#include <machine/rtems-bsd-kernel-space.h>
/* $NetBSD: Locore.c,v 1.7 2000/08/20 07:04:59 tsubai Exp $ */
/*-
* SPDX-License-Identifier: BSD-4-Clause
*
* 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("$FreeBSD$");
#include <rtems/bsd/local/opt_platform.h>
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/queue.h>
#include <sys/systm.h>
#include <sys/endian.h>
#include <machine/stdarg.h>
#include <dev/ofw/ofwvar.h>
#include <dev/ofw/openfirm.h>
#include <rtems/bsd/local/ofw_if.h>
static void OF_putchar(int c, void *arg);
MALLOC_DEFINE(M_OFWPROP, "openfirm", "Open Firmware properties");
static ihandle_t stdout;
#ifndef __rtems__
static ofw_def_t *ofw_def_impl = NULL;
#else /* __rtems__ */
#define ofw_def_impl (&ofw_fdt)
#endif /* __rtems__ */
static ofw_t ofw_obj;
static struct ofw_kobj ofw_kernel_obj;
static struct kobj_ops ofw_kernel_kops;
struct xrefinfo {
phandle_t xref;
phandle_t node;
device_t dev;
SLIST_ENTRY(xrefinfo) next_entry;
};
static SLIST_HEAD(, xrefinfo) xreflist = SLIST_HEAD_INITIALIZER(xreflist);
static struct mtx xreflist_lock;
static boolean_t xref_init_done;
#define FIND_BY_XREF 0
#define FIND_BY_NODE 1
#define FIND_BY_DEV 2
/*
* xref-phandle-device lookup helper routines.
*
* As soon as we are able to use malloc(), walk the node tree and build a list
* of info that cross-references node handles, xref handles, and device_t
* instances. This list exists primarily to allow association of a device_t
* with an xref handle, but it is also used to speed up translation between xref
* and node handles. Before malloc() is available we have to recursively search
* the node tree each time we want to translate between a node and xref handle.
* Afterwards we can do the translations by searching this much shorter list.
*/
static void
xrefinfo_create(phandle_t node)
{
struct xrefinfo * xi;
phandle_t child, xref;
/*
* Recursively descend from parent, looking for nodes with a property
* named either "phandle", "ibm,phandle", or "linux,phandle". For each
* such node found create an entry in the xreflist.
*/
for (child = OF_child(node); child != 0; child = OF_peer(child)) {
xrefinfo_create(child);
if (OF_getencprop(child, "phandle", &xref, sizeof(xref)) ==
-1 && OF_getencprop(child, "ibm,phandle", &xref,
sizeof(xref)) == -1 && OF_getencprop(child,
"linux,phandle", &xref, sizeof(xref)) == -1)
continue;
xi = malloc(sizeof(*xi), M_OFWPROP, M_WAITOK | M_ZERO);
xi->node = child;
xi->xref = xref;
SLIST_INSERT_HEAD(&xreflist, xi, next_entry);
}
}
static void
xrefinfo_init(void *unsed)
{
#ifdef __rtems__
if (OF_init(__DECONST(void *, bsp_fdt_get())) != 0)
return (ENXIO);
#endif /* __rtems__ */
/*
* There is no locking during this init because it runs much earlier
* than any of the clients/consumers of the xref list data, but we do
* initialize the mutex that will be used for access later.
