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/* Copyright 2013-2014 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __TRACE_H
#define __TRACE_H
#include <ccan/short_types/short_types.h>
#include <stddef.h>
#include <lock.h>
#include <trace_types.h>
struct cpu_thread;
/* Here's one we prepared earlier. */
void init_boot_tracebuf(struct cpu_thread *boot_cpu);
struct trace_info {
/* Lock for writers. Exposed to kernel. */
struct lock lock;
/* Exposed to kernel. */
struct tracebuf tb;
};
#define TBUF_SZ ((1024 * 1024) - sizeof(struct trace_info) - sizeof(union trace))
/* Allocate trace buffers once we know memory topology */
void init_trace_buffers(void);
/* This will fill in timestamp and cpu; you must do type and len. */
void trace_add(union trace *trace, u8 type, u16 len);
/* Put trace node into dt. */
void trace_add_node(void);
#endif /* __TRACE_H */
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