op_helper.c

/*
 *  CRIS helper routines
 *
 *  Copyright (c) 2007 AXIS Communications
 *  Written by Edgar E. Iglesias
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <assert.h>
#include "exec.h"
#include "mmu.h"

#define MMUSUFFIX _mmu
#ifdef __s390__
# define GETPC() ((void*)((unsigned long)__builtin_return_address(0) & 0x7fffffffUL))
#else
# define GETPC() (__builtin_return_address(0))
#endif

#define SHIFT 0
#include "softmmu_template.h"

#define SHIFT 1
#include "softmmu_template.h"

#define SHIFT 2
#include "softmmu_template.h"

#define SHIFT 3
#include "softmmu_template.h"

#define D(x)

/* Try to fill the TLB and return an exception if error. If retaddr is
   NULL, it means that the function was called in C code (i.e. not
   from generated code or from helper.c) */
/* XXX: fix it to restore all registers */
void tlb_fill (target_ulong addr, int is_write, int mmu_idx, void *retaddr)
{
    TranslationBlock *tb;
    CPUState *saved_env;
    unsigned long pc;
    int ret;

    /* XXX: hack to restore env in all cases, even if not called from
       generated code */
    saved_env = env;
    env = cpu_single_env;
    ret = cpu_cris_handle_mmu_fault(env, addr, is_write, mmu_idx, 1);
    if (__builtin_expect(ret, 0)) {
        if (retaddr) {
            /* now we have a real cpu fault */
            pc = (unsigned long)retaddr;
            tb = tb_find_pc(pc);
            if (tb) {
                /* the PC is inside the translated code. It means that we have
                   a virtual CPU fault */
                cpu_restore_state(tb, env, pc, NULL);
            }
        }
        cpu_loop_exit();
    }
    env = saved_env;
}

void helper_tlb_update(uint32_t T0)
{
#if !defined(CONFIG_USER_ONLY)
	uint32_t vaddr;

	vaddr = cris_mmu_tlb_latest_update(env, T0);
	D(printf("flush vaddr %x\n", vaddr));
	tlb_flush_page(env, vaddr);
#endif
}

void do_unassigned_access(target_phys_addr_t addr, int is_write, int is_exec,
                          int is_asi)
{
	D(printf("%s addr=%x w=%d ex=%d asi=%d\n", 
		__func__, addr, is_write, is_exec, is_asi));
}