This patch adds support to linux:xen_init_early() to create a
start_info_t structure from properties in /xen/start_info_t if the
device tree does not have a pointer (/xen/start-info) to a previously
constructed start_info_t in memory.
--
Ryan Harper
Software Engineer; Linux Technology Center
IBM Corp., Austin, Tx
(512) 838-9253 T/L: 678-9253
ryanh@xxxxxxxxxx
diffstat output:
setup.c | 27 +++++++++++++++++++++++----
1 files changed, 23 insertions(+), 4 deletions(-)
Signed-off-by: Ryan Harper <ryanh@xxxxxxxxxx>
---
diff -r ab3b5849331d arch/powerpc/platforms/xen/setup.c
--- a/arch/powerpc/platforms/xen/setup.c Sun Jan 21 08:36:53 2007 -0500
+++ b/arch/powerpc/platforms/xen/setup.c Tue Jan 23 15:39:54 2007 -0600
@@ -32,6 +32,7 @@ EXPORT_SYMBOL(HYPERVISOR_shared_info);
EXPORT_SYMBOL(HYPERVISOR_shared_info);
/* Raw start-of-day parameters from the hypervisor. */
+start_info_t xsi;
start_info_t *xen_start_info;
extern struct machdep_calls mach_maple_md;
@@ -87,14 +88,32 @@ static void __init xen_init_early(void)
static void __init xen_init_early(void)
{
struct device_node *xen;
- u64 *si;
+ u64 *start_info;
DBG(" -> %s\n", __func__);
xen = of_find_node_by_path("/xen");
-
- si = (u64 *)get_property(xen, "start-info", NULL);
- xen_start_info = (start_info_t *)__va(*si);
+ start_info = (u64 *)get_property(xen, "start-info", NULL);
+
+ /* if we failed to get start-info property, then use start_info_t */
+ if (start_info != NULL ) {
+ xen_start_info = (start_info_t *)__va(*start_info);
+ } else {
+ struct device_node *si;
+ si = of_find_node_by_path("/xen/start_info_t");
+ xen_start_info = &xsi;
+ /* fill out start_info_t from devtree */
+ strcpy(xen_start_info->magic, get_property(si, "magic", NULL));
+ xen_start_info->nr_pages = *((u64 *)get_property(si,
"nr_pages", NULL));
+ xen_start_info->shared_info = *((u64 *)get_property(si,
"shared_info", NULL));
+ xen_start_info->store_mfn = *((u64 *)get_property(si,
"store_mfn", NULL));
+ xen_start_info->store_evtchn = *((u32 *)get_property(si,
"store_evtchn", NULL));
+ xen_start_info->console.domU.mfn = *((u64 *)get_property(si,
+ "console_domU_mfn", NULL));
+ xen_start_info->console.domU.evtchn = *((u32 *)get_property(si,
+ "console_domU_evtchn", NULL));
+ }
+
HYPERVISOR_shared_info = __va(xen_start_info->shared_info);
udbg_init_xen();
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