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03d6bb51ba
We add a new FDT based ACLINT MTIMER driver which works for both CLINT device and standalone ACLINT MTIMER 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>
74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2021 Western Digital Corporation or its affiliates.
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*
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* Authors:
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* Anup Patel <anup.patel@wdc.com>
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*/
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#include <libfdt.h>
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#include <sbi/sbi_error.h>
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#include <sbi_utils/fdt/fdt_helper.h>
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#include <sbi_utils/timer/fdt_timer.h>
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#include <sbi_utils/timer/aclint_mtimer.h>
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#define MTIMER_MAX_NR 16
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static unsigned long mtimer_count = 0;
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static struct aclint_mtimer_data mtimer[MTIMER_MAX_NR];
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static int timer_mtimer_cold_init(void *fdt, int nodeoff,
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const struct fdt_match *match)
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{
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int rc;
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unsigned long offset;
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struct aclint_mtimer_data *mt, *mtmaster = NULL;
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if (MTIMER_MAX_NR <= mtimer_count)
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return SBI_ENOSPC;
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mt = &mtimer[mtimer_count];
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if (0 < mtimer_count)
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mtmaster = &mtimer[0];
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rc = fdt_parse_aclint_node(fdt, nodeoff, true, &mt->addr, &mt->size,
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&mt->first_hartid, &mt->hart_count);
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if (rc)
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return rc;
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mt->has_64bit_mmio = true;
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if (match->data) {
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/* Adjust MTIMER address and size for CLINT device */
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offset = *((unsigned long *)match->data);
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mt->addr += offset;
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if ((mt->size - offset) < ACLINT_MTIMER_SIZE)
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return SBI_EINVAL;
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mt->size -= offset;
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/* Parse additional CLINT properties */
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if (fdt_getprop(fdt, nodeoff, "clint,has-no-64bit-mmio", &rc))
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mt->has_64bit_mmio = false;
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}
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rc = aclint_mtimer_cold_init(mt, mtmaster);
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if (rc)
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return rc;
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mtimer_count++;
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return 0;
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}
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static unsigned long clint_offset = CLINT_MTIMER_OFFSET;
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static const struct fdt_match timer_mtimer_match[] = {
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{ .compatible = "riscv,clint0", .data = &clint_offset },
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{ .compatible = "sifive,clint0", .data = &clint_offset },
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{ .compatible = "riscv,aclint-mtimer" },
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{ },
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};
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struct fdt_timer fdt_timer_mtimer = {
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.match_table = timer_mtimer_match,
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.cold_init = timer_mtimer_cold_init,
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.warm_init = aclint_mtimer_warm_init,
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.exit = NULL,
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};
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