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2018-05-29arch-arm: ISA param for treating MISCREG_IMPDEF_UNIMPL as NOPGiacomo Travaglini
In the Arm ISA there are some sys reg numbers which are reserved for implementation defined registers. The default behaviour is to to treat them as unimplemented registers. It is now possible to change this behaviour at runtime and treat them as NOP. In this way an access to those register won't make simulation fail. Change-Id: I0d108299a6d5aa81fcdabdaef04eafe46df92343 Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/10504 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-04-19arch-arm: Change disassemble when MSR to UNKNOWN registerGiacomo Travaglini
This patch changes the fault being thrown when MSR/MRS to an unknown Misc register in AArch64. While previously the instruction was decoded as an Unknown instruction (hence not printing any information), it is now decoded as a FailUnimplemented and the unrecognized System register numbers (CRn, op0...) are printed. Change-Id: I205ff7adcde5934231c77e8d2250db69a34581fc Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/10061 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-04-10arch-arm: Fix mrc,mcr to cop14 disassembleGiacomo Travaglini
This patch fixes the disassemble for AArch32 mcr/mrc p14 instructions. Change-Id: If5d7c2d7c726f040ae20053bf1d70f4405b34d0e Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Curtis Dunham <curtis.dunham@arm.com> Reviewed-on: https://gem5-review.googlesource.com/9681 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-03-26arch: Fix all override related warnings.Gabe Black
Clang has started(?) reporting override related warnings, something gcc apparently did before, but was disabled in the SConstruct. Rather than disable the warnings in for clang as well, this change fixes the warnings. A future change will re-enable the warnings for gcc. Change-Id: I3cc79e45749b2ae0f9bebb1acadc56a3d3a942da Reviewed-on: https://gem5-review.googlesource.com/9343 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Gabe Black <gabeblack@google.com>
2018-03-20arch, arm: Fix implicit-fallthrough GCC warningsChun-Chen Hsu
GCC 7 generates spurious fallthrough warnings in nested switch blocks where the inner switch block return. There is already a GCC fix [1] submitted for review but, until it is merged into GCC trunk, GEM5 will not build with GCC 7 due to these fallthrough warnings. This patch silences the spurious fallthrough warnings by appending a M5_UNREACHABLE statement in the outer switch cases. Note there is another GEM5 patch [2] to fix other fallthrough warnings. [1] https://gcc.gnu.org/ml/gcc-patches/2018-02/msg01105.html [2] https://gem5-review.googlesource.com/c/public/gem5/+/8541 Change-Id: I97cd8bfa90a88e93cee60cf27a8c93611d11a242 Signed-off-by: Chun-Chen Hsu <chunchenhsu@google.com> Reviewed-on: https://gem5-review.googlesource.com/9101 Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com>
2018-03-15arm: Fix implicit-fallthrough warnings when building with gcc-7+Siddhesh Poyarekar
gcc 7 onwards have additional heuristics to detect implicit fallthroughs and it fails the build with warnings for ARM as a result. There was one gcc bug[1] that I fixed but the rest are cases that gcc cannot detect due to the point at which it does the fallthrough check. Most of this patch adds __builtin_unreachable() hints in places that throw this warning to indicate to gcc that the fallthrough will never happen. The remaining cases are actually possible fallthroughs due to incorrect code running on the simulator; in which case an Unknown instruction is returned. [1] https://gcc.gnu.org/ml/gcc-patches/2018-02/msg01105.html Change-Id: I1baa9fa0ed15181c10c755c0bd777f88b607c158 Signed-off-by: Siddhesh Poyarekar <siddhesh.poyarekar@gmail.com> Reviewed-on: https://gem5-review.googlesource.com/8541 Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com>
2018-03-14arm: Fix maybe-uninitialized GCC warningsChun-Chen Hsu
GCC 7 generates maybe-uninitialized warnings at the code that updates the "dest" variables in the writeVecElem function of neon64_mem.hh file. It is because the generated code does not appropriately initialize the output variable before passing it to the writeVecElem function. This patch initializes the output variable to fix this. Change-Id: I50a8f4e456ccdcaa3db1392ec097017450c56ecb Signed-off-by: Chun-Chen Hsu <chunchenhsu@google.com> Reviewed-on: https://gem5-review.googlesource.com/9121 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-03-14arch-arm: ERET from AArch64 to AArch32 ignore MSBsGiacomo Travaglini
