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38#ifndef _UAPI_LINUX_REBOOT_H
#define _UAPI_LINUX_REBOOT_H
/*
* Magic values required to use _reboot() system call.
*/
#define LINUX_REBOOT_MAGIC1 0xfee1dead
#define LINUX_REBOOT_MAGIC2 672274793
#define LINUX_REBOOT_MAGIC2A 85072278
#define LINUX_REBOOT_MAGIC2B 369367448
#define LINUX_REBOOT_MAGIC2C 537993216
/*
* Commands accepted by the _reboot() system call.
*
* RESTART Restart system using default command and mode.
* HALT Stop OS and give system control to ROM monitor, if any.
* CAD_ON Ctrl-Alt-Del sequence causes RESTART command.
* CAD_OFF Ctrl-Alt-Del sequence sends SIGINT to init task.
* POWER_OFF Stop OS and remove all power from system, if possible.
* RESTART2 Restart system using given command string.
* SW_SUSPEND Suspend system using software suspend if compiled in.
* KEXEC Restart system using a previously loaded Linux kernel
*/
#define LINUX_REBOOT_CMD_RESTART 0x01234567
#define LINUX_REBOOT_CMD_HALT 0xCDEF0123
#define LINUX_REBOOT_CMD_CAD_ON 0x89ABCDEF
#define LINUX_REBOOT_CMD_CAD_OFF 0x00000000
#define LINUX_REBOOT_CMD_POWER_OFF 0x4321FEDC
#define LINUX_REBOOT_CMD_RESTART2 0xA1B2C3D4
#define LINUX_REBOOT_CMD_SW_SUSPEND 0xD000FCE2
#define LINUX_REBOOT_CMD_KEXEC 0x45584543
#endif /* _UAPI_LINUX_REBOOT_H */
ous housekeeping tasks (including calls to read and
write characters to a system console, get a MAC address from an
on-board Ethernet interface, and shut down the hardware). Note this
does not work with machines with an existing operating system in
mask ROM and no flash (WindowsCE machines fall in this category).
If unsure, say N.
config STACK_DEBUG
bool "Check for stack overflows"
depends on DEBUG_KERNEL && SUPERH32
help
This option will cause messages to be printed if free stack space
drops below a certain limit. Saying Y here will add overhead to
every function call and will therefore incur a major
performance hit. Most users should say N.
config 4KSTACKS
bool "Use 4Kb for kernel stacks instead of 8Kb"
depends on DEBUG_KERNEL && (MMU || BROKEN) && !PAGE_SIZE_64KB
help
If you say Y here the kernel will use a 4Kb stacksize for the
kernel stack attached to each process/thread. This facilitates
running more threads on a system and also reduces the pressure
on the VM subsystem for higher order allocations. This option
will also use IRQ stacks to compensate for the reduced stackspace.
config IRQSTACKS
bool "Use separate kernel stacks when processing interrupts"
depends on DEBUG_KERNEL && SUPERH32 && BROKEN
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 DUMP_CODE
bool "Show disassembly of nearby code in register dumps"
depends on DEBUG_KERNEL && SUPERH32
default y if DEBUG_BUGVERBOSE
default n
help
This prints out a code trace of the instructions leading up to
the faulting instruction as a debugging aid. As this does grow
the kernel in size a bit, most users will want to say N here.
Those looking for more verbose debugging output should say Y.
config DWARF_UNWINDER
bool "Enable the DWARF unwinder for stacktraces"
select FRAME_POINTER
depends on SUPERH32
default n
help
Enabling this option will make stacktraces more accurate, at
the cost of an increase in overall kernel size.
config SH_NO_BSS_INIT
bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)"
depends on DEBUG_KERNEL
default n
help
If running in painfully slow environments, such as an RTL
simulation or from remote memory via SHdebug, where the memory
can already be guaranteed to ber zeroed on boot, say Y.
For all other cases, say N. If this option seems perplexing, or
you aren't sure, say N.
config SH64_SR_WATCH
bool "Debug: set SR.WATCH to enable hardware watchpoints and trace"
depends on SUPERH64
config MCOUNT
def_bool y
depends on SUPERH32
depends on STACK_DEBUG || FUNCTION_TRACER
endmenu
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