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/*
* Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch>
*
* This file is part of nios2sim-ng.
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <stdio.h>
#include <string.h>
#include "nios2sim-ng.h"
#include "nios2.h"
void nios2_cpu_reset(struct nios2 *cpu)
{
memset(cpu, 0x00, sizeof(struct nios2));
cpu->mode = NIOS2_SUPERVISOR_MODE;
}
bool nios2_in_user_mode(struct nios2 *cpu)
{
if (!cpu->has_mmu)
return false;
else if (cpu->mode != NIOS2_USER_MODE)
return false;
else
return true;
}
bool nios2_in_supervisor_mode(struct nios2 *cpu)
{
return !nios2_in_user_mode(cpu);
}
uint32_t nios2_cpu_fetch_instr(struct nios2 *cpu, uint32_t *mem_base)
{
uint32_t instr = 0;
return instr;
}
int nios2_cpu_execute_instr(struct nios2 *cpu, uint32_t instr)
{
instruction_handler handle_instr = instruction_get_handler(instr);
if (unlikely(handle_instr == NULL)) {
err("Invalid instruction %08x\n", instr);
return -1;
}
return handle_instr(cpu, instr);
}
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