banan-os/kernel/arch/i386/IDT.cpp

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#include <BAN/Errors.h>
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#include <kernel/IDT.h>
#include <kernel/InterruptController.h>
#include <kernel/kmalloc.h>
#include <kernel/Panic.h>
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#define INTERRUPT_HANDLER____(i, msg) \
static void interrupt ## i () \
{ \
uint32_t eax, ebx, ecx, edx; \
uint32_t esp, ebp; \
uint32_t cr0, cr2, cr3, cr4; \
asm volatile("":"=a"(eax),"=b"(ebx),"=c"(ecx),"=d"(edx)); \
asm volatile("movl %%esp, %%eax":"=a"(esp)); \
asm volatile("movl %%ebp, %%eax":"=a"(ebp)); \
asm volatile("movl %%cr0, %%eax":"=a"(cr0)); \
asm volatile("movl %%cr2, %%eax":"=a"(cr2)); \
asm volatile("movl %%cr3, %%eax":"=a"(cr3)); \
asm volatile("movl %%cr4, %%eax":"=a"(cr4)); \
Kernel::Panic(msg "\r\nRegister dump\r\n" \
"eax=0x{8H}, ebx=0x{8H}, ecx=0x{8H}, edx=0x{8H}\r\n" \
"esp=0x{8H}, ebp=0x{8H}\r\n" \
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"CR0=0x{8H}, CR2=0x{8H}, CR3=0x{8H}, CR4=0x{8H}\r\n", \
eax, ebx, ecx, edx, esp, ebp, cr0, cr2, cr3, cr4); \
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}
#define INTERRUPT_HANDLER_ERR(i, msg) \
static void interrupt ## i () \
{ \
uint32_t eax, ebx, ecx, edx; \
uint32_t esp, ebp; \
uint32_t cr0, cr2, cr3, cr4; \
uint32_t error_code; \
asm volatile("":"=a"(eax),"=b"(ebx),"=c"(ecx),"=d"(edx)); \
asm volatile("movl %%esp, %%eax":"=a"(esp)); \
asm volatile("movl %%ebp, %%eax":"=a"(ebp)); \
asm volatile("movl %%cr0, %%eax":"=a"(cr0)); \
asm volatile("movl %%cr2, %%eax":"=a"(cr2)); \
asm volatile("movl %%cr3, %%eax":"=a"(cr3)); \
asm volatile("movl %%cr4, %%eax":"=a"(cr4)); \
asm volatile("popl %%eax":"=a"(error_code)); \
Kernel::Panic(msg " (error code: 0x{8H})\r\n" \
"Register dump\r\n" \
"eax=0x{8H}, ebx=0x{8H}, ecx=0x{8H}, edx=0x{8H}\r\n" \
"esp=0x{8H}, ebp=0x{8H}\r\n" \
"CR0=0x{8H}, CR2=0x{8H}, CR3=0x{8H}, CR4=0x{8H}\r\n", \
eax, ebx, ecx, edx, esp, ebp, cr0, cr2, cr3, cr4, error_code); \
}
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#define REGISTER_HANDLER(i) register_interrupt_handler(i, interrupt ## i)
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namespace IDT
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{
struct GateDescriptor
{
uint16_t offset1;
uint16_t selector;
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uint8_t reserved : 5;
uint8_t zero1 : 3;
uint8_t type : 4;
uint8_t zero2 : 1;
uint8_t DPL : 2;
uint8_t present : 1;
uint16_t offset2;
} __attribute__((packed));
struct IDTR
{
uint16_t size;
void* offset;
} __attribute((packed));
static IDTR s_idtr;
static GateDescriptor* s_idt = nullptr;
static void(**s_irq_handlers)();
INTERRUPT_HANDLER____(0x00, "Division Error")
INTERRUPT_HANDLER____(0x01, "Debug")
INTERRUPT_HANDLER____(0x02, "Non-maskable Interrupt")
INTERRUPT_HANDLER____(0x03, "Breakpoint")
INTERRUPT_HANDLER____(0x04, "Overflow")
INTERRUPT_HANDLER____(0x05, "Bound Range Exception")
INTERRUPT_HANDLER____(0x06, "Invalid Opcode")
INTERRUPT_HANDLER____(0x07, "Device Not Available")
INTERRUPT_HANDLER_ERR(0x08, "Double Fault")
INTERRUPT_HANDLER____(0x09, "Coprocessor Segment Overrun")
INTERRUPT_HANDLER_ERR(0x0A, "Invalid TSS")
INTERRUPT_HANDLER_ERR(0x0B, "Segment Not Present")
INTERRUPT_HANDLER_ERR(0x0C, "Stack-Segment Fault")
INTERRUPT_HANDLER_ERR(0x0D, "General Protection Fault")
INTERRUPT_HANDLER_ERR(0x0E, "Page Fault")
INTERRUPT_HANDLER____(0x0F, "Unknown Exception 0x0F")
INTERRUPT_HANDLER____(0x10, "x87 Floating-Point Exception")
INTERRUPT_HANDLER_ERR(0x11, "Alignment Check")
INTERRUPT_HANDLER____(0x12, "Machine Check")
INTERRUPT_HANDLER____(0x13, "SIMD Floating-Point Exception")
INTERRUPT_HANDLER____(0x14, "Virtualization Exception")
INTERRUPT_HANDLER_ERR(0x15, "Control Protection Exception")
INTERRUPT_HANDLER____(0x16, "Unknown Exception 0x16")