*/
mtx_init(&xreflist_lock, "OF xreflist lock", NULL, MTX_DEF);
xrefinfo_create(OF_peer(0));
xref_init_done = true;
}
SYSINIT(xrefinfo, SI_SUB_KMEM, SI_ORDER_ANY, xrefinfo_init, NULL);
static struct xrefinfo *
xrefinfo_find(uintptr_t key, int find_by)
{
struct xrefinfo *rv, *xi;
rv = NULL;
mtx_lock(&xreflist_lock);
SLIST_FOREACH(xi, &xreflist, next_entry) {
if ((find_by == FIND_BY_XREF && (phandle_t)key == xi->xref) ||
(find_by == FIND_BY_NODE && (phandle_t)key == xi->node) ||
(find_by == FIND_BY_DEV && key == (uintptr_t)xi->dev)) {
rv = xi;
break;
}
}
mtx_unlock(&xreflist_lock);
return (rv);
}
static struct xrefinfo *
xrefinfo_add(phandle_t node, phandle_t xref, device_t dev)
{
struct xrefinfo *xi;
xi = malloc(sizeof(*xi), M_OFWPROP, M_WAITOK);
xi->node = node;
xi->xref = xref;
xi->dev = dev;
mtx_lock(&xreflist_lock);
SLIST_INSERT_HEAD(&xreflist, xi, next_entry);
mtx_unlock(&xreflist_lock);
return (xi);
}
/*
* OFW install routines. Highest priority wins, equal priority also
* overrides allowing last-set to win.
*/
SET_DECLARE(ofw_set, ofw_def_t);
boolean_t
OF_install(char *name, int prio)
{
#ifndef __rtems__
ofw_def_t *ofwp, **ofwpp;
static int curr_prio = 0;
/* Allow OF layer to be uninstalled */
if (name == NULL) {
ofw_def_impl = NULL;
return (FALSE);
}
/*
* Try and locate the OFW kobj corresponding to the name.
*/
SET_FOREACH(ofwpp, ofw_set) {
ofwp = *ofwpp;
if (ofwp->name &&
!strcmp(ofwp->name, name) &&
prio >= curr_prio) {
curr_prio = prio;
ofw_def_impl = ofwp;
return (TRUE);
}
}
return (FALSE);
#else /* __rtems__ */
return (TRUE);
#endif /* __rtems__ */
}
/* Initializer */
int
OF_init(void *cookie)
{
phandle_t chosen;
int rv;
if (ofw_def_impl == NULL)
return (-1);
ofw_obj = &ofw_kernel_obj;
/*
* Take care of compiling the selected class, and
* then statically initialize the OFW object.
*/
kobj_class_compile_static(ofw_def_impl, &ofw_kernel_kops);
kobj_init_static((kobj_t)ofw_obj, ofw_def_impl);
rv = OFW_INIT(ofw_obj, cookie);
if ((chosen = OF_finddevice("/chosen")) != -1)
if (OF_getencprop(chosen, "stdout", &stdout,
sizeof(stdout)) == -1)
stdout = -1;
return (rv);
}
static void
OF_putchar(int c, void *arg __unused)
{
char cbuf;
if (c == '\n') {
cbuf = '\r';
OF_write(stdout, &cbuf, 1);
}
cbuf = c;
OF_write(stdout, &cbuf, 1);
}
void
OF_printf(const char *fmt, ...)
{
va_list va;
va_start(va, fmt);
(void)kvprintf(fmt, OF_putchar, NULL, 10, va);
va_end(va);
}
/*
* Generic functions
*/
/* Test to see if a service exists. */
int
OF_test(const char *name)
{
if (ofw_def_impl == NULL)
return (-1);
return (OFW_TEST(ofw_obj, name));
}
int
OF_interpret(const char *cmd, int nreturns, ...)
