Add an Open Firmware access module for real-mode OF accesses to the PowerPC
build. This is required for the IBM Mambo simulator, as well as a variety of non-Apple PowerPC hardware.
This commit is contained in:
Nathan Whitehorn
parent
dc8f21bc49
commit
8446b20662
@ -111,6 +111,7 @@ powerpc/mpc85xx/opic.c optional mpc85xx
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powerpc/mpc85xx/pci_ocp.c optional pci mpc85xx
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powerpc/ofw/ofw_pcibus.c optional pci aim
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powerpc/ofw/ofw_pcib_pci.c optional pci aim
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powerpc/ofw/ofw_real.c optional aim
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powerpc/ofw/ofw_syscons.c optional sc aim
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powerpc/powermac/ata_kauai.c optional powermac ata | powermac atamacio
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powerpc/powermac/ata_macio.c optional powermac ata | powermac atamacio
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922
sys/powerpc/ofw/ofw_real.c
Normal file
922
sys/powerpc/ofw/ofw_real.c
Normal file
@ -0,0 +1,922 @@
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/* $NetBSD: Locore.c,v 1.7 2000/08/20 07:04:59 tsubai Exp $ */
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/*-
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* Copyright (C) 1995, 1996 Wolfgang Solfrank.
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* Copyright (C) 1995, 1996 TooLs GmbH.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by TooLs GmbH.
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* 4. The name of TooLs GmbH may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* Copyright (C) 2000 Benno Rice.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/systm.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <machine/stdarg.h>
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#include <machine/bus.h>
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#include <machine/pmap.h>
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#include <machine/ofw_machdep.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/ofwvar.h>
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#include "ofw_if.h"
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static void ofw_real_init(ofw_t, void *openfirm);
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static int ofw_real_test(ofw_t, const char *name);
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static phandle_t ofw_real_peer(ofw_t, phandle_t node);
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static phandle_t ofw_real_child(ofw_t, phandle_t node);
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static phandle_t ofw_real_parent(ofw_t, phandle_t node);
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static phandle_t ofw_real_instance_to_package(ofw_t, ihandle_t instance);
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static ssize_t ofw_real_getproplen(ofw_t, phandle_t package,
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const char *propname);
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static ssize_t ofw_real_getprop(ofw_t, phandle_t package, const char *propname,
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void *buf, size_t buflen);
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static int ofw_real_nextprop(ofw_t, phandle_t package, const char *previous,
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char *buf, size_t);
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static int ofw_real_setprop(ofw_t, phandle_t package, char *propname,
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void *buf, size_t len);
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static ssize_t ofw_real_canon(ofw_t, const char *device, char *buf, size_t len);
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static phandle_t ofw_real_finddevice(ofw_t, const char *device);
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static ssize_t ofw_real_instance_to_path(ofw_t, ihandle_t instance, char *buf,
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size_t len);
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static ssize_t ofw_real_package_to_path(ofw_t, phandle_t package, char *buf,
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size_t len);
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static int ofw_real_call_method(ofw_t, ihandle_t instance, const char *method,
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int nargs, int nreturns, unsigned long *args_and_returns);
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static ihandle_t ofw_real_open(ofw_t, const char *device);
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static void ofw_real_close(ofw_t, ihandle_t instance);
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static ssize_t ofw_real_read(ofw_t, ihandle_t instance, void *addr, size_t len);
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static ssize_t ofw_real_write(ofw_t, ihandle_t instance, const void *addr,
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size_t len);
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static int ofw_real_seek(ofw_t, ihandle_t instance, u_int64_t pos);
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static caddr_t ofw_real_claim(ofw_t, void *virt, size_t size, u_int align);
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static void ofw_real_release(ofw_t, void *virt, size_t size);
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static void ofw_real_enter(ofw_t);
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static void ofw_real_exit(ofw_t);
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static ofw_method_t ofw_real_methods[] = {
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OFWMETHOD(ofw_init, ofw_real_init),
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OFWMETHOD(ofw_peer, ofw_real_peer),
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OFWMETHOD(ofw_child, ofw_real_child),
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OFWMETHOD(ofw_parent, ofw_real_parent),
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OFWMETHOD(ofw_instance_to_package, ofw_real_instance_to_package),
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OFWMETHOD(ofw_getproplen, ofw_real_getproplen),
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OFWMETHOD(ofw_getprop, ofw_real_getprop),
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OFWMETHOD(ofw_nextprop, ofw_real_nextprop),
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OFWMETHOD(ofw_setprop, ofw_real_setprop),
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OFWMETHOD(ofw_canon, ofw_real_canon),
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OFWMETHOD(ofw_finddevice, ofw_real_finddevice),
