From b7b304843f34b9f7d9c36d0603874f5050f5d83a Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Tue, 4 Jun 2024 22:18:32 -0400 Subject: kernel/amd64: Add I/O APIC driver Signed-off-by: Ian Moffett --- sys/include/arch/amd64/ioapic.h | 44 ++++++++++++++++++++++++++++++++++++++ sys/include/arch/amd64/ioapicvar.h | 28 ++++++++++++++++++++++++ 2 files changed, 72 insertions(+) create mode 100644 sys/include/arch/amd64/ioapic.h create mode 100644 sys/include/arch/amd64/ioapicvar.h (limited to 'sys/include/arch') diff --git a/sys/include/arch/amd64/ioapic.h b/sys/include/arch/amd64/ioapic.h new file mode 100644 index 0000000..4a0479f --- /dev/null +++ b/sys/include/arch/amd64/ioapic.h @@ -0,0 +1,44 @@ +/* + * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of Hyra nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _MACHINE_IOAPIC_H_ +#define _MACHINE_IOAPIC_H_ + +#include + +void ioapic_init(void *base); +void ioapic_gsi_mask(uint8_t gsi); + +void ioapic_gsi_unmask(uint8_t gsi); +void ioapic_irq_mask(uint8_t irq); + +void ioapic_irq_unmask(uint8_t irq); +void ioapic_set_vec(uint8_t irq, uint8_t vector); + +#endif /* !_MACHINE_IOAPIC_H_ */ diff --git a/sys/include/arch/amd64/ioapicvar.h b/sys/include/arch/amd64/ioapicvar.h new file mode 100644 index 0000000..d5a75df --- /dev/null +++ b/sys/include/arch/amd64/ioapicvar.h @@ -0,0 +1,28 @@ +#ifndef _MACHINE_IOAPICVAR_H_ +#define _MACHINE_IOAPICVAR_H_ + +#include + +/* Register offsets */ +#define IOREGSEL 0x00 +#define IOWIN 0x10 +#define IOAPICVER 0x01 +#define IOREDTBL 0x10 + +union ioapic_redentry { + struct { + uint8_t vector; + uint8_t delmod : 3; + uint8_t destmod : 1; + uint8_t delivs : 1; + uint8_t intpol : 1; + uint8_t remote_irr : 1; + uint8_t trigger_mode : 1; + uint8_t interrupt_mask : 1; + uint64_t reserved : 39; + uint8_t dest_field; + }; + uint64_t value; +}; + +#endif /* !_MACHINE_IOAPICVAR_H_ */ -- cgit v1.2.3