/*      $OpenBSD: opendev.c,v 1.11 2024/11/07 15:40:02 miod Exp $       */
/*      $NetBSD: openfirm.c,v 1.1 1996/09/30 16:34:52 ws Exp $  */

/*
 * 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/param.h>
#include <sys/systm.h>
#include <sys/stdarg.h>
#include <machine/cpu.h>
#include <machine/psl.h>

#include <dev/ofw/openfirm.h>
#include "ofw_machdep.h"

extern void ofbcopy(const void *, void *, size_t);

int
OF_instance_to_package(int ihandle)
{
        static struct {
                char *name;
                int nargs;
                int nreturns;
                int ihandle;
                int phandle;
        } args = {
                "instance-to-package",
                1,
                1,
        };
        uint32_t s;
        int ret;

        s = ofw_msr();
        args.ihandle = ihandle;
        if (openfirmware(&args) == -1)
                ret = -1;
        else
                ret = args.phandle;
        ppc_mtmsr(s);
        return ret;
}

int
OF_call_method(char *method, int ihandle, int nargs, int nreturns, ...)
{
        va_list ap;
        static struct {
                char *name;
                int nargs;
                int nreturns;
                char *method;
                int ihandle;
                int args_n_results[12];
        } args = {
                "call-method",
                2,
                1,
        };
        uint32_t s;
        int *ip, n, ret;

        if (nargs > 6)
                return -1;
        s = ofw_msr();
        args.nargs = nargs + 2;
        args.nreturns = nreturns + 1;
        args.method = method;
        args.ihandle = ihandle;
        va_start(ap, nreturns);
        for (ip = args.args_n_results + (n = nargs); --n >= 0;)
                *--ip = va_arg(ap, int);
        if (openfirmware(&args) == -1)
                ret = -1;
        else if (args.args_n_results[nargs])
                ret = args.args_n_results[nargs];
        else {
                for (ip = args.args_n_results + nargs + (n = args.nreturns);
                    --n > 0;)
                        *va_arg(ap, int *) = *--ip;
                ret = 0;
        }
        va_end(ap);
        ppc_mtmsr(s);
        return ret;
}
int
OF_call_method_1(char *method, int ihandle, int nargs, ...)
{
        va_list ap;
        static struct {
                char *name;
                int nargs;
                int nreturns;
                char *method;
                int ihandle;
                int args_n_results[8];
        } args = {
                "call-method",
                2,
                2,
        };
        uint32_t s;
        int *ip, n, ret;

        if (nargs > 6)
                return -1;
        s = ofw_msr();
        args.nargs = nargs + 2;
        args.method = method;
        args.ihandle = ihandle;
        va_start(ap, nargs);
        for (ip = args.args_n_results + (n = nargs); --n >= 0;)
                *--ip = va_arg(ap, int);
        va_end(ap);
        if (openfirmware(&args) == -1)
                ret = -1;
        else if (args.args_n_results[nargs])
                ret = -1;
        else
                ret = args.args_n_results[nargs + 1];
        ppc_mtmsr(s);
        return ret;
}

int
OF_open(char *dname)
{
        static struct {
                char *name;
                int nargs;
                int nreturns;
                char *dname;
                int handle;
        } args = {
                "open",
                1,
                1,
        };
        uint32_t s;
        int l, ret;

        if ((l = strlen(dname)) >= PAGE_SIZE)
                return -1;
        s = ofw_msr();
        ofbcopy(dname, OF_buf, l + 1);
        args.dname = OF_buf;
        if (openfirmware(&args) == -1)
                ret = -1;
        else
                ret = args.handle;
        ppc_mtmsr(s);
        return ret;
}

void
OF_close(int handle)
{
        static struct {
                char *name;
                int nargs;
                int nreturns;
                int handle;
        } args = {
                "close",
                1,
                0,
        };
        uint32_t s;

        s = ofw_msr();
        args.handle = handle;
        openfirmware(&args);
        ppc_mtmsr(s);
}

/*
 * This assumes that character devices don't read in multiples of PAGE_SIZE.
 */
int
OF_read(int handle, void *addr, int len)
{
        static struct {
                char *name;
                int nargs;
                int nreturns;
                int ihandle;
                void *addr;
                int len;
                int actual;
        } args = {
                "read",
                3,
                1,
        };
        uint32_t s;
        int act = 0, l, ret;

        s = ofw_msr();
        args.ihandle = handle;
        args.addr = OF_buf;
        for (; len > 0; len -= l, addr += l) {
                l = min(PAGE_SIZE, len);
                args.len = l;
                if (openfirmware(&args) == -1) {
                        ret = -1;
                        goto out;
                }
                if (args.actual > 0) {
                        ofbcopy(OF_buf, addr, args.actual);
                        act += args.actual;
                }
                if (args.actual < l) {
                        if (act)
                                ret = act;
                        else
                                ret = args.actual;
                        goto out;
                }
        }
        ret = act;
out:
        ppc_mtmsr(s);
        return ret;
}

int
OF_write(int handle, void *addr, int len)
{
        static struct {
                char *name;
                int nargs;
                int nreturns;
                int ihandle;
                void *addr;
                int len;
                int actual;
        } args = {
                "write",
                3,
                1,
        };
        uint32_t s;
        int act = 0, l, ret;

        s = ofw_msr();
        args.ihandle = handle;
        args.addr = OF_buf;
        for (; len > 0; len -= l, addr += l) {
                l = min(PAGE_SIZE, len);
                ofbcopy(addr, OF_buf, l);
                args.len = l;
                if (openfirmware(&args) == -1) {
                        ret = -1;
                        goto out;
                }
                l = args.actual;
                act += l;
        }
        ret = act;
out:
        ppc_mtmsr(s);
        return ret;
}

int
OF_seek(int handle, u_quad_t pos)
{
        static struct {
                char *name;
                int nargs;
                int nreturns;
                int handle;
                int poshi;
                int poslo;
                int status;
        } args = {
                "seek",
                3,
                1,
        };
        uint32_t s;
        int ret;

        s = ofw_msr();
        args.handle = handle;
        args.poshi = (int)(pos >> 32);
        args.poslo = (int)pos;
        if (openfirmware(&args) == -1)
                ret = -1;
        else
                ret = args.status;
        ppc_mtmsr(s);
        return ret;
}