/*      $NetBSD: machdep.c,v 1.3 2021/09/19 11:37:00 andvar Exp $       */

/*
* Taken from src/sys/arch/evbppc/walnut/machdep.c:
*      NetBSD: machdep.c,v 1.67 2021/03/30 05:08:16 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 1.3 2021/09/19 11:37:00 andvar Exp $");

#include "opt_ddb.h"
#include "opt_pci.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/dht.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 "com.h"
#if NCOM > 0
#include <sys/termios.h>
#include <dev/ic/comreg.h>
#include <dev/ic/comvar.h>
#include <powerpc/ibm4xx/dev/comopbvar.h>
#ifndef CONADDR
#define CONADDR         IBM405GP_UART0_BASE
#endif
#ifndef CONSPEED
#define CONSPEED        B115200
#endif
#ifndef CONMODE
#define CONMODE         TTYDEF_CFLAG
#endif
#endif /* NCOM > 0 */

#include "emac.h"
#if NEMAC > 0
#include <net/if_ether.h>
#endif

#include "pci.h"
#if NPCI > 0
#ifndef PCI_NETBSD_CONFIGURE
#error options PCI_NETBSD_CONFIGURE is mandatory.
#endif
#include <powerpc/ibm4xx/pci_machdep.h>
#include <dev/pci/pciconf.h>
#include <dev/pci/pcivar.h>
#endif

#define TLB_PG_SIZE     (16 * 1024 * 1024)

static u_int memsize;

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

/*
* Get memory size from SDRAM bank register.
*/
static u_int
dht_memsize(void)
{
       u_int total = 0;
       uint32_t val, addr;

       for (addr = DCR_SDRAM0_B0CR; addr <= DCR_SDRAM0_B3CR; addr += 4) {
               mtdcr(DCR_SDRAM0_CFGADDR, addr);
               val = mfdcr(DCR_SDRAM0_CFGDATA);
               if (val & SDRAM0_BnCR_EN)
                       total += SDRAM0_BnCR_SZ(val);
       }
       return total;
}

void
consinit(void)
{

#if NCOM > 0
       com_opb_cnattach(DHT_COM_FREQ, CONADDR, CONSPEED, CONMODE);
#endif
}

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

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

       memsize = dht_memsize();

       /* 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);

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

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

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

void
cpu_startup(void)
{
       prop_number_t pn;

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

       /*
        * Set up the board properties database.
        */
       board_info_init();

       pn = prop_number_create_integer(DHT_CPU_FREQ);
       KASSERT(pn != NULL);
       if (prop_dictionary_set(board_properties, "processor-frequency", pn) ==
           false)
               panic("setting processor-frequency");
       prop_object_release(pn);

       pn = prop_number_create_integer(memsize);
       KASSERT(pn != NULL);
       if (prop_dictionary_set(board_properties, "mem-size", pn) == false)
               panic("setting mem-size");
       prop_object_release(pn);

#if NEMAC > 0
       /*
        * XXX
        * Unfortunately, no MAC address is assigned to this board.
        * Set fake address de:ad:be:ef:00:00.
        *
        * XXX
        * This should be same with what U-Boot/PPC-Boot set.
        */
       static uint8_t enaddr[ETHER_ADDR_LEN];
       enaddr[0] = 0xde; enaddr[1] = 0xad; enaddr[2] = 0xbe;
       enaddr[3] = 0xef; enaddr[4] = 0x00; enaddr[5] = 0x00;
       prop_data_t pd = prop_data_create_data_nocopy(enaddr, ETHER_ADDR_LEN);
       KASSERT(pd != NULL);
       if (prop_dictionary_set(board_properties, "emac0-mac-addr", pd) ==
           false)
               panic("setting emac0-mac-addr");
       prop_object_release(pd);
#endif

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

       /*
        * No fake mapiodev.
        */
       fake_mapiodev = 0;
}

#if NPCI > 0
int
ibm4xx_pci_bus_maxdevs(void *v, int busno)
{

       return 32;
}

/*
* This is only possible mapping known to work b/w PCI devices and IRQ pins.
*/
#define DEV_TO_IRQ(dev)         (27 + (dev))
#define PARENT_DEV(swiz, dev)   ((swiz) - (dev))

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

       if (pin <= 0 || pin > 4)
               goto bad;

       if (bus != 0) {
               /*
                * XXX
                * We only support ppb(4) directly attached to pci0.
                */
               dev = PARENT_DEV(pa->pa_intrswiz, dev);
               goto out;
       }

       switch (dev) {
       case 2:
       case 3:
       case 4:
out:
               *ihp = DEV_TO_IRQ(dev);
               return 0;
       default:
bad:
               printf("%s: invalid request: bus %d dev %d pin %d\n",
                   __func__, bus, dev, pin);
               *ihp = -1;
               return 1;
       }
}

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

       if (bus != 0) {
               /*
                * XXX
                * See comment above.
                */
               dev = PARENT_DEV(swiz, dev);
               goto out;
       }

       switch (dev) {
       case 2:
       case 3:
       case 4:
out:
               *iline = DEV_TO_IRQ(dev);
               break;
       default:
               printf("%s: invalid request: bus %d dev %d pin %d swiz %d\n",
                   __func__, bus, dev, pin, swiz);
               *iline = 0;
               break;
       }
}
#endif /* NPCI > 0 */

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