Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | menu "Kernel hacking" |
| 2 | |
Paul Mundt | afbfb52 | 2006-12-04 18:17:28 +0900 | [diff] [blame] | 3 | config TRACE_IRQFLAGS_SUPPORT |
Harvey Harrison | d7ef4fb | 2007-12-11 13:49:35 +0900 | [diff] [blame] | 4 | def_bool y |
Paul Mundt | afbfb52 | 2006-12-04 18:17:28 +0900 | [diff] [blame] | 5 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | source "lib/Kconfig.debug" |
| 7 | |
| 8 | config SH_STANDARD_BIOS |
| 9 | bool "Use LinuxSH standard BIOS" |
Paul Mundt | 1a013e2 | 2008-04-25 11:54:06 +0900 | [diff] [blame] | 10 | depends on SUPERH32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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" |
Paul Mundt | 6fc21b8 | 2006-11-27 12:10:23 +0900 | [diff] [blame] | 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 |
Paul Mundt | 8d797cd | 2007-08-07 18:52:29 +0900 | [diff] [blame] | 31 | hex |
Paul Mundt | 6fc21b8 | 2006-11-27 12:10:23 +0900 | [diff] [blame] | 32 | depends on EARLY_SCIF_CONSOLE |
Paul Mundt | 2ad6990 | 2008-03-13 12:52:44 +0900 | [diff] [blame] | 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 || \ |
Yoshihiro Shimoda | a4e1d08 | 2008-07-07 21:11:51 +0900 | [diff] [blame] | 39 | CPU_SUBTYPE_SH7722 || CPU_SUBTYPE_SH7366 || \ |
| 40 | CPU_SUBTYPE_SH7343 |
Yoshihiro Shimoda | c01f0f1 | 2009-08-21 16:30:28 +0900 | [diff] [blame^] | 41 | default "0xfe4c0000" if CPU_SUBTYPE_SH7757 |
Stuart Menefy | fd78a76 | 2009-07-29 23:01:24 +0900 | [diff] [blame] | 42 | default "0xffeb0000" if CPU_SUBTYPE_SH7785 |
Paul Mundt | 8b27fc6 | 2009-06-16 03:58:25 +0900 | [diff] [blame] | 43 | default "0xffeb0000" if CPU_SUBTYPE_SH7786 |
Paul Mundt | 6d01f51 | 2007-11-26 18:17:21 +0900 | [diff] [blame] | 44 | default "0xfffe8000" if CPU_SUBTYPE_SH7203 |
Paul Mundt | a8f67f4 | 2007-11-26 19:54:02 +0900 | [diff] [blame] | 45 | default "0xfffe9800" if CPU_SUBTYPE_SH7206 || CPU_SUBTYPE_SH7263 |
Magnus Damm | 5dafc91 | 2009-05-07 10:17:44 +0000 | [diff] [blame] | 46 | default "0xffe80000" if CPU_SH4 |
Rafael Ignacio Zurita | 05aa788 | 2009-08-04 14:38:08 +0900 | [diff] [blame] | 47 | default "0xa4000150" if CPU_SH3 |
Paul Mundt | 8d797cd | 2007-08-07 18:52:29 +0900 | [diff] [blame] | 48 | default "0x00000000" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
| 50 | config EARLY_PRINTK |
| 51 | bool "Early printk support" |
| 52 | depends on SH_STANDARD_BIOS || EARLY_SCIF_CONSOLE |
| 53 | help |
| 54 | Say Y here to redirect kernel printk messages to the serial port |
| 55 | used by the SH-IPL bootloader, starting very early in the boot |
| 56 | process and ending when the kernel's serial console is initialised. |
| 57 | This option is only useful porting the kernel to a new machine, |
| 58 | when the kernel may crash or hang before the serial console is |
| 59 | initialised. If unsure, say N. |
| 60 | |
Paul Mundt | 6fc21b8 | 2006-11-27 12:10:23 +0900 | [diff] [blame] | 61 | On devices that are running SH-IPL and want to keep the port |
| 62 | initialization consistent while not using the BIOS callbacks, |
| 63 | select both the EARLY_SCIF_CONSOLE and SH_STANDARD_BIOS, using |
| 64 | the kernel command line option to toggle back and forth. |
| 65 | |
Paul Mundt | 9f14b84 | 2009-07-11 20:05:34 +0900 | [diff] [blame] | 66 | config STACK_DEBUG |
