FreeBSD/Linux Kernel Cross Reference
sys/dev/ofw/openfirm.c

     /*      $NetBSD: Locore.c,v 1.7 2000/08/20 07:04:59 tsubai 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.
     */
    /*-
     * Copyright (C) 2000 Benno Rice.
     * 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.
     *
     * THIS SOFTWARE IS PROVIDED BY Benno Rice ``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>
    __FBSDID("$FreeBSD: releng/8.1/sys/dev/ofw/openfirm.c 194138 2009-06-14 00:05:38Z marius $");
    
    #include <sys/param.h>
    #include <sys/kernel.h>
    #include <sys/malloc.h>
    #include <sys/systm.h>
    
    #include <machine/stdarg.h>
    
    #include <dev/ofw/ofwvar.h>
    #include <dev/ofw/openfirm.h>
    
    #include "ofw_if.h"
    
    MALLOC_DEFINE(M_OFWPROP, "openfirm", "Open Firmware properties");
    
    static ihandle_t stdout;
    
    static ofw_def_t        *ofw_def_impl;
    static ofw_t            ofw_obj;
    static struct ofw_kobj  ofw_kernel_obj;
    static struct kobj_ops  ofw_kernel_kops;
    
    /*
     * OFW install routines. Highest priority wins, equal priority also
     * overrides allowing last-set to win.
     */
    SET_DECLARE(ofw_set, ofw_def_t);
    
    boolean_t
    OF_install(char *name, int prio)
    {
            ofw_def_t *ofwp, **ofwpp;
            static int curr_prio = 0;
    
            /*
             * Try and locate the OFW kobj corresponding to the name.
             */
            SET_FOREACH(ofwpp, ofw_set) {
                    ofwp = *ofwpp;
    
                   if (ofwp->name &&
                       !strcmp(ofwp->name, name) &&
                       prio >= curr_prio) {
                           curr_prio = prio;
                           ofw_def_impl = ofwp;
                           return (TRUE);
                   }
           }
   
           return (FALSE);
   }
   
   /* Initializer */
   void
   OF_init(void *cookie)
   {
           phandle_t chosen;
   
           ofw_obj = &ofw_kernel_obj;
           /*
            * Take care of compiling the selected class, and
            * then statically initialize the OFW object.
            */
           kobj_class_compile_static(ofw_def_impl, &ofw_kernel_kops);
           kobj_init((kobj_t)ofw_obj, ofw_def_impl);
   
           OFW_INIT(ofw_obj, cookie);
   
           if ((chosen = OF_finddevice("/chosen")) == -1)
                   OF_exit();
           if (OF_getprop(chosen, "stdout", &stdout, sizeof(stdout)) == -1)
                   stdout = -1;
   }
   
   void
   OF_printf(const char *fmt, ...)
   {
           va_list va;
           char buf[1024];
   
           va_start(va, fmt);
           vsprintf(buf, fmt, va);
           OF_write(stdout, buf, strlen(buf));
           va_end(va);
   }
   
   /*
    * Generic functions
    */
   
   /* Test to see if a service exists. */
   int
   OF_test(const char *name)
   {
   
           return (OFW_TEST(ofw_obj, name));
   }
   
   int
   OF_interpret(const char *cmd, int nreturns, ...)
   {
           va_list ap;
           unsigned long slots[16];
           int i = 0;
           int status;
   
           status = OFW_INTERPRET(ofw_obj, cmd, nreturns, slots);
           if (status == -1)
                   return (status);
   
           va_start(ap, nreturns);
           while (i < nreturns)
                   *va_arg(ap, cell_t *) = slots[i++];
           va_end(ap);
   
           return (status);
   }
   
   /*
    * Device tree functions
    */
   
   /* Return the next sibling of this node or 0. */
   phandle_t
   OF_peer(phandle_t node)
   {
   
           return (OFW_PEER(ofw_obj, node));
   }
   
   /* Return the first child of this node or 0. */
   phandle_t
   OF_child(phandle_t node)
   {
   
           return (OFW_CHILD(ofw_obj, node));
   }
   
   /* Return the parent of this node or 0. */
   phandle_t
   OF_parent(phandle_t node)
   {
   
           return (OFW_PARENT(ofw_obj, node));
   }
   
   /* Return the package handle that corresponds to an instance handle. */
   phandle_t
   OF_instance_to_package(ihandle_t instance)
   {
   
           return (OFW_INSTANCE_TO_PACKAGE(ofw_obj, instance));
   }
   
   /* Get the length of a property of a package. */
   ssize_t
   OF_getproplen(phandle_t package, const char *propname)
   {
   
           return (OFW_GETPROPLEN(ofw_obj, package, propname));
   }
   
   /* Get the value of a property of a package. */
   ssize_t
   OF_getprop(phandle_t package, const char *propname, void *buf, size_t buflen)
   {
   
           return (OFW_GETPROP(ofw_obj, package, propname, buf, buflen));
   }
   
   /*
    * Resursively search the node and its parent for the given property, working
    * downward from the node to the device tree root.  Returns the value of the
    * first match.
    */
   ssize_t
   OF_searchprop(phandle_t node, const char *propname, void *buf, size_t len)
   {
           ssize_t rv;
   
           for (; node != 0; node = OF_parent(node))
                   if ((rv = OF_getprop(node, propname, buf, len)) != -1)
                           return (rv);
           return (-1);
   }
   
