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Convert the cp15 crn=7 registers to the new scheme.
Note that to do this we have to distinguish some registers
used on the ARM9 and ARM10 from some which are ARM1176
only. This is because the old code returned a value of 0
but always set the Z flag (by clearing env->ZF, since we
store the Z flag in CPUState inverted). This is inconsistent
with actual ARM CPU behaviour, which only sets flags for
reads to r15 and sets them based on the top bits of the result.
However it happened to work for the two common use cases for
cp15 crn=7 reads:
* On ARM9 and ARM10 the cache clean-and-test operations are
typically done with a destination of r15 so that you can do
a "loop: mrc ... ; bne loop" to keep cleaning until the cache
is finally clean; always setting the Z flag means this loop
terminates immediately
* on ARM1176 the Cache Dirty Status Register reads as zero
if the cache is dirty; returning 0 means this is correctly
implemented for QEMU
Since the new coprocessor register framework does the right
thing of always setting flags based on the returned result
for reads to r15, we need to split these up so that we can
return (1<<30) for the ARM9/ARM10 registers but 0 for the
ARM1176 one.
This allows us to remove the nasty hack which always sets Z.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Convert the cp15 crn=15 (implementation specific) registers
to the new scheme.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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All the users of cpu_arm_set_cp_io have been converted, so we
can remove it and the infrastructure it used.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Initial infrastructure for data-driven registration of
coprocessor register implementations.
We still fall back to the old-style switch statements pending
complete conversion of all existing registers.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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The macro definition of cpu_init meant that if cpu_arm_init()
returned NULL this wouldn't result in cpu_init() itself returning
NULL. This had the effect that "-cpu foo" for some unknown CPU
name 'foo' would cause ARM targets to segfault rather than
generating a useful error message. Fix this by making cpu_init
a simple inline function.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Andreas Färber <afaerber@suse.de>
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Make cpu_arm_init() return a QOM ARMCPU, so that we don't need to
obtain an ARMCPU through arm_env_get_cpu() in machine init code.
This requires to adjust the inclusion site of cpu-qom.h and in turn,
forward-looking, to homogenize its include order.
cpu_init() must still return a CPUARMState for backwards and
cross-target compatibility, so adjust the cpu_init macro.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Move the setting of the feature bits from cpu_reset_model_id()
to each CPU's instance init function. This requires us to move
the features field in CPUARMState so that it is not cleared
on reset.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Andreas Färber <afaerber@suse.de>
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Signed-off-by: Benoit Canet <benoit.canet@gmail.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Add support for ARM BE8 userspace binaries.
i.e. big-endian data and little-endian code.
In principle LE8 mode is also possible, but AFAIK has never actually
been implemented/used.
System emulation doesn't have any useable big-endian board models,
but should in principle work once you fix that.
Dynamic endianness switching requires messing with data accesses,
preferably with TCG cooperation, and is orthogonal to BE8 support.
Signed-off-by: Paul Brook <paul@codesourcery.com>
[PMM: various changes, mostly as per my suggestions in code review:
* rebase
* use EF_ defines rather than hardcoded constants
* make bswap_code a bool for future VMSTATE macro compatibility
* update comment in cpu.h about TB flags bit field usage
* factor out load-code-and-swap into arm_ld*_code functions and
get_user_code* macros
* fix stray trailing space at end of line
* added braces in disas.c to satisfy checkpatch
]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
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This patch replaces the ARM_FEATURE_VFP3 test when reading MVFR registers
with a test for a new feature flag ARM_FEATURE_MVFR, and sets this feature
for all ARMv6K cores (ARM1156 is not a v6K core, yet supports MVFR; qemu
does not support ARM1156 at this time.)
MVFR0 and MVFR1 were introduced in ARM1136JF-S r1p0 (ARMv6K, VFPv2) and are
present in ARM1156T2F-S (non-v6K), ARM1176JZF-S, ARM11MPCore and newer cores.
Reference: ARM DDI 0211H, 0290G, 0301H, 0360E.
http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0211h/Ffbefjag.html
Without this change, the linux kernel will not boot with VFP support enabled
under ARM1176 system emulation, due to the unconditional use of MVFR1 at the
end of vfp_init() in arch/arm/vfp/vfpmodule.c:
VFP support v0.3: implemetor 41 architecture 1 part 20 variant b rev 5
Internal error: Oops - undefined instruction: 0 [#1]
Signed-off-by: Andrew Towers <atowers@gmail.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Introduce only one non-abstract type TYPE_ARM_CPU and do not touch
cp15 registers to not interfere with Peter's ongoing remodelling.
Embed CPUARMState as first (additional) field of ARMCPU.
