Interrupt Service Routines (ISRs)

are software routines that hardware invokes in response to an interrupt. More...

Macros
#define	DIVIDE_ERROR   0
	DE Divide Error.
#define	DEBUG_EXC   1
	DB Debug.
#define	NMI_INTERRUPT   2
	Non Mascable Interrupt.
#define	BREAKPOINT   3
	BP Breakpoint.
#define	OVERFLOW   4
	OF Overflow.
#define	BOUND_RANGE_EXCEED   5
	BR Bound Range Exception.
#define	INVALID_OPCODE   6
	UD Invalid OpCode Exception.
#define	DEV_NOT_AVL   7
	NM Device Not Available.
#define	DOUBLE_FAULT   8
	DF Double Fault.
#define	COPROC_SEG_OVERRUN   9
	Coprocessor Segment Overrun.
#define	INVALID_TSS   10
	TS Invalid TSS.
#define	SEGMENT_NOT_PRESENT   11
	NP Segment Not Present.
#define	STACK_SEGMENT_FAULT   12
	SS Stack Segment Fault.
#define	GENERAL_PROTECTION   13
	GP General Protection.
#define	PAGE_FAULT   14
	PF Page Fault.
#define	INT_RSV   15
	XX Reserverd.
#define	FLOATING_POINT_ERR   16
	MF Floating Point.
#define	ALIGNMENT_CHECK   17
	AC Alignment Check.
#define	MACHINE_CHECK   18
	MC Machine Check.
#define	SIMD_FP_EXC   19
	XF Streaming SIMD Exception.
#define	VIRT_EXC   20
	Virtualization Exception.
#define	SECURITY_EXC   30
	Security Exception.
#define	TRIPLE_FAULT   31
	Triple Fault.
#define	SYSTEM_CALL   80
	System call interrupt.

Typedefs
typedef void(*	interrupt_handler_t) (pt_regs *f)
	Interrupt handler definition. More...

Functions
void	isrs_init (void)
	For each exceptions isrs_init sets a default handler which prints the rose exceptions and stops kernel execution.
void	irq_init (void)
	For each interrupt irq_init sets a default handler which prints the rose IRQ line and stops kernel execution.
int	isr_install_handler (unsigned i, interrupt_handler_t handler, char *description)
	Installs an ISR to handle an interrupt. More...
int	isr_uninstall_handler (unsigned i)
	Uninstall an ISR handler. More...
int	irq_install_handler (unsigned i, interrupt_handler_t handler, char *description)
	Installs an ISR to handle an interrupt. More...
int	irq_uninstall_handler (unsigned i, interrupt_handler_t handler)
	Uninstall an IRQ handler. More...
void	irq_handler (pt_regs *f)
	Method called by CPU to handle interrupts. More...
void	isq_handler (pt_regs *f)
	Method called by CPU to handle exceptions. More...

Detailed Description

are software routines that hardware invokes in response to an interrupt.

Typedef Documentation

interrupt_handler_t

typedef void(* interrupt_handler_t) (pt_regs *f)

Interrupt handler definition.

An interrupt handler is an interrupt service routine called to manage interrupt requests, or CPU execptions.

Parameters

f	An interrupt stack frame.

Function Documentation

irq_handler()

void irq_handler

(

pt_regs *

f

)

Method called by CPU to handle interrupts.

Parameters

f	The interrupt stack frame.

irq_install_handler()

int irq_install_handler	(	unsigned	i,
		interrupt_handler_t	handler,
		char *	description
	)

Installs an ISR to handle an interrupt.

Parameters

i	interrupt identifier.
handler	interrupt handler.
description	interrupt description.

Returns

0 on success, -1 otherwise.

irq_uninstall_handler()

int irq_uninstall_handler	(	unsigned	i,
		interrupt_handler_t	handler
	)

Uninstall an IRQ handler.

Parameters

i	interrupt identifier.
handler	interrupt handler.

Returns

0 on success, -1 otherwise.

isq_handler()

void isq_handler

(

pt_regs *

f

)

Method called by CPU to handle exceptions.

Parameters

f	The interrupt stack frame.

isr_install_handler()

int isr_install_handler	(	unsigned	i,
		interrupt_handler_t	handler,
		char *	description
	)

Installs an ISR to handle an interrupt.

Parameters

i	interrupt identifier.
handler	interrupt handler.
description	interrupt description.

Returns

0 on success, -1 otherwise.

isr_uninstall_handler()

int isr_uninstall_handler

(

unsigned

i

)

Uninstall an ISR handler.

Parameters

i	interrupt identifier.

Returns

0 on success, -1 otherwise.