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pmap.h revision 1.4 
      1 #ifndef	_PMAP_MACHINE_
      2 #define	_PMAP_MACHINE_
      3 
      4 /*
      5  * Pmap stuff
      6  * [some ideas borrowed from torek, but no code]
      7  */
      8 
      9 struct context_state {
     10     queue_chain_t  context_link;
     11     int            context_num;
     12     struct pmap   *context_upmap;
     13 };
     14 
     15 typedef struct context_state *context_t;
     16 
     17 struct pmap {
     18     int		                pm_refcount;	/* pmap reference count */
     19     simple_lock_data_t	        pm_lock;	/* lock on pmap */
     20     struct pmap_statistics	pm_stats;	/* pmap statistics */
     21     context_t                   pm_context;     /* context if any */
     22     int                         pm_version;
     23     unsigned char               *pm_segmap;
     24 };
     25 
     26 typedef struct pmap *pmap_t;
     27 
     28 extern pmap_t kernel_pmap;
     29 
     30 struct pmeg_state {
     31     queue_chain_t  pmeg_link;
     32     int            pmeg_index;
     33     pmap_t         pmeg_owner;
     34     int            pmeg_owner_version;
     35     vm_offset_t    pmeg_va;
     36     int            pmeg_wired_count;
     37     int            pmeg_reserved;
     38     int            pmeg_vpages;
     39 };
     40 
     41 typedef struct pmeg_state *pmeg_t;
     42 
     43 #define PMAP_ACTIVATE(pmap, pcbp, iscurproc) \
     44       pmap_activate(pmap, pcbp)
     45 #define PMAP_DEACTIVATE(pmap, pcbp) \
     46       pmap_deactivate(pmap, pcbp)
     47 
     48 #define	pmap_kernel()			(kernel_pmap)
     49 
     50 /* like the sparc port, use the lower bits of a pa which must be page
     51  *  aligned anyway to pass memtype, caching information.
     52  */
     53 #define PMAP_MMEM      0x0
     54 #define PMAP_OBIO      0x1
     55 #define PMAP_VME16D    0x2
     56 #define PMAP_VME32D    0x3
     57 #define PMAP_MEMMASK   0x3
     58 #define PMAP_NC        0x4
     59 #define PMAP_SPECMASK  0x7
     60 
     61 extern vm_offset_t virtual_avail, virtual_end;
     62 extern vm_offset_t avail_start, avail_end;
     63 
     64 #endif	_PMAP_MACHINE_
     65