kernel: implement cpu IDs and per-cpu variables

include/socks/cpu.h

@@ -1,13 +1,33 @@
 #ifndef SOCKS_CPU_H_
 #define SOCKS_CPU_H_
 
-#include <socks/bitmap.h>
+#include <socks/machine/cpu.h>
+#include <socks/sched.h>
+
+typedef enum cpu_flags {
+	CPU_ONLINE = 0x01u,
+} cpu_flags_t;
+
+typedef struct cpu_data {
+	cpu_flags_t c_flags;
+	unsigned int c_id;
+
+	task_t *c_current_task;
+	runqueue_t c_rq;
+} cpu_data_t;
 
 /* maximum number of processor cores that the kernel can support.
    TODO move to build config option */
 #define CPU_MAX 128
 
-DECLARE_BITMAP(cpu_available, CPU_MAX);
-DECLARE_BITMAP(cpu_online, CPU_MAX);
+#define this_cpu() (ml_cpu_block_get_id(ml_this_cpu()))
+
+extern cpu_data_t *get_this_cpu(void);
+extern void put_cpu(cpu_data_t *cpu);
+
+extern void cpu_set_available(unsigned int cpu_id);
+extern void cpu_set_online(unsigned int cpu_id);
+
+extern unsigned int cpu_get_highest_available(void);
 
 #endif

include/socks/percpu.h

@@ -1,6 +1,7 @@
 #ifndef SOCKS_PERCPU_H_
 #define SOCKS_PERCPU_H_
 
+#include <socks/status.h>
 #include <socks/compiler.h>
 
 #define DEFINE_PERCPU_VAR(type, name) \
@@ -10,6 +11,7 @@
 
 #define percpu_put(var)
 
+extern kern_status_t init_per_cpu_areas(void);
 extern void *__percpu_get(void *var);
 
 #endif

include/socks/sched.h

@@ -47,7 +47,7 @@ typedef struct task {
 typedef struct thread {
 	thread_state_t tr_state;
 	task_t *tr_parent;
-	
+
 	unsigned int tr_id;
 	unsigned int tr_prio;
 
@@ -64,10 +64,13 @@ typedef struct runqueue {
 
 extern kern_status_t sched_init(void);
 
+extern void runqueue_init(runqueue_t *rq);
+
 extern task_t *task_alloc(void);
 static inline task_t *task_ref(task_t *task) { return object_data(object_ref(object_header(task))); }
 static inline void task_deref(task_t *task) { object_deref(object_header(task)); }
 extern task_t *task_from_pid(unsigned int pid);
+extern task_t *kernel_task(void);
 
 static inline void task_lock_irqsave(task_t *task, unsigned long *flags)
 {