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98 lines
2.3 KiB
C
98 lines
2.3 KiB
C
/*
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* This file is part of libn3ds
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* Copyright (C) 2024 derrek, profi200
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "types.h"
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#include "arm9/drivers/irq9.h"
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#include "arm9/drivers/interrupt.h"
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IrqIsr g_irqIsrTable[32] = {0};
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void IRQ_init(void)
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{
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// Disable and acknowledge all IRQs at once.
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getIrq9Regs()->ie_if = UINT64_C(0xFFFFFFFF)<<32;
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}
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void IRQ_registerIsr(const Interrupt id, const IrqIsr isr)
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{
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// Get the IRQ register pointer.
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Irq9 *const irq = getIrq9Regs();
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// Save state and disable all IRQs on this CPU.
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const u32 savedState = enterCriticalSection();
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// Set ISR function pointer.
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g_irqIsrTable[id] = isr;
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// Enable the IRQ.
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irq->ie |= BIT(id);
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// Restore state.
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leaveCriticalSection(savedState);
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}
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void IRQ_enable(const Interrupt id)
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{
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// Get the IRQ register pointer.
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Irq9 *const irq = getIrq9Regs();
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// Save state and disable all IRQs on this CPU.
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const u32 savedState = enterCriticalSection();
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// Enable the IRQ.
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irq->ie |= BIT(id);
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// Restore state.
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leaveCriticalSection(savedState);
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}
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void IRQ_disable(const Interrupt id)
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{
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// Get the IRQ register pointer.
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Irq9 *const irq = getIrq9Regs();
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// Save state and disable all IRQs on this CPU.
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const u32 savedState = enterCriticalSection();
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// Disable the IRQ.
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irq->ie &= ~BIT(id);
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// Restore state.
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leaveCriticalSection(savedState);
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}
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void IRQ_unregisterIsr(const Interrupt id)
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{
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// Get the IRQ register pointer.
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Irq9 *const irq = getIrq9Regs();
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// Save state and disable all IRQs on this CPU.
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const u32 savedState = enterCriticalSection();
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// Disable the IRQ.
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irq->ie &= ~BIT(id);
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// Invalidate the ISR function pointer.
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g_irqIsrTable[id] = (IrqIsr)NULL;
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// Restore state.
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leaveCriticalSection(savedState);
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} |