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OFWMETHOD(ofw_instance_to_path, ofw_real_instance_to_path),
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OFWMETHOD(ofw_package_to_path, ofw_real_package_to_path),
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OFWMETHOD(ofw_test, ofw_real_test),
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OFWMETHOD(ofw_call_method, ofw_real_call_method),
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OFWMETHOD(ofw_open, ofw_real_open),
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OFWMETHOD(ofw_close, ofw_real_close),
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OFWMETHOD(ofw_read, ofw_real_read),
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OFWMETHOD(ofw_write, ofw_real_write),
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OFWMETHOD(ofw_seek, ofw_real_seek),
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OFWMETHOD(ofw_claim, ofw_real_claim),
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OFWMETHOD(ofw_release, ofw_real_release),
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OFWMETHOD(ofw_enter, ofw_real_enter),
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OFWMETHOD(ofw_exit, ofw_real_exit),
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{ 0, 0 }
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};
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static ofw_def_t ofw_real = {
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OFW_STD_REAL,
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ofw_real_methods,
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0
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};
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OFW_DEF(ofw_real);
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MALLOC_DEFINE(M_OFWREAL, "ofwreal", "Open Firmware Real Mode Bounce Page");
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static int (*openfirmware)(void *);
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static vm_offset_t of_bounce_phys;
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static caddr_t of_bounce_virt;
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static off_t of_bounce_offset;
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static size_t of_bounce_size;
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static struct mtx of_bounce_mtx;
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/*
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* After the VM is up, allocate a wired, low memory bounce page.
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*/
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static void ofw_real_bounce_alloc(void *);
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SYSINIT(ofw_real_bounce_alloc, SI_SUB_VM, SI_ORDER_ANY,
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ofw_real_bounce_alloc, NULL);
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static void
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ofw_real_start(void)
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{
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mtx_lock(&of_bounce_mtx);
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of_bounce_offset = 0;
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}
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static void
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ofw_real_stop(void)
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{
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mtx_unlock(&of_bounce_mtx);
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}
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static void
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ofw_real_bounce_alloc(void *junk)
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{
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/*
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* Check that ofw_real is actually in use before allocating wads
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* of memory. Do this by checking if our mutex has been set up.
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*/
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if (!mtx_initialized(&of_bounce_mtx))
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return;
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/*
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* Allocate a page of contiguous, wired physical memory that can
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* fit into a 32-bit address space.
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*/
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mtx_lock(&of_bounce_mtx);
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of_bounce_virt = contigmalloc(PAGE_SIZE, M_OFWREAL, 0,
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0, BUS_SPACE_MAXADDR_32BIT, PAGE_SIZE, PAGE_SIZE);
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of_bounce_phys = vtophys(of_bounce_virt);
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of_bounce_size = PAGE_SIZE;
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mtx_unlock(&of_bounce_mtx);
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}
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static cell_t
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ofw_real_map(const void *buf, size_t len)
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{
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cell_t phys;
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mtx_assert(&of_bounce_mtx, MA_OWNED);
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if (of_bounce_virt == NULL) {
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if (!pmap_bootstrapped)
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return (cell_t)buf;
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/*
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* XXX: It is possible for us to get called before the VM has
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* come online, but after the MMU is up. We don't have the
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* bounce buffer yet, but can no longer presume a 1:1 mapping.
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* Grab the physical address of the buffer, and hope it is
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* in range if this happens.
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*/
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return (cell_t)vtophys(buf);
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}
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/*
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* Make sure the bounce page offset satisfies any reasonable
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* alignment constraint.
