pc-bios/s390-ccw: Link the netboot code into the main s390-ccw.img binary

We originally built a separate binary for the netboot code since it
was considered as experimental and we could not be sure that the
necessary SLOF module had been checked out. Time passed, the code
proved its usefulness, and the build system nowadays makes sure that
the SLOF module is checked out if you have a s390x compiler available
for building the s390-ccw bios. So there is no real compelling reason
anymore to keep the netboot code in a separate binary. Linking the
code together with the main s390-ccw.img will make future enhancements
much easier, like supporting more than one boot device.

Co-authored by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Jared Rossi <jrossi@linux.ibm.com>
Message-ID: <20241020012953.1380075-4-jrossi@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

1 files changed, 2 insertions, 13 deletions

diff --git a/pc-bios/s390-ccw/netmain.c b/pc-bios/s390-ccw/netmain.c
index 509119be15..bc6ad8695f 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;
 
@@ -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;
@@ -509,7 +498,7 @@ static void virtio_setup(void)
     IPL_assert(found, "No virtio net device found");
 }
 
-void main(void)
+void netmain(void)
 {
     filename_ip_t fn_ip;
     int rc, fnlen;