RTEMS  5.0.0
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 
62 extern uintptr_t physmem_base;
63 
64 #define KA2PA(x) (((uintptr_t) (x)) + physmem_base)
65 #define PA2KA(x) (((uintptr_t) (x)) - physmem_base)
66 
67 typedef union {
68  uintptr_t address;
69  struct {
70  uint64_t vpn : 51;
71  unsigned offset : 13;
72  } __attribute__ ((packed));
73 } page_address_t;
74 
75 extern void page_arch_init(void);
76 
77 #endif /* !def __ASM__ */
78 
79 #endif /* KERNEL */
80 
81 #endif
82 
uint64_t vpn
Definition: tlb.h:180
typedef __attribute__
Disable IRQ Interrupts.
Definition: cmsis_gcc.h:69