1 files changed, 80 insertions, 0 deletions
diff --git a/include/sbi_utils/fdt/fdt_domain.h b/include/sbi_utils/fdt/fdt_domain.h
new file mode 100644
index 0000000..3c02d56
--- /dev/null
+++ b/include/sbi_utils/fdt/fdt_domain.h
@@ -0,0 +1,80 @@
+// SPDX-License-Identifier: BSD-2-Clause
+/*
+ * fdt_domain.c - Flat Device Tree Domain helper routines
+ *
+ * Copyright (c) 2020 Western Digital Corporation or its affiliates.
+ *
+ * Authors:
+ *   Anup Patel <anup.patel@wdc.com>
+ */
+
+#ifndef __FDT_DOMAIN_H__
+#define __FDT_DOMAIN_H__
+
+#include <sbi/sbi_types.h>
+
+struct sbi_domain;
+
+/**
+ * Iterate over each domains in device tree
+ *
+ * @param fdt device tree blob
+ * @param opaque private pointer for each iteration
+ * @param fn callback function for each iteration
+ */
+void fdt_iterate_each_domain(void *fdt, void *opaque,
+			     void (*fn)(void *fdt, int domain_offset,
+					void *opaque));
+
+/**
+ * Iterate over each memregion of a domain in device tree
+ *
+ * @param fdt device tree blob
+ * @param domain_offset domain DT node offset
+ * @param opaque private pointer for each iteration
+ * @param fn callback function for each iteration
+ */
+void fdt_iterate_each_memregion(void *fdt, int domain_offset, void *opaque,
+				void (*fn)(void *fdt, int domain_offset,
+					   int region_offset, u32 region_access,
+					   void *opaque));
+
+/**
+ * Fix up the domain configuration in the device tree
+ *
+ * This routine:
+ * 1. Disables MMIO devices not accessible to the coldboot HART domain
+ * 2. Removes "opensbi-domain" DT property from CPU DT nodes
+ * 3. Removes domain configuration DT node under /chosen DT node
+ *
+ * It is recommended that platform support call this function in
+ * their final_init() platform operation.
+ *
+ * @param fdt device tree blob
+ */
+void fdt_domain_fixup(void *fdt);
+
+/**
+ * Get domain instance for given HART
+ *
+ * Note: Domains should be populated before using this function.
+ *
+ * @param hartid the HART for which domain instance is needed
+ *
+ * @return pointer to domain instance on success and NULL on failure
+ */
+struct sbi_domain *fdt_domain_get(u32 hartid);
+
+/**
+ * Populate domains from device tree
+ *
+ * It is recommended that platform support call this function in
+ * their domains_init() platform operation.
+ *
+ * @param fdt device tree blob
+ *
+ * @return 0 on success and negative error code on failure
+ */
+int fdt_domains_populate(void *fdt);
+
+#endif /* __FDT_DOMAIN_H__ */