forked from Bananymous/banan-os
239 lines
6.4 KiB
C++
239 lines
6.4 KiB
C++
#include <kernel/APIC.h>
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#include <kernel/IDT.h>
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#include <kernel/panic.h>
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#include <kernel/kprint.h>
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#include <kernel/Serial.h>
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union GateDescriptor
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{
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struct
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{
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uint16_t offset_lo;
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uint16_t selector;
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uint8_t reserved;
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uint8_t type : 4;
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uint8_t zero : 1;
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uint8_t dpl : 2;
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uint8_t present : 1;
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uint16_t offset_hi;
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};
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struct
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{
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uint32_t low;
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uint32_t high;
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};
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} __attribute__((packed));
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struct IDTR
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{
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uint16_t size;
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void* offset;
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} __attribute((packed));
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static IDTR s_idtr;
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static GateDescriptor s_idt[0x100];
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static void (*s_irq_handlers[0xFF])() { nullptr };
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#define INTERRUPT_HANDLER____(i, msg) \
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static void interrupt ## i () \
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{ \
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uint32_t eax, ebx, ecx, edx; \
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uint32_t esp, ebp; \
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uint32_t cr0, cr2, cr3, cr4; \
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asm volatile("":"=a"(eax),"=b"(ebx),"=c"(ecx),"=d"(edx)); \
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asm volatile("movl %%esp, %%eax":"=a"(esp)); \
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asm volatile("movl %%ebp, %%eax":"=a"(esp)); \
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asm volatile("movl %%cr0, %%eax":"=a"(cr0)); \
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asm volatile("movl %%cr2, %%eax":"=a"(cr2)); \
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asm volatile("movl %%cr3, %%eax":"=a"(cr3)); \
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asm volatile("movl %%cr4, %%eax":"=a"(cr4)); \
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kprintln("\n\e[31mRegister dump (hex)"); \
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kprintln("eax={8H}, ebx={8H}, ecx={8H}, edx={8H}", eax, ebx, ecx, edx); \
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kprintln("esp={8H}, ebp={8H}", esp, ebp); \
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kprintln("CR0={8H} CR2={8H} CR3={8H} CR4={8H}", cr0, cr2, cr3, cr4); \
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Kernel::panic(msg); \
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}
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#define INTERRUPT_HANDLER_ERR(i, msg) \
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static void interrupt ## i () \
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{ \
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uint32_t eax, ebx, ecx, edx; \
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uint32_t esp, ebp; \
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uint32_t cr0, cr2, cr3, cr4; \
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uint32_t error_code; \
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asm volatile("":"=a"(eax),"=b"(ebx),"=c"(ecx),"=d"(edx)); \
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asm volatile("movl %%esp, %%eax":"=a"(esp)); \
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asm volatile("movl %%ebp, %%eax":"=a"(esp)); \
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asm volatile("movl %%cr0, %%eax":"=a"(cr0)); \
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asm volatile("movl %%cr2, %%eax":"=a"(cr2)); \
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asm volatile("movl %%cr3, %%eax":"=a"(cr3)); \
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asm volatile("movl %%cr4, %%eax":"=a"(cr4)); \
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asm volatile("popl %%eax":"=a"(error_code)); \
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kprintln("\n\e[31mRegister dump (hex)"); \
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kprintln("eax={8H}, ebx={8H}, ecx={8H}, edx={8H}", eax, ebx, ecx, edx); \
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kprintln("esp={8H}, ebp={8H}", esp, ebp); \
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kprintln("CR0={8H} CR2={8H} CR3={8H} CR4={8H}", cr0, cr2, cr3, cr4); \
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Kernel::panic(msg " (error: {})", error_code); \
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}
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INTERRUPT_HANDLER____(0x00, "Division Error")
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INTERRUPT_HANDLER____(0x01, "Debug")
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INTERRUPT_HANDLER____(0x02, "Non-maskable Interrupt")
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INTERRUPT_HANDLER____(0x03, "Breakpoint")
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INTERRUPT_HANDLER____(0x04, "Overflow")
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INTERRUPT_HANDLER____(0x05, "Bound Range Exception")
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INTERRUPT_HANDLER____(0x06, "Invalid Opcode")
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INTERRUPT_HANDLER____(0x07, "Device Not Available")
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INTERRUPT_HANDLER_ERR(0x08, "Double Fault")
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INTERRUPT_HANDLER____(0x09, "Coprocessor Segment Overrun")
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INTERRUPT_HANDLER_ERR(0x0A, "Invalid TSS")
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INTERRUPT_HANDLER_ERR(0x0B, "Segment Not Present")
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INTERRUPT_HANDLER_ERR(0x0C, "Stack-Segment Fault")
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INTERRUPT_HANDLER_ERR(0x0D, "General Protection Fault")
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INTERRUPT_HANDLER_ERR(0x0E, "Page Fault")
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INTERRUPT_HANDLER____(0x0F, "Unknown Exception 0x0F")
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INTERRUPT_HANDLER____(0x10, "x87 Floating-Point Exception")
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INTERRUPT_HANDLER_ERR(0x11, "Alignment Check")
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INTERRUPT_HANDLER____(0x12, "Machine Check")
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INTERRUPT_HANDLER____(0x13, "SIMD Floating-Point Exception")
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INTERRUPT_HANDLER____(0x14, "Virtualization Exception")
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INTERRUPT_HANDLER_ERR(0x15, "Control Protection Exception")
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INTERRUPT_HANDLER____(0x16, "Unknown Exception 0x16")
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INTERRUPT_HANDLER____(0x17, "Unknown Exception 0x17")
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INTERRUPT_HANDLER____(0x18, "Unknown Exception 0x18")
