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authorDon Dugger <n0ano@n0ano.com>2016-06-03 03:33:22 +0000
committerGerrit Code Review <gerrit@172.30.200.206>2016-06-03 03:33:23 +0000
commitda27230f80795d0028333713f036d44c53cb0e68 (patch)
treeb3d379eaf000adf72b36cb01cdf4d79c3e3f064c /qemu/pc-bios/s390-ccw/main.c
parent0e68cb048bb8aadb14675f5d4286d8ab2fc35449 (diff)
parent437fd90c0250dee670290f9b714253671a990160 (diff)
Merge "These changes are the raw update to qemu-2.6."
Diffstat (limited to 'qemu/pc-bios/s390-ccw/main.c')
-rw-r--r--qemu/pc-bios/s390-ccw/main.c87
1 files changed, 49 insertions, 38 deletions
diff --git a/qemu/pc-bios/s390-ccw/main.c b/qemu/pc-bios/s390-ccw/main.c
index 584d4a276..1c9e0791a 100644
--- a/qemu/pc-bios/s390-ccw/main.c
+++ b/qemu/pc-bios/s390-ccw/main.c
@@ -12,9 +12,8 @@
#include "virtio.h"
char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE)));
-char ring_area[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE)));
uint64_t boot_value;
-static struct subchannel_id blk_schid = { .one = 1 };
+static SubChannelId blk_schid = { .one = 1 };
/*
* Priniciples of Operations (SA22-7832-09) chapter 17 requires that
@@ -23,7 +22,7 @@ static struct subchannel_id blk_schid = { .one = 1 };
*/
void write_subsystem_identification(void)
{
- struct subchannel_id *schid = (struct subchannel_id *) 184;
+ SubChannelId *schid = (SubChannelId *) 184;
uint32_t *zeroes = (uint32_t *) 188;
*schid = blk_schid;
@@ -31,60 +30,72 @@ void write_subsystem_identification(void)
}
-void virtio_panic(const char *string)
+void panic(const char *string)
{
sclp_print(string);
disabled_wait();
while (1) { }
}
+static bool find_dev(Schib *schib, int dev_no)
+{
+ int i, r;
+
+ for (i = 0; i < 0x10000; i++) {
+ blk_schid.sch_no = i;
+ r = stsch_err(blk_schid, schib);
+ if ((r == 3) || (r == -EIO)) {
+ break;
+ }
+ if (!schib->pmcw.dnv) {
+ continue;
+ }
+ if (!virtio_is_supported(blk_schid)) {
+ continue;
+ }
+ if ((dev_no < 0) || (schib->pmcw.dev == dev_no)) {
+ return true;
+ }
+ }
+
+ return false;
+}
+
static void virtio_setup(uint64_t dev_info)
{
- struct schib schib;
- int i;
- int r;
+ Schib schib;
+ int ssid;
bool found = false;
- bool check_devno = false;
- uint16_t dev_no = -1;
+ uint16_t dev_no;
+
+ /*
+ * We unconditionally enable mss support. In every sane configuration,
+ * this will succeed; and even if it doesn't, stsch_err() can deal
+ * with the consequences.
+ */
+ enable_mss_facility();
if (dev_info != -1) {
- check_devno = true;
dev_no = dev_info & 0xffff;
debug_print_int("device no. ", dev_no);
blk_schid.ssid = (dev_info >> 16) & 0x3;
- if (blk_schid.ssid != 0) {
- debug_print_int("ssid ", blk_schid.ssid);
- if (enable_mss_facility() != 0) {
- virtio_panic("Failed to enable mss facility\n");
- }
- }
- }
-
- for (i = 0; i < 0x10000; i++) {
- blk_schid.sch_no = i;
- r = stsch_err(blk_schid, &schib);
- if (r == 3) {
- break;
- }
- if (schib.pmcw.dnv) {
- if (!check_devno || (schib.pmcw.dev == dev_no)) {
- if (virtio_is_blk(blk_schid)) {
- found = true;
- break;
- }
+ debug_print_int("ssid ", blk_schid.ssid);
+ found = find_dev(&schib, dev_no);
+ } else {
+ for (ssid = 0; ssid < 0x3; ssid++) {
+ blk_schid.ssid = ssid;
+ found = find_dev(&schib, -1);
+ if (found) {
+ break;
}
}
}
- if (!found) {
- virtio_panic("No virtio-blk device found!\n");
- }
+ IPL_assert(found, "No virtio device found");
- virtio_setup_block(blk_schid);
+ virtio_setup_device(blk_schid);
- if (!virtio_ipl_disk_is_valid()) {
- virtio_panic("No valid hard disk detected.\n");
- }
+ IPL_assert(virtio_ipl_disk_is_valid(), "No valid IPL device detected");
}
int main(void)
@@ -95,6 +106,6 @@ int main(void)
zipl_load(); /* no return */
- virtio_panic("Failed to load OS from hard disk\n");
+ panic("Failed to load OS from hard disk\n");
return 0; /* make compiler happy */
}