1 files changed, 36 insertions, 0 deletions
diff --git a/roms/seabios/src/fw/ssdt-pcihp.dsl b/roms/seabios/src/fw/ssdt-pcihp.dsl
new file mode 100644
index 00000000..cb24c11c
--- /dev/null
+++ b/roms/seabios/src/fw/ssdt-pcihp.dsl
@@ -0,0 +1,36 @@
+ACPI_EXTRACT_ALL_CODE ssdp_pcihp_aml
+
+DefinitionBlock ("ssdt-pcihp.aml", "SSDT", 0x01, "BXPC", "BXSSDTPCIHP", 0x1)
+{
+
+/****************************************************************
+ * PCI hotplug
+ ****************************************************************/
+
+    /* Objects supplied by DSDT */
+    External(\_SB.PCI0, DeviceObj)
+    External(\_SB.PCI0.PCEJ, MethodObj)
+
+    Scope(\_SB.PCI0) {
+
+        /* Bulk generated PCI hotplug devices */
+        ACPI_EXTRACT_DEVICE_START ssdt_pcihp_start
+        ACPI_EXTRACT_DEVICE_END ssdt_pcihp_end
+        ACPI_EXTRACT_DEVICE_STRING ssdt_pcihp_name
+
+        // Method _EJ0 can be patched by BIOS to EJ0_
+        // at runtime, if the slot is detected to not support hotplug.
+        // Extract the offset of the address dword and the
+        // _EJ0 name to allow this patching.
+        Device(SAA) {
+            ACPI_EXTRACT_NAME_BYTE_CONST ssdt_pcihp_id
+            Name(_SUN, 0xAA)
+            ACPI_EXTRACT_NAME_DWORD_CONST ssdt_pcihp_adr
+            Name(_ADR, 0xAA0000)
+            ACPI_EXTRACT_METHOD_STRING ssdt_pcihp_ej0
+            Method(_EJ0, 1) {
+                PCEJ(_SUN)
+            }
+        }
+    }
+}