source: trunk/minix/include/sys/vm.h@ 21

/*
sys/vm.h
*/

#define PAGE_SIZE       4096

/* MIOCMAP */
struct mapreq
{
        void *base;
        size_t size;
        off_t offset;
        int readonly;
};

/* i386 paging constants */
#define I386_VM_PRESENT 0x001   /* Page is present */
#define I386_VM_WRITE   0x002   /* Read/write access allowed */
#define I386_VM_USER    0x004   /* User access allowed */
#define I386_VM_PWT     0x008   /* Write through */
#define I386_VM_PCD     0x010   /* Cache disable */
#define I386_VM_ADDR_MASK 0xFFFFF000 /* physical address */

#define I386_VM_PT_ENT_SIZE     4       /* Size of a page table entry */
#define I386_VM_DIR_ENTRIES     1024    /* Number of entries in a page dir */
#define I386_VM_DIR_ENT_SHIFT   22      /* Shift to get entry in page dir. */
#define I386_VM_PT_ENT_SHIFT    12      /* Shift to get entry in page table */
#define I386_VM_PT_ENT_MASK     0x3FF   /* Mask to get entry in page table */

#define I386_CR0_PG             0x80000000      /* Enable paging */