ACPI: Add definitions for the SPCR table

SPCR is the Serial Port Console Redirection Table. See the document
linked from http://uefi.org/acpi. For serial port types, "Interface
Type", see the documentation for the Debug Port Table 2 (DBG2).

Signed-off-by: Andrew Jones <drjones@redhat.com>
Tested-by: Shannon Zhao <shannon.zhao@linaro.org>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Message-id: 1433929959-29530-2-git-send-email-drjones@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

include/hw/acpi/acpi-defs.h

@@ -196,6 +196,38 @@ enum {
     ACPI_FADT_ARM_PSCI_USE_HVC = 1,
 };
 
+/*
+ * Serial Port Console Redirection Table (SPCR), Rev. 1.02
+ *
+ * For .interface_type see Debug Port Table 2 (DBG2) serial port
+ * subtypes in Table 3, Rev. May 22, 2012
+ */
+struct AcpiSerialPortConsoleRedirection {
+    ACPI_TABLE_HEADER_DEF
+    uint8_t  interface_type;
+    uint8_t  reserved1[3];
+    struct AcpiGenericAddress base_address;
+    uint8_t  interrupt_types;
+    uint8_t  irq;
+    uint32_t gsi;
+    uint8_t  baud;
+    uint8_t  parity;
+    uint8_t  stopbits;
+    uint8_t  flowctrl;
+    uint8_t  term_type;
+    uint8_t  reserved2;
+    uint16_t pci_device_id;
+    uint16_t pci_vendor_id;
+    uint8_t  pci_bus;
+    uint8_t  pci_slot;
+    uint8_t  pci_func;
+    uint32_t pci_flags;
+    uint8_t  pci_seg;
+    uint32_t reserved3;
+} QEMU_PACKED;
+typedef struct AcpiSerialPortConsoleRedirection
+               AcpiSerialPortConsoleRedirection;
+
 /*
  * ACPI 1.0 Root System Description Table (RSDT)
  */