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/* SPDX-License-Identifier: Apache-2.0
* Copyright (c) 2023 Cisco Systems, Inc.
*/
#include <vppinfra/clib.h>
#include <vppinfra/interrupt.h>
__clib_export void
clib_interrupt_init (void **data, u32 n_int)
{
clib_interrupt_header_t *h;
const u32 bits_in_cl = 8 << CLIB_LOG2_CACHE_LINE_BYTES;
u32 sz = sizeof (clib_interrupt_header_t);
u32 n_cl = round_pow2 (n_int, bits_in_cl) / bits_in_cl;
sz += 2 * n_cl * CLIB_CACHE_LINE_BYTES;
h = data[0] = clib_mem_alloc_aligned (sz, CLIB_CACHE_LINE_BYTES);
clib_memset (data[0], 0, sz);
h->n_int = n_int;
h->uwords_allocated = n_cl * bits_in_cl / uword_bits;
h->uwords_used = round_pow2 (n_int, uword_bits) / uword_bits;
h->local = (uword *) (h + 1);
h->remote = h->local + h->uwords_allocated;
}
__clib_export void
clib_interrupt_resize (void **data, u32 n_int)
{
clib_interrupt_header_t *h = data[0];
u32 new_n_uwords, i;
if (data[0] == 0)
{
clib_interrupt_init (data, n_int);
return;
}
if (n_int == h->n_int)
return;
new_n_uwords = round_pow2 (n_int, uword_bits) / uword_bits;
if (new_n_uwords > h->uwords_allocated)
{
clib_interrupt_header_t *nh;
clib_interrupt_init ((void **) &nh, n_int);
for (int i = 0; i < h->uwords_used; i++)
nh->local[i] = h->local[i] | h->remote[i];
clib_mem_free (data[0]);
data[0] = nh;
return;
}
h->n_int = n_int;
h->uwords_used = new_n_uwords;
for (i = 0; i < new_n_uwords; i++)
h->local[i] |= h->remote[i];
for (i = 0; i < h->uwords_allocated; i++)
h->remote[i] = 0;
for (i = new_n_uwords; i < h->uwords_allocated; i++)
h->local[i] = 0;
n_int &= pow2_mask (log2_uword_bits);
if (n_int)
h->local[n_int >> log2_uword_bits] &= pow2_mask (n_int);
}
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