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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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