1 files changed, 16 insertions, 22 deletions

diff --git a/pc-bios/s390-ccw/netmain.c b/pc-bios/s390-ccw/netmain.c
index 5cd619b2d6..e46e470db4 100644
--- a/pc-bios/s390-ccw/netmain.c
+++ b/pc-bios/s390-ccw/netmain.c
@@ -41,7 +41,6 @@
 #define DEFAULT_TFTP_RETRIES 20
 
 extern char _start[];
-void write_iplb_location(void) {}
 
 #define KERNEL_ADDR             ((void *)0L)
 #define KERNEL_MAX_SIZE         ((long)_start)
@@ -50,10 +49,9 @@ void write_iplb_location(void) {}
 /* STSI 3.2.2 offset of first vmdb + offset of uuid inside vmdb */
 #define STSI322_VMDB_UUID_OFFSET ((8 + 12) * 4)
 
-IplParameterBlock iplb __attribute__((aligned(PAGE_SIZE)));
 static char cfgbuf[2048];
 
-static SubChannelId net_schid = { .one = 1 };
+SubChannelId net_schid = { .one = 1 };
 static uint8_t mac[6];
 static uint64_t dest_timer;
 
@@ -293,7 +291,7 @@ static int load_kernel_with_initrd(filename_ip_t *fn_ip,
     printf("Loading pxelinux.cfg entry '%s'\n", entry->label);
 
     if (!entry->kernel) {
-        printf("Kernel entry is missing!\n");
+        puts("Kernel entry is missing!\n");
         return -1;
     }
 
@@ -438,15 +436,6 @@ static int net_try_direct_tftp_load(filename_ip_t *fn_ip)
     return rc;
 }
 
-void write_subsystem_identification(void)
-{
-    SubChannelId *schid = (SubChannelId *) 184;
-    uint32_t *zeroes = (uint32_t *) 188;
-
-    *schid = net_schid;
-    *zeroes = 0;
-}
-
 static bool find_net_dev(Schib *schib, int dev_no)
 {
     int i, r;
@@ -475,7 +464,7 @@ static bool find_net_dev(Schib *schib, int dev_no)
     return false;
 }
 
-static void virtio_setup(void)
+static bool virtio_setup(void)
 {
     Schib schib;
     int ssid;
@@ -489,7 +478,7 @@ static void virtio_setup(void)
      */
     enable_mss_facility();
 
-    if (store_iplb(&iplb)) {
+    if (have_iplb || store_iplb(&iplb)) {
         IPL_assert(iplb.pbt == S390_IPL_TYPE_CCW, "IPL_TYPE_CCW expected");
         dev_no = iplb.ccw.devno;
         debug_print_int("device no. ", dev_no);
@@ -506,22 +495,26 @@ static void virtio_setup(void)
         }
     }
 
-    IPL_assert(found, "No virtio net device found");
+    return found;
 }
 
-void main(void)
+int netmain(void)
 {
     filename_ip_t fn_ip;
     int rc, fnlen;
 
     sclp_setup();
-    sclp_print("Network boot starting...\n");
+    puts("Network boot starting...");
 
-    virtio_setup();
+    if (!virtio_setup()) {
+        puts("No virtio net device found.");
+        return -1;
+    }
 
     rc = net_init(&fn_ip);
     if (rc) {
-        panic("Network initialization failed. Halting.\n");
+        puts("Network initialization failed.");
+        return -1;
     }
 
     fnlen = strlen(fn_ip.filename);
@@ -535,9 +528,10 @@ void main(void)
     net_release(&fn_ip);
 
     if (rc > 0) {
-        sclp_print("Network loading done, starting kernel...\n");
+        puts("Network loading done, starting kernel...");
         jump_to_low_kernel();
     }
 
-    panic("Failed to load OS from network\n");
+    puts("Failed to load OS from network.");
+    return -1;
 }