1 files changed, 122 insertions, 0 deletions
diff --git a/FreeRTOS/Demo/RISC-V_RV32_SiFive_HiFive1-RevB_FreedomStudio/bsp/install/include/metal/privilege.h b/FreeRTOS/Demo/RISC-V_RV32_SiFive_HiFive1-RevB_FreedomStudio/bsp/install/include/metal/privilege.h
new file mode 100644
index 000000000..c5212e5d1
--- /dev/null
+++ b/FreeRTOS/Demo/RISC-V_RV32_SiFive_HiFive1-RevB_FreedomStudio/bsp/install/include/metal/privilege.h
@@ -0,0 +1,122 @@
+/* Copyright 2019 SiFive, Inc */
+/* SPDX-License-Identifier: Apache-2.0 */
+
+#ifndef METAL__PRIVILEGE_H
+#define METAL__PRIVILEGE_H
+
+/*!
+ * @file metal/privilege.h
+ *
+ * @brief API for manipulating the privilege mode of a RISC-V system
+ *
+ * Additional information about privilege modes on RISC-V systems can be found
+ * by reading the RISC-V Privileged Architecture Specification v1.10.
+ */
+
+#include <stdint.h>
+
+enum metal_privilege_mode {
+	METAL_PRIVILEGE_USER = 0,
+	METAL_PRIVILEGE_SUPERVISOR = 1,
+	METAL_PRIVELEGE_MACHINE = 3,
+};
+
+#if __riscv_xlen == 32
+typedef uint32_t metal_xreg_t;
+#elif __riscv_xlen == 64
+typedef uint64_t metal_xreg_t;
+#endif
+
+#if __riscv_flen == 32
+typedef uint32_t metal_freg_t;
+#elif __riscv_flen == 64
+typedef uint64_t metal_freg_t;
+#endif
+
+struct metal_register_file {
+	metal_xreg_t ra;
+	metal_xreg_t sp;
+	metal_xreg_t gp;
+	metal_xreg_t tp;
+
+	metal_xreg_t t0;
+	metal_xreg_t t1;
+	metal_xreg_t t2;
+
+	metal_xreg_t s0;
+	metal_xreg_t s1;
+
+	metal_xreg_t a0;
+	metal_xreg_t a1;
+	metal_xreg_t a2;
+	metal_xreg_t a3;
+	metal_xreg_t a4;
+	metal_xreg_t a5;
+#ifndef __riscv_32e
+	metal_xreg_t a6;
+	metal_xreg_t a7;
+
+	metal_xreg_t s2;
+	metal_xreg_t s3;
+	metal_xreg_t s4;
+	metal_xreg_t s5;
+	metal_xreg_t s6;
+	metal_xreg_t s7;
+	metal_xreg_t s8;
+	metal_xreg_t s9;
+	metal_xreg_t s10;
+	metal_xreg_t s11;
+
+	metal_xreg_t t3;
+	metal_xreg_t t4;
+	metal_xreg_t t5;
+	metal_xreg_t t6;
+#endif /* __riscv_32e */
+
+#ifdef __riscv_flen
+	metal_freg_t ft0;
+	metal_freg_t ft1;
+	metal_freg_t ft2;
+	metal_freg_t ft3;
+	metal_freg_t ft4;
+	metal_freg_t ft5;
+	metal_freg_t ft6;
+	metal_freg_t ft7;
+
+	metal_freg_t fs0;
+	metal_freg_t fs1;
+
+	metal_freg_t fa0;
+	metal_freg_t fa1;
+	metal_freg_t fa2;
+	metal_freg_t fa3;
+	metal_freg_t fa4;
+	metal_freg_t fa5;
+	metal_freg_t fa6;
+	metal_freg_t fa7;
+
+	metal_freg_t fs2;
+	metal_freg_t fs3;
+	metal_freg_t fs4;
+	metal_freg_t fs5;
+	metal_freg_t fs6;
+	metal_freg_t fs7;
+	metal_freg_t fs8;
+	metal_freg_t fs9;
+	metal_freg_t fs10;
+	metal_freg_t fs11;
+
+	metal_freg_t ft8;
+	metal_freg_t ft9;
+	metal_freg_t ft10;
+	metal_freg_t ft11;
+#endif /* __riscv_flen */
+};
+
+typedef void (*metal_privilege_entry_point_t)();
+
+void metal_privilege_drop_to_mode(enum metal_privilege_mode mode,
+				  struct metal_register_file regfile,
+				  metal_privilege_entry_point_t entry_point);
+
+#endif