1 files changed, 58 insertions, 0 deletions
diff --git a/services/std_svc/rmmd/trp/trp_helpers.c b/services/std_svc/rmmd/trp/trp_helpers.c
new file mode 100644
index 0000000..159f3a5
--- /dev/null
+++ b/services/std_svc/rmmd/trp/trp_helpers.c
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2022, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+
+#include <plat/common/platform.h>
+#include <services/rmmd_svc.h>
+#include "trp_private.h"
+
+/*
+ * Per cpu data structure to populate parameters for an SMC in C code and use
+ * a pointer to this structure in assembler code to populate x0-x7
+ */
+static trp_args_t trp_smc_args[PLATFORM_CORE_COUNT];
+
+/*
+ * Set the arguments for SMC call
+ */
+trp_args_t *set_smc_args(uint64_t arg0,
+			uint64_t arg1,
+			uint64_t arg2,
+			uint64_t arg3,
+			uint64_t arg4,
+			uint64_t arg5,
+			uint64_t arg6,
+			uint64_t arg7)
+{
+	uint32_t linear_id;
+	trp_args_t *pcpu_smc_args;
+
+	/*
+	 * Return to Secure Monitor by raising an SMC. The results of the
+	 * service are passed as an arguments to the SMC
+	 */
+	linear_id = plat_my_core_pos();
+	pcpu_smc_args = &trp_smc_args[linear_id];
+	write_trp_arg(pcpu_smc_args, TRP_ARG0, arg0);
+	write_trp_arg(pcpu_smc_args, TRP_ARG1, arg1);
+	write_trp_arg(pcpu_smc_args, TRP_ARG2, arg2);
+	write_trp_arg(pcpu_smc_args, TRP_ARG3, arg3);
+	write_trp_arg(pcpu_smc_args, TRP_ARG4, arg4);
+	write_trp_arg(pcpu_smc_args, TRP_ARG5, arg5);
+	write_trp_arg(pcpu_smc_args, TRP_ARG6, arg6);
+	write_trp_arg(pcpu_smc_args, TRP_ARG7, arg7);
+
+	return pcpu_smc_args;
+}
+
+/*
+ * Abort the boot process with the reason given in err.
+ */
+__dead2 void trp_boot_abort(uint64_t err)
+{
+	(void)trp_smc(set_smc_args(RMM_BOOT_COMPLETE, err, 0, 0, 0, 0, 0, 0));
+	panic();
+}