| 39,9 → 39,16 |
|---|
| #include <arch/cp0.h> |
| #include <time/clock.h> |
| #include <arch/drivers/arc.h> |
| |
| #include <ipc/sysipc.h> |
| #include <ddi/device.h> |
| #include <ddi/irq.h> |
| |
| #define IRQ_COUNT 8 |
| #define TIMER_IRQ 7 |
| |
| function timer_fnc = NULL; |
| static irq_t timer_irq; |
| |
| /** Disable interrupts. |
| * |
| * @return Old interrupt priority level. |
| 91,8 → 98,13 |
|---|
| cp0_compare_write(nextcount); |
| } |
| |
| static void timer_exception(int n, istate_t *istate) |
| static irq_ownership_t timer_claim(void) |
| { |
| return IRQ_ACCEPT; |
| } |
| |
| static void timer_irq_handler(irq_t *irq, void *arg, ...) |
| { |
| unsigned long drift; |
| |
| drift = cp0_count_read() - nextcount; |
| 103,43 → 115,26 |
|---|
| nextcount = cp0_count_read() + cp0_compare_value - drift; |
| cp0_compare_write(nextcount); |
| clock(); |
| |
| if (timer_fnc != NULL) |
| timer_fnc(); |
| } |
| |
| static void swint0(int n, istate_t *istate) |
| { |
| cp0_cause_write(cp0_cause_read() & ~(1 << 8)); /* clear SW0 interrupt */ |
| ipc_irq_send_notif(0); |
| } |
| |
| static void swint1(int n, istate_t *istate) |
| { |
| cp0_cause_write(cp0_cause_read() & ~(1 << 9)); /* clear SW1 interrupt */ |
| ipc_irq_send_notif(1); |
| } |
| |
| /* Initialize basic tables for exception dispatching */ |
| void interrupt_init(void) |
| { |
| int_register(TIMER_IRQ, "timer", timer_exception); |
| int_register(0, "swint0", swint0); |
| int_register(1, "swint1", swint1); |
| irq_init(IRQ_COUNT, IRQ_COUNT); |
| |
| irq_initialize(&timer_irq); |
| timer_irq.devno = device_assign_devno(); |
| timer_irq.inr = TIMER_IRQ; |
| timer_irq.claim = timer_claim; |
| timer_irq.handler = timer_irq_handler; |
| irq_register(&timer_irq); |
| |
| timer_start(); |
| cp0_unmask_int(TIMER_IRQ); |
| } |
| |
| static void ipc_int(int n, istate_t *istate) |
| { |
| ipc_irq_send_notif(n-INT_OFFSET); |
| } |
| |
| /* Reregister irq to be IPC-ready */ |
| void irq_ipc_bind_arch(unative_t irq) |
| { |
| /* Do not allow to redefine timer */ |
| /* Swint0, Swint1 are already handled */ |
| if (irq == TIMER_IRQ || irq < 2) |
| return; |
| int_register(irq, "ipc_int", ipc_int); |
| } |
| |
| /** @} |
| */ |