date and time created 92/06/15 06:28:24 by fujita

SCCS-vsn: sys/luna68k/include/pmap.h 7.1

diff --git a/usr/src/sys/luna68k/include/pmap.h b/usr/src/sys/luna68k/include/pmap.h
new file mode 100644 (file)
index 0000000..61ec091
--- /dev/null
+++ b/usr/src/sys/luna68k/include/pmap.h
@@ -0,0 +1,116 @@
+/* 
+ * Copyright (c) 1987 Carnegie-Mellon University
+ * Copyright (c) 1992 OMRON Corporation.
+ * Copyright (c) 1991, 1992 Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * the Systems Programming Group of the University of Utah Computer
+ * Science Department.
+ *
+ * %sccs.include.redist.c%
+ *
+ *     OMRON: $Id: pmap.h,v 1.2 92/06/14 06:29:43 moti Exp $
+ *
+ *     @(#)pmap.h      7.1 (Berkeley) %G%
+ */
+
+#ifndef        _PMAP_MACHINE_
+#define        _PMAP_MACHINE_
+
+#define LUNA_PAGE_SIZE NBPG
+#define LUNA_SEG_SIZE  NBSEG
+
+#define luna_trunc_seg(x)      (((unsigned)(x)) & ~(LUNA_SEG_SIZE-1))
+#define luna_round_seg(x)      luna_trunc_seg((unsigned)(x) + LUNA_SEG_SIZE-1)
+
+/*
+ * Pmap stuff
+ */
+struct pmap {
+       struct pte              *pm_ptab;       /* KVA of page table */
+       struct ste              *pm_stab;       /* KVA of segment table */
+       int                     pm_stchanged;   /* ST changed */
+       int                     pm_stfree;      /* 040: free lev2 blocks */
+       struct ste              *pm_stpa;       /* 040: ST phys addr */
+       short                   pm_sref;        /* segment table ref count */
+       short                   pm_count;       /* pmap reference count */
+       simple_lock_data_t      pm_lock;        /* lock on pmap */
+       struct pmap_statistics  pm_stats;       /* pmap statistics */
+       long                    pm_ptpages;     /* more stats: PT pages */
+};
+
+typedef struct pmap    *pmap_t;
+
+extern struct pmap     kernel_pmap_store;
+#define kernel_pmap (&kernel_pmap_store)
+
+/*
+ * On the 040 we keep track of which level 2 blocks are already in use
+ * with the pm_stfree mask.  Bits are arranged from LSB (block 0) to MSB
+ * (block 31).  For convenience, the level 1 table is considered to be
+ * block 0.
+ *
+ * MAX[KU]L2SIZE control how many pages of level 2 descriptors are allowed.
+ * for the kernel and users.  8 implies only the initial "segment table"
+ * page is used.  WARNING: don't change MAXUL2SIZE unless you can allocate
+ * physically contiguous pages for the ST in pmap.c!
+ */
+#define        MAXKL2SIZE      16
+#define MAXUL2SIZE     8
+#define l2tobm(n)      (1 << (n))
+#define        bmtol2(n)       (ffs(n) - 1)
+
+/*
+ * Macros for speed
+ */
+#define PMAP_ACTIVATE(pmapp, pcbp, iscurproc) \
+       if ((pmapp) != NULL && (pmapp)->pm_stchanged) { \
+               (pcbp)->pcb_ustp = \
+                   luna_btop(pmap_extract(kernel_pmap, \
+                       ((vm_offset_t)(pmapp)->pm_stab))); \
+               if (iscurproc) \
+                       loadustp((pcbp)->pcb_ustp); \
+               (pmapp)->pm_stchanged = FALSE; \
+       }
+#define PMAP_DEACTIVATE(pmapp, pcbp)
+
+/*
+ * For each vm_page_t, there is a list of all currently valid virtual
+ * mappings of that page.  An entry is a pv_entry_t, the list is pv_table.
+ */
+typedef struct pv_entry {
+       struct pv_entry *pv_next;       /* next pv_entry */
+       struct pmap     *pv_pmap;       /* pmap where mapping lies */
+       vm_offset_t     pv_va;          /* virtual address for mapping */
+       struct ste      *pv_ptste;      /* non-zero if VA maps a PT page */
+       struct pmap     *pv_ptpmap;     /* if pv_ptste, pmap for PT page */
+       int             pv_flags;       /* flags */
+} *pv_entry_t;
+
+#define        PV_CI           0x01    /* all entries must be cache inhibited */
+#define PV_PTPAGE      0x02    /* entry maps a page table page */
+
+#ifdef KERNEL
+pv_entry_t     pv_table;               /* array of entries, one per page */
+
+#define pa_index(pa)           atop(pa - vm_first_phys)
+#define pa_to_pvh(pa)          (&pv_table[pa_index(pa)])
+
+#define        pmap_resident_count(pmap)       ((pmap)->pm_stats.resident_count)
+
+extern struct pte *Sysmap;
+extern char *vmmap;                    /* map for mem, dumps, etc. */
+
+/*
+ * definitions LUNA IO space mapping
+ */
+struct physmap {
+       int pm_phys;
+       int pm_size;
+       int pm_cache;
+} ;
+
+#endif
+
+#endif _PMAP_MACHINE_