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*/
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of_bounce_offset += of_bounce_offset % sizeof(register_t);
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if (of_bounce_offset + len > of_bounce_size) {
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panic("Oversize Open Firmware call!");
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return 0;
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}
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memcpy(of_bounce_virt + of_bounce_offset, buf, len);
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phys = of_bounce_phys + of_bounce_offset;
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of_bounce_offset += len;
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return phys;
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}
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static void
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ofw_real_unmap(cell_t physaddr, void *buf, size_t len)
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{
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mtx_assert(&of_bounce_mtx, MA_OWNED);
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if (of_bounce_virt == NULL)
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return;
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memcpy(buf,of_bounce_virt + (physaddr - of_bounce_phys),len);
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}
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/* Initialiser */
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static void
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ofw_real_init(ofw_t ofw, void *openfirm)
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{
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openfirmware = (int (*)(void *))openfirm;
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mtx_init(&of_bounce_mtx, "OF Bounce Page", MTX_DEF, 0);
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of_bounce_virt = NULL;
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}
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/*
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* Generic functions
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*/
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/* Test to see if a service exists. */
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static int
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ofw_real_test(ofw_t ofw, const char *name)
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{
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static struct {
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cell_t name;
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cell_t nargs;
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cell_t nreturns;
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cell_t service;
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cell_t missing;
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} args = {
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(cell_t)"test",
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1,
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1,
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};
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ofw_real_start();
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args.service = ofw_real_map(name, strlen(name) + 1);
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if (args.service == 0 || openfirmware(&args) == -1) {
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ofw_real_stop();
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return (-1);
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}
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ofw_real_stop();
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return (args.missing);
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}
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/*
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* Device tree functions
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*/
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/* Return the next sibling of this node or 0. */
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static phandle_t
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ofw_real_peer(ofw_t ofw, phandle_t node)
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{
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static struct {
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cell_t name;
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cell_t nargs;
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cell_t nreturns;
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cell_t node;
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cell_t next;
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} args = {
