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/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2021 Western Digital Corporation or its affiliates.
* Copyright (c) 2022 Ventana Micro Systems Inc.
*
* Authors:
* Anup Patel <[email protected]>
*/
#include <libfdt.h>
#include <sbi/riscv_asm.h>
#include <sbi/sbi_error.h>
#include <sbi/sbi_heap.h>
#include <sbi_utils/fdt/fdt_helper.h>
#include <sbi_utils/irqchip/fdt_irqchip.h>
#include <sbi_utils/irqchip/aplic.h>
static int irqchip_aplic_update_idc_map(const void *fdt, int nodeoff,
struct aplic_data *pd)
{
int i, err, count, cpu_offset, cpu_intc_offset;
u32 phandle, hartid, hartindex;
const fdt32_t *val;
val = fdt_getprop(fdt, nodeoff, "interrupts-extended", &count);
if (!val || count < sizeof(fdt32_t))
return SBI_EINVAL;
count = count / sizeof(fdt32_t);
for (i = 0; i < count; i += 2) {
phandle = fdt32_to_cpu(val[i]);
cpu_intc_offset = fdt_node_offset_by_phandle(fdt, phandle);
if (cpu_intc_offset < 0)
continue;
cpu_offset = fdt_parent_offset(fdt, cpu_intc_offset);
if (cpu_offset < 0)
continue;
err = fdt_parse_hart_id(fdt, cpu_offset, &hartid);
if (err)
continue;
hartindex = sbi_hartid_to_hartindex(hartid);
if (hartindex == -1U)
continue;
pd->idc_map[i / 2] = hartindex;
}
return 0;
}
static int irqchip_aplic_cold_init(const void *fdt, int nodeoff,
const struct fdt_match *match)
{
int rc;
struct aplic_data *pd;
pd = sbi_zalloc(sizeof(*pd));
if (!pd)
return SBI_ENOMEM;
rc = fdt_parse_aplic_node(fdt, nodeoff, pd);
if (rc)
goto fail_free_data;
if (pd->num_idc) {
pd->idc_map = sbi_zalloc(sizeof(*pd->idc_map) * pd->num_idc);
if (!pd->idc_map) {
rc = SBI_ENOMEM;
goto fail_free_data;
}
rc = irqchip_aplic_update_idc_map(fdt, nodeoff, pd);
if (rc)
goto fail_free_idc_map;
}
rc = aplic_cold_irqchip_init(pd);
if (rc)
goto fail_free_idc_map;
return 0;
fail_free_idc_map:
if (pd->num_idc)
sbi_free(pd->idc_map);
fail_free_data:
sbi_free(pd);
return rc;
}
static const struct fdt_match irqchip_aplic_match[] = {
{ .compatible = "riscv,aplic" },
{ },
};
const struct fdt_driver fdt_irqchip_aplic = {
.match_table = irqchip_aplic_match,
.init = irqchip_aplic_cold_init,
};
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