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42 lines
843 B
C++
42 lines
843 B
C++
#include "textoutput.hpp"
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#include <cstdint>
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extern TextOutput& term;
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std::uint32_t multiboot_magic;
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std::uint32_t *multiboot_ptr;
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std::uint32_t lowerMem = 0;
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std::uint32_t upperMem = 0;
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bool multiboot_initialize()
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{
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if (multiboot_magic != 0x36d76289) {
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term.write("Not multiboot!");
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return false;
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}
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term.write("Found multiboot headers: ");
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auto ptr = multiboot_ptr + 2;
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while (ptr[0] != 0 && ptr[1] != 8) {
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term.write(ptr[0]);
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term.write(", ");
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if (ptr[0] == 4) {
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lowerMem = ptr[2] * 1024;
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upperMem = ptr[3] * 1024;
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}
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auto next = reinterpret_cast<std::uintptr_t>(ptr);
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next += ptr[1];
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next = (next + 7) & ~7;
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ptr = reinterpret_cast<std::uint32_t *>(next);
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}
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term.write('\n');
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return true;
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}
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