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binutils-gdb/sim/ppc/emul_chirp.c
Michael Meissner 5c04f4f7fc January 23rd merge
1997-01-27 21:34:50 +00:00

2008 lines
56 KiB
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/* This file is part of the program psim.
Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef _EMUL_CHIRP_C_
#define _EMUL_CHIRP_C_
/* Note: this module is called via a table. There is no benefit in
making it inline */
#include "emul_generic.h"
#include "emul_chirp.h"
#ifdef HAVE_STRING_H
#include <string.h>
#else
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#endif
#include <unistd.h>
#ifndef STATIC_INLINE_EMUL_CHIRP
#define STATIC_INLINE_EMUL_CHIRP STATIC_INLINE
#endif
/* EMULATION
OpenFirmware - IEEE Standard for Boot (Initialization
Configuration) Firmware.
DESCRIPTION
BUGS
This code assumes that the memory node has #address-cells and
#size-cells set to one. For future implementations, this may not
be the case.
*/
/* Descriptor of the open boot services being emulated */
typedef int (chirp_handler)
(os_emul_data *data,
cpu *processor,
unsigned_word cia);
typedef struct _chirp_services {
const char *name;
chirp_handler *handler;
} chirp_services;
/* The OpenBoot emulation is, at any time either waiting for a client
request or waiting on a client callback */
typedef enum {
serving,
emulating,
faulting,
} chirp_emul_state;
struct _os_emul_data {
chirp_emul_state state;
unsigned_word return_address;
unsigned_word arguments;
unsigned_word n_args;
unsigned_word n_returns;
chirp_services *service;
device *root;
chirp_services *services;
/* configuration */
unsigned_word memory_size;
unsigned_word real_base;
unsigned_word real_size;
unsigned_word virt_base;
unsigned_word virt_size;
int real_mode;
int little_endian;
int floating_point_available;
int interrupt_prefix;
unsigned_word load_base;
/* hash table */
unsigned_word nr_page_table_entry_groups;
unsigned_word htab_offset;
unsigned_word htab_ra;
unsigned_word htab_va;
unsigned_word sizeof_htab;
/* virtual address of htab */
unsigned_word stack_offset;
unsigned_word stack_ra;
unsigned_word stack_va;
unsigned_word sizeof_stack;
/* addresses of emulation instructions virtual/real */
unsigned_word code_offset;
unsigned_word code_va;
unsigned_word code_ra;
unsigned_word sizeof_code;
unsigned_word code_client_va;
unsigned_word code_client_ra;
unsigned_word code_callback_va;
unsigned_word code_callback_ra;
unsigned_word code_loop_va;
unsigned_word code_loop_ra;
};
/* returns the name of the corresponding Ihandle */
static const char *
ihandle_name(device_instance *ihandle)
{
if (ihandle == NULL)
return "";
else
return device_name(device_instance_device(ihandle));
}
/* Read/write the argument list making certain that all values are
converted to/from host byte order.
In the below only n_args+n_returns is read/written */
static int
chirp_read_t2h_args(void *args,
int sizeof_args,
int n_args,
int n_returns,
os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
unsigned_cell *words;
int i;
/* check against the number of arguments specified by the client
program */
if ((n_args >= 0 && data->n_args != n_args)
|| (n_returns >= 0 && data->n_returns != n_returns)) {
TRACE(trace_os_emul, ("%s - invalid nr of args - n_args=%ld, n_returns=%ld\n",
data->service->name,
(long)data->n_args,
(long)data->n_returns));
return -1;
}
/* check that there is enough space */
if (sizeof(unsigned_cell) * (data->n_args + data->n_returns) > sizeof_args)
return -1;
/* bring in the data */
memset(args, 0, sizeof_args);
emul_read_buffer(args, data->arguments + 3 * sizeof(unsigned_cell),
sizeof(unsigned_cell) * (data->n_args + data->n_returns),
processor, cia);
/* convert all words to host format */
words = args;
for (i = 0; i < (sizeof_args / sizeof(unsigned_cell)); i++)
words[i] = T2H_cell(words[i]);
return 0;
}
static void
chirp_write_h2t_args(void *args,
int sizeof_args,
os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
int i;
unsigned_cell *words;
/* convert to target everything */
words = args;
for (i = 0; i < (sizeof_args / sizeof(unsigned_cell)); i++)
words[i] = H2T_cell(words[i]);
/* bring in the data */
emul_write_buffer(args, data->arguments + 3 * sizeof(unsigned_cell),
sizeof(unsigned_cell) * (data->n_args + data->n_returns),
processor, cia);
}
/* OpenBoot emulation functions */
/* client interface */
static int
chirp_emul_test(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
struct test_args {
/*in*/
unsigned_cell name; /*string*/
/*out*/
unsigned_cell missing;
} args;
char name[32];
chirp_services *service = NULL;
/* read in the arguments */
if (chirp_read_t2h_args(&args, sizeof(args), 1, 1, data, processor, cia))
return -1;
emul_read_string(name, args.name, sizeof(name),
processor, cia);
TRACE(trace_os_emul, ("test - in - name=`%s'\n", name));
/* see if we know about the service */
service = data->services;
while (service->name != NULL && strcmp(service->name, name) != 0) {
service++;
}
if (service->name == NULL)
args.missing = -1;
else
args.missing = 0;
/* write the arguments back out */
TRACE(trace_os_emul, ("test - out - missing=%ld\n",
(long)args.missing));
chirp_write_h2t_args(&args,
sizeof(args),
data,
processor, cia);
return 0;
}
/* Device tree */
static int
chirp_emul_peer(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
struct peer_args {
/*in*/
unsigned_cell phandle;
/*out*/
unsigned_cell sibling_phandle;
} args;
device *phandle;
device *sibling_phandle = NULL;
/* read in the arguments */
if (chirp_read_t2h_args(&args, sizeof(args), 1, 1, data, processor, cia))
return -1;
phandle = external_to_device(data->root, args.phandle);
TRACE(trace_os_emul, ("peer - in - phandle=0x%lx(0x%lx`%s')\n",
(unsigned long)args.phandle,
(unsigned long)phandle,
(phandle == NULL ? "" : device_name(phandle))));
/* find the peer */
if (args.phandle == 0) {
sibling_phandle = data->root;
args.sibling_phandle = device_to_external(sibling_phandle);
}
else if (phandle == NULL) {
sibling_phandle = NULL;
args.sibling_phandle = -1;
}
else {
sibling_phandle = device_sibling(phandle);
if (sibling_phandle == NULL)
args.sibling_phandle = 0;
else
args.sibling_phandle = device_to_external(sibling_phandle);
}
/* write the arguments back out */
TRACE(trace_os_emul, ("peer - out - sibling_phandle=0x%lx(0x%lx`%s')\n",
(unsigned long)args.sibling_phandle,
(unsigned long)sibling_phandle,
