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Rev | Author | Line No. | Line |
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424 | giacomo | 1 | /* Hook for machine specific memory setup. |
2 | * |
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3 | * This is included late in kernel/setup.c so that it can make use of all of |
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4 | * the static functions. */ |
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5 | |||
6 | #define MB (1024 * 1024) |
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7 | |||
8 | unsigned long sgivwfb_mem_phys; |
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9 | unsigned long sgivwfb_mem_size; |
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10 | |||
11 | long long mem_size __initdata = 0; |
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12 | |||
13 | static inline char * __init machine_specific_memory_setup(void) |
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14 | { |
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15 | long long gfx_mem_size = 8 * MB; |
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16 | |||
17 | mem_size = ALT_MEM_K; |
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18 | |||
19 | if (!mem_size) { |
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20 | printk(KERN_WARNING "Bootloader didn't set memory size, upgrade it !\n"); |
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21 | mem_size = 128 * MB; |
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22 | } |
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23 | |||
24 | /* |
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25 | * this hardcodes the graphics memory to 8 MB |
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26 | * it really should be sized dynamically (or at least |
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27 | * set as a boot param) |
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28 | */ |
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29 | if (!sgivwfb_mem_size) { |
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30 | printk(KERN_WARNING "Defaulting to 8 MB framebuffer size\n"); |
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31 | sgivwfb_mem_size = 8 * MB; |
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32 | } |
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33 | |||
34 | /* |
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35 | * Trim to nearest MB |
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36 | */ |
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37 | sgivwfb_mem_size &= ~((1 << 20) - 1); |
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38 | sgivwfb_mem_phys = mem_size - gfx_mem_size; |
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39 | |||
40 | add_memory_region(0, LOWMEMSIZE(), E820_RAM); |
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41 | add_memory_region(HIGH_MEMORY, mem_size - sgivwfb_mem_size - HIGH_MEMORY, E820_RAM); |
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42 | add_memory_region(sgivwfb_mem_phys, sgivwfb_mem_size, E820_RESERVED); |
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43 | |||
44 | return "PROM"; |
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45 | |||
46 | /* Remove gcc warnings */ |
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47 | (void) sanitize_e820_map(NULL, NULL); |
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48 | (void) copy_e820_map(NULL, 0); |
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49 | } |