RTEMS: bsps/sparc64/include/arch/mm/page.h Source File

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page.h
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1/*
2 * Copyright (c) 2005 Jakub Jermar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
35#ifndef KERN_sparc64_PAGE_H_
36#define KERN_sparc64_PAGE_H_
37
38#include <arch/mm/frame.h>
39
40/*
41 * On the TLB and TSB level, we still use 8K pages, which are supported by the
42 * MMU.
43 */
44#define MMU_PAGE_WIDTH MMU_FRAME_WIDTH
45#define MMU_PAGE_SIZE MMU_FRAME_SIZE
46
47/*
48 * On the page table level, we use 16K pages. 16K pages are not supported by
49 * the MMU but we emulate them with pairs of 8K pages.
50 */
51#define PAGE_WIDTH FRAME_WIDTH
52#define PAGE_SIZE FRAME_SIZE
53
54#define MMU_PAGES_PER_PAGE (1 << (PAGE_WIDTH - MMU_PAGE_WIDTH))
55
56#ifdef KERNEL
57
58#ifndef __ASM__
59
60#include <arch/interrupt.h>
61
62extern uintptr_t physmem_base;
63
64#define KA2PA(x) (((uintptr_t) (x)) + physmem_base)
65#define PA2KA(x) (((uintptr_t) (x)) - physmem_base)
66
67typedef union {
68 uintptr_t address;
69 struct {
70 uint64_t vpn : 51;
71 unsigned offset : 13;
72 } __attribute__ ((packed));
73} page_address_t;
74
75extern void page_arch_init(void);
76
77#endif /* !def __ASM__ */
78
79#endif /* KERNEL */
80
81#endif
82
frame.h
__attribute__
Definition: jffs2.h:92
vpn
uint64_t vpn
Definition: tlb.h:0