christoph/interrupt-handling-using-the-x86-apic
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Christoph Urlacher
2023-02-26 21:12:51 +01:00
commit d2ec37332f
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13
code/ap_boot_copy.cpp Normal file
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// Allocate physical memory for copying the startup routine
auto &memoryService = System::getService<MemoryService>();
void *startupCodeMemory = memoryService.mapIO(0x8000, Util::PAGESIZE);
// Identity map the allocated physical memory to the kernel address space
memoryService.unmap(reinterpret_cast<uint32_t>(startupCodeMemory));
memoryService.mapPhysicalAddress(0x8000, 0x8000,
Kernel::Paging::PRESENT | Kernel::Paging::READ_WRITE);
// Copy the startup routine and prepared variables to the identity mapped page
auto startupCode = Util::Address<uint32_t>(reinterpret_cast<uint32_t>(&boot_ap));
auto destination = Util::Address<uint32_t>(0x8000);
destination.copyRange(startupCode, boot_ap_size);