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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>
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This patch introduces the TLB IPA-Based invalidating instructions in
aarch32. In the entry selection policy the level of translation is not
taken into account.
This means that no difference stands between (e.g.) TLBIIPAS2 and
TLBIPAS2L.
Change-Id: Ieeb54665480874d2041056f356d86448c45043cb
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/8822
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
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In the pool of TLB Invalidate system register a category of instruction
was missing: the ones operating on entries added to the TLB during the
last level only of a table walk. (E.g. TLBIVMAL). This patch is not
considering this matching criteria when invalidating the entries and it
is rather performing the invalidation on all levels.
Change-Id: I5f2186cfdd73793e76c90b260f7128be187903fe
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/8821
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
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Previous code was aborting simulation when a debug exception taken in
aarch64 mode was encountered. This because an invalid (0xff)
instruction fault status code was produced.
Change-Id: I289f93f672be70cfbdc404be536809835160bdaf
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/8363
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
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The fault status code generated by a Prefetch/Data Fault was containing
a wrong value when the fault was triggered in aarch32 but handled in
aarch64. This because the encoding differs between the two ISAs and the
encoder was just checking the starting ISA rather than the the ending
one. In this case the getFsr must be called after we know which is the
ending ISA, which happens only after ArmFault::invoke gets called. The
fsc update hence happens before writing into the Syndrome register.
Change-Id: I725f12b6dcc0178f608233bd3d15e466d1cd1ffc
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/8362
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
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There is a set of internal variables in ArmFault thats get updated once
the fault is invoked (ArmFault::invoke). Sometimes we rely on those even
if the fault is generated but not invoked (e.g. when checking if a
memory access is producing a fault). This patch is moving the update
functionalities inside a public method so that a client can make use of
it even when not invoking the fault.
Change-Id: I3ac5b6835023f28ec569fe25487dffa356e1b2fd
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/8361
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
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This patch enables PCAlignmentFault routing to Hypervisor in case
HCR_EL2.TGE == 1, as is happening for other arm exceptions.
Change-Id: I48364ef1a0bcb5d030135221ae4bc6429e32759e
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/8841
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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Arm Semihosting is not available in syscall emulation since we don't
have an Arm system in that scenario. Trying to use it in "se" mode will
make getArmSystem assertion fail.
Change-Id: I4cf49ae801ec6e6c93134ac6ae2a0f412040684c
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/8367
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
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The semihosting component currently issues non-secure memory accesses
using the standard port proxy. This doesn't work when the guest is
running in secure state.
Change-Id: Id34b142cfcd9d77b455c040ae7f7397c29aebbc6
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Jack Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/8365
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
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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>
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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>
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A new identifier has been introduced: NUM_PHYS_MISCREGS, which is used
as a boundary for the number of physical (real) Misc registers in the
system. Pseudo registers (like CP15_UNIMPL) have been moved after the
NUM_PHYS_MISCREGS identifier, so that their enum number is
(NUM_PHYS_MISCREGS < number < NUM_MISCREGS). Moving away those
registers has created some free slots that can be used for future Misc
register implementation.
SERIALIZE and UNSERIALIZE now only save/restore PHYSICAL Misc Registers.
This allows us to define as many pseudo registers as we want without
being concerned about checkpoint compatibility.
Change-Id: I7e297b814eeaa4bee640e81bee625fb66710af45
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/7921
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
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The patch fixes one syntax error in TLB::getResultTe
Change-Id: I31a72a52d5c03f43929a69ca1be61d9c20e76f5b
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/7983
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
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{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>
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do{Long,L1,L2}Descriptor was not able to load descriptors correctly
for big-endian situations, causing recognised Descriptors. Added
big-endian related data conversions to correct them.
Change-Id: I0fdfbbdf56f94bbed19172acae1b6e4a0382b5a0
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/8144
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
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Add an option to automatically set the aarch64 reset vector to the
entry point of the kernel. This is useful when running bare metal
workloads that don't use a normal boot loader.
Change-Id: Id472f865d461f0d8d8ea8efe5db582c170de0b90
Signed-off-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/8143
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
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Changing casting type in src/arch/arm/isa.cc
Change-Id: Ia19b30a1bf8b1b25df149b52613a3533eaced03a
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/8241
Reviewed-by: Brandon Potter <Brandon.Potter@amd.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
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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>
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The old code does secure state check by using "el <= EL2", which
mis-considers secure EL1 and EL0. This patch fixes this by using
inSecureState as in ARM ARM.
Change-Id: I01d847c6af022c1462b16206cbc576f15f5569fd
Reviewed-by: Jack Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/8081
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
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The stats are silently non-copy constructible. Therefore, when someone
copy-constructs any object with stats, asserts happen when registering
the stats, as they were not constructed in the intended way.
This patch solves that by explicitly deleting the copy constructor,
trading an obscure run-time assert for a compile-time somehow more
meaningful error meassage.
This triggers some compilation errors as the FaultStats in the fault
definitions of ARM and SPARC use brace-enclosed initialisations in which
one of the elements derives from DataWrap, which is not
copy-constructible anymore. To fix that, this patch also adds a
constructor for the FaultVals in both ISAs.
Change-Id: I340e203b9386609b32c66e3b8918a015afe415a4
Reviewed-by: Curtis Dunham <curtis.dunham@arm.com>
Reviewed-by: Sascha Bischoff <sascha.bischoff@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/8082
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
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A System object has a _numContexts member variable which represent the
number of ThreadContext registered in the System. Since this has to
match the size of the ThreadContext vector, this patch removes the
manually cached size. This was usually used as a for-loop index, whereas
we want to enforce the use of range-based loops whenever possible.
