| 1 | /*
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| 2 | * Copyright (c) 2007 Pavel Jancik, Michal Kebrt
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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 arm32mm
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| 30 | * @{
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| 31 | */
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| 32 | /** @file
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| 33 | * @brief Frame related functions.
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| 34 | */
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| 35 |
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| 36 | #include <mm/frame.h>
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| 37 | #include <arch/mm/frame.h>
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| 38 | #include <arch/machine_func.h>
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| 39 | #include <config.h>
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| 40 | #include <align.h>
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| 41 |
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| 42 | /** Address of the last frame in the memory. */
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| 43 | uintptr_t last_frame = 0;
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| 44 |
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| 45 | /** Creates memory zones. */
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| 46 | void frame_arch_init(void)
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| 47 | {
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| 48 | uintptr_t mem_start, mem_size;
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| 49 | uintptr_t first_frame;
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| 50 | uintptr_t num_frames;
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| 51 |
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| 52 | machine_get_memory_extents(&mem_start, &mem_size);
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| 53 | first_frame = ALIGN_UP(mem_start, FRAME_SIZE);
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| 54 | last_frame = ALIGN_DOWN(mem_start + mem_size, FRAME_SIZE);
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| 55 | num_frames = (last_frame - first_frame) >> FRAME_WIDTH;
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| 56 |
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| 57 | /* All memory as one zone */
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| 58 | zone_create(first_frame >> FRAME_WIDTH, num_frames,
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| 59 | BOOT_PAGE_TABLE_START_FRAME + BOOT_PAGE_TABLE_SIZE_IN_FRAMES, 0);
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| 60 |
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| 61 | /* blacklist boot page table */
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| 62 | frame_mark_unavailable(BOOT_PAGE_TABLE_START_FRAME,
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| 63 | BOOT_PAGE_TABLE_SIZE_IN_FRAMES);
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| 64 |
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| 65 | machine_frame_init();
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| 66 | }
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| 67 |
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| 68 | /** Frees the boot page table. */
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| 69 | void boot_page_table_free(void)
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| 70 | {
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| 71 | unsigned int i;
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| 72 | for (i = 0; i < BOOT_PAGE_TABLE_SIZE_IN_FRAMES; i++)
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| 73 | frame_free(i * FRAME_SIZE + BOOT_PAGE_TABLE_ADDRESS);
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| 74 | }
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| 75 |
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| 76 | /** @}
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| 77 | */
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