From 92f2ca38b01578075208799dd2f060fcc3638ed4 Mon Sep 17 00:00:00 2001 From: Alexander Graf Date: Mon, 22 Apr 2013 20:57:58 +0200 Subject: 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 --- pc-bios/s390-ccw/main.c | 56 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 pc-bios/s390-ccw/main.c (limited to 'pc-bios/s390-ccw/main.c') 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 + * + * 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) { } +} -- cgit v1.2.1