RTEMS: bsps/sparc64/include/arch/mm/sun4u/frame.h Source File

| RTEMS 5.4-rc2

Loading...
Searching...
No Matches
frame.h
Go to the documentation of this file.
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_SUN4U_FRAME_H_
36#define KERN_sparc64_SUN4U_FRAME_H_
37
38/*
39 * Page size supported by the MMU.
40 * For 8K there is the nasty illegal virtual aliasing problem.
41 * Therefore, the kernel uses 8K only internally on the TLB and TSB levels.
42 */
43#define MMU_FRAME_WIDTH 13 /* 8K */
44#define MMU_FRAME_SIZE (1 << MMU_FRAME_WIDTH)
45
46/*
47 * Page size exported to the generic memory management subsystems.
48 * This page size is not directly supported by the MMU, but we can emulate
49 * each 16K page with a pair of adjacent 8K pages.
50 */
51#define FRAME_WIDTH 14 /* 16K */
52#define FRAME_SIZE (1 << FRAME_WIDTH)
53
54#ifdef KERNEL
55#ifndef __ASM__
56
57#include <arch/types.h>
58
59union frame_address {
60 uintptr_t address;
61 struct {
62#if defined (US)
63 unsigned : 23;
64 uint64_t pfn : 28;
65#elif defined (US3)
66 unsigned : 21;
67 uint64_t pfn : 30;
68#endif
69 unsigned offset : 13;
70 } __attribute__ ((packed));
71};
72
73typedef union frame_address frame_address_t;
74
75extern uintptr_t last_frame;
76extern uintptr_t end_of_identity;
77
78extern void frame_arch_init(void);
79#define physmem_print()
80
81#endif
82#endif
83
84#endif
85
__attribute__
Definition: jffs2.h:92