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MIPS: Loongson: Add basic Loongson-3 definition

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Loongson-3 is a multi-core MIPS family CPU, it support MIPS64R2 fully.
Loongson-3 has the same IMP field (0x6300) as Loongson-2.

Loongson-3 has a hardware-maintained cache, system software doesn't
need to maintain coherency.

Loongson-3A is the first revision of Loongson-3, and it is the quad-
core version of Loongson-2G. Loongson-3A has a simplified version named
Loongson-2Gq, the main difference between Loongson-3A/2Gq is 3A has two
HyperTransport controller but 2Gq has only one. HT0 is used for cross-
chip interconnection and HT1 is used to link PCI bus. Therefore, 2Gq
cannot support NUMA but 3A can. For software, Loongson-2Gq is simply
identified as Loongson-3A.

Exsisting Loongson family CPUs:
Loongson-1: Loongson-1A, Loongson-1B, they are 32-bit MIPS CPUs.
Loongson-2: Loongson-2E, Loongson-2F, Loongson-2G, they are 64-bit
            single-core MIPS CPUs.
Loongson-3: Loongson-3A(including so-called Loongson-2Gq), they are
            64-bit multi-core MIPS CPUs.

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/6629/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Huacai Chen 2014-03-21 18:43:59 +08:00 committed by Ralf Baechle
parent d6d3c9afaa
commit 152ebb44ef
4 changed files with 23 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/mips/include/asm/cpu.h
View File

@ -231,6 +231,7 @@
#define PRID_REV_LOONGSON1B 0x0020
#define PRID_REV_LOONGSON2E 0x0002
#define PRID_REV_LOONGSON2F 0x0003
#define PRID_REV_LOONGSON3A 0x0005
/*
* Older processors used to encode processor version and revision in two
@ -304,8 +305,8 @@ enum cpu_type_enum {
* MIPS64 class processors
*/
CPU_5KC, CPU_5KE, CPU_20KC, CPU_25KF, CPU_SB1, CPU_SB1A, CPU_LOONGSON2,
CPU_CAVIUM_OCTEON, CPU_CAVIUM_OCTEON_PLUS, CPU_CAVIUM_OCTEON2,
CPU_CAVIUM_OCTEON3, CPU_XLR, CPU_XLP,
CPU_LOONGSON3, CPU_CAVIUM_OCTEON, CPU_CAVIUM_OCTEON_PLUS,
CPU_CAVIUM_OCTEON2, CPU_CAVIUM_OCTEON3, CPU_XLR, CPU_XLP,
CPU_LAST
};

9
arch/mips/include/asm/mach-loongson/spaces.h Normal file
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@ -0,0 +1,9 @@
#ifndef __ASM_MACH_LOONGSON_SPACES_H_
#define __ASM_MACH_LOONGSON_SPACES_H_
#if defined(CONFIG_64BIT)
#define CAC_BASE _AC(0x9800000000000000, UL)
#endif /* CONFIG_64BIT */
#include <asm/mach-generic/spaces.h>
#endif

2
arch/mips/include/asm/module.h
View File

@ -126,6 +126,8 @@ search_module_dbetables(unsigned long addr)
#define MODULE_PROC_FAMILY "LOONGSON1 "
#elif defined CONFIG_CPU_LOONGSON2
#define MODULE_PROC_FAMILY "LOONGSON2 "
#elif defined CONFIG_CPU_LOONGSON3
#define MODULE_PROC_FAMILY "LOONGSON3 "
#elif defined CONFIG_CPU_CAVIUM_OCTEON
#define MODULE_PROC_FAMILY "OCTEON "
#elif defined CONFIG_CPU_XLR

9
arch/mips/include/asm/pgtable-bits.h
View File

@ -235,6 +235,15 @@ static inline uint64_t pte_to_entrylo(unsigned long pte_val)
#define _CACHE_CACHABLE_NONCOHERENT (5<<_CACHE_SHIFT)
#define _CACHE_UNCACHED_ACCELERATED (7<<_CACHE_SHIFT)
#elif defined(CONFIG_CPU_LOONGSON3)
/* Using COHERENT flag for NONCOHERENT doesn't hurt. */
#define _CACHE_UNCACHED (2<<_CACHE_SHIFT) /* LOONGSON */
#define _CACHE_CACHABLE_NONCOHERENT (3<<_CACHE_SHIFT) /* LOONGSON */
#define _CACHE_CACHABLE_COHERENT (3<<_CACHE_SHIFT) /* LOONGSON-3 */
#define _CACHE_UNCACHED_ACCELERATED (7<<_CACHE_SHIFT) /* LOONGSON */
#else
#define _CACHE_CACHABLE_NO_WA (0<<_CACHE_SHIFT) /* R4600 only */