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Re: [Xen-devel] x86_64 platform : addresses type
| To: | PUCCETTI Armand <armand.puccetti@xxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] x86_64 platform : addresses type |
| From: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
| Date: | Tue, 4 Jul 2006 11:53:49 +0100 |
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| Delivery-date: | Tue, 04 Jul 2006 03:54:10 -0700 |
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However, on x86_64 using gcc, addresses as well as unsigned long are 64 bits long.It seems that luckily mmap_addr is below 2*32-1, making the u32 type acceptable so far (for instance in function __start_xen, where the memory map is turned intoanother structure) but what would it cost to change it into u64 ?After all, the multiboot specification (page 18) has 'unsigned long' instead of u32 here. That info will never be placed above 4GB, or the info would not be available to non-pae non-x86/64 OSes. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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