Thomas Bogendoerfer bd848d1b92
MIPS: init: Prevent adding memory before PHYS_OFFSET
On some SGI machines (IP28 and IP30) a small region of memory is mirrored
to pyhsical address 0 for exception vectors while rest of the memory
is reachable at a higher physical address. ARC PROM marks this
region as reserved, but with commit a94e4f24ec83 ("MIPS: init: Drop
boot_mem_map") this chunk is used, when searching for start of ram,
which breaks at least IP28 and IP30 machines. To fix this
add_region_memory() checks for start address < PHYS_OFFSET and ignores
these chunks.

Fixes: a94e4f24ec83 ("MIPS: init: Drop boot_mem_map")
Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
2019-10-02 14:11:30 -07:00
..
2019-10-02 14:06:41 -07:00
2019-08-06 14:01:08 -07:00
2018-10-31 08:54:16 -07:00
2019-07-23 14:33:23 -07:00
2019-08-26 11:42:40 +01:00
2019-05-07 19:06:04 -07:00
2018-08-31 11:49:20 -07:00
2019-10-02 14:06:41 -07:00
2019-07-25 21:45:05 -07:00
2018-10-31 08:54:16 -07:00
2018-12-03 13:42:38 -08:00