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/* $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/boot/ofw/libofw/openfirm.c 215577 2010-11-20 19:23:16Z andreast $");
#include <machine/stdarg.h>
#include <stand.h>
#include "openfirm.h"
int (*openfirmware)(void *);
phandle_t chosen;
ihandle_t mmu;
ihandle_t memory;
int real_mode = 0;
/* Initialiser */
void
OF_init(int (*openfirm)(void *))
{
phandle_t options;
char mode[sizeof("true")];
openfirmware = openfirm;
if ((chosen = OF_finddevice("/chosen")) == -1)
OF_exit();
if (OF_getprop(chosen, "memory", &memory, sizeof(memory)) == -1) {
memory = OF_open("/memory");
if (memory == -1)
memory = OF_open("/memory@0");
if (memory == -1)
OF_exit();
}
if (OF_getprop(chosen, "mmu", &mmu, sizeof(mmu)) == -1)
OF_exit();
/*
* Check if we run in real mode. If so, we do not need to map
* memory later on.
*/
options = OF_finddevice("/options");
if (OF_getprop(options, "real-mode?", mode, sizeof(mode)) > 0 &&
strcmp(mode, "true") == 0)
real_mode = 1;
}
/*
* Generic functions
*/
/* Test to see if a service exists. */
int
OF_test(char *name)
{
static 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);
}
/* Return firmware millisecond count. */
int
OF_milliseconds()
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t ms;
} args = {
(cell_t)"milliseconds",
0,
1,
};
openfirmware(&args);
return (args.ms);
}
/*
* Device tree functions
*/
/* Return the next sibling of this node or 0. */
phandle_t
OF_peer(phandle_t node)
{
static 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. */
phandle_t
OF_child(phandle_t node)
{
static 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. */
phandle_t
OF_parent(phandle_t node)
{
static 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. */
phandle_t
OF_instance_to_package(ihandle_t instance)
{
static 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. */
int
OF_getproplen(phandle_t package, char *propname)
{
static 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. */
int
OF_getprop(phandle_t package, char *propname, void *buf, int buflen)
{
static 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. */
int
OF_nextprop(phandle_t package, char *previous, char *buf)
{
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,
};
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 */
int
OF_setprop(phandle_t package, char *propname, void *buf, int 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,
};
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. */
int
OF_canon(const char *device, char *buf, int 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,
};
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. */
phandle_t
OF_finddevice(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,
};
args.device = (cell_t)device;
if (openfirmware(&args) == -1)
return (-1);
return (args.package);
}
/* Return the fully qualified pathname corresponding to an instance. */
int
OF_instance_to_path(ihandle_t instance, char *buf, int 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,
};
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. */
int
OF_package_to_path(phandle_t package, char *buf, int 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,
};
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. */
int
OF_call_method(char *method, ihandle_t instance, int nargs, int nreturns, ...)
{
va_list ap;
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;
int n;
if (nargs > 6)
return (-1);
args.nargs = nargs + 2;
args.nreturns = nreturns + 1;
args.method = (cell_t)method;
args.instance = instance;
va_start(ap, nreturns);
for (cp = (cell_t *)(args.args_n_results + (n = nargs)); --n >= 0;)
*--cp = va_arg(ap, cell_t);
if (openfirmware(&args) == -1)
return (-1);
if (args.args_n_results[nargs])
return (args.args_n_results[nargs]);
for (cp = (cell_t *)(args.args_n_results + nargs + (n = args.nreturns));
--n > 0;)
*va_arg(ap, cell_t *) = *--cp;
va_end(ap);
return (0);
}
/*
* Device I/O functions
*/
/* Open an instance for a device. */
ihandle_t
OF_open(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,
};
args.device = (cell_t)device;
if (openfirmware(&args) == -1 || args.instance == 0) {
return (-1);
}
return (args.instance);
}
/* Close an instance. */
void
OF_close(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. */
int
OF_read(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)"read",
3,
1,
};
args.instance = instance;
args.addr = (cell_t)addr;
args.len = len;
#if defined(OPENFIRM_DEBUG)
printf("OF_read: called with instance=%08x, addr=%p, len=%d\n",
args.instance, args.addr, args.len);
#endif
if (openfirmware(&args) == -1)
return (-1);
#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 */
;
}
/* 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