mirror of
https://github.com/PabloMK7/citra.git
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1035 lines
29 KiB
C++
1035 lines
29 KiB
C++
/* armsupp.c -- ARMulator support code: ARM6 Instruction Emulator.
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Copyright (C) 1994 Advanced RISC Machines Ltd.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "core/arm/skyeye_common/armdefs.h"
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#include "core/arm/skyeye_common/armemu.h"
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#include "core/arm/disassembler/arm_disasm.h"
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#include "core/mem_map.h"
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static ARMword ModeToBank (ARMword);
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static void EnvokeList (ARMul_State *, unsigned int, unsigned int);
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struct EventNode {
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/* An event list node. */
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unsigned (*func) (ARMul_State *); /* The function to call. */
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struct EventNode *next;
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};
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/* This routine returns the value of a register from a mode. */
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ARMword
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ARMul_GetReg (ARMul_State * state, unsigned mode, unsigned reg)
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{
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mode &= MODEBITS;
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if (mode != state->Mode)
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return (state->RegBank[ModeToBank ((ARMword) mode)][reg]);
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else
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return (state->Reg[reg]);
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}
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/* This routine sets the value of a register for a mode. */
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void
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ARMul_SetReg (ARMul_State * state, unsigned mode, unsigned reg, ARMword value)
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{
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mode &= MODEBITS;
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if (mode != state->Mode)
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state->RegBank[ModeToBank ((ARMword) mode)][reg] = value;
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else
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state->Reg[reg] = value;
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}
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/* This routine returns the value of the PC, mode independently. */
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ARMword
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ARMul_GetPC (ARMul_State * state)
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{
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if (state->Mode > SVC26MODE)
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return state->Reg[15];
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else
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return R15PC;
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}
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/* This routine returns the value of the PC, mode independently. */
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ARMword
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ARMul_GetNextPC (ARMul_State * state)
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{
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if (state->Mode > SVC26MODE)
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return state->Reg[15] + INSN_SIZE;
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else
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return (state->Reg[15] + INSN_SIZE) & R15PCBITS;
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}
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/* This routine sets the value of the PC. */
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void
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ARMul_SetPC (ARMul_State * state, ARMword value)
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{
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if (ARMul_MODE32BIT)
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state->Reg[15] = value & PCBITS;
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else
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state->Reg[15] = R15CCINTMODE | (value & R15PCBITS);
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FLUSHPIPE;
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}
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/* This routine returns the value of register 15, mode independently. */
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ARMword
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ARMul_GetR15 (ARMul_State * state)
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{
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if (state->Mode > SVC26MODE)
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return (state->Reg[15]);
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else
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return (R15PC | ECC | ER15INT | EMODE);
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}
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/* This routine sets the value of Register 15. */
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void
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ARMul_SetR15 (ARMul_State * state, ARMword value)
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{
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if (ARMul_MODE32BIT)
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state->Reg[15] = value & PCBITS;
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else {
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state->Reg[15] = value;
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ARMul_R15Altered (state);
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}
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FLUSHPIPE;
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}
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/* This routine returns the value of the CPSR. */
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ARMword
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ARMul_GetCPSR (ARMul_State * state)
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{
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//chy 2003-08-20: below is from gdb20030716, maybe isn't suitable for system simulator
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//return (CPSR | state->Cpsr); for gdb20030716
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return (CPSR); //had be tested in old skyeye with gdb5.0-5.3
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}
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/* This routine sets the value of the CPSR. */
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void
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ARMul_SetCPSR (ARMul_State * state, ARMword value)
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{
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state->Cpsr = value;
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ARMul_CPSRAltered (state);
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}
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/* This routine does all the nasty bits involved in a write to the CPSR,
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including updating the register bank, given a MSR instruction. */
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void
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ARMul_FixCPSR (ARMul_State * state, ARMword instr, ARMword rhs)
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{
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state->Cpsr = ARMul_GetCPSR (state);
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//chy 2006-02-16 , should not consider system mode, don't conside 26bit mode
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if (state->Mode != USER26MODE && state->Mode != USER32MODE ) {
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/* In user mode, only write flags. */
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if (BIT (16))
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SETPSR_C (state->Cpsr, rhs);
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if (BIT (17))
