1 files changed, 102 insertions, 0 deletions
diff --git a/kernel/inc/drivers/pci.h b/kernel/inc/drivers/pci.h
new file mode 100644
index 0000000..9429f29
--- /dev/null
+++ b/kernel/inc/drivers/pci.h
@@ -0,0 +1,102 @@
+// MIT License, Copyright (c) 2020 Marvin Borner
+
+#ifndef PCI_H
+#define PCI_H
+
+#include <def.h>
+
+#define PCI_VENDOR_ID 0x00 // 2
+#define PCI_DEVICE_ID 0x02 // 2
+#define PCI_COMMAND 0x04 // 2
+#define PCI_STATUS 0x06 // 2
+#define PCI_REVISION_ID 0x08 // 1
+
+#define PCI_PROG_IF 0x09 // 1
+#define PCI_SUBCLASS 0x0a // 1
+#define PCI_CLASS 0x0b // 1
+#define PCI_CACHE_LINE_SIZE 0x0c // 1
+#define PCI_LATENCY_TIMER 0x0d // 1
+#define PCI_HEADER_TYPE 0x0e // 1
+#define PCI_BIST 0x0f // 1
+#define PCI_BAR0 0x10 // 4
+#define PCI_BAR1 0x14 // 4
+#define PCI_BAR2 0x18 // 4
+#define PCI_BAR3 0x1C // 4
+#define PCI_BAR4 0x20 // 4
+#define PCI_BAR5 0x24 // 4
+
+#define PCI_INTERRUPT_LINE 0x3C // 1
+
+#define PCI_SECONDARY_BUS 0x19 // 1
+
+#define PCI_HEADER_TYPE_DEVICE 0
+#define PCI_HEADER_TYPE_BRIDGE 1
+#define PCI_HEADER_TYPE_CARDBUS 2
+
+#define PCI_TYPE_BRIDGE 0x0604
+#define PCI_TYPE_SATA 0x0106
+
+#define PCI_ADDRESS_PORT 0xCF8
+#define PCI_VALUE_PORT 0xCFC
+
+#define PCI_NONE 0xFFFF
+
+typedef void (*pci_func_t)(u32 device, u16 vendor_id, u16 device_id, void *extra);
+
+struct pci_device_descriptor {
+	u32 port_base;
+	u32 interrupt;
+
+	u8 bus;
+	u8 slot;
+	u8 func;
+
+	u16 vendor_id;
+	u16 device_id;
+
+	u8 class_id;
+	u8 subclass_id;
+	u8 interface_id;
+
+	u8 revision;
+};
+
+static inline u8 pci_extract_bus(u32 device)
+{
+	return (u8)((device >> 16));
+}
+
+static inline u8 pci_extract_slot(u32 device)
+{
+	return (u8)((device >> 8));
+}
+
+static inline u8 pci_extract_func(u32 device)
+{
+	return (u8)(device);
+}
+
+static inline u32 pci_get_addr(u32 device, int field)
+{
+	return 0x80000000 | (u32)(pci_extract_bus(device) << 16) |
+	       (u32)(pci_extract_slot(device) << 11) | (u32)(pci_extract_func(device) << 8) |
+	       ((field)&0xFC);
+}
+
+static inline u32 pci_box_device(int bus, int slot, int func)
+{
+	return (u32)((bus << 16) | (slot << 8) | func);
+}
+
+u32 pci_read_field(u32 device, int field, int size);
+void pci_write_field(u32 device, int field, u32 value);
+u16 pci_find_type(u32 dev);
+void pci_scan_hit(pci_func_t f, u32 dev, void *extra) NONNULL;
+void pci_scan_func(pci_func_t f, int type, int bus, int slot, int func, void *extra) NONNULL;
+void pci_scan_slot(pci_func_t f, int type, int bus, int slot, void *extra) NONNULL;
+void pci_scan_bus(pci_func_t f, int type, int bus, void *extra) NONNULL;
+void pci_scan(pci_func_t f, int type, void *extra) NONNULL;
+int pci_get_interrupt(u32 device);
+void pci_install(void);
+
+#endif