1 files changed, 76 insertions, 0 deletions
diff --git a/src/arch/riscv/interface/sbi/sbi_reboot.c b/src/arch/riscv/interface/sbi/sbi_reboot.c
new file mode 100644
index 000000000..64365b0d3
--- /dev/null
+++ b/src/arch/riscv/interface/sbi/sbi_reboot.c
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2024 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
+
+/** @file
+ *
+ * Supervisor Binary Interface (SBI) reboot mechanism
+ *
+ */
+
+#include <errno.h>
+#include <string.h>
+#include <ipxe/sbi.h>
+#include <ipxe/reboot.h>
+
+/**
+ * Reboot system
+ *
+ * @v warm		Perform a warm reboot
+ */
+static void sbi_reboot ( int warm ) {
+	struct sbi_return ret;
+	int rc;
+
+	/* Reboot system */
+	ret = sbi_ecall_2 ( SBI_SRST, SBI_SRST_SYSTEM_RESET,
+			    ( warm ? SBI_RESET_WARM : SBI_RESET_COLD ), 0 );
+
+	/* Any return is an error */
+	rc = -ESBI ( ret.error );
+	DBGC ( SBI_SRST, "SBI %s reset failed: %s\n",
+	       ( warm ? "warm" : "cold" ), strerror ( rc ) );
+}
+
+/**
+ * Power off system
+ *
+ * @ret rc		Return status code
+ */
+static int sbi_poweroff ( void ) {
+	struct sbi_return ret;
+	int rc;
+
+	/* Shut down system */
+	ret = sbi_ecall_2 ( SBI_SRST, SBI_SRST_SYSTEM_RESET,
+			    SBI_RESET_SHUTDOWN, 0 );
+
+	/* Any return is an error */
+	rc = -ESBI ( ret.error );
+	DBGC ( SBI_SRST, "SBI shutdown failed: %s\n", strerror ( rc ) );
+	return rc;
+}
+
+PROVIDE_REBOOT ( sbi, reboot, sbi_reboot );
+PROVIDE_REBOOT ( sbi, poweroff, sbi_poweroff );