/*      $NetBSD: uba_mainbus.c,v 1.14 2017/05/22 17:15:45 ragge Exp $      */
/*
* Copyright (c) 1982, 1986 The Regents of the University of California.
* 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. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
*      @(#)uba.c       7.10 (Berkeley) 12/16/90
*      @(#)autoconf.c  7.20 (Berkeley) 5/9/91
*/

/*
* Copyright (c) 1996 Jonathan Stone.
* Copyright (c) 1994, 1996 Ludd, University of Lule}, Sweden.
*
* 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 REGENTS 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 REGENTS 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.
*
*      @(#)uba.c       7.10 (Berkeley) 12/16/90
*      @(#)autoconf.c  7.20 (Berkeley) 5/9/91
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: uba_mainbus.c,v 1.14 2017/05/22 17:15:45 ragge Exp $");

#define _VAX_BUS_DMA_PRIVATE

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

#include <machine/nexus.h>
#include <machine/sgmap.h>
#include <machine/mainbus.h>

#include <dev/qbus/ubavar.h>

#include <vax/uba/uba_common.h>

#include "ioconf.h"

/* Some Qbus-specific defines */
#define QBASIZE (8192 * VAX_NBPG)
#define QBAMAP  0x20088000
#define QBAMEM  0x30000000
#define QIOPAGE 0x20000000

/*
* The Q22 bus is the main IO bus on MicroVAX II/MicroVAX III systems.
* It has an address space of 4MB (22 address bits), therefore the name,
* and is hardware compatible with all 16 and 18 bits Q-bus devices.
*/
static  int     qba_match(device_t, cfdata_t, void *);
static  void    qba_attach(device_t, device_t, void *);
static  void    qba_beforescan(struct uba_softc*);
static  void    qba_init(struct uba_softc*);

CFATTACH_DECL_NEW(uba_mainbus, sizeof(struct uba_vsoftc),
   qba_match, qba_attach, NULL, NULL);

extern  struct vax_bus_space vax_mem_bus_space;

int
qba_match(device_t parent, cfdata_t cf, void *aux)
{
       struct mainbus_attach_args * const ma = aux;

       return !strcmp(uba_cd.cd_name, ma->ma_type);
}

void
qba_attach(device_t parent, device_t self, void *aux)
{
       struct mainbus_attach_args * const ma = aux;
       struct uba_vsoftc * const sc = device_private(self);
       paddr_t paddr;
       vaddr_t vaddr;
       int *mapp;
       int pgnum;
       //int val;
       int start;

       aprint_normal(": Q22\n");

       sc->uv_sc.uh_dev = self;
       /*
        * Fill in bus specific data.
        */
       sc->uv_sc.uh_beforescan = qba_beforescan;
       sc->uv_sc.uh_ubainit = qba_init;
       sc->uv_sc.uh_iot = ma->ma_iot;
       sc->uv_sc.uh_dmat = &sc->uv_dmat;

       /*
        * Fill in variables used by the sgmap system.
        */
       sc->uv_size = QBASIZE;  /* Size in bytes of Qbus space */
       sc->uv_addr = QBAMAP;   /* Physical address of map registers */

       uba_dma_init(sc);

       mapp = (int *)vax_map_physmem(QBAMAP, QBASIZE/VAX_NBPG);
       //val = 0;

       for (paddr = QBAMEM, pgnum = 0, start = -1;
            paddr < QBAMEM + QBASIZE - 8192;
            paddr += VAX_NBPG, pgnum += 1) {
               //val = mapp[pgnum];
               mapp[pgnum] = 0;
               vaddr = vax_map_physmem(paddr, 1);
               if (badaddr((void *)vaddr, 2) == 0) {
                       if (start < 0)
                               start = pgnum;
               } else if (start >= 0) {
                       aprint_normal("sgmap exclusion at %#x - %#x\n",
                           start*VAX_NBPG, pgnum*VAX_NBPG - 1);
                       vax_sgmap_reserve(start*VAX_NBPG,
                           (pgnum - start)*VAX_NBPG, &sc->uv_sgmap);
                       start = -1;
               }
               vax_unmap_physmem(vaddr, 1);
               //mapp[pgnum] = val;
       }
       vax_unmap_physmem((vaddr_t)mapp, QBASIZE/VAX_NBPG);
       if (start >= 0) {
               aprint_normal("sgmap exclusion at %#x - %#x\n",
                   start*VAX_NBPG, pgnum*VAX_NBPG - 1);
               vax_sgmap_reserve(start*VAX_NBPG, (pgnum - start)*VAX_NBPG,
                   &sc->uv_sgmap);
       }

       /* reserve I/O space within Qbus */
       vax_sgmap_reserve(0x3fe000, 0x400000 - 0x3fe000, &sc->uv_sgmap);

       uba_attach(&sc->uv_sc, QIOPAGE);
}

/*
* Called when the QBA is set up; to enable DMA access from
* QBA devices to main memory.
*/
void
qba_beforescan(struct uba_softc *sc)
{
#define QIPCR   0x1f40
#define Q_LMEAE 0x20
       bus_space_write_2(sc->uh_iot, sc->uh_ioh, QIPCR, Q_LMEAE);
}

void
qba_init(struct uba_softc *sc)
{
       mtpr(0, PR_IUR);
       DELAY(500000);
       qba_beforescan(sc);
}

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