[RFC PATCH 2/4] semihosting: Change semihosting file operation functions into global symbols

[Sughosh Ganu]

Change the semihosting file operation functions into external symbols
so that they can be called from outside the file. These functions
would be required to be called for implementing firmware update
functionality for the qemu arm64 platform.

Signed-off-by: Sughosh Ganu <sughosh.ganu at linaro.org>
---
 arch/arm/lib/semihosting.c |  7 ++++---
 include/semihosting.h      | 13 +++++++++++++
 2 files changed, 17 insertions(+), 3 deletions(-)
 create mode 100644 include/semihosting.h

diff --git a/arch/arm/lib/semihosting.c b/arch/arm/lib/semihosting.c
index 2658026cf4..3aeda1303a 100644
--- a/arch/arm/lib/semihosting.c
+++ b/arch/arm/lib/semihosting.c
@@ -13,6 +13,7 @@
  */
 #include <common.h>
 #include <command.h>
+#include <semihosting.h>
 
 #define SYSOPEN		0x01
 #define SYSCLOSE	0x02
@@ -43,7 +44,7 @@ static noinline long smh_trap(unsigned int sysnum, void *addr)
  * Open a file on the host. Mode is "r" or "rb" currently. Returns a file
  * descriptor or -1 on error.
  */
-static long smh_open(const char *fname, char *modestr)
+long smh_open(const char *fname, char *modestr)
 {
 	long fd;
 	unsigned long mode;
@@ -82,7 +83,7 @@ static long smh_open(const char *fname, char *modestr)
 /*
  * Read 'len' bytes of file into 'memp'. Returns 0 on success, else failure
  */
-static long smh_read(long fd, void *memp, size_t len)
+long smh_read(long fd, void *memp, size_t len)
 {
 	long ret;
 	struct smh_read_s {
@@ -116,7 +117,7 @@ static long smh_read(long fd, void *memp, size_t len)
 /*
  * Close the file using the file descriptor
  */
-static long smh_close(long fd)
+long smh_close(long fd)
 {
 	long ret;
 
diff --git a/include/semihosting.h b/include/semihosting.h
new file mode 100644
index 0000000000..f1bf419275
--- /dev/null
+++ b/include/semihosting.h
@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2020, Linaro Limited
+ */
+
+#if !defined _SEMIHOSTING_H_
+#define _SEMIHOSTING_H_
+
+long smh_open(const char *fname, char *modestr);
+long smh_read(long fd, void *memp, size_t len);
+long smh_close(long fd);
+
+#endif /* _SEMIHOSTING_H_ */
-- 
2.17.1