NetBSD-5.0.2/sys/arch/powerpc/powerpc/openfirm.c
/* $NetBSD: openfirm.c,v 1.20 2008/04/08 02:33:03 garbled 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.
*/
#include "opt_multiprocessor.h"
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: openfirm.c,v 1.20 2008/04/08 02:33:03 garbled Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <uvm/uvm_extern.h>
#include <machine/psl.h>
#include <machine/stdarg.h>
#include <dev/ofw/openfirm.h>
char *OF_buf;
void ofw_stack(void);
void ofbcopy(const void *, void *, size_t);
#ifdef MULTIPROCESSOR
void OF_start_cpu(int, u_int, int);
#endif
int
OF_peer(int phandle)
{
static struct {
const char *name;
int nargs;
int nreturns;
int phandle;
int sibling;
} args = {
"peer",
1,
1,
};
ofw_stack();
args.phandle = phandle;
if (openfirmware(&args) == -1)
return 0;
return args.sibling;
}
int
OF_child(int phandle)
{
static struct {
const char *name;
int nargs;
int nreturns;
int phandle;
int child;
} args = {
"child",
1,
1,
};
ofw_stack();
args.phandle = phandle;
if (openfirmware(&args) == -1)
return 0;
return args.child;
}
int
OF_parent(int phandle)
{
static struct {
const char *name;
int nargs;
int nreturns;
int phandle;
int parent;
} args = {
"parent",
1,
1,
};
ofw_stack();
args.phandle = phandle;
if (openfirmware(&args) == -1)
return 0;
return args.parent;
}
int
OF_instance_to_package(int ihandle)
{
static struct {
const char *name;
int nargs;
int nreturns;
int ihandle;
int phandle;
} args = {
"instance-to-package",
1,
1,
};
ofw_stack();
args.ihandle = ihandle;
if (openfirmware(&args) == -1)
return -1;
return args.phandle;
}
int
OF_getproplen(int handle, const char *prop)
{
static struct {
const char *name;
int nargs;
int nreturns;
int phandle;
const char *prop;
int proplen;
} args = {
"getproplen",
2,
1,
};
ofw_stack();
args.phandle = handle;
args.prop = prop;
if (openfirmware(&args) == -1)
return -1;
return args.proplen;
}
int
OF_getprop(int handle, const char *prop, void *buf, int buflen)
{
static struct {
const char *name;
int nargs;
int nreturns;
int phandle;
const char *prop;
void *buf;
int buflen;
int size;
} args = {
"getprop",
4,
1,
};
ofw_stack();
if (buflen > PAGE_SIZE)
return -1;
args.phandle = handle;
args.prop = prop;
args.buf = OF_buf;
args.buflen = buflen;
if (openfirmware(&args) == -1)
return -1;
if (args.size > buflen)
args.size = buflen;
if (args.size > 0)
ofbcopy(OF_buf, buf, args.size);
return args.size;
}
int
OF_setprop(int handle, const char *prop, const void *buf, int buflen)
{
struct {
const char *name;
int nargs;
int nreturns;
int phandle;
const char *prop;
const void *buf;
int buflen;
int size;
} args = {
"setprop",
4,
1
};
ofw_stack();
if (buflen > NBPG)
return -1;
ofbcopy(buf, OF_buf, buflen);
args.phandle = handle;
args.prop = prop;
args.buf = OF_buf;
args.buflen = buflen;
if (openfirmware(&args) == -1)
return -1;
return args.size;
}
int
OF_nextprop(int handle, const char *prop, void *nextprop)
{
static struct {
const char *name;
int nargs;
int nreturns;
int phandle;
const char *prop;
char *buf;
int flag;
} args = {
"nextprop",
3,
1,
};
ofw_stack();
args.phandle = handle;
args.prop = prop;
args.buf = OF_buf;
if (openfirmware(&args) == -1)
return -1;
strncpy(nextprop, OF_buf, 32);
