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| Current File : //usr/src/sys/dev/ofw/ofw_standard.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: release/9.1.0/sys/dev/ofw/ofw_standard.c 212477 2010-09-11 18:55:00Z 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"
static int ofw_std_init(ofw_t ofw, void *openfirm);
static int ofw_std_test(ofw_t ofw, const char *name);
static int ofw_std_interpret(ofw_t ofw, const char *cmd, int nreturns,
cell_t *returns);
static phandle_t ofw_std_peer(ofw_t ofw, phandle_t node);
static phandle_t ofw_std_child(ofw_t ofw, phandle_t node);
static phandle_t ofw_std_parent(ofw_t ofw, phandle_t node);
static phandle_t ofw_std_instance_to_package(ofw_t ofw, ihandle_t instance);
static ssize_t ofw_std_getproplen(ofw_t ofw, phandle_t package,
const char *propname);
static ssize_t ofw_std_getprop(ofw_t ofw, phandle_t package,
const char *propname, void *buf, size_t buflen);
static int ofw_std_nextprop(ofw_t ofw, phandle_t package, const char *previous,
char *buf, size_t);
static int ofw_std_setprop(ofw_t ofw, phandle_t package, const char *propname,
const void *buf, size_t len);
static ssize_t ofw_std_canon(ofw_t ofw, const char *device, char *buf,
size_t len);
static phandle_t ofw_std_finddevice(ofw_t ofw, const char *device);
static ssize_t ofw_std_instance_to_path(ofw_t ofw, ihandle_t instance,
char *buf, size_t len);
static ssize_t ofw_std_package_to_path(ofw_t ofw, phandle_t package, char *buf,
size_t len);
static int ofw_std_call_method(ofw_t ofw, ihandle_t instance,
const char *method, int nargs, int nreturns, cell_t *args_and_returns);
static ihandle_t ofw_std_open(ofw_t ofw, const char *device);
static void ofw_std_close(ofw_t ofw, ihandle_t instance);
static ssize_t ofw_std_read(ofw_t ofw, ihandle_t instance, void *addr,
size_t len);
static ssize_t ofw_std_write(ofw_t ofw, ihandle_t instance, const void *addr,
size_t len);
static int ofw_std_seek(ofw_t ofw, ihandle_t instance, uint64_t pos);
static caddr_t ofw_std_claim(ofw_t ofw, void *virt, size_t size, u_int align);
static void ofw_std_release(ofw_t ofw, void *virt, size_t size);
static void ofw_std_enter(ofw_t ofw);
static void ofw_std_exit(ofw_t ofw);
static ofw_method_t ofw_std_methods[] = {
OFWMETHOD(ofw_init, ofw_std_init),
OFWMETHOD(ofw_peer, ofw_std_peer),
OFWMETHOD(ofw_child, ofw_std_child),
OFWMETHOD(ofw_parent, ofw_std_parent),
OFWMETHOD(ofw_instance_to_package, ofw_std_instance_to_package),
OFWMETHOD(ofw_getproplen, ofw_std_getproplen),
OFWMETHOD(ofw_getprop, ofw_std_getprop),
OFWMETHOD(ofw_nextprop, ofw_std_nextprop),
OFWMETHOD(ofw_setprop, ofw_std_setprop),
OFWMETHOD(ofw_canon, ofw_std_canon),
OFWMETHOD(ofw_finddevice, ofw_std_finddevice),
OFWMETHOD(ofw_instance_to_path, ofw_std_instance_to_path),
OFWMETHOD(ofw_package_to_path, ofw_std_package_to_path),
OFWMETHOD(ofw_test, ofw_std_test),
OFWMETHOD(ofw_call_method, ofw_std_call_method),
OFWMETHOD(ofw_interpret, ofw_std_interpret),
OFWMETHOD(ofw_open, ofw_std_open),
OFWMETHOD(ofw_close, ofw_std_close),
OFWMETHOD(ofw_read, ofw_std_read),
OFWMETHOD(ofw_write, ofw_std_write),
OFWMETHOD(ofw_seek, ofw_std_seek),
OFWMETHOD(ofw_claim, ofw_std_claim),
OFWMETHOD(ofw_release, ofw_std_release),
OFWMETHOD(ofw_enter, ofw_std_enter),
OFWMETHOD(ofw_exit, ofw_std_exit),
{ 0, 0 }
};
static ofw_def_t ofw_std = {
OFW_STD_DIRECT,
ofw_std_methods,
0
};
OFW_DEF(ofw_std);
static int (*openfirmware)(void *);
/* Initializer */
static int
ofw_std_init(ofw_t ofw, void *openfirm)
{
openfirmware = (int (*)(void *))openfirm;
return (0);
}
/*
* Generic functions
*/
/* Test to see if a service exists. */
static int
ofw_std_test(ofw_t ofw, const char *name)
{
struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t service;