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SETPSR_X (state->Cpsr, rhs);
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if (BIT (18))
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SETPSR_S (state->Cpsr, rhs);
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}
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if (BIT (19))
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SETPSR_F (state->Cpsr, rhs);
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ARMul_CPSRAltered (state);
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}
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/* Get an SPSR from the specified mode. */
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ARMword
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ARMul_GetSPSR (ARMul_State * state, ARMword mode)
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{
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ARMword bank = ModeToBank (mode & MODEBITS);
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if (!BANK_CAN_ACCESS_SPSR (bank))
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return ARMul_GetCPSR (state);
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return state->Spsr[bank];
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}
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/* This routine does a write to an SPSR. */
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void
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ARMul_SetSPSR (ARMul_State * state, ARMword mode, ARMword value)
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{
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ARMword bank = ModeToBank (mode & MODEBITS);
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if (BANK_CAN_ACCESS_SPSR (bank))
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state->Spsr[bank] = value;
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}
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/* This routine does a write to the current SPSR, given an MSR instruction. */
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void
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ARMul_FixSPSR (ARMul_State * state, ARMword instr, ARMword rhs)
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{
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if (BANK_CAN_ACCESS_SPSR (state->Bank)) {
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if (BIT (16))
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SETPSR_C (state->Spsr[state->Bank], rhs);
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if (BIT (17))
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SETPSR_X (state->Spsr[state->Bank], rhs);
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if (BIT (18))
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SETPSR_S (state->Spsr[state->Bank], rhs);
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if (BIT (19))
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SETPSR_F (state->Spsr[state->Bank], rhs);
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}
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}
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/* This routine updates the state of the emulator after the Cpsr has been
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changed. Both the processor flags and register bank are updated. */
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void
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ARMul_CPSRAltered (ARMul_State * state)
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{
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ARMword oldmode;
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if (state->prog32Sig == LOW)
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state->Cpsr &= (CCBITS | INTBITS | R15MODEBITS);
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oldmode = state->Mode;
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/*if (state->Mode != (state->Cpsr & MODEBITS)) {
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state->Mode =
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ARMul_SwitchMode (state, state->Mode,
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state->Cpsr & MODEBITS);
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state->NtransSig = (state->Mode & 3) ? HIGH : LOW;
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}*/
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//state->Cpsr &= ~MODEBITS;
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ASSIGNINT (state->Cpsr & INTBITS);
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//state->Cpsr &= ~INTBITS;
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ASSIGNN ((state->Cpsr & NBIT) != 0);
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//state->Cpsr &= ~NBIT;
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ASSIGNZ ((state->Cpsr & ZBIT) != 0);
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//state->Cpsr &= ~ZBIT;
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ASSIGNC ((state->Cpsr & CBIT) != 0);
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//state->Cpsr &= ~CBIT;
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ASSIGNV ((state->Cpsr & VBIT) != 0);
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//state->Cpsr &= ~VBIT;
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ASSIGNQ ((state->Cpsr & QBIT) != 0);
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//state->Cpsr &= ~QBIT;
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state->GEFlag = (state->Cpsr & 0x000F0000);
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#ifdef MODET
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ASSIGNT ((state->Cpsr & TBIT) != 0);
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//state->Cpsr &= ~TBIT;
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#endif
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if (oldmode > SVC26MODE) {
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if (state->Mode <= SVC26MODE) {
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state->Emulate = CHANGEMODE;
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state->Reg[15] = ECC | ER15INT | EMODE | R15PC;
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}
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} else {
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if (state->Mode > SVC26MODE) {
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state->Emulate = CHANGEMODE;
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state->Reg[15] = R15PC;
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} else
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state->Reg[15] = ECC | ER15INT | EMODE | R15PC;
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}
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}
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/* This routine updates the state of the emulator after register 15 has
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been changed. Both the processor flags and register bank are updated.
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This routine should only be called from a 26 bit mode. */
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void
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ARMul_R15Altered (ARMul_State * state)
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{
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if (state->Mode != R15MODE) {
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state->Mode = ARMul_SwitchMode (state, state->Mode, R15MODE);
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state->NtransSig = (state->Mode & 3) ? HIGH : LOW;
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}
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if (state->Mode > SVC26MODE)
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state->Emulate = CHANGEMODE;
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ASSIGNR15INT (R15INT);
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ASSIGNN ((state->Reg[15] & NBIT) != 0);
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ASSIGNZ ((state->Reg[15] & ZBIT) != 0);
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ASSIGNC ((state->Reg[15] & CBIT) != 0);
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ASSIGNV ((state->Reg[15] & VBIT) != 0);
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}
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/* This routine controls the saving and restoring of registers across mode
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changes. The regbank matrix is largely unused, only rows 13 and 14 are
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used across all modes, 8 to 14 are used for FIQ, all others use the USER
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column. It's easier this way. old and new parameter are modes numbers.