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(cell_t)"peer",
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1,
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1,
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};
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args.node = node;
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if (openfirmware(&args) == -1)
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return (-1);
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return (args.next);
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}
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/* Return the first child of this node or 0. */
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static phandle_t
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ofw_real_child(ofw_t ofw, phandle_t node)
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{
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static struct {
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cell_t name;
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cell_t nargs;
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cell_t nreturns;
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cell_t node;
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cell_t child;
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} args = {
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(cell_t)"child",
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1,
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1,
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};
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args.node = node;
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if (openfirmware(&args) == -1)
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return (-1);
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return (args.child);
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}
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/* Return the parent of this node or 0. */
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static phandle_t
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ofw_real_parent(ofw_t ofw, phandle_t node)
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{
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static struct {
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cell_t name;
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cell_t nargs;
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cell_t nreturns;
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cell_t node;
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cell_t parent;
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} args = {
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(cell_t)"parent",
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1,
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1,
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};
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args.node = node;
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if (openfirmware(&args) == -1)
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return (-1);
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return (args.parent);
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}
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/* Return the package handle that corresponds to an instance handle. */
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static phandle_t
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ofw_real_instance_to_package(ofw_t ofw, ihandle_t instance)
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{
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static struct {
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cell_t name;
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cell_t nargs;
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cell_t nreturns;
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cell_t instance;
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cell_t package;
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} args = {
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(cell_t)"instance-to-package",
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1,
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1,
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};
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args.instance = instance;
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if (openfirmware(&args) == -1)
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return (-1);
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return (args.package);
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}
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/* Get the length of a property of a package. */
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static ssize_t
