[kvm-unit-tests,v3,4/7] s390x: compile sclp-ascii.c

Commit Message

David Hildenbrand May 22, 2017, 8:56 a.m. UTC

We can reuse strlen and memcpy. __pa(x) is already defined in page.h
We don't have (and need) defines for error values and consuming sclp
irqs is not required, as we won't be passing control to some other OS.

Signed-off-by: David Hildenbrand <[e-mail]>
---
 lib/s390x/sclp-ascii.c | 28 +++++++---------------------
 lib/s390x/sclp.h       |  2 --
 s390x/Makefile         |  1 +
 3 files changed, 8 insertions(+), 23 deletions(-)

Comments

Thomas Huth May 22, 2017, 9:47 a.m. UTC | #1

On 22.05.2017 10:56, David Hildenbrand wrote:
> We can reuse strlen and memcpy. __pa(x) is already defined in page.h
> We don't have (and need) defines for error values and consuming sclp
> irqs is not required, as we won't be passing control to some other OS.
> 
> Signed-off-by: David Hildenbrand <[e-mail]>
> ---
>  lib/s390x/sclp-ascii.c | 28 +++++++---------------------
>  lib/s390x/sclp.h       |  2 --
>  s390x/Makefile         |  1 +
>  3 files changed, 8 insertions(+), 23 deletions(-)

Reviewed-by: Thomas Huth <[e-mail]>

Patch

diff --git a/lib/s390x/sclp-ascii.c b/lib/s390x/sclp-ascii.c
index dc1c3e4..dfb9e68 100644
--- a/lib/s390x/sclp-ascii.c
+++ b/lib/s390x/sclp-ascii.c
@@ -8,7 +8,9 @@ 
  * directory.
  */
 
-#include "s390-ccw.h"
+#include <libcflat.h>
+#include <string.h>
+#include <asm/page.h>
 #include "sclp.h"
 
 static char _sccb[PAGE_SIZE] __attribute__((__aligned__(4096)));
@@ -24,11 +26,10 @@  static int sclp_service_call(unsigned int command, void *sccb)
                 "       srl     %0,28"
                 : "=&d" (cc) : "d" (command), "a" (__pa(sccb))
                 : "cc", "memory");
-        consume_sclp_int();
         if (cc == 3)
-                return -EIO;
+                return -1;
         if (cc == 2)
-                return -EBUSY;
+                return -1;
         return 0;
 }
 
@@ -51,24 +52,9 @@  void sclp_setup(void)
     sclp_set_write_mask();
 }
 
-static int _strlen(const char *str)
-{
-    int i;
-    for (i = 0; *str; i++)
-        str++;
-    return i;
-}
-
-static void _memcpy(char *dest, const char *src, int len)
-{
-    int i;
-    for (i = 0; i < len; i++)
-        dest[i] = src[i];
-}
-
 void sclp_print(const char *str)
 {
-    int len = _strlen(str);
+    int len = strlen(str);
     WriteEventData *sccb = (void *)_sccb;
 
     sccb->h.length = sizeof(WriteEventData) + len;
@@ -76,7 +62,7 @@  void sclp_print(const char *str)
     sccb->ebh.length = sizeof(EventBufferHeader) + len;
     sccb->ebh.type = SCLP_EVENT_ASCII_CONSOLE_DATA;
     sccb->ebh.flags = 0;
-    _memcpy(sccb->data, str, len);
+    memcpy(sccb->data, str, len);
 
     sclp_service_call(SCLP_CMD_WRITE_EVENT_DATA, sccb);
 }
diff --git a/lib/s390x/sclp.h b/lib/s390x/sclp.h
index 3cbfb78..c48cc21 100644
--- a/lib/s390x/sclp.h
+++ b/lib/s390x/sclp.h
@@ -102,6 +102,4 @@  typedef struct ReadEventData {
     uint32_t mask;
 } __attribute__((packed)) ReadEventData;
 
-#define __pa(x) (x)
-
 #endif /* SCLP_H */
diff --git a/s390x/Makefile b/s390x/Makefile
index d468029..e80add0 100644
--- a/s390x/Makefile
+++ b/s390x/Makefile
@@ -19,6 +19,7 @@  cflatobjs += lib/util.o
 cflatobjs += lib/alloc.o
 cflatobjs += lib/s390x/io.o
 cflatobjs += lib/s390x/stack.o
+cflatobjs += lib/s390x/sclp-ascii.o
 
 OBJDIRS += lib/s390x