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2014-12-16target-mips: Tighten ISA level checksMaciej W. Rozycki
Tighten ISA level checks down to MIPS II that many of our instructions are missing. Also make sure any 64-bit instruction enables are only applied to 64-bit processors, that is ones that implement at least the MIPS III ISA. Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2014-12-16target-mips: Correct the writes to Status and Cause registers via gdbstubMaciej W. Rozycki
Make writes to CP0.Status and CP0.Cause have the same effect as executing corresponding MTC0 instructions would in Kernel Mode. Also ignore writes in the user emulation mode. Currently for requests from the GDB stub we write all the bits across both registers, ignoring any read-only locations, and do not synchronise the environment to evaluate side effects. We also write these registers in the user emulation mode even though a real kernel presents them as read only. Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2014-12-16target-mips: Make CP0.Config4 and CP0.Config5 registers signedMaciej W. Rozycki
Make the data type used for the CP0.Config4 and CP0.Config5 registers and their mask signed, for consistency with the remaining 32-bit CP0 registers, like CP0.Config0, etc. Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2014-11-07mips: Add macros for CP0.Config3 and CP0.Config4 bitsMaciej W. Rozycki
Define macros for CP0.Config3 and CP0.Config4 bits. These used to be exhaustive as at MIPS32r3, but more bits may have been added since. Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2014-11-03target-mips: remove duplicated mips/ieee mapping functionYongbok Kim
Remove the duplicated ieee_rm in gdbstub.c. Make the other ieee_rm and ieee_ex_to_mips available to other files. Reviewed-by: James Hogan <james.hogan@imgtec.com> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2014-11-03target-mips: add MSA defines and data structureYongbok Kim
add defines and data structure for MIPS SIMD Architecture Reviewed-by: James Hogan <james.hogan@imgtec.com> Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2014-11-03target-mips: CP0_Status.CU0 no longer allows the user to access CP0Leon Alrae
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Yongbok Kim <yongbok.kim@imgtec.com>
2014-11-03target-mips: implement forbidden slotLeon Alrae
When conditional compact branch is encountered decode one more instruction in current translation block - that will be forbidden slot. Instruction in forbidden slot will be executed only if conditional compact branch is not taken. Any control transfer instruction (CTI) which are branches, jumps, ERET, DERET, WAIT and PAUSE will generate RI exception if executed in forbidden or delay slot. Signed-off-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Yongbok Kim <yongbok.kim@imgtec.com>
2014-11-03target-mips: add Config5.SBRILeon Alrae
SDBBP instruction Reserved Instruction control. The purpose of this field is to restrict availability of SDBBP to kernel mode operation. If the bit is set then SDBBP instruction can only be executed in kernel mode. User execution of SDBBP will cause a Reserved Instruction exception. Additionally add missing Config4 and Config5 cases for dm{f,t}c0. Signed-off-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Yongbok Kim <yongbok.kim@imgtec.com>
2014-11-03target-mips: update cpu_save/cpu_load to support new registersLeon Alrae
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Yongbok Kim <yongbok.kim@imgtec.com>
2014-11-03target-mips: add BadInstr and BadInstrP supportLeon Alrae
BadInstr Register (CP0 Register 8, Select 1) The BadInstr register is a read-only register that capture the most recent instruction which caused an exception. BadInstrP Register (CP0 Register 8, Select 2) The BadInstrP register contains the prior branch instruction, when the faulting instruction is in a branch delay slot. Using error_code to indicate whether AdEL or TLBL was triggered during instruction fetch, in this case BadInstr is not updated as valid instruction word is not available. Signed-off-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Yongbok Kim <yongbok.kim@imgtec.com>
2014-11-03target-mips: add TLBINV supportLeon Alrae
For Standard TLB configuration (Config.MT=1): TLBINV invalidates a set of TLB entries based on ASID. The virtual address is ignored in the entry match. TLB entries which have their G bit set to 1 are not modified. TLBINVF causes all entries to be invalidated. Single TLB entry can be marked as invalid on TLB entry write by having EntryHi.EHINV set to 1. Signed-off-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Yongbok Kim <yongbok.kim@imgtec.com>
2014-11-03target-mips: add new Read-Inhibit and Execute-Inhibit exceptionsLeon Alrae