INTERRUPT_HANDLER____(0x17, "Unknown Exception 0x17")
INTERRUPT_HANDLER____(0x18, "Unknown Exception 0x18")
INTERRUPT_HANDLER____(0x19, "Unknown Exception 0x19")
INTERRUPT_HANDLER____(0x1A, "Unknown Exception 0x1A")
INTERRUPT_HANDLER____(0x1B, "Unknown Exception 0x1B")
INTERRUPT_HANDLER____(0x1C, "Hypervisor Injection Exception")
INTERRUPT_HANDLER_ERR(0x1D, "VMM Communication Exception")
INTERRUPT_HANDLER_ERR(0x1E, "Security Exception")
INTERRUPT_HANDLER____(0x1F, "Unkown Exception 0x1F")
extern "C" void handle_irq()
{
uint32_t isr[8];
InterruptController::Get().GetISR(isr);
uint8_t irq = 0;
for (uint8_t i = 0; i < 8; i++)
{
for (uint8_t j = 0; j < 32; j++)
{
if (isr[i] & ((uint32_t)1 << j))
{
irq = 32 * i + j;
goto found;
}
}
}
found:
if (irq == 0)
{
dprintln("Spurious irq");
return;
}
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if (s_irq_handlers[irq])
s_irq_handlers[irq]();
else
{
uint32_t isr_byte = irq / 32;
uint32_t isr_bit = irq % 32;
uint32_t isr[8];
InterruptController::Get().GetISR(isr);
if (!(isr[isr_byte] & (1 << isr_bit)))
{
dprintln("spurious irq 0x{2H}", irq);
return;
}
dprintln("no handler for irq 0x{2H}\n", irq);
}
InterruptController::Get().EOI(irq);
}
extern "C" void handle_irq_common();
asm(
".globl handle_irq_common;"
"handle_irq_common:"
"pusha;"
"pushw %ds;"
"pushw %es;"
"pushw %ss;"
"pushw %ss;"
"popw %ds;"
"popw %es;"
"call handle_irq;"
"popw %es;"
"popw %ds;"
"popa;"
"iret;"
);
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static void flush_idt()
{
asm volatile("lidt %0"::"m"(s_idtr));
}
static void register_interrupt_handler(uint8_t index, void(*f)())
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{
GateDescriptor& descriptor = s_idt[index];
descriptor.offset1 = (uint32_t)f & 0xFFFF;
descriptor.selector = 0x08;
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descriptor.type = 0xE;
descriptor.DPL = 0;
descriptor.present = 1;
descriptor.offset2 = (uint32_t)f >> 16;
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}
void register_irq_handler(uint8_t irq, void(*f)())
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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);
flush_idt();
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}
void initialize()
{
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constexpr size_t idt_size = 0x100 * sizeof(GateDescriptor);
s_idt = (GateDescriptor*)kmalloc_eternal(idt_size);
memset(s_idt, 0x00, idt_size);
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s_irq_handlers = (void(**)())kmalloc_eternal(0x100 * sizeof(void(*)()));
memset(s_irq_handlers, 0x00, 0x100 * sizeof(void(*)()));
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s_idtr.offset = s_idt;
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s_idtr.size = idt_size - 1;
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for (uint8_t i = 0x00; i <= 0xFF - IRQ_VECTOR_BASE; i++)
register_irq_handler(i, nullptr);
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REGISTER_HANDLER(0x00);
REGISTER_HANDLER(0x01);
REGISTER_HANDLER(0x02);
REGISTER_HANDLER(0x03);
REGISTER_HANDLER(0x04);
REGISTER_HANDLER(0x05);
REGISTER_HANDLER(0x06);
REGISTER_HANDLER(0x07);
REGISTER_HANDLER(0x08);
REGISTER_HANDLER(0x09);
REGISTER_HANDLER(0x0A);
REGISTER_HANDLER(0x0B);
REGISTER_HANDLER(0x0C);
REGISTER_HANDLER(0x0D);
REGISTER_HANDLER(0x0E);
REGISTER_HANDLER(0x0F);
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REGISTER_HANDLER(0x10);
REGISTER_HANDLER(0x11);
REGISTER_HANDLER(0x12);
REGISTER_HANDLER(0x13);
REGISTER_HANDLER(0x14);
REGISTER_HANDLER(0x15);
REGISTER_HANDLER(0x16);
REGISTER_HANDLER(0x17);
REGISTER_HANDLER(0x18);
REGISTER_HANDLER(0x19);
REGISTER_HANDLER(0x1A);
REGISTER_HANDLER(0x1B);
REGISTER_HANDLER(0x1C);
REGISTER_HANDLER(0x1D);
REGISTER_HANDLER(0x1E);
REGISTER_HANDLER(0x1F);
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flush_idt();
}
}