//----------------------------------------------------------------------------------------------------//
// @func - hw_init
//! @desc
//! PPC405 hardware specific initialization
//! - Initialize PPC exception handling mechanism
//! - If an interrupt controller is present, register interrupt controller handler
//! as the external interrupt handler.
//! - Register PPC timer interrupt handler as the handler for the PPC PIT interrupt
//! @param
//! - none
//! @return
//! - nothing
//! @note
//! - none
//----------------------------------------------------------------------------------------------------//
void hw_init(void)
{
Xil_ExceptionInit(); // Initialize exception handling
Xil_ExceptionDisable();
#ifdef CONFIG_INTC
int_system_init();
#endif
Xil_ExceptionRegisterHandler(PIT_INT, (Xil_ExceptionHandler)timer_int_handler, (void *)0); // Register PIT interrupt handler
pit_initialize (SYSTMR_INTERVAL); // use SYSTMR_INTERVAL as configured in MSS
}
int i386_pc_timer_initialize(void)
{
int err;
pit_initialize();
err = interrupt_register(PIC_IRQ_PIT, INTERRUPT_CALLBACK, timer_handler);
if (err < 0) {
console_message(T_ERR, "Unable to register timer handler");
return err;
}
return 0;
}
/* Initialize HAL */
int _cdecl HAL_Initialize()
{
GDT_Initialize();
IDT_Initialize(0x08);
InitializePIC();
/* In InitializePIC I remap PIT to IRQ 0x20 */
pit_initialize(0x20, 0x08);
pit_start_counter0(1000, PIT_CONTROLWORD_OPERATINGMODE_RATEGEN_MASK);
EnableInterrupts();
return 0;
}
void kernel_init(multiboot_info_t* mb_info, unsigned int magic) {
terminal_initialize();
terminal_writestring("Project Omamori now starting...\n");
gdt_init();
idt_init();
initialize_vmem_allocator();
k_heap_init();
initialize_pageframes(mb_info);
// do global constructor setup
kprintf("Calling global constructors.\n");
size_t *current = (size_t*)((size_t)&__CTOR_LIST__+4); // skip the first function pointer
int n_constructors_called = 1;
while(true) {
if(*current == 0)
break;
//kprintf("Calling constructor %u at address 0x%x.\n", (unsigned long long int)n_constructors_called, ((unsigned long long int)*current) );
void(*func)(void) = (void(*)(void))(*current);
func();
current++;
n_constructors_called++;
}
kprintf("Called %u global constructors.\n", (unsigned long long int)n_constructors_called);
//system_halt;
kprintf("Kernel begins at physical address 0x%x, corresponding to pageframe ID %u.\n", (unsigned long long int)(&kernel_start_phys), (unsigned long long int)(pageframe_get_block_from_addr( (size_t)&kernel_start_phys )) );
kprintf("Kernel ends at physical address 0x%x, corresponding to pageframe ID %u.\n", (unsigned long long int)(&kernel_end_phys), (unsigned long long int)(pageframe_get_block_from_addr( (size_t)&kernel_end_phys )) );
terminal_writestring("\nInitializing PICs.\n");
pic_initialize(PIC_IRQ_OFFSET_1, PIC_IRQ_OFFSET_2);
set_all_irq_status(true);
terminal_writestring("Initializing PIT.\n");
pit_initialize(PIT_DEFAULT_FREQ_DIVISOR);
//system_halt
}