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Notice the side effect of changing the Bank variable. */
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ARMword
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ARMul_SwitchMode (ARMul_State * state, ARMword oldmode, ARMword newmode)
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{
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unsigned i;
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ARMword oldbank;
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ARMword newbank;
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static int revision_value = 53;
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oldbank = ModeToBank (oldmode);
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newbank = state->Bank = ModeToBank (newmode);
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/* Do we really need to do it? */
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if (oldbank != newbank) {
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if (oldbank == 3 && newbank == 2) {
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//printf("icounter is %d PC is %x MODE CHANGED : %d --> %d\n", state->NumInstrs, state->pc, oldbank, newbank);
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if (state->NumInstrs >= 5832487) {
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// printf("%d, ", state->NumInstrs + revision_value);
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// printf("revision_value : %d\n", revision_value);
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revision_value ++;
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}
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}
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/* Save away the old registers. */
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switch (oldbank) {
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case USERBANK:
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case IRQBANK:
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case SVCBANK:
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case ABORTBANK:
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case UNDEFBANK:
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if (newbank == FIQBANK)
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for (i = 8; i < 13; i++)
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state->RegBank[USERBANK][i] =
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state->Reg[i];
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state->RegBank[oldbank][13] = state->Reg[13];
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state->RegBank[oldbank][14] = state->Reg[14];
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break;
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case FIQBANK:
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for (i = 8; i < 15; i++)
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state->RegBank[FIQBANK][i] = state->Reg[i];
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break;
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case DUMMYBANK:
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for (i = 8; i < 15; i++)
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state->RegBank[DUMMYBANK][i] = 0;
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break;
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default:
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abort ();
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}
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/* Restore the new registers. */
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switch (newbank) {
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case USERBANK:
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case IRQBANK:
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case SVCBANK:
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case ABORTBANK:
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case UNDEFBANK:
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if (oldbank == FIQBANK)
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for (i = 8; i < 13; i++)
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state->Reg[i] =
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state->RegBank[USERBANK][i];
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state->Reg[13] = state->RegBank[newbank][13];
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state->Reg[14] = state->RegBank[newbank][14];
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break;
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case FIQBANK:
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for (i = 8; i < 15; i++)
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state->Reg[i] = state->RegBank[FIQBANK][i];
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break;
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case DUMMYBANK:
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for (i = 8; i < 15; i++)
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state->Reg[i] = 0;
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break;
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default:
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abort ();
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}
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}
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return newmode;
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}
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/* Given a processor mode, this routine returns the
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register bank that will be accessed in that mode. */
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static ARMword
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ModeToBank (ARMword mode)
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{
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static ARMword bankofmode[] = {
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USERBANK, FIQBANK, IRQBANK, SVCBANK,
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DUMMYBANK, DUMMYBANK, DUMMYBANK, DUMMYBANK,
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DUMMYBANK, DUMMYBANK, DUMMYBANK, DUMMYBANK,
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DUMMYBANK, DUMMYBANK, DUMMYBANK, DUMMYBANK,
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USERBANK, FIQBANK, IRQBANK, SVCBANK,
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DUMMYBANK, DUMMYBANK, DUMMYBANK, ABORTBANK,
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DUMMYBANK, DUMMYBANK, DUMMYBANK, UNDEFBANK,
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DUMMYBANK, DUMMYBANK, DUMMYBANK, SYSTEMBANK
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};
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if (mode >= (sizeof (bankofmode) / sizeof (bankofmode[0])))
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return DUMMYBANK;
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return bankofmode[mode];
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}
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/* Returns the register number of the nth register in a reg list. */
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unsigned
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ARMul_NthReg (ARMword instr, unsigned number)
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{
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unsigned bit, upto;
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for (bit = 0, upto = 0; upto <= number; bit++)
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if (BIT (bit))
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upto++;
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return (bit - 1);
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}
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/* Unsigned sum of absolute difference */
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u8 ARMul_UnsignedAbsoluteDifference(u8 left, u8 right)
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{
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if (left > right)
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return left - right;
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return right - left;
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}
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/* Assigns the N and Z flags depending on the value of result. */
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void
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ARMul_NegZero (ARMul_State * state, ARMword result)
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{
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if (NEG (result)) {
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SETN;
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CLEARZ;
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} else if (result == 0) {
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CLEARN;
