| /* 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> |
| |
| #define TBUF_SZ (1024 * 1024) |
| |
| struct cpu_thread; |
| |
| /* Here's one we prepared earlier. */ |
| void init_boot_tracebuf(struct cpu_thread *boot_cpu); |
| |
| struct trace_info { |
| /* Lock for writers. */ |
| struct lock lock; |
| /* Exposed to kernel. */ |
| struct tracebuf tb; |
| }; |
| |
| /* 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 */ |