Paul Mundt | d153ea8 | 2006-09-27 18:20:16 +0900 | [diff] [blame] | 67 | bool "Check for stack overflows" |
Paul Mundt | 5db141a | 2007-11-21 17:47:15 +0900 | [diff] [blame] | 68 | depends on DEBUG_KERNEL && SUPERH32 |
Paul Mundt | d153ea8 | 2006-09-27 18:20:16 +0900 | [diff] [blame] | 69 | help |
| 70 | This option will cause messages to be printed if free stack space |
Paul Mundt | 9f14b84 | 2009-07-11 20:05:34 +0900 | [diff] [blame] | 71 | drops below a certain limit. Saying Y here will add overhead to |
| 72 | every function call and will therefore incur a major |
| 73 | performance hit. Most users should say N. |
Paul Mundt | d153ea8 | 2006-09-27 18:20:16 +0900 | [diff] [blame] | 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 | |
Paul Mundt | a6a31139 | 2006-09-27 18:22:14 +0900 | [diff] [blame] | 84 | config 4KSTACKS |
| 85 | bool "Use 4Kb for kernel stacks instead of 8Kb" |
Paul Mundt | b817f7e | 2008-09-20 20:16:35 +0900 | [diff] [blame] | 86 | depends on DEBUG_KERNEL && (MMU || BROKEN) && !PAGE_SIZE_64KB |
Paul Mundt | a6a31139 | 2006-09-27 18:22:14 +0900 | [diff] [blame] | 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 | |
Paul Mundt | 110ed28 | 2007-11-02 12:16:51 +0900 | [diff] [blame] | 94 | config IRQSTACKS |
| 95 | bool "Use separate kernel stacks when processing interrupts" |
Paul Mundt | 40c8bca | 2009-05-07 15:24:36 +0900 | [diff] [blame] | 96 | depends on DEBUG_KERNEL && SUPERH32 && BROKEN |
Paul Mundt | 110ed28 | 2007-11-02 12:16:51 +0900 | [diff] [blame] | 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 | |
Paul Mundt | 5d2685d | 2008-12-17 15:56:06 +0900 | [diff] [blame] | 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 | |
Matt Fleming | bd35386 | 2009-08-14 01:58:43 +0900 | [diff] [blame] | 114 | config DWARF_UNWINDER |
| 115 | bool "Enable the DWARF unwinder for stacktraces" |
| 116 | select FRAME_POINTER |
| 117 | default n |
| 118 | help |
| 119 | Enabling this option will make stacktraces more accurate, at |
| 120 | the cost of an increase in overall kernel size. |
| 121 | |
Paul Mundt | 740a3e6 | 2008-12-17 15:33:43 +0900 | [diff] [blame] | 122 | config SH_NO_BSS_INIT |
| 123 | bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)" |
| 124 | depends on DEBUG_KERNEL |
| 125 | default n |
| 126 | help |
| 127 | If running in painfully slow environments, such as an RTL |
| 128 | simulation or from remote memory via SHdebug, where the memory |
| 129 | can already be gauranteed to ber zeroed on boot, say Y. |
| 130 | |
| 131 | For all other cases, say N. If this option seems perplexing, or |
| 132 | you aren't sure, say N. |
| 133 | |
Paul Mundt | 8214d52 | 2007-11-21 16:58:56 +0900 | [diff] [blame] | 134 | config SH64_SR_WATCH |
| 135 | bool "Debug: set SR.WATCH to enable hardware watchpoints and trace" |
Paul Mundt | fe58cac | 2008-12-17 15:36:50 +0900 | [diff] [blame] | 136 | depends on SUPERH64 |
Paul Mundt | 8214d52 | 2007-11-21 16:58:56 +0900 | [diff] [blame] | 137 | |
Paul Mundt | 473d1cf | 2009-07-11 19:56:58 +0900 | [diff] [blame] | 138 | config MCOUNT |
| 139 | def_bool y |
| 140 | depends on SUPERH32 |
| 141 | depends on STACK_DEBUG || FUNCTION_TRACER |
| 142 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | endmenu |