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yuzu/src/core/arm/interpreter/armcopro.cpp
bunnei 818ba32746 ARM: Removed unnecessary and unused SkyEye MMU code. 
Added license header back in. I originally removed this because I mostly rewrote the file, but meh
2014-10-25 14:11:41 -04:00

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/* armcopro.c -- co-processor interface: ARM6 Instruction Emulator.
Copyright (C) 1994, 2000 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. */
#include "core/arm/skyeye_common/armdefs.h"
#include "core/arm/skyeye_common/armemu.h"
#include "core/arm/skyeye_common/vfp/vfp.h"
//chy 2005-07-08
//#include "ansidecl.h"
//chy -------
//#include "iwmmxt.h"
/* Dummy Co-processors. */
static unsigned
NoCoPro3R(ARMul_State * state,
unsigned a, ARMword b)
{
return ARMul_CANT;
}
static unsigned
NoCoPro4R(ARMul_State * state,
unsigned a,
ARMword b, ARMword c)
{
return ARMul_CANT;
}
static unsigned
NoCoPro4W(ARMul_State * state,
unsigned a,
ARMword b, ARMword * c)
{
return ARMul_CANT;
}
static unsigned
NoCoPro5R(ARMul_State * state,
unsigned a,
ARMword b,
ARMword c, ARMword d)
{
return ARMul_CANT;
}
static unsigned
NoCoPro5W(ARMul_State * state,
unsigned a,
ARMword b,
ARMword * c, ARMword * d)
{
return ARMul_CANT;
}
/* The XScale Co-processors. */
/* Coprocessor 15: System Control. */
static void write_cp14_reg(unsigned, ARMword);
static ARMword read_cp14_reg(unsigned);
/* Check an access to a register. */
static unsigned
check_cp15_access(ARMul_State * state,
unsigned reg,
unsigned CRm, unsigned opcode_1, unsigned opcode_2)
{
/* Do not allow access to these register in USER mode. */
//chy 2006-02-16 , should not consider system mode, don't conside 26bit mode
if (state->Mode == USER26MODE || state->Mode == USER32MODE)
return ARMul_CANT;
/* Opcode_1should be zero. */
if (opcode_1 != 0)
return ARMul_CANT;
/* Different register have different access requirements. */
switch (reg) {
case 0:
case 1:
/* CRm must be 0. Opcode_2 can be anything. */
if (CRm != 0)
return ARMul_CANT;
break;
case 2:
case 3:
/* CRm must be 0. Opcode_2 must be zero. */
if ((CRm != 0) || (opcode_2 != 0))
return ARMul_CANT;
break;
case 4:
/* Access not allowed. */
return ARMul_CANT;
case 5:
case 6:
/* Opcode_2 must be zero. CRm must be 0. */
if ((CRm != 0) || (opcode_2 != 0))
return ARMul_CANT;
break;
case 7:
/* Permissable combinations:
Opcode_2 CRm
0 5
0 6
0 7
1 5
1 6
1 10
4 10
5 2
6 5 */
switch (opcode_2) {
default:
return ARMul_CANT;
case 6:
if (CRm != 5)
return ARMul_CANT;
break;
case 5:
if (CRm != 2)
return ARMul_CANT;
break;
case 4:
if (CRm != 10)
return ARMul_CANT;
break;
case 1:
if ((CRm != 5) && (CRm != 6) && (CRm != 10))
return ARMul_CANT;
break;
case 0:
if ((CRm < 5) || (CRm > 7))
return ARMul_CANT;
break;
}
break;
case 8:
/* Permissable combinations:
Opcode_2 CRm
0 5
0 6
0 7
1 5
1 6 */
if (opcode_2 > 1)
return ARMul_CANT;
if ((CRm < 5) || (CRm > 7))
return ARMul_CANT;
if (opcode_2 == 1 && CRm == 7)
return ARMul_CANT;
break;
case 9:
/* Opcode_2 must be zero or one. CRm must be 1 or 2. */
if (((CRm != 0) && (CRm != 1))
|| ((opcode_2 != 1) && (opcode_2 != 2)))
return ARMul_CANT;
break;
case 10:
/* Opcode_2 must be zero or one. CRm must be 4 or 8. */
if (((CRm != 0) && (CRm != 1))
|| ((opcode_2 != 4) && (opcode_2 != 8)))
return ARMul_CANT;
break;
case 11:
/* Access not allowed. */
return ARMul_CANT;
case 12:
/* Access not allowed. */
return ARMul_CANT;
case 13:
/* Opcode_2 must be zero. CRm must be 0. */
if ((CRm != 0) || (opcode_2 != 0))
return ARMul_CANT;
break;
case 14:
/* Opcode_2 must be 0. CRm must be 0, 3, 4, 8 or 9. */
if (opcode_2 != 0)
return ARMul_CANT;
if ((CRm != 0) && (CRm != 3) && (CRm != 4) && (CRm != 8)
&& (CRm != 9))
return ARMul_CANT;
break;
case 15:
/* Opcode_2 must be zero. CRm must be 1. */
if ((CRm != 1) || (opcode_2 != 0))
return ARMul_CANT;
break;
default:
/* Should never happen. */
return ARMul_CANT;
}
return ARMul_DONE;
}
/* Install co-processor instruction handlers in this routine. */
unsigned
ARMul_CoProInit(ARMul_State * state)
{
unsigned int i;
/* Initialise tham all first. */
for (i = 0; i < 16; i++)
ARMul_CoProDetach(state, i);
/* Install CoPro Instruction handlers here.
