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/* arminit.c -- ARMulator initialization: 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. */
#include <cstring>
#include "core/arm/skyeye_common/armdefs.h"
#include "core/arm/skyeye_common/vfp/vfp.h"
/***************************************************************************\
* Returns a new instantiation of the ARMulator's state *
\***************************************************************************/
ARMul_State* ARMul_NewState(ARMul_State* state)
{
state->Emulate = RUN;
state->Mode = USER32MODE;
state->lateabtSig = HIGH;
state->bigendSig = LOW;
return state;
}
/***************************************************************************\
* Call this routine to set ARMulator to model a certain processor *
\***************************************************************************/
void ARMul_SelectProcessor(ARMul_State* state, unsigned properties)
{
state->is_v4 = (properties & (ARM_v4_Prop | ARM_v5_Prop)) != 0;
state->is_v5 = (properties & ARM_v5_Prop) != 0;
state->is_v5e = (properties & ARM_v5e_Prop) != 0;
state->is_v6 = (properties & ARM_v6_Prop) != 0;
state->is_v7 = (properties & ARM_v7_Prop) != 0;
}
// Resets certain MPCore CP15 values to their ARM-defined reset values.
static void ResetMPCoreCP15Registers(ARMul_State* cpu)
{
// c0
cpu->CP15[CP15_MAIN_ID] = 0x410FB024;
cpu->CP15[CP15_TLB_TYPE] = 0x00000800;
cpu->CP15[CP15_PROCESSOR_FEATURE_0] = 0x00000111;
cpu->CP15[CP15_PROCESSOR_FEATURE_1] = 0x00000001;
cpu->CP15[CP15_DEBUG_FEATURE_0] = 0x00000002;
cpu->CP15[CP15_MEMORY_MODEL_FEATURE_0] = 0x01100103;
cpu->CP15[CP15_MEMORY_MODEL_FEATURE_1] = 0x10020302;
cpu->CP15[CP15_MEMORY_MODEL_FEATURE_2] = 0x01222000;
cpu->CP15[CP15_MEMORY_MODEL_FEATURE_3] = 0x00000000;
cpu->CP15[CP15_ISA_FEATURE_0] = 0x00100011;
cpu->CP15[CP15_ISA_FEATURE_1] = 0x12002111;
cpu->CP15[CP15_ISA_FEATURE_2] = 0x11221011;
cpu->CP15[CP15_ISA_FEATURE_3] = 0x01102131;
cpu->CP15[CP15_ISA_FEATURE_4] = 0x00000141;
// c1
cpu->CP15[CP15_CONTROL] = 0x00054078;
cpu->CP15[CP15_AUXILIARY_CONTROL] = 0x0000000F;
cpu->CP15[CP15_COPROCESSOR_ACCESS_CONTROL] = 0x00000000;
// c2
cpu->CP15[CP15_TRANSLATION_BASE_TABLE_0] = 0x00000000;
cpu->CP15[CP15_TRANSLATION_BASE_TABLE_1] = 0x00000000;
cpu->CP15[CP15_TRANSLATION_BASE_CONTROL] = 0x00000000;
// c3
cpu->CP15[CP15_DOMAIN_ACCESS_CONTROL] = 0x00000000;
// c7
cpu->CP15[CP15_PHYS_ADDRESS] = 0x00000000;
// c9
cpu->CP15[CP15_DATA_CACHE_LOCKDOWN] = 0xFFFFFFF0;
// c10
cpu->CP15[CP15_TLB_LOCKDOWN] = 0x00000000;
cpu->CP15[CP15_PRIMARY_REGION_REMAP] = 0x00098AA4;
cpu->CP15[CP15_NORMAL_REGION_REMAP] = 0x44E048E0;
// c13
cpu->CP15[CP15_PID] = 0x00000000;
cpu->CP15[CP15_CONTEXT_ID] = 0x00000000;
cpu->CP15[CP15_THREAD_UPRW] = 0x00000000;
cpu->CP15[CP15_THREAD_URO] = 0x00000000;
cpu->CP15[CP15_THREAD_PRW] = 0x00000000;
// c15
cpu->CP15[CP15_PERFORMANCE_MONITOR_CONTROL] = 0x00000000;
cpu->CP15[CP15_MAIN_TLB_LOCKDOWN_VIRT_ADDRESS] = 0x00000000;
cpu->CP15[CP15_MAIN_TLB_LOCKDOWN_PHYS_ADDRESS] = 0x00000000;
cpu->CP15[CP15_MAIN_TLB_LOCKDOWN_ATTRIBUTE] = 0x00000000;
cpu->CP15[CP15_TLB_DEBUG_CONTROL] = 0x00000000;
}
/***************************************************************************\
* Call this routine to set up the initial machine state (or perform a RESET *
\***************************************************************************/
void ARMul_Reset(ARMul_State* state)
{
VFPInit(state);
state->Reg[15] = 0;
state->Cpsr = INTBITS | SVC32MODE;
state->Mode = SVC32MODE;
state->Bank = SVCBANK;
ResetMPCoreCP15Registers(state);
state->NresetSig = HIGH;
state->NfiqSig = HIGH;
state->NirqSig = HIGH;
state->NtransSig = (state->Mode & 3) ? HIGH : LOW;
state->abortSig = LOW;
state->NumInstrs = 0;
}
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