/tmp/l4check/full_tree/trunk/l4/pkg/generic_io/lib/clientlib/req_rel.c File Reference

L4Env I/O Client Library Request/Release Wrapper. More...

#include <l4/sys/types.h>
#include <l4/env/errno.h>
#include <l4/l4rm/l4rm.h>
#include <l4/generic_io/libio.h>
#include "internal.h"
#include "__macros.h"

Go to the source code of this file.

Functions
l4_addr_t	l4io_request_mem_region (l4_addr_t start, l4_size_t len, int flags)
	Request I/O memory region.
int	l4io_search_mem_region (l4_addr_t addr, l4_addr_t *start, l4_size_t *len)
	Search I/O memory region for an address.
int	l4io_request_region (l4_uint16_t start, l4_uint16_t length)
	Request I/O port region.
int	l4io_release_mem_region (l4_addr_t start, l4_size_t len)
	Release I/O memory region.
int	l4io_release_region (l4_uint16_t start, l4_uint16_t len)
	Release I/O port region.
int	l4io_request_dma (unsigned int channel)
	Request ISA DMA channel.
int	l4io_release_dma (unsigned int channel)
	Release ISA DMA channel.

---

Detailed Description

L4Env I/O Client Library Request/Release Wrapper.

Date:

2007-03-23

Author:

Christian Helmuth <ch12@os.inf.tu-dresden.de>

Definition in file req_rel.c.

---

Function Documentation

int l4io_release_dma

(

unsigned int

channel

)

Release ISA DMA channel.

Parameters:

channel

ISA DMA channel number

Returns:

0 on success; negative error code otherwise

Test:

krishna: Not yet implemented.

Definition at line 210 of file req_rel.c.

int l4io_release_mem_region	(	l4_addr_t	start,
		l4_size_t	len
	)

Release I/O memory region.

Parameters:

	start	begin of port region
	len	size of port region

Returns:

0 on success; negative error code otherwise

Todo:

undo area reservation at l4rm but we need the area id for [start, start+len] here

Definition at line 147 of file req_rel.c.

int l4io_release_region	(	l4_uint16_t	start,
		l4_uint16_t	len
	)

Release I/O port region.

Parameters:

	start	begin of port region
	len	size of port region

Returns:

0 on success; negative error code otherwise

Definition at line 170 of file req_rel.c.

int l4io_request_dma

(

unsigned int

channel

)

Request ISA DMA channel.

Parameters:

channel

ISA DMA channel number

Returns:

0 on success; negative error code otherwise

Test:

krishna: Not yet implemented.

Definition at line 194 of file req_rel.c.

l4_addr_t l4io_request_mem_region	(	l4_addr_t	start,
		l4_size_t	len,
		int	flags
	)

Request I/O memory region.

Parameters:

	start	begin of mem region
	len	size of mem region

Return values:

offset

offset within memory region

Returns:

virtual address of mapped region; 0 on error

Definition at line 39 of file req_rel.c.

int l4io_request_region	(	l4_uint16_t	start,
		l4_uint16_t	length
	)

Request I/O port region.

Parameters:

	start	begin of port region
	len	size of port region

Returns:

0 on success; negative error code otherwise

Definition at line 117 of file req_rel.c.

int l4io_search_mem_region	(	l4_addr_t	addr,
		l4_addr_t *	start,
		l4_size_t *	len
	)

Search I/O memory region for an address.

Parameters:

addr

Address to search for

Return values:

	start	Start of memory region if found
	len	Length of memory region if found.

Returns:

0 on success; negative error code otherwise

Definition at line 92 of file req_rel.c.