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| Rev | Author | Line No. | Line |
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| 2128 | jermar | 1 | /* |
| 2238 | kebrt | 2 | * Copyright (c) 2007 Pavel Jancik, Michal Kebrt |
| 2128 | jermar | 3 | * All rights reserved. |
| 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 | |||
| 29 | /** @addtogroup arm32mm |
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| 30 | * @{ |
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| 31 | */ |
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| 32 | /** @file |
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| 2410 | stepan | 33 | * @brief Paging related functions. |
| 2128 | jermar | 34 | */ |
| 35 | |||
| 36 | #include <arch/mm/page.h> |
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| 37 | #include <genarch/mm/page_pt.h> |
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| 38 | #include <mm/page.h> |
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| 2182 | jancik | 39 | #include <align.h> |
| 40 | #include <config.h> |
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| 2258 | jancik | 41 | #include <arch/exception.h> |
| 42 | #include <typedefs.h> |
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| 43 | #include <arch/types.h> |
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| 44 | #include <interrupt.h> |
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| 2352 | kebrt | 45 | #include <arch/mm/frame.h> |
| 2258 | jancik | 46 | |
| 2128 | jermar | 47 | |
| 2258 | jancik | 48 | /** |
| 49 | * Initializes kernel adress space page tables, sets abourts exceptions vectors |
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| 50 | */ |
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| 2128 | jermar | 51 | void page_arch_init(void) |
| 52 | { |
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| 2238 | kebrt | 53 | uintptr_t cur; |
| 2182 | jancik | 54 | int flags; |
| 55 | |||
| 2128 | jermar | 56 | page_mapping_operations = &pt_mapping_operations; |
| 2182 | jancik | 57 | |
| 58 | flags = PAGE_CACHEABLE; |
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| 2238 | kebrt | 59 | |
| 2290 | kebrt | 60 | // PA2KA(identity) mapping for all frames until last_frame |
| 2243 | kebrt | 61 | for (cur = 0; cur < last_frame; cur += FRAME_SIZE) { |
| 62 | page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags); |
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| 63 | } |
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| 2270 | jancik | 64 | |
| 2290 | kebrt | 65 | // create mapping for exception table at high offset |
| 2270 | jancik | 66 | #ifdef HIGH_EXCEPTION_VECTORS |
| 2361 | jancik | 67 | /* Note: this mapping cann't be done by hw_map because fixed |
| 68 | exception vector is stored at fixed virtual address |
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| 69 | reserve frame for exception table |
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| 70 | */ |
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| 2290 | kebrt | 71 | void* virtaddr = frame_alloc(ONE_FRAME, FRAME_KA); |
| 72 | page_mapping_insert(AS_KERNEL, EXC_BASE_ADDRESS, KA2PA(virtaddr), flags); |
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| 2361 | jancik | 73 | #else |
| 74 | #error "Only high eception vector supported now" |
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| 2270 | jancik | 75 | #endif |
| 2243 | kebrt | 76 | |
| 2263 | kebrt | 77 | as_switch(NULL, AS_KERNEL); |
| 2352 | kebrt | 78 | |
| 79 | boot_page_table_free(); |
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| 2128 | jermar | 80 | } |
| 81 | |||
| 2258 | jancik | 82 | /** |
| 83 | * Map device into kernel space. |
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| 84 | * |
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| 85 | * This function adds mapping of physical address that is read/write only |
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| 86 | * from kernel and not bufferable. |
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| 87 | * |
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| 2362 | jancik | 88 | * @param physaddr Physical addres where device is connected |
| 89 | * @param size Length of area where device is present |
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| 90 | * @return Virtual address where device will be accessable |
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| 2258 | jancik | 91 | */ |
| 2128 | jermar | 92 | uintptr_t hw_map(uintptr_t physaddr, size_t size) |
| 93 | { |
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| 2290 | kebrt | 94 | if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH)) { |
| 2258 | jancik | 95 | panic("Unable to map physical memory %p (%d bytes)", physaddr, size) |
| 2290 | kebrt | 96 | } |
| 2258 | jancik | 97 | |
| 98 | uintptr_t virtaddr = PA2KA(last_frame); |
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| 99 | pfn_t i; |
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| 2290 | kebrt | 100 | for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++) { |
| 101 | page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), physaddr + PFN2ADDR(i), |
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| 102 | PAGE_NOT_CACHEABLE | PAGE_READ | PAGE_WRITE | PAGE_KERNEL); |
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| 103 | } |
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| 2258 | jancik | 104 | |
| 105 | last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE); |
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| 106 | return virtaddr; |
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| 2128 | jermar | 107 | } |
| 108 | |||
| 2258 | jancik | 109 | |
| 2128 | jermar | 110 | /** @} |
| 111 | */ |
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| 2182 | jancik | 112 |