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/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2020 Western Digital Corporation or its affiliates.
*
* Authors:
* Anup Patel <[email protected]>
* Atish Patra <[email protected]>
*/
#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/riscv_asm.h>
static int sbi_ecall_base_probe(unsigned long extid, unsigned long *out_val)
{
struct sbi_ecall_extension *ext;
ext = sbi_ecall_find_extension(extid);
if (!ext) {
*out_val = 0;
return 0;
}
if (ext->probe)
return ext->probe(extid, out_val);
*out_val = 1;
return 0;
}
static int sbi_ecall_base_handler(unsigned long extid, unsigned long funcid,
struct sbi_trap_regs *regs,
struct sbi_ecall_return *out)
{
int ret = 0;
switch (funcid) {
case SBI_EXT_BASE_GET_SPEC_VERSION:
out->value = (SBI_ECALL_VERSION_MAJOR <<
SBI_SPEC_VERSION_MAJOR_OFFSET) &
(SBI_SPEC_VERSION_MAJOR_MASK <<
SBI_SPEC_VERSION_MAJOR_OFFSET);
out->value = out->value | SBI_ECALL_VERSION_MINOR;
break;
case SBI_EXT_BASE_GET_IMP_ID:
out->value = sbi_ecall_get_impid();
break;
case SBI_EXT_BASE_GET_IMP_VERSION:
out->value = OPENSBI_VERSION;
break;
case SBI_EXT_BASE_GET_MVENDORID:
out->value = csr_read(CSR_MVENDORID);
break;
case SBI_EXT_BASE_GET_MARCHID:
out->value = csr_read(CSR_MARCHID);
break;
case SBI_EXT_BASE_GET_MIMPID:
out->value = csr_read(CSR_MIMPID);
break;
case SBI_EXT_BASE_PROBE_EXT:
ret = sbi_ecall_base_probe(regs->a0, &out->value);
break;
default:
ret = SBI_ENOTSUPP;
}
return ret;
}
struct sbi_ecall_extension ecall_base;
static int sbi_ecall_base_register_extensions(void)
{
return sbi_ecall_register_extension(&ecall_base);
}
struct sbi_ecall_extension ecall_base = {
.name = "base",
.extid_start = SBI_EXT_BASE,
.extid_end = SBI_EXT_BASE,
.register_extensions = sbi_ecall_base_register_extensions,
.handle = sbi_ecall_base_handler,
};
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