4b2b0f5043
an FDT. This is how Linux and OS X boot and can avoid some issues with using Open Firmware at runtime. The code is highly experimental and disabled by default; it can be turned on by setting the loader environment variable "usefdt" to a non-NULL value.
786 lines
15 KiB
C
786 lines
15 KiB
C
/* $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 <machine/stdarg.h>
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#include <stand.h>
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#include "openfirm.h"
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int (*openfirmware)(void *);
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phandle_t chosen;
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ihandle_t mmu;
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ihandle_t memory;
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int real_mode = 0;
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/* Initialiser */
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void
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OF_init(int (*openfirm)(void *))
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{
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phandle_t options;
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char mode[sizeof("true")];
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openfirmware = openfirm;
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if ((chosen = OF_finddevice("/chosen")) == -1)
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OF_exit();
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if (OF_getprop(chosen, "memory", &memory, sizeof(memory)) == -1) {
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memory = OF_open("/memory");
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if (memory == -1)
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memory = OF_open("/memory@0");
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if (memory == -1)
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OF_exit();
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}
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if (OF_getprop(chosen, "mmu", &mmu, sizeof(mmu)) == -1)
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OF_exit();
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/*
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* Check if we run in real mode. If so, we do not need to map
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* memory later on.
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*/
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options = OF_finddevice("/options");
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if (OF_getprop(options, "real-mode?", mode, sizeof(mode)) > 0 &&
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strcmp(mode, "true") == 0)
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real_mode = 1;
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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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int
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OF_test(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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args.service = (cell_t)name;
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if (openfirmware(&args) == -1)
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return (-1);
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return (args.missing);
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}
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/* Return firmware millisecond count. */
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int
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OF_milliseconds()
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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 ms;
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} args = {
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(cell_t)"milliseconds",
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0,
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1,
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};
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openfirmware(&args);
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return (args.ms);
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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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phandle_t
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OF_peer(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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phandle_t
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OF_child(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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phandle_t
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OF_parent(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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phandle_t
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OF_instance_to_package(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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int
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OF_getproplen(phandle_t package, 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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args.package = package;
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args.propname = (cell_t)propname;
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if (openfirmware(&args) == -1)
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return (-1);
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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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int
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OF_getprop(phandle_t package, char *propname, void *buf, int 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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args.package = package;
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args.propname = (cell_t)propname;
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args.buf = (cell_t)buf;
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args.buflen = buflen;
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if (openfirmware(&args) == -1)
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return (-1);
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return (args.size);
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}
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/* Get the next property of a package. */
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int
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OF_nextprop(phandle_t package, char *previous, char *buf)
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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 previous;
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cell_t buf;
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cell_t flag;
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} args = {
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(cell_t)"nextprop",
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3,
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1,
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};
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args.package = package;
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args.previous = (cell_t)previous;
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args.buf = (cell_t)buf;
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if (openfirmware(&args) == -1)
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return (-1);
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return (args.flag);
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}
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/* Set the value of a property of a package. */
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/* XXX Has a bug on FirePower */
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int
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OF_setprop(phandle_t package, char *propname, void *buf, int len)
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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 len;
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cell_t size;
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} args = {
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(cell_t)"setprop",
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4,
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1,
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};
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args.package = package;
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args.propname = (cell_t)propname;
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args.buf = (cell_t)buf;
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args.len = len;
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if (openfirmware(&args) == -1)
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return (-1);
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return (args.size);
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}
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/* Convert a device specifier to a fully qualified pathname. */
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int
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OF_canon(const char *device, char *buf, int len)
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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 device;
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cell_t buf;
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cell_t len;
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cell_t size;
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} args = {
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(cell_t)"canon",
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3,
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1,
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};
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args.device = (cell_t)device;
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args.buf = (cell_t)buf;
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args.len = len;
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if (openfirmware(&args) == -1)
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return (-1);
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return (args.size);
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}
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/* Return a package handle for the specified device. */
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phandle_t
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OF_finddevice(const char *device)
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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 device;
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cell_t package;
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} args = {
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(cell_t)"finddevice",
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1,
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1,
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};
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args.device = (cell_t)device;
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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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/* Return the fully qualified pathname corresponding to an instance. */
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int
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OF_instance_to_path(ihandle_t instance, char *buf, int len)
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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 buf;
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cell_t len;
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cell_t size;
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} args = {
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(cell_t)"instance-to-path",
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3,
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1,
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};
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args.instance = instance;
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args.buf = (cell_t)buf;
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args.len = len;
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if (openfirmware(&args) == -1)
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return (-1);
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return (args.size);
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}
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/* Return the fully qualified pathname corresponding to a package. */
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int
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OF_package_to_path(phandle_t package, char *buf, int len)
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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 buf;
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cell_t len;
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cell_t size;
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} args = {
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(cell_t)"package-to-path",
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3,
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1,
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};
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args.package = package;
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args.buf = (cell_t)buf;
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args.len = len;
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if (openfirmware(&args) == -1)
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return (-1);
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return (args.size);
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}
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|
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/* Call the method in the scope of a given instance. */
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int
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OF_call_method(char *method, ihandle_t instance, int nargs, int nreturns, ...)