The 32 most significant bits of ELR_ELx must be ignored when returning from AArch64 to AArch32. Change-Id: I412d72908997916404e16e9eeca2789a9c529e58 Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/8881 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-03-06arm: Remove ignored const qualifierSiddhesh Poyarekar
gcc8 warns about ignored const qualifiers (-Wignored-qualifiers) and that breaks builds. It was suggested that the warning be moved to Wextra[1] but that's probably not going to happen anytime soon. [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82711 Change-Id: Ib808906deb9a1c2dccb1c34b6563db0c24c66655 Signed-off-by: Siddhesh Poyarekar <siddhesh.poyarekar@gmail.com> Reviewed-on: https://gem5-review.googlesource.com/8562 Reviewed-by: Gabe Black <gabeblack@google.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-02-20arch-arm: Make hlt64 a mem barrier with semihostingGiacomo Travaglini
The HLT instruction is used to trap into semihosting. The semihosting code can change the contents of memory behind the back of the CPU, which requires instructions triggering semihosting to be non-speculative and memory barriers. Change-Id: I735166251aa194120ad49c08082d4ac65fe96524 Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/8373 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-02-20arch-arm: Add AArch32 HLT Semihosting interfaceGiacomo Travaglini
AArch32 HLT instruction is now able to issue Arm Semihosting commands as the AArch64 counterpart in either Arm and Thumb mode. Change-Id: I77da73d2e6a9288c704a5f646f4447022517ceb6 Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/8372 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-02-20arch-arm: Add AArch32 SVC Semihosting interfaceGiacomo Travaglini
AArch32 Svc instruction is now able to issue Arm Semihosting commands as the AArch64 counterpart in either Arm and Thumb mode. Change-Id: Ibe47ac23d0c26f3f819cc0e2b3ee874b5cdbb3d3 Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/8371 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-02-20arch-arm: Adding isa templates for semihosting opsGiacomo Travaglini
A new class of Semihosting constructor templates has been added. Their main purpose is to check if the Exception Generation Instructions (HLT, SVC) are actually a semihosting command. If that is the case, the IsMemBarrier flag is raised, so that in the O3 model we perform a coherent memory access during the semihosting operation. Change-Id: Ib87fdeb70ee7a930659563230a80cce0e1372c32 Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/8370 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-02-20arch-arm: HLT using immediate when checking for semihostingGiacomo Travaglini
HLT can use the immediate field when checking for semihosting, rather than re-parsing it from the machInst variable. Change-Id: I072cb100029da34d129b90c5d17e1728f9016c88 Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/8369 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-02-20arch-arm: Fix Hlt64,Svc64,Hvc64,Smc64,Brk64 disassemblyGiacomo Travaglini
This patch fixes the disassembly of AArch64 Exception Generating instructions, which were not printing the encoded immediate field. This has been accomplished by changing their underlying type to a newly defined one. Change-Id: If58ae3e620d2baa260e12ecdc850225adfcf1ee5 Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/8368 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-02-19arch-arm: Add aarch64 semihosting supportAndreas Sandberg
Add basic support for Arm Semihosting 2.0 simulation calls [1]. These calls let the guest system call a simulator or debugger to request OS-like support when running bare metal code. With the exception of SYS_SYSTEM, this implementation supports all of the Semihosting 2.0 specification in aarch64. [1] https://developer.arm.com/docs/100863/latest/preface Change-Id: I08c153c18a4a4fb9f95d318e2a029724935192a7 Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Jack Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-on: https://gem5-review.googlesource.com/8147 Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
