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List:       xen-ppc-devel
Subject:    RE: [XenPPC] Changeset with 3 files on Friday (I think) has
From:       Hollis Blanchard <hollisb () us ! ibm ! com>
Date:       2007-01-22 22:15:59
Message-ID: 1169504160.24844.27.camel () basalt
[Download RAW message or body]

Hi Mark, you didn't mention this but I understand you are loading your
dom0 in an unusual way. Does this patch solve your problem?

diff -r ed5ee9dde0bd xen/arch/powerpc/boot_of.c
--- a/xen/arch/powerpc/boot_of.c	Sun Jan 21 08:17:46 2007 -0500
+++ b/xen/arch/powerpc/boot_of.c	Mon Jan 22 16:14:28 2007 -0600
@@ -488,6 +488,23 @@ static void boot_of_free(ulong addr, ulo
 }
 #endif
 
+static void boot_of_reserve(ulong addr, ulong size)
+{
+    ulong bits;
+    ulong pos;
+    ulong i;
+
+    size = ALIGN_UP(size, PAGE_SIZE);
+    bits = size >> PAGE_SHIFT;
+    pos = addr >> PAGE_SHIFT;
+
+    for (i = 0; i < bits; i++) {
+        if (test_bit(pos + i, mem_available_pages))
+            of_panic("%s: pg :0x%lx already reserved.\n", __func__, pos + i);
+        set_bit(pos + i, mem_available_pages);
+    }
+}
+
 static ulong boot_of_alloc(ulong size)
 {
     ulong bits;
@@ -1121,6 +1138,7 @@ static void * __init boot_of_module(ulon
         /* was it handed to us in registers ? */
         mod0_start = r3;
         mod0_size = r4;
+        boot_of_reserve(r3, r4);
             of_printf("%s: Dom0 was loaded and found using r3/r4:"
                       "0x%lx[size 0x%lx]\n",
                       __func__, mod0_start, mod0_size);


-- 
Hollis Blanchard
IBM Linux Technology Center

On Mon, 2007-01-22 at 15:31 -0500, Mark F Mergen wrote:
> 
> I cannot replicate Stuart's successful report.  I'm sure my simulator
> is a much older build than his and Hollis' guess about device trees is
> another reason I should bring my simulator up to date.  I apologize
> for raising a problem without doing that first.  I might not get to it
> right away, but I will do it.  Hollis, why don't you not waste your
> time with simulator until I test with a current one. 
> 
> Mark 
> 



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