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From: Aurelien Jarno <aurelien@aurel32.net>
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Date: Fri, 26 Dec 2008 23:05:24 +0000
Subject: [Qemu-devel] [6133] target-ppc: workaround OpenBIOS limitation
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Revision: 6133
          http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=6133
Author:   aurel32
Date:     2008-12-26 23:05:23 +0000 (Fri, 26 Dec 2008)

Log Message:
-----------
target-ppc: workaround OpenBIOS limitation

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

Modified Paths:
--------------
    trunk/hw/mac_nvram.c

Modified: trunk/hw/mac_nvram.c
===================================================================
--- trunk/hw/mac_nvram.c	2008-12-26 23:05:15 UTC (rev 6132)
+++ trunk/hw/mac_nvram.c	2008-12-26 23:05:23 UTC (rev 6133)
@@ -43,6 +43,8 @@
     uint8_t *data;
 };
 
+#define DEF_SYSTEM_SIZE 0xc10
+
 /* Direct access to NVRAM */
 uint32_t macio_nvram_read (void *opaque, uint32_t addr)
 {
@@ -151,6 +153,10 @@
     nvr->data[end++] = '\0';
 
     end = start + ((end - start + 15) & ~15);
+    /* XXX: OpenBIOS is not able to grow up a partition. Leave some space for
+       new variables. */
+    if (end < DEF_SYSTEM_SIZE)
+        end = DEF_SYSTEM_SIZE;
     OpenBIOS_finish_partition(part_header, end - start);
 
     // free partition