(sibling_phandle == NULL ? "" : device_name(sibling_phandle))));
chirp_write_h2t_args(&args,
sizeof(args),
data,
processor, cia);
return 0;
}
static int
chirp_emul_child(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
struct child_args {
/*in*/
unsigned_cell phandle;
/*out*/
unsigned_cell child_phandle;
} args;
device *phandle;
device *child_phandle;
/* read the arguments in */
if (chirp_read_t2h_args(&args, sizeof(args), 1, 1, data, processor, cia))
return -1;
phandle = external_to_device(data->root, args.phandle);
TRACE(trace_os_emul, ("child - in - phandle=0x%lx(0x%lx`%s')\n",
(unsigned long)args.phandle,
(unsigned long)phandle,
(phandle == NULL ? "" : device_name(phandle))));
/* find a child */
if (args.phandle == 0
|| phandle == NULL) {
child_phandle = NULL;
args.child_phandle = -1;
}
else {
child_phandle = device_child(phandle);
if (child_phandle == NULL)
args.child_phandle = 0;
else
args.child_phandle = device_to_external(child_phandle);
}
/* write the result out */
TRACE(trace_os_emul, ("child - out - child_phandle=0x%lx(0x%lx`%s')\n",
(unsigned long)args.child_phandle,
(unsigned long)child_phandle,
(child_phandle == NULL ? "" : device_name(child_phandle))));
chirp_write_h2t_args(&args,
sizeof(args),
data,
processor, cia);
return 0;
}
static int
chirp_emul_parent(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
struct parent_args {
/*in*/
unsigned_cell phandle;
/*out*/
unsigned_cell parent_phandle;
} args;
device *phandle;
device *parent_phandle;
/* read the args in */
if (chirp_read_t2h_args(&args, sizeof(args), 1, 1, data, processor, cia))
return -1;
phandle = external_to_device(data->root, args.phandle);
TRACE(trace_os_emul, ("parent - in - phandle=0x%lx(0x%lx`%s')\n",
(unsigned long)args.phandle,
(unsigned long)phandle,
(phandle == NULL ? "" : device_name(phandle))));
/* find a parent */
if (args.phandle == 0
|| phandle == NULL) {
parent_phandle = NULL;
args.parent_phandle = -1;
}
else {
parent_phandle = device_parent(phandle);
if (parent_phandle == NULL)
args.parent_phandle = 0;
else
args.parent_phandle = device_to_external(parent_phandle);
}
/* return the result */
TRACE(trace_os_emul, ("parent - out - parent_phandle=0x%lx(0x%lx`%s')\n",
(unsigned long)args.parent_phandle,
(unsigned long)parent_phandle,
(parent_phandle == NULL ? "" : device_name(parent_phandle))));
chirp_write_h2t_args(&args,
sizeof(args),
data,
processor, cia);
return 0;
}
static int
chirp_emul_instance_to_package(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
struct instance_to_package_args {
/*in*/
unsigned_cell ihandle;
/*out*/
unsigned_cell phandle;
} args;
device_instance *ihandle;
device *phandle = NULL;
/* read the args in */
if (chirp_read_t2h_args(&args, sizeof(args), 1, 1, data, processor, cia))
return -1;
ihandle = external_to_device_instance(data->root, args.ihandle);
TRACE(trace_os_emul, ("instance-to-package - in - ihandle=0x%lx(0x%lx`%s')\n",
(unsigned long)args.ihandle,
(unsigned long)ihandle,
ihandle_name(ihandle)));
/* find the corresponding phandle */
if (ihandle == NULL) {
phandle = NULL;
args.phandle = -1;
}
else {
phandle = device_instance_device(ihandle);
args.phandle = device_to_external(phandle);
}
/* return the result */
TRACE(trace_os_emul, ("instance-to-package - out - phandle=0x%lx(0x%lx`%s')\n",
(unsigned long)args.phandle,
(unsigned long)phandle,
(phandle == NULL ? "" : device_name(phandle))));
chirp_write_h2t_args(&args,
sizeof(args),
data,
processor, cia);
return 0;
}
static int
chirp_emul_getproplen(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
struct getproplen_args {
/*in*/
unsigned_cell phandle;
unsigned_cell name;
/*out*/
unsigned_cell proplen;
} args;
char name[32];
device *phandle;
/* read the args in */
if (chirp_read_t2h_args(&args, sizeof(args), 2, 1, data, processor, cia))
return -1;
phandle = external_to_device(data->root, args.phandle);
emul_read_string(name,
args.name,
sizeof(name),
processor, cia);
TRACE(trace_os_emul, ("getproplen - in - phandle=0x%lx(0x%lx`%s') name=`%s'\n",
(unsigned long)args.phandle,
(unsigned long)phandle,
(phandle == NULL ? "" : device_name(phandle)),
name));
/* find our prop and get its length */
if (args.phandle == 0
|| phandle == NULL) {
args.proplen = -1;
}
else {
const device_property *prop = device_find_property(phandle, name);
if (prop == (device_property*)0) {
args.proplen = -1;
}
else {
args.proplen = prop->sizeof_array;
}
}
/* return the result */
TRACE(trace_os_emul, ("getproplen - out - proplen=%ld\n",
(unsigned long)args.proplen));
chirp_write_h2t_args(&args,
sizeof(args),
data,
processor, cia);
return 0;
}
static int
chirp_emul_getprop(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
struct getprop_args {
/*in*/
unsigned_cell phandle;
unsigned_cell name;
unsigned_cell buf;
unsigned_cell buflen;
/*out*/
unsigned_cell size;
} args;
char name[32];
device *phandle;
/* read in the args, the return is optional */
if (chirp_read_t2h_args(&args, sizeof(args), 4, -1, data, processor, cia))
return -1;
phandle = external_to_device(data->root, args.phandle);
emul_read_string(name,
args.name,
sizeof(name),
processor, cia);
TRACE(trace_os_emul, ("getprop - in - phandle=0x%lx(0x%lx`%s') name=`%s' buf=0x%lx buflen=%ld\n",
(unsigned long)args.phandle,
(unsigned long)phandle,
(phandle == NULL ? "" : device_name(phandle)),
name,
(unsigned long)args.buf,
(unsigned long)args.buflen));
/* get the property */
if (args.phandle == 0
|| phandle == NULL) {
args.size = -1;
}
else {
const device_property *prop = device_find_property(phandle, name);
if (prop == NULL) {
args.size = -1;
}
else {
int size = args.buflen;
if (size > prop->sizeof_array)
size = prop->sizeof_array;
emul_write_buffer(prop->array, args.buf,
size,
processor, cia);
args.size = size;
switch (prop->type) {
case string_property:
TRACE(trace_os_emul, ("getprop - string `%s'\n",
device_find_string_property(phandle, name)));
break;
case ihandle_property:
TRACE(trace_os_emul, ("getprop - ihandle=0x%lx(0x%lx`%s')\n",
BE2H_cell(*(unsigned_cell*)prop->array),
(unsigned long)device_find_ihandle_property(phandle, name),
ihandle_name(device_find_ihandle_property(phandle, name))));
break;
default:
break;
}
}
}
/* write back the result */
if (data->n_returns == 0)
TRACE(trace_os_emul, ("getprop - out - size=%ld (not returned)\n",
(unsigned long)args.size));
else {
TRACE(trace_os_emul, ("getprop - out - size=%ld\n",
(unsigned long)args.size));
chirp_write_h2t_args(&args,
