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3264430170
Fix a long-standing bug in the PowerPC OFW call function on SMP machines by forcing all secondary CPUs into a busy wait with interrupts off during the call. This bug caused ofwdump -a to hang the system. Following section 8.4 of the Open Firmware PowerPC processor binding, the firmware is free to overwrite the system interrupt handlers during OF calls, restoring the OS handlers on exit. On single CPU systems, this process is invisible to the operating system. On multiple CPU systems, taking any exception on a secondary CPU while an OF call is in progress ends with that exception vectored into OF, resulting in a slow movement of the entire system into firmware context and a machine hang. |
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| .. | ||
| clock.c | ||
| copyinout.c | ||
| interrupt.c | ||
| locore.S | ||
| machdep.c | ||
| mmu_oea.c | ||
| mmu_oea64.c | ||
| mp_cpudep.c | ||
| nexus.c | ||
| ofw_machdep.c | ||
| ofwmagic.S | ||
| platform_chrp.c | ||
| swtch.S | ||
| trap.c | ||
| trap_subr.S | ||
| uma_machdep.c | ||
| vm_machdep.c | ||