Add SiP service to configure Arm Ethos-N NPU
By default the Arm Ethos-N NPU will boot up in secure mode. In this mode
the non-secure world cannot access the registers needed to use the NPU.
To still allow the non-secure world to use the NPU, a SiP service has
been added that can delegate non-secure access to the registers needed
to use it.
Only the HW_CONFIG for the Arm Juno platform has been updated to include
the device tree for the NPU and the platform currently only loads the
HW_CONFIG in AArch64 builds.
Signed-off-by: Mikael Olsson <mikael.olsson@arm.com>
Change-Id: I65dfd864042ed43faae0a259dcf319cbadb5f3d2
diff --git a/include/plat/arm/common/fconf_ethosn_getter.h b/include/plat/arm/common/fconf_ethosn_getter.h
new file mode 100644
index 0000000..0fd1f02
--- /dev/null
+++ b/include/plat/arm/common/fconf_ethosn_getter.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2021, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef FCONF_ETHOSN_GETTER_H
+#define FCONF_ETHOSN_GETTER_H
+
+#include <assert.h>
+
+#include <lib/fconf/fconf.h>
+
+#define hw_config__ethosn_config_getter(prop) ethosn_config.prop
+#define hw_config__ethosn_core_addr_getter(idx) __extension__ ({ \
+ assert(idx < ethosn_config.num_cores); \
+ ethosn_config.core_addr[idx]; \
+})
+
+#define ETHOSN_STATUS_DISABLED U(0)
+#define ETHOSN_STATUS_ENABLED U(1)
+
+#define ETHOSN_CORE_NUM_MAX U(64)
+
+struct ethosn_config_t {
+ uint8_t status;
+ uint32_t num_cores;
+ uint64_t core_addr[ETHOSN_CORE_NUM_MAX];
+};
+
+int fconf_populate_arm_ethosn(uintptr_t config);
+
+extern struct ethosn_config_t ethosn_config;
+
+#endif /* FCONF_ETHOSN_GETTER_H */