sizeof(args),
data,
processor, cia);
}
return 0;
}
static int
chirp_emul_nextprop(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
struct nextprop_args {
/*in*/
unsigned_cell phandle;
unsigned_cell previous;
unsigned_cell buf;
/*out*/
unsigned_cell flag;
} args;
char previous[32];
device *phandle;
/* read in the args */
if (chirp_read_t2h_args(&args, sizeof(args), 3, 1, data, processor, cia))
return -1;
phandle = external_to_device(data->root, args.phandle);
emul_read_string(previous,
args.previous,
sizeof(previous),
processor, cia);
TRACE(trace_os_emul, ("nextprop - in - phandle=0x%lx(0x%lx`%s') previous=`%s' buf=0x%lx\n",
(unsigned long)args.phandle,
(unsigned long)phandle,
(phandle == NULL ? "" : device_name(phandle)),
previous,
(unsigned long)args.buf));
/* find the next property */
if (args.phandle == 0
|| phandle == NULL) {
args.flag = -1;
}
else {
const device_property *prev_prop = device_find_property(phandle, previous);
if (prev_prop == NULL) {
args.flag = -1; /* name invalid */
}
else {
const device_property *next_prop;
next_prop = device_next_property(prev_prop);
if (next_prop == NULL) {
args.flag = 0; /* last property */
}
else {
emul_write_buffer(next_prop->name, args.buf, strlen(next_prop->name),
processor, cia);
TRACE(trace_os_emul, ("nextprop - name=`%s'\n", next_prop->name));
args.flag = 1; /* worked ok */
}
}
}
/* write back the result */
TRACE(trace_os_emul, ("nextprop - out - flag=%ld\n",
(unsigned long)args.flag));
chirp_write_h2t_args(&args,
sizeof(args),
data,
processor, cia);
return 0;
}
#if 0
static int
chirp_emul_setprop(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
error("chirp: setprop method not implemented\n");
return 0;
}
#endif
static int
chirp_emul_canon(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
struct canon_args {
/*in*/
unsigned_cell device_specifier;
unsigned_cell buf;
unsigned_cell buflen;
/*out*/
unsigned_cell length;
} args;
char device_specifier[1024];
device *phandle;
const char *path;
int length;
/* read in the args */
if (chirp_read_t2h_args(&args, sizeof(args), 3, 1, data, processor, cia))
return -1;
emul_read_string(device_specifier,
args.device_specifier,
sizeof(device_specifier),
processor, cia);
TRACE(trace_os_emul, ("canon - in - device_specifier=`%s' buf=0x%lx buflen=%lx\n",
device_specifier,
(unsigned long)args.buf,
(unsigned long)args.buflen));
/* canon the name */
phandle = tree_find_device(data->root, device_specifier);
if (phandle == NULL) {
length = -1;
path = "";
args.length = -1;
}
else {
path = device_path(phandle);
length = strlen(path);
if (length >= args.buflen)
length = args.buflen - 1;
emul_write_buffer(path, args.buf, length,
processor, cia);
args.length = length;
}
/* write back the result */
TRACE(trace_os_emul, ("canon - out - length=%ld buf=`%s'\n",
(unsigned long)args.length,
path));
chirp_write_h2t_args(&args,
sizeof(args),
data,
processor, cia);
return 0;
}
static int
chirp_emul_finddevice(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
struct finddevice_args {
/*in*/
unsigned_cell device_specifier;
/*out*/
unsigned_cell phandle;
} args;
char device_specifier[1024];
device *phandle;
/* get the args */
if (chirp_read_t2h_args(&args, sizeof(args), 1, 1, data, processor, cia))
return -1;
emul_read_string(device_specifier,
args.device_specifier,
sizeof(device_specifier),
processor, cia);
TRACE(trace_os_emul, ("finddevice - in - device_specifier=`%s'\n",
device_specifier));
/* find the device */
phandle = tree_find_device(data->root, device_specifier);
if (phandle == NULL)
args.phandle = -1;
else
args.phandle = device_to_external(phandle);
/* return its phandle */
TRACE(trace_os_emul, ("finddevice - out - phandle=0x%lx(0x%lx`%s')\n",
(unsigned long)args.phandle,
(unsigned long)phandle,
(phandle == NULL ? "" : device_name(phandle))));
chirp_write_h2t_args(&args,
sizeof(args),
data,
processor, cia);
return 0;
}
static int
chirp_emul_instance_to_path(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
struct instance_to_path_args {
/*in*/
unsigned_cell ihandle;
unsigned_cell buf;
unsigned_cell buflen;
/*out*/
unsigned_cell length;
} args;
device_instance *ihandle;
const char *path;
int length;
/* get the args */
if (chirp_read_t2h_args(&args, sizeof(args), 3, 1, data, processor, cia))
return -1;
ihandle = external_to_device_instance(data->root, args.ihandle);
TRACE(trace_os_emul, ("instance-to-path - in - ihandle=0x%lx(0x%lx`%s') buf=0x%lx buflen=%ld\n",
(unsigned long)args.ihandle,
(unsigned long)ihandle,
ihandle_name(ihandle),
(unsigned long)args.buf,
(unsigned long)args.buflen));
/* get the devices name */
if (ihandle == NULL) {
args.length = -1;
path = "(null)";
}
else {
path = device_instance_path(ihandle);
length = strlen(path);
if (length >= args.buflen)
length = args.buflen - 1;
emul_write_buffer(path, args.buf, length,
processor, cia);
args.length = length;
}
/* return its phandle */
TRACE(trace_os_emul, ("instance-to-path - out - length=%ld buf=`%s')\n",
(unsigned long)args.length,
path));
chirp_write_h2t_args(&args,
sizeof(args),
data,
processor, cia);
return 0;
}
static int
chirp_emul_package_to_path(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
struct package_to_path_args {
/*in*/
unsigned_cell phandle;
unsigned_cell buf;
unsigned_cell buflen;
/*out*/
unsigned_cell length;
} args;
device *phandle;
const char *path;
/* get the args */
if (chirp_read_t2h_args(&args, sizeof(args), 3, 1, data, processor, cia))
return -1;
phandle = external_to_device(data->root, args.phandle);
TRACE(trace_os_emul, ("package-to-path - in - phandle=0x%lx(0x%lx`%s') buf=0x%lx buflen=%ld\n",
(unsigned long)args.phandle,
(unsigned long)phandle,
(phandle == NULL ? "" : device_name(phandle)),
(unsigned long)args.buf,
(unsigned long)args.buflen));
/* get the devices name */
if (phandle == NULL) {
args.length = -1;
path = "(null)";
}
else {
int length;
path = device_path(phandle);
length = strlen(path);
if (length >= args.buflen)
length = args.buflen - 1;
emul_write_buffer(path, args.buf, length,
processor, cia);
args.length = length;
}
/* return its phandle */
TRACE(trace_os_emul, ("package-to-path - out - length=%ld buf=`%s')\n",
(unsigned long)args.length,
path));
chirp_write_h2t_args(&args,
sizeof(args),
data,
processor, cia);
return 0;
}
static int
chirp_emul_call_method(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
struct call_method_args {
/*in*/
unsigned_cell method;
