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7738345396
The CLINT in the Allwinner D1 SoC apparently does not support 64-bit MMIO access. A property was added to support this quirk (and that property was copied to the ACLINT MTIMER code). However, since this difference in behavior makes the D1 CLINT incompatible with the SiFive CLINT's programming interface, a better solution is to use a separate compatible string. Signed-off-by: Samuel Holland <samuel@sholland.org> Reviewed-by: Anup Patel <anup@brainfault.org>
70 lines
1.6 KiB
C
70 lines
1.6 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 <sbi/sbi_error.h>
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#include <sbi_utils/fdt/fdt_helper.h>
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#include <sbi_utils/ipi/fdt_ipi.h>
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#include <sbi_utils/ipi/aclint_mswi.h>
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#define MSWI_MAX_NR 16
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static unsigned long mswi_count = 0;
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static struct aclint_mswi_data mswi[MSWI_MAX_NR];
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static int ipi_mswi_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_mswi_data *ms;
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if (MSWI_MAX_NR <= mswi_count)
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return SBI_ENOSPC;
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ms = &mswi[mswi_count];
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rc = fdt_parse_aclint_node(fdt, nodeoff, false,
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&ms->addr, &ms->size, NULL, NULL,
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&ms->first_hartid, &ms->hart_count);
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if (rc)
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return rc;
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if (match->data) {
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/* Adjust MSWI address and size for CLINT device */
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offset = *((unsigned long *)match->data);
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ms->addr += offset;
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if ((ms->size - offset) < ACLINT_MSWI_SIZE)
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return SBI_EINVAL;
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ms->size = ACLINT_MSWI_SIZE;
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}
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rc = aclint_mswi_cold_init(ms);
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if (rc)
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return rc;
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mswi_count++;
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return 0;
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}
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static const unsigned long clint_offset = CLINT_MSWI_OFFSET;
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static const struct fdt_match ipi_mswi_match[] = {
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{ .compatible = "allwinner,sun20i-d1-clint", .data = &clint_offset },
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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-mswi" },
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{ },
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};
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struct fdt_ipi fdt_ipi_mswi = {
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.match_table = ipi_mswi_match,
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.cold_init = ipi_mswi_cold_init,
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.warm_init = aclint_mswi_warm_init,
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.exit = NULL,
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};
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