BXE: min->MIN, plus an spatch
[akaros.git] / kern / include / smp.h
index d8c1fb0..b7e0797 100644 (file)
 /* SMP related functions */
 
 #include <arch/smp.h>
-#include <arch/types.h>
+#include <ros/common.h>
+#include <sys/queue.h>
 #include <trap.h>
 #include <atomic.h>
-#include <workqueue.h>
+#include <process.h>
+#include <syscall.h>
+#include <alarm.h>
+#include <trace.h>
+#ifdef CONFIG_X86_64
+#include <arch/vm.h>
+#endif
 
-// will want this padded out to cacheline alignment
-struct per_cpu_info {
-       uint32_t lock;
-       struct workqueue workqueue;
+#ifdef __SHARC__
+typedef sharC_env_t;
+#endif
+
+#define CPU_STATE_IRQ                  0
+#define CPU_STATE_KERNEL               1
+#define CPU_STATE_USER                 2
+#define CPU_STATE_IDLE                 3
+#define NR_CPU_STATES                  4
+
+static char *cpu_state_names[NR_CPU_STATES] =
+{
+       "irq",
+       "kern",
+       "user",
+       "idle",
 };
-extern struct per_cpu_info  per_cpu_info[MAX_NUM_CPUS];
-extern volatile uint8_t num_cpus;
+
+struct per_cpu_info {
+#ifdef CONFIG_X86_64
+       uintptr_t stacktop;                     /* must be first */
+       int coreid;                                     /* must be second */
+       /* virtual machines */
+       /* this is all kind of gross, but so it goes. Kmalloc
+        * the vmxarea. It varies in size depending on the architecture.
+        */
+       struct vmcs *vmxarea;
+       struct vmcs *vmcs;
+       pseudodesc_t host_gdt;
+       int vmx_enabled;
+       void *local_vcpu;
+#endif
+       spinlock_t lock;
+       /* Process management */
+       // cur_proc should be valid on all cores that are not management cores.
+       struct proc *cur_proc;          /* which process context is loaded */
+       struct proc *owning_proc;       /* proc owning the core / cur_ctx */
+       uint32_t owning_vcoreid;        /* vcoreid of owning proc (if applicable */
+       struct user_context *cur_ctx;   /* user ctx we came in on (can be 0) */
+       struct user_context actual_ctx; /* storage for cur_ctx */
+       uint32_t __ctx_depth;           /* don't access directly.  see trap.h. */
+       int __lock_checking_enabled;/* == 1, enables spinlock depth checking */
+       struct kthread *cur_kthread;/* tracks the running kernel context */
+       struct kthread *spare;          /* useful when restarting */
+       struct timer_chain tchain;      /* for the per-core alarm */
+       unsigned int lock_depth;
+       struct trace_ring traces;
+       int cpu_state;
+       uint64_t last_tick_cnt;
+       uint64_t state_ticks[NR_CPU_STATES];
+#ifdef __SHARC__
+       // held spin-locks. this will have to go elsewhere if multiple kernel
+       // threads can share a CPU.
+       // zra: Used by Ivy. Let me know if this should go elsewhere.
+       sharC_env_t sharC_env;
+#endif
+       /* TODO: 64b (not sure if we'll need these at all */
+#ifdef CONFIG_X86
+       taskstate_t *tss;
+       segdesc_t *gdt;
+#endif
+       /* KMSGs */
+       spinlock_t immed_amsg_lock;
+       struct kernel_msg_list NTPTV(a0t) NTPTV(a1t) NTPTV(a2t) immed_amsgs;
+       spinlock_t routine_amsg_lock;
+       struct kernel_msg_list NTPTV(a0t) NTPTV(a1t) NTPTV(a2t) routine_amsgs;
+       /* profiling -- opaque to all but the profiling code. */
+       void *profiling;
+}__attribute__((aligned(ARCH_CL_SIZE)));
+
+/* Allows the kernel to figure out what process is running on this core.  Can be
+ * used just like a pointer to a struct proc. */
+#define current per_cpu_info[core_id()].cur_proc
+/* Allows the kernel to figure out what *user* ctx is on this core's stack.  Can
+ * be used just like a pointer to a struct user_context.  Note the distinction
+ * between kernel and user contexts.  The kernel always returns to its nested,
+ * interrupted contexts via iret/etc.  We never do that for user contexts. */
+#define current_ctx per_cpu_info[core_id()].cur_ctx
+
+typedef struct per_cpu_info NTPTV(t) NTPTV(a0t) NTPTV(a1t) NTPTV(a2t) per_cpu_info_t;
+
+extern per_cpu_info_t (RO per_cpu_info)[MAX_NUM_CPUS];
+extern volatile uint32_t RO num_cpus;
 
