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/* armvirt.c -- ARMulator virtual memory interace: ARM6 Instruction Emulator.
Copyright (C) 1994 Advanced RISC Machines Ltd.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* This file contains a complete ARMulator memory model, modelling a
"virtual memory" system. A much simpler model can be found in armfast.c,
and that model goes faster too, but has a fixed amount of memory. This
model's memory has 64K pages, allocated on demand from a 64K entry page
table. The routines PutWord and GetWord implement this. Pages are never
freed as they might be needed again. A single area of memory may be
defined to generate aborts. */
#include "core/arm/skyeye_common/armdefs.h"
#include "core/arm/skyeye_common/armemu.h"
#include "core/mem_map.h"
#define dumpstack 1
#define dumpstacksize 0x10
#define maxdmupaddr 0x0033a850
/*ARMword ARMul_GetCPSR (ARMul_State * state) {
return 0;
}
ARMword ARMul_GetSPSR (ARMul_State * state, ARMword mode) {
return 0;
}
void ARMul_SetCPSR (ARMul_State * state, ARMword value) {
}
void ARMul_SetSPSR (ARMul_State * state, ARMword mode, ARMword value) {
}*/
void ARMul_Icycles(ARMul_State * state, unsigned number, ARMword address) {
}
void ARMul_Ccycles(ARMul_State * state, unsigned number, ARMword address) {
}
ARMword ARMul_LoadInstrS(ARMul_State * state, ARMword address, ARMword isize) {
state->NumScycles++;
#ifdef HOURGLASS
if ((state->NumScycles & HOURGLASS_RATE) == 0) {
HOURGLASS;
}
#endif
if (isize == 2)
return (u16)Memory::Read16(address);
else
return (u32)Memory::Read32(address);
}
ARMword ARMul_LoadInstrN(ARMul_State * state, ARMword address, ARMword isize) {
state->NumNcycles++;
if (isize == 2)
return (u16)Memory::Read16(address);
else
return (u32)Memory::Read32(address);
}
ARMword ARMul_ReLoadInstr(ARMul_State * state, ARMword address, ARMword isize) {
ARMword data;
if ((isize == 2) && (address & 0x2)) {
ARMword lo;
lo = (u16)Memory::Read16(address);
return lo;
}
data = (u32)Memory::Read32(address);
return data;
}
ARMword ARMul_ReadWord(ARMul_State * state, ARMword address) {
ARMword data;
data = Memory::Read32(address);
return data;
}
ARMword ARMul_LoadWordS(ARMul_State * state, ARMword address) {
state->NumScycles++;
return ARMul_ReadWord(state, address);
}
ARMword ARMul_LoadWordN(ARMul_State * state, ARMword address) {
state->NumNcycles++;
return ARMul_ReadWord(state, address);
}
ARMword ARMul_LoadHalfWord(ARMul_State * state, ARMword address) {
state->NumNcycles++;
return (u16)Memory::Read16(address);;
}
ARMword ARMul_ReadByte(ARMul_State * state, ARMword address) {
return (u8)Memory::Read8(address);
}
ARMword ARMul_LoadByte(ARMul_State * state, ARMword address) {
state->NumNcycles++;
return ARMul_ReadByte(state, address);
}
void ARMul_StoreHalfWord(ARMul_State * state, ARMword address, ARMword data) {
state->NumNcycles++;
Memory::Write16(address, data);
}
void ARMul_StoreByte(ARMul_State * state, ARMword address, ARMword data) {
state->NumNcycles++;
ARMul_WriteByte(state, address, data);
}
ARMword ARMul_SwapWord(ARMul_State * state, ARMword address, ARMword data) {
ARMword temp;
state->NumNcycles++;
temp = ARMul_ReadWord(state, address);
state->NumNcycles++;
Memory::Write32(address, data);
return temp;
}
ARMword ARMul_SwapByte(ARMul_State * state, ARMword address, ARMword data) {
ARMword temp;
temp = ARMul_LoadByte(state, address);
Memory::Write8(address, data);
return temp;
}
void ARMul_WriteWord(ARMul_State * state, ARMword address, ARMword data) {
Memory::Write32(address, data);
}
void ARMul_WriteByte(ARMul_State * state, ARMword address, ARMword data)
{
Memory::Write8(address, data);
}
void ARMul_StoreWordS(ARMul_State * state, ARMword address, ARMword data)
{
state->NumScycles++;
ARMul_WriteWord(state, address, data);
}
void ARMul_StoreWordN(ARMul_State * state, ARMword address, ARMword data)
{
state->NumNcycles++;
ARMul_WriteWord(state, address, data);
}
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