/* * Copyright (c) 2003-2005 The Regents of The University of Michigan * All rights reserved. * * 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 * Ali Saidi */ #ifndef __ARCH_SPARC_MISCREGFILE_HH__ #define __ARCH_SPARC_MISCREGFILE_HH__ #include "arch/sparc/faults.hh" #include "arch/sparc/isa_traits.hh" #include "arch/sparc/types.hh" #include namespace SparcISA { //These functions map register indices to names std::string getMiscRegName(RegIndex); const int AsrStart = 0; const int PrStart = 32; const int HprStart = 64; const int MiscStart = 96; enum MiscRegIndex { /** Ancillary State Registers */ MISCREG_Y = AsrStart + 0, MISCREG_CCR = AsrStart + 2, MISCREG_ASI = AsrStart + 3, MISCREG_TICK = AsrStart + 4, MISCREG_FPRS = AsrStart + 6, MISCREG_PCR = AsrStart + 16, MISCREG_PIC = AsrStart + 17, MISCREG_GSR = AsrStart + 19, MISCREG_SOFTINT_SET = AsrStart + 20, MISCREG_SOFTINT_CLR = AsrStart + 21, MISCREG_SOFTINT = AsrStart + 22, MISCREG_TICK_CMPR = AsrStart + 23, MISCREG_STICK = AsrStart + 24, MISCREG_STICK_CMPR = AsrStart + 25, /** Privilged Registers */ MISCREG_TPC = PrStart + 0, MISCREG_TNPC = PrStart + 1, MISCREG_TSTATE = PrStart + 2, MISCREG_TT = PrStart + 3, MISCREG_PRIVTICK = PrStart + 4, MISCREG_TBA = PrStart + 5, MISCREG_PSTATE = PrStart + 6, MISCREG_TL = PrStart + 7, MISCREG_PIL = PrStart + 8, MISCREG_CWP = PrStart + 9, MISCREG_CANSAVE = PrStart + 10, MISCREG_CANRESTORE = PrStart + 11, MISCREG_CLEANWIN = PrStart + 12, MISCREG_OTHERWIN = PrStart + 13, MISCREG_WSTATE = PrStart + 14, MISCREG_GL = PrStart + 16, /** Hyper privileged registers */ MISCREG_HPSTATE = HprStart + 0, MISCREG_HTSTATE = HprStart + 1, MISCREG_HINTP = HprStart + 3, MISCREG_HTBA = HprStart + 5, MISCREG_HVER = HprStart + 6, MISCREG_STRAND_STS_REG = HprStart + 16, MISCREG_HSTICK_CMPR = HprStart + 31, /** Floating Point Status Register */ MISCREG_FSR = MiscStart + 0 }; // The control registers, broken out into fields class MiscRegFile { private: /* ASR Registers */ union { uint64_t y; // Y (used in obsolete multiplication) struct { uint64_t value:32; // The actual value stored in y uint64_t :32; // reserved bits } yFields; }; union { uint8_t ccr; // Condition Code Register struct { union { uint8_t icc:4; // 32-bit condition codes struct { uint8_t c:1; // Carry uint8_t v:1; // Overflow uint8_t z:1; // Zero uint8_t n:1; // Negative } iccFields; }; union { uint8_t xcc:4; // 64-bit condition codes struct { uint8_t c:1; // Carry uint8_t v:1; // Overflow uint8_t z:1; // Zero uint8_t n:1; // Negative } xccFields; }; } ccrFields; }; uint8_t asi; // Address Space Identifier union { uint64_t tick; // Hardware clock-tick counter struct { int64_t counter:63; // Clock-tick count uint64_t npt:1; // Non-priveleged trap } tickFields; }; union { uint8_t fprs; // Floating-Point Register State struct { uint8_t dl:1; // Dirty lower uint8_t du:1; // Dirty upper uint8_t fef:1; // FPRS enable floating-Point } fprsFields; }; union { uint64_t gsr; //General Status Register struct { uint64_t mask:32; uint64_t :4; uint64_t im:1; uint64_t irnd:2; uint64_t :17; uint64_t scale:5; uint64_t align:3; } gsrFields; }; union { uint64_t softint; struct { uint64_t tm:1; uint64_t int_level:14; uint64_t sm:1; } softintFields; }; union { uint64_t tick_cmpr; // Hardware tick compare