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SETZ;
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} else {
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CLEARN;
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CLEARZ;
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}
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}
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/* Compute whether an addition of A and B, giving RESULT, overflowed. */
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int
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AddOverflow (ARMword a, ARMword b, ARMword result)
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{
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return ((NEG (a) && NEG (b) && POS (result))
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|| (POS (a) && POS (b) && NEG (result)));
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}
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/* Compute whether a subtraction of A and B, giving RESULT, overflowed. */
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int
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SubOverflow (ARMword a, ARMword b, ARMword result)
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{
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return ((NEG (a) && POS (b) && POS (result))
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|| (POS (a) && NEG (b) && NEG (result)));
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}
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/* Assigns the C flag after an addition of a and b to give result. */
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void
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ARMul_AddCarry (ARMul_State * state, ARMword a, ARMword b, ARMword result)
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{
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ASSIGNC ((NEG (a) && NEG (b)) ||
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(NEG (a) && POS (result)) || (NEG (b) && POS (result)));
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}
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/* Assigns the V flag after an addition of a and b to give result. */
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void
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ARMul_AddOverflow (ARMul_State * state, ARMword a, ARMword b, ARMword result)
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{
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ASSIGNV (AddOverflow (a, b, result));
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}
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/* Assigns the Q flag if the given result is considered an overflow from the addition of a and b */
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void ARMul_AddOverflowQ(ARMul_State* state, ARMword a, ARMword b)
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{
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u32 result = a + b;
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if (((result ^ a) & (u32)0x80000000) && ((a ^ b) & (u32)0x80000000) == 0)
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SETQ;
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}
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/* Assigns the C flag after an subtraction of a and b to give result. */
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void
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ARMul_SubCarry (ARMul_State * state, ARMword a, ARMword b, ARMword result)
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{
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ASSIGNC ((NEG (a) && POS (b)) ||
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(NEG (a) && POS (result)) || (POS (b) && POS (result)));
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}
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/* Assigns the V flag after an subtraction of a and b to give result. */
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void
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ARMul_SubOverflow (ARMul_State * state, ARMword a, ARMword b, ARMword result)
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{
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ASSIGNV (SubOverflow (a, b, result));
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}
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/* 8-bit unsigned saturated addition */
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u8 ARMul_UnsignedSaturatedAdd8(u8 left, u8 right)
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{
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u8 result = left + right;
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if (result < left)
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result = 0xFF;
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return result;
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}
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/* 16-bit unsigned saturated addition */
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u16 ARMul_UnsignedSaturatedAdd16(u16 left, u16 right)
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{
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u16 result = left + right;
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if (result < left)
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result = 0xFFFF;
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return result;
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}
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/* 8-bit unsigned saturated subtraction */
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u8 ARMul_UnsignedSaturatedSub8(u8 left, u8 right)
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{
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if (left <= right)
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return 0;
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return left - right;
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}
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/* 16-bit unsigned saturated subtraction */
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u16 ARMul_UnsignedSaturatedSub16(u16 left, u16 right)
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{
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if (left <= right)
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return 0;
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return left - right;
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}
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/* This function does the work of generating the addresses used in an
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LDC instruction. The code here is always post-indexed, it's up to the
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caller to get the input address correct and to handle base register
|
|
modification. It also handles the Busy-Waiting. */
|
|
|
|
void
|
|
ARMul_LDC (ARMul_State * state, ARMword instr, ARMword address)
|
|
{
|
|
unsigned cpab;
|
|
ARMword data;
|
|
|
|
UNDEF_LSCPCBaseWb;
|
|
//printf("SKYEYE ARMul_LDC, CPnum is %x, instr %x, addr %x\n",CPNum, instr, address);
|
|
/*chy 2004-05-23 should update this function in the future,should concern dataabort*/
|
|
// chy 2004-05-25 , fix it now,so needn't printf
|
|
// printf("SKYEYE ARMul_LDC, should update this function!!!!!\n");
|
|
//exit(-1);
|
|
|
|
//if (!CP_ACCESS_ALLOWED (state, CPNum)) {
|
|
if (!state->LDC[CPNum]) {
|
|
/*
|
|
printf
|
|
("SKYEYE ARMul_LDC,NOT ALLOW, underinstr, CPnum is %x, instr %x, addr %x\n",
|
|
CPNum, instr, address);
|
|
*/
|
|
ARMul_UndefInstr (state, instr);
|
|
return;
|
|
}
|
|
|
|
/*if (ADDREXCEPT (address))
|
|
INTERNALABORT (address);*/
|
|
|
|
cpab = (state->LDC[CPNum]) (state, ARMul_FIRST, instr, 0);
|
|
while (cpab == ARMul_BUSY) {
|
|
ARMul_Icycles (state, 1, 0);
|
|
|
|
if (IntPending (state)) {
|
|
cpab = (state->LDC[CPNum]) (state, ARMul_INTERRUPT,
|
|
instr, 0);
|
|
return;
|
|
} else
|
|
cpab = (state->LDC[CPNum]) (state, ARMul_BUSY, instr,
|
|
0);
|
|
}
|
|
if (cpab == ARMul_CANT) {
|
|
/*
|
|
printf
|
|
("SKYEYE ARMul_LDC,NOT CAN, underinstr, CPnum is %x, instr %x, addr %x\n",
|
|
CPNum, instr, address);
|
|
*/
|
|
CPTAKEABORT;
|
|
return;
|
|
}
|
|
|
|
cpab = (state->LDC[CPNum]) (state, ARMul_TRANSFER, instr, 0);
|
|
data = ARMul_LoadWordN (state, address);
|
|
//chy 2004-05-25
|
|
if (state->abortSig || state->Aborted)
|
|
goto L_ldc_takeabort;
|
|
|
|
BUSUSEDINCPCN;
|
|
//chy 2004-05-25
|
|
/*
|
|
if (BIT (21))
|
|
LSBase = state->Base;
|
|
*/
|
|
|
|
cpab = (state->LDC[CPNum]) (state, ARMul_DATA, instr, data);
|
|
|
|
while (cpab == ARMul_INC) {
|
|
address += 4;
|
|
data = ARMul_LoadWordN (state, address);
|
|
//chy 2004-05-25
|
|
if (state->abortSig || state->Aborted)
|
|
goto L_ldc_takeabort;
|
|
|
|
cpab = (state->LDC[CPNum]) (state, ARMul_DATA, instr, data);
|
|
}
|
|
|
|
//chy 2004-05-25
|
|
L_ldc_takeabort:
|
|
if (BIT (21)) {
|
|
if (!