cell_t missing;
} args = {
(cell_t)"test",
1,
1,
};
args.service = (cell_t)name;
if (openfirmware(&args) == -1)
return (-1);
return (args.missing);
}
static int
ofw_std_interpret(ofw_t ofw, const char *cmd, int nreturns, cell_t *returns)
{
struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t slot[16];
} args = {
(cell_t)"interpret",
1,
};
cell_t status;
int i = 0, j = 0;
args.nreturns = ++nreturns;
args.slot[i++] = (cell_t)cmd;
if (openfirmware(&args) == -1)
return (-1);
status = args.slot[i++];
while (i < 1 + nreturns)
returns[j++] = args.slot[i++];
return (status);
}
/*
* Device tree functions
*/
/* Return the next sibling of this node or 0. */
static phandle_t
ofw_std_peer(ofw_t ofw, phandle_t node)
{
struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t node;
cell_t next;
} args = {
(cell_t)"peer",
1,
1,
};
args.node = node;
if (openfirmware(&args) == -1)
return (-1);
return (args.next);
}
/* Return the first child of this node or 0. */
static phandle_t
ofw_std_child(ofw_t ofw, phandle_t node)
{
struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t node;
cell_t child;
} args = {
(cell_t)"child",
1,
1,
};
args.node = node;
if (openfirmware(&args) == -1)
return (-1);
return (args.child);
}
/* Return the parent of this node or 0. */
static phandle_t
ofw_std_parent(ofw_t ofw, phandle_t node)
{
struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t node;
cell_t parent;
} args = {
(cell_t)"parent",
1,
1,
};
args.node = node;
if (openfirmware(&args) == -1)
return (-1);
return (args.parent);
}
/* Return the package handle that corresponds to an instance handle. */
static phandle_t
ofw_std_instance_to_package(ofw_t ofw, ihandle_t instance)
{
struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t instance;
cell_t package;
} args = {
(cell_t)"instance-to-package",
1,
1,
};
args.instance = instance;
if (openfirmware(&args) == -1)
return (-1);
return (args.package);
}
/* Get the length of a property of a package. */
static ssize_t
ofw_std_getproplen(ofw_t ofw, phandle_t package, const char *propname)
{
struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t package;
cell_t propname;
cell_t proplen;
} args = {
(cell_t)"getproplen",
2,
1,
};
args.package = package;
args.propname = (cell_t)propname;
if (openfirmware(&args) == -1)
return (-1);
return (args.proplen);
}
/* Get the value of a property of a package. */
static ssize_t
ofw_std_getprop(ofw_t ofw, phandle_t package, const char *propname, void *buf,
size_t buflen)
{
struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t package;
cell_t propname;
cell_t buf;
cell_t buflen;
cell_t size;
} args = {
(cell_t)"getprop",
4,
1,
};
args.package = package;
args.propname = (cell_t)propname;
args.buf = (cell_t)buf;
args.buflen = buflen;
if (openfirmware(&args) == -1)
return (-1);
return (args.size);
}
/* Get the next property of a package. */
static int
ofw_std_nextprop(ofw_t ofw, phandle_t package, const char *previous, char *buf,
size_t size)
{
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,
};
args.package = package;
args.previous = (cell_t)previous;
args.buf = (cell_t)buf;
if (openfirmware(&args) == -1)
return (-1);
return (args.flag);
}
/* Set the value of a property of a package. */
/* XXX Has a bug on FirePower */
static int
ofw_std_setprop(ofw_t ofw, phandle_t package, const char *propname,
const void *buf, size_t len)
{
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,
};
args.package = package;
args.propname = (cell_t)propname;
args.buf = (cell_t)buf;
args.len = len;
if (openfirmware(&args) == -1)
return (-1);
return (args.size);
}
/* Convert a device specifier to a fully qualified pathname. */
static ssize_t
ofw_std_canon(ofw_t ofw, const char *device, char *buf, size_t len)