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INTERRUPT_HANDLER____(0x19, "Unknown Exception 0x19")
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INTERRUPT_HANDLER____(0x1A, "Unknown Exception 0x1A")
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INTERRUPT_HANDLER____(0x1B, "Unknown Exception 0x1B")
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INTERRUPT_HANDLER____(0x1C, "Hypervisor Injection Exception")
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INTERRUPT_HANDLER_ERR(0x1D, "VMM Communication Exception")
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INTERRUPT_HANDLER_ERR(0x1E, "Security Exception")
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INTERRUPT_HANDLER____(0x1F, "Unkown Exception 0x1F")
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#define REGISTER_HANDLER(i) register_interrupt_handler(i, interrupt ## i)
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extern "C" void handle_irq()
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{
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uint32_t isr[8];
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APIC::GetISR(isr);
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uint8_t irq = 0;
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for (uint8_t i = 0; i < 8; i++)
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{
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for (uint8_t j = 0; j < 32; j++)
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{
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if (isr[i] & ((uint32_t)1 << j))
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{
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irq = 32 * i + j;
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goto found;
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}
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}
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}
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found:
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if (irq == 0)
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{
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dprintln("Spurious irq");
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return;
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}
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if (s_irq_handlers[irq])
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s_irq_handlers[irq]();
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else
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Kernel::panic("no handler for irq 0x{2H}\n", irq);
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APIC::EOI(irq);
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}
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extern "C" void handle_irq_common();
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asm(
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".globl handle_irq_common;"
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"handle_irq_common:"
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"pusha;"
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"pushw %ds;"
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"pushw %es;"
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"pushw %ss;"
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"pushw %ss;"
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"popw %ds;"
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"popw %es;"
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"call handle_irq;"
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"popw %es;"
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"popw %ds;"
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"popa;"
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"iret;"
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);
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namespace IDT
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{
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static void flush_idt()
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{
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asm volatile("lidt %0"::"m"(s_idtr));
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}
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static void unimplemented_trap()
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{
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Kernel::panic("Unhandeled IRQ");
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}
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static void register_interrupt_handler(uint8_t index, void (*f)())
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{
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s_idt[index].low = 0x00080000 | ((uint32_t)(f) & 0x0000ffff);
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s_idt[index].high = ((uint32_t)(f) & 0xffff0000) | 0x8e00;
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flush_idt();
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}
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void register_irq_handler(uint8_t irq, void (*f)())
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{
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s_irq_handlers[IRQ_VECTOR_BASE + irq] = f;
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register_interrupt_handler(IRQ_VECTOR_BASE + irq, handle_irq_common);
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}
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void initialize()
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{
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s_idtr.offset = s_idt;
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s_idtr.size = sizeof(s_idt);
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for (uint8_t i = 0xFF; i > IRQ_VECTOR_BASE; i--)
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register_irq_handler(i, nullptr);
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REGISTER_HANDLER(0x00);
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REGISTER_HANDLER(0x01);
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REGISTER_HANDLER(0x02);
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REGISTER_HANDLER(0x03);
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REGISTER_HANDLER(0x04);
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REGISTER_HANDLER(0x05);
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REGISTER_HANDLER(0x06);
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REGISTER_HANDLER(0x07);
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REGISTER_HANDLER(0x08);
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REGISTER_HANDLER(0x09);
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REGISTER_HANDLER(0x0A);
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REGISTER_HANDLER(0x0B);
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REGISTER_HANDLER(0x0C);
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REGISTER_HANDLER(0x0D);
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REGISTER_HANDLER(0x0E);
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REGISTER_HANDLER(0x0F);
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REGISTER_HANDLER(0x10);
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REGISTER_HANDLER(0x11);
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REGISTER_HANDLER(0x12);
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REGISTER_HANDLER(0x13);
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REGISTER_HANDLER(0x14);
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REGISTER_HANDLER(0x15);
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REGISTER_HANDLER(0x16);
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REGISTER_HANDLER(0x17);
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REGISTER_HANDLER(0x18);
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REGISTER_HANDLER(0x19);
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REGISTER_HANDLER(0x1A);
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REGISTER_HANDLER(0x1B);
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REGISTER_HANDLER(0x1C);
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REGISTER_HANDLER(0x1D);
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REGISTER_HANDLER(0x1E);
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REGISTER_HANDLER(0x1F);
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flush_idt();
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}
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} |