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Added some test code to setup a timer

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This commit is contained in:
ngiddings
2021-04-15 07:23:19 -05:00
parent 3e73c7c0ac
commit 8e6589b472
1 changed files with 16 additions and 10 deletions
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26
src/x86/quark_x86.c
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@@ -9,6 +9,7 @@
#include "string.h"
#include "module.h"
#include "isr.h"
#include "config.h"
#include <stdint.h>
#include <stddef.h>
@@ -41,6 +42,7 @@ int startPaging(uint32_t *directory, uint32_t *table, uint32_t *identityTable)
int initialize(void *multiboot_info)
{
printf("***%s***\n", PACKAGE_STRING);
static struct interrupt_descriptor_t idt[256];
static struct page_stack_t page_stack;
static struct kernel_t kernel;
@@ -74,29 +76,33 @@ int initialize(void *multiboot_info)
{
load_module(&kernel, &boot_info.modules[i]);
}
// TODO: setup IDT
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);
// TODO: setup APIC
asm volatile(
"mov $0xFF, %%al;"
"outb %%al, $0xA1;"
"outb %%al, $0x21;"
::: "al"
);
apic_enable();
struct msr_apic_base_t msr;
read_msr(MSR_APIC_BASE, (uint64_t*)&msr);
msr.apic_base = (size_t) &_kernel_end >> 12;
write_msr(MSR_APIC_BASE, (uint64_t*)&msr);
printf("MSR_APIC_BASE: %016x\n", *((uint32_t*)&msr));
apic_registers = (struct apic_registers_t*) (msr.apic_base << 12);
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->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");
// TODO: enter first process
}