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diff --git a/usr.sbin/bhyve/acpi_device.h b/usr.sbin/bhyve/acpi_device.h
--- a/usr.sbin/bhyve/acpi_device.h
+++ b/usr.sbin/bhyve/acpi_device.h
@@ -34,3 +34,5 @@
const UINT16 port, UINT8 length);
int acpi_device_add_res_fixed_memory32(struct acpi_device *const dev,
const UINT8 write_protected, const UINT32 address, const UINT32 length);
+
+void acpi_device_write_dsdt(const struct acpi_device *const dev);
diff --git a/usr.sbin/bhyve/acpi_device.c b/usr.sbin/bhyve/acpi_device.c
--- a/usr.sbin/bhyve/acpi_device.c
+++ b/usr.sbin/bhyve/acpi_device.c
@@ -141,3 +141,52 @@
return (0);
}
+
+static void
+acpi_device_write_dsdt_crs(const struct acpi_device *const dev)
+{
+ const struct acpi_resource_list_entry *res;
+ SLIST_FOREACH (res, &dev->crs, chain) {
+ switch (res->type) {
+ case ACPI_RESOURCE_TYPE_FIXED_IO:
+ dsdt_fixed_ioport(res->data.FixedIo.Address,
+ res->data.FixedIo.AddressLength);
+ break;
+ case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: {
+ dsdt_fixed_mem32(res->data.FixedMemory32.Address,
+ res->data.FixedMemory32.AddressLength);
+ break;
+ }
+ case ACPI_RESOURCE_TYPE_END_TAG:
+ break;
+ default:
+ warnx("%s: unknown resource type %d", __func__,
+ res->type);
+ return;
+ }
+ }
+}
+
+void
+acpi_device_write_dsdt(const struct acpi_device *const dev)
+{
+ if (dev == NULL) {
+ return;
+ }
+
+ dsdt_line("");
+ dsdt_line(" Scope (\\_SB)");
+ dsdt_line(" {");
+ dsdt_line(" Device (%s)", dev->name);
+ dsdt_line(" {");
+ dsdt_line(" Name (_HID, \"%s\")", dev->hid);
+ dsdt_line(" Name (_STA, 0x0F)");
+ dsdt_line(" Name (_CRS, ResourceTemplate ()");
+ dsdt_line(" {");
+ dsdt_indent(4);
+ acpi_device_write_dsdt_crs(dev);
+ dsdt_unindent(4);
+ dsdt_line(" })");
+ dsdt_line(" }");
+ dsdt_line(" }");
+}

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