{
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,
};
args.device = (cell_t)device;
args.buf = (cell_t)buf;
args.len = len;
if (openfirmware(&args) == -1)
return (-1);
return (args.size);
}
/* Return a package handle for the specified device. */
static phandle_t
ofw_std_finddevice(ofw_t ofw, const char *device)
{
struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t device;
cell_t package;
} args = {
(cell_t)"finddevice",
1,
1,
};
args.device = (cell_t)device;
if (openfirmware(&args) == -1)
return (-1);
return (args.package);
}
/* Return the fully qualified pathname corresponding to an instance. */
static ssize_t
ofw_std_instance_to_path(ofw_t ofw, ihandle_t instance, char *buf, size_t len)
{
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,
};
args.instance = instance;
args.buf = (cell_t)buf;
args.len = len;
if (openfirmware(&args) == -1)
return (-1);
return (args.size);
}
/* Return the fully qualified pathname corresponding to a package. */
static ssize_t
ofw_std_package_to_path(ofw_t ofw, phandle_t package, char *buf, size_t len)
{
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,
};
args.package = package;
args.buf = (cell_t)buf;
args.len = len;
if (openfirmware(&args) == -1)
return (-1);
return (args.size);
}
/* Call the method in the scope of a given instance. */
static int
ofw_std_call_method(ofw_t ofw, ihandle_t instance, const char *method,
int nargs, int nreturns, cell_t *args_and_returns)
{
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 *ap, *cp;
int n;
if (nargs > 6)
return (-1);
args.nargs = nargs + 2;
args.nreturns = nreturns + 1;
args.method = (cell_t)method;
args.instance = instance;
ap = args_and_returns;
for (cp = args.args_n_results + (n = nargs); --n >= 0;)
*--cp = *(ap++);
if (openfirmware(&args) == -1)
return (-1);
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_std_open(ofw_t ofw, const char *device)
{
struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t device;
cell_t instance;
} args = {
(cell_t)"open",
1,
1,
};
args.device = (cell_t)device;
if (openfirmware(&args) == -1 || args.instance == 0)
return (-1);
return (args.instance);
}
/* Close an instance. */
static void
ofw_std_close(ofw_t ofw, ihandle_t instance)
{
struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t instance;
} args = {
(cell_t)"close",
1,
0,
};
args.instance = instance;
openfirmware(&args);
}
/* Read from an instance. */
static ssize_t
ofw_std_read(ofw_t ofw, ihandle_t instance, void *addr, size_t len)
{
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,
};
args.instance = instance;
args.addr = (cell_t)addr;
args.len = len;
if (openfirmware(&args) == -1)
return (-1);
return (args.actual);
}
/* Write to an instance. */
static ssize_t
ofw_std_write(ofw_t ofw, ihandle_t instance, const void *addr, size_t len)
{
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. */
static int
ofw_std_seek(ofw_t ofw, ihandle_t instance, uint64_t pos)
{
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_std_claim(ofw_t ofw, void *virt, size_t size, u_int align)
{
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_std_release(ofw_t ofw, void *virt, size_t size)
{
struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t virt;
cell_t size;
} args = {
(cell_t)"release",
2,
0,
};
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_std_enter(ofw_t ofw)
{
struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
} args = {
(cell_t)"enter",
0,
0,
};
openfirmware(&args);
/* We may come back. */
}
/* Shut down and drop back to the Open Firmware interface. */
static void
ofw_std_exit(ofw_t ofw)
{
struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
} args = {
(cell_t)"exit",
0,
0,
};
openfirmware(&args);
for (;;) /* just in case */
;
}