return args.flag;
}
int
OF_finddevice(const char *name)
{
static struct {
const char *name;
int nargs;
int nreturns;
const char *device;
int phandle;
} args = {
"finddevice",
1,
1,
};
ofw_stack();
args.device = name;
if (openfirmware(&args) == -1)
return -1;
return args.phandle;
}
int
OF_instance_to_path(int ihandle, char *buf, int buflen)
{
static struct {
const char *name;
int nargs;
int nreturns;
int ihandle;
char *buf;
int buflen;
int length;
} args = {
"instance-to-path",
3,
1,
};
if (buflen > PAGE_SIZE)
return -1;
args.ihandle = ihandle;
args.buf = OF_buf;
args.buflen = buflen;
if (openfirmware(&args) < 0)
return -1;
if (args.length > buflen)
args.length = buflen;
if (args.length > 0)
ofbcopy(OF_buf, buf, args.length);
return args.length;
}
int
OF_package_to_path(int phandle, char *buf, int buflen)
{
static struct {
const char *name;
int nargs;
int nreturns;
int phandle;
char *buf;
int buflen;
int length;
} args = {
"package-to-path",
3,
1,
};
ofw_stack();
if (buflen > PAGE_SIZE)
return -1;
args.phandle = phandle;
args.buf = OF_buf;
args.buflen = buflen;
if (openfirmware(&args) < 0)
return -1;
if (args.length > buflen)
args.length = buflen;
if (args.length > 0)
ofbcopy(OF_buf, buf, args.length);
return args.length;
}
int
OF_call_method(const char *method, int ihandle, int nargs, int nreturns, ...)
{
va_list ap;
static struct {
const char *name;
int nargs;
int nreturns;
const char *method;
int ihandle;
int args_n_results[12];
} args = {
"call-method",
2,
1,
};
int *ip, n;
if (nargs > 6)
return -1;
args.nargs = nargs + 2;
args.nreturns = nreturns + 1;
args.method = method;
args.ihandle = ihandle;
va_start(ap, nreturns);
for (ip = args.args_n_results + (n = nargs); --n >= 0;)
*--ip = va_arg(ap, int);
ofw_stack();
if (openfirmware(&args) == -1) {
va_end(ap);
return -1;
}
if (args.args_n_results[nargs]) {
va_end(ap);
return args.args_n_results[nargs];
}
for (ip = args.args_n_results + nargs + (n = args.nreturns); --n > 0;)
*va_arg(ap, int *) = *--ip;
va_end(ap);
return 0;
}
int
OF_call_method_1(const char *method, int ihandle, int nargs, ...)
{
va_list ap;
static struct {
const char *name;
int nargs;
int nreturns;
const char *method;
int ihandle;
int args_n_results[8];
} args = {
"call-method",
2,
2,
};
int *ip, n;
if (nargs > 6)
return -1;
args.nargs = nargs + 2;
args.method = method;
args.ihandle = ihandle;
va_start(ap, nargs);
for (ip = args.args_n_results + (n = nargs); --n >= 0;)
*--ip = va_arg(ap, int);
va_end(ap);
ofw_stack();
if (openfirmware(&args) == -1)
return -1;
if (args.args_n_results[nargs])
return -1;
return args.args_n_results[nargs + 1];
}
int
OF_open(const char *dname)
{
static struct {
const char *name;
int nargs;
int nreturns;
const char *dname;
int handle;
} args = {
"open",
1,
1,
};
int l;
ofw_stack();
if ((l = strlen(dname)) >= PAGE_SIZE)
return -1;
ofbcopy(dname, OF_buf, l + 1);
args.dname = OF_buf;
if (openfirmware(&args) == -1)
return -1;
return args.handle;
}
void
OF_close(int handle)
{
static struct {
const char *name;
int nargs;
int nreturns;
int handle;
} args = {
"close",
1,
0,
};
ofw_stack();
args.handle = handle;
openfirmware(&args);
}
/*
* This assumes that character devices don't read in multiples of PAGE_SIZE.