{
va_list ap;
cell_t slots[16];
int i = 0;
int status;
if (ofw_def_impl == NULL)
return (-1);
status = OFW_INTERPRET(ofw_obj, cmd, nreturns, slots);
if (status == -1)
return (status);
va_start(ap, nreturns);
while (i < nreturns)
*va_arg(ap, cell_t *) = slots[i++];
va_end(ap);
return (status);
}
/*
* Device tree functions
*/
/* Return the next sibling of this node or 0. */
phandle_t
OF_peer(phandle_t node)
{
if (ofw_def_impl == NULL)
return (0);
return (OFW_PEER(ofw_obj, node));
}
/* Return the first child of this node or 0. */
phandle_t
OF_child(phandle_t node)
{
if (ofw_def_impl == NULL)
return (0);
return (OFW_CHILD(ofw_obj, node));
}
/* Return the parent of this node or 0. */
phandle_t
OF_parent(phandle_t node)
{
if (ofw_def_impl == NULL)
return (0);
return (OFW_PARENT(ofw_obj, node));
}
/* Return the package handle that corresponds to an instance handle. */
phandle_t
OF_instance_to_package(ihandle_t instance)
{
if (ofw_def_impl == NULL)
return (-1);
return (OFW_INSTANCE_TO_PACKAGE(ofw_obj, instance));
}
/* Get the length of a property of a package. */
ssize_t
OF_getproplen(phandle_t package, const char *propname)
{
if (ofw_def_impl == NULL)
return (-1);
return (OFW_GETPROPLEN(ofw_obj, package, propname));
}
/* Check existence of a property of a package. */
int
OF_hasprop(phandle_t package, const char *propname)
{
return (OF_getproplen(package, propname) >= 0 ? 1 : 0);
}
/* Get the value of a property of a package. */
ssize_t
OF_getprop(phandle_t package, const char *propname, void *buf, size_t buflen)
{
if (ofw_def_impl == NULL)
return (-1);
return (OFW_GETPROP(ofw_obj, package, propname, buf, buflen));
}
ssize_t
OF_getencprop(phandle_t node, const char *propname, pcell_t *buf, size_t len)
{
ssize_t retval;
int i;
KASSERT(len % 4 == 0, ("Need a multiple of 4 bytes"));
retval = OF_getprop(node, propname, buf, len);
if (retval <= 0)
return (retval);
for (i = 0; i < len/4; i++)
buf[i] = be32toh(buf[i]);
return (retval);
}
/*
* Recursively search the node and its parent for the given property, working
* downward from the node to the device tree root. Returns the value of the
* first match.
*/
ssize_t
OF_searchprop(phandle_t node, const char *propname, void *buf, size_t len)
{
ssize_t rv;
for (; node != 0; node = OF_parent(node))
if ((rv = OF_getprop(node, propname, buf, len)) != -1)
return (rv);
return (-1);
}
ssize_t
OF_searchencprop(phandle_t node, const char *propname, pcell_t *buf, size_t len)
{
ssize_t rv;
for (; node != 0; node = OF_parent(node))
if ((rv = OF_getencprop(node, propname, buf, len)) != -1)
return (rv);
return (-1);
}
/*
* Store the value of a property of a package into newly allocated memory
* (using the M_OFWPROP malloc pool and M_WAITOK).
*/
ssize_t
OF_getprop_alloc(phandle_t package, const char *propname, void **buf)
{
int len;
*buf = NULL;
if ((len = OF_getproplen(package, propname)) == -1)
return (-1);
if (len > 0) {
*buf = malloc(len, M_OFWPROP, M_WAITOK);
if (OF_getprop(package, propname, *buf, len) == -1) {
free(*buf, M_OFWPROP);
*buf = NULL;
return (-1);
}
}
return (len);
}
/*
* Store the value of a property of a package into newly allocated memory
* (using the M_OFWPROP malloc pool and M_WAITOK). elsz is the size of a
* single element, the number of elements is return in number.
