// This file is part of noxos and licensed under the MIT open source license

#ifndef NOXOS_PCI_H
#define NOXOS_PCI_H

#include "utils/stdtypes.h"
#include "utils/string.h"

typedef struct {
    uint16_t            vendor_id;
    uint16_t            device_id;
    uint16_t            command_reg;
    uint16_t            status_reg;
    uint8_t             revision_id;
    uint8_t             progif;        // Programming Interface Byte
    uint8_t             subclass;
    uint8_t             main_class;
    uint8_t             cache_line_size;
    uint8_t             latency_timer;
    uint8_t             header_type;
    uint8_t             bist;          // Built-in Self-Test
} __attribute__((packed)) pci_device_header_T;

typedef struct {
    pci_device_header_T header;
    uint32_t            bar0;
    uint32_t            bar1;
    uint32_t            bar2;
    uint32_t            bar3;
    uint32_t            bar4;
    uint32_t            bar5;
    uint32_t            cardbus_cis_pointer;
    uint16_t            subsystem_vendor_id;
    uint16_t            subsystem_id;
    uint32_t            expansion_rom_base_address;
    uint8_t             capabilities;
    uint8_t             reserved[7];
    uint8_t             interrupt_line;
    uint8_t             interrupt_pin;
    uint8_t             min_grant;
    uint8_t             max_latency;
} __attribute__((packed)) pci_header_0_T;

void        pci_init                ();
string_t    pci_get_vendor_string   (uint16_t vendor_id);
string_t    pci_get_device_string   (uint16_t device_id);

#endif // NOXOS_PCI_H