310 lines
7.4 KiB
C
310 lines
7.4 KiB
C
/* This file is part of the program psim.
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Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef _DEVICE_TABLE_C_
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#define _DEVICE_TABLE_C_
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#include "device_table.h"
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#if HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#include <ctype.h>
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/* Helper functions */
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/* Go through the devices various reg properties for those that
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specify attach addresses */
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void
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generic_device_init_address(device *me)
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{
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static const char *(reg_property_names[]) = {
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"attach-addresses",
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"assigned-addresses",
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"reg",
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"alternate-reg" ,
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NULL
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};
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const char **reg_property_name;
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int nr_valid_reg_properties = 0;
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for (reg_property_name = reg_property_names;
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*reg_property_name != NULL;
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reg_property_name++) {
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if (device_find_property(me, *reg_property_name) != NULL) {
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reg_property_spec reg;
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int reg_entry;
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for (reg_entry = 0;
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device_find_reg_array_property(me, *reg_property_name, reg_entry,
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®);
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reg_entry++) {
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unsigned_word attach_address;
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int attach_space;
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unsigned attach_size;
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if (!device_address_to_attach_address(device_parent(me),
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®.address,
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&attach_space, &attach_address,
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me))
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continue;
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if (!device_size_to_attach_size(device_parent(me),
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®.size,
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&attach_size, me))
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continue;
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device_attach_address(device_parent(me),
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attach_callback,
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attach_space, attach_address, attach_size,
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access_read_write_exec,
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me);
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nr_valid_reg_properties++;
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}
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/* if first option matches don't try for any others */
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if (reg_property_name == reg_property_names)
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break;
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}
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}
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}
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int
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generic_device_unit_decode(device *bus,
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const char *unit,
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device_unit *phys)
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{
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memset(phys, 0, sizeof(device_unit));
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if (unit == NULL)
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return 0;
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else {
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int nr_cells = 0;
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const int max_nr_cells = device_nr_address_cells(bus);
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while (1) {
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char *end = NULL;
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unsigned long val;
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val = strtoul(unit, &end, 0);
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/* parse error? */
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if (unit == end)
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return -1;
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/* two many cells? */
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if (nr_cells >= max_nr_cells)
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return -1;
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/* save it */
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phys->cells[nr_cells] = val;
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nr_cells++;
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unit = end;
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/* more to follow? */
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if (isspace(*unit) || *unit == '\0')
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break;
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if (*unit != ',')
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return -1;
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unit++;
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}
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if (nr_cells < max_nr_cells) {
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/* shift everything to correct position */
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int i;
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for (i = 1; i <= nr_cells; i++)
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phys->cells[max_nr_cells - i] = phys->cells[nr_cells - i];
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for (i = 0; i < (max_nr_cells - nr_cells); i++)
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phys->cells[i] = 0;
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}
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phys->nr_cells = max_nr_cells;
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return max_nr_cells;
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}
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}
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int
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generic_device_unit_encode(device *bus,
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const device_unit *phys,
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char *buf,
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int sizeof_buf)
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{
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int i;
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int len;
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char *pos = buf;
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/* skip leading zero's */
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for (i = 0; i < phys->nr_cells; i++) {
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if (phys->cells[i] != 0)
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break;
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}
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/* don't output anything if empty */
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if (phys->nr_cells == 0) {
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strcpy(pos, "");
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len = 0;
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}
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else if (i == phys->nr_cells) {
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/* all zero */
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strcpy(pos, "0");
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len = 1;
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}
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else {
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for (; i < phys->nr_cells; i++) {
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if (pos != buf) {
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strcat(pos, ",");
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pos = strchr(pos, '\0');
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}
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if (phys->cells[i] < 10)
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sprintf(pos, "%ld", (unsigned long)phys->cells[i]);
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else
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sprintf(pos, "0x%lx", (unsigned long)phys->cells[i]);
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pos = strchr(pos, '\0');
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}
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len = pos - buf;
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}
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if (len >= sizeof_buf)
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error("generic_unit_encode - buffer overflow\n");
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return len;
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}
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int
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generic_device_address_to_attach_address(device *me,
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const device_unit *address,
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int *attach_space,
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unsigned_word *attach_address,
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device *client)
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{
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int i;
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for (i = 0; i < address->nr_cells - 2; i++) {
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if (address->cells[i] != 0)
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device_error(me, "Only 32bit addresses supported");
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}
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if (address->nr_cells >= 2)
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*attach_space = address->cells[address->nr_cells - 2];
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else
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*attach_space = 0;
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*attach_address = address->cells[address->nr_cells - 1];
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return 1;
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}
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int
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generic_device_size_to_attach_size(device *me,
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const device_unit *size,
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unsigned *nr_bytes,
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device *client)
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{
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int i;
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for (i = 0; i < size->nr_cells - 1; i++) {
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if (size->cells[i] != 0)
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device_error(me, "Only 32bit sizes supported");
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}
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*nr_bytes = size->cells[0];
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return *nr_bytes;
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}
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/* ignore/passthrough versions of each function */
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void
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passthrough_device_address_attach(device *me,
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attach_type attach,
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int space,
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unsigned_word addr,
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unsigned nr_bytes,
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access_type access,
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device *client) /*callback/default*/
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{
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device_attach_address(device_parent(me), attach,
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space, addr, nr_bytes,
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access,
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client);
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}
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void
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passthrough_device_address_detach(device *me,
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attach_type attach,
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int space,
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unsigned_word addr,
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unsigned nr_bytes,
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access_type access,
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device *client) /*callback/default*/
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{
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device_detach_address(device_parent(me), attach,
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space, addr, nr_bytes, access,
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client);
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}
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unsigned
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passthrough_device_dma_read_buffer(device *me,
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void *dest,
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int space,
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unsigned_word addr,
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unsigned nr_bytes)
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{
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return device_dma_read_buffer(device_parent(me), dest,
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space, addr, nr_bytes);
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}
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unsigned
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passthrough_device_dma_write_buffer(device *me,
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const void *source,
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int space,
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unsigned_word addr,
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unsigned nr_bytes,
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int violate_read_only_section)
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{
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return device_dma_write_buffer(device_parent(me), source,
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space, addr,
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nr_bytes,
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violate_read_only_section);
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}
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int
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ignore_device_unit_decode(device *me,
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const char *unit,
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device_unit *phys)
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{
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memset(phys, 0, sizeof(device_unit));
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return 0;
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}
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static const device_callbacks passthrough_callbacks = {
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{ NULL, }, /* init */
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{ passthrough_device_address_attach,
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passthrough_device_address_detach, },
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{ NULL, }, /* IO */
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{ passthrough_device_dma_read_buffer, passthrough_device_dma_write_buffer, },
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{ NULL, }, /* interrupt */
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{ generic_device_unit_decode,
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generic_device_unit_encode, },
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};
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static const device_descriptor ob_device_table[] = {
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/* standard OpenBoot devices */
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{ "aliases", NULL, &passthrough_callbacks },
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{ "options", NULL, &passthrough_callbacks },
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{ "chosen", NULL, &passthrough_callbacks },
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{ "packages", NULL, &passthrough_callbacks },
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{ "cpus", NULL, &passthrough_callbacks },
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{ "openprom", NULL, &passthrough_callbacks },
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{ "init", NULL, &passthrough_callbacks },
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{ NULL },
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};
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const device_descriptor *const device_table[] = {
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ob_device_table,
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#include "hw.c"
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NULL,
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};
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#endif /* _DEVICE_TABLE_C_ */
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