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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 "core/arm/skyeye_common/armdefs.h"
#include "core/arm/skyeye_common/armemu.h"
/***************************************************************************\
* Definitions for the emulator architecture *
\***************************************************************************/
void ARMul_EmulateInit();
ARMul_State* ARMul_NewState(ARMul_State* state);
void ARMul_Reset (ARMul_State* state);
unsigned ARMul_MultTable[32] = {
1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9,
10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15, 15, 16, 16, 16
};
ARMword ARMul_ImmedTable[4096]; // immediate DP LHS values
char ARMul_BitList[256]; // number of bits in a byte table
/***************************************************************************\
* Call this routine once to set up the emulator's tables. *
\***************************************************************************/
void ARMul_EmulateInit()
{
unsigned int i, j;
// the values of 12 bit dp rhs's
for (i = 0; i < 4096; i++) {
ARMul_ImmedTable[i] = ROTATER (i & 0xffL, (i >> 7L) & 0x1eL);
}
// how many bits in LSM
for (i = 0; i < 256; ARMul_BitList[i++] = 0);
for (j = 1; j < 256; j <<= 1)
for (i = 0; i < 256; i++)
if ((i & j) > 0)
ARMul_BitList[i]++;
// you always need 4 times these values
for (i = 0; i < 256; i++)
ARMul_BitList[i] *= 4;
}
/***************************************************************************\
* Returns a new instantiation of the ARMulator's state *
\***************************************************************************/
ARMul_State* ARMul_NewState(ARMul_State* state)
{
memset (state, 0, sizeof (ARMul_State));
state->Emulate = RUN;
for (unsigned int i = 0; i < 16; i++) {
state->Reg[i] = 0;
for (unsigned int j = 0; j < 7; j++)
state->RegBank[j][i] = 0;
}
for (unsigned int i = 0; i < 7; i++)
state->Spsr[i] = 0;
state->Mode = 0;
state->VectorCatch = 0;
state->Aborted = false;
state->Reseted = false;
state->Inted = 3;
state->LastInted = 3;
#ifdef ARM61
state->prog32Sig = LOW;
state->data32Sig = LOW;
#else
state->prog32Sig = HIGH;
state->data32Sig = HIGH;
#endif
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)
{
if (properties & ARM_Fix26_Prop) {
state->prog32Sig = LOW;
state->data32Sig = LOW;
} else {
state->prog32Sig = HIGH;
state->data32Sig = HIGH;
}
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_XScale = (properties & ARM_XScale_Prop) != 0;
state->is_iWMMXt = (properties & ARM_iWMMXt_Prop) != 0;
state->is_v6 = (properties & ARM_v6_Prop) != 0;
state->is_ep9312 = (properties & ARM_ep9312_Prop) != 0;
state->is_pxa27x = (properties & ARM_PXA27X_Prop) != 0;
state->is_v7 = (properties & ARM_v7_Prop) != 0;
/* Only initialse the coprocessor support once we
know what kind of chip we are dealing with. */
//ARMul_CoProInit (state);
}
/***************************************************************************\
* Call this routine to set up the initial machine state (or perform a RESET *
\***************************************************************************/
void ARMul_Reset(ARMul_State* state)
{
state->NextInstr = 0;
if (state->prog32Sig) {
state->Reg[15] = 0;
state->Cpsr = INTBITS | SVC32MODE;
state->Mode = SVC32MODE;
} else {
state->Reg[15] = R15INTBITS | SVC26MODE;
state->Cpsr = INTBITS | SVC26MODE;
state->Mode = SVC26MODE;
}
state->Bank = SVCBANK;
FLUSHPIPE;
state->EndCondition = 0;
state->ErrorCode = 0;
state->NresetSig = HIGH;
state->NfiqSig = HIGH;
state->NirqSig = HIGH;
state->NtransSig = (state->Mode & 3) ? HIGH : LOW;
state->abortSig = LOW;
state->AbortAddr = 1;
state->NumInstrs = 0;
}
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