unsigned_cell ihandle;
/*in/out*/
unsigned_cell stack[13]; /*6in + 6out + catch */
} args;
char method[32];
device_instance *ihandle;
/* some useful info about our mini stack */
int n_stack_args;
int n_stack_returns;
int stack_catch_result;
int stack_returns;
/* read the args */
if (chirp_read_t2h_args(&args, sizeof(args), -1, -1, data, processor, cia))
return -1;
emul_read_string(method,
args.method,
sizeof(method),
processor, cia);
ihandle = external_to_device_instance(data->root, args.ihandle);
n_stack_args = data->n_args - 2;
n_stack_returns = data->n_returns - 1;
stack_catch_result = n_stack_args;
stack_returns = stack_catch_result + 1;
TRACE(trace_os_emul, ("call-method - in - n_args=%ld n_returns=%ld method=`%s' ihandle=0x%lx(0x%lx`%s')\n",
(unsigned long)data->n_args,
(unsigned long)data->n_returns,
method,
(unsigned long)args.ihandle,
(unsigned long)ihandle,
ihandle_name(ihandle)));
/* see if we can emulate this method */
if (ihandle == NULL) {
/* OpenFirmware doesn't define this error */
error("chirp: invalid ihandle passed to call-method method");
}
else {
args.stack[stack_catch_result] =
device_instance_call_method(ihandle,
method,
n_stack_args,
&args.stack[0],
n_stack_returns,
&args.stack[stack_returns]);
}
/* finished */
TRACE(trace_os_emul, ("call-method - out - catch-result=%ld\n",
(unsigned long)args.stack[stack_catch_result]));
chirp_write_h2t_args(&args,
sizeof(args),
data,
processor, cia);
return 0;
}
/* Device I/O */
static int
chirp_emul_open(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
struct open_args {
/*in*/
unsigned_cell device_specifier;
/*out*/
unsigned_cell ihandle;
} args;
char device_specifier[1024];
device_instance *ihandle;
/* read the args */
if (chirp_read_t2h_args(&args, sizeof(args), 1, 1, data, processor, cia))
return -1;
emul_read_string(device_specifier,
args.device_specifier,
sizeof(device_specifier),
processor, cia);
TRACE(trace_os_emul, ("open - in - device_specifier=`%s'\n",
device_specifier));
/* open the device */
ihandle = tree_instance(data->root, device_specifier);
if (ihandle == NULL)
args.ihandle = -1;
else
args.ihandle = device_instance_to_external(ihandle);
/* return the ihandle result */
TRACE(trace_os_emul, ("open - out - ihandle=0x%lx(0x%lx`%s')\n",
(unsigned long)args.ihandle,
(unsigned long)ihandle,
ihandle_name(ihandle)));
chirp_write_h2t_args(&args,
sizeof(args),
data,
processor, cia);
return 0;
}
static int
chirp_emul_close(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
struct close_args {
/*in*/
unsigned_cell ihandle;
/*out*/
} args;
device_instance *ihandle;
/* read the args */
if (chirp_read_t2h_args(&args, sizeof(args), 1, 0, data, processor, cia))
return -1;
ihandle = external_to_device_instance(data->root, args.ihandle);
TRACE(trace_os_emul, ("close - in - ihandle=0x%lx(0x%lx`%s')\n",
(unsigned long)args.ihandle,
(unsigned long)ihandle,
ihandle_name(ihandle)));
/* close the device */
if (ihandle == NULL) {
/* OpenFirmware doesn't define this error */
error("chirp: invalid ihandle passed to close method");
}
else {
device_instance_delete(ihandle);
}
/* return the ihandle result */
TRACE(trace_os_emul, ("close - out\n"));
chirp_write_h2t_args(&args,
sizeof(args),
data,
processor, cia);
return 0;
}
static int
chirp_emul_read(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
struct read_args {
/*in*/
unsigned_cell ihandle;
unsigned_cell addr;
unsigned_cell len;
/*out*/
unsigned_cell actual;
} args;
char buf[1024];
device_instance *ihandle;
/* read the args */
if (chirp_read_t2h_args(&args, sizeof(args), 3, 1, data, processor, cia))
return -1;
ihandle = external_to_device_instance(data->root, args.ihandle);
TRACE(trace_os_emul, ("read - in - ihandle=0x%lx(0x%lx`%s') addr=0x%lx len=%ld\n",
(unsigned long)args.ihandle,
(unsigned long)ihandle,
ihandle_name(ihandle),
(unsigned long)args.addr,
(unsigned long)args.len));
if (ihandle == NULL) {
/* OpenFirmware doesn't define this error */
error("chirp: invalid ihandle passed to read method");
}
else {
/* do the reads */
int actual = 0;
while (actual < args.len) {
int remaining = args.len - actual;
int to_read = (remaining <= sizeof(buf) ? remaining : sizeof(buf));
int nr_read = device_instance_read(ihandle, buf, to_read);
if (nr_read < 0) {
actual = nr_read; /* the error */
break;
}
else if (nr_read == 0) {
break;
}
emul_write_buffer(buf,
args.addr + actual,
nr_read,
processor, cia);
actual += nr_read;
}
if (actual >= 0) {
args.actual = actual;
if (actual < sizeof(buf))
buf[actual] = '\0';
else
buf[sizeof(buf) - 1] = '\0';
}
else {
switch (actual) {
case sim_io_eof:
args.actual = 0;
break;
case sim_io_not_ready:
ASSERT(sim_io_not_ready == -2);
args.actual = sim_io_not_ready;
break;
default:
error("Bad error value %ld", (long)actual);
break;
}
}
}
/* return the result */
TRACE(trace_os_emul, ("read - out - actual=%ld `%s'\n",
(long)args.actual,
((args.actual > 0 && args.actual < sizeof(buf)) ? buf : "")
));
chirp_write_h2t_args(&args,
sizeof(args),
data,
processor, cia);
return 0;
}
static int
chirp_emul_write(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
struct write_args {
/*in*/
unsigned_cell ihandle;
unsigned_cell addr;
unsigned_cell len;
/*out*/
unsigned_cell actual;
} args;
char buf[1024];
device_instance *ihandle;
int actual;
/* get the args */
if (chirp_read_t2h_args(&args, sizeof(args), 3, 1, data, processor, cia))
return -1;
actual = args.len;
if (actual >= sizeof(buf))
actual = sizeof(buf) - 1;
emul_read_buffer(buf,
args.addr,
actual,
processor, cia);
buf[actual] = '\0';
ihandle = external_to_device_instance(data->root, args.ihandle);
TRACE(trace_os_emul, ("write - in - ihandle=0x%lx(0x%lx`%s') `%s' (%ld)\n",
(unsigned long)args.ihandle,
(unsigned long)ihandle,
ihandle_name(ihandle),
buf, (long)actual));
if (ihandle == NULL) {
/* OpenFirmware doesn't define this error */
error("chirp: invalid ihandle passed to write method");
}
else {
/* write it out */
actual = device_instance_write(ihandle, buf, actual);
if (actual < 0)
args.actual = 0;
else
args.actual = actual;
}
/* return the result */
TRACE(trace_os_emul, ("write - out - actual=%ld\n",
(long)args.actual));
chirp_write_h2t_args(&args,
sizeof(args),
data,
processor, cia);
return 0;
}
static int
chirp_emul_seek(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
struct seek_args {
/*in*/
unsigned_cell ihandle;
unsigned_cell pos_hi;
unsigned_cell pos_lo;
/*out*/