|
|
((state->abortSig || state->Aborted)
|
|
&& state->lateabtSig == LOW))
|
|
LSBase = state->Base;
|
|
}
|
|
|
|
if (state->abortSig || state->Aborted)
|
|
TAKEABORT;
|
|
}
|
|
|
|
/* This function does the work of generating the addresses used in an
|
|
STC instruction. The code here is always post-indexed, it's up to the
|
|
caller to get the input address correct and to handle base register
|
|
modification. It also handles the Busy-Waiting. */
|
|
|
|
void
|
|
ARMul_STC (ARMul_State * state, ARMword instr, ARMword address)
|
|
{
|
|
unsigned cpab;
|
|
ARMword data;
|
|
|
|
UNDEF_LSCPCBaseWb;
|
|
|
|
//printf("SKYEYE ARMul_STC, CPnum is %x, instr %x, addr %x\n",CPNum, instr, address);
|
|
/*chy 2004-05-23 should update this function in the future,should concern dataabort */
|
|
// skyeye_instr_debug=0;printf("SKYEYE debug end!!!!\n");
|
|
// chy 2004-05-25 , fix it now,so needn't printf
|
|
// printf("SKYEYE ARMul_STC, should update this function!!!!!\n");
|
|
|
|
//exit(-1);
|
|
//if (!CP_ACCESS_ALLOWED (state, CPNum)) {
|
|
if (!state->STC[CPNum]) {
|
|
/*
|
|
printf
|
|
("SKYEYE ARMul_STC,NOT ALLOW, undefinstr, CPnum is %x, instr %x, addr %x\n",
|
|
CPNum, instr, address);
|
|
*/
|
|
ARMul_UndefInstr (state, instr);
|
|
return;
|
|
}
|
|
|
|
/*if (ADDREXCEPT (address) || VECTORACCESS (address))
|
|
INTERNALABORT (address);*/
|
|
|
|
cpab = (state->STC[CPNum]) (state, ARMul_FIRST, instr, &data);
|
|
while (cpab == ARMul_BUSY) {
|
|
ARMul_Icycles (state, 1, 0);
|
|
if (IntPending (state)) {
|
|
cpab = (state->STC[CPNum]) (state, ARMul_INTERRUPT,
|
|
instr, 0);
|
|
return;
|
|
} else
|
|
cpab = (state->STC[CPNum]) (state, ARMul_BUSY, instr,
|
|
&data);
|
|
}
|
|
|
|
if (cpab == ARMul_CANT) {
|
|
/*
|
|
printf
|
|
("SKYEYE ARMul_STC,CANT, undefinstr, CPnum is %x, instr %x, addr %x\n",
|
|
CPNum, instr, address);
|
|
*/
|
|
CPTAKEABORT;
|
|
return;
|
|
}
|
|
/*#ifndef MODE32
|
|
if (ADDREXCEPT (address) || VECTORACCESS (address))
|
|
INTERNALABORT (address);
|
|
#endif*/
|
|
BUSUSEDINCPCN;
|
|
//chy 2004-05-25
|
|
/*
|
|
if (BIT (21))
|
|
LSBase = state->Base;
|
|
*/
|
|
cpab = (state->STC[CPNum]) (state, ARMul_DATA, instr, &data);
|
|
ARMul_StoreWordN (state, address, data);
|
|
//chy 2004-05-25
|
|
if (state->abortSig || state->Aborted)
|
|
goto L_stc_takeabort;
|
|
|
|
while (cpab == ARMul_INC) {
|
|
address += 4;
|
|
cpab = (state->STC[CPNum]) (state, ARMul_DATA, instr, &data);
|
|
ARMul_StoreWordN (state, address, data);
|
|
//chy 2004-05-25
|
|
if (state->abortSig || state->Aborted)
|
|
goto L_stc_takeabort;
|
|
}
|
|
//chy 2004-05-25
|
|
L_stc_takeabort:
|
|
if (BIT (21)) {
|
|
if (!
