arch/x86/kernel/platform/i86pc/include/vm/kboot_mmu.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #ifndef _KBOOT_MMU_H
  28 #define _KBOOT_MMU_H
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 #ifdef  __cplusplus
  33 extern "C" {
  34 #endif
  35
  36 /*
  37  * Kernel boot-time interfaces for handling MMU mappings before the HAT proper
  38  * is running (i.e. before khat_running is set).
  39  */
  40
  41 #include <sys/mach_mmu.h>
  42
  43 struct xboot_info;
  44
  45 extern void kbm_init(struct xboot_info *);
  46
  47 /*
  48  * Interface to remap the page table window, also used by HAT during init.
  49  */
  50 extern void *kbm_remap_window(paddr_t physaddr, int writeable);
  51
  52 /*
  53  * Find the next mapping at or above VA, if found returns non-zero and sets:
  54  * - va : virtual address
  55  * - pfn : pfn of real address
  56  * - size : pagesize of the mapping
  57  * - prot : protections
  58  */
  59 extern int kbm_probe(uintptr_t *va, size_t *len, pfn_t *pfn, uint_t *prot);
  60
  61 /*
  62  * Add a new mapping
  63  */
  64 extern void kbm_map(uintptr_t va, paddr_t pa, uint_t level, uint_t is_kernel);
  65
  66 #ifdef __xpv
  67 extern void kbm_map_ma(maddr_t ma, uintptr_t va, uint_t level);
  68 #endif
  69
  70 /*
  71  * unmap a single 4K page at VA
  72  */
  73 extern void kbm_unmap(uintptr_t va);
  74
  75 /*
  76  * Remap a single 4K page at VA (always PROT_READ|PROT_WRITE).
  77  * Returns the pfn of the old mapping.
  78  */
  79 extern pfn_t kbm_remap(uintptr_t va, pfn_t pfn);
  80
  81 /*
  82  * Make a page mapping read only
  83  */
  84 extern void kbm_read_only(uintptr_t va, paddr_t pa);
  85
  86
  87 /*
  88  * interface for kmdb to map a physical page, stack is only 1 deep
  89  */
  90 extern void *kbm_push(paddr_t pa);
  91 extern void kbm_pop(void);
  92
  93 /*
  94  * These are needed by mmu_init()
  95  */
  96 extern int kbm_nx_support;
  97 extern int kbm_pae_support;
  98 extern int kbm_largepage_support;
  99
 100 /*
 101  * The size of memory mapped for the initial kernel nucleus text
 102  * and data regions setup by the boot loader. needed for startup
 103  */
 104 extern uint_t kbm_nucleus_size;
 105
 106 #ifdef  __cplusplus
 107 }
 108 #endif
 109
 110 #endif  /* _KBOOT_MMU_H */