The format is:
ARMul_CoProAttach (state, CP Number, Init routine, Exit routine
LDC routine, STC routine, MRC routine, MCR routine,
CDP routine, Read Reg routine, Write Reg routine). */
if (state->is_v6) {
ARMul_CoProAttach(state, 10, VFPInit, NULL, VFPLDC, VFPSTC,
VFPMRC, VFPMCR, VFPMRRC, VFPMCRR, VFPCDP, NULL, NULL);
ARMul_CoProAttach(state, 11, VFPInit, NULL, VFPLDC, VFPSTC,
VFPMRC, VFPMCR, VFPMRRC, VFPMCRR, VFPCDP, NULL, NULL);
/*ARMul_CoProAttach (state, 15, MMUInit, NULL, NULL, NULL,
MMUMRC, MMUMCR, NULL, NULL, NULL, NULL, NULL);*/
}
//chy 2003-09-03 do it in future!!!!????
#if 0
if (state->is_iWMMXt) {
ARMul_CoProAttach(state, 0, NULL, NULL, IwmmxtLDC, IwmmxtSTC,
NULL, NULL, IwmmxtCDP, NULL, NULL);
ARMul_CoProAttach(state, 1, NULL, NULL, NULL, NULL,
IwmmxtMRC, IwmmxtMCR, IwmmxtCDP, NULL,
NULL);
}
#endif
/* No handlers below here. */
/* Call all the initialisation routines. */
for (i = 0; i < 16; i++)
if (state->CPInit[i])
(state->CPInit[i]) (state);
return TRUE;
}
/* Install co-processor finalisation routines in this routine. */
void
ARMul_CoProExit(ARMul_State * state)
{
register unsigned i;
for (i = 0; i < 16; i++)
if (state->CPExit[i])
(state->CPExit[i]) (state);
for (i = 0; i < 16; i++) /* Detach all handlers. */
ARMul_CoProDetach(state, i);
}
/* Routines to hook Co-processors into ARMulator. */
void
ARMul_CoProAttach(ARMul_State * state,
unsigned number,
ARMul_CPInits * init,
ARMul_CPExits * exit,
ARMul_LDCs * ldc,
ARMul_STCs * stc,
ARMul_MRCs * mrc,
ARMul_MCRs * mcr,
ARMul_MRRCs * mrrc,
ARMul_MCRRs * mcrr,
ARMul_CDPs * cdp,
ARMul_CPReads * read, ARMul_CPWrites * write)
{
if (init != NULL)
state->CPInit[number] = init;
if (exit != NULL)
state->CPExit[number] = exit;
if (ldc != NULL)
state->LDC[number] = ldc;
if (stc != NULL)
state->STC[number] = stc;
if (mrc != NULL)
state->MRC[number] = mrc;
if (mcr != NULL)
state->MCR[number] = mcr;
if (mrrc != NULL)
state->MRRC[number] = mrrc;
if (mcrr != NULL)
state->MCRR[number] = mcrr;
if (cdp != NULL)
state->CDP[number] = cdp;
if (read != NULL)
state->CPRead[number] = read;
if (write != NULL)
state->CPWrite[number] = write;
}
void
ARMul_CoProDetach(ARMul_State * state, unsigned number)
{
ARMul_CoProAttach(state, number, NULL, NULL,
NoCoPro4R, NoCoPro4W, NoCoPro4W, NoCoPro4R,
NoCoPro5W, NoCoPro5R, NoCoPro3R, NULL, NULL);
state->CPInit[number] = NULL;
state->CPExit[number] = NULL;
state->CPRead[number] = NULL;
state->CPWrite[number] = NULL;
}
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