f28fd84c68
- add ioapic support - currently, all irq will forwarded to the boot processor git-svn-id: http://svn.lfbs.rwth-aachen.de/svn/scc/trunk/MetalSVM@293 315a16e6-25f9-4109-90ae-ca3045a26c18
137 lines
3.2 KiB
C
137 lines
3.2 KiB
C
/*
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* Copyright 2010 Stefan Lankes, Chair for Operating Systems,
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* RWTH Aachen University
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* This file is part of MetalSVM.
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*/
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#ifndef __ARCH_APIC_H__
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#define __ARCH_APIC_H__
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#include <metalsvm/stddef.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* MP Floating Pointer Structure */
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typedef struct {
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uint32_t signature;
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uint32_t mp_config;
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uint8_t length;
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uint8_t version;
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uint8_t checksum;
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uint8_t features[5];
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} __attribute__ ((packed)) apic_mp_t;
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/* MP Configuration Table */
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typedef struct {
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uint32_t signature;
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uint16_t length;
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uint8_t revision;
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uint8_t checksum;
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uint8_t oem_id[8];
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uint8_t product_id[12];
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uint32_t oem_table;
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uint16_t oem_table_size;
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uint16_t entry_count;
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uint32_t lapic;
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uint16_t extended_table_length;
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uint8_t extended_table_checksum;
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} __attribute__ ((packed)) apic_config_table_t;
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/* APIC Processor Entry */
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typedef struct {
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uint8_t type;
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uint8_t id;
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uint8_t version;
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uint8_t cpu_flags;
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uint32_t cpu_signature;
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uint32_t cpu_feature;
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} __attribute__ ((packed)) apic_processor_entry_t;
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/* IO APIC Entry */
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typedef struct {
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uint8_t type;
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uint8_t id;
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uint8_t version;
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uint8_t enabled;
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uint32_t addr;
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} __attribute__ ((packed)) apic_io_entry_t;
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/* Bus Entry */
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typedef struct {
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uint8_t type;
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uint8_t bus_id;
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char name[6];
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} __attribute__ ((packed)) apic_bus_entry_t;
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/* I/O Interrupt Assignment Entry */
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typedef struct {
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uint8_t type; // type = 3
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uint8_t itype; // interrupt type
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uint16_t flags; // flags , PO and EL
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uint8_t src_bus; // source bus id
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uint8_t src_irq; // source interrupt (from the old bus)
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uint8_t dest_apic; // who it gets sent to 0xFF == all
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uint8_t dest_intin; // which pin it gets sent to on the IO APIC
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} __attribute__ ((packed)) apic_ioirq_entry_t;
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typedef struct {
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union {
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struct {
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uint32_t vector : 8,
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delivery_mode : 3, /* 000: FIXED
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* 001: lowest prio
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* 111: ExtINT
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*/
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dest_mode : 1, /* 0: physical, 1: logical */
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delivery_status : 1,
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polarity : 1,
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irr : 1,
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trigger : 1, /* 0: edge, 1: level */
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mask : 1, /* 0: enabled, 1: disabled */
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__reserved_2 : 15;
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} bitfield;
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uint32_t whole;
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} lower;
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union {
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struct {
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uint32_t __reserved_1 : 24,
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physical_dest : 4,
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__reserved_2 : 4;
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} physical;
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struct {
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uint32_t __reserved_1 : 24,
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logical_dest : 8;
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} logical;
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uint32_t upper;
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} dest;
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} __attribute__ ((packed)) ioapic_route_t;
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int apic_init(void);
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void apic_eoi(void);
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uint32_t apic_cpu_id(void);
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int apic_calibration(void);
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int has_apic(void);
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int apic_is_enabled(void);
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int ioapic_inton(uint8_t irq, uint8_t apicid);
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int ioapic_intoff(uint8_t irq, uint8_t apicid);
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#ifdef __cplusplus
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}
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#endif
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#endif
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