/*
Copyright 1990,1991,1992 Eric R. Smith. All rights reserved.
*/

#ifndef _mem_h
#define _mem_h

typedef struct memregion {
	long	loc;		/* base of memory region */
	ulong	len;		/* length of memory region */
	ushort	links;		/* number of users of region */
	ushort	mflags;		/* e.g. which map this came from */
	struct memregion *next; /* next region in memory map */
} MEMREGION;

/* dummy type for virtual addresses */
typedef struct vaddr {
	char dummy;
} *virtaddr;

/* flags for memory regions */
#define M_CORE		0x01		/* region came from core map */
#define M_ALT		0x02		/* region came from alt map */
#define M_SWAP		0x04		/* region came from swap map */
#define M_KER		0x08		/* region came from kernel map */
#define M_MAP		0x0f		/* and with this to pick out map */

#define M_KEEP		0x0100		/* don't free on process termination */

/* flags for curproc->memflags */
#define F_FASTLOAD	0x01		/* don't zero heap */
#define F_ALTLOAD	0x02		/* OK to load in alternate ram */
#define F_ALTALLOC	0x04		/* OK to malloc from alt. ram */

/* flags for Malloc/Mxalloc */
#define F_KEEP		0x4000		/* don't free memory on termination */

typedef MEMREGION **MMAP;
extern MMAP core, alt, ker, swap;

/* compilers differ on what "sizeof" returns */
#define SIZEOF		(long)sizeof

/* MiNT leaves this much memory for TOS to use
 */
#define TOS_MEM		(8*1024L)

/* MiNT tries to keep this much memory available for the kernel and other
 * programs when a program is launched
 */
#define KEEP_MEM	(8*1024L)

/*
 * how much memory should be allocated to the kernel?
 */
#define KERNEL_MEM	(24*1024L)

/* macro for rounding off region sizes */
#define MASKBITS	0xf
#define ROUND(size) ((size + MASKBITS) & ~MASKBITS)

#endif /* _mem_h */