unsigned_cell status;
} args;
int status;
device_instance *ihandle;
/* get the args */
if (chirp_read_t2h_args(&args, sizeof(args), 3, 1, data, processor, cia))
return -1;
ihandle = external_to_device_instance(data->root, args.ihandle);
TRACE(trace_os_emul, ("seek - in - ihandle=0x%lx(0x%lx`%s') pos.hi=0x%lx pos.lo=0x%lx\n",
(unsigned long)args.ihandle,
(unsigned long)ihandle,
ihandle_name(ihandle),
args.pos_hi, args.pos_lo));
if (ihandle == NULL) {
/* OpenFirmware doesn't define this error */
error("chirp: invalid ihandle passed to seek method");
}
else {
/* seek it out */
status = device_instance_seek(ihandle, args.pos_hi, args.pos_lo);
args.status = status;
}
/* return the result */
TRACE(trace_os_emul, ("seek - out - status=%ld\n",
(long)args.status));
chirp_write_h2t_args(&args,
sizeof(args),
data,
processor, cia);
return 0;
}
/* memory */
static int
chirp_emul_claim(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
/* NOTE: the client interface claim routine is *very* different to
the "claim" method described in IEEE-1275 appendix A. The latter
uses real addresses while this uses virtual (effective)
addresses. */
struct claim_args {
/* in */
unsigned_cell virt;
unsigned_cell size;
unsigned_cell align;
/* out */
unsigned_cell baseaddr;
} args;
/* read the args */
if (chirp_read_t2h_args(&args, sizeof(args),
3 /*n_args*/, 1 /*n_returns*/,
data, processor, cia))
return -1;
TRACE(trace_os_emul, ("claim - in - virt=0x%lx size=%ld align=%d\n",
(unsigned long)args.virt,
(long int)args.size,
(int)args.align));
/* use the memory device to allocate (real) memory at the requested
address */
{
device_instance *memory = tree_find_ihandle_property(data->root, "/chosen/memory");
unsigned_cell mem_in[3];
unsigned_cell mem_out[1];
mem_in[0] = args.align; /*top-of-stack*/
mem_in[1] = args.size;
mem_in[2] = args.virt;
if (device_instance_call_method(memory, "claim",
3, mem_in, 1, mem_out) < 0)
error("chirp: claim failed to allocate memory virt=0x%lx size=%ld align=%d",
(unsigned long)args.virt,
(long int)args.size,
(int)args.align);
args.baseaddr = mem_out[0];
}
/* if using virtual addresses, create a 1-1 map of this address space */
if (!data->real_mode) {
error("chirp: claim method does not support virtual mode");
}
/* return the base address */
TRACE(trace_os_emul, ("claim - out - baseaddr=0x%lx\n",
(unsigned long)args.baseaddr));
chirp_write_h2t_args(&args,
sizeof(args),
data,
processor, cia);
return 0;
}
static int
chirp_emul_release(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
/* NOTE: the client interface release routine is *very* different to
the "claim" method described in IEEE-1275 appendix A. The latter
uses real addresses while this uses virtual (effective)
addresses. */
struct claim_args {
/* in */
unsigned_cell virt;
unsigned_cell size;
/* out */
} args;
/* read the args */
if (chirp_read_t2h_args(&args, sizeof(args),
2 /*n_args*/, 0 /*n_returns*/,
data, processor, cia))
return -1;
TRACE(trace_os_emul, ("release - in - virt=0x%lx size=%ld\n",
(unsigned long)args.virt,
(long int)args.size));
/* use the memory device to release (real) memory at the requested
address */
{
device_instance *memory = tree_find_ihandle_property(data->root, "/chosen/memory");
unsigned_cell mem_in[2];
mem_in[0] = args.size;
mem_in[1] = args.virt;
if (device_instance_call_method(memory, "release",
2, mem_in, 0, NULL) < 0)
error("chirp: claim failed to release memory virt=0x%lx size=%ld",
(unsigned long)args.virt,
(long int)args.size);
}
/* if using virtual addresses, remove the 1-1 map of this address space */
if (!data->real_mode) {
error("chirp: release method does not support virtual mode");
}
/* return the base address */
TRACE(trace_os_emul, ("release - out\n"));
chirp_write_h2t_args(&args,
sizeof(args),
data,
processor, cia);
return 0;
}
/* Control transfer */
static int
chirp_emul_boot(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
/* unlike OpenFirmware this one can take an argument */
struct boot_args {
/*in*/
unsigned_cell bootspec;
/*out*/
} args;
char bootspec[1024];
/* read in the arguments */
if (chirp_read_t2h_args(&args, sizeof(args), -1, 0, data, processor, cia))
cpu_halt(processor, cia, was_exited, -1);
if (args.bootspec != 0)
emul_read_string(bootspec, args.bootspec, sizeof(bootspec),
processor, cia);
else
strcpy(bootspec, "(null)");
TRACE(trace_os_emul, ("boot - in bootspec=`%s'\n", bootspec));
/* just report this and exit */
printf_filtered("chrp: boot %s called, exiting.\n", bootspec);
cpu_halt(processor, cia, was_exited, 0);
return 0;
}
static int
chirp_emul_enter(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
error("chirp: enter method not implemented\n");
return 0;
}
static int
chirp_emul_exit(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
/* unlike OpenBoot this one can take an argument */
struct exit_args {
/*in*/
signed_cell status;
/*out*/
} args;
if (chirp_read_t2h_args(&args, sizeof(args), -1, 0, data, processor, cia))
cpu_halt(processor, cia, was_exited, -1);
cpu_halt(processor, cia, was_exited, args.status);
return 0;
}
static int
chirp_emul_chain(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
error("chirp: chain method not implemented\n");
return 0;
}
/* user interface */
static int
chirp_emul_interpret(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
error("chirp: interpret method not implemented\n");
return 0;
}
static int
chirp_emul_set_callback(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
error("chirp: set_callback method not implemented\n");
return 0;
}
static int
chirp_emul_set_symbol_lookup(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
error("chirp: set_symbol_lookup method not implemented\n");
return 0;
}
/* Time */
static int
chirp_emul_milliseconds(os_emul_data *data,
cpu *processor,
unsigned_word cia)
{
struct test_args {
/*in*/
/*out*/
unsigned_cell ms;
} args;
unsigned64 time;
/* read in the arguments */
if (chirp_read_t2h_args(&args, sizeof(args), 1, 1, data, processor, cia))
return -1;
/* make up a number */
time = event_queue_time(psim_event_queue(cpu_system(processor))) / 1000000;
args.ms = time;
/* write the arguments back out */
TRACE(trace_os_emul, ("milliseconds - out - ms=%ld\n",
(unsigned long)args.ms));
chirp_write_h2t_args(&args,
sizeof(args),
data,
processor, cia);
return 0;
}
static chirp_services services[] = {
/* client interface */
{ "test", chirp_emul_test },
/* device tree */
