pci_config.h

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#pragma once
 
#include <kernel/acpi/acpi.h>
 
#include <stdint.h>
 
typedef uint16_t pci_segment_group_t;
 
typedef uint8_t pci_bus_t;
 
typedef uint8_t pci_slot_t;
 
typedef uint8_t pci_function_t;
 
typedef struct PACKED
{
    uint64_t base;
    pci_segment_group_t segmentGroup;
    pci_bus_t startBus;
    pci_bus_t endBus;
    uint32_t reserved;
} pci_config_bar_t;
 
typedef struct PACKED
{
    sdt_header_t header;
    uint64_t reserved;
    pci_config_bar_t entries[];
} mcfg_t;
 
uint8_t pci_config_read8(pci_segment_group_t segmentGroup, pci_bus_t bus, pci_slot_t slot, pci_function_t function,
    uint16_t offset);
 
uint16_t pci_config_read16(pci_segment_group_t segmentGroup, pci_bus_t bus, pci_slot_t slot, pci_function_t function,
    uint16_t offset);
 
uint32_t pci_config_read32(pci_segment_group_t segmentGroup, pci_bus_t bus, pci_slot_t slot, pci_function_t function,
    uint16_t offset);
 
void pci_config_write8(pci_segment_group_t segmentGroup, pci_bus_t bus, pci_slot_t slot, pci_function_t function,
    uint16_t offset, uint8_t value);
 
void pci_config_write16(pci_segment_group_t segmentGroup, pci_bus_t bus, pci_slot_t slot, pci_function_t function,
    uint16_t offset, uint16_t value);
 
void pci_config_write32(pci_segment_group_t segmentGroup, pci_bus_t bus, pci_slot_t slot, pci_function_t function,
    uint16_t offset, uint32_t value);