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70 lines
1.4 KiB
C
70 lines
1.4 KiB
C
/* Copyright (C) 2021,2022 fef <owo@fef.moe>. All rights reserved. */
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#include <arch/irq.h>
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#include <gay/config.h>
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#include <gay/errno.h>
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#include <gay/irq.h>
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#include <gay/kprintf.h>
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void (*irq_table[NUM_IRQ])(void);
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#if CFG_DEBUG_IRQ
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/*
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* If CFG_DEBUG_IRQ is set, the IRQ entry points pass the IRQ number
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* as an argument to the IRQ handler (see arch/<arch>/sys/irq.S).
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*/
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static void do_unknown_irq(unsigned int number)
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{
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kprintf("Unknown IRQ %d encountered!\n", number);
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}
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# define UNKNOWN_IRQ_HANDLER ((void (*)(void))do_unknown_irq)
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#else
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static void do_unknown_irq(void)
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{
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kprintf("Unknown IRQ encountered!\n");
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}
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# define UNKNOWN_IRQ_HANDLER (do_unknown_irq)
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#endif
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void irq_init(void)
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{
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for (unsigned int i = 0; i < NUM_IRQ; i++)
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irq_table[i] = UNKNOWN_IRQ_HANDLER;
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arch_irq_init();
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}
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int irq_enable(unsigned int number)
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{
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if (number >= NUM_IRQ)
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return -ERANGE;
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if (irq_table[number] == UNKNOWN_IRQ_HANDLER)
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return -ENOENT;
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arch_irq_enable(number);
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return 0;
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}
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void irq_disable(unsigned int number)
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{
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if (number < NUM_IRQ)
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arch_irq_disable(number);
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}
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int irq_attach(unsigned int number, void (*handler)(void))
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{
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if (number >= NUM_IRQ)
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return -ERANGE;
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if (irq_table[number] != UNKNOWN_IRQ_HANDLER)
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return -EEXIST;
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irq_table[number] = handler;
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return 0;
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}
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void irq_detach(unsigned int number)
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{
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if (number < NUM_IRQ)
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irq_table[number] = UNKNOWN_IRQ_HANDLER;
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}
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