23 lines
610 B
C
23 lines
610 B
C
#include "mem.h"
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#include "vga.h"
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struct mem_desc *page_desc = (struct mem_desc *)&__ld_kernel_end;
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int memInit(unsigned long upper_mem)
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{
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printf("Free Mem going from %d to %d\n", &__ld_kernel_end, upper_mem *1024);
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unsigned long memdesc_end =
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(unsigned long)page_desc +
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((upper_mem) / (PAGE_SIZE / 1024)) * sizeof(struct mem_desc);
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uint lastUsed = (memdesc_end >> PAGE_SHIFT) + 1;
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for (uint i = 0; i < (upper_mem / (PAGE_SIZE / 1024)); i++) {
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struct mem_desc *mem = &page_desc[i];
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if (i < lastUsed)
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mem->ref = 1;
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else
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mem->ref = 0;
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mem->phy_addr = i * PAGE_SIZE;
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}
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return 0;
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}
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