void _init( void ) {
pcb_t *pcb;
context_t *context;
status_t stat;
/*
** BOILERPLATE CODE - taken from basic framework
**
** Initialize interrupt stuff.
*/
__init_interrupts(); // IDT and PIC initialization
/*
** Console I/O system.
*/
c_io_init();
c_setscroll( 0, 7, 99, 99 );
c_puts_at( 0, 6, "================================================================================" );
/*
** 20103-SPECIFIC CODE STARTS HERE
*/
/*
** Initialize various OS modules
*/
c_puts( "Starting module init: " );
_q_init(); // must be first
_pcb_init();
_stack_init();
_sio_init();
_syscall_init();
_sched_init();
_clock_init();
//_pci_init();
build_lapic_info();
_paging_init();
c_puts( "\n" );
c_puts(" Ending init\n");
initSMP();
/*
** Create the initial system ESP
**
** This will be the address of the next-to-last
** longword in the system stack.
*/
_system_esp = ((uint32_t *) ( (&_system_stack) + 1)) - 2;
/*
** Install the ISRs
*/
__install_isr( INT_VEC_TIMER, _isr_clock );
__install_isr( INT_VEC_SYSCALL, _isr_syscall );
__install_isr( INT_VEC_SERIAL_PORT_1, _isr_sio );
/*
** Create the initial process
**
** Code mostly stolen from _sys_fork() and _sys_exec();
** if either of those routines change, SO MUST THIS!!!
**
** First, get a PCB and a stack
*/
stat = _pcb_alloc( &pcb );
if( stat != E_SUCCESS ) {
_kpanic( "_init", "first pcb alloc status %s", stat );
}
stat = _stack_alloc( &(pcb->stack) );
if( stat != E_SUCCESS ) {
_kpanic( "_init", "first stack alloc status %s", stat );
}
/*
** Next, set up various PCB fields
*/
pcb->pid = PID_INIT;
pcb->ppid = PID_INIT;
pcb->prio = PRIO_MAXIMUM;
/*
** Set up the initial process context.
*/
context = _setup_stack( pcb->stack, (uint32_t) init );
// Finally, set up the process' ESP
context->esp = (uint32_t) context;
// Make it the "current" process
_current = pcb;
_current->context = context;
/*
** Starting up the idle routine is the responsibility
** of the initial user process.
*/
/*
** Turn on the SIO receiver (the transmitter will be turned
** on/off as characters are being sent)
*/
_sio_enable( SIO_RX );
/*
** END OF 20103-SPECIFIC CODE
**
** Finally, report that we're all done.
*/
c_puts( "System initialization complete.\n" );
}
void _init( void ) {
pcb_t *pcb;
/*
** BOILERPLATE CODE - taken from basic framework
**
** Initialize interrupt stuff.
*/
__init_interrupts(); // IDT and PIC initialization
// Ignore the 0x2A interrupt which happens when removing or inserting a
// flash drive.
__install_isr( 0x2A, _ignore_isr );
/*
** Console I/O system.
*/
c_io_init();
c_clearscreen();
#ifdef ISR_DEBUGGING_CODE
c_setscroll( 0, 7, 99, 99 );
c_puts_at( 0, 6, "================================================================================" );
#endif
/*
** 20123-SPECIFIC CODE STARTS HERE
*/
/*
** Initialize various OS modules
**
** Note: the clock, SIO, and syscall modules also install
** their ISRs.
*/
c_puts( "Module init: " );
_q_init(); // must be first
_pcb_init();
_stack_init();
_sio_init();
_sys_init();
_sched_init();
_clock_init();
_pci_init();
_disk_init();
_net_init();
c_puts( "\n" );
c_puts("Launching the shell. Please be patient\n");
__delay(1000);
c_clearscreen();
/*
** Create the initial system ESP
**
** This will be the address of the next-to-last
** longword in the system stack.
*/
_system_esp = ((uint32_t *) ( (&_system_stack) + 1)) - 2;
/*
** Create the initial process
**
** Code mostly stolen from _sys_fork(); if that routine
** changes, SO MUST THIS!!!
*/
// allocate a PCB and stack
pcb = _create_process( NULL );
if( pcb == NULL ) {
_kpanic( "_init", "init() creation failed", FAILURE );
}
// initialize the stack with the standard context
pcb->context = _create_stack( pcb->stack );
if( pcb->context == NULL ) {
_kpanic( "_init", "init() stack setup failed", FAILURE );
}
// define the entry point for init()
pcb->context->eip = (uint32_t) init;
// set up various PCB fields
pcb->pid = pcb->ppid = PID_INIT; // next PID is initially 1
pcb->prio = PRIO_HIGH;
pcb->children = 1000;
// remember this PCB for use in reparenting orphan processes
_init_pcb = pcb;
// make it the first process
_schedule( pcb );
_dispatch();
/*
** Turn on the SIO receiver (the transmitter will be turned
** on/off as characters are being sent)
*/
_sio_enable( SIO_RX );
/*
** END OF 20123-SPECIFIC CODE
**
** Finally, report that we're all done.
*/
c_puts( "System initialization complete.\n" );
}