diff options
Diffstat (limited to 'interrupts.c')
| -rw-r--r-- | interrupts.c | 38 |
1 files changed, 36 insertions, 2 deletions
diff --git a/interrupts.c b/interrupts.c index f4192a0..2dd7fbd 100644 --- a/interrupts.c +++ b/interrupts.c @@ -1,7 +1,11 @@ +#include "uart.h" +#include "interrupts.h" #include "io.h" #include "svc_interface.h" #include "armclock.h" - +/** + @brief The undefined instruction interrupt handler + */ void __attribute__((noreturn)) setup(void); // from what I've heard, reset is never used on the Pi; @@ -25,7 +29,7 @@ uint32_t supervisor_call_handler(enum svc_type request, uint32_t arg1, uint32_t arg2, uint32_t arg3) { (void) arg2; (void) arg3; // unused for now - + switch(request) { case UART_PUTCHAR: putchar(arg1); @@ -59,6 +63,9 @@ void generic_handler(void) void irq_handler(void) { + uart_puts("nwm\r\n"); + + system_reentry_point(); if (armclk_irq_pending()) { puts("<<irq from timer>>"); @@ -78,3 +85,30 @@ void fiq_handler(void) while(1); } + +/* Here is your interrupt function */ +void +__attribute__((interrupt("IRQ"))) +__attribute__((section(".interrupt_vectors.text"))) +irq_handler(void) { + /* You code goes here */ + uart_puts("GOT INTERRUPT!\r\n"); + + local_timer_clr_reload_reg_t temp = { .IntClear = 1, .Reload = 1 }; + QA7->TimerClearReload = temp; // Clear interrupt & reload +} + +/* here is your main */ +int enable_timer(void) { + + QA7->TimerRouting.Routing = LOCALTIMER_TO_CORE0_IRQ; // Route local timer IRQ to Core0 + QA7->TimerControlStatus.ReloadValue = 100; // Timer period set + QA7->TimerControlStatus.TimerEnable = 1; // Timer enabled + QA7->TimerControlStatus.IntEnable = 1; // Timer IRQ enabled + QA7->TimerClearReload.IntClear = 1; // Clear interrupt + QA7->TimerClearReload.Reload = 1; // Reload now + QA7->Core0TimerIntControl.nCNTPNSIRQ_IRQ = 1; // We are in NS EL1 so enable IRQ to core0 that level + QA7->Core0TimerIntControl.nCNTPNSIRQ_FIQ = 0; // Make sure FIQ is zero + uart_puts("Enabled Timer\r\n"); + return(0); +}
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