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 /* 67 * unmap a single 4K page at VA 68 */ 69 extern void kbm_unmap(uintptr_t va); 70 71 /* 72 * Remap a single 4K page at VA (always PROT_READ|PROT_WRITE). 73 * Returns the pfn of the old mapping. 74 */ 75 extern pfn_t kbm_remap(uintptr_t va, pfn_t pfn); 76 77 /* 78 * Make a page mapping read only 79 */ 80 extern void kbm_read_only(uintptr_t va, paddr_t pa); 81 82 83 /* 84 * interface for kmdb to map a physical page, stack is only 1 deep 85 */ 86 extern void *kbm_push(paddr_t pa); 87 extern void kbm_pop(void); 88 89 /* 90 * These are needed by mmu_init() 91 */ 92 extern int kbm_nx_support; 93 extern int kbm_pae_support; 94 extern int kbm_largepage_support; 95 96 /* 97 * The size of memory mapped for the initial kernel nucleus text 98 * and data regions setup by the boot loader. needed for startup 99 */ 100 extern uint_t kbm_nucleus_size; 101 102 #ifdef __cplusplus 103 } 104 #endif 105 106 #endif /* _KBOOT_MMU_H */ 107