1 files changed, 91 insertions, 0 deletions
diff --git a/src/include/ipxe/spcr.h b/src/include/ipxe/spcr.h
new file mode 100644
index 000000000..366092ade
--- /dev/null
+++ b/src/include/ipxe/spcr.h
@@ -0,0 +1,91 @@
+#ifndef _IPXE_SPCR_H
+#define _IPXE_SPCR_H
+
+/** @file
+ *
+ * ACPI Serial Port Console Redirection (SPCR)
+ *
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
+
+#include <stdint.h>
+#include <ipxe/acpi.h>
+
+/** Serial Port Console Redirection table signature */
+#define SPCR_SIGNATURE ACPI_SIGNATURE ( 'S', 'P', 'C', 'R' )
+
+/** A Serial Port Console Redirection table */
+struct spcr_table {
+	/** ACPI header */
+	struct acpi_header acpi;
+	/** Interface type */
+	uint8_t type;
+	/** Reserved */
+	uint8_t reserved_a[3];
+	/** Base address */
+	struct acpi_address base;
+	/** Reserved */
+	uint8_t reserved_b[6];
+	/** Baud rate
+	 *
+	 *  0: leave unchanged
+	 *  1:   2400 = 115200 / 48   (not defined in standard)
+	 *  2:   4800 = 115200 / 24   (not defined in standard)
+	 *  3:   9600 = 115200 / 12
+	 *  4:  19200 = 115200 / 6
+	 *  5:  38400 = 115200 / 3    (not defined in standard)
+	 *  6:  57600 = 115200 / 2
+	 *  7: 115200 = 115200 / 1
+	 */
+	uint8_t baud;
+	/** Parity */
+	uint8_t parity;
+	/** Stop bits */
+	uint8_t stop;
+	/** Flow control */
+	uint8_t flow;
+	/** Terminal type */
+	uint8_t terminal;
+	/** Language */
+	uint8_t lang;
+	/** PCI device ID */
+	uint16_t pci_device_id;
+	/** PCI vendor ID */
+	uint16_t pci_vendor_id;
+	/** PCI bus number */
+	uint8_t pci_bus;
+	/** PCI device number */
+	uint8_t pci_dev;
+	/** PCI function number */
+	uint8_t pci_func;
+	/** Reserved */
+	uint8_t reserved_c[4];
+	/** PCI segment */
+	uint8_t pci_segment;
+	/** Clock frequency */
+	uint32_t clock;
+	/** Precise baud rate */
+	uint32_t precise;
+	/** Reserved */
+	uint8_t reserved_d[4];
+} __attribute__ (( packed ));
+
+/* SPCR interface types */
+#define SPCR_TYPE_16550		0x0000		/**< 16550-compatible */
+#define SPCR_TYPE_16450		0x0001		/**< 16450-compatible */
+#define SPCR_TYPE_16550_GAS	0x0012		/**< 16550-compatible */
+
+/** SPCR baud rates */
+enum spcr_baud {
+	SPCR_BAUD_2400 = 1,
+	SPCR_BAUD_4800 = 2,
+	SPCR_BAUD_9600 = 3,
+	SPCR_BAUD_19200 = 4,
+	SPCR_BAUD_38400 = 5,
+	SPCR_BAUD_57600 = 6,
+	SPCR_BAUD_115200 = 7,
+	SPCR_BAUD_MAX
+};
+
+#endif /* _IPXE_SPCR_H */