#ifndef _ASM_POWERPC_DTL_H
#define _ASM_POWERPC_DTL_H

#include <linux/rwsem.h>
#include <asm/lppaca.h>

/*
 * Layout of entries in the hypervisor's dispatch trace log buffer.
 */
struct dtl_entry {
        u8      dispatch_reason;
        u8      preempt_reason;
        __be16  processor_id;
        __be32  enqueue_to_dispatch_time;
        __be32  ready_to_enqueue_time;
        __be32  waiting_to_ready_time;
        __be64  timebase;
        __be64  fault_addr;
        __be64  srr0;
        __be64  srr1;
};

#define DISPATCH_LOG_BYTES      4096    /* bytes per cpu */
#define N_DISPATCH_LOG          (DISPATCH_LOG_BYTES / sizeof(struct dtl_entry))

/*
 * Dispatch trace log event enable mask:
 *   0x1: voluntary virtual processor waits
 *   0x2: time-slice preempts
 *   0x4: virtual partition memory page faults
 */
#define DTL_LOG_CEDE            0x1
#define DTL_LOG_PREEMPT         0x2
#define DTL_LOG_FAULT           0x4
#define DTL_LOG_ALL             (DTL_LOG_CEDE | DTL_LOG_PREEMPT | DTL_LOG_FAULT)

extern struct kmem_cache *dtl_cache;
extern struct rw_semaphore dtl_access_lock;

extern void register_dtl_buffer(int cpu);
extern void alloc_dtl_buffers(unsigned long *time_limit);

#endif /* _ASM_POWERPC_DTL_H */