*/
ssize_t
OF_getprop_alloc_multi(phandle_t package, const char *propname, int elsz, void **buf)
{
int len;
*buf = NULL;
if ((len = OF_getproplen(package, propname)) == -1 ||
len % elsz != 0)
return (-1);
if (len > 0) {
*buf = malloc(len, M_OFWPROP, M_WAITOK);
if (OF_getprop(package, propname, *buf, len) == -1) {
free(*buf, M_OFWPROP);
*buf = NULL;
return (-1);
}
}
return (len / elsz);
}
ssize_t
OF_getencprop_alloc(phandle_t package, const char *name, void **buf)
{
ssize_t ret;
ret = OF_getencprop_alloc_multi(package, name, sizeof(pcell_t),
buf);
if (ret < 0)
return (ret);
else
return (ret * sizeof(pcell_t));
}
ssize_t
OF_getencprop_alloc_multi(phandle_t package, const char *name, int elsz,
void **buf)
{
ssize_t retval;
pcell_t *cell;
int i;
retval = OF_getprop_alloc_multi(package, name, elsz, buf);
if (retval == -1)
return (-1);
cell = *buf;
for (i = 0; i < retval * elsz / 4; i++)
cell[i] = be32toh(cell[i]);
return (retval);
}
/* Free buffer allocated by OF_getencprop_alloc or OF_getprop_alloc */
void OF_prop_free(void *buf)
{
free(buf, M_OFWPROP);
}
/* Get the next property of a package. */
int
OF_nextprop(phandle_t package, const char *previous, char *buf, size_t size)
{
if (ofw_def_impl == NULL)
return (-1);
return (OFW_NEXTPROP(ofw_obj, package, previous, buf, size));
}
/* Set the value of a property of a package. */
int
OF_setprop(phandle_t package, const char *propname, const void *buf, size_t len)
{
if (ofw_def_impl == NULL)
return (-1);
return (OFW_SETPROP(ofw_obj, package, propname, buf,len));
}
/* Convert a device specifier to a fully qualified pathname. */
ssize_t
OF_canon(const char *device, char *buf, size_t len)
{
if (ofw_def_impl == NULL)
return (-1);
return (OFW_CANON(ofw_obj, device, buf, len));
}
/* Return a package handle for the specified device. */
phandle_t
OF_finddevice(const char *device)
{
if (ofw_def_impl == NULL)
return (-1);
return (OFW_FINDDEVICE(ofw_obj, device));
}
/* Return the fully qualified pathname corresponding to an instance. */
ssize_t
OF_instance_to_path(ihandle_t instance, char *buf, size_t len)
{
if (ofw_def_impl == NULL)
return (-1);
return (OFW_INSTANCE_TO_PATH(ofw_obj, instance, buf, len));
}
/* Return the fully qualified pathname corresponding to a package. */
ssize_t
OF_package_to_path(phandle_t package, char *buf, size_t len)
{
if (ofw_def_impl == NULL)
return (-1);
return (OFW_PACKAGE_TO_PATH(ofw_obj, package, buf, len));
}
/* Look up effective phandle (see FDT/PAPR spec) */
static phandle_t
OF_child_xref_phandle(phandle_t parent, phandle_t xref)
{
phandle_t child, rxref;
/*
* Recursively descend from parent, looking for a node with a property
* named either "phandle", "ibm,phandle", or "linux,phandle" that
* matches the xref we are looking for.
*/
for (child = OF_child(parent); child != 0; child = OF_peer(child)) {
rxref = OF_child_xref_phandle(child, xref);
if (rxref != -1)
return (rxref);
if (OF_getencprop(child, "phandle", &rxref, sizeof(rxref)) ==
-1 && OF_getencprop(child, "ibm,phandle", &rxref,
sizeof(rxref)) == -1 && OF_getencprop(child,
"linux,phandle", &rxref, sizeof(rxref)) == -1)
continue;
if (rxref == xref)
return (child);
}
return (-1);
}
phandle_t
OF_node_from_xref(phandle_t xref)
{
struct xrefinfo *xi;
phandle_t node;
if (xref_init_done) {
if ((xi = xrefinfo_find(xref, FIND_BY_XREF)) == NULL)
return (xref);
return (xi->node);
}
if ((node = OF_child_xref_phandle(OF_peer(0), xref)) == -1)
return (xref);
return (node);
}
phandle_t
OF_xref_from_node(phandle_t node)
{
struct xrefinfo *xi;
phandle_t xref;
if (xref_init_done) {
if ((xi = xrefinfo_find(node, FIND_BY_NODE)) == NULL)
return (node);
return (xi->xref);
}
if (OF_getencprop(node, "phandle", &xref, sizeof(xref)) == -1 &&
OF_getencprop(node, "ibm,phandle", &xref, sizeof(xref)) == -1 &&
OF_getencprop(node, "linux,phandle", &xref, sizeof(xref)) == -1)
return (node);
return (xref);
}
device_t
OF_device_from_xref(phandle_t xref)
{
struct xrefinfo *xi;
if (xref_init_done) {
if ((xi = xrefinfo_find(xref, FIND_BY_XREF)) == NULL)
return (NULL);
return (xi->dev);
}
panic("Attempt to find device before xreflist_init");
}
phandle_t
OF_xref_from_device(device_t dev)
{
struct xrefinfo *xi;
if (xref_init_done) {
if ((xi = xrefinfo_find((uintptr_t)dev, FIND_BY_DEV)) == NULL)
return (0);
return (xi->xref);
}
panic("Attempt to find xref before xreflist_init");
}
int
OF_device_register_xref(phandle_t xref, device_t dev)
{
struct xrefinfo *xi;
/*
* If the given xref handle doesn't already exist in the list then we
* add a list entry. In theory this can only happen on a system where
* nodes don't contain phandle properties and xref and node handles are
* synonymous, so the xref handle is added as the node handle as well.
