diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/timer.h | 13 | ||||
| -rw-r--r-- | include/trace.h | 18 |
2 files changed, 23 insertions, 8 deletions
diff --git a/include/timer.h b/include/timer.h index d33a26e28fe..311ce6b2c3a 100644 --- a/include/timer.h +++ b/include/timer.h @@ -9,11 +9,16 @@ #define timer_get_ops(dev) ((struct timer_ops *)(dev)->driver->ops) /** - * dm_timer_init() - initialize a timer for time keeping. On success - * initializes gd->timer so that lib/timer can use it for future - * referrence. + * dm_timer_init() - set up a timer for time keeping * - * Return: 0 on success or error number + * Sets up gd->timer if the device is not already bound, making sure it is + * probed and ready for use + * + * On success, inits gd->timer so that lib/timer can use it for future reference + * + * Returns: 0 on success, -EAGAIN if driver model is not ready yet, -ENODEV if + * no timer could be found, other error if the timer could not be bound or + * probed */ int dm_timer_init(void); diff --git a/include/trace.h b/include/trace.h index e7aee024f03..763d6d1255a 100644 --- a/include/trace.h +++ b/include/trace.h @@ -6,6 +6,8 @@ #ifndef __TRACE_H #define __TRACE_H +/* this file is included from a tool so uses uint32_t instead of u32, etc. */ + enum { /* * This affects the granularity of our trace. We can bin function @@ -15,14 +17,18 @@ enum { * * The value here assumes a minimum instruction size of 4 bytes, * or that instructions are 2 bytes but there are at least 2 of - * them in every function. + * them in every function. Given that each function needs a call to + * __cyg_profile_func_enter() and __cyg_profile_func_exit() as well, + * we cannot have functions smaller that 16 bytes. * * Increasing this value reduces the number of functions we can * resolve, but reduces the size of the uintptr_t array used for * our function list, which is the length of the code divided by * this value. */ - FUNC_SITE_SIZE = 4, /* distance between function sites */ + FUNC_SITE_SIZE = 16, /* distance between function sites */ + + TRACE_VERSION = 1, }; enum trace_chunk_type { @@ -39,7 +45,11 @@ struct trace_output_func { /* A header at the start of the trace output buffer */ struct trace_output_hdr { enum trace_chunk_type type; /* Record type */ - size_t rec_count; /* Number of records */ + uint32_t version; /* Version (TRACE_VERSION) */ + uint32_t rec_count; /* Number of records */ + uint32_t spare; /* 0 */ + uint64_t text_base; /* Value of CONFIG_TEXT_BASE */ + uint64_t spare2; /* 0 */ }; /* Print statistics about traced function calls */ @@ -63,7 +73,7 @@ int trace_list_functions(void *buff, size_t buff_size, size_t *needed); enum ftrace_flags { FUNCF_EXIT = 0UL << 30, FUNCF_ENTRY = 1UL << 30, - FUNCF_TEXTBASE = 2UL << 30, + /* two more values are available */ FUNCF_TIMESTAMP_MASK = 0x3fffffff, }; |