MIPS: Loongson: Allow booting from any core

By offering Logical->Physical core id mapping, so as to reserve some
physical cores via mask. This allow booting from any core when core-0
has problems. Since the maximun cores supported by Loongson-3 is 16,
32-bit cpu_startup_core_id can be split to 16-bit cpu_startup_core_id
and 16-bit reserved_cores_mask for compatibility.

Signed-off-by: Huacai Chen <chenhc@lemote.com>
Cc: John Crispin <john@phrozen.org>
Cc: Steven J. Hill <Steven.Hill@imgtec.com>
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/8323/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/mips/loongson/common/env.c b/arch/mips/loongson/common/env.c
index f15228550a22..d8be5398105c 100644
--- a/arch/mips/loongson/common/env.c
+++ b/arch/mips/loongson/common/env.c
@@ -119,6 +119,8 @@ void __init prom_init_env(void)
         }
 
         loongson_sysconf.nr_cpus = ecpu->nr_cpus;
+        loongson_sysconf.boot_cpu_id = ecpu->cpu_startup_core_id;
+        loongson_sysconf.reserved_cpus_mask = ecpu->reserved_cores_mask;
         if (ecpu->nr_cpus > NR_CPUS || ecpu->nr_cpus == 0)
                 loongson_sysconf.nr_cpus = NR_CPUS;
         loongson_sysconf.nr_nodes = (loongson_sysconf.nr_cpus +