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/*
* Copyright (c) 2010 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Gabe Black
*/
#include "arch/arm/miscregs.hh"
namespace ArmISA
{
MiscRegIndex
decodeCP15Reg(unsigned crn, unsigned opc1, unsigned crm, unsigned opc2)
{
switch (crn) {
case 0:
switch (opc1) {
case 0:
switch (crm) {
case 0:
switch (opc2) {
case 1:
return MISCREG_CTR;
case 2:
return MISCREG_TCMTR;
case 4:
return MISCREG_MPUIR;
case 5:
return MISCREG_MPIDR;
default:
return MISCREG_MIDR;
}
break;
case 1:
switch (opc2) {
case 0:
return MISCREG_ID_PFR0;
case 1:
return MISCREG_ID_PFR1;
case 2:
return MISCREG_ID_DFR0;
case 3:
return MISCREG_ID_AFR0;
case 4:
return MISCREG_ID_MMFR0;
case 5:
return MISCREG_ID_MMFR1;
case 6:
return MISCREG_ID_MMFR2;
case 7:
return MISCREG_ID_MMFR3;
}
break;
case 2:
switch (opc2) {
case 0:
return MISCREG_ID_ISAR0;
case 1:
return MISCREG_ID_ISAR1;
case 2:
return MISCREG_ID_ISAR2;
case 3:
return MISCREG_ID_ISAR3;
case 4:
return MISCREG_ID_ISAR4;
case 5:
return MISCREG_ID_ISAR5;
case 6:
case 7:
return MISCREG_RAZ; // read as zero
}
break;
default:
return MISCREG_RAZ; // read as zero
}
break;
case 1:
if (crm == 0) {
switch (opc2) {
case 0:
return MISCREG_CCSIDR;
case 1:
return MISCREG_CLIDR;
case 7:
return MISCREG_AIDR;
}
}
break;
case 2:
if (crm == 0 && opc2 == 0) {
return MISCREG_CSSELR;
}
break;
}
break;
case 1:
if (opc1 == 0 && crm == 0) {
switch (opc2) {
case 0:
return MISCREG_SCTLR;
case 1:
return MISCREG_ACTLR;
case 0x2:
return MISCREG_CPACR;
}
}
break;
case 5:
if (opc1 == 0) {
if (crm == 0) {
if (opc2 == 0) {
return MISCREG_DFSR;
} else if (opc2 == 1) {
return MISCREG_IFSR;
}
} else if (crm == 1) {
if (opc2 == 0) {
return MISCREG_ADFSR;
} else if (opc2 == 1) {
return MISCREG_AIFSR;
}
}
}
break;
case 6:
if (opc1 == 0) {
switch (crm) {
case 0:
switch (opc2) {
case 0:
return MISCREG_DFAR;
case 2:
return MISCREG_IFAR;
}
break;
case 1:
switch (opc2) {
case 0:
return MISCREG_DRBAR;
case 1:
return MISCREG_IRBAR;
case 2:
return MISCREG_DRSR;
case 3:
return MISCREG_IRSR;
case 4:
return MISCREG_DRACR;
case 5:
return MISCREG_IRACR;
}
break;
case 2:
if (opc2 == 0) {
return MISCREG_RGNR;
}
}
}
break;
case 7:
if (opc1 == 0) {
switch (crm) {
case 0:
if (opc2 == 4) {
return MISCREG_NOP;
}
break;
case 1:
switch (opc2) {
case 0:
return MISCREG_ICIALLUIS;
case 6:
return MISCREG_BPIALLIS;
}
break;
case 5:
switch (opc2) {
case 0:
return MISCREG_ICIALLU;
case 1:
return MISCREG_ICIMVAU;
case 4:
return MISCREG_CP15ISB;
case 6:
return MISCREG_BPIALL;
case 7:
return MISCREG_BPIMVA;
}
break;
case 6:
if (opc2 == 1) {
return MISCREG_DCIMVAC;
} else if (opc2 == 2) {
return MISCREG_DCISW;
}
break;
case 10:
switch (opc2) {
case 1:
return MISCREG_DCCMVAC;
case 2:
return MISCREG_MCCSW;
case 4:
return MISCREG_CP15DSB;
case 5:
return MISCREG_CP15DMB;
}
break;
case 11:
if (opc2 == 1) {
return MISCREG_DCCMVAU;
}
break;
case 13:
if (opc2 == 1) {
return MISCREG_NOP;
}
break;
case 14:
if (opc2 == 1) {
return MISCREG_DCCIMVAC;
} else if (opc2 == 2) {
return MISCREG_DCCISW;
}
break;
}
}
break;
case 9:
if (opc1 >= 0 && opc1 <= 7) {
switch (crm) {
case 0:
case 1:
case 2:
case 5:
case 6:
case 7:
case 8:
//Reserved for Branch Predictor, Cache and TCM operations
case 12:
case 13:
case 14:
case 15:
// Reserved for Performance monitors
break;
}
}
break;
case 11:
if (opc1 >= 0 && opc1 <=7) {
switch (crm) {
case 0:
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
case 7:
case 8:
case 15:
// Reserved for DMA operations for TCM access
break;
}
}
break;
case 13:
if (opc1 == 0) {
if (crm == 0) {
switch (crm) {
case 1:
return MISCREG_CONTEXTIDR;
case 2:
return MISCREG_TPIDRURW;
case 3:
return MISCREG_TPIDRURO;
case 4:
return MISCREG_TPIDRPRW;
}
}
}
break;
case 15:
// Implementation defined
break;
}
// Unrecognized register
return NUM_MISCREGS;
}
};
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