Let CPUClass::reset() call cpu_state_reset() for now.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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It's unused, so no need to QOM'ify it later.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Scripted conversion:
for file in *.[hc] hw/*.[hc] hw/kvm/*.[hc] linux-user/*.[hc] linux-user/m68k/*.[hc] bsd-user/*.[hc] darwin-user/*.[hc] tcg/*/*.[hc] target-*/cpu.h; do
sed -i "s/CPUState/CPUArchState/g" $file
done
All occurrences of CPUArchState are expected to be replaced by QOM CPUState,
once all targets are QOM'ified and common fields have been extracted.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
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Scripted conversion:
sed -i "s/CPUState/CPUARMState/g" target-arm/*.[hc]
sed -i "s/#define CPUARMState/#define CPUState/" target-arm/cpu.h
Signed-off-by: Andreas Färber <afaerber@suse.de>
Acked-by: Anthony Liguori <aliguori@us.ibm.com>
Acked-by: Peter Maydell <peter.maydell@linaro.org>
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Add a definition of a Cortex-A15 CPU. Note that for the moment we do
not implement any of:
* Large Physical Address Extensions (LPAE)
* Virtualization Extensions
* Generic Timer
* TrustZone (this is also true of our existing Cortex-A9 model, etc)
This CPU model is sufficient to boot a Linux kernel which has been
compiled for an A15 without LPAE enabled.
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Add a dummy implementation of the cp15 registers for the generic
timer (found in the Cortex-A15), just sufficient for Linux to
decide that it can't use it. This requires at least CNTP_CTL and
CNTFRQ to be implemented as RAZ/WI; we RAZ/WI all of c14.
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Mark Langsdorf <mark.langsdorf@calxeda.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Add dummy register support for the cp15, CRn=c15 registers.
config_base_register and power_control_register currently
default to 0, but may have improved support after the QOM
CPU patches are finished.
Signed-off-by: Mark Langsdorf <mark.langsdorf@calxeda.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Implement the fused multiply-accumulate instructions (VFMA, VFMS,
VFNMA, VFNMS) which are new in VFPv4.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Add support for UDIV and SDIV in ARM mode. This is a new optional
feature for A profile cores (Thumb mode has had UDIV and SDIV for
M profile cores for some time).
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Rename the ARM_FEATURE_DIV feature bit to _THUMB_DIV, to
make room for a new feature switch enabling DIV in the ARM
encoding. (Cores may implement either (a) no divide insns
(b) divide insns in Thumb encodings only (c) divide insns
in both ARM and Thumb encodings.)
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Parameter is_softmmu (and its evil mutant twin brother is_softmuu)
is not used in cpu_*_handle_mmu_fault() functions, remove them
and adjust callers.
Acked-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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The 1136r1 is actually a v6K core (unlike the 1136r0); mark it as such,
thus enabling the TLS registers, NOP hints, CLREX, half and byte wide
exclusive load/stores, etc.
The VA-to-PA translation registers are not present on 1136r1, so
introduce a new feature flag for them, which is enabled on 1176,
11MPCore and all v7 cores.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Jamie Iles <jamie@jamieiles.com>
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Add support for v6K ARM1176JZF-S. This core includes the VA<->PA
translation capability and security extensions.
Signed-off-by: Jamie Iles <jamie@jamieiles.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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* 'for-upstream' of git://git.linaro.org/people/pmaydell/qemu-arm:
target-arm: Fix BASEPRI, BASEPRI_MAX, and FAULTMASK access
target-arm: Minimal implementation of performance counters
Revert "Makefile.target: Allow target helpers to be in any *_helper.c file"
Revert "target-arm: Use global env in neon_helper.c helpers"
target-arm: Pass fp status pointer explicitly to neon fp helpers
target-arm: Make VFP binop helpers take pointer to fpstatus, not CPUState
target-arm: Add helper function to generate code to get fpstatus pointer
Revert "target-arm: Use global env in iwmmxt_helper.c helpers"
Conflicts:
Makefile.target
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Parameter 'info' is const, so add the missing attribute.
v2:
Add 'const' to the local variable info in do_cpu_reset() and to
the boot_info field in CPUARMState (suggested by Peter Maydell).
Cc: Andrzej Zaborowski <balrogg@gmail.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Andrzej Zaborowski <andrew.zaborowski@intel.com>
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Move functions cpu_has_work() and cpu_pc_from_tb() from exec.h to cpu.h. This is
needed by later patches.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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Newer Linux kernels assume the existence of the performance counter
cp15 registers. Provide a minimal implementation of these registers.
We support no events. This should be compliant with the ARM ARM,
except that we don't implement the cycle counter.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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This interrupt name was only used by the ARM port.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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Basic implementation of DEC/Intel SA-1100/SA-1110 chips emulation.
