diff options
Diffstat (limited to 'src/include/kernel/cpu.H')
-rw-r--r-- | src/include/kernel/cpu.H | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/src/include/kernel/cpu.H b/src/include/kernel/cpu.H index 4d5134114..0fb794989 100644 --- a/src/include/kernel/cpu.H +++ b/src/include/kernel/cpu.H @@ -1,3 +1,8 @@ +/** @file cpu.H + * @brief Defines kernel information and functions about CPUs. + * + * In this kernel the term CPU refers to a hardware thread (SMT), not core. + */ #ifndef __KERNEL_CPU_H #define __KERNEL_CPU_H @@ -10,17 +15,31 @@ class Scheduler; +/** @struct cpu_t + * @brief Stores per-CPU kernel information. + */ struct cpu_t { + /** Stack to use while in kernel mode. */ void* kernel_stack; + /** ID of the CPU (PIR value) */ cpuid_t cpu; - + + /** Pointer to the scheduler for this CPU (may not be unique) */ Scheduler* scheduler; + /** Location for scheduler to store per-CPU data, currently used + * for the local run-queue for processor affinity. + */ + void* scheduler_extra; + /** Pointer to the idle task for this CPU */ task_t* idle_task; }; +/** @fn getCpuId + * @brief Read the PIR value to determine the cpuid_t of this CPU. + */ ALWAYS_INLINE -inline uint64_t getCpuId() +inline cpuid_t getCpuId() { return getPIR() & (KERNEL_MAX_SUPPORTED_CPUS - 1); } |