[U-Boot] [RFC PATCH v2 03/13] sandbox: Support iotrace feature

[Simon Glass]

Support the iotrace feature for sandbox, and enable it, using some dummy
I/O access methods.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

Changes in v2:
- Add a new patch to enable iotrace for sandbox

 arch/sandbox/include/asm/io.h | 10 ++++++++++
 include/configs/sandbox.h     |  3 +++
 2 files changed, 13 insertions(+)

diff --git a/arch/sandbox/include/asm/io.h b/arch/sandbox/include/asm/io.h
index 7956041..895fcb8 100644
--- a/arch/sandbox/include/asm/io.h
+++ b/arch/sandbox/include/asm/io.h
@@ -40,4 +40,14 @@ static inline void unmap_sysmem(const void *vaddr)
 /* Map from a pointer to our RAM buffer */
 phys_addr_t map_to_sysmem(const void *ptr);
 
+/* Define nops for sandbox I/O access */
+#define readb(addr) 0
+#define readw(addr) 0
+#define readl(addr) 0
+#define writeb(v, addr)
+#define writew(v, addr)
+#define writel(v, addr)
+
+#include <iotrace.h>
+
 #endif
diff --git a/include/configs/sandbox.h b/include/configs/sandbox.h
index fa62cb6..8ca2a55 100644
--- a/include/configs/sandbox.h
+++ b/include/configs/sandbox.h
@@ -16,6 +16,9 @@
 
 #endif
 
+#define CONFIG_IO_TRACE
+#define CONFIG_CMD_IO_TRACE
+
 #define CONFIG_SYS_TIMER_RATE		1000000
 
 #define CONFIG_BOOTSTAGE
-- 
1.9.1.423.g4596e3a