|
|
((state->abortSig || state->Aborted)
|
|
&& state->lateabtSig == LOW))
|
|
LSBase = state->Base;
|
|
}
|
|
|
|
if (state->abortSig || state->Aborted)
|
|
TAKEABORT;
|
|
}
|
|
|
|
/* This function does the Busy-Waiting for an MCR instruction. */
|
|
|
|
void
|
|
ARMul_MCR (ARMul_State * state, ARMword instr, ARMword source)
|
|
{
|
|
unsigned cpab;
|
|
int cm = BITS(0, 3) & 0xf;
|
|
int cp = BITS(5, 7) & 0x7;
|
|
int rd = BITS(12, 15) & 0xf;
|
|
int cn = BITS(16, 19) & 0xf;
|
|
int cpopc = BITS(21, 23) & 0x7;
|
|
|
|
if (CPNum == 15 && source == 0) //Cache flush
|
|
{
|
|
return;
|
|
}
|
|
|
|
//printf("SKYEYE ARMul_MCR, CPnum is %x, source %x\n",CPNum, source);
|
|
//if (!CP_ACCESS_ALLOWED (state, CPNum)) {
|
|
if (!state->MCR[CPNum]) {
|
|
//chy 2004-07-19 should fix in the future ????!!!!
|
|
LOG_ERROR(Core_ARM11, "SKYEYE ARMul_MCR, ACCESS_not ALLOWed, UndefinedInstr CPnum is %x, source %x",CPNum, source);
|
|
ARMul_UndefInstr (state, instr);
|
|
return;
|
|
}
|
|
|
|
//DEBUG("SKYEYE ARMul_MCR p%d, %d, r%d, c%d, c%d, %d\n", CPNum, cpopc, rd, cn, cm, cp);
|
|
//DEBUG("plutoo: MCR not implemented\n");
|
|
//exit(1);
|
|
//return;
|
|
|
|
cpab = (state->MCR[CPNum]) (state, ARMul_FIRST, instr, source);
|
|
|
|
while (cpab == ARMul_BUSY) {
|
|
ARMul_Icycles (state, 1, 0);
|
|
|
|
if (IntPending (state)) {
|
|
cpab = (state->MCR[CPNum]) (state, ARMul_INTERRUPT,
|
|
instr, 0);
|
|
return;
|
|
} else
|
|
cpab = (state->MCR[CPNum]) (state, ARMul_BUSY, instr,
|
|
source);
|
|
}
|
|
|
|
if (cpab == ARMul_CANT) {
|
|
LOG_ERROR(Core_ARM11, "SKYEYE ARMul_MCR, CANT, UndefinedInstr %x CPnum is %x, source %x", instr, CPNum, source); //ichfly todo
|
|
//ARMul_Abort (state, ARMul_UndefinedInstrV);
|
|
} else {
|
|
BUSUSEDINCPCN;
|
|
ARMul_Ccycles (state, 1, 0);
|
|
}
|
|
}
|
|
|
|
/* This function does the Busy-Waiting for an MCRR instruction. */
|
|
|
|
void
|
|
ARMul_MCRR (ARMul_State * state, ARMword instr, ARMword source1, ARMword source2)
|
|
{
|
|
unsigned cpab;
|
|
|
|
//if (!CP_ACCESS_ALLOWED (state, CPNum)) {
|
|
if (!state->MCRR[CPNum]) {
|
|
ARMul_UndefInstr (state, instr);
|
|
return;
|
|
}
|
|
|
|
cpab = (state->MCRR[CPNum]) (state, ARMul_FIRST, instr, source1, source2);
|
|
|
|
while (cpab == ARMul_BUSY) {
|
|
ARMul_Icycles (state, 1, 0);
|
|
|
|
if (IntPending (state)) {
|
|
cpab = (state->MCRR[CPNum]) (state, ARMul_INTERRUPT,
|
|
instr, 0, 0);
|
|
return;
|
|
} else
|
|
cpab = (state->MCRR[CPNum]) (state, ARMul_BUSY, instr,
|
|
source1, source2);
|
|
}
|
|
if (cpab == ARMul_CANT) {
|
|
printf ("In %s, CoProcesscor returned CANT, CPnum is %x, instr %x, source %x %x\n", __FUNCTION__, CPNum, instr, source1, source2);
|
|
ARMul_Abort (state, ARMul_UndefinedInstrV);
|
|
} else {
|
|
BUSUSEDINCPCN;
|
|
ARMul_Ccycles (state, 1, 0);
|
|
}
|
|
}
|
|
|
|
/* This function does the Busy-Waiting for an MRC instruction. */
|
|
|
|
ARMword ARMul_MRC (ARMul_State * state, ARMword instr)
|
|
{
|
|
int cm = BITS(0, 3) & 0xf;
|
|
int cp = BITS(5, 7) & 0x7;
|
|
int rd = BITS(12, 15) & 0xf;
|
|
int cn = BITS(16, 19) & 0xf;
|
|
int cpopc = BITS(21, 23) & 0x7;
|
|
|
|
if (cn == 13 && cm == 0 && cp == 3) { //c13,c0,3; returns CPU svc buffer
|
|
ARMword result = Memory::KERNEL_MEMORY_VADDR;
|
|
|
|
if (result != -1) {
|
|
return result;
|
|
}
|
|
}
|
|
|
|
//DEBUG("SKYEYE ARMul_MRC p%d, %d, r%d, c%d, c%d, %d\n", CPNum, cpopc, rd, cn, cm, cp);
|
|
//DEBUG("plutoo: MRC not implemented\n");
|
|
//return;
|
|
|
|
unsigned cpab;
|
|
ARMword result = 0;
|
|
|
|
//printf("SKYEYE ARMul_MRC, CPnum is %x, instr %x\n",CPNum, instr);
|
|
//if (!CP_ACCESS_ALLOWED (state, CPNum)) {
|
|
if (!state->MRC[CPNum]) {
|
|
//chy 2004-07-19 should fix in the future????!!!!
