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

271 lines
7.5 KiB
C++

#include <BAN/Errors.h>
#include <kernel/IDT.h>
#include <kernel/InterruptController.h>
#include <kernel/Memory/kmalloc.h>
#include <kernel/Panic.h>
#include <kernel/Scheduler.h>
#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" \
"CR0=0x{8H}, CR2=0x{8H}, CR3=0x{8H}, CR4=0x{8H}\r\n", \
eax, ebx, ecx, edx, esp, ebp, cr0, cr2, cr3, cr4); \
}
#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); \
}
#define REGISTER_HANDLER(i) register_interrupt_handler(i, interrupt ## i)
namespace IDT
{
struct GateDescriptor
{
uint16_t offset1;
uint16_t selector;
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[16])() { nullptr };
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()
{
uint8_t irq;
for (uint32_t i = 0; i < 16; i++)
{
if (InterruptController::get().is_in_service(i))
{
irq = i;
goto found;
}
}
dprintln("Spurious irq");
return;
found:
if (s_irq_handlers[irq])
s_irq_handlers[irq]();
else
dprintln("no handler for irq 0x{2H}\n", irq);
// NOTE: Scheduler sends PIT eoi's
if (irq != PIT_IRQ)
InterruptController::get().eoi(irq);
Kernel::Scheduler::get().reschedule_if_idling();
}
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;"
);
extern "C" void syscall_asm();
asm(
".global syscall_asm;"
"syscall_asm:"
"pusha;"
"pushw %ds;"
"pushw %es;"
"pushw %ss;"
"pushw %ss;"
"popw %ds;"
"popw %es;"
"pushl %edx;"
"pushl %ecx;"
"pushl %ebx;"
"pushl %eax;"
"call cpp_syscall_handler;"
"addl $16, %esp;"
"popw %es;"
"popw %ds;"
// NOTE: following instructions are same as in 'popa', except we skip eax
// since it holds the return value of the syscall.
"popl %edi;"
"popl %esi;"
"popl %ebp;"
"addl $4, %esp;"
"popl %ebx;"
"popl %edx;"
"popl %ecx;"
"addl $4, %esp;"
"iret;"
);
static void flush_idt()
{
asm volatile("lidt %0"::"m"(s_idtr));
}
static void register_interrupt_handler(uint8_t index, void(*f)())
{
GateDescriptor& descriptor = s_idt[index];
descriptor.offset1 = (uint32_t)f & 0xFFFF;
descriptor.selector = 0x08;
descriptor.type = 0xE;
descriptor.DPL = 0;
descriptor.present = 1;
descriptor.offset2 = (uint32_t)f >> 16;
}
void register_irq_handler(uint8_t irq, void(*f)())
{
s_irq_handlers[irq] = f;
register_interrupt_handler(IRQ_VECTOR_BASE + irq, handle_irq_common);
flush_idt();
}
void register_syscall_handler(uint8_t offset, void(*handler)())
{
register_interrupt_handler(offset, handler);
s_idt[offset].DPL = 3;
}
void initialize()
{
constexpr size_t idt_size = 0x100 * sizeof(GateDescriptor);
s_idt = (GateDescriptor*)kmalloc(idt_size);
ASSERT(s_idt);
memset(s_idt, 0x00, idt_size);
s_idtr.offset = s_idt;
s_idtr.size = idt_size - 1;
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);
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);
register_syscall_handler(0x80, syscall_asm);
flush_idt();
}
}