packet.h File Reference

This module defines the ServiceHeader structure. This structure is used by all software components to send and receive packets. It defines the service header of each packets. More...

#include "../../include/kernel_pkg.h"

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Classes
struct	ServiceHeader
	This structure is in charge to defines the ServiceHeader field that can be filled by the software part when need to send a packet, or that will be read when the packet is received. More...
struct	ServiceHeaderSlot
	This structure is in charge to store a ServiceHeader slot memory space. More...

Macros
#define	CONSTANT_PKT_SIZE   13
	Constant Service Header size, based on the structure ServiceHeader.

Functions
ServiceHeader *	get_service_header_slot ()
void	init_service_header_slots ()
void	DMNI_read_data (unsigned int, unsigned int)
void	DMNI_send_data (unsigned int, unsigned int)
void	send_packet (ServiceHeader *, unsigned int, unsigned int)
void	read_packet (ServiceHeader *)

Detailed Description

This module defines the ServiceHeader structure. This structure is used by all software components to send and receive packets. It defines the service header of each packets.

HEMPS VERSION - 8.0 - support for RT applications

Distribution: June 2016

Created by: Marcelo Ruaro - contact: marce.nosp@m.lo.r.nosp@m.uaro@.nosp@m.acad.nosp@m..pucr.nosp@m.s.br

Research group: GAPH-PUCRS - contact: ferna.nosp@m.ndo..nosp@m.morae.nosp@m.s@pu.nosp@m.crs.b.nosp@m.r

Function Documentation

void DMNI_read_data	(	unsigned int	initial_address,
		unsigned int	dmni_msg_size
	)

Function that abstracts the DMNI programming for read data from NoC and copy to memory

Parameters

initial_address	Initial memory address to copy the received data
dmni_msg_size	Data size, is represented in memory word of 32 bits

void DMNI_send_data	(	unsigned int	initial_address,
		unsigned int	dmni_msg_size
	)

Function that abstracts the DMNI programming for send data from memory to NoC

Parameters

initial_address	Initial memory address that will be transmitted to NoC
dmni_msg_size	Data size, is represented in memory word of 32 bits

ServiceHeader* get_service_header_slot

(

)

Searches for a free ServiceHeaderSlot (sh_slot1 or sh_slot2) pointer. A free slot is the one which is not being used by DMNI. This function prevents that a given memory space be changed while its is not completely transmitted by DMNI.

Returns

A pointer to a free ServiceHeadeSlot

void init_service_header_slots

(

)

Initializes the service slots

void read_packet

(

ServiceHeader *

p

)

Function that abstracts the process to read a generic packet from NoC by programming the DMNI

Parameters

p	Packet pointer

void send_packet	(	ServiceHeader *	p,
		unsigned int	initial_address,
		unsigned int	dmni_msg_size
	)

Function that abstracts the process to send a generic packet to NoC by programming the DMNI

Parameters

p	Packet pointer
initial_address	Initial memory address of the packet payload (payload, not service header)

Returns

dmni_msg_size Packet payload size represented in memory words of 32 bits