[PATCH 3/3] lib: Add error messages via conditional compilation for the future

[Xiang W]

On 128-bit machines, sbi_load_xx/sbi_store_xx needs to be improved.
Through this conditional compile, the corresponding implementation
can be prompted to be added.

Signed-off-by: Xiang W <wxjstz at 126.com>
---
 lib/sbi/sbi_unpriv.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/sbi/sbi_unpriv.c b/lib/sbi/sbi_unpriv.c
index 4246124..73b530c 100644
--- a/lib/sbi/sbi_unpriv.c
+++ b/lib/sbi/sbi_unpriv.c
@@ -83,7 +83,7 @@ DEFINE_UNPRIVILEGED_LOAD_FUNCTION(u32, lwu)
 DEFINE_UNPRIVILEGED_LOAD_FUNCTION(u64, ld)
 DEFINE_UNPRIVILEGED_STORE_FUNCTION(u64, sd)
 DEFINE_UNPRIVILEGED_LOAD_FUNCTION(ulong, ld)
-#else
+#elif __riscv_xlen == 32
 DEFINE_UNPRIVILEGED_LOAD_FUNCTION(u32, lw)
 DEFINE_UNPRIVILEGED_LOAD_FUNCTION(ulong, lw)
 
@@ -112,6 +112,8 @@ void sbi_store_u64(u64 *addr, u64 val,
 	if (trap->cause)
 		return;
 }
+#else
+# error "Unexpected __riscv_xlen"
 #endif
 
 ulong sbi_get_insn(ulong mepc, struct sbi_trap_info *trap)
-- 
2.30.2