 /* SMP bootup functions */
 void smp_boot(void);
-void smp_idle(void);
+void smp_idle(void) __attribute__((noreturn));
+void smp_percpu_init(void); // this must be called by each core individually
+void __arch_pcpu_init(uint32_t coreid);        /* each arch has one of these */
+
+void __set_cpu_state(struct per_cpu_info *pcpui, int state);
+void reset_cpu_state_ticks(int coreid);
 
 /* SMP utility functions */
-int smp_call_function_self(isr_t handler, void* data,
-                           handler_wrapper_t** wait_wrapper);
-int smp_call_function_all(isr_t handler, void* data,
-                          handler_wrapper_t** wait_wrapper);
-int smp_call_function_single(uint8_t dest, isr_t handler, void* data,
-                             handler_wrapper_t** wait_wrapper);
-int smp_call_wait(handler_wrapper_t*SAFE wrapper);
-
-#endif /* !ROS_INC_SMP_H */
+int smp_call_function_self(isr_t handler, void *data,
+                           handler_wrapper_t **wait_wrapper);
+int smp_call_function_all(isr_t handler, void *data,
+                          handler_wrapper_t **wait_wrapper);
+int smp_call_function_single(uint32_t dest, isr_t handler, void *data,
+                             handler_wrapper_t **wait_wrapper);
+int smp_call_wait(handler_wrapper_t *wrapper);
+
+/* PCPUI Trace Rings: */
+struct pcpu_trace_event {
+       int                                                     type;
+       int                                                     arg0;
+       uint64_t                                        arg1;
+};
+
+/* If you want to add a type, use the next available number, increment NR_TYPES,
+ * use your own macro, and provide a handler.  Add your handler to
+ * pcpui_tr_handlers in smp.c. */
+#define PCPUI_TR_TYPE_NULL             0
+#define PCPUI_TR_TYPE_KMSG             1
+#define PCPUI_TR_TYPE_LOCKS            2
+#define PCPUI_NR_TYPES                 3
+
+#ifdef CONFIG_TRACE_KMSGS
+
+# define pcpui_trace_kmsg(pcpui, pc)                                           \
+{                                                                              \
+       struct pcpu_trace_event *e = get_trace_slot_racy(&pcpui->traces);          \
+       if (e) {                                                                   \
+               e->type = PCPUI_TR_TYPE_KMSG;                                          \
+               e->arg1 = pc;                                                          \
+       }                                                                          \
+}
+
+#else
+
+# define pcpui_trace_kmsg(pcpui, pc)
+
+#endif /* CONFIG_TRACE_KMSGS */
+
+
+#ifdef CONFIG_TRACE_LOCKS
+
+# define pcpui_trace_locks(pcpui, lock)                                        \
+{                                                                              \
+       struct pcpu_trace_event *e = get_trace_slot_overwrite(&pcpui->traces);     \
+       if (e) {                                                                   \
+               e->type = PCPUI_TR_TYPE_LOCKS;                                         \
+               e->arg0 = (int)tsc2usec(read_tsc());                                   \
+               e->arg1 = (uintptr_t)lock;                                             \
+       }                                                                          \
+}
+
+#else
+
+# define pcpui_trace_locks(pcpui, lock)
+
+#endif /* CONFIG_TRACE_LOCKS */
+
+/* Run the handlers for all events in a pcpui ring.  Can run on all cores, or
+ * just one core.  'type' selects which event type is handled (0 for all). */
+void pcpui_tr_foreach(int coreid, int type);
+void pcpui_tr_foreach_all(int type);
+void pcpui_tr_reset_all(void);
+void pcpui_tr_reset_and_clear_all(void);
+
+#endif /* ROS_INC_SMP_H */