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/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2020 Western Digital Corporation or its affiliates.
*
* Authors:
* Anup Patel <anup.patel@wdc.com>
* Atish Patra <atish.patra@wdc.com>
*/
#include <sbi/sbi_ecall.h>
#include <sbi/sbi_ecall_interface.h>
#include <sbi/sbi_error.h>
#include <sbi/sbi_platform.h>
#include <sbi/sbi_trap.h>
#include <sbi/riscv_asm.h>
static inline unsigned long sbi_ecall_vendor_id(void)
{
return SBI_EXT_VENDOR_START +
(csr_read(CSR_MVENDORID) &
(SBI_EXT_VENDOR_END - SBI_EXT_VENDOR_START));
}
static int sbi_ecall_vendor_probe(unsigned long extid,
unsigned long *out_val)
{
if (!sbi_platform_vendor_ext_check(sbi_platform_thishart_ptr()) ||
extid != sbi_ecall_vendor_id())
*out_val = 0;
else
*out_val = 1;
return 0;
}
static int sbi_ecall_vendor_handler(unsigned long extid, unsigned long funcid,
const struct sbi_trap_regs *regs,
unsigned long *out_val,
struct sbi_trap_info *out_trap)
{
if (!sbi_platform_vendor_ext_check(sbi_platform_thishart_ptr()) ||
extid != sbi_ecall_vendor_id())
return SBI_ERR_NOT_SUPPORTED;
return sbi_platform_vendor_ext_provider(sbi_platform_thishart_ptr(),
funcid, regs,
out_val, out_trap);
}
struct sbi_ecall_extension ecall_vendor = {
.extid_start = SBI_EXT_VENDOR_START,
.extid_end = SBI_EXT_VENDOR_END,
.probe = sbi_ecall_vendor_probe,
.handle = sbi_ecall_vendor_handler,
};
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