An Execute-Inhibit exception occurs when the virtual address of an instruction fetch matches a TLB entry whose XI bit is set. This exception type can only occur if the XI bit is implemented within the TLB and is enabled, this is denoted by the PageGrain XIE bit. An Read-Inhibit exception occurs when the virtual address of a memory load reference matches a TLB entry whose RI bit is set. This exception type can only occur if the RI bit is implemented within the TLB and is enabled, this is denoted by the PageGrain RIE bit. Signed-off-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Yongbok Kim <yongbok.kim@imgtec.com>
2014-11-03target-mips: update PageGrain and m{t,f}c0 EntryLo{0,1}Leon Alrae
PageGrain needs rw bitmask which differs between MIPS architectures. In pre-R6 if RIXI is supported, PageGrain.XIE and PageGrain.RIE are writeable, whereas in R6 they are read-only 1. On MIPS64 mtc0 instruction left shifts bits 31:30 for MIPS32 backward compatiblity, therefore there are separate mtc0 and dmtc0 helpers. Signed-off-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Yongbok Kim <yongbok.kim@imgtec.com>
2014-11-03target-mips: add RI and XI fields to TLB entryLeon Alrae
In Revision 3 of the architecture, the RI and XI bits were added to the TLB to enable more secure access of memory pages. These bits (along with the Dirty bit) allow the implementation of read-only, write-only, no-execute access policies for mapped pages. Signed-off-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Yongbok Kim <yongbok.kim@imgtec.com>
2014-11-03target-mips: add KScratch registersLeon Alrae
KScratch<n> Registers (CP0 Register 31, Selects 2 to 7) The KScratch registers are read/write registers available for scratch pad storage by kernel mode software. They are 32-bits in width for 32-bit processors and 64-bits for 64-bit processors. CP0Config4.KScrExist[2:7] bits indicate presence of CP0_KScratch1-6 registers. For Release 6, all KScratch registers are required. Signed-off-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Yongbok Kim <yongbok.kim@imgtec.com>
2014-10-14target-mips: fix broken MIPS16 and microMIPSYongbok Kim
Commit 240ce26a broke MIPS16 and microMIPS support as it didn't care those branches and jumps don't have delay slot in MIPS16 and microMIPS. This patch introduces a new argument delayslot_size to the gen_compute_branch() indicating size of delay slot {0, 2, 4}. And the information is used to call handle_delay_slot() forcingly when no delay slot is required. There are some microMIPS branch and jump instructions that requires exact size of instruction in the delay slot. For indicating these instructions, MIPS_HFLAG_BDS_STRICT flag is introduced. Those fictional branch opcodes defined to support MIPS16 and microMIPS are no longer needed. Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com> Tested-by: Jonas Gorski <jogo@openwrt.org> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> [leon.alrae@imgtec.com: cosmetic changes] Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2014-10-13target-mips: Status.UX/SX/KX enable 32-bit address wrappingLeon Alrae
In R6 the special behaviour for data references is also specified for Kernel and Supervisor mode. Therefore MIPS_HFLAG_UX is replaced by generic MIPS_HFLAG_AWRAP indicating enabled 32-bit address wrapping. Signed-off-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
2014-06-18target-mips: implement UserLocal RegisterPetar Jovanovic
From MIPS documentation (Volume III): UserLocal Register (CP0 Register 4, Select 2) Compliance Level: Recommended. The UserLocal register is a read-write register that is not interpreted by the hardware and conditionally readable via the RDHWR instruction. This register only exists if the Config3-ULRI register field is set. Privileged software may write this register with arbitrary information and make it accessible to unprivileged software via register 29 (ULR) of the RDHWR instruction. To do so, bit 29 of the HWREna register must be set to a 1 to enable unprivileged access to the register. Signed-off-by: Petar Jovanovic <petar.jovanovic@imgtec.com> Reviewed-by: Andreas Färber <afaerber@suse.de> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2014-06-05softmmu: move ALIGNED_ONLY to cpu.hPaolo Bonzini
Prepare for moving softmmu_header.h inclusion out of .c files Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-03-27target-mips: Avoid shifting left into sign bitPeter Maydell
Add U suffix to various places where we shift a 1 left by 31, to avoid undefined behaviour. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2014-03-13cpu: Move breakpoints field from CPU_COMMON to CPUStateAndreas Färber
Most targets were using offsetof(CPUFooState, breakpoints) to determine how much of CPUFooState to clear on reset. Use the next field after CPU_COMMON instead, if any, or sizeof(CPUFooState) otherwise. Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-03-13cpu: Turn cpu_handle_mmu_fault() into a CPUClass hookAndreas Färber