registers struct { uint64_t tick_cmpr:63; // Clock-tick count uint64_t int_dis:1; // Non-priveleged trap } tick_cmprFields; }; union { uint64_t stick; // Hardware clock-tick counter struct { int64_t :63; // Not used, storage in SparcSystem uint64_t npt:1; // Non-priveleged trap } stickFields; }; union { uint64_t stick_cmpr; // Hardware tick compare registers struct { uint64_t tick_cmpr:63; // Clock-tick count uint64_t int_dis:1; // Non-priveleged trap } stick_cmprFields; }; /* Privileged Registers */ uint64_t tpc[MaxTL]; // Trap Program Counter (value from // previous trap level) uint64_t tnpc[MaxTL]; // Trap Next Program Counter (value from // previous trap level) union { uint64_t tstate[MaxTL]; // Trap State struct { //Values are from previous trap level uint64_t cwp:5; // Current Window Pointer uint64_t :3; // Reserved bits uint64_t pstate:13; // Process State uint64_t :3; // Reserved bits uint64_t asi:8; // Address Space Identifier uint64_t ccr:8; // Condition Code Register uint64_t gl:8; // Global level } tstateFields[MaxTL]; }; uint16_t tt[MaxTL]; // Trap Type (Type of trap which occured // on the previous level) uint64_t tba; // Trap Base Address union { uint16_t pstate; // Process State Register struct { uint16_t :1; // reserved uint16_t ie:1; // Interrupt enable uint16_t priv:1; // Privelege mode uint16_t am:1; // Address mask uint16_t pef:1; // PSTATE enable floating-point uint16_t :1; // reserved2 uint16_t mm:2; // Memory Model uint16_t tle:1; // Trap little-endian uint16_t cle:1; // Current little-endian } pstateFields; }; uint8_t tl; // Trap Level uint8_t pil; // Process Interrupt Register uint8_t cwp; // Current Window Pointer uint8_t cansave; // Savable windows uint8_t canrestore; // Restorable windows uint8_t cleanwin; // Clean windows uint8_t otherwin; // Other windows union { uint8_t wstate; // Window State struct { uint8_t normal:3; // Bits TT<4:2> are set to on a normal // register window trap uint8_t other:3; // Bits TT<4:2> are set to on an "otherwin" // register window trap } wstateFields; }; uint8_t gl; // Global level register /** Hyperprivileged Registers */ union { uint64_t hpstate; // Hyperprivileged State Register struct { uint8_t tlz: 1; uint8_t :1; uint8_t hpriv:1; uint8_t :2; uint8_t red:1; uint8_t :4; uint8_t ibe:1; uint8_t id:1; } hpstateFields; }; uint64_t htstate[MaxTL]; // Hyperprivileged Trap State Register uint64_t hintp; uint64_t htba; // Hyperprivileged Trap Base Address register union { uint64_t hstick_cmpr; // Hardware tick compare registers struct { uint64_t tick_cmpr:63; // Clock-tick count uint64_t int_dis:1; // Non-priveleged trap } hstick_cmprFields; }; uint64_t strandStatusReg; // Per strand status register /** Floating point misc registers. */ union { uint64_t fsr; // Floating-Point State Register struct { union { uint64_t cexc:5; // Current excpetion struct { uint64_t nxc:1; // Inexact uint64_t dzc:1; // Divide by zero uint64_t ufc:1; // Underflow uint64_t ofc:1; // Overflow uint64_t nvc:1; // Invalid operand } cexcFields; }; union { uint64_t aexc:5; // Accrued exception struct { uint64_t nxc:1; // Inexact uint64_t dzc:1; // Divide by zero uint64_t ufc:1; // Underflow uint64_t ofc:1; // Overflow uint64_t nvc:1; // Invalid operand } aexcFields; }; uint64_t fcc0:2; // Floating-Point