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authorAlexander Graf <agraf@suse.de>2013-04-22 20:57:58 +0200
committerAlexander Graf <agraf@suse.de>2013-04-26 20:18:24 +0200
commit92f2ca38b01578075208799dd2f060fcc3638ed4 (patch)
treed4f35e0a826559a37eec31452d95db14d98bf375 /pc-bios/s390-ccw
parent80fea6e8930384d7d8adae0eb1a00acb7647f7ec (diff)
S390: ccw firmware: Add main program
This C file is the main driving piece of the s390 ccw firmware. It provides a search for a workable block device, sets it as the default to boot off of and boots from it. Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'pc-bios/s390-ccw')
-rw-r--r--pc-bios/s390-ccw/main.c56
1 files changed, 56 insertions, 0 deletions
diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
new file mode 100644
index 0000000000..0913aac5c1
--- /dev/null
+++ b/pc-bios/s390-ccw/main.c
@@ -0,0 +1,56 @@
+/*
+ * S390 virtio-ccw loading program
+ *
+ * Copyright (c) 2013 Alexander Graf <agraf@suse.de>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+#include "s390-ccw.h"
+
+struct subchannel_id blk_schid;
+char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE)));
+
+void virtio_panic(const char *string)
+{
+ sclp_print(string);
+ while (1) { }
+}
+
+static void virtio_setup(void)
+{
+ struct irb irb;
+ int i;
+ int r;
+ bool found = false;
+
+ blk_schid.one = 1;
+
+ for (i = 0; i < 0x10000; i++) {
+ blk_schid.sch_no = i;
+ r = tsch(blk_schid, &irb);
+ if (r != 3) {
+ if (virtio_is_blk(blk_schid)) {
+ found = true;
+ break;
+ }
+ }
+ }
+
+ if (!found) {
+ virtio_panic("No virtio-blk device found!\n");
+ }
+
+ virtio_setup_block(blk_schid);
+}
+
+int main(void)
+{
+ sclp_setup();
+ virtio_setup();
+ if (zipl_load() < 0)
+ sclp_print("Failed to load OS from hard disk\n");
+ while (1) { }
+}