1 files changed, 55 insertions, 0 deletions
diff --git a/src/include/ipxe/ecam.h b/src/include/ipxe/ecam.h
new file mode 100644
index 000000000..0f0fbf4bf
--- /dev/null
+++ b/src/include/ipxe/ecam.h
@@ -0,0 +1,55 @@
+#ifndef _IPXE_ECAM_H
+#define _IPXE_ECAM_H
+
+/** @file
+ *
+ * PCI I/O API for Enhanced Configuration Access Mechanism (ECAM)
+ *
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
+
+#include <ipxe/acpi.h>
+#include <ipxe/pci.h>
+
+/** Enhanced Configuration Access Mechanism per-device size */
+#define ECAM_SIZE 4096
+
+/** Enhanced Configuration Access Mechanism table signature */
+#define ECAM_SIGNATURE ACPI_SIGNATURE ( 'M', 'C', 'F', 'G' )
+
+/** An Enhanced Configuration Access Mechanism allocation */
+struct ecam_allocation {
+	/** Base address */
+	uint64_t base;
+	/** PCI segment number */
+	uint16_t segment;
+	/** Start PCI bus number */
+	uint8_t start;
+	/** End PCI bus number */
+	uint8_t end;
+	/** Reserved */
+	uint8_t reserved[4];
+} __attribute__ (( packed ));
+
+/** An Enhanced Configuration Access Mechanism table */
+struct ecam_table {
+	/** ACPI header */
+	struct acpi_header acpi;
+	/** Reserved */
+	uint8_t reserved[8];
+	/** Allocation structures */
+	struct ecam_allocation alloc[0];
+} __attribute__ (( packed ));
+
+/** A mapped Enhanced Configuration Access Mechanism allocation */
+struct ecam_mapping {
+	/** Allocation */
+	struct ecam_allocation alloc;
+	/** PCI bus:dev.fn address range */
+	struct pci_range range;
+	/** MMIO base address */
+	void *regs;
+};
+
+#endif /* _IPXE_ECAM_H */