2018-02-16arch-arm: IMPLEMENTATION DEFINED registerGiacomo Travaglini
A new pseudo register has been added to the Misc pool. It is the implementation defined register. This kinds of registers are covered by the architecture and must be treated differently than UNIMPLEMENTED registers: their access can be trapped to EL2 (See HCR.TIDCP bit in the arm arm). Some previously undecoded registers in c9,c10,c11 have now this register type. Change-Id: Ibfc35982470b9dea0ecf39aaa6b1012a21852f53 Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/7922 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-02-16arch-arm: Fix big endian support in {Load,Store}Double64Chuan Zhu
{Load, Store}Double64 didn't consider some of the big-endian situations. Added big-endian related data conversions to correct them. Change-Id: I8840613f94446e6042276779d1f02350ab57987f Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/8145 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-02-16arch-arm: Decode Brk64 instructionsAndreas Sandberg
The brk instruction in aarch64 was decoded as an unimplemented instruction. Fix that. Change-Id: I3eb36a016ab56d882426c5cdef3a0b594de0f9cd Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Jack Travaglini <giacomo.travaglini@arm.com> Reviewed-on: https://gem5-review.googlesource.com/8142 Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
2018-02-07arch-arm: Change the type of fault for dc ivac instructionsNikos Nikoleris
Change-Id: I00f957a3bc4721a66db62b1257f10e9019a94608 Reviewed-by: Jack Travaglini <giacomo.travaglini@arm.com> Reviewed-on: https://gem5-review.googlesource.com/7829 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
2018-02-07arch-arm: Unify permission checks for dc * instructionsNikos Nikoleris
Change-Id: Ib47f4134e3f0a580e5356d384a5d3b293c1af7be Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/7828 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-02-07arch-arm: Turn dc ivac to dc civac when some conditions are metNikos Nikoleris
The Arm ARM defines that at EL1 a data cache invalidate instruction performs a data cache clean and invalidate operation if all of the following apply: * EL2 is implemented, * HCR_EL2.VM is set to 1, * SCR_EL3.NS is set to 1 or EL3 is not implemented. This changeset implements this behavior. Change-Id: I6b6aef2f4b1e7eb107c069fdb0a10f4aa8e6b196 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/7826 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-02-07arch-arm: Fix printing of the data cache maintenance instructionsNikos Nikoleris
Change-Id: I2322c7bf65b38cb07a1ea2b5dc25dfc5a0496cf0 Reviewed-by: Jack Travaglini <giacomo.travaglini@arm.com> Reviewed-on: https://gem5-review.googlesource.com/7825 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
2018-02-07arch-arm: Fix cache line size for cache maintenace instNikos Nikoleris
Cache maintenance operations operate on whole cache blocks. This changeset uses the system cache line size as the size of the cache maintenance requests and masks the lower bits of the effective address. Change-Id: I6e7aefff51670c8cac39e4e73db21a0c5a0b7aef Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/7824 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-02-07arch-arm: Change function name for banked miscregsGiacomo Travaglini
This commit changes the function's name used for retrieving the index of a security banked register given the flatten index. This will avoid confusion with flattenRegId, which has a different purpose. Change-Id: I470ffb55916cb7fc9f78e071a7f2e609c1829f1a Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-on: https://gem5-review.googlesource.com/7982 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-02-07arch-arm: Fix AArch32 SETEND InstructionGiacomo Travaglini
This patch fixes AArch32 SETEND instruction, which was previously executed unconditionally without checking (H)SCTLR.SED field. This bit enables/disables the trapping of the instruction. Change-Id: Ib3d2194c8d16c34ec2a9ab3e8090081900c1e42e Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-on: https://gem5-review.googlesource.com/7981 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2018-02-05arch-arm: Removing Serializing flag from ISBGiacomo Travaglini
