arm: smh: Export semihosting functions

This exports semihosting functions for use in other files. The header is
in include/ and not arm/include/asm because I anticipate that RISC-V may
want to add their own implementation at some point.

smh_len_fd has been renamed to smh_flen to more closely match the
semihosting spec.

Signed-off-by: Sean Anderson <sean.anderson@seco.com>

diff --git a/arch/arm/lib/semihosting.c b/arch/arm/lib/semihosting.c
index 9fd82459b24a4598a8afa994ecec6eb2b24294f5..c38892fdd88822df46d99711e73802919b5cccc3 100644 (file)
--- a/arch/arm/lib/semihosting.c
+++ b/arch/arm/lib/semihosting.c
@@ -15,6 +15,7 @@
 #include <command.h>
 #include <env.h>
 #include <log.h>
+#include <semihosting.h>
 
 #define SYSOPEN                0x01
 #define SYSCLOSE       0x02
@@ -45,7 +46,7 @@ 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;
@@ -84,7 +85,7 @@ 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 {
@@ -118,7 +119,7 @@ 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;
 
@@ -134,7 +135,7 @@ static long smh_close(long fd)
 /*
  * Get the file length from the file descriptor
  */
-static long smh_len_fd(long fd)
+long smh_flen(long fd)
 {
        long ret;
 
@@ -158,7 +159,7 @@ static int smh_load_file(const char * const name, ulong load_addr,
        if (fd == -1)
                return -1;
 
-       len = smh_len_fd(fd);
+       len = smh_flen(fd);
        if (len < 0) {
                smh_close(fd);
                return -1;

diff --git a/include/semihosting.h b/include/semihosting.h
new file mode 100644 (file)
index 0000000..3843863
--- /dev/null
+++ b/include/semihosting.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2022 Sean Anderson <sean.anderson@seco.com>
+ */
+
+#ifndef _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);
+long smh_flen(long fd);
+
+#endif /* _SEMIHOSTING_H */