*/
if (xref_init_done) {
if ((xi = xrefinfo_find(xref, FIND_BY_XREF)) == NULL)
xrefinfo_add(xref, xref, dev);
else
xi->dev = dev;
return (0);
}
panic("Attempt to register device before xreflist_init");
}
/* Call the method in the scope of a given instance. */
int
OF_call_method(const char *method, ihandle_t instance, int nargs, int nreturns,
...)
{
va_list ap;
cell_t args_n_results[12];
int n, status;
if (nargs > 6 || ofw_def_impl == NULL)
return (-1);
va_start(ap, nreturns);
for (n = 0; n < nargs; n++)
args_n_results[n] = va_arg(ap, cell_t);
status = OFW_CALL_METHOD(ofw_obj, instance, method, nargs, nreturns,
args_n_results);
if (status != 0)
return (status);
for (; n < nargs + nreturns; n++)
*va_arg(ap, cell_t *) = args_n_results[n];
va_end(ap);
return (0);
}
/*
* Device I/O functions
*/
/* Open an instance for a device. */
ihandle_t
OF_open(const char *device)
{
if (ofw_def_impl == NULL)
return (0);
return (OFW_OPEN(ofw_obj, device));
}
/* Close an instance. */
void
OF_close(ihandle_t instance)
{
if (ofw_def_impl == NULL)
return;
OFW_CLOSE(ofw_obj, instance);
}
/* Read from an instance. */
ssize_t
OF_read(ihandle_t instance, void *addr, size_t len)
{
if (ofw_def_impl == NULL)
return (-1);
return (OFW_READ(ofw_obj, instance, addr, len));
}
/* Write to an instance. */
ssize_t
OF_write(ihandle_t instance, const void *addr, size_t len)
{
if (ofw_def_impl == NULL)
return (-1);
return (OFW_WRITE(ofw_obj, instance, addr, len));
}
/* Seek to a position. */
int
OF_seek(ihandle_t instance, uint64_t pos)
{
if (ofw_def_impl == NULL)
return (-1);
return (OFW_SEEK(ofw_obj, instance, pos));
}
/*
* Memory functions
*/
/* Claim an area of memory. */
void *
OF_claim(void *virt, size_t size, u_int align)
{
if (ofw_def_impl == NULL)
return ((void *)-1);
return (OFW_CLAIM(ofw_obj, virt, size, align));
}
/* Release an area of memory. */
void
OF_release(void *virt, size_t size)
{
if (ofw_def_impl == NULL)
return;
OFW_RELEASE(ofw_obj, virt, size);
}
/*
* Control transfer functions
*/
/* Suspend and drop back to the Open Firmware interface. */
void
OF_enter()
{
if (ofw_def_impl == NULL)
return;
OFW_ENTER(ofw_obj);
}
/* Shut down and drop back to the Open Firmware interface. */
void
OF_exit()
{
if (ofw_def_impl == NULL)
panic("OF_exit: Open Firmware not available");
/* Should not return */
OFW_EXIT(ofw_obj);
for (;;) /* just in case */
;
}
