89c659d80b
reference: https://github.com/raspberrypi/firmware/issues/542 procsave(Proc* p) { uvlong t; cycles(&t); p->pcycles += t; // TODO: save and restore VFPv3 FP state once 5[cal] know the new registers. fpuprocsave(p); /* * Prevent the following scenario: * pX sleeps on cpuA, leaving its page tables in mmul1 * pX wakes up on cpuB, and exits, freeing its page tables * pY on cpuB allocates a freed page table page and overwrites with data * cpuA takes an interrupt, and is now running with bad page tables * In theory this shouldn't hurt because only user address space tables * are affected, and mmuswitch will clear mmul1 before a user process is * dispatched. But empirically it correlates with weird problems, eg * resetting of the core clock at 0x4000001C which confuses local timers. */ if(conf.nmach > 1) mmuswitch(nil); } |
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386 | ||
68000 | ||
68020 | ||
acme | ||
adm/timezone | ||
amd64 | ||
arm | ||
lib | ||
mips | ||
power | ||
power64 | ||
rc | ||
sparc | ||
sparc64 | ||
spim | ||
sys | ||
.hgignore |