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31 lines
541 B
C
31 lines
541 B
C
#include <generated/csr.h>
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#include <irq.h>
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#include <uart.h>
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static void isr(void)
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{
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unsigned int irqs;
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irqs = irq_pending() & irq_getmask();
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if(irqs & (1 << UART_INTERRUPT))
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uart_isr();
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}
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#define EXTERNAL_IRQ 0x800
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#define SYSTEM_CALL 0xc00
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void exception_handler(unsigned long vect, unsigned long *sp);
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void exception_handler(unsigned long vect, unsigned long *sp)
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{
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vect &= 0xf00;
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if(vect == SYSTEM_CALL) {
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puts("scall");
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} else if(vect == EXTERNAL_IRQ) {
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isr();
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} else {
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/* Unhandled exception */
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for(;;);
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}
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}
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