|
|
LOG_ERROR(Core_ARM11, "SKYEYE ARMul_MRC,NOT ALLOWed UndefInstr CPnum is %x, instr %x", CPNum, instr);
|
|
ARMul_UndefInstr (state, instr);
|
|
return -1;
|
|
}
|
|
|
|
cpab = (state->MRC[CPNum]) (state, ARMul_FIRST, instr, &result);
|
|
while (cpab == ARMul_BUSY) {
|
|
ARMul_Icycles (state, 1, 0);
|
|
if (IntPending (state)) {
|
|
cpab = (state->MRC[CPNum]) (state, ARMul_INTERRUPT,
|
|
instr, 0);
|
|
return (0);
|
|
} else
|
|
cpab = (state->MRC[CPNum]) (state, ARMul_BUSY, instr,
|
|
&result);
|
|
}
|
|
if (cpab == ARMul_CANT) {
|
|
printf ("SKYEYE ARMul_MRC,CANT UndefInstr CPnum is %x, instr %x\n", CPNum, instr);
|
|
ARMul_Abort (state, ARMul_UndefinedInstrV);
|
|
/* Parent will destroy the flags otherwise. */
|
|
result = ECC;
|
|
} else {
|
|
BUSUSEDINCPCN;
|
|
ARMul_Ccycles (state, 1, 0);
|
|
ARMul_Icycles (state, 1, 0);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* This function does the Busy-Waiting for an MRRC instruction. (to verify) */
|
|
|
|
void
|
|
ARMul_MRRC (ARMul_State * state, ARMword instr, ARMword * dest1, ARMword * dest2)
|
|
{
|
|
unsigned cpab;
|
|
ARMword result1 = 0;
|
|
ARMword result2 = 0;
|
|
|
|
//if (!CP_ACCESS_ALLOWED (state, CPNum)) {
|
|
if (!state->MRRC[CPNum]) {
|
|
ARMul_UndefInstr (state, instr);
|
|
return;
|
|
}
|
|
|
|
cpab = (state->MRRC[CPNum]) (state, ARMul_FIRST, instr, &result1, &result2);
|
|
while (cpab == ARMul_BUSY) {
|
|
ARMul_Icycles (state, 1, 0);
|
|
if (IntPending (state)) {
|
|
cpab = (state->MRRC[CPNum]) (state, ARMul_INTERRUPT,
|
|
instr, 0, 0);
|
|
return;
|
|
} else
|
|
cpab = (state->MRRC[CPNum]) (state, ARMul_BUSY, instr,
|
|
&result1, &result2);
|
|
}
|
|
if (cpab == ARMul_CANT) {
|
|
printf ("In %s, CoProcesscor returned CANT, CPnum is %x, instr %x\n", __FUNCTION__, CPNum, instr);
|
|
ARMul_Abort (state, ARMul_UndefinedInstrV);
|
|
} else {
|
|
BUSUSEDINCPCN;
|
|
ARMul_Ccycles (state, 1, 0);
|
|
ARMul_Icycles (state, 1, 0);
|
|
}
|
|
|
|
*dest1 = result1;
|
|
*dest2 = result2;
|
|
}
|
|
|
|
/* This function does the Busy-Waiting for an CDP instruction. */
|
|
|
|
void
|
|
ARMul_CDP (ARMul_State * state, ARMword instr)
|
|
{
|
|
unsigned cpab;
|
|
|
|
//if (!CP_ACCESS_ALLOWED (state, CPNum)) {
|
|
if (!state->CDP[CPNum]) {
|
|
ARMul_UndefInstr (state, instr);
|
|
return;
|
|
}
|
|
cpab = (state->CDP[CPNum]) (state, ARMul_FIRST, instr);
|
|
while (cpab == ARMul_BUSY) {
|
|
ARMul_Icycles (state, 1, 0);
|
|
if (IntPending (state)) {
|
|
cpab = (state->CDP[CPNum]) (state, ARMul_INTERRUPT,
|
|
instr);
|
|
return;
|
|
} else
|
|
cpab = (state->CDP[CPNum]) (state, ARMul_BUSY, instr);
|
|
}
|
|
if (cpab == ARMul_CANT)
|
|
ARMul_Abort (state, ARMul_UndefinedInstrV);
|
|
else
|
|
BUSUSEDN;
|
|
}
|
|
|
|
/* This function handles Undefined instructions, as CP isntruction. */
|
|
|
|
void
|
|
ARMul_UndefInstr (ARMul_State * state, ARMword instr)
|
|
{
|
|
std::string disasm = ARM_Disasm::Disassemble(state->pc, instr);
|
|
LOG_ERROR(Core_ARM11, "Undefined instruction!! Disasm: %s Opcode: 0x%x", disasm.c_str(), instr);
|
|
