1 files changed, 44 insertions, 0 deletions
diff --git a/include/pci.h b/include/pci.h
new file mode 100644
index 0000000..e6b445c
--- /dev/null
+++ b/include/pci.h
@@ -0,0 +1,44 @@
+#ifndef _PCI_H
+#define _PCI_H
+
+#include "ioport.h"
+
+static inline void pci_config_writel(uint16_t bdf, uint32_t addr, uint32_t val)
+{
+	outl(0xcf8, 0x80000000 | (bdf << 8) | (addr & 0xfc));
+	outl(0xcfc, val);
+}
+
+void pci_config_writew(uint16_t bdf, uint32_t addr, uint16_t val)
+{
+	outl(0xcf8, 0x80000000 | (bdf << 8) | (addr & 0xfc));
+	outw(0xcfc | (addr & 2), val);
+}
+
+void pci_config_writeb(uint16_t bdf, uint32_t addr, uint8_t val)
+{
+	outl(0xcf8, 0x80000000 | (bdf << 8) | (addr & 0xfc));
+	outb(0xcfc | (addr & 3), val);
+}
+
+uint32_t pci_config_readl(uint16_t bdf, uint32_t addr)
+{
+	outl(0xcf8, 0x80000000 | (bdf << 8) | (addr & 0xfc));
+	return inl(0xcfc);
+}
+
+uint16_t pci_config_readw(uint16_t bdf, uint32_t addr)
+{
+	outl(0xcf8, 0x80000000 | (bdf << 8) | (addr & 0xfc));
+	return inw(0xcfc | (addr & 2));
+}
+
+uint8_t pci_config_readb(uint16_t bdf, uint32_t addr)
+{
+	outl(0xcf8, 0x80000000 | (bdf << 8) | (addr & 0xfc));
+	return inb(0xcfc | (addr & 3));
+}
+
+#define PCI_VENDOR_ID 0
+
+#endif