port.c File Reference

IO-ports for x86. More...

#include "port.h"
#include "mal.h"
#include "x86int.h"
#include "debug.h"
#include "pic8259.h"

Functions
static uint32_t	ioAccessValid (uint16_t port)
void	outb (uint16_t port, uint8_t value)
	IO port write byte. More...
void	outw (uint16_t port, uint16_t value)
	IO port write word. More...
void	outl (uint16_t port, uint32_t value)
	Out operation on 4-byte value. More...
uint8_t	inb (uint16_t port)
	IO port read byte. More...
uint16_t	inw (uint16_t port)
	IO port read word. More...
uint32_t	inl (uint16_t port)
	In operation on a 4-bytes value. More...
void	faultToParent (uint32_t data1, uint32_t data2, gate_ctx_t *ctx)
	Dispatch an access fault to the parent partition. More...
void	outbGlue (gate_ctx_t *ctx, uint32_t port, uint32_t value)
	Glue function for outb callgate. More...
void	outwGlue (gate_ctx_t *ctx, uint32_t port, uint32_t value)
	Glue function for outw callgate. More...
void	outlGlue (gate_ctx_t *ctx, uint32_t port, uint32_t value)
	Glue function for outl callgate. More...
void	outaddrlGlue (gate_ctx_t *ctx, uint32_t port, uint32_t value)
	Glue function for outaddrl callgate. More...
uint32_t	inbGlue (gate_ctx_t *ctx, uint32_t port)
	Glue function for inb callgate. More...
uint32_t	inwGlue (gate_ctx_t *ctx, uint32_t port)
	Glue function for inw callgate. More...
uint32_t	inlGlue (gate_ctx_t *ctx, uint32_t port)
	Glue function for inl callgate. More...
uint32_t	timerGlue (void)
	Glue function for timer callgate. More...

Detailed Description

IO-ports for x86.

Function Documentation

faultToParent()

void faultToParent	(	uint32_t	data1,
		uint32_t	data2,
		gate_ctx_t *	ctx
	)

Dispatch an access fault to the parent partition.

Parameters

data1	First data to pass
data2	Second data to pass
ctx	Interrupted context

Returns

This function does not return.

Note

The parent partition should resume the caller on its own

inb()

uint8_t inb

(

uint16_t

port

)

IO port read byte.

In operation on 1-byte value.

Parameters

port	The port number

Returns

The value returned by the IO operation

inbGlue()

uint32_t inbGlue	(	gate_ctx_t *	ctx,
		uint32_t	port
	)

Glue function for inb callgate.

Parameters

port	Target IO port
ctx	Interrupted context

Returns

IO port read value

Note

Trigger a fault in parent partition if not authorized

inl()

uint32_t inl

(

uint16_t

port

)

In operation on a 4-bytes value.

Parameters

port	The port number

Returns

The value returned by the IO operation

inlGlue()

uint32_t inlGlue	(	gate_ctx_t *	ctx,
		uint32_t	port
	)

Glue function for inl callgate.

Parameters

port	Target IO port
ctx	Interrupted context

Returns

IO port read value

Note

Trigger a fault in parent partition if not authorized

inw()

uint16_t inw

(

uint16_t

port

)

IO port read word.

In operation on a 2-bytes value.

Parameters

port	The port number

Returns

The value returned by the IO operation

inwGlue()

uint32_t inwGlue	(	gate_ctx_t *	ctx,
		uint32_t	port
	)

Glue function for inw callgate.

Parameters

port	Target IO port
ctx	Interrupted context

Returns

IO port read value

Note

Trigger a fault in parent partition if not authorized

ioAccessValid()

static uint32_t ioAccessValid ( uint16_t  port )

static

outaddrlGlue()

void outaddrlGlue	(	gate_ctx_t *	ctx,
		uint32_t	port,
		uint32_t	value
	)

Glue function for outaddrl callgate.

Parameters

port	Target IO port
value	The value to write
ctx	Interrupted context

Note

Trigger a fault in parent partition if not authorized

outb()

void outb	(	uint16_t	port,
		uint8_t	value
	)

IO port write byte.

Out operation on 1-byte value.

Parameters

port	The port number
value	The value to write

outbGlue()

void outbGlue	(	gate_ctx_t *	ctx,
		uint32_t	port,
		uint32_t	value
	)

Glue function for outb callgate.

Parameters

port	Target IO port
value	The value to write
ctx	Interrupted context

Note

Trigger a fault in parent partition if not authorized

outl()

void outl	(	uint16_t	port,
		uint32_t	value
	)

Out operation on 4-byte value.

Parameters

port	The port number
value	The value to write

outlGlue()

void outlGlue	(	gate_ctx_t *	ctx,
		uint32_t	port,
		uint32_t	value
	)

Glue function for outl callgate.

Parameters

port	Target IO port
value	The value to write
ctx	Interrupted context

Note

Trigger a fault in parent partition if not authorized

outw()

void outw	(	uint16_t	port,
		uint16_t	value
	)

IO port write word.

Out operation on 2-byte value.

Parameters

port	The port number
value	The value to write

outwGlue()

void outwGlue	(	gate_ctx_t *	ctx,
		uint32_t	port,
		uint32_t	value
	)

Glue function for outw callgate.

Parameters

port	Target IO port
value	The value to write
ctx	Interrupted context

Note

Trigger a fault in parent partition if not authorized

timerGlue()

uint32_t timerGlue

(

void

)

Glue function for timer callgate.

Returns

Current timer ticks