Initial creation of sourceware repository
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Stan Shebs
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343
sim/ppc/emul_generic.c
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343
sim/ppc/emul_generic.c
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/* This file is part of the program psim.
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Copyright (C) 1994-1997, 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 _EMUL_GENERIC_C_
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#define _EMUL_GENERIC_C_
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#include "emul_generic.h"
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#ifndef STATIC_INLINE_EMUL_GENERIC
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#define STATIC_INLINE_EMUL_GENERIC STATIC_INLINE
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#endif
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STATIC_INLINE_EMUL_GENERIC void
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emul_syscall_enter(emul_syscall *emul,
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int call,
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int arg0,
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cpu *processor,
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unsigned_word cia)
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{
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printf_filtered("%d:0x%lx:%s(",
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cpu_nr(processor) + 1,
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(long)cia,
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emul->syscall_descriptor[call].name);
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}
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STATIC_INLINE_EMUL_GENERIC void
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emul_syscall_exit(emul_syscall *emul,
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int call,
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int arg0,
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cpu *processor,
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unsigned_word cia)
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{
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int status = cpu_registers(processor)->gpr[3];
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int error = cpu_registers(processor)->gpr[0];
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printf_filtered(")=%d", status);
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if (error > 0 && error < emul->nr_error_names)
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printf_filtered("[%s]", emul->error_names[error]);
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printf_filtered("\n");
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}
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INLINE_EMUL_GENERIC unsigned64
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emul_read_gpr64(cpu *processor,
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int g)
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{
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unsigned32 hi;
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unsigned32 lo;
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if (CURRENT_TARGET_BYTE_ORDER == BIG_ENDIAN) {
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hi = cpu_registers(processor)->gpr[g];
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lo = cpu_registers(processor)->gpr[g+1];
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}
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else {
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lo = cpu_registers(processor)->gpr[g];
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hi = cpu_registers(processor)->gpr[g+1];
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}
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return (INSERTED64(hi, 0, 31) | INSERTED64(lo, 32, 63));
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}
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INLINE_EMUL_GENERIC void
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emul_write_gpr64(cpu *processor,
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int g,
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unsigned64 val)
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{
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unsigned32 hi = EXTRACTED64(val, 0, 31);
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unsigned32 lo = EXTRACTED64(val, 32, 63);
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if (CURRENT_TARGET_BYTE_ORDER == BIG_ENDIAN) {
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cpu_registers(processor)->gpr[g] = hi;
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cpu_registers(processor)->gpr[g+1] = lo;
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}
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else {
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cpu_registers(processor)->gpr[g] = lo;
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cpu_registers(processor)->gpr[g+1] = hi;
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}
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}
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INLINE_EMUL_GENERIC char *
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emul_read_string(char *dest,
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unsigned_word addr,
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unsigned nr_bytes,
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cpu *processor,
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unsigned_word cia)
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{
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unsigned nr_moved = 0;
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if (addr == 0)
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return NULL;
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while (1) {
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dest[nr_moved] = vm_data_map_read_1(cpu_data_map(processor),
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addr + nr_moved,
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processor, cia);
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if (dest[nr_moved] == '\0' || nr_moved >= nr_bytes)
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break;
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nr_moved++;
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}
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dest[nr_moved] = '\0';
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return dest;
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}
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INLINE_EMUL_GENERIC void
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emul_write_status(cpu *processor,
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int status,
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int errno)
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{
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if (status == -1 && errno != 0) {
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cpu_registers(processor)->gpr[3] = errno;
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CR_SET(0, cr_i_summary_overflow);
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}
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else {
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cpu_registers(processor)->gpr[3] = status;
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CR_SET(0, 0);
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}
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}
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INLINE_EMUL_GENERIC void
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emul_write2_status(cpu *processor,
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int status1,
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int status2,
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int errno)
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{
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if (status1 == -1 && errno != 0) {
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cpu_registers(processor)->gpr[3] = errno;
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CR_SET(0, cr_i_summary_overflow);
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}
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else {
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cpu_registers(processor)->gpr[3] = status1;
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cpu_registers(processor)->gpr[4] = status2;
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CR_SET(0, 0);
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}
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}
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INLINE_EMUL_GENERIC unsigned_word
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emul_read_word(unsigned_word addr,
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cpu *processor,
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unsigned_word cia)
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{
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return vm_data_map_read_word(cpu_data_map(processor),
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addr,
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processor, cia);
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}
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INLINE_EMUL_GENERIC void
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emul_write_word(unsigned_word addr,
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unsigned_word buf,
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cpu *processor,
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unsigned_word cia)
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{
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vm_data_map_write_word(cpu_data_map(processor),
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addr,
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buf,
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processor, cia);
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}
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INLINE_EMUL_GENERIC void
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emul_write_buffer(const void *source,
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unsigned_word addr,
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unsigned nr_bytes,
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cpu *processor,
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unsigned_word cia)
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{
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int nr_moved;
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for (nr_moved = 0; nr_moved < nr_bytes; nr_moved++) {
