| 1 | /*
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| 2 | * Copyright (c) 2005 Jakub Jermar
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup sparc64mm
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| 30 | * @{
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| 31 | */
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| 32 | /** @file
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| 33 | */
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| 34 |
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| 35 | #ifndef KERN_sparc64_FRAME_H_
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| 36 | #define KERN_sparc64_FRAME_H_
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| 37 |
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| 38 | /*
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| 39 | * Page size supported by the MMU.
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| 40 | * For 8K there is the nasty illegal virtual aliasing problem.
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| 41 | * Therefore, the kernel uses 8K only internally on the TLB and TSB levels.
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| 42 | */
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| 43 | #define MMU_FRAME_WIDTH 13 /* 8K */
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| 44 | #define MMU_FRAME_SIZE (1 << MMU_FRAME_WIDTH)
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| 45 |
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| 46 | /*
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| 47 | * Page size exported to the generic memory management subsystems.
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| 48 | * This page size is not directly supported by the MMU, but we can emulate
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| 49 | * each 16K page with a pair of adjacent 8K pages.
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| 50 | */
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| 51 | #define FRAME_WIDTH 14 /* 16K */
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| 52 | #define FRAME_SIZE (1 << FRAME_WIDTH)
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| 53 |
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| 54 | #ifdef KERNEL
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| 55 | #ifndef __ASM__
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| 56 |
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| 57 | #include <arch/types.h>
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| 58 |
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| 59 | union frame_address {
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| 60 | uintptr_t address;
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| 61 | struct {
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| 62 | unsigned : 23;
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| 63 | uint64_t pfn : 28; /**< Physical Frame Number. */
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| 64 | unsigned offset : 13; /**< Offset. */
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| 65 | } __attribute__ ((packed));
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| 66 | };
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| 67 |
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| 68 | typedef union frame_address frame_address_t;
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| 69 |
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| 70 | extern uintptr_t last_frame;
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| 71 | extern void frame_arch_init(void);
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| 72 |
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| 73 | #endif
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| 74 | #endif
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| 75 |
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| 76 | #endif
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| 77 |
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| 78 | /** @}
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| 79 | */
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