target/hppa/mem_helper.c

   1 /*
   2  *  HPPA memory access helper routines
   3  *
   4  *  Copyright (c) 2017 Helge Deller
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "qemu/osdep.h"
  21 #include "cpu.h"
  22 #include "exec/exec-all.h"
  23 #include "exec/helper-proto.h"
  24 #include "qom/cpu.h"
  25
  26 #ifdef CONFIG_USER_ONLY
  27 int hppa_cpu_handle_mmu_fault(CPUState *cs, vaddr address,
  28                               int size, int rw, int mmu_idx)
  29 {
  30     HPPACPU *cpu = HPPA_CPU(cs);
  31
  32     /* ??? Test between data page fault and data memory protection trap,
  33        which would affect si_code.  */
  34     cs->exception_index = EXCP_DMP;
  35     cpu->env.ior = address;
  36     return 1;
  37 }
  38 #else
  39 hwaddr hppa_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
  40 {
  41     /* Stub */
  42     return addr;
  43 }
  44
  45 void tlb_fill(CPUState *cs, target_ulong addr, MMUAccessType type,
  46               int mmu_idx, uintptr_t retaddr)
  47 {
  48     /* Stub */
  49     int prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
  50     hwaddr phys = addr;
  51
  52     /* Success!  Store the translation into the QEMU TLB.  */
  53     tlb_set_page(cs, addr & TARGET_PAGE_MASK, phys & TARGET_PAGE_MASK,
  54                  prot, mmu_idx, TARGET_PAGE_SIZE);
  55 }
  56 #endif /* CONFIG_USER_ONLY */