ISB Serializing behaviour is guaranteed by IsSquashAfter, which is inherently serializing; when instruction is commited, consecutive instructions are flushed and refetched. Change-Id: I05e61b4cf9f01113d95b1502c996d04cbd69b759 Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/5701 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2017-12-21arch-arm: Fixed WFE/WFI trapping behaviourGiacomo Travaglini
This patch fixes the WFx trapping behaviour by introducing the arm arm v8 pseudocode functions: checkForWFxTrap32 and checkForWFxTrap64 Change-Id: I3db0d78b5c4ad46860e6d199c2f2fc7b41842840 Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/6622 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2017-12-13arm,sparc,x86,base,cpu,sim: Replace the Twin(32|64)_t types with.Gabe Black
Replace them with std::array<>s. Change-Id: I76624c87a1cd9b21c386a96147a18de92b8a8a34 Reviewed-on: https://gem5-review.googlesource.com/6602 Maintainer: Gabe Black <gabeblack@google.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
2017-12-05arm: Add support for the dc {civac, cvac, cvau, ivac} instrNikos Nikoleris
This patch adds support for decoding and executing the following ARMv8 cache maintenance instructions by Virtual Address: * dc civac: Clean and Invalidate by Virtual Address to the Point of Coherency * dc cvac: Clean by Virtual Address to the Point of Coherency * dc cvau: Clean by Virtual Address to the Point of Unification * dc ivac: Invalidate by Virtual Addrsess to the Point of Coherency Change-Id: I58cabda37f9636105fda1b1e84a0a04965fb5670 Reviewed-by: Sudhanshu Jha <sudhanshu.jha@arm.com> Reviewed-by: Stephan Diestelhorst <stephan.diestelhorst@arm.com> Reviewed-on: https://gem5-review.googlesource.com/5060 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
2017-12-05arm: Add support for the mcr dc{ic,i,c}mvac, dccmvau instructionsNikos Nikoleris
This patch adds support for the ARMv7 cache maintenance intructions: * mcr dccmvac cleans a VA to the PoC * mcr dcimvac invalidates a VA to the PoC * mcr dccimvac cleans and invalidates a VA to the PoC * mcr dccmvau cleans a VA to the PoU Change-Id: I6511f203039ca145cc9128ddf61d09d6d7e40c10 Reviewed-by: Stephan Diestelhorst <stephan.diestelhorst@arm.com> Reviewed-by: Anouk Van Laer <anouk.vanlaer@arm.com> Reviewed-on: https://gem5-review.googlesource.com/5059 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
2017-11-22arch-arm: Add support for the brk instructionAndreas Sandberg
Add support for software breakpoints as signalled by the aarch64 brk instruction. This introduces a new SoftwareBreakpoint fault. Change-Id: I93646c3298e09d7f7b0983108ba8937c7331297a Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Giacomo Gabrielli <giacomo.gabrielli@arm.com> Reviewed-on: https://gem5-review.googlesource.com/5721 Reviewed-by: Giacomo Gabrielli <Giacomo.Gabrielli@arm.com>
2017-11-22arch-arm: HVC instruction undefined in secure EL1Giacomo Travaglini
Since EL2 is not available in secure mode, any HVC call from secure mode should be treated as undefined. This behaviour was implemented in aarch32 HVC but not in 64 bit version Change-Id: Ibaa4d8b1e8fe01d2ba3ef07494c09a4d3e7e87b0 Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/5921 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2017-11-21arch-arm: Fix MSR/MRS disassembleGiacomo Travaglini
This patch is fixing the Aarch64 MSR/MRS disassemble, which was previously printing unexisting integer registers as source/destination operands rather than the system register name Change-Id: Iac9d5f2f2fea85abd9a398320ef7aa4844d43c0e Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-on: https://gem5-review.googlesource.com/5861 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2017-11-15arch-arm: Dsb instruction shouldn't flush the pipelineGiacomo Travaglini
DSB Instruction shouldn't flush the pipeline, hence the IsSquashAfter attribute will be removed for either the 32 and 64 bit version. Change-Id: I98b2b8bc78aa28445ed1a9b5f34645f8d71616ad Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Giacomo Gabrielli <giacomo.gabrielli@arm.com> Reviewed-on: https://gem5-review.googlesource.com/5363 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2017-11-15arch-arm: Removing FlushPipe fault, using SquashAfterGiacomo Travaglini
