arch/mm/page.h

0001 /*
0002  * Copyright (c) 2005 Jakub Jermar
0003  * All rights reserved.
0004  *
0005  * Redistribution and use in source and binary forms, with or without
0006  * modification, are permitted provided that the following conditions
0007  * are met:
0008  *
0009  * - Redistributions of source code must retain the above copyright
0010  *   notice, this list of conditions and the following disclaimer.
0011  * - Redistributions in binary form must reproduce the above copyright
0012  *   notice, this list of conditions and the following disclaimer in the
0013  *   documentation and/or other materials provided with the distribution.
0014  * - The name of the author may not be used to endorse or promote products
0015  *   derived from this software without specific prior written permission.
0016  *
0017  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
0018  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
0019  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
0020  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
0021  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
0022  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
0023  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
0024  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
0025  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
0026  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
0027  */
0028
0029 /** @addtogroup RTEMSBSPsSPARC64mm
0030  * @{
0031  */
0032 /** @file
0033  */
0034
0035 #ifndef KERN_sparc64_PAGE_H_
0036 #define KERN_sparc64_PAGE_H_
0037
0038 #include <arch/mm/frame.h>
0039
0040 /*
0041  * On the TLB and TSB level, we still use 8K pages, which are supported by the
0042  * MMU.
0043  */
0044 #define MMU_PAGE_WIDTH  MMU_FRAME_WIDTH
0045 #define MMU_PAGE_SIZE   MMU_FRAME_SIZE
0046
0047 /*
0048  * On the page table level, we use 16K pages. 16K pages are not supported by
0049  * the MMU but we emulate them with pairs of 8K pages.
0050  */
0051 #define PAGE_WIDTH  FRAME_WIDTH
0052 #define PAGE_SIZE   FRAME_SIZE
0053
0054 #define MMU_PAGES_PER_PAGE  (1 << (PAGE_WIDTH - MMU_PAGE_WIDTH))
0055
0056 #ifdef KERNEL
0057
0058 #ifndef __ASM__
0059
0060 #include <arch/interrupt.h>
0061
0062 extern uintptr_t physmem_base;
0063
0064 #define KA2PA(x)    (((uintptr_t) (x)) + physmem_base)
0065 #define PA2KA(x)    (((uintptr_t) (x)) - physmem_base)
0066
0067 typedef union {
0068     uintptr_t address;
0069     struct {
0070         uint64_t vpn : 51;      /**< Virtual Page Number. */
0071         unsigned offset : 13;       /**< Offset. */
0072     } __attribute__ ((packed));
0073 } page_address_t;
0074
0075 extern void page_arch_init(void);
0076
0077 #endif /* !def __ASM__ */
0078
0079 #endif /* KERNEL */
0080
0081 #endif
0082
0083 /** @}
0084  */