Initial commit for reference project.
Change-Id: I3cb14334705fa7a83192b54fa6f3e2ada5362a84
diff --git a/qemu_aarch64/BUILD.gn b/qemu_aarch64/BUILD.gn
new file mode 100644
index 0000000..4536f25
--- /dev/null
+++ b/qemu_aarch64/BUILD.gn
@@ -0,0 +1,20 @@
+# Copyright 2018 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+source_set("qemu_aarch64") {
+ sources = [
+ "plat.c",
+ "plat_entry.S",
+ ]
+}
diff --git a/qemu_aarch64/plat.c b/qemu_aarch64/plat.c
new file mode 100644
index 0000000..2ae2686
--- /dev/null
+++ b/qemu_aarch64/plat.c
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2018 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "hf/addr.h"
+#include "hf/dlog.h"
+#include "hf/fdt_handler.h"
+
+/* This is set by plat_entry.S. */
+uintpaddr_t plat_fdt_addr;
+
+paddr_t plat_get_fdt_addr(void)
+{
+ return pa_init(plat_fdt_addr);
+}
+
+void plat_get_initrd_range(paddr_t *begin, paddr_t *end)
+{
+ struct fdt_header *fdt;
+ struct fdt_node n;
+
+ /* Get the memory map from the FDT. */
+ fdt = fdt_map(plat_get_fdt_addr(), &n);
+ if (!fdt) {
+ return;
+ }
+
+ if (!fdt_find_child(&n, "")) {
+ dlog("Unable to find FDT root node.\n");
+ goto out_unmap_fdt;
+ }
+
+ fdt_find_initrd(&n, begin, end);
+
+out_unmap_fdt:
+ if (!fdt_unmap(fdt)) {
+ dlog("Unable to unmap fdt.");
+ }
+}
diff --git a/qemu_aarch64/plat_entry.S b/qemu_aarch64/plat_entry.S
new file mode 100644
index 0000000..84fb281
--- /dev/null
+++ b/qemu_aarch64/plat_entry.S
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2018 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+.section .init.plat_entry, "ax"
+.global plat_entry
+plat_entry:
+ /* Save the FDT to a global variable. */
+ adrp x25, plat_fdt_addr
+ add x25, x25, :lo12:plat_fdt_addr
+ str x0, [x25]
+
+ ret