/*      $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);
}

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