{ "peer", chirp_emul_peer },
{ "child", chirp_emul_child },
{ "parent", chirp_emul_parent },
{ "instance-to-package", chirp_emul_instance_to_package },
{ "getproplen", chirp_emul_getproplen },
{ "getprop", chirp_emul_getprop },
{ "nextprop", chirp_emul_nextprop },
/* { "setprop", chirp_emul_setprop }, */
{ "canon", chirp_emul_canon },
{ "finddevice", chirp_emul_finddevice },
{ "instance-to-path", chirp_emul_instance_to_path },
{ "package-to-path", chirp_emul_package_to_path },
{ "call-method", chirp_emul_call_method },
/* device I/O */
{ "open", chirp_emul_open },
{ "close", chirp_emul_close },
{ "read", chirp_emul_read },
{ "write", chirp_emul_write },
{ "seek", chirp_emul_seek },
{ "write", chirp_emul_write },
/* memory */
{ "claim", chirp_emul_claim },
{ "release", chirp_emul_release },
/* control transfer */
{ "boot", chirp_emul_boot },
{ "enter", chirp_emul_enter },
{ "exit", chirp_emul_exit },
{ "chain", chirp_emul_chain },
/* user interface */
{ "interpret", chirp_emul_interpret },
{ "set_callback", chirp_emul_set_callback },
{ "set_symbol_lookup", chirp_emul_set_symbol_lookup },
/* time */
{ "milliseconds", chirp_emul_milliseconds },
{ 0, /* sentinal */ },
};
/* main handlers */
/* Any starting address greater than this is assumed to be an Chirp
rather than VEA */
#ifndef CHIRP_START_ADDRESS
#define CHIRP_START_ADDRESS 0x80000000
#endif
#ifndef CHIRP_LOAD_BASE
#define CHIRP_LOAD_BASE -1
#endif
typedef struct _chirp_note_desc {
signed32 real_mode;
signed32 real_base;
signed32 real_size;
signed32 virt_base;
signed32 virt_size;
signed32 load_base;
} chirp_note_desc;
typedef enum {
note_missing,
note_found,
note_correct,
} note_found_status;
typedef struct _chirp_note {
chirp_note_desc desc;
note_found_status found;
} chirp_note;
typedef struct _chirp_note_head {
unsigned32 namesz;
unsigned32 descsz;
unsigned32 type;
} chirp_note_head;
static void
map_over_chirp_note(bfd *image,
asection *sect,
PTR obj)
{
chirp_note *note = (chirp_note*)obj;
if (strcmp(sect->name, ".note") == 0) {
chirp_note_head head;
char name[16];
/* check the head */
if (!bfd_get_section_contents(image, sect,
&head, 0, sizeof(head)))
return;
head.namesz = bfd_get_32(image, (void*)&head.namesz);
head.descsz = bfd_get_32(image, (void*)&head.descsz);
head.type = bfd_get_32(image, (void*)&head.type);
if (head.type != 0x1275)
return;
/* check the name field */
if (head.namesz > sizeof(name)) {
error("chirp: note name too long (%d > %d)\n", (int)head.namesz, sizeof(name));
}
if (!bfd_get_section_contents(image, sect,
name, sizeof(head), head.namesz)) {
error("chirp: note name unreadable\n");
}
if (strcmp(name, "PowerPC") != 0) {
printf_filtered("chirp: note name (%s) not `PowerPC'\n", name);
}
/* check the size */
if (head.descsz == sizeof(note->desc) - sizeof(signed32)) {
sim_io_printf_filtered("chirp: note descriptor missing load-base\n");
}
else if (head.descsz != sizeof(note->desc)) {
sim_io_printf_filtered("chirp: note descriptor of wrong size\n");
note->found = note_found;
return;
}
note->found = note_correct;
/* get the contents */
if (!bfd_get_section_contents(image, sect,
&note->desc, /* page align start */
((sizeof(head) + head.namesz) + 3) & ~3,
head.descsz)) {
error("chirp: note descriptor unreadable\n");
}
note->desc.real_mode = bfd_get_32(image, (void*)&note->desc.real_mode);
note->desc.real_base = bfd_get_32(image, (void*)&note->desc.real_base);
note->desc.real_size = bfd_get_32(image, (void*)&note->desc.real_size);
note->desc.virt_base = bfd_get_32(image, (void*)&note->desc.virt_base);
note->desc.virt_size = bfd_get_32(image, (void*)&note->desc.virt_size);
if (head.descsz == sizeof(note->desc))
note->desc.load_base = bfd_get_32(image, (void*)&note->desc.load_base);
else
note->desc.load_base = CHIRP_LOAD_BASE;
}
}
static os_emul_data *
emul_chirp_create(device *root,
bfd *image,
const char *name)
{
os_emul_data *chirp;
device *node;
chirp_note note;
int i;
/* Sanity check that this really is the chosen emulation */
if (name == NULL && image == NULL)
return NULL;
if (name != NULL
&& strcmp(name, "ob") != 0
&& strcmp(name, "ieee1274") != 0
&& strcmp(name, "chrp") != 0
&& strcmp(name, "chirp") != 0
&& strcmp(name, "openboot") != 0)
return NULL;
/* look for an elf note section, enter its values into the device tree */
memset(&note, 0, sizeof(note));
if (image != NULL)
bfd_map_over_sections(image, map_over_chirp_note, &note);
if (name == NULL && image != NULL && note.found == note_missing)
return NULL;
/* Assume that it is a chirp emulation */
chirp = ZALLOC(os_emul_data);
chirp->root = root;
chirp->services = services;
/* the root node */
tree_parse(root, "/name \"gpl,clayton");
/* default options */
emul_add_tree_options(root, image, "chirp", "oea",
0 /*oea-interrupt-prefix*/);
/* hardware */
emul_add_tree_hardware(root);
/* basic information */
chirp->memory_size
= tree_find_integer_property(root, "/openprom/options/oea-memory-size");
chirp->little_endian
= tree_find_boolean_property(root, "/options/little-endian?");
chirp->floating_point_available
= tree_find_boolean_property(root, "/openprom/options/floating-point?");
chirp->interrupt_prefix =
tree_find_integer_property(root, "/openprom/options/oea-interrupt-prefix");
/* Perform an interum layout of the openboot firmware in memory */
/* a page for firmware calls */
chirp->sizeof_code = 4096;
chirp->code_offset = 0x4000; /* possible space for interrupt table */
/* the stack */
chirp->sizeof_stack = 32 * 1024;
chirp->stack_offset = chirp->code_offset + chirp->sizeof_code;
/* the hash table */
if (!note.desc.real_mode) {
chirp->nr_page_table_entry_groups = (chirp->memory_size < 0x800000
? 1024 /* min allowed */
: (chirp->memory_size / 4096 / 2));
chirp->sizeof_htab = chirp->nr_page_table_entry_groups * 64;
}
chirp->htab_offset = chirp->stack_offset + chirp->sizeof_stack;
/* the actual amount of space needed */
chirp->real_size = chirp->htab_offset + chirp->sizeof_htab;
/* now go through and see if it fits in what is available */
/* resolve real-mode? */
if (note.found == note_correct)
chirp->real_mode = note.desc.real_mode;
else if (tree_find_property(root, "/options/real-mode?") != NULL)
chirp->real_mode = tree_find_boolean_property(root, "/options/real-mode?");
else
chirp->real_mode = 0;
if (tree_find_property(root, "/options/real-mode?") != NULL) {
if (!chirp->real_mode
!= !tree_find_boolean_property(root, "/options/real-mode?"))
