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Commit | Line | Data |
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1da177e4 LT |
1 | menu "Kernel hacking" |
2 | ||
afbfb52e | 3 | config TRACE_IRQFLAGS_SUPPORT |
d7ef4fb3 | 4 | def_bool y |
afbfb52e | 5 | |
1da177e4 LT |
6 | source "lib/Kconfig.debug" |
7 | ||
8 | config SH_STANDARD_BIOS | |
9 | bool "Use LinuxSH standard BIOS" | |
1a013e2f | 10 | depends on SUPERH32 |
1da177e4 LT |
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" | |
6fc21b82 PM |
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 | |
8d797cd1 | 31 | hex |
6fc21b82 | 32 | depends on EARLY_SCIF_CONSOLE |
2a8ff459 | 33 | default "0xa4400000" if CPU_SUBTYPE_SH7712 || CPU_SUBTYPE_SH7705 |
31a49c4b | 34 | default "0xa4430000" if CPU_SUBTYPE_SH7720 || CPU_SUBTYPE_SH7721 |
2ad69908 PM |
35 | default "0xf8420000" if CPU_SUBTYPE_SH7619 |
36 | default "0xff804000" if CPU_SUBTYPE_MXG | |
8d797cd1 | 37 | default "0xffc30000" if CPU_SUBTYPE_SHX3 |
2ad69908 | 38 | default "0xffe00000" if CPU_SUBTYPE_SH7780 || CPU_SUBTYPE_SH7763 || \ |
a4e1d084 YS |
39 | CPU_SUBTYPE_SH7722 || CPU_SUBTYPE_SH7366 || \ |
40 | CPU_SUBTYPE_SH7343 | |
c01f0f1a | 41 | default "0xfe4c0000" if CPU_SUBTYPE_SH7757 |
fd78a76a | 42 | default "0xffeb0000" if CPU_SUBTYPE_SH7785 |
8b27fc6d | 43 | default "0xffeb0000" if CPU_SUBTYPE_SH7786 |
2ad69908 PM |
44 | default "0xfffe8000" if CPU_SUBTYPE_SH7203 |
45 | default "0xfffe9800" if CPU_SUBTYPE_SH7206 || CPU_SUBTYPE_SH7263 | |
5dafc91f | 46 | default "0xffe80000" if CPU_SH4 |
05aa7882 | 47 | default "0xa4000150" if CPU_SH3 |
8d797cd1 | 48 | default "0x00000000" |
1da177e4 LT |
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 | ||
6fc21b82 PM |
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 | ||
9f14b84a | 66 | config STACK_DEBUG |
d153ea88 | 67 | bool "Check for stack overflows" |
5db141a9 | 68 | depends on DEBUG_KERNEL && SUPERH32 |
d153ea88 PM |
69 | help |
70 | This option will cause messages to be printed if free stack space | |
9f14b84a PM |
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. | |
d153ea88 PM |
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 | ||
a6a31139 PM |
84 | config 4KSTACKS |
85 | bool "Use 4Kb for kernel stacks instead of 8Kb" | |
b817f7e0 | 86 | depends on DEBUG_KERNEL && (MMU || BROKEN) && !PAGE_SIZE_64KB |
a6a31139 PM |
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 | ||
110ed282 PM |
94 | config IRQSTACKS |
95 | bool "Use separate kernel stacks when processing interrupts" | |
40c8bca7 | 96 | depends on DEBUG_KERNEL && SUPERH32 && BROKEN |
110ed282 PM |
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 | ||
5d2685d0 PM |
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 | ||
bd353861 MF |
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 | ||
740a3e67 PM |
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 | ||
8214d52a PM |
134 | config SH64_SR_WATCH |
135 | bool "Debug: set SR.WATCH to enable hardware watchpoints and trace" | |
fe58cac3 | 136 | depends on SUPERH64 |
8214d52a | 137 | |
473d1cf4 PM |
138 | config MCOUNT |
139 | def_bool y | |
140 | depends on SUPERH32 | |
141 | depends on STACK_DEBUG || FUNCTION_TRACER | |
142 | ||
1da177e4 | 143 | endmenu |