Note that while such functions may exist both for *-user and softmmu, only *-user uses the CPUState hook, while softmmu reuses the prototype for calling it directly. Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-03-13cpu: Turn cpu_has_work() into a CPUClass hookAndreas Färber
Default to false. Tidy variable naming and inline cast uses while at it. Tested-by: Jia Liu <proljc@gmail.com> (or32) Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-02-10target-mips: add support for CP0_Config5Petar Jovanovic
Add CP0_Config5, define rw_bitmask and enable modifications. Signed-off-by: Petar Jovanovic <petar.jovanovic@imgtec.com> Reviewed-by: Eric Johnson <eric.johnson@imgtec.com>
2014-02-10target-mips: add support for CP0_Config4Petar Jovanovic
Add CP0_Config4, define rw_bitmask. Signed-off-by: Petar Jovanovic <petar.jovanovic@imgtec.com> Reviewed-by: Eric Johnson <eric.johnson@imgtec.com>
2013-12-02misc: Replace 'struct QEMUTimer' by 'QEMUTimer'Stefan Weil
Most code already used QEMUTimer without the redundant 'struct' keyword. Signed-off-by: Stefan Weil <sw@weilnetz.de> Reviewed-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2013-07-23cpu: Introduce CPUClass::synchronize_from_tb() for cpu_pc_from_tb()Andreas Färber
Where no extra implementation is needed, fall back to CPUClass::set_pc(). Acked-by: Michael Walle <michael@walle.cc> (for lm32) Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-07-09linux-user: Move cpu_clone_regs() and cpu_set_tls() into linux-userPeter Maydell
The functions cpu_clone_regs() and cpu_set_tls() are not purely CPU related -- they are specific to the TLS ABI for a a particular OS. Move them into the linux-user/ tree where they belong. target-lm32 had entirely unused implementations, since it has no linux-user target; just drop them. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Acked-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-06-28cpu: Turn cpu_unassigned_access() into a CPUState hookAndreas Färber
Use it for all targets, but be careful not to pass invalid CPUState. cpu_single_env can be NULL, e.g. on Xen. Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-05-20linux-user: Save the correct resume address for MIPS signal handlingKwok Cheung Yeung
The current ISA mode needs to be saved in bit 0 of the resume address. If the current instruction happens to be in a branch delay slot, then the address of the preceding jump instruction should be stored instead. exception_resume_pc already does both of these tasks, so it is made available and reused. MIPS_HFLAG_BMASK in hflags is cleared, otherwise QEMU may treat the first instruction of the signal handler as a delay slot instruction. Signed-off-by: Kwok Cheung Yeung <kcy@codesourcery.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-03-12cpu: Replace do_interrupt() by CPUClass::do_interrupt methodAndreas Färber
This removes a global per-target function and thus takes us one step closer to compiling multiple targets into one executable. It will also allow to override the interrupt handling for certain CPU families. Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-03-12cpu: Move halted and interrupt_request fields to CPUStateAndreas Färber
Both fields are used in VMState, thus need to be moved together. Explicitly zero them on reset since they were located before breakpoints. Pass PowerPCCPU to kvmppc_handle_halt(). Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-03-05mips-linux-user: Save and restore fpu and dsp from sigcontextRichard Henderson
Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2013-02-16target-mips: Move TCG initialization to MIPSCPU initfnAndreas Färber
Make mips_tcg_init() non-static and add tcg_enabled() check to suppress it for qtest. Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-01-08target-mips: Allow DSP access to be disabled once enabled.Eric Johnson
Clear the DSP hflags at the start of compute_hflags. Otherwise access is not properly disabled once enabled. Signed-off-by: Eric Johnson <ericj@mips.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-12-19fpu: move public header file to include/fpuPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19exec: move include files to include/exec/Paolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-11-01Merge remote-tracking branch 'afaerber/qom-cpu' into stagingAnthony Liguori
* afaerber/qom-cpu: (35 commits) target-i386: Pass X86CPU to kvm_handle_halt() target-i386: Pass X86CPU to kvm_get_mp_state() cpu: Move thread_id to CPUState cpus: Pass CPUState to run_on_cpu() target-i386: Pass X86CPU to cpu_x86_inject_mce() target-i386: Pass X86CPU to kvm_mce_inject() cpus: Pass CPUState to [qemu_]cpu_has_work() spapr: Pass PowerPCCPU to hypercalls spapr: Pass PowerPCCPU to spapr_hypercall() target-ppc: Pass PowerPCCPU to cpu_ppc_hypercall target-ppc: Pass PowerPCCPU to powerpc_excp() xtensa_pic: Pass XtensaCPU to xtensa_ccompare_cb() cpus: Pass CPUState to qemu_wait_io_event_common() cpus: Pass CPUState to flush_queued_work() cpu: Move queued_work_{first,last} to CPUState cpus: Pass CPUState to qemu_cpu_kick() target-ppc: Rename kvm_kick_{env => cpu} and pass PowerPCCPU ppc: Pass PowerPCCPU to {ppc6xx,ppc970,power7,ppc40x,ppce500}_set_irq() cpus: Pass CPUState to qemu_tcg_init_vcpu() cpus: Pass CPUState to qemu_tcg_cpu_thread_fn ... Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-10-31target-mips: Add ASE DSP resources access checkJia Liu
