lib/sbi/sbi_ecall_ipi.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43

/*
 * 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_error.h>
#include <sbi/sbi_ecall.h>
#include <sbi/sbi_ecall_interface.h>
#include <sbi/sbi_trap.h>
#include <sbi/sbi_ipi.h>

static int sbi_ecall_ipi_handler(unsigned long extid, unsigned long funcid,
				 struct sbi_trap_regs *regs,
				 struct sbi_ecall_return *out)
{
	int ret = 0;

	if (funcid == SBI_EXT_IPI_SEND_IPI)
		ret = sbi_ipi_send_smode(regs->a0, regs->a1);
	else
		ret = SBI_ENOTSUPP;

	return ret;
}

struct sbi_ecall_extension ecall_ipi;

static int sbi_ecall_ipi_register_extensions(void)
{
	return sbi_ecall_register_extension(&ecall_ipi);
}

struct sbi_ecall_extension ecall_ipi = {
	.extid_start		= SBI_EXT_IPI,
	.extid_end		= SBI_EXT_IPI,
	.register_extensions	= sbi_ecall_ipi_register_extensions,
	.handle			= sbi_ecall_ipi_handler,
};