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{
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va_list ap;
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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 method;
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cell_t instance;
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cell_t args_n_results[12];
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} args = {
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(cell_t)"call-method",
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2,
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1,
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};
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cell_t *cp;
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int n;
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if (nargs > 6)
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return (-1);
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args.nargs = nargs + 2;
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args.nreturns = nreturns + 1;
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args.method = (cell_t)method;
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args.instance = instance;
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va_start(ap, nreturns);
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for (cp = (cell_t *)(args.args_n_results + (n = nargs)); --n >= 0;)
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*--cp = va_arg(ap, cell_t);
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if (openfirmware(&args) == -1)
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return (-1);
|
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if (args.args_n_results[nargs])
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return (args.args_n_results[nargs]);
|
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for (cp = (cell_t *)(args.args_n_results + nargs + (n = args.nreturns));
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--n > 0;)
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*va_arg(ap, cell_t *) = *--cp;
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va_end(ap);
|
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return (0);
|
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}
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|
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/*
|
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* Device I/O functions
|
|
*/
|
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|
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/* Open an instance for a device. */
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ihandle_t
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OF_open(char *device)
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{
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static struct {
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cell_t name;
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cell_t nargs;
|
|
cell_t nreturns;
|
|
cell_t device;
|
|
cell_t instance;
|
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} args = {
|
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(cell_t)"open",
|
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1,
|
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1,
|
|
};
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|
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args.device = (cell_t)device;
|
|
if (openfirmware(&args) == -1 || args.instance == 0) {
|
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return (-1);
|
|
}
|
|
return (args.instance);
|
|
}
|
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|
|
/* Close an instance. */
|
|
void
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OF_close(ihandle_t instance)
|
|
{
|
|
static struct {
|
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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. */
|
|
int
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OF_read(ihandle_t instance, void *addr, int len)
|
|
{
|
|
static struct {
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|
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,
|
|
};
|
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|
|
args.instance = instance;
|
|
args.addr = (cell_t)addr;
|
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args.len = len;
|
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|
|
#if defined(OPENFIRM_DEBUG)
|
|
printf("OF_read: called with instance=%08x, addr=%p, len=%d\n",
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args.instance, args.addr, args.len);
|
|
#endif
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|
|
if (openfirmware(&args) == -1)
|
|
return (-1);
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|
|
#if defined(OPENFIRM_DEBUG)
|
|
printf("OF_read: returning instance=%d, addr=%p, len=%d, actual=%d\n",
|
|
args.instance, args.addr, args.len, args.actual);
|
|
#endif
|
|
|
|
return (args.actual);
|
|
}
|
|
|
|
/* Write to an instance. */
|
|
int
|
|
OF_write(ihandle_t instance, void *addr, int 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,
|
|
};
|
|
|
|
args.instance = instance;
|
|
args.addr = (cell_t)addr;
|
|
args.len = len;
|
|
if (openfirmware(&args) == -1)
|
|
return (-1);
|
|
return (args.actual);
|
|
}
|
|
|
|
/* Seek to a position. */
|
|
int
|
|
OF_seek(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. */
|
|
void *
|
|
OF_claim(void *virt, u_int 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. */
|
|
void
|
|
OF_release(void *virt, u_int 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
|
|
*/
|
|
|
|
/* Reset the system and call "boot <bootspec>". */
|
|
void
|
|
OF_boot(char *bootspec)
|
|
{
|
|
static struct {
|
|
cell_t name;
|
|
cell_t nargs;
|
|
cell_t nreturns;
|
|
cell_t bootspec;
|
|
} args = {
|
|
(cell_t)"boot",
|
|
1,
|
|
};
|
|
|
|
args.bootspec = (cell_t)bootspec;
|
|
openfirmware(&args);
|
|
for (;;) /* just in case */
|
|
;
|
|
}
|
|
|
|
/* Suspend and drop back to the Open Firmware interface. */
|
|
void
|
|
OF_enter()
|
|
{
|
|
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. */
|
|
void
|
|
OF_exit()
|
|
{
|
|
static struct {
|
|
cell_t name;
|
|
cell_t nargs;
|
|
cell_t nreturns;
|
|
} args = {
|
|
(cell_t)"exit",
|
|
};
|
|
|
|
openfirmware(&args);
|
|
for (;;) /* just in case */
|
|
;
|
|
}
|
|
|
|
void
|
|
OF_quiesce()
|
|
{
|
|
static struct {
|
|
cell_t name;
|
|
cell_t nargs;
|
|
cell_t nreturns;
|
|
} args = {
|
|
(cell_t)"quiesce",
|
|
};
|
|
|
|
openfirmware(&args);
|
|
}
|
|
|
|
/* Free <size> bytes starting at <virt>, then call <entry> with <arg>. */
|
|
#if 0
|
|
void
|
|
OF_chain(void *virt, u_int size, void (*entry)(), void *arg, u_int len)
|
|
{
|
|
static struct {
|
|
cell_t name;
|
|
cell_t nargs;
|
|
cell_t nreturns;
|
|
cell_t virt;
|
|
cell_t size;
|
|
cell_t entry;
|
|
cell_t arg;
|
|
cell_t len;
|
|
} args = {
|
|
(cell_t)"chain",
|
|
5,
|
|
};
|
|
|
|
args.virt = (cell_t)virt;
|
|
args.size = size;
|
|
args.entry = (cell_t)entry;
|
|
args.arg = (cell_t)arg;
|
|
args.len = len;
|
|
openfirmware(&args);
|
|
}
|
|
#else
|
|
void
|
|
OF_chain(void *virt, u_int size, void (*entry)(), void *arg, u_int len)
|
|
{
|
|
/*
|
|
* This is a REALLY dirty hack till the firmware gets this going
|
|
*/
|
|
#if 0
|
|
if (size > 0)
|
|
OF_release(virt, size);
|
|
#endif
|
|
entry(0, 0, openfirmware, arg, len);
|
|
}
|
|
#endif
|