| 1 | /*
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| 2 | * Copyright (c) 2013 Jakub Klama
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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 sparc32boot
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| 30 | * @{
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| 31 | */
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| 32 | /** @file
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| 33 | * @brief Memory management used while booting the kernel.
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| 34 | *
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| 35 | * So called "section" paging is used while booting the kernel. The term
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| 36 | * "section" comes from the ARM architecture specification and stands for the
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| 37 | * following: one-level paging, 1MB sized pages, 4096 entries in the page
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| 38 | * table.
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| 39 | */
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| 40 |
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| 41 | #ifndef BOOT_sparc32_MM_H
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| 42 | #define BOOT_sparc32_MM_H
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| 43 |
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| 44 | #include <typedefs.h>
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| 45 |
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| 46 | #define PAGE_SIZE (1 << 12)
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| 47 |
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| 48 | typedef struct {
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| 49 | uint32_t pa;
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| 50 | uint32_t size;
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| 51 | uint32_t va;
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| 52 | uint32_t cacheable;
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| 53 | } section_mapping_t;
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| 54 |
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| 55 | typedef struct {
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| 56 | unsigned int ppn : 24;
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| 57 | unsigned int cacheable : 1;
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| 58 | unsigned int modified : 1;
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| 59 | unsigned int referenced : 1;
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| 60 | unsigned int acc : 3;
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| 61 | unsigned int et : 2;
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| 62 | } __attribute__((packed)) pte_t;
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| 63 |
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| 64 | extern pte_t boot_pt[PTL0_ENTRIES];
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| 65 |
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| 66 | extern void mmu_init(void);
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| 67 |
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| 68 | #define PTE_ET_DESCRIPTOR 1
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| 69 | #define PTE_ET_ENTRY 2
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| 70 | #define PTE_ACC_RWX 3
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| 71 | #define MMU_CONTROL_EN (1 << 0)
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| 72 |
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| 73 | #endif
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| 74 |
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| 75 | /** @}
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| 76 | */
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