*/
int
OF_read(int handle, void *addr, int len)
{
static struct {
const char *name;
int nargs;
int nreturns;
int ihandle;
void *addr;
int len;
int actual;
} args = {
"read",
3,
1,
};
int l, act = 0;
char *p = addr;
ofw_stack();
args.ihandle = handle;
args.addr = OF_buf;
for (; len > 0; len -= l, p += l) {
l = min(PAGE_SIZE, len);
args.len = l;
if (openfirmware(&args) == -1)
return -1;
if (args.actual > 0) {
ofbcopy(OF_buf, p, args.actual);
act += args.actual;
}
if (args.actual < l) {
if (act)
return act;
else
return args.actual;
}
}
return act;
}
int
OF_write(int handle, const void *addr, int len)
{
static struct {
const char *name;
int nargs;
int nreturns;
int ihandle;
void *addr;
int len;
int actual;
} args = {
"write",
3,
1,
};
int l, act = 0;
const char *p = addr;
ofw_stack();
args.ihandle = handle;
args.addr = OF_buf;
for (; len > 0; len -= l, p += l) {
l = min(PAGE_SIZE, len);
ofbcopy(p, OF_buf, l);
args.len = l;
args.actual = l; /* work around a PIBS bug */
if (openfirmware(&args) == -1)
return -1;
l = args.actual;
act += l;
}
return act;
}
int
OF_seek(int handle, u_quad_t pos)
{
static struct {
const char *name;
int nargs;
int nreturns;
int handle;
int poshi;
int poslo;
int status;
} args = {
"seek",
3,
1,
};
ofw_stack();
args.handle = handle;
args.poshi = (int)(pos >> 32);
args.poslo = (int)pos;
if (openfirmware(&args) == -1)
return -1;
return args.status;
}
#ifdef MULTIPROCESSOR
void
OF_start_cpu(int phandle, u_int pc, int arg)
{
static struct {
const char *name;
int nargs;
int nreturns;
int phandle;
u_int pc;
int arg;
} args = {
"start-cpu",
3,
0,
};
ofw_stack();
args.phandle = phandle;
args.pc = pc;
args.arg = arg;
if (openfirmware(&args) == -1)
panic("WTF?");
}
#endif
void
OF_boot(const char *bootspec)
{
static struct {
const char *name;
int nargs;
int nreturns;
char *bootspec;
} args = {
"boot",
1,
0,
};
int l;
if ((l = strlen(bootspec)) >= PAGE_SIZE)
panic("OF_boot");
ofw_stack();
ofbcopy(bootspec, OF_buf, l + 1);
args.bootspec = OF_buf;
openfirmware(&args);
while (1); /* just in case */
}
void
OF_enter(void)
{
static struct {
const char *name;
int nargs;
int nreturns;
} args = {
"enter",
0,
0,
};
ofw_stack();
openfirmware(&args);
}
void
OF_exit(void)
{
static struct {
const char *name;
int nargs;
int nreturns;
} args = {
"exit",
0,
0,
};
ofw_stack();
openfirmware(&args);
while (1); /* just in case */
}
void
(*OF_set_callback (void (*newfunc)(void *))) (void *)
{
static struct {
const char *name;
int nargs;
int nreturns;
void (*newfunc)(void *);
void (*oldfunc)(void *);
} args = {
"set-callback",
1,
1,
};
ofw_stack();
args.newfunc = newfunc;
if (openfirmware(&args) == -1)
return 0;
return args.oldfunc;
}
int
OF_interpret(const char *cmd, int nargs, int nreturns, ...)
{
va_list ap;
int i, len, status;
static struct {
const char *name;
uint32_t nargs;
uint32_t nreturns;
uint32_t slots[16];
} args = {
"interpret",
1,
2,
};
ofw_stack();
if (nreturns > 8)
return -1;
if ((len = strlen(cmd)) >= PAGE_SIZE)
return -1;
ofbcopy(cmd, OF_buf, len + 1);
i = 0;
args.slots[i] = (uint32_t)OF_buf;
args.nargs = nargs + 1;
args.nreturns = nreturns + 1;
va_start(ap, nreturns);
i++;
while (i < args.nargs) {
args.slots[i] = (uint32_t)va_arg(ap, uint32_t *);
i++;
}
if (openfirmware(&args) == -1)
return -1;
status = args.slots[i];
i++;
while (i < args.nargs + args.nreturns) {
*va_arg(ap, uint32_t *) = args.slots[i];
i++;
}
va_end(ap);
return status;
}
/*
* This version of bcopy doesn't work for overlapping regions!
*/
void
ofbcopy(const void *src, void *dst, size_t len)
{
const char *sp = src;
char *dp = dst;
if (src == dst)
return;
/*
* Do some optimization? XXX
*/
while (len-- > 0)
*dp++ = *sp++;
}