/*      $NetBSD: cpunode.c,v 1.8 2021/08/07 16:19:02 thorpej Exp $      */
/*-
 * Copyright (c) 2010, 2011 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Raytheon BBN Technologies Corp and Defense Advanced Research Projects
 * Agency and which was developed by Matt Thomas of 3am Software Foundry.
 *
 * This material is based upon work supported by the Defense Advanced Research
 * Projects Agency and Space and Naval Warfare Systems Center, Pacific, under
 * Contract No. N66001-09-C-2073.
 * Approved for Public Release, Distribution Unlimited
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: cpunode.c,v 1.8 2021/08/07 16:19:02 thorpej Exp $");

#include "ioconf.h"

#include <sys/param.h>
#include <sys/device.h>
#include <sys/cpu.h>

#include <powerpc/booke/cpuvar.h>

static int cpunode_match(device_t, cfdata_t, void *);
static void cpunode_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(cpunode, sizeof(struct cpunode_softc),
    cpunode_match, cpunode_attach, NULL, NULL);

static u_int nodes;

static int
cpunode_match(device_t parent, cfdata_t cf, void *aux)
{
        struct mainbus_attach_args * const ma = aux;
        if (strcmp(ma->ma_name, cpunode_cd.cd_name) != 0)
                return 0;

        if (ma->ma_node > 8 || (nodes & (1 << ma->ma_node)))
                return 0;

        return 1;
}

static int
cpunode_print(void *aux, const char *pnp)
{
        struct cpunode_attach_args *cna = aux;

        if (pnp)
#if 0
                return QUIET;
#else
                aprint_normal("%s at %s", cna->cna_locs.cnl_name, pnp);
#endif

        if (cna->cna_locs.cnl_instance != 0)
                aprint_normal(" instance %d", cna->cna_locs.cnl_instance);

        return UNCONF;
}

static void
cpunode_attach(device_t parent, device_t self, void *aux)
{
        const struct cpunode_locators *cnl = cpu_md_ops.md_cpunode_locs;
        struct cpunode_softc * const sc = device_private(self);
        struct mainbus_attach_args * const ma = aux;
        struct cpunode_attach_args cna;

        sc->sc_dev = self;

        aprint_normal("\n");
        aprint_normal_dev(self,
            "%"PRIu64"KB/%"PRIu64"B %"PRIu64"-banked %"PRIu64"-way unified L2 cache\n",
            board_info_get_number("l2-cache-size") / 1024,
            board_info_get_number("l2-cache-line-size"),
            board_info_get_number("l2-cache-banks"),
            board_info_get_number("l2-cache-ways"));

        nodes |= 1 << ma->ma_node;

        const uint16_t my_id = board_info_get_number("my-id");

        for (u_int childmask = 1; cnl->cnl_name != NULL; cnl++) {
                bool inclusive = true;
                bool found = (cnl->cnl_ids[0] == 0);

#if DEBUG > 1
                aprint_normal_dev(self, "dev=%s[%u], addr=%x@%x",
                    cnl->cnl_name, cnl->cnl_instance, cnl->cnl_size,
                    cnl->cnl_addr);
                if (cnl->cnl_nintr > 0) {
                        aprint_normal(", intrs=%u", cnl->cnl_intrs[0]);
                        for (u_int i = 1; i < cnl->cnl_nintr; i++)
                                aprint_normal(",%u", cnl->cnl_intrs[i]);
                }
                aprint_normal("\n");
#endif

                for (u_int i = 0;
                     !found
                     && i < __arraycount(cnl->cnl_ids)
                     && cnl->cnl_ids[i] != 0;
                     i++) {
                        if (cnl->cnl_ids[i] == 0xffff) {
                                inclusive = false;
                                continue;
                        }
                        found = (cnl->cnl_ids[i] == my_id);
                }
                /*
                 * found & inclusive == match
                 * !found & !inclusive == match
                 * found & !inclusive == no match
                 * !found & inclusive == no match
                 * therefore
                 * found ^ inclusive = no match
                 * so
                 * !(found ^ inclusive) = match
                 */
                if (found ^ inclusive)
                        continue;

                cna.cna_busname = "cpunode";
                cna.cna_memt = ma->ma_memt;
                cna.cna_le_memt = ma->ma_le_memt;
                cna.cna_dmat = ma->ma_dmat;
                cna.cna_childmask = childmask;
                cna.cna_locs = *cnl;

                config_found(self, &cna, cpunode_print,
                    CFARGS(.iattr = "cpunode"));
                childmask <<= 1;
        }
        /*
         * Anything MD left to do?
         */
        if (cpu_md_ops.md_cpunode_attach != NULL)
                (*cpu_md_ops.md_cpunode_attach)(parent, self, aux);
}

static int cpu_match(device_t, cfdata_t, void *);
static void cpu_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(cpu, 0,
    cpu_match, cpu_attach, NULL, NULL);

static int
cpu_match(device_t parent, cfdata_t cf, void *aux)
{
        struct cpunode_softc * const psc = device_private(parent);
        struct cpunode_attach_args * const cna = aux;

        if (strcmp(cna->cna_locs.cnl_name, cpu_cd.cd_name) != 0)
                return 0;

        if (psc->sc_children & cna->cna_childmask)
                return 0;

        return 1;
}

static void
cpu_attach(device_t parent, device_t self, void *aux)
{
        struct cpunode_softc * const psc = device_private(parent);
        struct cpunode_attach_args * const cna = aux;

        psc->sc_children |= cna->cna_childmask;

        aprint_normal("\n");

        (*cpu_md_ops.md_cpu_attach)(self, cna->cna_locs.cnl_instance);
}