common.h

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/* SCCSID @(#)common.h	1.4 12/3/97 */ 


/************************************************************
 * common.h contains general definitions and global variables
 * declaration, always include as 1st header in all files
 ************************************************************/
#ifndef _COMMON_H_ 
#define _COMMON_H_

/*
 * **************** General Definitions ****************
 */
#ifdef MAIN
#define GBLDEF(name,value)      name = value
#define GBLDEF_0(name,value)      name
#else
#define GBLDEF(name,value)      extern name
#define GBLDEF_0(name,value)    extern name
#endif

#ifndef FAKE
register int reg0 asm("r0");
#endif

#define cat2(i,j)       i##j
#define cat3(i,j,k)     i##j##k

#define max2(a,b)	((a)>(b)?(a):(b))
#define max3(a,b,c)	max2(max2(a,b),c)

#ifndef FAKE
#define PROTECT(a)      do {mvd[riface_irqsuppress] = 0;\
			asm("nop"); asm("nop"); a;} while (0)

register volatile int *mvd asm("r27");
#else
#define PROTECT(a)      (a)
#define dram(a)         (a)
#define dram_cached(a)  (a)
#endif

/************************************************************
 * addressing conversion goodies.
 * a2x, a2y pair convert linear address to components used in dmax and dmay.
 * xy2a convert a 2d coordinate(x,y) with width to a linear address.
 * placed here because both riscbus.h and vp.h shares it.
 ************************************************************/
#define	a2x(a)	((a) & 0x1ff)
#define	a2y(a)	((a) >> 9)
#define xy2a(x,y,width) ((y)*(width)+(x))

/************************************************************
 * for portability reason
 ************************************************************/
#define uchar	unsigned char
#define ushort	unsigned short
#define uint	unsigned

/************************************************************
 * classifier for public functions
 ************************************************************/
#define EXPORT    	extern
#define IMPORT          extern
#define PUBLIC
#define	PRIVATE		static


#define GLBTIMER 1
#define CODEIR   2
#define TIMERHIT 3
#define VBV_START 4

extern int mvd_version;
extern unsigned int get_global_variable();

typedef void           (*PFV)();       /* Pointer to func. returning   
					*/
#endif /* _COMMON_H_ */