This Patch is removing the FlushPipe ArmFault, which was used for flushing the pipeline in favour of the general IsSquashAfter StaticInstr flag. Using a fault was preventing tracers from tracing barriers like ISB and from adding them to the instruction count Change-Id: I176e9254eca904694f2f611eb486c55e50ec61ff Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Giacomo Gabrielli <giacomo.gabrielli@arm.com> Reviewed-on: https://gem5-review.googlesource.com/5361 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2017-11-15arm: Add support for armv8 CRC32 instructionsGiacomo Travaglini
This patch introduces the ARM A32/T32/A64 CRC Instructions, which are mandatory since ARMv8.1. The UNPREDICTABLE behaviours are implemented as follows: 1) CRC32(C)X (64 bit) instructions are decoded as Undefined in Aarch32 2) The instructions support predication in Aarch32 3) Using R15(PC) as source/dest operand is permitted in Aarch32 Change-Id: Iaf29b05874e1370c7615da79a07f111ded17b6cc Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-by: Giacomo Gabrielli <giacomo.gabrielli@arm.com> Reviewed-on: https://gem5-review.googlesource.com/5521 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2017-11-13arch-arm: Corrected encoding for T32 HVC instructionGiacomo Travaglini
This patch corrects the encoding of the HVC (Hypervisor Call) for the T32 instruction set. Change-Id: I6f77eaf5c586697e9ccd588419c61e6d90c6c7bf Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Chuan Zhu <chuan.zhu@arm.com> Reviewed-on: https://gem5-review.googlesource.com/5541 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
2017-11-07alpha,arm,mips,power,riscv,sparc,x86: Merge exec decl templates.Gabe Black
In the ISA instruction definitions, some classes were declared with execute, etc., functions outside of the main template because they had CPU specific signatures and would need to be duplicated with each CPU plugged into them. Now that the instructions always just use an ExecContext, there's no reason for those templates to be separate. This change folds those templates together. Change-Id: I13bda247d3d1cc07c0ea06968e48aa5b4aace7fa Reviewed-on: https://gem5-review.googlesource.com/5401 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Alec Roelke <ar4jc@virginia.edu> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2017-11-02alpha,arm,mips,power,riscv,sparc,x86,isa: De-specialize ExecContexts.Gabe Black
The ISA parser used to generate different copies of exec functions for each exec context class a particular CPU wanted to use. That's since been changed so that those functions take a pointer to the base ExecContext, so the code which would generate those extra functions can be removed, and some functions which used to be templated on an ExecContext subclass can be untemplated, or minimally less templated. Now that some functions aren't going to be instantiated multiple times with different signatures, there are also opportunities to collapse templates and make many instruction definitions simpler within the parser. Since those changes will be less mechanical, they're left for later changes and will probably be done in smaller increments. Change-Id: I0015307bb02dfb9c60380b56d2a820f12169ebea Reviewed-on: https://gem5-review.googlesource.com/5381 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2017-10-20arch-arm: RBIT instruction using mirroring funcGiacomo Travaglini
The high speed bit-reversing function is now used for the Aarch64/32 RBIT instruction implementation. Change-Id: Id5a8a93d928d00fd33ec4061fbb586b8420a1c1b Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/5262 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
2017-10-13arch-arm: Signal an event when executing store exclusivesNikos Nikoleris
When a store exclusive is executed, whether it is successful or not, the exclusives monitor is cleared and therefore we need to signal an event for the PE. Change-Id: I383c88c769c0ac5f5d36c4b5d39c9681134d3a20 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/4480 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2017-08-01arch-arm: Use named constants for m5op instructionsAndreas Sandberg
Change-Id: I544519c4f87e50cc02af29cbb3edc31ecf726e8e Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-on: https://gem5-review.googlesource.com/4263 Reviewed-by: Gabe Black <gabeblack@google.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
2017-07-13arch-arm: fix ldm of pc interswitching branchGedare Bloom
The LDM instruction that loads to the PC causes a branch to the instruction. In ARMv5T+ the branch can interswitch Thumb and ARM modes. The interswitch is broken prior to this commit, with LDM to the PC ignoring the switch. Change-Id: I6aad073206743f3435c9923e3e2218bfe32c7e05 Reviewed-on: https://gem5-review.googlesource.com/3520 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
