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BIG CHANGE : Core of emu (armcpu) has been translated to C

This commit is contained in:
thoduv 2006-04-07 19:20:51 +00:00
parent 028eba694c
commit d92d13f099
4 changed files with 145 additions and 78 deletions
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32
desmume/src/arm_instructions.h Normal file
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@ -0,0 +1,32 @@
/* Copyright (C) 2006 yopyop
yopyop156@ifrance.com
yopyop156.ifrance.com
This file is part of DeSmuME
DeSmuME 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.
DeSmuME 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 DeSmuME; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef ARMINSTRUCTION_H
#define ARMINSTRUCTION_H
#include "types.h"
typedef struct armcpu_t armcpu_t;
extern unsigned long (*__fastcall arm_instructions_set[4096])(armcpu_t * cpu);
#endif

87
desmume/src/armcpu.h
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@ -24,13 +24,7 @@
#include "types.h" #include "types.h"
#include "ICoProc.hpp"
#include "arm_instructions.hpp"
#include "thumb_instructions.hpp"
#include "MMU.hpp" #include "MMU.hpp"
#include "CP15.hpp"
#include "bios.hpp"
#define BIT_N(i,n) (((i)>>(n))&1) #define BIT_N(i,n) (((i)>>(n))&1)
#define CONDITION(i) (i)>>28 #define CONDITION(i) (i)>>28
@ -151,7 +145,9 @@ union Status_Reg
unsigned long val; unsigned long val;
}; };
typedef struct typedef void* armcp_t;
typedef struct armcpu_t
{ {
unsigned long proc_ID; unsigned long proc_ID;
unsigned long instruction; //4 unsigned long instruction; //4
@ -170,7 +166,7 @@ typedef struct
unsigned long R8_fiq, R9_fiq, R10_fiq, R11_fiq, R12_fiq, R13_fiq, R14_fiq; unsigned long R8_fiq, R9_fiq, R10_fiq, R11_fiq, R12_fiq, R13_fiq, R14_fiq;
Status_Reg SPSR_svc, SPSR_abt, SPSR_und, SPSR_irq, SPSR_fiq; Status_Reg SPSR_svc, SPSR_abt, SPSR_und, SPSR_irq, SPSR_fiq;
ICoProc * coproc[16]; armcp_t *coproc[16];
unsigned long intVector; unsigned long intVector;
unsigned char LDTBit; //1 : ARMv5 style 0 : non ARMv5 unsigned char LDTBit; //1 : ARMv5 style 0 : non ARMv5
@ -179,79 +175,16 @@ typedef struct
bool wirq; bool wirq;
unsigned long (* *swi_tab)(ARMCPU * cpu); unsigned long (* *swi_tab)(struct armcpu_t * cpu);
} armcpu_t; } armcpu_t;
int armcpu_new(armcpu_t *armcpu, unsigned long id);
void armcpu_init(armcpu_t *armcpu, unsigned long adr); void armcpu_init(armcpu_t *armcpu, unsigned long adr);
unsigned long armcpu_switchMode(armcpu_t *armcpu, unsigned char mode); unsigned long armcpu_switchMode(armcpu_t *armcpu, unsigned char mode);
unsigned long armcpu_prefetch(armcpu_t *armcpu);
inline unsigned long armcpu_prefetch(armcpu_t *armcpu) unsigned long armcpu_exec(armcpu_t *armcpu);
{ bool armcpu_irqExeption(armcpu_t *armcpu);
if(armcpu->CPSR.bits.T == 0) bool armcpu_prefetchExeption(armcpu_t *armcpu);
{
armcpu->instruction = MMU::readWord(armcpu->proc_ID, armcpu->next_instruction);
armcpu->instruct_adr = armcpu->next_instruction;
armcpu->next_instruction += 4;
armcpu->R[15] = armcpu->next_instruction + 4;
return MMU::MMU_WAIT32[armcpu->proc_ID][(armcpu->instruct_adr>>24)&0xF];
}
armcpu->instruction = MMU::readHWord(armcpu->proc_ID, armcpu->next_instruction);
armcpu->instruct_adr = armcpu->next_instruction;
armcpu->next_instruction = armcpu->next_instruction + 2;
armcpu->R[15] = armcpu->next_instruction + 2;
return MMU::MMU_WAIT16[armcpu->proc_ID][(armcpu->instruct_adr>>24)&0xF];
}
inline unsigned long armcpu_exec(armcpu_t *armcpu)
{
unsigned long c = 1;
if(armcpu->CPSR.bits.T == 0)
{
if((TEST_COND(CONDITION(armcpu->instruction), armcpu->CPSR)) || ((CONDITION(armcpu->instruction)==0xF)&&(CODE(armcpu->instruction)==0x5)))
{
c = arm_instructions_set[INSTRUCTION_INDEX(armcpu->instruction)](armcpu);
}
c += armcpu_prefetch(armcpu);
return c;
}
c = thumb_instructions_set[armcpu->instruction>>6](armcpu);
c += armcpu_prefetch(armcpu);
return c;
}
inline bool irqExeption(armcpu_t *armcpu)
{
if(armcpu->CPSR.bits.I) return false;
Status_Reg tmp = armcpu->CPSR;
armcpu_switchMode(armcpu, IRQ);
armcpu->R[14] = armcpu->instruct_adr + 4;
armcpu->SPSR = tmp;
armcpu->CPSR.bits.T = 0;
armcpu->CPSR.bits.I = 1;
armcpu->next_instruction = armcpu->intVector + 0x18;
armcpu->R[15] = armcpu->next_instruction;
armcpu->waitIRQ = 0;
armcpu_prefetch(armcpu);
return true;
}
inline bool prefetchExeption(armcpu_t *armcpu)
{
if(armcpu->CPSR.bits.I) return false;
Status_Reg tmp = armcpu->CPSR;
armcpu_switchMode(armcpu, ABT);
armcpu->R[14] = armcpu->instruct_adr + 4;
armcpu->SPSR = tmp;
armcpu->CPSR.bits.T = 0;
armcpu->CPSR.bits.I = 1;
armcpu->next_instruction = armcpu->intVector + 0xC;
armcpu->R[15] = armcpu->next_instruction;
armcpu->waitIRQ = 0;
armcpu_prefetch(armcpu);
return true;
}
#endif #endif

