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Matheus
65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
#ifndef _PCI_H
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#define _PCI_H
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// 2 byte fields
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#define PCI_CONFIG_VENDOR 0x0
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#define PCI_CONFIG_DEVICEID 0x2
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#define PCI_CONFIG_STATUS 0x6
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#define PCI_STATUS_HASCAP 0x10
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// 1 byte fields
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#define PCI_CONFIG_REVISION 0x8
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#define PCI_CONFIG_PROGIF 0x9
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#define PCI_CONFIG_SUBCLASS 0xa
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#define PCI_CONFIG_CLASS 0xb
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#define PCI_CONFIG_HEADERTYPE 0xe
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#define PCI_HEADERTYPE_MULTIFUNCTION_MASK 0x80
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#define PCI_HEADERTYPE_MASK 0x7f
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#define PCI_HEADERTYPE_STANDARD 0
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#define PCI_CONFIG_CAP 0x34
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#define PCI_CAP_MSI 0x5
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#define PCI_CAP_MSIX 0x11
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typedef struct {
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bool exists;
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int offset;
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} pcicap_t;
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typedef struct pcienum_t {
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struct pcienum_t *next;
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int bus;
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int device;
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int function;
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int type;
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int class;
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int subclass;
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int progif;
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int vendor;
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int deviceid;
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int revision;
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pcicap_t msi;
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pcicap_t msix;
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} pcienum_t;
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typedef struct {
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uintptr_t address;
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size_t length;
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bool mmio;
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} pcibar_t;
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uint8_t pci_read8(int bus, int device, int function, uint32_t offset);
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uint16_t pci_read16(int bus, int device, int function, uint32_t offset);
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uint32_t pci_read32(int bus, int device, int function, uint32_t offset);
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void pci_write8(int bus, int device, int function, uint32_t offset, uint8_t v);
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void pci_write16(int bus, int device, int function, uint32_t offset, uint16_t v);
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void pci_write32(int bus, int device, int function, uint32_t offset, uint32_t value);
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pcienum_t *pci_getenum(int class, int subclass, int progif, int vendor, int deviceid, int revision, int n);
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int pci_getcapoffset(pcienum_t *e, int cap, int n);
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pcibar_t pci_getbar(pcienum_t *e, int bar);
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void pci_init();
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#endif
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