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Annotation of sys/arch/sh/include/pmap.h, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: pmap.h,v 1.2 2007/03/05 21:48:21 miod Exp $   */
                      2: /*     $NetBSD: pmap.h,v 1.28 2006/04/10 23:12:11 uwe Exp $    */
                      3:
                      4: /*-
                      5:  * Copyright (c) 2002 The NetBSD Foundation, Inc.
                      6:  * All rights reserved.
                      7:  *
                      8:  * This code is derived from software contributed to The NetBSD Foundation
                      9:  * by UCHIYAMA Yasushi.
                     10:  *
                     11:  * Redistribution and use in source and binary forms, with or without
                     12:  * modification, are permitted provided that the following conditions
                     13:  * are met:
                     14:  * 1. Redistributions of source code must retain the above copyright
                     15:  *    notice, this list of conditions and the following disclaimer.
                     16:  * 2. Redistributions in binary form must reproduce the above copyright
                     17:  *    notice, this list of conditions and the following disclaimer in the
                     18:  *    documentation and/or other materials provided with the distribution.
                     19:  * 3. All advertising materials mentioning features or use of this software
                     20:  *    must display the following acknowledgement:
                     21:  *        This product includes software developed by the NetBSD
                     22:  *        Foundation, Inc. and its contributors.
                     23:  * 4. Neither the name of The NetBSD Foundation nor the names of its
                     24:  *    contributors may be used to endorse or promote products derived
                     25:  *    from this software without specific prior written permission.
                     26:  *
                     27:  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
                     28:  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
                     29:  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
                     30:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
                     31:  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
                     32:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
                     33:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
                     34:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
                     35:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
                     36:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
                     37:  * POSSIBILITY OF SUCH DAMAGE.
                     38:  */
                     39:
                     40: /*
                     41:  * OpenBSD/sh pmap:
                     42:  *     pmap.pm_ptp[512] ... 512 slot of page table page
                     43:  *     page table page contains 1024 PTEs. (PAGE_SIZE / sizeof(pt_entry_t))
                     44:  *       | PTP 11bit | PTOFSET 10bit | PGOFSET 12bit |
                     45:  */
                     46:
                     47: #ifndef _SH_PMAP_H_
                     48: #define        _SH_PMAP_H_
                     49: #include <sys/queue.h>
                     50: #include <sh/pte.h>
                     51:
                     52: #define        PMAP_STEAL_MEMORY
                     53: #define        PMAP_GROWKERNEL
                     54:
                     55: #define        __PMAP_PTP_N    512     /* # of page table page maps 2GB. */
                     56: typedef struct pmap {
                     57:        pt_entry_t **pm_ptp;
                     58:        int pm_asid;
                     59:        int pm_refcnt;
                     60:        struct pmap_statistics  pm_stats;       /* pmap statistics */
                     61: } *pmap_t;
                     62: extern struct pmap __pmap_kernel;
                     63:
                     64: void pmap_bootstrap(void);
                     65: void pmap_proc_iflush(struct proc *, vaddr_t, size_t);
                     66: #define        pmap_unuse_final(p)             do { /* nothing */ } while (0)
                     67: #define        pmap_kernel()                   (&__pmap_kernel)
                     68: #define        pmap_deactivate(pmap)           do { /* nothing */ } while (0)
                     69: #define        pmap_update(pmap)               do { /* nothing */ } while (0)
                     70: #define        pmap_copy(dp,sp,d,l,s)          do { /* nothing */ } while (0)
                     71: #define        pmap_collect(pmap)              do { /* nothing */ } while (0)
                     72: #define        pmap_wired_count(pmap)          ((pmap)->pm_stats.wired_count)
                     73: #define        pmap_resident_count(pmap)       ((pmap)->pm_stats.resident_count)
                     74: #define        pmap_phys_address(frame)        ((paddr_t)(ptoa(frame)))
                     75:
                     76: /* ARGSUSED */
                     77: static __inline void
                     78: pmap_remove_all(struct pmap *pmap)
                     79: {
                     80:        /* Nothing. */
                     81: }
                     82:
                     83: /*
                     84:  * pmap_prefer() helps to avoid virtual cache aliases on SH4 CPUs
                     85:  * which have the virtually-indexed cache.
                     86:  */
                     87: #ifdef SH4
                     88: #define        PMAP_PREFER(pa, va)             pmap_prefer((pa), (va))
                     89: void pmap_prefer(vaddr_t, vaddr_t *);
                     90: #endif /* SH4 */
                     91:
                     92: #define        __HAVE_PMAP_DIRECT
                     93: #define        pmap_map_direct(pg)             SH3_PHYS_TO_P1SEG(VM_PAGE_TO_PHYS(pg))
                     94: #define        pmap_unmap_direct(va)           PHYS_TO_VM_PAGE(SH3_P1SEG_TO_PHYS((va)))
                     95:
                     96: /* MD pmap utils. */
                     97: pt_entry_t *__pmap_pte_lookup(pmap_t, vaddr_t);
                     98: pt_entry_t *__pmap_kpte_lookup(vaddr_t);
                     99: boolean_t __pmap_pte_load(pmap_t, vaddr_t, int);
                    100: #endif /* !_SH_PMAP_H_ */