[Review] core: kernel: Add semihosting functions

Remove unnucessary cast.

Signed-off-by: Alvin Chang <alvinga@andestech.com>

core/kernel/semihosting.c

@@ -126,12 +126,12 @@ int semihosting_open(const char *fname, int flags)
 size_t semihosting_read(int fd, void *ptr, size_t len)
 {
 	struct semihosting_param_t arg = {
-		.param0 = (uintptr_t)fd,
+		.param0 = fd,
 		.param1 = (uintptr_t)ptr,
-		.param2 = (uintptr_t)len
+		.param2 = len
 	};
 
-	return (size_t)__do_semihosting(SEMIHOSTING_SYS_READ, (uintptr_t)&arg);
+	return __do_semihosting(SEMIHOSTING_SYS_READ, (uintptr_t)&arg);
 }
 
 /**
@@ -145,12 +145,12 @@ size_t semihosting_read(int fd, void *ptr, size_t len)
 size_t semihosting_write(int fd, const void *ptr, size_t len)
 {
 	struct semihosting_param_t arg = {
-		.param0 = (uintptr_t)fd,
+		.param0 = fd,
 		.param1 = (uintptr_t)ptr,
-		.param2 = (uintptr_t)len
+		.param2 = len
 	};
 
-	return (size_t)__do_semihosting(SEMIHOSTING_SYS_WRITE, (uintptr_t)&arg);
+	return __do_semihosting(SEMIHOSTING_SYS_WRITE, (uintptr_t)&arg);
 }
 
 /**
@@ -162,7 +162,7 @@ size_t semihosting_write(int fd, const void *ptr, size_t len)
 int semihosting_close(int fd)
 {
 	struct semihosting_param_t arg = {
-		.param0 = (uintptr_t)fd,
+		.param0 = fd,
 	};
 
 	return (int)__do_semihosting(SEMIHOSTING_SYS_CLOSE, (uintptr_t)&arg);