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| Rev | Author | Line No. | Line |
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| 191 | decky | 1 | /* |
| 2 | * Copyright (C) 2005 Martin Decky |
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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 | |||
| 29 | #include <arch/mm/memory_init.h> |
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| 30 | #include <arch/drivers/ofw.h> |
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| 31 | #include <panic.h> |
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| 32 | |||
| 33 | #define MEMMAP_MAX_RECORDS 32 |
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| 34 | |||
| 35 | typedef struct { |
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| 36 | __u32 start; |
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| 37 | __u32 size; |
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| 38 | } memmap_t; |
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| 39 | |||
| 40 | size_t get_memory_size(void) |
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| 41 | { |
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| 42 | phandle handle = ofw_find_device("/memory"); |
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| 43 | if (handle == -1) |
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| 44 | panic("No RAM\n"); |
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| 45 | |||
| 46 | memmap_t memmap[MEMMAP_MAX_RECORDS]; |
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| 47 | size_t ret = ofw_get_property(handle, "reg", &memmap, sizeof(memmap)); |
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| 48 | if (ret == -1) |
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| 49 | panic("Device /memory has no reg property\n"); |
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| 50 | |||
| 51 | size_t total; |
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| 52 | int i; |
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| 53 | |||
| 54 | for (i = 0; i < MEMMAP_MAX_RECORDS; i++) { |
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| 55 | if (memmap[i].size == 0) |
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| 56 | break; |
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| 57 | total += memmap[i].size; |
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| 58 | } |
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| 59 | |||
| 60 | return total; |
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| 61 | } |