# HG changeset patch
# User djm@xxxxxxxxxxxxxxx
# Node ID 5e142e1f41e61f76b2d77947ca5d0a6aabf334b8
# Parent bd234c9603ce433dcb4a4ac1795a94f3b7b2796f
Support dom0_mem parameter at boot option (by Masaki Kanno)
Usage is the likely same as that of x86. ex. append="dom0_mem=768M ..."
(Also dom0_align parameter added by Dan Magenheimer)
Signed-off-by Masaki Kanno <kanno.masaki@xxxxxxxxxxxxxx>
Signed-off-by: Dan Magenheimer <dan.magenheimer@xxxxxx>
diff -r bd234c9603ce -r 5e142e1f41e6 xen/arch/ia64/xen/domain.c
--- a/xen/arch/ia64/xen/domain.c Fri Nov 11 19:23:04 2005
+++ b/xen/arch/ia64/xen/domain.c Mon Nov 14 17:41:41 2005
@@ -11,6 +11,7 @@
*/
#include <xen/config.h>
+#include <xen/init.h>
#include <xen/lib.h>
#include <xen/errno.h>
#include <xen/sched.h>
@@ -48,9 +49,8 @@
#define CONFIG_DOMAIN0_CONTIGUOUS
unsigned long dom0_start = -1L;
-unsigned long dom0_size = 512*1024*1024; //FIXME: Should be configurable
-//FIXME: alignment should be 256MB, lest Linux use a 256MB page size
-unsigned long dom0_align = 256*1024*1024;
+unsigned long dom0_size = 512*1024*1024;
+unsigned long dom0_align = 64*1024*1024;
#ifdef DOMU_BUILD_STAGING
unsigned long domU_staging_size = 32*1024*1024; //FIXME: Should be configurable
unsigned long domU_staging_start;
@@ -1154,3 +1154,54 @@
}
// FIXME SMP: Anything else needed here for SMP?
}
+
+// FIXME: It would be nice to print out a nice error message for bad
+// values of these boot-time parameters, but it seems we are too early
+// in the boot and attempts to print freeze the system?
+#define abort(x...) do {} while(0)
+#define warn(x...) do {} while(0)
+
+static void parse_dom0_mem(char *s)
+{
+ unsigned long bytes = parse_size_and_unit(s);
+
+ if (dom0_size < 4 * 1024 * 1024) {
+ abort("parse_dom0_mem: too small, boot aborted"
+ " (try e.g. dom0_mem=256M or dom0_mem=65536K)\n");
+ }
+ if (dom0_size % dom0_align) {
+ dom0_size = ((dom0_size / dom0_align) + 1) * dom0_align;
+ warn("parse_dom0_mem: dom0_size rounded up from"
+ " %lx to %lx bytes, due to dom0_align=%lx\n",
+ bytes,dom0_size,dom0_align);
+ }
+ else dom0_size = bytes;
+}
+custom_param("dom0_mem", parse_dom0_mem);
+
+
+static void parse_dom0_align(char *s)
+{
+ unsigned long bytes = parse_size_and_unit(s);
+
+ if ((bytes - 1) ^ bytes) { /* not a power of two */
+ abort("parse_dom0_align: dom0_align must be power of two, "
+ "boot aborted"
+ " (try e.g. dom0_align=256M or dom0_align=65536K)\n");
+ }
+ else if (bytes < PAGE_SIZE) {
+ abort("parse_dom0_align: dom0_align must be >= %ld, "
+ "boot aborted"
+ " (try e.g. dom0_align=256M or dom0_align=65536K)\n",
+ PAGE_SIZE);
+ }
+ else dom0_align = bytes;
+ if (dom0_size % dom0_align) {
+ dom0_size = (dom0_size / dom0_align + 1) * dom0_align;
+ warn("parse_dom0_align: dom0_size rounded up from"
+ " %ld to %ld bytes, due to dom0_align=%lx\n",
+ bytes,dom0_size,dom0_align);
+ }
+}
+custom_param("dom0_align", parse_dom0_align);
+
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