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55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
#pragma once
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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// common
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#define PCI_VENDOR_W 0x00
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#define PCI_DEVICE_W 0x02
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#define PCI_COMMAND_W 0x04
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#define PCI_STATUS_W 0x06
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#define PCI_REVISION_B 0x08
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#define PCI_PROG_IF_B 0x09
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#define PCI_SUBCLASS_B 0x0A
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#define PCI_CLASS_B 0x0B
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#define PCI_CACHE_SIZE_B 0x0C
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#define PCI_LATENCY_TIMER_B 0x0D
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#define PCI_HEADER_TYPE_B 0x0E
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#define PCI_BIST_B 0x0F
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// header type 0
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#define PCI_BAR0_D 0x10
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#define PCI_BAR1_D 0x14
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#define PCI_BAR2_D 0x18
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#define PCI_BAR3_D 0x1C
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#define PCI_BAR4_D 0x20
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#define PCI_BAR5_D 0x24
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#define PCI_CARDBUS_CIS_D 0x28
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#define PCI_SUBSYSTEM_VENDOR_W 0x2C
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#define PCI_SUBSYSTEM_W 0x2E
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#define PCI_EXPANSION_ROM_D 0x30
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#define PCI_CAP_PTR_B 0x34
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#define PCI_INT_LINE_B 0x3C
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#define PCI_INT_PIN_B 0x3D
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#define PCI_MIN_GRANT_B 0x3E
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#define PCI_MAX_LATENCY_B 0x3F
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struct pci_device {
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uint8_t bus: 8;
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uint8_t device: 5;
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uint8_t function: 3;
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};
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void pci_init(void);
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bool pci_findby_class(struct pci_device *dest, uint8_t class, uint8_t subclass, size_t *offset);
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bool pci_findby_id(struct pci_device *dest, uint16_t device, uint16_t vendor, size_t *offset);
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uint32_t pci_rcfg_d(struct pci_device dev, uint8_t offset);
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uint16_t pci_rcfg_w(struct pci_device dev, uint8_t offset);
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uint8_t pci_rcfg_b(struct pci_device dev, uint8_t offset);
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void pci_wcfg_d(struct pci_device dev, uint8_t offset, uint32_t dword);
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void pci_wcfg_w(struct pci_device dev, uint8_t offset, uint16_t word);
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void pci_wcfg_b(struct pci_device dev, uint8_t offset, uint8_t byte);
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