50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
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/* Hook for machine specific memory setup.
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*
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* This is included late in kernel/setup.c so that it can make use of all of
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* the static functions. */
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#define MB (1024 * 1024)
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unsigned long sgivwfb_mem_phys;
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unsigned long sgivwfb_mem_size;
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long long mem_size __initdata = 0;
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static char * __init machine_specific_memory_setup(void)
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{
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long long gfx_mem_size = 8 * MB;
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mem_size = ALT_MEM_K;
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if (!mem_size) {
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printk(KERN_WARNING "Bootloader didn't set memory size, upgrade it !\n");
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mem_size = 128 * MB;
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}
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/*
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* this hardcodes the graphics memory to 8 MB
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* it really should be sized dynamically (or at least
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* set as a boot param)
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*/
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if (!sgivwfb_mem_size) {
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printk(KERN_WARNING "Defaulting to 8 MB framebuffer size\n");
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sgivwfb_mem_size = 8 * MB;
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}
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/*
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* Trim to nearest MB
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*/
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sgivwfb_mem_size &= ~((1 << 20) - 1);
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sgivwfb_mem_phys = mem_size - gfx_mem_size;
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add_memory_region(0, LOWMEMSIZE(), E820_RAM);
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add_memory_region(HIGH_MEMORY, mem_size - sgivwfb_mem_size - HIGH_MEMORY, E820_RAM);
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add_memory_region(sgivwfb_mem_phys, sgivwfb_mem_size, E820_RESERVED);
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return "PROM";
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/* Remove gcc warnings */
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(void) sanitize_e820_map(NULL, NULL);
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(void) copy_e820_map(NULL, 0);
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}
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