condtion codes uint64_t :1; // Reserved bits uint64_t qne:1; // Deferred trap queue not empty // with no queue, it should read 0 uint64_t ftt:3; // Floating-Point trap type uint64_t ver:3; // Version (of the FPU) uint64_t :2; // Reserved bits uint64_t ns:1; // Nonstandard floating point union { uint64_t tem:5; // Trap Enable Mask struct { uint64_t nxm:1; // Inexact uint64_t dzm:1; // Divide by zero uint64_t ufm:1; // Underflow uint64_t ofm:1; // Overflow uint64_t nvm:1; // Invalid operand } temFields; }; uint64_t :2; // Reserved bits uint64_t rd:2; // Rounding direction uint64_t fcc1:2; // Floating-Point condition codes uint64_t fcc2:2; // Floating-Point condition codes uint64_t fcc3:2; // Floating-Point condition codes uint64_t :26; // Reserved bits } fsrFields; }; // These need to check the int_dis field and if 0 then // set appropriate bit in softint and checkinterrutps on the cpu #if FULL_SYSTEM /** Process a tick compare event and generate an interrupt on the cpu if * appropriate. */ void processTickCompare(ThreadContext *tc); void processSTickCompare(ThreadContext *tc); void processHSTickCompare(ThreadContext *tc); typedef CpuEventWrapper TickCompareEvent; TickCompareEvent *tickCompare; typedef CpuEventWrapper STickCompareEvent; STickCompareEvent *sTickCompare; typedef CpuEventWrapper HSTickCompareEvent; HSTickCompareEvent *hSTickCompare; /** Fullsystem only register version of ReadRegWithEffect() */ MiscReg readFSRegWithEffect(int miscReg, Fault &fault, ThreadContext *tc); /** Fullsystem only register version of SetRegWithEffect() */ Fault setFSRegWithEffect(int miscReg, const MiscReg &val, ThreadContext * tc); #endif public: void reset(); MiscRegFile() { reset(); } /** read a value out of an either an SE or FS IPR. No checking is done * about SE vs. FS as this is mostly used to copy the regfile. Thus more * register are copied that are necessary for FS. However this prevents * a bunch of ifdefs and is rarely called so is not performance * criticial. */ MiscReg readReg(int miscReg); /** Read a value from an IPR. Only the SE iprs are here and the rest * are are readFSRegWithEffect (which is called by readRegWithEffect()). * Checking is done for permission based on state bits in the miscreg * file. */ MiscReg readRegWithEffect(int miscReg, Fault &fault, ThreadContext *tc); /** write a value into an either an SE or FS IPR. No checking is done * about SE vs. FS as this is mostly used to copy the regfile. Thus more * register are copied that are necessary for FS. However this prevents * a bunch of ifdefs and is rarely called so is not performance * criticial.*/ Fault setReg(int miscReg, const MiscReg &val); /** Write a value into an IPR. Only the SE iprs are here and the rest * are are setFSRegWithEffect (which is called by setRegWithEffect()). * Checking is done for permission based on state bits in the miscreg * file. */ Fault setRegWithEffect(int miscReg, const MiscReg &val, ThreadContext * tc); void serialize(std::ostream & os); void unserialize(Checkpoint * cp, const std::string & section); void copyMiscRegs(ThreadContext * tc); protected: bool isHyperPriv() { return hpstateFields.hpriv; } bool isPriv() { return hpstateFields.hpriv || pstateFields.priv; } bool isNonPriv() { return !isPriv(); } }; } #endif