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authorDominik Dingel <dingel@linux.vnet.ibm.com>2013-04-30 07:15:58 +0000
committerAlexander Graf <agraf@suse.de>2013-05-06 17:30:01 +0200
commitff151f4ec977c38266b79ebfbb6e8689f2121d4f (patch)
treecec9b0494b8beda1167046090f7b827e0bb3afec
parentba1509c0a99ad4c852c22cbd46d244ec7dc90402 (diff)
downloadqemu-arm-ff151f4ec977c38266b79ebfbb6e8689f2121d4f.tar.gz
S390: BIOS boot from given device
Use the passed device, if there is no device, use the first applicable device. Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
-rw-r--r--pc-bios/s390-ccw/main.c24
-rw-r--r--pc-bios/s390-ccw/start.S2
2 files changed, 20 insertions, 6 deletions
diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
index fd40fa582a..1665c57225 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -12,6 +12,7 @@
struct subchannel_id blk_schid;
char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE)));
+uint64_t boot_value;
void virtio_panic(const char *string)
{
@@ -20,15 +21,22 @@ void virtio_panic(const char *string)
while (1) { }
}
-static void virtio_setup(void)
+static void virtio_setup(uint64_t dev_info)
{
struct schib schib;
int i;
int r;
bool found = false;
-
+ bool check_devno = false;
+ uint16_t dev_no = -1;
blk_schid.one = 1;
+ if (dev_info != -1) {
+ check_devno = true;
+ dev_no = dev_info & 0xffff;
+ debug_print_int("device no. ", dev_no);
+ }
+
for (i = 0; i < 0x10000; i++) {
blk_schid.sch_no = i;
r = stsch_err(blk_schid, &schib);
@@ -36,9 +44,11 @@ static void virtio_setup(void)
break;
}
if (schib.pmcw.dnv) {
- if (virtio_is_blk(blk_schid)) {
- found = true;
- break;
+ if (!check_devno || (schib.pmcw.dev == dev_no)) {
+ if (virtio_is_blk(blk_schid)) {
+ found = true;
+ break;
+ }
}
}
}
@@ -53,7 +63,9 @@ static void virtio_setup(void)
int main(void)
{
sclp_setup();
- virtio_setup();
+ debug_print_int("boot reg[7] ", boot_value);
+ virtio_setup(boot_value);
+
if (zipl_load() < 0)
sclp_print("Failed to load OS from hard disk\n");
disabled_wait();
diff --git a/pc-bios/s390-ccw/start.S b/pc-bios/s390-ccw/start.S
index 09deee7fc0..5d5df0d616 100644
--- a/pc-bios/s390-ccw/start.S
+++ b/pc-bios/s390-ccw/start.S
@@ -14,6 +14,8 @@
_start:
larl %r15, stack + 0x8000 /* Set up stack */
+larl %r6, boot_value
+stg %r7, 0(%r6) /* save the boot_value before any function calls */
j main /* And call C */
/*