mirror of
https://github.com/riscv-software-src/opensbi.git
synced 2025-08-25 15:51:41 +01:00
56fc5f7618
We add a new FDT based ACLINT MSWI IPI driver which works for both CLINT device and standalone ACLINT MSWI device. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Xiang W <wxjstz@126.com>
68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
/*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*
|
|
* Copyright (c) 2021 Western Digital Corporation or its affiliates.
|
|
*
|
|
* Authors:
|
|
* Anup Patel <anup.patel@wdc.com>
|
|
*/
|
|
|
|
#include <sbi/sbi_error.h>
|
|
#include <sbi_utils/fdt/fdt_helper.h>
|
|
#include <sbi_utils/ipi/fdt_ipi.h>
|
|
#include <sbi_utils/ipi/aclint_mswi.h>
|
|
|
|
#define MSWI_MAX_NR 16
|
|
|
|
static unsigned long mswi_count = 0;
|
|
static struct aclint_mswi_data mswi[MSWI_MAX_NR];
|
|
|
|
static int ipi_mswi_cold_init(void *fdt, int nodeoff,
|
|
const struct fdt_match *match)
|
|
{
|
|
int rc;
|
|
unsigned long offset;
|
|
struct aclint_mswi_data *ms;
|
|
|
|
if (MSWI_MAX_NR <= mswi_count)
|
|
return SBI_ENOSPC;
|
|
ms = &mswi[mswi_count];
|
|
|
|
rc = fdt_parse_aclint_node(fdt, nodeoff, false, &ms->addr, &ms->size,
|
|
&ms->first_hartid, &ms->hart_count);
|
|
if (rc)
|
|
return rc;
|
|
|
|
if (match->data) {
|
|
/* Adjust MSWI address and size for CLINT device */
|
|
offset = *((unsigned long *)match->data);
|
|
ms->addr += offset;
|
|
if ((ms->size - offset) < ACLINT_MSWI_SIZE)
|
|
return SBI_EINVAL;
|
|
ms->size = ACLINT_MSWI_SIZE;
|
|
}
|
|
|
|
rc = aclint_mswi_cold_init(ms);
|
|
if (rc)
|
|
return rc;
|
|
|
|
mswi_count++;
|
|
return 0;
|
|
}
|
|
|
|
static unsigned long clint_offset = CLINT_MSWI_OFFSET;
|
|
|
|
static const struct fdt_match ipi_mswi_match[] = {
|
|
{ .compatible = "riscv,clint0", .data = &clint_offset },
|
|
{ .compatible = "sifive,clint0", .data = &clint_offset },
|
|
{ .compatible = "riscv,aclint-mswi" },
|
|
{ },
|
|
};
|
|
|
|
struct fdt_ipi fdt_ipi_mswi = {
|
|
.match_table = ipi_mswi_match,
|
|
.cold_init = ipi_mswi_cold_init,
|
|
.warm_init = aclint_mswi_warm_init,
|
|
.exit = NULL,
|
|
};
|