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kernel/process_capability: Handle the priority mask and core mask flags

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Handles the priority mask and core mask flags to allow building up the
masks to determine the usable thread priorities and cores for a kernel
process instance.
This commit is contained in:
Lioncash
2018-12-19 19:09:18 -05:00
parent 6ff5135521
commit 27caf71204
2 changed files with 40 additions and 1 deletions
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31
src/core/hle/kernel/process_capability.cpp
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@ -205,7 +205,36 @@ void ProcessCapabilities::Clear() {
}
ResultCode ProcessCapabilities::HandlePriorityCoreNumFlags(u32 flags) {
// TODO: Implement
if (priority_mask != 0 || core_mask != 0) {
return ERR_INVALID_CAPABILITY_DESCRIPTOR;
}
const u32 core_num_min = (flags >> 16) & 0xFF;
const u32 core_num_max = (flags >> 24) & 0xFF;
if (core_num_min > core_num_max) {
return ERR_INVALID_COMBINATION;
}
const u32 priority_min = (flags >> 10) & 0x3F;
const u32 priority_max = (flags >> 4) & 0x3F;
if (priority_min > priority_max) {
return ERR_INVALID_COMBINATION;
}
// The switch only has 4 usable cores.
if (core_num_max >= 4) {
return ERR_INVALID_PROCESSOR_ID;
}
const auto make_mask = [](u64 min, u64 max) {
const u64 range = max - min + 1;
const u64 mask = (1ULL << range) - 1;
return mask << min;
};
core_mask = make_mask(core_num_min, core_num_max);
priority_mask = make_mask(priority_min, priority_max);
return RESULT_SUCCESS;
}