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#include "interrupts.h"
#include "kernel.h"
#include "log.h"
#include "e1000.h"
#include "asm_int.h"
#include "asm_pit.h"
#include "driver/mouse.h"
#include "driver/keyboard.h"
#include "scheduler.h"
#include "asm_x86.h"
#include "smp.h"
#include "apic.h"
#include "ringbuffer.h"
#include "compositor.h"
/** The size of our interrupts table */
#define INT_MAX 256 // 0-255
/** Addresses of the registered interrupt handlers */
static uint32_t handlers[INT_MAX];
/** The interrupt descriptor table */
struct int_desc
{
uint16_t addrLo;
uint16_t sel;
uint8_t zeros;
uint8_t flags;
uint16_t addrHi;
} idt[INT_MAX];
/** The interrupt descriptor table descriptor */
struct idt_desc
{
uint16_t size;
uint16_t baseLo;
uint16_t baseHi;
} idtd;
/** Sets a handler for a specific interrupt */
static void int_install_ir(int irq, uint16_t flags, uint16_t sel, void *addr)
{
uint64_t base=(uint32_t)&(*(uint32_t*)addr);
idt[irq].addrLo = base & 0xffff;
idt[irq].addrHi = (base >> 16) & 0xffff;
idt[irq].zeros=0;
idt[irq].flags=flags;
idt[irq].sel=sel;
}
/** register an interrupt handler for given irq number */
void interrupt_register(uint32_t irq, uint32_t func_addr)
{
if(irq<128||irq>160)kpanic("irq number out of range!");
if(handlers[irq]!=0)kpanic("handler already registered!");
handlers[irq]=func_addr;
}
/*
* Interrupt dispatcher
* Remeber that we are inside an interrupt here!
*/
uint32_t interrupt_handler(uint32_t esp, uint32_t irq)
{
uint32_t cpu=smp_get(SMP_APIC_ID);
if(handlers[irq]!=0)
{
uint32_t (*f)(uint32_t esp)=handlers[irq];
esp=f(esp);
scheduler_wake_worker(esp);
apic_eoi();
esp=scheduler_run(esp,-1);
return esp;
}
if(irq==INTERRUPT_APIC_TIMER)
{
if(cpu==0)
{
compositor_wake2();
scheduler_wake_worker(esp);
}
}
if(irq==INTERRUPT_APIC_TIMER || irq==INTERRUPT_IPI)
{
esp=scheduler_run(esp,-1);
apic_eoi();
return esp;
}
if(irq==INTERRUPT_SYSCALL) // do not EOI
{
uint32_t *stack;
stack=esp;
task_syscall(stack[11],stack[8],stack[10],stack[9]); //eax,ebx,ecx,edx
scheduler_wake_worker(esp);
esp=scheduler_run(esp,-1);
return esp;
}
kpanic("unhandled interrupt %d",irq);
/*
if(handlers[irq]!=0)
{
//uint32_t (*f)(uint32_t esp)=handlers[irq];
//esp=f(esp);
apic_eoi();
}
else if(irq!=INTERRUPT_SYSCALL&&irq!=INTERRUPT_IPI&&irq!=INTERRUPT_APIC_TIMER)
{
kpanic("unhandled interrupt %d",irq);
}
// process IRQ
switch(irq)
{
case INTERRUPT_SYSCALL:
stack=esp;
// task_syscall(stack[11],stack[8],stack[10],stack[9]); //eax,ebx,ecx,edx
break;
case INTERRUPT_APIC_TIMER: // frequency is configured in smp.c (100hz)
esp=scheduler_run(esp,-1);
apic_eoi();
break;
case INTERRUPT_IPI: // inter process interrupt
esp=scheduler_run(esp,-1);
apic_eoi();
break;
case 255: // default or spurious
kpanic("Spurious/Unknown Interrupt!?");
break;
}
// reschedule to kernel worker on these
if(irq==INTERRUPT_SYSCALL||irq==INTERRUPT_KEYBOARD||irq==INTERRUPT_MOUSE)
{
// scheduler_wake_worker(esp);
esp=scheduler_run(esp,-1);
}
// Ack all to LAPIC, except software syscalls
return esp;
*/
}
/**
* init interrupt descriptor table (TODO; do we seriously have to hardcode this?)