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vm_data_map_write_1(cpu_data_map(processor),
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addr + nr_moved,
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((const char*)source)[nr_moved],
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processor, cia);
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}
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}
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INLINE_EMUL_GENERIC void
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emul_read_buffer(void *dest,
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unsigned_word addr,
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unsigned nr_bytes,
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cpu *processor,
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unsigned_word cia)
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{
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int nr_moved;
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for (nr_moved = 0; nr_moved < nr_bytes; nr_moved++) {
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((char*)dest)[nr_moved] = vm_data_map_read_1(cpu_data_map(processor),
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addr + nr_moved,
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processor, cia);
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}
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}
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INLINE_EMUL_GENERIC void
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emul_do_system_call(os_emul_data *emul_data,
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emul_syscall *emul,
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unsigned call,
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const int arg0,
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cpu *processor,
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unsigned_word cia)
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{
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emul_syscall_handler *handler = NULL;
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if (call >= emul->nr_system_calls)
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error("do_call() os_emul call %d out-of-range\n", call);
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handler = emul->syscall_descriptor[call].handler;
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if (handler == NULL) {
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if (emul->syscall_descriptor[call].name) {
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error("do_call() unimplemented call %s\n", emul->syscall_descriptor[call].name);
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} else {
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error("do_call() unimplemented call %d\n", call);
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}
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}
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if (WITH_TRACE && ppc_trace[trace_os_emul])
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emul_syscall_enter(emul, call, arg0, processor, cia);
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cpu_registers(processor)->gpr[0] = 0; /* default success */
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handler(emul_data, call, arg0, processor, cia);
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if (WITH_TRACE && ppc_trace[trace_os_emul])
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emul_syscall_exit(emul, call, arg0, processor, cia);
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}
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/* default size for the first bank of memory */
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#ifndef OEA_MEMORY_SIZE
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#define OEA_MEMORY_SIZE 0x100000
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#endif
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/* Add options to the device tree */
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INLINE_EMUL_GENERIC void
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emul_add_tree_options(device *tree,
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bfd *image,
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const char *emul,
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const char *env,
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int oea_interrupt_prefix)
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{
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int little_endian = 0;
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/* sort out little endian */
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if (tree_find_property(tree, "/options/little-endian?"))
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little_endian = tree_find_boolean_property(tree, "/options/little-endian?");
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else {
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#ifdef bfd_little_endian /* new bfd */
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little_endian = (image != NULL && bfd_little_endian(image));
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#else
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little_endian = (image != NULL &&
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!image->xvec->byteorder_big_p);
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#endif
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tree_parse(tree, "/options/little-endian? %s",
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little_endian ? "true" : "false");
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}
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/* misc other stuff */
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tree_parse(tree, "/openprom/options/oea-memory-size 0x%x",
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OEA_MEMORY_SIZE);
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tree_parse(tree, "/openprom/options/oea-interrupt-prefix %d",
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oea_interrupt_prefix);
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tree_parse(tree, "/openprom/options/smp 1");
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tree_parse(tree, "/openprom/options/env %s", env);
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tree_parse(tree, "/openprom/options/os-emul %s", emul);
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tree_parse(tree, "/openprom/options/strict-alignment? %s",
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(WITH_ALIGNMENT == STRICT_ALIGNMENT)
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? "true" : "false");
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tree_parse(tree, "/openprom/options/floating-point? %s",
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WITH_FLOATING_POINT ? "true" : "false");
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tree_parse(tree, "/openprom/options/use-stdio? %s",
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((WITH_STDIO == DO_USE_STDIO
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|| WITH_STDIO == 0)
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? "true" : "false"));
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tree_parse(tree, "/openprom/options/model \"%s",
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model_name[WITH_DEFAULT_MODEL]);
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tree_parse(tree, "/openprom/options/model-issue %d",
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MODEL_ISSUE_IGNORE);
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/* useful options */
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}
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INLINE_EMUL_GENERIC void
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emul_add_tree_hardware(device *root)
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{
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int i;
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int nr_cpus = tree_find_integer_property(root, "/openprom/options/smp");
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/* sanity check the number of processors */
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if (nr_cpus > MAX_NR_PROCESSORS)
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error("Specified number of processors (%d) exceeds the number configured (%d).\n",
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nr_cpus, MAX_NR_PROCESSORS);
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/* set the number of address cells (1 or 2) */
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tree_parse(root, "#address-cells %d", WITH_TARGET_WORD_BITSIZE / 32);
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/* add some memory */
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if (tree_find_device(root, "/memory") == NULL) {
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unsigned_word memory_size =
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tree_find_integer_property(root, "/openprom/options/oea-memory-size");
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const unsigned_word avail_start = 0x3000;
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tree_parse(root, "/memory@0/reg 0x0 0x%lx",
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(unsigned long)memory_size);
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/* reserve the first 0x3000 for the PowerPC interrupt table */
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tree_parse(root, "/memory@0/available 0x%lx 0x%lx",
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(unsigned long)avail_start,
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(unsigned long)memory_size - avail_start);
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}
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/* our processors */
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for (i = 0; i < nr_cpus; i++) {
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tree_parse(root, "/cpus/cpu@%d/cpu-nr %d", i, i);
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}
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/* the debugging pal - hide it in the openprom and don't attach it
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to any bus */
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tree_parse(root, "/openprom/pal");
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/* chosen etc */
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tree_parse(root, "/chosen/stdin */openprom/pal");
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tree_parse(root, "/chosen/stdout !/chosen/stdin");
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tree_parse(root, "/chosen/memory */memory");
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}
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#endif /* _EMUL_GENERIC_C_ */
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