   /*
    * Store the value of a property of a package into newly allocated memory
    * (using the M_OFWPROP malloc pool and M_WAITOK).  elsz is the size of a
    * single element, the number of elements is return in number.
    */
   ssize_t
   OF_getprop_alloc(phandle_t package, const char *propname, int elsz, void **buf)
   {
           int len;
   
           *buf = NULL;
           if ((len = OF_getproplen(package, propname)) == -1 ||
               len % elsz != 0)
                   return (-1);
   
           *buf = malloc(len, M_OFWPROP, M_WAITOK);
           if (OF_getprop(package, propname, *buf, len) == -1) {
                   free(*buf, M_OFWPROP);
                   *buf = NULL;
                   return (-1);
           }
           return (len / elsz);
   }
   
   /* Get the next property of a package. */
   int
   OF_nextprop(phandle_t package, const char *previous, char *buf, size_t size)
   {
   
           return (OFW_NEXTPROP(ofw_obj, package, previous, buf, size));
   }
   
   /* Set the value of a property of a package. */
   int
   OF_setprop(phandle_t package, const char *propname, const void *buf, size_t len)
   {
   
           return (OFW_SETPROP(ofw_obj, package, propname, buf,len));
   }
   
   /* Convert a device specifier to a fully qualified pathname. */
   ssize_t
   OF_canon(const char *device, char *buf, size_t len)
   {
   
           return (OFW_CANON(ofw_obj, device, buf, len));
   }
   
   /* Return a package handle for the specified device. */
   phandle_t
   OF_finddevice(const char *device)
   {
   
           return (OFW_FINDDEVICE(ofw_obj, device));
   }
   
   /* Return the fully qualified pathname corresponding to an instance. */
   ssize_t
   OF_instance_to_path(ihandle_t instance, char *buf, size_t len)
   {
   
           return (OFW_INSTANCE_TO_PATH(ofw_obj, instance, buf, len));
   }
   
   /* Return the fully qualified pathname corresponding to a package. */
   ssize_t
   OF_package_to_path(phandle_t package, char *buf, size_t len)
   {
   
           return (OFW_PACKAGE_TO_PATH(ofw_obj, package, buf, len));
   }
   
   /*  Call the method in the scope of a given instance. */
   int
   OF_call_method(const char *method, ihandle_t instance, int nargs, int nreturns,
       ...)
   {
           va_list ap;
           unsigned long args_n_results[12];
           int n, status;
   
           if (nargs > 6)
                   return (-1);
           va_start(ap, nreturns);
           for (n = 0; n < nargs; n++)
                   args_n_results[n] = va_arg(ap, unsigned long);
   
           status = OFW_CALL_METHOD(ofw_obj, instance, method, nargs, nreturns,
               args_n_results);
           if (status != 0)
                   return (status);
   
           for (; n < nargs + nreturns; n++)
                   *va_arg(ap, unsigned long *) = args_n_results[n];
           va_end(ap);
           return (0);
   }
   
   /*
    * Device I/O functions
    */
   
   /* Open an instance for a device. */
   ihandle_t
   OF_open(const char *device)
   {
   
           return (OFW_OPEN(ofw_obj, device));
   }
   
   /* Close an instance. */
   void
   OF_close(ihandle_t instance)
   {
   
           OFW_CLOSE(ofw_obj, instance);
   }
   
   /* Read from an instance. */
   ssize_t
   OF_read(ihandle_t instance, void *addr, size_t len)
   {
   
           return (OFW_READ(ofw_obj, instance, addr, len));
   }
   
   /* Write to an instance. */
   ssize_t
   OF_write(ihandle_t instance, const void *addr, size_t len)
   {
   
           return (OFW_WRITE(ofw_obj, instance, addr, len));
   }
   
   /* Seek to a position. */
   int
   OF_seek(ihandle_t instance, uint64_t pos)
   {
   
           return (OFW_SEEK(ofw_obj, instance, pos));
   }
   
   /*
    * Memory functions
    */
   
   /* Claim an area of memory. */
   void *
   OF_claim(void *virt, size_t size, u_int align)
   {
   
           return (OFW_CLAIM(ofw_obj, virt, size, align));
   }
   
   /* Release an area of memory. */
   void
   OF_release(void *virt, size_t size)
   {
   
           OFW_RELEASE(ofw_obj, virt, size);
   }
   
   /*
    * Control transfer functions
    */
   
   /* Suspend and drop back to the Open Firmware interface. */
   void
   OF_enter()
   {
   
           OFW_ENTER(ofw_obj);
   }
   
   /* Shut down and drop back to the Open Firmware interface. */
   void
   OF_exit()
   {
   
           /* Should not return */
           OFW_EXIT(ofw_obj);
   
           for (;;)                        /* just in case */
                   ;
   }

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