lib: sbi: move sbi_double_trap_handler() to a dedicated header

We will add new functions to sbi_double_trap.c in order to register an
SSE event, split this to a header as part of preparation work.

Signed-off-by: Clément Léger <cleger@rivosinc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

include/sbi/sbi_double_trap.h

@@ -0,0 +1,20 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2025 Rivos Inc.
+ *
+ * Authors:
+ *   Clément Léger <cleger@rivosinc.com>
+ */
+
+#ifndef __SBI_DOUBLE_TRAP_H__
+#define __SBI_DOUBLE_TRAP_H__
+
+#include <sbi/sbi_types.h>
+#include <sbi/sbi_trap.h>
+
+int sbi_double_trap_handler(struct sbi_trap_context *tcntx);
+
+void sbi_double_trap_init(struct sbi_scratch *scratch);
+
+#endif

include/sbi/sbi_trap_ldst.h

@@ -28,8 +28,6 @@ int sbi_load_access_handler(struct sbi_trap_context *tcntx);
 
 int sbi_store_access_handler(struct sbi_trap_context *tcntx);
 
-int sbi_double_trap_handler(struct sbi_trap_context *tcntx);
-
 ulong sbi_misaligned_tinst_fixup(ulong orig_tinst, ulong new_tinst,
 				 ulong addr_offset);
 

lib/sbi/sbi_trap.c

@@ -11,6 +11,7 @@
 #include <sbi/riscv_encoding.h>
 #include <sbi/sbi_bitops.h>
 #include <sbi/sbi_console.h>
+#include <sbi/sbi_double_trap.h>
 #include <sbi/sbi_ecall.h>
 #include <sbi/sbi_error.h>
 #include <sbi/sbi_hart.h>