Change-Id: I1ba317c0393bcc9c1aeebbb1fc22d7b2bc2cf90c
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/8062
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Brandon Potter <Brandon.Potter@amd.com>
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This patch replaces the dummy values which were defined for the
SecureMonitorTrap thus enabling its usage in aarch32 mode. 1) It
changes the vector table offset from 0x14 to 0x4 in compliance with the
armv8 documentation. 2) When trapping in monitor mode for aarch32, the
mon_lr is updated with the pc + a non zero offset (+4/2 depending on the
current instruction set: +4 for A32, +2 for T32).
Change-Id: I01e1e52bf5ecd405e7472e31e01cf9a599153b08
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/8041
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
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The old code chose vector offset associated with exceptions taken
to EL3 by incorrectly using "from64", which is associated with the
exception level where the exception was taken from. However, the
offset should depends on the ISA of the lower EL and not of the
starting EL itself, as specified in ARM ARM. This patch corrects
this by implementing the method in AArch64.TakeException in ARM ARM.
Change-Id: I8f7c9aa777c5f2eef9e2d89c36e9daee23f3a822
Reviewed-by: Jack Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/8001
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
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This patch fixes the Illegal Exception return handler. According to the
armarm documentation, when PSTATE.IL is set to one because of an illegal
exception return, PSTATE.{EL, nRW, SP} are unchanged. This means the
Exception level, Execution state, and stack pointer selection do not
change as a result of the return.
Change-Id: I35f2fe68fb2822a54fc4a21930871eab7a1aaab4
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/8021
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
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Supervisor Trap is supposed to be able to handle exceptions routed
to EL2, which is enabled by HCR_EL2.TGE. This fix adds routeToHyp()
function to Supervisor Trap to handle this, similar to that in
UndefinedFault, DataAbort, etc.
Change-Id: I1fcf9f2d445ecbc13c8f6d3b7d599728b0250ab7
Reviewed-by: Jack Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/7961
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
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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>
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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>
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In AArch32, data cache maintenance instructions that operate by VA do
not generate permission faults.
In AArch64, a data cache invalidate instruction can generate a
permission fault when there are no write permissions to the specified
VA. Data cache clean and data cache clean and invalidate instructions
do not generate permission faults.
Checks for external aborts are also bypassed for data cache
maintenance instructions.
Change-Id: Iea5bc665e4cf66d528e36b671535b66637c4b224
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/7827
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
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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>
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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>
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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>
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A previous change enabled execution of dc ivac from EL0 when
SCTLR_EL1.UCI=1. The Arm ARM specifies that dc ivac is the only data
cache maintenance operation by VA that cannot be executed from
EL0. This changeset essential reverts the change:
8d43922 arch-arm: Allow dc ivac from EL0 when SCTLR_EL1.UCI=1
Change-Id: Ia25fab13846a151f548e649a16067feb1ff65c9c
Reviewed-by: Jack Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/7823
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
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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>
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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>
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Fixed Illegal Exception Return detection, which was not
covering all the documented cases.
Change-Id: If08ddc1490d1c0a1fccee1489d116384770ce0a5
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/7223
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
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This patch implements the ELUsingAArch32K pseudocode, which is returning
true if the provided Exception Level is using A32 ISA, but it is not
panicking (quitting simulation) if the information is unknown (see
documentation).
The panicking is the current behaviour of the ELIs32 utility in gem5.
Change-Id: Iad7b56077d7e0f8ee223b5b9593cb8097f26bb29
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/7222
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
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This patch introduces the inSecureBelow pseudocode function
defined in the armarm documentation. It also replaces the
inSecureState function call which was improperly used in
ELIs32: we might be in secure state (EL3), but with non-secure
lower ELs (SCR.NS = 1).
Change-Id: I01febcb54392ad4e51e785b4d5153aeb3437c778
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-by: Chuan Zhu <chuan.zhu@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/7221
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
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The state of EL1 wasn't determined correctly when running in secure
mode if virtualisation was enabled. This changset updates the
implementation to match the canonical behavior from the ARM ARM.
Change-Id: I7ed6f5c003617773603f678667aac069d73b6f62
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/7141
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
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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>
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Move massive initialization routine to the bottom of miscregs.cc.
Additionally, share register metadata across ISA instances by
making lookUpMiscReg a static member of the ISA and only
initializing it once.
Change-Id: I6d6ab26200c4e781151cc6efd97ce2420e2bf4cc
Signed-off-by: Curtis Dunham <Curtis.Dunham@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Jack Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/6803
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
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Implement proper handling of RES0/RES1 and RAZ/RAO bitfields.
Change-Id: I344c32c3fb1d142acfb0521ba3590ddd2b1f5360
Signed-off-by: Curtis Dunham <Curtis.Dunham@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Jack Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/6802
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
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The mappings for sharing a backing store between AArch32
and AArch64 system registers are made clearer using an
initializer object.
Change-Id: I29dcfab2797b4d36b3182342997edffde334a291
Signed-off-by: Curtis Dunham <Curtis.Dunham@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Jack Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/6801
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
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Implements a high level method for generating a Device Tree node for
an AbstractMemory object.
Change-Id: I544ec642f182f103df26de535fdfaf03b3787a08
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Curtis Dunham <curtis.dunham@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/5964
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
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