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powerpc64/xics: Fix comment typo

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This commit is contained in:
Justin Hibbits 2018-10-21 02:25:56 +00:00
parent 2756851a77
commit 54b310b892
1 changed files with 1 additions and 1 deletions
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sys/powerpc/pseries/xics.c
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@ -143,7 +143,7 @@ static driver_t xics_driver = {
/* We can only pass physical addresses into OPAL. Kernel stacks are in the KVA, /* We can only pass physical addresses into OPAL. Kernel stacks are in the KVA,
* not in the direct map, so we need to somehow extract the physical address. * not in the direct map, so we need to somehow extract the physical address.
* However, pmap_kextract() takes locks, which is forbidden in a critical region * However, pmap_kextract() takes locks, which is forbidden in a critical region
* (which PMAP_DISPATCH() operates in). The kernel is mapped into the Direct * (which PIC_DISPATCH() operates in). The kernel is mapped into the Direct
* Map (0xc000....), and the CPU implicitly drops the top two bits when doing * Map (0xc000....), and the CPU implicitly drops the top two bits when doing
* real address by nature that the bus width is smaller than 64-bits. Placing * real address by nature that the bus width is smaller than 64-bits. Placing
* cpu_xirr into the DMAP lets us take advantage of this and avoids the * cpu_xirr into the DMAP lets us take advantage of this and avoids the