s390x: compile sclp-ascii.c

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 <david@redhat.com>
Message-Id: <20170522085702.17856-5-david@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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);
 }

lib/s390x/sclp.h

@@ -102,6 +102,4 @@ typedef struct ReadEventData {
     uint32_t mask;
 } __attribute__((packed)) ReadEventData;
 
-#define __pa(x) (x)
-
 #endif /* SCLP_H */

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