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MIPS: Loongson: Add basic Loongson-3 CPU support

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Basic Loongson-3 CPU support include CPU probing and TLB/cache
initializing.

Signed-off-by: Huacai Chen <chenhc@lemote.com>
Signed-off-by: Hongliang Tao <taohl@lemote.com>
Signed-off-by: Hua Yan <yanh@lemote.com>
Tested-by: Alex Smith <alex.smith@imgtec.com>
Reviewed-by: Alex Smith <alex.smith@imgtec.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/6630
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Huacai Chen
2014-03-21 18:44:00 +08:00
committed by Ralf Baechle
parent 152ebb44ef
commit c579d310b9
5 changed files with 76 additions and 5 deletions
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12
arch/mips/kernel/cpu-probe.c
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@@ -735,16 +735,22 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c, unsigned int cpu)
c->tlbsize = 64;
break;
case PRID_IMP_LOONGSON_64: /* Loongson-2/3 */
c->cputype = CPU_LOONGSON2;
__cpu_name[cpu] = "ICT Loongson-2";
switch (c->processor_id & PRID_REV_MASK) {
case PRID_REV_LOONGSON2E:
c->cputype = CPU_LOONGSON2;
__cpu_name[cpu] = "ICT Loongson-2";
set_elf_platform(cpu, "loongson2e");
break;
case PRID_REV_LOONGSON2F:
c->cputype = CPU_LOONGSON2;
__cpu_name[cpu] = "ICT Loongson-2";
set_elf_platform(cpu, "loongson2f");
break;
case PRID_REV_LOONGSON3A:
c->cputype = CPU_LOONGSON3;
__cpu_name[cpu] = "ICT Loongson-3";
set_elf_platform(cpu, "loongson3a");
break;
}
set_isa(c, MIPS_CPU_ISA_III);