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- /*
- * SPDX-License-Identifier: BSD-2-Clause
- *
- * Copyright (c) 2020 Western Digital Corporation or its affiliates.
- *
- * Authors:
- * Atish Patra <atish.patra@wdc.com>
- */
- #include <sbi/sbi_domain.h>
- #include <sbi/sbi_ecall.h>
- #include <sbi/sbi_ecall_interface.h>
- #include <sbi/sbi_error.h>
- #include <sbi/sbi_trap.h>
- #include <sbi/sbi_version.h>
- #include <sbi/sbi_hsm.h>
- #include <sbi/sbi_scratch.h>
- #include <sbi/riscv_asm.h>
- static int sbi_ecall_hsm_handler(unsigned long extid, unsigned long funcid,
- const struct sbi_trap_regs *regs,
- unsigned long *out_val,
- struct sbi_trap_info *out_trap)
- {
- ulong smode;
- int ret = 0, hstate;
- struct sbi_scratch *scratch = sbi_scratch_thishart_ptr();
- switch (funcid) {
- case SBI_EXT_HSM_HART_START:
- smode = csr_read(CSR_MSTATUS);
- smode = (smode & MSTATUS_MPP) >> MSTATUS_MPP_SHIFT;
- ret = sbi_hsm_hart_start(scratch, sbi_domain_thishart_ptr(),
- regs->a0, regs->a1, smode, regs->a2);
- break;
- case SBI_EXT_HSM_HART_STOP:
- ret = sbi_hsm_hart_stop(scratch, TRUE);
- break;
- case SBI_EXT_HSM_HART_GET_STATUS:
- hstate = sbi_hsm_hart_get_state(sbi_domain_thishart_ptr(),
- regs->a0);
- ret = sbi_hsm_hart_state_to_status(hstate);
- break;
- default:
- ret = SBI_ENOTSUPP;
- };
- if (ret >= 0) {
- *out_val = ret;
- ret = 0;
- }
- return ret;
- }
- struct sbi_ecall_extension ecall_hsm = {
- .extid_start = SBI_EXT_HSM,
- .extid_end = SBI_EXT_HSM,
- .handle = sbi_ecall_hsm_handler,
- };
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