the special svc call to be trapped
|
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|
|
otherwise the kernel will crash.
|
2011-11-09 01:33:03 +07:00
|
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|
2012-03-27 17:30:31 +07:00
|
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|
This is known to work with OpenOCD, as wellas
|
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ARM's Fast Models, or any other controlling environment
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|
that implements semihosting.
|
2011-11-09 01:33:04 +07:00
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|
2012-03-27 17:30:31 +07:00
|
|
|
For more details about semihosting, please see
|
|
|
|
chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.
|
2011-11-09 01:33:04 +07:00
|
|
|
|
2011-09-02 00:58:51 +07:00
|
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|
endchoice
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|
2009-12-09 17:02:18 +07:00
|
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|
config EARLY_PRINTK
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|
|
bool "Early printk"
|
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|
|
depends on DEBUG_LL
|
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|
|
help
|
|
|
|
Say Y here if you want to have an early console using the
|
|
|
|
kernel low-level debugging functions. Add earlyprintk to your
|
|
|
|
kernel parameters to enable this console.
|
|
|
|
|
2009-12-01 20:00:51 +07:00
|
|
|
config OC_ETM
|
|
|
|
bool "On-chip ETM and ETB"
|
2011-09-07 15:02:35 +07:00
|
|
|
depends on ARM_AMBA
|
2009-12-01 20:00:51 +07:00
|
|
|
help
|
|
|
|
Enables the on-chip embedded trace macrocell and embedded trace
|
|
|
|
buffer driver that will allow you to collect traces of the
|
|
|
|
kernel code.
|
|
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|
|
2011-08-27 18:36:58 +07:00
|
|
|
config ARM_KPROBES_TEST
|
|
|
|
tristate "Kprobes test module"
|
|
|
|
depends on KPROBES && MODULES
|
|
|
|
help
|
|
|
|
Perform tests of kprobes API and instruction set simulation.
|
|
|
|
|
2012-07-06 21:43:03 +07:00
|
|
|
config PID_IN_CONTEXTIDR
|
|
|
|
bool "Write the current PID to the CONTEXTIDR register"
|
|
|
|
depends on CPU_COPY_V6
|
|
|
|
help
|
|
|
|
Enabling this option causes the kernel to write the current PID to
|
|
|
|
the PROCID field of the CONTEXTIDR register, at the expense of some
|
|
|
|
additional instructions during context switch. Say Y here only if you
|
|
|
|
are planning to use hardware trace tools with this kernel.
|
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
endmenu
|