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| author | Huacai Chen <chenhc@lemote.com> | 2014-06-26 07:41:28 +0400 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2014-07-30 23:46:19 +0400 |
| commit | c46173183657bbdbe0d54a981c28807581648422 (patch) | |
| tree | 554d75cfc577d82c043b3e2fca17819abd63033b /arch/mips/kernel | |
| parent | 140e39c1e3d29f50e161f55cca60f60b80408c2a (diff) | |
| download | linux-c46173183657bbdbe0d54a981c28807581648422.tar.xz | |
MIPS: Add NUMA support for Loongson-3
Multiple Loongson-3A chips can be interconnected with HT0-bus. This is
a CC-NUMA system that every chip (node) has its own local memory and
cache coherency is maintained by hardware. The 64-bit physical memory
address format is as follows:
0x-0000-YZZZ-ZZZZ-ZZZZ
The high 16 bits should be 0, which means the real physical address
supported by Loongson-3 is 48-bit. The "Y" bits is the base address of
each node, which can be also considered as the node-id. The "Z" bits is
the address offset within a node, which means every node has a 44 bits
address space.
Macros XPHYSADDR and MAX_PHYSMEM_BITS are modified unconditionally,
because many other MIPS CPUs have also extended their address spaces.
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Cc: John Crispin <john@phrozen.org>
Cc: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: linux-mips@linux-mips.org
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/7187/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel')
| -rw-r--r-- | arch/mips/kernel/setup.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c index 2f01201b158c..7c1fe2b42d40 100644 --- a/arch/mips/kernel/setup.c +++ b/arch/mips/kernel/setup.c @@ -282,7 +282,7 @@ static unsigned long __init init_initrd(void) * Initialize the bootmem allocator. It also setup initrd related data * if needed. */ -#ifdef CONFIG_SGI_IP27 +#if defined(CONFIG_SGI_IP27) || (defined(CONFIG_CPU_LOONGSON3) && defined(CONFIG_NUMA)) static void __init bootmem_init(void) { |