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Make sure a POR doesn't clobber the value of the hpstate.

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--HG--
extra : convert_revision : 4504f08fd94792819bd4419bbd2e0ebd1d7f29e9
This commit is contained in:
Gabe Black 2006-11-14 01:29:11 -05:00
parent 6b95f24145
commit c2ceaa887e
1 changed files with 10 additions and 1 deletions
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11
src/arch/sparc/faults.cc
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@ -593,7 +593,16 @@ void PowerOnReset::invoke(ThreadContext * tc)
tc->setMiscReg(MISCREG_PSTATE, 1 << 4);
//Turn on red and hpriv, set everything else to 0
tc->setMiscReg(MISCREG_HPSTATE, (1 << 5) | (1 << 2));
MiscReg HPSTATE = tc->readMiscReg(MISCREG_HPSTATE);
//HPSTATE.red = 1
HPSTATE |= (1 << 5);
//HPSTATE.hpriv = 1
HPSTATE |= (1 << 2);
//HPSTATE.ibe = 0
HPSTATE &= ~(1 << 10);
//HPSTATE.tlz = 0
HPSTATE &= ~(1 << 0);
tc->setMiscReg(MISCREG_HPSTATE, HPSTATE);
//The tick register is unreadable by nonprivileged software
tc->setMiscReg(MISCREG_TICK, 1ULL << 63);