Implemented:
- IRQs
- GPIO
- PPC
- RTC
- UARTs (no IrDA/etc.)
- OST reused from pxa25x
Everything else is TODO (esp. PM/idle/sleep!) - see the todo in the
hw/strongarm.c
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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Currently target-arm/ assumes at least ARMv5 core. Add support for
handling also ARMv4/ARMv4T. This changes the following instructions:
BX(v4T and later)
BKPT, BLX, CDP2, CLZ, LDC2, LDRD, MCRR, MCRR2, MRRC, MCRR, MRC2, MRRC,
MRRC2, PLD QADD, QDADD, QDSUB, QSUB, STRD, SMLAxy, SMLALxy, SMLAWxy,
SMULxy, SMULWxy, STC2 (v5 and later)
All instructions that are "v5TE and later" are also bound to just v5, as
that's how it was before.
This patch doesn _not_ include disabling of cp15 access and base-updated
data abort model (that will be required to emulate chips based on a
ARM7TDMI), because:
* no ARM7TDMI chips are currently emulated (or planned)
* those features aren't strictly necessary for my purposes (SA-1 core
emulation).
All v5 models are handled as they are v5T. Internally we still have a
check if the model is a v5(T) or v5TE, but as all emulated cores are
v5TE, those two cases are simply aliased (for now).
Patch is heavily based on patch by Filip Navara <filip.navara@gmail.com>
which in turn is based on work by Ulrich Hecht <uli@suse.de> and Vincent
Sanders <vince@kyllikki.org>.
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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Implement VA->PA translations by cp15-c7 that went through unchanged
previously.
Signed-off-by: Adam Lackorzynski <adam@os.inf.tu-dresden.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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These two fields were added as a part of ARMv7 support patch (back in
2007), were never used by any code, so can be dropped.
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Andrzej Zaborowski <andrew.zaborowski@intel.com>
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Add a CPU feature flag for v7MP (the multiprocessing extensions); some
instructions exist only for v7MP and not for the base v7 architecture.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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M profile ARM cores don't have a CPSR mode field. Set the bit in the
TB flags that indicates non-user mode correctly for these cores.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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Add symbolic constants for the bitfields we use in the TB flags.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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Add support to the ARM helper routines for a second fp_status value
which should be used for operations which the ARM ARM indicates use
"ARM standard floating-point arithmetic" rather than being controlled
by the rounding/flush/NaN settings in the FPSCR.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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Expose the vfp_get_fpscr() and vfp_set_fpscr() functions to C
code as well as generated code, so we can use them to read and
write the FPSCR when saving and restoring VFP registers across
signal handlers in linux-user mode.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@nokia.com>
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Signed-off-by: Riku Voipio <riku.voipio@nokia.com>
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fprintf_function uses format checking with GCC_FMT_ATTR.
Format errors were fixed in
* target-i386/helper.c
* target-mips/translate.c
* target-ppc/translate.c
Cc: Blue Swirl <blauwirbel@gmail.com>
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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This prevent coprocessor IO structure from being reset on cpu reset. This was
a problem for PXA which uses coprocessor 6 and 14.
Signed-off-by: Lars Munch <lars@segv.dk>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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Move ARMv7-M PC/SP initialization to the CPU reset routine. Add a board
reset routine to call this. Also load values directly from ROM as
images have not been copied yet.
Avoid clearing the NVIC pointer on cpu reset.
Signed-off-by: Paul Brook <paul@codesourcery.com>
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Removes a set of ifdefs from exec.c.
Introduce TARGET_VIRT_ADDR_SPACE_BITS for all targets other
than Alpha. This will be used for page_find_alloc, which is
supposed to be using virtual addresses in the first place.
Signed-off-by: Richard Henderson <rth@twiddle.net>
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Implement ARMv6 atomic ops (ldrex/strex) using the same trick as PPC.
Signed-off-by: Paul Brook <paul@codesourcery.com>
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Basic Cortex-A9 support.
Signed-off-by: Paul Brook <paul@codesourcery.com>
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Implement the ARM VFP half precision floating point extensions.
Signed-off-by: Paul Brook <paul@codesourcery.com>
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handle_cpu_signal is very nearly copy-paste code for each target, with a
few minor variations. This patch sets up appropriate defaults for a
generic handle_cpu_signal and provides overrides for particular targets
that did things differently. Fixing things like the persistent (XXX:
use sigsetjmp) should now become somewhat easier.
Previous comments on this patch suggest that the "activate soft MMU for
this block" comments refer to defunct functionality. I have removed
such blocks for the appropriate targets in this patch.
Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
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