70
desmume/src/cp15.h Normal file
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@ -0,0 +1,70 @@
/* Copyright (C) 2006 yopyop
yopyop156@ifrance.com
yopyop156.ifrance.com
This file is part of DeSmuME
DeSmuME 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.
DeSmuME 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 DeSmuME; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __CP15_H__
#define __CP15_H__
#include "types.h"
#include "armcpu.h"
typedef struct
{
unsigned long IDCode;
unsigned long cacheType;
unsigned long TCMSize;
unsigned long ctrl;
unsigned long DCConfig;
unsigned long ICConfig;
unsigned long writeBuffCtrl;
unsigned long und;
unsigned long DaccessPerm;
unsigned long IaccessPerm;
unsigned long protectBaseSize0;
unsigned long protectBaseSize1;
unsigned long protectBaseSize2;
unsigned long protectBaseSize3;
unsigned long protectBaseSize4;
unsigned long protectBaseSize5;
unsigned long protectBaseSize6;
unsigned long protectBaseSize7;
unsigned long cacheOp;
unsigned long DcacheLock;
unsigned long IcacheLock;
unsigned long ITCMRegion;
unsigned long DTCMRegion;
unsigned long processID;
unsigned long RAM_TAG;
unsigned long testState;
unsigned long cacheDbg;
armcpu_t * cpu;
} armcp15_t;
armcp15_t *armcp15_new(armcpu_t *c);
bool armcp15_dataProcess(armcp15_t *armcp15, unsigned char CRd, unsigned char CRn, unsigned char CRm, unsigned char opcode1, unsigned char opcode2);
bool armcp15_load(armcp15_t *armcp15, unsigned char CRd, unsigned char adr);
bool armcp15_store(armcp15_t *armcp15, unsigned char CRd, unsigned char adr);
bool armcp15_moveCP2ARM(armcp15_t *armcp15, unsigned long * R, unsigned char CRn, unsigned char CRm, unsigned char opcode1, unsigned char opcode2);
bool armcp15_moveARM2CP(armcp15_t *armcp15, unsigned long val, unsigned char CRn, unsigned char CRm, unsigned char opcode1, unsigned char opcode2);
#endif /* __CP15_H__*/

32
desmume/src/thumb_instructions.h Normal file
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@ -0,0 +1,32 @@
/* Copyright (C) 2006 yopyop
yopyop156@ifrance.com
yopyop156.ifrance.com
This file is part of DeSmuME
DeSmuME 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.
DeSmuME 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 DeSmuME; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef THUMB_INSTRUCTIONS_H
#define THUMB_INSTRUCTIONS_H
#include "types.h"
#include "armcpu.h"
extern unsigned long (* __fastcall thumb_instructions_set[1024])(armcpu_t * cpu);
#endif