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@@ -0,0 +1,48 @@
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+// SPDX-License-Identifier: BSD-2-Clause
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+#include <sbi/sbi_ecall.h>
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+#include <sbi/sbi_ecall_interface.h>
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+#include <sbi/sbi_error.h>
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+#include <sbi/sbi_trap.h>
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+#include <sbi/sbi_system.h>
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+
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+static int sbi_ecall_susp_handler(unsigned long extid, unsigned long funcid,
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+ const struct sbi_trap_regs *regs,
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+ unsigned long *out_val,
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+ struct sbi_trap_info *out_trap)
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+{
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+ int ret = SBI_ENOTSUPP;
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+
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+ if (funcid == SBI_EXT_SUSP_SUSPEND)
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+ ret = sbi_system_suspend(regs->a0, regs->a1, regs->a2);
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+
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+ if (ret >= 0) {
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+ *out_val = ret;
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+ ret = 0;
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+ }
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+
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+ return ret;
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+}
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+
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+static int sbi_ecall_susp_probe(unsigned long extid, unsigned long *out_val)
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+{
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+ u32 type, count = 0;
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+
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+ /*
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+ * At least one suspend type should be supported by the
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+ * platform for the SBI SUSP extension to be usable.
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+ */
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+ for (type = 0; type <= SBI_SUSP_SLEEP_TYPE_LAST; type++) {
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+ if (sbi_system_suspend_supported(type))
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+ count++;
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+ }
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+
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+ *out_val = count ? 1 : 0;
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+ return 0;
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+}
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+
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+struct sbi_ecall_extension ecall_susp = {
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+ .extid_start = SBI_EXT_SUSP,
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+ .extid_end = SBI_EXT_SUSP,
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+ .handle = sbi_ecall_susp_handler,
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+ .probe = sbi_ecall_susp_probe,
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+};
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