On Fri, 2005-04-08 at 15:32 +0200, Franck Bui-Huu wrote:
> As I described in my previous email, bootmem.c does improper
> pfn convertions into phys addr. This simple patch fixes that.
...
> - bdata->node_bootmem_map = phys_to_virt(mapstart << PAGE_SHIFT);
> - bdata->node_boot_start = (start << PAGE_SHIFT);
> + bdata->node_bootmem_map = phys_to_virt(pfn_to_phys(mapstart));
> + bdata->node_boot_start = pfn_to_phys(start);
The only arch with phys_to_pfn() defined is UML, so the patch simply
won't compile anything but UML on current kernels (unless I'm missing
something).
Could you try to give us a more complete description of your problem? I
know your memory doesn't start at 0x0, but what problems does that
cause? Does the mem_map[] allocation blow up, etc...
If it's just mem_map[], That calculation could be fixed pretty easily.
Something like
+#ifdef CONFIG_CRAZY_MIPS_FOO_MEM_MAP_START...
+extern unsigned long mem_map_start_pfn
+#else
+#define mem_map_start_pfn 0UL
+#endif
-#define pfn_to_page(pfn) (mem_map + (pfn))
+#define pfn_to_page(pfn) (mem_map + (pfn) - mem_map_start_pfn)
(those names are horrid, please improve them, if you plan to do this)
All of the zone (and allocator) calculations should be just fine,
because it already has a zone_start_pfn.
-- Dave
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