mirror of
https://github.com/Lime3DS/Lime3DS.git
synced 2024-11-14 05:55:13 +01:00
818ba32746
Added license header back in. I originally removed this because I mostly rewrote the file, but meh
326 lines
8.4 KiB
C++
326 lines
8.4 KiB
C++
/* 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;
|
|
}
|