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ofw_real_getproplen(ofw_t ofw, phandle_t package, const char *propname)
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{
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static struct {
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cell_t name;
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cell_t nargs;
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cell_t nreturns;
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cell_t package;
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cell_t propname;
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cell_t proplen;
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} args = {
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(cell_t)"getproplen",
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2,
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1,
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};
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ofw_real_start();
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args.package = package;
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args.propname = ofw_real_map(propname, strlen(propname) + 1);
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if (args.propname == 0 || openfirmware(&args) == -1) {
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ofw_real_stop();
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return (-1);
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}
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ofw_real_stop();
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return (args.proplen);
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}
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/* Get the value of a property of a package. */
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static ssize_t
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ofw_real_getprop(ofw_t ofw, phandle_t package, const char *propname, void *buf,
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size_t buflen)
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{
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static struct {
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cell_t name;
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cell_t nargs;
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cell_t nreturns;
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cell_t package;
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cell_t propname;
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cell_t buf;
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cell_t buflen;
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cell_t size;
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} args = {
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(cell_t)"getprop",
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4,
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1,
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};
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ofw_real_start();
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args.package = package;
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args.propname = ofw_real_map(propname, strlen(propname) + 1);
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args.buf = ofw_real_map(buf, buflen);
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args.buflen = buflen;
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if (args.propname == 0 || args.buf == 0 || openfirmware(&args) == -1) {
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ofw_real_stop();
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||||
return (-1);
|
||||
}
|
||||
ofw_real_unmap(args.buf, buf, buflen);
|
||||
|
||||
ofw_real_stop();
|
||||
return (args.size);
|
||||
}
|
||||
|
||||
/* Get the next property of a package. */
|
||||
static int
|
||||
ofw_real_nextprop(ofw_t ofw, phandle_t package, const char *previous,
|
||||
char *buf, size_t size)
|
||||
{
|
||||
static struct {
|
||||
cell_t name;
|
||||
cell_t nargs;
|
||||
cell_t nreturns;
|
||||
cell_t package;
|
||||
cell_t previous;
|
||||
cell_t buf;
|
||||
cell_t flag;
|
||||
} args = {
|
||||
(cell_t)"nextprop",
|
||||
3,
|
||||
1,
|
||||
};
|
||||
|
||||
ofw_real_start();
|
||||
|
||||
args.package = package;
|
||||
args.previous = ofw_real_map(previous, strlen(previous) + 1);
|
||||
args.buf = ofw_real_map(buf, size);
|
||||
if (args.previous == 0 || args.buf == 0 || openfirmware(&args) == -1) {
|
||||
ofw_real_stop();
|
||||
return (-1);
|
||||
}
|
||||
ofw_real_unmap(args.buf, buf, size);
|
||||
|
||||
ofw_real_stop();
|
||||
return (args.flag);
|
||||
}
|
||||
|
||||
/* Set the value of a property of a package. */
|
||||
/* XXX Has a bug on FirePower */
|
||||
static int
|
||||
ofw_real_setprop(ofw_t ofw, phandle_t package, char *propname, void *buf,
|
||||
size_t len)
|
||||
{
|
||||
static struct {
|
||||
cell_t name;
|
||||
cell_t nargs;
