minix/servers/vm/vm.h

#define NO_MEM ((phys_clicks) 0)  /* returned by alloc_mem() with mem is up */

/* Memory flags to pt_allocmap() and alloc_mem(). */
#define PAF_CLEAR	0x01	/* Clear physical memory. */
#define PAF_CONTIG	0x02	/* Physically contiguous. */
#define PAF_ALIGN64K	0x04	/* Aligned to 64k boundary. */
#define PAF_LOWER16MB	0x08
#define PAF_LOWER1MB	0x10

/* special value for v in pt_allocmap */
#define AM_AUTO         ((u32_t) -1)

#define CLICK2ABS(v) ((v) << CLICK_SHIFT)
#define ABS2CLICK(a) ((a) >> CLICK_SHIFT)

/* Compile in asserts and custom sanity checks at all? */
#define SANITYCHECKS	0
#define VMSTATS		0

/* Minimum stack region size - 64MB. */
#define MINSTACKREGION	(64*1024*1024)

/* If so, this level: */
#define SCL_NONE	0	/* No sanity checks - vm_assert()s only. */
#define SCL_TOP		1	/* Main loop and other high-level places. */
#define SCL_FUNCTIONS	2	/* Function entry/exit. */
#define SCL_DETAIL	3	/* Detailled steps. */
#define SCL_MAX		3	/* Highest value. */

/* Type of page allocations. */
#define VMP_SPARE	0
#define VMP_PAGETABLE	1
#define VMP_PAGEDIR	2
#define VMP_SLAB	3
#define VMP_CATEGORIES	4

/* Flags to pt_writemap(). */
#define WMF_OVERWRITE		0x01	/* Caller knows map may overwrite. */
#define WMF_WRITEFLAGSONLY	0x02	/* Copy physaddr and update flags. */
#define WMF_FREE		0x04	/* Free pages overwritten. */
#define WMF_VERIFY		0x08	/* Check pagetable contents. */

#define MAP_NONE	0xFFFFFFFE