kernel/cpu: add cpu_frequency()

implement on x86 with APERFMPERF. Change-Id: Ia484854c76dee76c5447983de15800a25d791d39 Reviewed-on: https://review.haiku-os.org/c/haiku/+/3213 Reviewed-by: Jérôme Duval <[email protected]>
2020-09-15 20:42:14 +00:00
parent 026c8b9c04
commit 22fdfc4428
10 changed files with 94 additions and 0 deletions
@@ -19,6 +19,8 @@ extern "C" {

 status_t arch_system_info_init(struct kernel_args *args);
 void arch_fill_topology_node(cpu_topology_node_info* node, int32 cpu);
+status_t arch_get_frequency(uint64 *frequency, int32 cpu);
+

 #ifdef __cplusplus
 }
@@ -102,6 +102,7 @@ status_t cpu_init_percpu(struct kernel_args *ka, int curr_cpu);
 status_t cpu_init_post_vm(struct kernel_args *args);
 status_t cpu_init_post_modules(struct kernel_args *args);
 bigtime_t cpu_get_active_time(int32 cpu);
+uint64 cpu_frequency(int32 cpu);

 cpu_ent *get_cpu_struct(void);
 extern inline cpu_ent *get_cpu_struct(void) { return &gCPU[smp_get_current_cpu()]; }