riscv: function to retrieve SBI implementation version
Provide function sbi_get_impl_version() to retrieve the SBI implementation
version.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
Reviewed-by: Rick Chen <rick@andestech.com>
diff --git a/arch/riscv/lib/sbi.c b/arch/riscv/lib/sbi.c
index 2b53896..d427d1b 100644
--- a/arch/riscv/lib/sbi.c
+++ b/arch/riscv/lib/sbi.c
@@ -90,6 +90,25 @@
}
/**
+ * sbi_get_impl_version() - get SBI implementation version
+ *
+ * @version: pointer to receive version
+ * Return: 0 on success, -ENOTSUPP otherwise
+ */
+int sbi_get_impl_version(long *version)
+{
+ struct sbiret ret;
+
+ ret = sbi_ecall(SBI_EXT_BASE, SBI_EXT_BASE_GET_IMP_VERSION,
+ 0, 0, 0, 0, 0, 0);
+ if (ret.error)
+ return -ENOTSUPP;
+ if (version)
+ *version = ret.value;
+ return 0;
+}
+
+/**
* sbi_probe_extension() - Check if an SBI extension ID is supported or not.
* @extid: The extension ID to be probed.
*