error("chirp: /options/real-mode? conflicts with note section\n");
}
else
tree_parse(root, "/options/real-mode? %s",
chirp->real_mode ? "true" : "false");
/* resolve real-base */
if (note.found == note_correct
&& note.desc.real_base != (signed32)-1)
chirp->real_base = note.desc.real_base;
else if (tree_find_property(root, "/options/real-base") != NULL)
chirp->real_base = tree_find_integer_property(root, "/options/real-base");
else
chirp->real_base = chirp->memory_size - chirp->real_size;
if (tree_find_property(root, "/options/real-base") != NULL) {
if (chirp->real_base != tree_find_integer_property(root, "/options/real-base"))
error("chirp: /options/real-base conflicts with note section\n");
}
else
tree_parse(root, "/options/real-base 0x%lx",
(unsigned long)chirp->real_base);
/* resolve real-size */
if (note.found == note_correct
&& note.desc.real_size != (signed32)-1
&& note.desc.real_size != 0
&& chirp->real_size > note.desc.real_size)
error("chirp: insufficient physical memory for firmware\n");
if (tree_find_property(root, "/options/real-size") != NULL) {
if (chirp->real_size > tree_find_integer_property(root, "/options/real-size"))
error("chirp: /options/real-size conflicts with note section\n");
}
else
tree_parse(root, "/options/real-size 0x%lx",
(unsigned long)chirp->real_size);
/* resolve virt-base */
if (chirp->real_mode)
chirp->virt_base = chirp->real_base;
else if (note.found == note_correct && note.desc.virt_base != (signed32)-1)
chirp->virt_base = note.desc.virt_base;
else if (tree_find_property(root, "/options/virt-base") != NULL)
chirp->virt_base = tree_find_integer_property(root, "/options/virt-base");
else
chirp->virt_base = CHIRP_START_ADDRESS;
if (tree_find_property(root, "/options/virt-base") != NULL) {
if (chirp->virt_base != tree_find_integer_property(root, "/options/virt-base"))
error("chirp: /options/virt-base conflicts with note section\n");
}
else
tree_parse(root, "/options/virt-base 0x%lx",
chirp->real_mode ? -1 : (unsigned long)chirp->virt_base);
/* resolve virt-size */
chirp->virt_size = chirp->real_size;
if (note.found == note_correct
&& note.desc.virt_size != (signed32)-1
&& note.desc.virt_size != 0
&& !chirp->real_mode
&& chirp->virt_size > note.desc.virt_size)
error("chirp: insufficent virtual memory for firmware\n");
if (tree_find_property(root, "/options/virt-size") != NULL) {
if (chirp->virt_size > tree_find_integer_property(root, "/options/virt-size"))
error("chirp: /options/virt-size conflicts with note section\n");
}
else
tree_parse(root, "/options/virt-size 0x%lx",
chirp->real_mode ? -1 : (unsigned long)chirp->virt_size);
/* resolve load-base */
if (note.found == note_correct
&& note.desc.load_base != (signed32)-1)
chirp->load_base = note.desc.load_base;
else if (tree_find_property(root, "/options/load-base") != NULL)
chirp->load_base = tree_find_integer_property(root, "/options/load-base");
else
chirp->load_base = CHIRP_LOAD_BASE;
if (tree_find_property(root, "/options/load-base") != NULL) {
if (chirp->load_base != tree_find_integer_property(root, "/options/load-base"))
error("chirp: /options/load-base conflicts with note section\n");
}
else
tree_parse(root, "/options/load-base 0x%lx",
(unsigned long)chirp->load_base);
/* now adjust the preliminary firmware addresses to final values */
chirp->code_ra = chirp->code_offset + chirp->real_base;
chirp->stack_ra = chirp->stack_offset + chirp->real_base;
chirp->htab_ra = chirp->htab_offset + chirp->real_base;
/* the virtual addresses. In real mode these are real addresses. */
chirp->code_va = chirp->code_offset + chirp->virt_base;
chirp->stack_va = chirp->stack_offset + chirp->virt_base;
chirp->htab_va = chirp->htab_offset + chirp->virt_base;
chirp->code_client_va = chirp->code_va;
chirp->code_client_ra = chirp->code_ra;
chirp->code_callback_va = chirp->code_client_va + 16;
chirp->code_callback_ra = chirp->code_client_ra + 16;
chirp->code_loop_va = chirp->code_callback_va + 16;
chirp->code_loop_ra = chirp->code_callback_ra + 16;
/* initialization */
tree_parse(root, "/openprom/init");
tree_parse(root, "/openprom/init/register");
tree_parse(root, "/openprom/init/register/0.pc 0x%lx",
(unsigned long)bfd_get_start_address(image));
tree_parse(root, "/openprom/init/register/pc 0x%lx",
(unsigned long)chirp->code_loop_va);
tree_parse(root, "/openprom/init/register/msr 0x%x",
(msr_machine_check_enable
| (chirp->real_mode
? 0
: (msr_instruction_relocate
| msr_data_relocate))
| (chirp->little_endian
? (msr_little_endian_mode
| msr_interrupt_little_endian_mode)
: 0)
| (chirp->floating_point_available
? msr_floating_point_available
: 0)
| (chirp->interrupt_prefix
? msr_interrupt_prefix
: 0)
));
tree_parse(root, "/openprom/init/register/sdr1 0x%lx",
(unsigned long)(chirp->htab_ra
| MASK32(16, 22)
| ((chirp->sizeof_htab - 1) >> 16)));
/* make certain that the segment registers map straight through */
for (i = 0; i < 16; i++) {
tree_parse(root, "/openprom/init/register/sr%d 0x%lx",
i, (unsigned long)i);
}
/* establish an initial state for all processors */
/* the client interface address */
tree_parse(root, "/openprom/init/register/r5 0x%lx",
(unsigned long)chirp->code_client_va);
/* a stack */
tree_parse(root, "/openprom/init/register/sp 0x%lx",
(unsigned long)(chirp->stack_va + chirp->sizeof_stack - 16));
/* in chrp mode any arguments end up being concatinated */
tree_parse(root, "/openprom/init/stack/stack-type chirp");
/* client interface - emul-call followed by return instruction */
node = tree_parse(root, "/openprom/init/data@0x%lx",
(unsigned long)chirp->code_client_ra);
tree_parse(node, "./psim,description \"client-interface instruction");
tree_parse(node, "./real-address 0x%lx",
(unsigned long)chirp->code_client_ra);
tree_parse(node, "./data 0x%lx",
(unsigned long)emul_call_instruction);
node = tree_parse(root, "/openprom/init/data@0x%lx",
(unsigned long)(chirp->code_client_ra + 4));
tree_parse(node, "./psim,description \"client-interface return instruction");
tree_parse(node, "./real-address 0x%lx",
(unsigned long)(chirp->code_client_ra + 4));
tree_parse(node, "./data 0x%lx",
