xref: /illumos-gate/usr/src/uts/i86pc/vm/kboot_mmu.h (revision 2d6eb4a5)
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 #ifdef	__cplusplus
31 extern "C" {
32 #endif
33 
34 /*
35  * Kernel boot-time interfaces for handling MMU mappings before the HAT proper
36  * is running (i.e. before khat_running is set).
37  */
38 
39 #include <sys/mach_mmu.h>
40 
41 struct xboot_info;
42 
43 extern void kbm_init(struct xboot_info *);
44 
45 /*
46  * Interface to remap the page table window, also used by HAT during init.
47  */
48 extern void *kbm_remap_window(paddr_t physaddr, int writeable);
49 
50 /*
51  * Find the next mapping at or above VA, if found returns non-zero and sets:
52  * - va : virtual address
53  * - pfn : pfn of real address
54  * - size : pagesize of the mapping
55  * - prot : protections
56  */
57 extern int kbm_probe(uintptr_t *va, size_t *len, pfn_t *pfn, uint_t *prot);
58 
59 /*
60  * Add a new mapping
61  */
62 extern void kbm_map(uintptr_t va, paddr_t pa, uint_t level, uint_t is_kernel);
63 
64 #ifdef __xpv
65 extern void kbm_map_ma(maddr_t ma, uintptr_t va, uint_t level);
66 #endif
67 
68 /*
69  * unmap a single 4K page at VA
70  */
71 extern void kbm_unmap(uintptr_t va);
72 
73 /*
74  * Remap a single 4K page at VA (always PROT_READ|PROT_WRITE).
75  * Returns the pfn of the old mapping.
76  */
77 extern pfn_t kbm_remap(uintptr_t va, pfn_t pfn);
78 
79 /*
80  * Make a page mapping read only
81  */
82 extern void kbm_read_only(uintptr_t va, paddr_t pa);
83 
84 
85 /*
86  * interface for kmdb to map a physical page, stack is only 1 deep
87  */
88 extern void *kbm_push(paddr_t pa);
89 extern void kbm_pop(void);
90 
91 /*
92  * These are needed by mmu_init()
93  */
94 extern int kbm_nx_support;
95 extern int kbm_pae_support;
96 extern int kbm_largepage_support;
97 
98 /*
99  * The size of memory mapped for the initial kernel nucleus text
100  * and data regions setup by the boot loader. needed for startup
101  */
102 extern uint_t kbm_nucleus_size;
103 
104 #ifdef	__cplusplus
105 }
106 #endif
107 
108 #endif	/* _KBOOT_MMU_H */
109