minix/servers/vm/vm.h

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#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. */
/* 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? */
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#define SANITYCHECKS 0
#define VMSTATS 1
/* 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. */
/* Special value of 'what' to map_page_region meaning: unknown. */
#define MAP_NONE 0xFFFFFFFE