Add MIPS ASE DSP resources access check. Signed-off-by: Jia Liu <proljc@gmail.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-10-31cpus: Pass CPUState to [qemu_]cpu_has_work()Andreas Färber
For target-mips also change the return type to bool. Make include paths for cpu-qom.h consistent for alpha and unicore32. Signed-off-by: Andreas Färber <afaerber@suse.de> [AF: Updated new target-openrisc function accordingly] Acked-by: Richard Henderson <rth@twiddle.net> (for alpha)
2012-10-23Rename target_phys_addr_t to hwaddrAvi Kivity
target_phys_addr_t is unwieldly, violates the C standard (_t suffixes are reserved) and its purpose doesn't match the name (most target_phys_addr_t addresses are not target specific). Replace it with a finger-friendly, standards conformant hwaddr. Outstanding patchsets can be fixed up with the command git rebase -i --exec 'find -name "*.[ch]" | xargs s/target_phys_addr_t/hwaddr/g' origin Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-09-15target-mips: switch to AREG0 free modeBlue Swirl
Add an explicit CPUState parameter instead of relying on AREG0 and switch to AREG0 free mode. Signed-off-by: Blue Swirl <blauwirbel@gmail.com> Acked-by: Aurelien Jarno <aurelien@aurel32.net>
2012-09-08MIPS/user: Fix reset CPU state initializationMaciej W. Rozycki
This change updates the CPU reset sequence to use a common piece of code that figures out CPU state flags, fixing the problem with MIPS_HFLAG_COP1X not being set where applicable that causes floating-point MADD family instructions (and other instructions from the MIPS IV FP subset) to trap. As compute_hflags is now shared between op_helper.c and translate.c, the function is now moved to a common header. There are no changes to this function. The problem was seen with the 24Kf MIPS32r2 processor in user emulation. The new approach prevents system and user emulation from diverging -- all the hflags state is initialized in one place now. Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2012-06-04Kill off cpu_state_reset()Andreas Färber
In commit 1bba0dc932e8826a7d030df3767daf0bc339f9a2 cpu_reset() was renamed to cpu_state_reset(), to allow introducing a new cpu_reset() that would operate on QOM objects. All callers have been updated except for one in target-mips, so drop all implementations except for the one in target-mips and move the declaration there until MIPSCPU reset can be fully QOM'ified. Signed-off-by: Andreas Färber <afaerber@suse.de> Acked-by: Michael Walle <michael@walle.cc> (for lm32) Acked-by: Max Filippov <jcmvbkbc@gmail.com> (for xtensa) Acked-by: Edgar E. Iglesias <edgar.iglesias@gmail.com> (for mb + cris) Acked-by: Alexander Graf <agraf@suse.de> (for ppc) Acked-by: Blue Swirl <blauwirbel@gmail.com>
2012-06-04target-mips: Let cpu_mips_init() return MIPSCPUAndreas Färber
Turn cpu_init macro into a static inline function returning CPUMIPSState for backwards compatibility. Signed-off-by: Andreas Färber <afaerber@suse.de>
2012-05-12target-mips: Remove commented-out function declarationAndreas Färber
There is no function cpu_mips_get_clock(), so drop it. Signed-off-by: Andreas Färber <afaerber@suse.de> Acked-by: Stefan Weil <sw@weilnetz.de>
2012-05-01Merge branch 'qom-cpu-rest.v1' of git://github.com/afaerber/qemu-cpuBlue Swirl
* 'qom-cpu-rest.v1' of git://github.com/afaerber/qemu-cpu: Makefile: Simplify compilation of target-*/cpu.c target-mips: Start QOM'ifying CPU init target-mips: QOM'ify CPU target-m68k: Add QOM CPU subclasses target-m68k: Start QOM'ifying CPU init target-m68k: QOM'ify CPU reset target-m68k: QOM'ify CPU target-sh4: Start QOM'ifying CPU init target-sh4: QOM'ify CPU reset target-sh4: QOM'ify CPU MAINTAINERS: Downgrade target-mips and target-sh4 to Odd Fixes MAINTAINERS: Downgrade target-m68k to Odd Fixes
2012-04-30target-mips: QOM'ify CPUAndreas Färber
Embed CPUMIPSState as first member of QOM MIPSCPU. Let CPUClass::reset() call cpu_state_reset() for now. Signed-off-by: Andreas Färber <afaerber@suse.de> Reviewed-by: Richard Henderson <rth@twiddle.net>
2012-04-28target-mips: Move definition of uint_fast{8, 16}_t to osdep.hAndreas Färber
osdep.h is included via qemu-common.h. Prepares for use of [u]int_fast*_t types in softfloat code. Signed-off-by: Andreas Färber <afaerber@suse.de> Cc: Ben Taylor <bentaylor.solx86@gmail.com> Cc: Aurélien Jarno <aurelien@aurel32.net> Cc: Peter Maydell <peter.maydell@linaro.org> Tested-by: Bernhard Walle <bernhard@bwalle.de> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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