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#include <arch/exception.h>
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#include <arch/exception.h>
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#include <arch/debug_print/print.h>
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#include <arch/debug_print/print.h>
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#include <arch/memstr.h>
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#include <arch/memstr.h>
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#include <arch/regutils.h>
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#include <arch/regutils.h>
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#include <interrupt.h>
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#include <interrupt.h>
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#include <arch/drivers/gxemul.h>
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#include <arch/machine.h>
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#include <arch/mm/page_fault.h>
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#include <arch/mm/page_fault.h>
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#include <print.h>
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#include <print.h>
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#include <syscall/syscall.h>
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#include <syscall/syscall.h>
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#define PREFETCH_OFFSET     0x8
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#define PREFETCH_OFFSET      0x8
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#define BRANCH_OPCODE       0xea000000
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#define BRANCH_OPCODE        0xea000000
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#define LDR_OPCODE      0xe59ff000
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#define LDR_OPCODE           0xe59ff000
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#define VALID_BRANCH_MASK   0xff000000
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#define VALID_BRANCH_MASK    0xff000000
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#define EXC_VECTORS_SIZE    0x20
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#define EXC_VECTORS_SIZE     0x20
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#define EXC_VECTORS     0x8
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#define EXC_VECTORS          0x8
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extern uintptr_t supervisor_sp;
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extern uintptr_t supervisor_sp;
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extern uintptr_t exc_stack;
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extern uintptr_t exc_stack;
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inline static void setup_stack_and_save_regs()
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inline static void setup_stack_and_save_regs()
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 *
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 *
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 * Determines the sources of interrupt, and calls their handlers.
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 * Determines the sources of interrupt, and calls their handlers.
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 */
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 */
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static void irq_exception(int exc_no, istate_t *istate)
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static void irq_exception(int exc_no, istate_t *istate)
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{
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{
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// TODO: move somewhere to gxemul.c and use machine_irq_exception (or some similar
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// name) to avoid using MACHINE == MACHINE_GXEMUL_TESTARM
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#if MACHINE == MACHINE_GXEMUL_TESTARM
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    uint32_t sources = gxemul_irqc_get_sources();
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    int i = 0;
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    for (; i < GXEMUL_IRQC_MAX_IRQ; i++) {
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        if (sources & (1 << i)) {
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            irq_t *irq = irq_dispatch_and_lock(i);
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            if (irq) {
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                /* The IRQ handler was found. */
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                irq->handler(irq, irq->arg);
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                spinlock_unlock(&irq->lock);
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            } else {
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                /* Spurious interrupt.*/
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                dprintf("cpu%d: spurious interrupt (inum=%d)\n", CPU->id, i);
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            }
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        }
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    }
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#endif
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/* TODO remove after testing the above code
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            noirq = 0;
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            if (i == CONSOLE_IRQ) {
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                char readchar = *(char*)0x10000000;
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                if (readchar == 0) {
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                    aux_puts("?");
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                }
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                else {
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                    dprintf("%c", readchar);
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                }
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            }
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            else if (i == TIMER_IRQ) {
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                dprintf("\n.\n");
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                //acknowledge
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                *(uint32_t*)0x15000110 = 0;
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            }
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        }
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    }
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    if (noirq)
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    aux_puts("IRQ exception without source\n");*/
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    machine_irq_exception(exc_no, istate);
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}
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}
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/** Fills exception vectors with appropriate exception handlers.
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/** Fills exception vectors with appropriate exception handlers.
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*/
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*/
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void install_exception_handlers(void)
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void install_exception_handlers(void)