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

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

View file

@ -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;
}

View file

@ -122,6 +122,16 @@ public:
///
void InitializeForMetadatalessProcess();
/// Gets the allowable core mask
u64 GetCoreMask() const {
return core_mask;
}
/// Gets the allowable priority mask
u64 GetPriorityMask() const {
return priority_mask;
}
private:
/// Attempts to parse a given sequence of capability descriptors.
///