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