X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=include%2Fiotrace.h;h=be1d2753e195632fbf6daace82a2ad2165532257;hb=9dcb9d763d328da903194d0f14f97d9620a6f52d;hp=e4ceb6180537ed62ce4ae96f60ca56268ab9f5e8;hpb=08ca213acadef61748dc62d48b0f5c4bed8b8c2d;p=oweals%2Fu-boot.git

diff --git a/include/iotrace.h b/include/iotrace.h
index e4ceb61805..be1d2753e1 100644
--- a/include/iotrace.h
+++ b/include/iotrace.h
@@ -1,14 +1,41 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (c) 2014 Google, Inc.
- *
- * SPDX-License-Identifier:     GPL-2.0+
  */
 
 #ifndef __IOTRACE_H
 #define __IOTRACE_H
 
+//#include <common.h>
 #include <linux/types.h>
 
+/* Support up to the machine word length for now */
+typedef ulong iovalue_t;
+
+enum iotrace_flags {
+	IOT_8 = 0,
+	IOT_16,
+	IOT_32,
+
+	IOT_READ = 0 << 3,
+	IOT_WRITE = 1 << 3,
+};
+
+/**
+ * struct iotrace_record - Holds a single I/O trace record
+ *
+ * @flags: I/O access type
+ * @timestamp: Timestamp of access
+ * @addr: Address of access
+ * @value: Value written or read
+ */
+struct iotrace_record {
+	enum iotrace_flags flags;
+	u64 timestamp;
+	phys_addr_t addr;
+	iovalue_t value;
+};
+
 /*
  * This file is designed to be included in arch/<arch>/include/asm/io.h.
  * It redirects all IO access through a tracing/checksumming feature for
@@ -59,6 +86,30 @@ void iotrace_reset_checksum(void);
  */
 u32 iotrace_get_checksum(void);
 
+/**
+ * iotrace_set_region() - Set whether iotrace is limited to a specific
+ * io region.
+ *
+ * Defines the address and size of the limited region.
+ *
+ * @start: address of the beginning of the region
+ * @size: size of the region in bytes.
+ */
+void iotrace_set_region(ulong start, ulong size);
+
+/**
+ * iotrace_reset_region() - Reset the region limit
+ */
+void iotrace_reset_region(void);
+
+/**
+ * iotrace_get_region() - Get region information
+ *
+ * @start: Returns start address of region
+ * @size: Returns size of region in bytes
+ */
+void iotrace_get_region(ulong *start, ulong *size);
+
 /**
  * iotrace_set_enabled() - Set whether iotracing is enabled or not
  *
@@ -95,11 +146,12 @@ void iotrace_set_buffer(ulong start, ulong size);
  * iotrace_get_buffer() - Get buffer information
  *
  * @start: Returns start address of buffer
- * @size: Returns size of buffer in bytes
+ * @size: Returns actual size of buffer in bytes
+ * @needed_size: Returns needed size of buffer in bytes
  * @offset: Returns the byte offset where the next output trace record will
  * @count: Returns the number of trace records recorded
  * be written (or would be if the buffer was large enough)
  */
-void iotrace_get_buffer(ulong *start, ulong *size, ulong *offset, ulong *count);
+void iotrace_get_buffer(ulong *start, ulong *size, ulong *needed_size, ulong *offset, ulong *count);
 
 #endif /* __IOTRACE_H */