(unsigned long)emul_blr_instruction);
/* return address for client callbacks - an emul-call instruction
that is again followed by a return instruction */
node = tree_parse(root, "/openprom/init/data@0x%lx",
(unsigned long)chirp->code_callback_ra);
tree_parse(node, "./psim,description \"client-callback instruction");
tree_parse(node, "./real-address 0x%lx",
(unsigned long)chirp->code_callback_ra);
tree_parse(node, "./data 0x%lx",
(unsigned long)emul_call_instruction);
node = tree_parse(root, "/openprom/init/data@0x%lx",
(unsigned long)(chirp->code_callback_ra + 4));
tree_parse(node, "./psim,description \"client-callback return instruction");
tree_parse(node, "./real-address 0x%lx",
(unsigned long)(chirp->code_callback_ra + 4));
tree_parse(node, "./data 0x%lx",
(unsigned long)emul_blr_instruction);
/* loop to keep other processors busy */
node = tree_parse(root, "/openprom/init/data@0x%lx",
(unsigned long)chirp->code_loop_ra);
tree_parse(node, "./psim,description \"processor busy loop");
tree_parse(node, "./real-address 0x%lx",
(unsigned long)chirp->code_loop_ra);
tree_parse(node, "./data 0x%lx",
(unsigned long)emul_loop_instruction);
/* hash table */
/* create a hash table */
if (!chirp->real_mode) {
node = tree_parse(root, "/openprom/init/htab@0x%lx",
(unsigned long)chirp->htab_ra);
tree_parse(node, "./claim 0");
tree_parse(node, "./real-address 0x%lx",
(unsigned long)chirp->htab_ra);
tree_parse(node, "./nr-bytes 0x%lx",
(unsigned long)chirp->sizeof_htab);
}
/* map in the stack */
if (!chirp->real_mode) {
node = tree_parse(root, "/openprom/init/htab/pte@0x%lx",
(unsigned long)chirp->stack_ra);
tree_parse(node, "./psim,description \"map in the stack");
tree_parse(node, "./claim 1");
tree_parse(node, "./virtual-address 0x%lx",
(unsigned long)chirp->stack_va);
tree_parse(node, "./real-address 0x%lx",
(unsigned long)chirp->stack_ra);
tree_parse(node, "./nr-bytes 0x%lx",
(unsigned long)chirp->sizeof_stack);
tree_parse(node, "./wimg %d", 0x7);
tree_parse(node, "./pp %d", 0x2);
}
/* map in the chrp openboot callback code */
if (!chirp->real_mode) {
node = tree_parse(root, "/openprom/init/htab/pte@0x%lx",
(unsigned long)chirp->code_ra);
tree_parse(node, "./psim,description \"map in chrp openboot callback code");
tree_parse(node, "./claim 1");
tree_parse(node, "./virtual-address 0x%lx",
(unsigned long)chirp->code_va);
tree_parse(node, "./real-address 0x%lx",
(unsigned long)chirp->code_ra);
tree_parse(node, "./nr-bytes 0x%lx",
(unsigned long)chirp->sizeof_code);
tree_parse(node, "./wimg %d", 0x7);
tree_parse(node, "./pp %d", 0x2);
}
/* map in the program to run */
if (chirp->real_mode) {
node = tree_parse(node, "/openprom/init/load-binary");
tree_parse(node, "./psim,description \"load the binary");
tree_parse(node, "./file-name %s", bfd_get_filename(image));
tree_parse(node, "./claim 1");
}
else {
node = tree_parse(root, "/openprom/init/htab/pte@0x%lx",
(unsigned long)chirp->load_base);
tree_parse(node, "./psim,description \"load & map the binary");
tree_parse(node, "./claim 1");
tree_parse(node, "./file-name \"%s", bfd_get_filename(image));
tree_parse(node, "./wimg %d", 0x7);
tree_parse(node, "./pp %d", 0x2);
}
return chirp;
}
static void
emul_chirp_init(os_emul_data *emul_data,
int nr_cpus)
{
emul_data->state = serving;
}
static int
emul_chirp_instruction_call(cpu *processor,
unsigned_word cia,
unsigned_word ra,
os_emul_data *emul_data)
{
unsigned_word service_name_addr;
unsigned_word result;
char service_buf[32];
char *service_name;
chirp_services *service;
switch (emul_data->state) {
case serving:
/* we are waiting on an OpenBoot request from the client program
via the client interface */
if (cia != emul_data->code_client_va)
return 0;
emul_data->return_address = LR;
emul_data->arguments = cpu_registers(processor)->gpr[3];
/* try to determine what to do */
service_name_addr = emul_read_word(cpu_registers(processor)->gpr[3],
processor, cia);
service_name = emul_read_string(service_buf, service_name_addr,
sizeof(service_buf), processor, cia);
emul_data->n_args = emul_read_word(emul_data->arguments + sizeof(unsigned_cell),
processor, cia);
emul_data->n_returns = emul_read_word(emul_data->arguments + 2 * sizeof(unsigned_cell),
processor, cia);
/* verify what was passed */
if (service_name_addr == 0
|| service_name == NULL) {
error("OpenFirmware called with invalid (NULL) service name from 0x%lx with args 0x%lx\n",
(unsigned long)emul_data->return_address,
(unsigned long)emul_data->arguments);
}
if (emul_data->n_args > 6) { /* See iee1275 requirements on nr returns */
error("OpenFirmware service %s called from 0x%lx with args 0x%lx, too many args (%d)\n",
(unsigned long)emul_data->return_address,
(unsigned long)emul_data->arguments,
emul_data->n_returns);
}
if (emul_data->n_returns > 6) {
error("OpenFirmware service %s called from 0x%lx with args 0x%lx, with too many returns (%d)\n",
(unsigned long)emul_data->return_address,
(unsigned long)emul_data->arguments,
emul_data->n_args);
}
/* look it up */
TRACE(trace_os_emul, ("%s called from 0x%lx with args 0x%lx\n",
service_name,
(unsigned long)emul_data->return_address,
(unsigned long)emul_data->arguments));
service = services;
while (service->name != NULL && strcmp(service->name, service_name) != 0)
service++;
/* found or not? */
if (service->name == NULL) {
error("OpenBoot service `%s' not found\n", service_name);
TRACE(trace_os_emul, ("%s not found\n", service_name));
cpu_registers(processor)->gpr[3] = -1;
}
else {
emul_data->service = service;
/* call upon it */
result = service->handler(emul_data, processor, cia);
if (result != 0)
TRACE(trace_os_emul, ("%s aborted with %ld\n", service_name, (long)result));
cpu_registers(processor)->gpr[3] = result;
}
break;
default:
error("emul_chirp_instruction_call() unknown internal state\n");
result = -1;
break;
}
/* return to caller - instruction following this is a function return */
return 1;
}
const os_emul emul_chirp = {
"chirp",
emul_chirp_create,
emul_chirp_init,
NULL, /*system_call*/
emul_chirp_instruction_call,
0 /*data*/
};
#endif
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