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Only one AP can start at a time

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This commit is contained in:
Jeremy Soller 2016-09-01 17:08:43 -06:00
parent c74abfc8a7
commit f14569e313
4 changed files with 23 additions and 12 deletions
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6
arch/x86_64/src/start.rs
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@ -27,6 +27,7 @@ static mut TBSS_TEST_ZERO: usize = 0;
static mut TDATA_TEST_NONZERO: usize = 0xFFFFFFFFFFFFFFFF;
static AP_COUNT: AtomicUsize = ATOMIC_USIZE_INIT;
pub static AP_READY: AtomicBool = ATOMIC_BOOL_INIT;
static BSP_READY: AtomicBool = ATOMIC_BOOL_INIT;
static HEAP_FRAME: AtomicUsize = ATOMIC_USIZE_INIT;
@ -94,6 +95,7 @@ pub unsafe extern fn kstart() -> ! {
// Reset AP variables
AP_COUNT.store(0, Ordering::SeqCst);
AP_READY.store(false, Ordering::SeqCst);
BSP_READY.store(false, Ordering::SeqCst);
HEAP_FRAME.store(0, Ordering::SeqCst);
@ -127,7 +129,7 @@ pub unsafe extern fn kstart() -> ! {
device::init(&mut active_table);
// Read ACPI tables, starts APs
// acpi::init(&mut active_table);
acpi::init(&mut active_table);
BSP_READY.store(true, Ordering::SeqCst);
}
@ -187,6 +189,8 @@ pub unsafe extern fn kstart_ap(stack_start: usize, stack_end: usize) -> ! {
// Init devices for AP
device::init_ap(&mut active_table);
AP_READY.store(true, Ordering::SeqCst);
}
let ap_number = AP_COUNT.fetch_add(1, Ordering::SeqCst);