|
||||
cell_t nreturns;
|
||||
cell_t package;
|
||||
cell_t propname;
|
||||
cell_t buf;
|
||||
cell_t len;
|
||||
cell_t size;
|
||||
} args = {
|
||||
(cell_t)"setprop",
|
||||
4,
|
||||
1,
|
||||
};
|
||||
|
||||
ofw_real_start();
|
||||
|
||||
args.package = package;
|
||||
args.propname = ofw_real_map(propname, strlen(propname) + 1);
|
||||
args.buf = ofw_real_map(buf, len);
|
||||
args.len = len;
|
||||
if (args.propname == 0 || args.buf == 0 || openfirmware(&args) == -1) {
|
||||
ofw_real_stop();
|
||||
return (-1);
|
||||
}
|
||||
ofw_real_stop();
|
||||
return (args.size);
|
||||
}
|
||||
|
||||
/* Convert a device specifier to a fully qualified pathname. */
|
||||
static ssize_t
|
||||
ofw_real_canon(ofw_t ofw, const char *device, char *buf, size_t len)
|
||||
{
|
||||
static struct {
|
||||
cell_t name;
|
||||
cell_t nargs;
|
||||
cell_t nreturns;
|
||||
cell_t device;
|
||||
cell_t buf;
|
||||
cell_t len;
|
||||
cell_t size;
|
||||
} args = {
|
||||
(cell_t)"canon",
|
||||
3,
|
||||
1,
|
||||
};
|
||||
|
||||
ofw_real_start();
|
||||
|
||||
args.device = ofw_real_map(device, strlen(device) + 1);
|
||||
args.buf = ofw_real_map(buf, len);
|
||||
args.len = len;
|
||||
if (args.device == 0 || args.buf == 0 || openfirmware(&args) == -1) {
|
||||
ofw_real_stop();
|
||||
return (-1);
|
||||
}
|
||||
ofw_real_unmap(args.buf, buf, len);
|
||||
|
||||
ofw_real_stop();
|
||||
return (args.size);
|
||||
}
|
||||
|
||||
/* Return a package handle for the specified device. */
|
||||
static phandle_t
|
||||
ofw_real_finddevice(ofw_t ofw, const char *device)
|
||||
{
|
||||
static struct {
|
||||
cell_t name;
|
||||
cell_t nargs;
|
||||
cell_t nreturns;
|
||||
cell_t device;
|
||||
cell_t package;
|
||||
} args = {
|
||||
(cell_t)"finddevice",
|
||||
1,
|
||||
1,
|
||||
};
|
||||
|
||||
ofw_real_start();
|
||||
|
||||
args.device = ofw_real_map(device, strlen(device) + 1);
|
||||
if (args.device == 0 || openfirmware(&args) == -1) {
|
||||
ofw_real_stop();
|
||||
return (-1);
|
||||
}
|
||||
ofw_real_stop();
|
||||
return (args.package);
|
||||
}
|
||||
|
||||
/* Return the fully qualified pathname corresponding to an instance. */
|
||||
static ssize_t
|
||||
ofw_real_instance_to_path(ofw_t ofw, ihandle_t instance, char *buf, size_t len)
|
||||
{
|
||||
static struct {
|
||||
cell_t name;
|
||||
cell_t nargs;
|
||||
cell_t nreturns;
|
||||
cell_t instance;
|
||||
cell_t buf;
|
||||
cell_t len;
|
||||
cell_t size;
|
||||
} args = {
|
||||
(cell_t)"instance-to-path",
|
||||
3,
|
||||
1,
|
||||
};
|
||||
|
||||
ofw_real_start();
|
||||
|
||||
args.instance = instance;
|
||||
args.buf = ofw_real_map(buf, len);
|
||||
args.len = len;
|
||||
if (args.buf == 0 || openfirmware(&args) == -1) {
|
||||
ofw_real_stop();
|
||||
return (-1);
|
||||
}
|
||||
ofw_real_unmap(args.buf, buf, len);
|
||||
|
||||
ofw_real_stop();
|
||||
return (args.size);
|
||||
}
|
||||
|
||||
/* Return the fully qualified pathname corresponding to a package. */
|
||||
static ssize_t
|
||||
ofw_real_package_to_path(ofw_t ofw, phandle_t package, char *buf, size_t len)
|
||||
{
|
||||
static struct {
|
||||
cell_t name;
|
||||
cell_t nargs;
|
||||
cell_t nreturns;
|
||||
cell_t package;
|
||||
cell_t buf;
|
||||
cell_t len;
|
||||
cell_t size;
|
||||
} args = {
|
||||
(cell_t)"package-to-path",
|
||||
3,
|
||||
1,
|
||||
};
|
||||
|
||||
ofw_real_start();
|
||||
|
||||
args.package = package;
|
||||
args.buf = ofw_real_map(buf, len);
|
||||
args.len = len;
|
||||
if (args.buf == 0 || openfirmware(&args) == -1) {
|
||||
ofw_real_stop();
|
||||
return (-1);
|
||||
}
|
||||
ofw_real_unmap(args.buf, buf, len);
|
||||
|
||||
ofw_real_stop();
|
||||
return (args.size);
|
||||
}
|
||||
|
||||
/* Call the method in the scope of a given instance. */
|
||||
static int
|
||||
ofw_real_call_method(ofw_t ofw, ihandle_t instance, const char *method,
|
||||
int nargs, int nreturns, unsigned long *args_and_returns)
|
||||
{
|
||||
static struct {
|
||||
cell_t name;
|
||||
cell_t nargs;
|
||||
cell_t nreturns;
|
||||
cell_t method;
|
||||
cell_t instance;
|
||||
cell_t args_n_results[12];
|
||||
} args = {
|
||||
(cell_t)"call-method",
|
||||
2,
|
||||
1,
|
||||
};
|
||||
cell_t *cp;
|
||||
unsigned long *ap;
|
||||
int n;
|
||||
|
||||
if (nargs > 6)
|
||||
return (-1);
|
||||
|
||||
ofw_real_start();
|
||||
args.nargs = nargs + 2;
|
||||
args.nreturns = nreturns + 1;
|
||||
args.method = ofw_real_map(method, strlen(method) + 1);
|
||||
args.instance = instance;
|
||||
|
||||
ap = args_and_returns;
|
||||
for (cp = args.args_n_results + (n = nargs); --n >= 0;)
|
||||
*--cp = *(ap++);
|
||||
if (args.method == 0 || openfirmware(&args) == -1) {
|
||||
ofw_real_stop();
|
||||
return (-1);
|
||||
}
|
||||
ofw_real_stop();
|
||||
if (args.args_n_results[nargs])
|
||||
return (args.args_n_results[nargs]);
|
||||
for (cp = args.args_n_results + nargs + (n = args.nreturns); --n > 0;)
|
||||
*(ap++) = *--cp;
|
||||
return (0);
|
||||
}
|
||||
|
||||
/*
|
||||
