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Kernel: Unify IDT and GDT code between x86_64 and x86_32

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The code is pretty much the same, so there are just couple macros
differiating initialization.
This commit is contained in:
Bananymous
2024-03-26 13:59:09 +02:00
parent af050cc729
commit 1943c3e7a1
12 changed files with 335 additions and 147 deletions
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13
kernel/kernel/Processor.cpp
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@@ -38,7 +38,7 @@ namespace Kernel
processor.m_stack = kmalloc(s_stack_size, 4096, true);
ASSERT(processor.m_stack);
processor.m_gdt = GDT::create();
processor.m_gdt = GDT::create(&processor);
ASSERT(processor.m_gdt);
processor.m_idt = IDT::create();
@@ -52,14 +52,19 @@ namespace Kernel
auto id = read_processor_id();
auto& processor = s_processors[id];
ASSERT(processor.m_gdt);
processor.m_gdt->load();
// initialize GS
#if ARCH(x86_64)
// set gs base to pointer to this processor
uint64_t ptr = reinterpret_cast<uint64_t>(&processor);
uint32_t ptr_hi = ptr >> 32;
uint32_t ptr_lo = ptr & 0xFFFFFFFF;
asm volatile("wrmsr" :: "d"(ptr_hi), "a"(ptr_lo), "c"(MSR_IA32_GS_BASE));
ASSERT(processor.m_gdt);
processor.gdt().load();
#elif ARCH(i686)
asm volatile("movw $0x28, %%ax; movw %%ax, %%gs" ::: "ax");
#endif
ASSERT(processor.m_idt);
processor.idt().load();