2017-07-05arch: ISA parser additions of vector registersRekai Gonzalez-Alberquilla
Reiley's update :) of the isa parser definitions. My addition of the vector element operand concept for the ISA parser. Nathanael's modification creating a hierarchy between vector registers and its constituencies to the isa parser. Some fixes/updates on top to consider instructions as vectors instead of floating when they use the VectorRF. Some counters added to all the models to keep faithful counts. Change-Id: Id8f162a525240dfd7ba884c5a4d9fa69f4050101 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/2706 Reviewed-by: Anthony Gutierrez <anthony.gutierrez@amd.com> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2017-07-05cpu: Simplify the rename interface and use RegIdRekai Gonzalez-Alberquilla
With the hierarchical RegId there are a lot of functions that are redundant now. The idea behind the simplification is that instead of having the regId, telling which kind of register read/write/rename/lookup/etc. and then the function panic_if'ing if the regId is not of the appropriate type, we provide an interface that decides what kind of register to read depending on the register type of the given regId. Change-Id: I7d52e9e21fc01205ae365d86921a4ceb67a57178 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> [ Fix RISCV build issues ] Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/2702
2017-05-23arch-arm: Fix some poorly done type max and min in NEONRekai Gonzalez-Alberquilla
The ISA code for ARM calculates min and max elements for types using bit manipulation. That triggers some warnings, treated as errors, as the compiler can tell that there is an overflow and the sign flips. Fixed using standard lib definitions instead. Change-Id: Ie2331b410c7f76d4bd87da5afe9edf20c8ac91b3 Reviewed-by: Giacomo Gabrielli <giacomo.gabrielli@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/3481 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
2017-05-19base, sim, arch: Fix clang 5.0 warningsAndreas Sandberg
Compiling gem5 with recent version of clang (4 and 5) triggers warnings that are treated as errors: * Global templatized static functions result in a warning if they are not used. These should either be declared as static inline or without the static identifier to avoid the warning. * Some templatized classes contain static variables. The instantiated versions of these variables / templates need to be explicitly declared to avoid a compiler warning. Change-Id: Ie8261144836e94ebab7ea04ccccb90927672c257 Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Curtis Dunham <curtis.dunham@arm.com> Reviewed-on: https://gem5-review.googlesource.com/3420 Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
2017-04-03arm: Don't panic when checking coprocessor read/write permissionsNikos Nikoleris
Instructions that use the coprocessor interface check the current program status to determine whether the current context has the priviledges to read from/write to the coprocessor. Some modes allow the execution of coprocessor instructions, some others do not allow it, while some other modes are unexpected (e.g., executing an AArch32 instruction while being in an AArch64 mode). Previously we would unconditionally trigger a panic if we were in an unexpected mode. This change removes the panic and replaces it with an Undefined Instruction fault that triggers if and when a coprocessor instruction commits in an unexpected mode. This allows speculative coprocessor instructions from unexpected modes to execute but prevents them from gettting committed. Change-Id: If2776d5bae2471cdbaf76d0e1ae655f501bfbf01 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Rekai Gonzalez Alberquilla <rekai.gonzalezalberquilla@arm.com> Reviewed-on: https://gem5-review.googlesource.com/2281 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Weiping Liao <weipingliao@google.com>
2017-02-21arm: Fix DPRINTFs with arguments in the instruction declarationsNikos Nikoleris
Change-Id: I0e373536897aa5bb4501b00945c2a0836100ddf4 Reviewed-by: Curtis Dunham <curtis.dunham@arm.com> Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
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