scratchring.h

这是一个intel网络处理器ixp24xx系列中微码例子。用汇编写的。可以参考一下。

//---------------------------------------------------------------------------
//
//                  I N T E L   P R O P R I E T A R Y
//
//     COPYRIGHT [c]  2004 BY  INTEL  CORPORATION.  ALL RIGHTS
//     RESERVED.   NO  PART  OF THIS PROGRAM  OR  PUBLICATION  MAY
//     BE  REPRODUCED,   TRANSMITTED,   TRANSCRIBED,   STORED  IN  A
//     RETRIEVAL SYSTEM, OR TRANSLATED INTO ANY LANGUAGE OR COMPUTER
//     LANGUAGE IN ANY FORM OR BY ANY MEANS, ELECTRONIC, MECHANICAL,
//     MAGNETIC,  OPTICAL,  CHEMICAL, MANUAL, OR OTHERWISE,  WITHOUT
//     THE PRIOR WRITTEN PERMISSION OF :
//
//                        INTEL  CORPORATION
//
//                     2200 MISSION COLLEGE BLVD
//
//               SANTA  CLARA,  CALIFORNIA  95052-8119
//
//---------------------------------------------------------------------------

#ifndef EXAMPLE_SCRATCH_RING_H
#define EXAMPLE_SCRATCH_RING_H

// Ring size [31:30]. Hardware representation
// 00 = 128
// 01 = 256
// 10 = 512
// 11 = 1024

#define RING_SIZE_128 		0
#define RING_SIZE_256		1
#define RING_SIZE_512		2
#define RING_SIZE_1024		3

// Valid values for RING_SIZE are 128, 256, 512 or 1024.

#define RING_SIZE			128

// Base Address for Scratch Ring is 0x1000. Should be aligned on a 4 byte boundary.

#define RING_BASE			0x1000

// Ring number to use. 0-15.

#define RING_NUMBER			0

// Eventhough 0-15 rings are possible, the "ring full"input state can be used
// only on rings 0-11. i.e SCR_Ring#_Full is valid only for # = 0-11.

#ifdef 	RING_NUMBER

#if (RING_NUMBER > 11)
#error			"For Ring Number Greater than 11, we cannot use the SCR_Ring#_Full input state. Check RING_NUMBER"
#else
#define_eval	RING_FULL			SCR_Ring/**/RING_NUMBER/**/_Full	
#endif

#endif	// RING_NUMBER

#define SIG_WAKE_THRD		1

// Signal to wakeup the consumer ME.

#define SIG_WAKE_CONS		2


#endif //EXAMPLE_SCRATCH_RING_H