72 lines
1.6 KiB
C
72 lines
1.6 KiB
C
// SPDX-License-Identifier: ISC
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#include <zinnia/assert.h>
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#include <zinnia/irq.h>
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#include <zinnia/list.h>
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#include <zinnia/percpu.h>
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#include <zinnia/print.h>
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#include <arch/irq.h>
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[[__percpu]]
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struct irq_percpu irq_data;
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bool irq_set_state(bool state) {
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return arch_irq_set_state(state);
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}
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bool irq_get_state() {
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return arch_irq_get_state();
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}
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void irq_wait() {
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arch_irq_wait();
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}
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void irq_lock() {
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bool prev = arch_irq_set_state(false);
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struct irq_percpu* state = percpu_ref(irq_data);
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if (state->depth++ == 0)
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state->saved_state = prev;
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}
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void irq_unlock() {
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struct irq_percpu* state = percpu_ref(irq_data);
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if (--state->depth == 0 && state->saved_state)
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arch_irq_set_state(true);
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}
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void irq_line_program(struct irq_line* line, enum irq_trigger_mode trigger, enum irq_polarity polarity) {
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irq_lock();
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line->mode = line->set_config(line, trigger, polarity);
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irq_unlock();
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}
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void irq_line_raise(struct irq_line* line) {
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assert(!arch_irq_get_state(), "Raised an IRQ line with interrupts enabled");
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irq_lock();
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line->is_busy = true;
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bool claimed = false;
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struct irq_handler* handler;
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list_foreach(handler, &line->handlers, next) {
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if (handler->raise(handler) == IRQ_STATUS_HANDLED)
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claimed = true;
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}
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if (!claimed)
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log("irq: Spurious interrupt\n");
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if ((line->mode & IRQ_MODE_EOI) && line->eoi)
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line->eoi(line);
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line->is_busy = false;
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irq_unlock();
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}
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void irq_line_attach(struct irq_line* line, struct irq_handler* handler) {
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irq_lock();
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list_insert_head(&line->handlers, handler, next);
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irq_unlock();
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}
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