* Device I/O functions
|
||||
*/
|
||||
|
||||
/* Open an instance for a device. */
|
||||
static ihandle_t
|
||||
ofw_real_open(ofw_t ofw, const char *device)
|
||||
{
|
||||
static struct {
|
||||
cell_t name;
|
||||
cell_t nargs;
|
||||
cell_t nreturns;
|
||||
cell_t device;
|
||||
cell_t instance;
|
||||
} args = {
|
||||
(cell_t)"open",
|
||||
1,
|
||||
1,
|
||||
};
|
||||
|
||||
ofw_real_start();
|
||||
|
||||
args.device = ofw_real_map(device, strlen(device) + 1);
|
||||
if (args.device == 0 || openfirmware(&args) == -1
|
||||
|| args.instance == 0) {
|
||||
ofw_real_stop();
|
||||
return (-1);
|
||||
}
|
||||
ofw_real_stop();
|
||||
return (args.instance);
|
||||
}
|
||||
|
||||
/* Close an instance. */
|
||||
static void
|
||||
ofw_real_close(ofw_t ofw, ihandle_t instance)
|
||||
{
|
||||
static struct {
|
||||
cell_t name;
|
||||
cell_t nargs;
|
||||
cell_t nreturns;
|
||||
cell_t instance;
|
||||
} args = {
|
||||
(cell_t)"close",
|
||||
1,
|
||||
};
|
||||
|
||||
args.instance = instance;
|
||||
openfirmware(&args);
|
||||
}
|
||||
|
||||
/* Read from an instance. */
|
||||
static ssize_t
|
||||
ofw_real_read(ofw_t ofw, ihandle_t instance, void *addr, size_t len)
|
||||
{
|
||||
static struct {
|
||||
cell_t name;
|
||||
cell_t nargs;
|
||||
cell_t nreturns;
|
||||
cell_t instance;
|
||||
cell_t addr;
|
||||
cell_t len;
|
||||
cell_t actual;
|
||||
} args = {
|
||||
(cell_t)"read",
|
||||
3,
|
||||
1,
|
||||
};
|
||||
|
||||
ofw_real_start();
|
||||
|
||||
args.instance = instance;
|
||||
args.addr = ofw_real_map(addr, len);
|
||||
args.len = len;
|
||||
if (args.addr == 0 || openfirmware(&args) == -1) {
|
||||
ofw_real_stop();
|
||||
return (-1);
|
||||
}
|
||||
ofw_real_unmap(args.addr, addr, len);
|
||||
|
||||
ofw_real_stop();
|
||||
return (args.actual);
|
||||
}
|
||||
|
||||
/* Write to an instance. */
|
||||
static ssize_t
|
||||
ofw_real_write(ofw_t ofw, ihandle_t instance, const void *addr, size_t len)
|
||||
{
|
||||
static struct {
|
||||
cell_t name;
|
||||
cell_t nargs;
|
||||
cell_t nreturns;
|
||||
cell_t instance;
|
||||
cell_t addr;
|
||||
cell_t len;
|
||||
cell_t actual;
|
||||
} args = {
|
||||
(cell_t)"write",
|
||||
3,
|
||||
1,
|
||||
};
|
||||
|
||||
ofw_real_start();
|
||||
|
||||
args.instance = instance;
|
||||
args.addr = ofw_real_map(addr, len);
|
||||
args.len = len;
|
||||
if (args.addr == 0 || openfirmware(&args) == -1) {
|
||||
ofw_real_stop();
|
||||
return (-1);
|
||||
}
|
||||
ofw_real_stop();
|
||||
return (args.actual);
|
||||
}
|
||||
|
||||
/* Seek to a position. */
|
||||
static int
|
||||
ofw_real_seek(ofw_t ofw, ihandle_t instance, u_int64_t pos)
|
||||
{
|
||||
static struct {
|
||||
cell_t name;
|
||||
cell_t nargs;
|
||||
cell_t nreturns;
|
||||
cell_t instance;
|
||||
cell_t poshi;
|
||||
cell_t poslo;
|
||||
cell_t status;
|
||||
} args = {
|
||||
(cell_t)"seek",
|
||||
3,
|
||||
1,
|
||||
};
|
||||
|
||||
args.instance = instance;
|
||||
args.poshi = pos >> 32;
|
||||
args.poslo = pos;
|
||||
if (openfirmware(&args) == -1)
|
||||
return (-1);
|
||||
return (args.status);
|
||||
}
|
||||
|
||||
/*
|
||||
* Memory functions
|
||||
*/
|
||||
|
||||
/* Claim an area of memory. */
|
||||
static caddr_t
|
||||
ofw_real_claim(ofw_t ofw, void *virt, size_t size, u_int align)
|
||||
{
|
||||
static struct {
|
||||
cell_t name;
|
||||
cell_t nargs;
|
||||
cell_t nreturns;
|
||||
cell_t virt;
|
||||
cell_t size;
|
||||
cell_t align;
|
||||
cell_t baseaddr;
|
||||
} args = {
|
||||
(cell_t)"claim",
|
||||
3,
|
||||
1,
|
||||
};
|
||||
|
||||
args.virt = (cell_t)virt;
|
||||
args.size = size;
|
||||
args.align = align;
|
||||
if (openfirmware(&args) == -1)
|
||||
return ((void *)-1);
|
||||
return ((void *)args.baseaddr);
|
||||
}
|
||||
|
||||
/* Release an area of memory. */
|
||||
static void
|
||||
ofw_real_release(ofw_t ofw, void *virt, size_t size)
|
||||
{
|
||||
static struct {
|
||||
cell_t name;
|
||||
cell_t nargs;
|
||||
cell_t nreturns;
|
||||
cell_t virt;
|
||||
cell_t size;
|
||||
} args = {
|
||||
(cell_t)"release",
|
||||
2,
|
||||
};
|
||||
|
||||
args.virt = (cell_t)virt;
|
||||
args.size = size;
|
||||
openfirmware(&args);
|
||||
}
|
||||
|
||||
/*
|
||||
* Control transfer functions
|
||||
*/
|
||||
|
||||
/* Suspend and drop back to the Open Firmware interface. */
|
||||
static void
|
||||
ofw_real_enter(ofw_t ofw)
|
||||
{
|
||||
static struct {
|
||||
cell_t name;
|
||||
cell_t nargs;
|
||||
cell_t nreturns;
|
||||
} args = {
|
||||
(cell_t)"enter",
|
||||
};
|
||||
|
||||
openfirmware(&args);
|
||||
/* We may come back. */
|
||||
}
|
||||
|
||||
/* Shut down and drop back to the Open Firmware interface. */
|
||||
static void
|
||||
ofw_real_exit(ofw_t ofw)
|
||||
{
|
||||
static struct {
|
||||
cell_t name;
|
||||
cell_t nargs;
|
||||
cell_t nreturns;
|
||||
} args = {
|
||||
(cell_t)"exit",
|
||||
};
|
||||
|
||||
openfirmware(&args);
|
||||
for (;;) /* just in case */
|
||||
;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user