diff options
Diffstat (limited to 'src/arch/arm')
| -rw-r--r-- | src/arch/arm/isa.cc | 9 | ||||
| -rw-r--r-- | src/arch/arm/miscregs.hh | 2 | ||||
| -rw-r--r-- | src/arch/arm/utility.cc | 13 |
3 files changed, 23 insertions, 1 deletions
diff --git a/src/arch/arm/isa.cc b/src/arch/arm/isa.cc index 216ae04e7..9988d431a 100644 --- a/src/arch/arm/isa.cc +++ b/src/arch/arm/isa.cc @@ -447,6 +447,7 @@ ISA::setMiscReg(int misc_reg, const MiscReg &val, ThreadContext *tc) default: panic("Security Extensions not implemented!"); } + warn("Translating via MISCREG in atomic mode! Fix Me!\n"); req->setVirt(0, val, 1, flags, tc->pcState().pc()); fault = tc->getDTBPtr()->translateAtomic(req, tc, mode); if (fault == NoFault) { @@ -475,7 +476,13 @@ ISA::setMiscReg(int misc_reg, const MiscReg &val, ThreadContext *tc) tc->getITBPtr()->invalidateMiscReg(); tc->getDTBPtr()->invalidateMiscReg(); break; - + case MISCREG_CPSR_MODE: + // This miscreg is used by copy*Regs to set the CPSR mode + // without updating other CPSR variables. It's used to + // make sure the register map is in such a state that we can + // see all of the registers for the copy. + updateRegMap(val); + return; } } setMiscRegNoEffect(misc_reg, newVal); diff --git a/src/arch/arm/miscregs.hh b/src/arch/arm/miscregs.hh index fc18fa114..2ccd9b4c2 100644 --- a/src/arch/arm/miscregs.hh +++ b/src/arch/arm/miscregs.hh @@ -170,6 +170,7 @@ namespace ArmISA MISCREG_ID_ISAR3, MISCREG_ID_ISAR4, MISCREG_ID_ISAR5, + MISCREG_CPSR_MODE, MISCREG_CP15_UNIMP_START, MISCREG_TCMTR = MISCREG_CP15_UNIMP_START, MISCREG_ID_PFR1, @@ -233,6 +234,7 @@ namespace ArmISA "pmceid1", "pmc_other", "pmxevcntr", "pmuserenr", "pmintenset", "pmintenclr", "id_isar0", "id_isar1", "id_isar2", "id_isar3", "id_isar4", "id_isar5", + "cpsr_mode", // Unimplemented below "tcmtr", "id_pfr1", "id_dfr0", "id_afr0", diff --git a/src/arch/arm/utility.cc b/src/arch/arm/utility.cc index 0d91c9f90..6bca63291 100644 --- a/src/arch/arm/utility.cc +++ b/src/arch/arm/utility.cc @@ -124,8 +124,21 @@ void copyRegs(ThreadContext *src, ThreadContext *dest) { int i; + + int saved_mode = ((CPSR)src->readMiscReg(MISCREG_CPSR)).mode; + + // Make sure we're in user mode, so we can easily see all the registers + // in the copy loop + src->setMiscReg(MISCREG_CPSR_MODE, MODE_USER); + dest->setMiscReg(MISCREG_CPSR_MODE, MODE_USER); + for(i = 0; i < TheISA::NumIntRegs; i++) dest->setIntReg(i, src->readIntReg(i)); + + // Restore us back to the old mode + src->setMiscReg(MISCREG_CPSR_MODE, saved_mode); + dest->setMiscReg(MISCREG_CPSR_MODE, saved_mode); + for(i = 0; i < TheISA::NumFloatRegs; i++) dest->setFloatReg(i, src->readFloatReg(i)); for(i = 0; i < TheISA::NumMiscRegs; i++) |