*/
void interrupts_init()
{
klog("Initializing. IDT: 0x%08x, IDTD: 0x%08X",&idt,&idtd);
// Default interrupt handling
for(int i=0; i<INT_MAX; i++)
{
int_install_ir(i, 0b10001110, 0x08,&int255);
}
// Exceptions
int_install_ir(0, 0b10001110, 0x08,&exc0);
int_install_ir(1, 0b10001110, 0x08,&exc1);
int_install_ir(2, 0b10001110, 0x08,&exc2);
int_install_ir(3, 0b10001110, 0x08,&exc3);
int_install_ir(4, 0b10001110, 0x08,&exc4);
int_install_ir(5, 0b10001110, 0x08,&exc5);
int_install_ir(6, 0b10001110, 0x08,&exc6);
int_install_ir(7, 0b10001110, 0x08,&exc7);
int_install_ir(8, 0b10001110, 0x08,&exc8);
int_install_ir(9, 0b10001110, 0x08,&exc9);
int_install_ir(10, 0b10001110, 0x08,&exc10);
int_install_ir(11, 0b10001110, 0x08,&exc11);
int_install_ir(12, 0b10001110, 0x08,&exc12);
int_install_ir(13, 0b10001110, 0x08,&exc13);
int_install_ir(14, 0b10001110, 0x08,&exc14);
int_install_ir(15, 0b10001110, 0x08,&exc15);
int_install_ir(16, 0b10001110, 0x08,&exc16);
int_install_ir(17, 0b10001110, 0x08,&exc17);
int_install_ir(18, 0b10001110, 0x08,&exc18);
int_install_ir(19, 0b10001110, 0x08,&exc19);
int_install_ir(20, 0b10001110, 0x08,&exc20);
int_install_ir(21, 0b10001110, 0x08,&exc21);
int_install_ir(22, 0b10001110, 0x08,&exc22);
int_install_ir(23, 0b10001110, 0x08,&exc23);
int_install_ir(24, 0b10001110, 0x08,&exc24);
int_install_ir(25, 0b10001110, 0x08,&exc25);
int_install_ir(26, 0b10001110, 0x08,&exc26);
int_install_ir(27, 0b10001110, 0x08,&exc27);
int_install_ir(28, 0b10001110, 0x08,&exc28);
int_install_ir(29, 0b10001110, 0x08,&exc29);
int_install_ir(30, 0b10001110, 0x08,&exc30);
int_install_ir(31, 0b10001110, 0x08,&exc31);
// System Calls (User Software / Ring 3)
int_install_ir(128, 0b11101110, 0x08,&int128);
// Ring 1 only
int_install_ir(129, 0b10001110, 0x08,&int129);
int_install_ir(130, 0b10001110, 0x08,&int130);
int_install_ir(131, 0b10001110, 0x08,&int131);
int_install_ir(132, 0b10001110, 0x08,&int132);
int_install_ir(133, 0b10001110, 0x08,&int133);
int_install_ir(134, 0b10001110, 0x08,&int134);
int_install_ir(135, 0b10001110, 0x08,&int135);
int_install_ir(136, 0b10001110, 0x08,&int136);
int_install_ir(137, 0b10001110, 0x08,&int137);
int_install_ir(138, 0b10001110, 0x08,&int138);
int_install_ir(139, 0b10001110, 0x08,&int139);
int_install_ir(140, 0b10001110, 0x08,&int140);
int_install_ir(141, 0b10001110, 0x08,&int141);
int_install_ir(142, 0b10001110, 0x08,&int142);
int_install_ir(143, 0b10001110, 0x08,&int143);
int_install_ir(144, 0b10001110, 0x08,&int144);
int_install_ir(145, 0b10001110, 0x08,&int145);
int_install_ir(146, 0b10001110, 0x08,&int146);
int_install_ir(147, 0b10001110, 0x08,&int147);
int_install_ir(148, 0b10001110, 0x08,&int148);
int_install_ir(149, 0b10001110, 0x08,&int149);
int_install_ir(150, 0b10001110, 0x08,&int150);
int_install_ir(151, 0b10001110, 0x08,&int151);
int_install_ir(152, 0b10001110, 0x08,&int152);
int_install_ir(153, 0b10001110, 0x08,&int153);
int_install_ir(154, 0b10001110, 0x08,&int154);
int_install_ir(155, 0b10001110, 0x08,&int155);
int_install_ir(156, 0b10001110, 0x08,&int156);
int_install_ir(157, 0b10001110, 0x08,&int157);
int_install_ir(158, 0b10001110, 0x08,&int158);
int_install_ir(159, 0b10001110, 0x08,&int159);
int_install_ir(160, 0b10001110, 0x08,&int160);
}
/** Installs the interrupt table */
void interrupts_install()
{
idtd.size=sizeof(struct int_desc)*INT_MAX;
uint32_t addr=(uint32_t)&idt[0];
idtd.baseHi=addr>>16;
idtd.baseLo=0xffff&addr;
__asm__("lidt %0"::"m" (idtd));
}
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