Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / include / trace.h

diff --git a/qemu/roms/u-boot/include/trace.h b/qemu/roms/u-boot/include/trace.h
new file mode 100644 (file)
index 0000000..871327f
--- /dev/null
+++ b/qemu/roms/u-boot/include/trace.h
@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 2012 The Chromium OS Authors.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#ifndef __TRACE_H
+#define __TRACE_H
+
+enum {
+       /*
+        * This affects the granularity of our trace. We can bin function
+        * entry points into groups on the basis that functions typically
+        * have a minimum size, so entry points can't appear any closer
+        * than this to each other.
+        *
+        * 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.
+        *
+        * 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 */
+};
+
+enum trace_chunk_type {
+       TRACE_CHUNK_FUNCS,
+       TRACE_CHUNK_CALLS,
+};
+
+/* A trace record for a function, as written to the profile output file */
+struct trace_output_func {
+       uint32_t offset;                /* Function offset into code */
+       uint32_t call_count;            /* Number of times called */
+};
+
+/* A header at the start of the trace output buffer */
+struct trace_output_hdr {
+       enum trace_chunk_type type;     /* Record type */
+       uint32_t rec_count;             /* Number of records */
+};
+
+/* Print statistics about traced function calls */
+void trace_print_stats(void);
+
+/**
+ * Dump a list of functions and call counts into a buffer
+ *
+ * Each record in the buffer is a struct trace_func_stats. The 'needed'
+ * parameter returns the number of bytes needed to complete the operation,
+ * which may be more than buff_size if your buffer is too small.
+ *
+ * @param buff         Buffer in which to place data, or NULL to count size
+ * @param buff_size    Size of buffer
+ * @param needed       Returns number of bytes used / needed
+ * @return 0 if ok, -1 on error (buffer exhausted)
+ */
+int trace_list_functions(void *buff, int buff_size, unsigned *needed);
+
+/* Flags for ftrace_record */
+enum ftrace_flags {
+       FUNCF_EXIT              = 0UL << 30,
+       FUNCF_ENTRY             = 1UL << 30,
+       FUNCF_TEXTBASE          = 2UL << 30,
+
+       FUNCF_TIMESTAMP_MASK    = 0x3fffffff,
+};
+
+#define TRACE_CALL_TYPE(call)  ((call)->flags & 0xc0000000UL)
+
+/* Information about a single function entry/exit */
+struct trace_call {
+       uint32_t func;          /* Function offset */
+       uint32_t caller;        /* Caller function offset */
+       uint32_t flags;         /* Flags and timestamp */
+};
+
+int trace_list_calls(void *buff, int buff_size, unsigned int *needed);
+
+/**
+ * Turn function tracing on and off
+ *
+ * Don't enable trace if it has not been initialised.
+ *
+ * @param enabled      1 to enable trace, 0 to disable
+ */
+void trace_set_enabled(int enabled);
+
+#ifdef CONFIG_TRACE_EARLY
+int trace_early_init(void);
+#else
+static inline int trace_early_init(void)
+{
+       return 0;
+}
+#endif
+
+/**
+ * Init the trace system
+ *
+ * This should be called after relocation with a suitably large buffer
+ * (typically as large as the U-Boot text area)
+ *
+ * @param buff         Pointer to trace buffer
+ * @param buff_size    Size of trace buffer
+ */
+int trace_init(void *buff, size_t buff_size);
+
+#endif