#include <param.h>

`_ALIGNBYTES`

_ALIGNBYTES (sizeof(int) - 1)

Description

Round p (pointer or byte index) up to a correctly-aligned value for all data types (int, long, ...). The result is unsigned int and must be cast to any desired pointer type.

`PAGE_SHIFT`

PAGE_SHIFT 12

Description

LOG2(PAGE_SIZE)

`PAGE_SIZE`

PAGE_SIZE (1<<PAGE_SHIFT)

Description

bytes per page

`PDRSHIFT`

PDRSHIFT 22

Description

LOG2(NBPDR)

`IOPAGES`

IOPAGES 2

Description

pages of io permission bitmap

`VM_BCACHE_SIZE_MAX`

VM_BCACHE_SIZE_MAX (200 * 1024 * 1024)

Description

Ceiling on size of buffer cache