/*      $NetBSD: machdep.c,v 1.68 2021/08/03 09:25:44 rin Exp $ */

/*
* Copyright 2001, 2002 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Eduardo Horvath and Simon Burge for Wasabi Systems, Inc.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed for the NetBSD Project by
*      Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
*    or promote products derived from this software without specific prior
*    written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* 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.
*/

/*
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
* Copyright (C) 1995, 1996 TooLs GmbH.
* All rights reserved.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
*    derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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: machdep.c,v 1.68 2021/08/03 09:25:44 rin Exp $");

#include "opt_ddb.h"

#include <sys/param.h>
#include <sys/bus.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/reboot.h>
#include <sys/systm.h>

#include <machine/walnut.h>

#include <powerpc/spr.h>
#include <powerpc/ibm4xx/spr.h>

#include <powerpc/ibm4xx/cpu.h>
#include <powerpc/ibm4xx/dcr4xx.h>
#include <powerpc/ibm4xx/ibm405gp.h>
#include <powerpc/ibm4xx/openbios.h>
#include <powerpc/ibm4xx/tlb.h>

#include <powerpc/ibm4xx/pci_machdep.h>
#include <dev/pci/pciconf.h>
#include <dev/pci/pcivar.h>

#define TLB_PG_SIZE     (16*1024*1024)

void initppc(vaddr_t, vaddr_t, char *, void *);

void
initppc(vaddr_t startkernel, vaddr_t endkernel, char *args, void *info_block)
{
       u_int memsize;

       /* Disable all external interrupts */
       mtdcr(DCR_UIC0_BASE + DCR_UIC_ER, 0);

       /* Setup board from OpenBIOS */
       openbios_board_init(info_block);
       memsize = openbios_board_memsize_get();

       /* Linear map kernel memory */
       for (vaddr_t va = 0; va < endkernel; va += TLB_PG_SIZE) {
               ppc4xx_tlb_reserve(va, va, TLB_PG_SIZE, TLB_EX);
       }

       /* Map console after physmem (see pmap_tlbmiss()) */
       ppc4xx_tlb_reserve(IBM405GP_UART0_BASE, roundup(memsize, TLB_PG_SIZE),
           TLB_PG_SIZE, TLB_I | TLB_G);

       mtspr(SPR_TCR, 0);      /* disable all timers */

       ibm40x_memsize_init(memsize, startkernel);
       ibm4xx_init(startkernel, endkernel, pic_ext_intr);

#ifdef DEBUG
       openbios_board_print();
#endif

#ifdef DDB
       if (boothowto & RB_KDB)
               Debugger();
#endif
}

/*
* Machine dependent startup code.
*/

void
cpu_startup(void)
{

       ibm4xx_cpu_startup("Walnut PowerPC 405GP Evaluation Board");

       openbios_board_info_set();

       /*
        * Now that we have VM, malloc()s are OK in bus_space.
        */
       bus_space_mallocok();
       fake_mapiodev = 0;
}

int
ibm4xx_pci_bus_maxdevs(void *v, int busno)
{

       /*
        * Bus number is irrelevant.  Configuration Mechanism 1 is in
        * use, can have devices 0-32 (i.e. the `normal' range).
        */
       return 5;
}

int
ibm4xx_pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp)
{
       int pin = pa->pa_intrpin;
       int dev = pa->pa_device;

       if (pin == 0)
               /* No IRQ used. */
               goto bad;

       if (pin > 4) {
               printf("%s: bad interrupt pin %d\n", __func__, pin);
               goto bad;
       }

       /*
        * We need to map the interrupt pin to the interrupt bit in the UIC
        * associated with it.  This is highly machine-dependent.
        */
       switch(dev) {
       case 1:
       case 2:
       case 3:
       case 4:
               *ihp = 27 + dev;
               break;
       default:
               printf("Hmm.. PCI device %d should not exist on this board\n",
                       dev);
               goto bad;
       }
       return 0;

bad:
       *ihp = -1;
       return 1;
}

void
ibm4xx_pci_conf_interrupt(void *v, int bus, int dev, int pin, int swiz,
   int *iline)
{

       if (bus == 0) {
               switch(dev) {
               case 1:
               case 2:
               case 3:
               case 4:
                       *iline = 31 - dev;
               }
       } else
               *iline = 20 + ((swiz + dev + 1) & 3);
}

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