ARMul_Abort (state, ARMul_UndefinedInstrV);
|
|
}
|
|
|
|
/* Return TRUE if an interrupt is pending, FALSE otherwise. */
|
|
|
|
unsigned
|
|
IntPending (ARMul_State * state)
|
|
{
|
|
/* Any exceptions. */
|
|
if (state->NresetSig == LOW) {
|
|
ARMul_Abort (state, ARMul_ResetV);
|
|
return TRUE;
|
|
} else if (!state->NfiqSig && !FFLAG) {
|
|
ARMul_Abort (state, ARMul_FIQV);
|
|
return TRUE;
|
|
} else if (!state->NirqSig && !IFLAG) {
|
|
ARMul_Abort (state, ARMul_IRQV);
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
/* Align a word access to a non word boundary. */
|
|
|
|
ARMword
|
|
ARMul_Align (ARMul_State* state, ARMword address, ARMword data)
|
|
{
|
|
/* This code assumes the address is really unaligned,
|
|
as a shift by 32 is undefined in C. */
|
|
|
|
address = (address & 3) << 3; /* Get the word address. */
|
|
return ((data >> address) | (data << (32 - address))); /* rot right */
|
|
}
|
|
|
|
/* This routine is used to call another routine after a certain number of
|
|
cycles have been executed. The first parameter is the number of cycles
|
|
delay before the function is called, the second argument is a pointer
|
|
to the function. A delay of zero doesn't work, just call the function. */
|
|
|
|
void
|
|
ARMul_ScheduleEvent (ARMul_State * state, unsigned int delay,
|
|
unsigned (*what) (ARMul_State *))
|
|
{
|
|
unsigned int when;
|
|
struct EventNode *event;
|
|
|
|
if (state->EventSet++ == 0)
|
|
state->Now = ARMul_Time (state);
|
|
when = (state->Now + delay) % EVENTLISTSIZE;
|
|
event = (struct EventNode *) malloc (sizeof (struct EventNode));
|
|
if (!event) {
|
|
printf ("SKYEYE:ARMul_ScheduleEvent: malloc event error\n");
|
|
exit(-1);
|
|
//skyeye_exit (-1);
|
|
}
|
|
event->func = what;
|
|
event->next = *(state->EventPtr + when);
|
|
*(state->EventPtr + when) = event;
|
|
}
|
|
|
|
/* This routine is called at the beginning of
|
|
every cycle, to envoke scheduled events. */
|
|
|
|
void
|
|
ARMul_EnvokeEvent (ARMul_State * state)
|
|
{
|
|
static unsigned int then;
|
|
|
|
then = state->Now;
|
|
state->Now = ARMul_Time (state) % EVENTLISTSIZE;
|
|
if (then < state->Now)
|
|
/* Schedule events. */
|
|
EnvokeList (state, then, state->Now);
|
|
else if (then > state->Now) {
|
|
/* Need to wrap around the list. */
|
|
EnvokeList (state, then, EVENTLISTSIZE - 1L);
|
|
EnvokeList (state, 0L, state->Now);
|
|
}
|
|
}
|
|
|
|
/* Envokes all the entries in a range. */
|
|
|
|
static void
|
|
EnvokeList (ARMul_State * state, unsigned int from, unsigned int to)
|
|
{
|
|
for (; from <= to; from++) {
|
|
struct EventNode *anevent;
|
|
|
|
anevent = *(state->EventPtr + from);
|
|
while (anevent) {
|
|
(anevent->func) (state);
|
|
state->EventSet--;
|
|
anevent = anevent->next;
|
|
}
|
|
*(state->EventPtr + from) = NULL;
|
|
}
|
|
}
|
|
|
|
/* This routine is returns the number of clock ticks since the last reset. */
|
|
|
|
unsigned int
|
|
ARMul_Time (ARMul_State * state)
|
|
{
|
|
return (state->NumScycles + state->NumNcycles +
|
|
state->NumIcycles + state->NumCcycles + state->NumFcycles);
|
|
}
|