/*      $NetBSD: ka410.c,v 1.34 2017/05/22 16:46:15 ragge Exp $ */
/*
 * Copyright (c) 1996 Ludd, University of Lule}, Sweden.
 * All rights reserved.
 *
 * This code is derived from software contributed to Ludd by Bertram Barth.
 *
 * 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 AUTHOR ``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 AUTHOR 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: ka410.c,v 1.34 2017/05/22 16:46:15 ragge Exp $");

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

#include <machine/sid.h>
#include <machine/nexus.h>
#include <machine/ka410.h>
#include <machine/ka420.h>
#include <machine/clock.h>
#include <machine/vsbus.h>

static  void    ka410_conf(void);
static  void    ka410_memerr(void);
static  int     ka410_mchk(void *);
static  void    ka410_halt(void);
static  void    ka410_reboot(int);
static  void    ka41_cache_enable(void);
static  void    ka410_clrf(void);

static  const char * const ka410_devs[] = { "cpu", "vsbus", NULL };

static  void *  l2cache;        /* mapped in address */
static  long    *cacr;          /* l2csche ctlr reg */

/* 
 * Declaration of 410-specific calls.
 */
const struct cpu_dep ka410_calls = {
        .cpu_mchk       = ka410_mchk,
        .cpu_memerr     = ka410_memerr, 
        .cpu_conf       = ka410_conf,
        .cpu_gettime    = chip_gettime,
        .cpu_settime    = chip_settime,
        .cpu_vups       = 1,    /* ~VUPS */
        .cpu_scbsz      = 2,    /* SCB pages */
        .cpu_halt       = ka410_halt,
        .cpu_reboot     = ka410_reboot,
        .cpu_clrf       = ka410_clrf,
        .cpu_devs       = ka410_devs,
        .cpu_flags      = CPU_RAISEIPL,
};


void
ka410_conf(void)
{
        struct cpu_info * const ci = curcpu();
        struct vs_cpu *ka410_cpu;

        ka410_cpu = (struct vs_cpu *)vax_map_physmem(VS_REGS, 1);

        switch (vax_cputype) {
        case VAX_TYP_UV2:
                ka410_cpu->vc_410mser = 1;
                ci->ci_cpustr = "KA410, UV2";
                break;

        case VAX_TYP_CVAX:
                ka410_cpu->vc_vdcorg = 0; /* XXX */
                ka410_cpu->vc_parctl = PARCTL_CPEN | PARCTL_DPEN ;
mtpr(KA420_CADR_S2E|KA420_CADR_S1E|KA420_CADR_ISE|KA420_CADR_DSE, PR_CADR);
                if (vax_confdata & KA420_CFG_CACHPR) {
                        l2cache = (void *)vax_map_physmem(KA420_CH2_BASE,
                            (KA420_CH2_SIZE / VAX_NBPG));
                        cacr = (void *)vax_map_physmem(KA420_CACR, 1);
                        ka41_cache_enable();
                        ci->ci_cpustr =
                            "KA420, CVAX, 1KB L1 cache, 64KB L2 cache";
                } else {
                        ci->ci_cpustr = "KA420, CVAX, 1KB L1 cache";
                }
        }
        /* Done with ka410_cpu - release it */
        vax_unmap_physmem((vaddr_t)ka410_cpu, 1);
        /*
         * Setup parameters necessary to read time from clock chip.
         */
        clk_adrshift = 1;       /* Addressed at long's... */
        clk_tweak = 2;          /* ...and shift two */
        clk_page = (short *)vax_map_physmem(KA420_WAT_BASE, 1);
}

void
ka41_cache_enable(void)
{
        *cacr = KA420_CACR_TPE;         /* Clear any error, disable cache */
        memset(l2cache, 0, KA420_CH2_SIZE); /* Clear whole cache */
        *cacr = KA420_CACR_CEN;         /* Enable cache */
}

void
ka410_memerr(void)
{
        printf("Memory err!\n");
}

int
ka410_mchk(void *addr)
{
        panic("Machine check");
        return 0;
}

static void
ka410_halt(void)
{
        __asm("movl $0xc, (%0)"::"r"((int)clk_page + 0x38)); /* Don't ask */
        __asm("halt");
}

static void
ka410_reboot(int arg)
{
        __asm("movl $0xc, (%0)"::"r"((int)clk_page + 0x38)); /* Don't ask */
        __asm("halt");
}

static void
ka410_clrf(void)
{
        volatile struct ka410_clock *clk = (volatile void *)clk_page;

        /*
         * Clear restart and boot in progress flags
         * in the CPMBX. (ie. clear bits 4 and 5)
         */
        clk->cpmbx = (clk->cpmbx & ~0x30);
}