1# SPDX-License-Identifier: GPL-2.0
 2
 
 
 
 3config SH_STANDARD_BIOS
 4	bool "Use LinuxSH standard BIOS"
 
 5	help
 6	  Say Y here if your target has the gdb-sh-stub
 7	  package from www.m17n.org (or any conforming standard LinuxSH BIOS)
 8	  in FLASH or EPROM.  The kernel will use standard BIOS calls during
 9	  boot for various housekeeping tasks (including calls to read and
10	  write characters to a system console, get a MAC address from an
11	  on-board Ethernet interface, and shut down the hardware).  Note this
12	  does not work with machines with an existing operating system in
13	  mask ROM and no flash (WindowsCE machines fall in this category).
14	  If unsure, say N.
15
16config STACK_DEBUG
17	bool "Check for stack overflows"
18	depends on DEBUG_KERNEL
19	help
20	  This option will cause messages to be printed if free stack space
21	  drops below a certain limit. Saying Y here will add overhead to
22	  every function call and will therefore incur a major
23	  performance hit. Most users should say N.
24
25config 4KSTACKS
26	bool "Use 4Kb for kernel stacks instead of 8Kb"
27	depends on DEBUG_KERNEL && (MMU || BROKEN) && !PAGE_SIZE_64KB
28	help
29	  If you say Y here the kernel will use a 4Kb stacksize for the
30	  kernel stack attached to each process/thread. This facilitates
31	  running more threads on a system and also reduces the pressure
32	  on the VM subsystem for higher order allocations. This option
33	  will also use IRQ stacks to compensate for the reduced stackspace.
34
35config IRQSTACKS
36	bool "Use separate kernel stacks when processing interrupts"
37	depends on DEBUG_KERNEL && BROKEN
38	help
39	  If you say Y here the kernel will use separate kernel stacks
40	  for handling hard and soft interrupts.  This can help avoid
41	  overflowing the process kernel stacks.
42
43config DUMP_CODE
44	bool "Show disassembly of nearby code in register dumps"
45	depends on DEBUG_KERNEL
46	default y if DEBUG_BUGVERBOSE
47	default n
48	help
49	  This prints out a code trace of the instructions leading up to
50	  the faulting instruction as a debugging aid. As this does grow
51	  the kernel in size a bit, most users will want to say N here.
52
53	  Those looking for more verbose debugging output should say Y.
54
55config DWARF_UNWINDER
56	bool "Enable the DWARF unwinder for stacktraces"
57	depends on DEBUG_KERNEL
58	select FRAME_POINTER
 
59	default n
60	help
61	  Enabling this option will make stacktraces more accurate, at
62	  the cost of an increase in overall kernel size.
63
64config SH_NO_BSS_INIT
65	bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)"
66	depends on DEBUG_KERNEL
67	default n
68	help
69	  If running in painfully slow environments, such as an RTL
70	  simulation or from remote memory via SHdebug, where the memory
71	  can already be guaranteed to ber zeroed on boot, say Y.
72
73	  For all other cases, say N. If this option seems perplexing, or
74	  you aren't sure, say N.
75
 
 
 
 
76config MCOUNT
77	def_bool y
 
78	depends on STACK_DEBUG || FUNCTION_TRACER

 1# SPDX-License-Identifier: GPL-2.0
 2
 3config TRACE_IRQFLAGS_SUPPORT
 4	def_bool y
 5
 6config SH_STANDARD_BIOS
 7	bool "Use LinuxSH standard BIOS"
 8	depends on SUPERH32
 9	help
10	  Say Y here if your target has the gdb-sh-stub
11	  package from www.m17n.org (or any conforming standard LinuxSH BIOS)
12	  in FLASH or EPROM.  The kernel will use standard BIOS calls during
13	  boot for various housekeeping tasks (including calls to read and
14	  write characters to a system console, get a MAC address from an
15	  on-board Ethernet interface, and shut down the hardware).  Note this
16	  does not work with machines with an existing operating system in
17	  mask ROM and no flash (WindowsCE machines fall in this category).
18	  If unsure, say N.
19
20config STACK_DEBUG
21	bool "Check for stack overflows"
22	depends on DEBUG_KERNEL && SUPERH32
23	help
24	  This option will cause messages to be printed if free stack space
25	  drops below a certain limit. Saying Y here will add overhead to
26	  every function call and will therefore incur a major
27	  performance hit. Most users should say N.
28
29config 4KSTACKS
30	bool "Use 4Kb for kernel stacks instead of 8Kb"
31	depends on DEBUG_KERNEL && (MMU || BROKEN) && !PAGE_SIZE_64KB
32	help
33	  If you say Y here the kernel will use a 4Kb stacksize for the
34	  kernel stack attached to each process/thread. This facilitates
35	  running more threads on a system and also reduces the pressure
36	  on the VM subsystem for higher order allocations. This option
37	  will also use IRQ stacks to compensate for the reduced stackspace.
38
39config IRQSTACKS
40	bool "Use separate kernel stacks when processing interrupts"
41	depends on DEBUG_KERNEL && SUPERH32 && BROKEN
42	help
43	  If you say Y here the kernel will use separate kernel stacks
44	  for handling hard and soft interrupts.  This can help avoid
45	  overflowing the process kernel stacks.
46
47config DUMP_CODE
48	bool "Show disassembly of nearby code in register dumps"
49	depends on DEBUG_KERNEL && SUPERH32
50	default y if DEBUG_BUGVERBOSE
51	default n
52	help
53	  This prints out a code trace of the instructions leading up to
54	  the faulting instruction as a debugging aid. As this does grow
55	  the kernel in size a bit, most users will want to say N here.
56
57	  Those looking for more verbose debugging output should say Y.
58
59config DWARF_UNWINDER
60	bool "Enable the DWARF unwinder for stacktraces"
 
61	select FRAME_POINTER
62	depends on SUPERH32
63	default n
64	help
65	  Enabling this option will make stacktraces more accurate, at
66	  the cost of an increase in overall kernel size.
67
68config SH_NO_BSS_INIT
69	bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)"
70	depends on DEBUG_KERNEL
71	default n
72	help
73	  If running in painfully slow environments, such as an RTL
74	  simulation or from remote memory via SHdebug, where the memory
75	  can already be guaranteed to ber zeroed on boot, say Y.
76
77	  For all other cases, say N. If this option seems perplexing, or
78	  you aren't sure, say N.
79
80config SH64_SR_WATCH
81	bool "Debug: set SR.WATCH to enable hardware watchpoints and trace"
82	depends on SUPERH64
83
84config MCOUNT
85	def_bool y
86	depends on SUPERH32
87	depends on STACK_DEBUG || FUNCTION_TRACER