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Added sequence to remap PIC

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Wrote GDT code in C
Added routines to initialize GDT and IDT
This commit is contained in:
ngiddings
2021-04-16 01:45:40 -05:00
parent 8e6589b472
commit 6138766c49
7 changed files with 223 additions and 74 deletions
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30
src/x86/quark_x86.c
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@@ -17,7 +17,7 @@ extern int _kernel_end;
struct apic_registers_t volatile *apic_registers;
int startPaging(uint32_t *directory, uint32_t *table, uint32_t *identityTable)
int start_paging(uint32_t *directory, uint32_t *table, uint32_t *identityTable)
{
for (int i = 0; i < 1024; i++)
{
@@ -42,8 +42,9 @@ int startPaging(uint32_t *directory, uint32_t *table, uint32_t *identityTable)
int initialize(void *multiboot_info)
{
initialize_gdt();
initialize_idt();
printf("***%s***\n", PACKAGE_STRING);
static struct interrupt_descriptor_t idt[256];
static struct page_stack_t page_stack;
static struct kernel_t kernel;
struct memory_region_t map_array[16];
@@ -76,33 +77,18 @@ int initialize(void *multiboot_info)
{
load_module(&kernel, &boot_info.modules[i]);
}
memset(idt, 0, sizeof(struct interrupt_descriptor_t) * 256);
create_interrupt_descriptor(&idt[EXCEPTION_DIV_BY_0], (void*)isr_division_by_zero, INTERRPUT_INT32, 0);
create_interrupt_descriptor(&idt[EXCEPTION_GPF], (void*)isr_gp_fault, INTERRPUT_INT32, 0);
create_interrupt_descriptor(&idt[EXCEPTION_PAGE_FAULT], (void*)isr_page_fault, INTERRPUT_INT32, 0);
create_interrupt_descriptor(&idt[EXCEPTION_DOUBLE_FAULT], (void*)isr_double_fault, INTERRPUT_INT32, 0);
create_interrupt_descriptor(&idt[ISR_APIC_TIMER], (void*)isr_timer, INTERRPUT_INT32, 0);
create_interrupt_descriptor(&idt[ISR_AP_START], (void*)isr_ap_start, INTERRPUT_INT32, 0);
create_interrupt_descriptor(&idt[ISR_SYSCALL], (void*)isr_syscall, INTERRPUT_INT32, 0);
lidt(idt);
asm volatile(
"mov $0xFF, %%al;"
"outb %%al, $0xA1;"
"outb %%al, $0x21;"
::: "al"
);
apic_enable(page_stack);
printf("spurious_interrupt_vector: %08x\n", *((uint32_t*) &apic_registers->spurious_iv));
printf("lvt_timer_vector: %08x\n", *((uint32_t*) &apic_registers->lvt_timer));
apic_registers->divide_config.value = APIC_DIVIDE_128;
apic_registers->lvt_timer.vector = ISR_APIC_TIMER;
apic_registers->lvt_timer.timer_mode = APIC_TIMER_PERIODIC;
apic_registers->initial_count.value = 1024*1024*512;
apic_registers->initial_count.value = 1024*1024*1024;
apic_registers->lvt_timer.mask = 0;
printf("spurious_interrupt_vector: %08x\n", *((uint32_t*) &apic_registers->spurious_iv));
printf("lvt_timer_vector: %08x\n", *((uint32_t*) &apic_registers->lvt_timer));
asm("sti");
while(1) asm("hlt");
while(1)
{
asm("hlt");
}
// TODO: enter first process
}