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/* SPDX-License-Identifier: GPL-2.0 */
/*
* cpu.h: Values of the PRId register used to match up
* various MIPS cpu types.
*
* Copyright (C) 1996 David S. Miller (davem@davemloft.net)
* Copyright (C) 2004, 2013 Maciej W. Rozycki
*/
#ifndef _ASM_CPU_H
#define _ASM_CPU_H
#include <linux/bits.h>
/*
As of the MIPS32 and MIPS64 specs from MTI, the PRId register (CP0
register 15, select 0) is defined in this (backwards compatible) way:
+----------------+----------------+----------------+----------------+
| Company Options| Company ID | Processor ID | Revision |
+----------------+----------------+----------------+----------------+
31 24 23 16 15 8 7
I don't have docs for all the previous processors, but my impression is
that bits 16-23 have been 0 for all MIPS processors before the MIPS32/64
spec.
*/
#define PRID_OPT_MASK 0xff000000
/*
* Assigned Company values for bits 23:16 of the PRId register.
*/
#define PRID_COMP_MASK 0xff0000
#define PRID_COMP_LEGACY 0x000000
#define PRID_COMP_MIPS 0x010000
#define PRID_COMP_BROADCOM 0x020000
#define PRID_COMP_ALCHEMY 0x030000
#define PRID_COMP_SIBYTE 0x040000
#define PRID_COMP_SANDCRAFT 0x050000
#define PRID_COMP_NXP 0x060000
#define PRID_COMP_TOSHIBA 0x070000
#define PRID_COMP_LSI 0x080000
#define PRID_COMP_LEXRA 0x0b0000
#define PRID_COMP_NETLOGIC 0x0c0000
#define PRID_COMP_CAVIUM 0x0d0000
#define PRID_COMP_LOONGSON 0x140000
#define PRID_COMP_INGENIC_13 0x130000 /* X2000, X2100 */
#define PRID_COMP_INGENIC_D0 0xd00000 /* JZ4730, JZ4740, JZ4750, JZ4755, JZ4760, X1830 */
#define PRID_COMP_INGENIC_D1 0xd10000 /* JZ4770, JZ4775, X1000 */
#define PRID_COMP_INGENIC_E1 0xe10000 /* JZ4780 */
/*
* Assigned Processor ID (implementation) values for bits 15:8 of the PRId
* register. In order to detect a certain CPU type exactly eventually
* additional registers may need to be examined.
*/
#define PRID_IMP_MASK 0xff00
/*
* These are valid when 23:16 == PRID_COMP_LEGACY
*/
#define PRID_IMP_R2000 0x0100
#define PRID_IMP_AU1_REV1 0x0100
#define PRID_IMP_AU1_REV2 0x0200
#define PRID_IMP_R3000 0x0200 /* Same as R2000A */
#define PRID_IMP_R6000 0x0300 /* Same as R3000A */
#define PRID_IMP_R4000 0x0400
#define PRID_IMP_R6000A 0x0600
#define PRID_IMP_R10000 0x0900
#define PRID_IMP_R4300 0x0b00
#define PRID_IMP_VR41XX 0x0c00
#define PRID_IMP_R12000 0x0e00
#define PRID_IMP_R14000 0x0f00 /* R14K && R16K */
#define PRID_IMP_R8000 0x1000
#define PRID_IMP_PR4450 0x1200
#define PRID_IMP_R4600 0x2000
#define PRID_IMP_R4700 0x2100
#define PRID_IMP_TX39 0x2200
#define PRID_IMP_R4640 0x2200
#define PRID_IMP_R4650 0x2200 /* Same as R4640 */
#define PRID_IMP_R5000 0x2300
#define PRID_IMP_TX49 0x2d00
#define PRID_IMP_SONIC 0x2400
#define PRID_IMP_MAGIC 0x2500
#define PRID_IMP_RM7000 0x2700
#define PRID_IMP_NEVADA 0x2800 /* RM5260 ??? */
#define PRID_IMP_RM9000 0x3400
#define PRID_IMP_LOONGSON_32 0x4200 /* Loongson-1 */
#define PRID_IMP_R5432 0x5400
#define PRID_IMP_R5500 0x5500
#define PRID_IMP_LOONGSON_64R 0x6100 /* Reduced Loongson-2 */
#define PRID_IMP_LOONGSON_64C 0x6300 /* Classic Loongson-2 and Loongson-3 */
#define PRID_IMP_LOONGSON_64G 0xc000 /* Generic Loongson-2 and Loongson-3 */
#define PRID_IMP_UNKNOWN 0xff00
/*
* These are the PRID's for when 23:16 == PRID_COMP_MIPS
*/
#define PRID_IMP_QEMU_GENERIC 0x0000
#define PRID_IMP_4KC 0x8000
#define PRID_IMP_5KC 0x8100
#define PRID_IMP_20KC 0x8200
#define PRID_IMP_4KEC 0x8400
#define PRID_IMP_4KSC 0x8600
#define PRID_IMP_25KF 0x8800
#define PRID_IMP_5KE 0x8900
#define PRID_IMP_4KECR2 0x9000
#define PRID_IMP_4KEMPR2 0x9100
#define PRID_IMP_4KSD 0x9200
#define PRID_IMP_24K 0x9300
#define PRID_IMP_34K 0x9500
#define PRID_IMP_24KE 0x9600
#define PRID_IMP_74K 0x9700
#define PRID_IMP_1004K 0x9900
#define PRID_IMP_1074K 0x9a00
#define PRID_IMP_M14KC 0x9c00
#define PRID_IMP_M14KEC 0x9e00
#define PRID_IMP_INTERAPTIV_UP 0xa000
#define PRID_IMP_INTERAPTIV_MP 0xa100
#define PRID_IMP_PROAPTIV_UP 0xa200
#define PRID_IMP_PROAPTIV_MP 0xa300
#define PRID_IMP_P6600 0xa400
#define PRID_IMP_M5150 0xa700
#define PRID_IMP_P5600 0xa800
#define PRID_IMP_I6400 0xa900
#define PRID_IMP_M6250 0xab00
#define PRID_IMP_I6500 0xb000
/*
* These are the PRID's for when 23:16 == PRID_COMP_SIBYTE
*/
#define PRID_IMP_SB1 0x0100
#define PRID_IMP_SB1A 0x1100
/*
* These are the PRID's for when 23:16 == PRID_COMP_SANDCRAFT
*/
#define PRID_IMP_SR71000 0x0400
/*
* These are the PRID's for when 23:16 == PRID_COMP_BROADCOM
*/
#define PRID_IMP_BMIPS32_REV4 0x4000
#define PRID_IMP_BMIPS32_REV8 0x8000
#define PRID_IMP_BMIPS3300 0x9000
#define PRID_IMP_BMIPS3300_ALT 0x9100
#define PRID_IMP_BMIPS3300_BUG 0x0000
#define PRID_IMP_BMIPS43XX 0xa000
#define PRID_IMP_BMIPS5000 0x5a00
#define PRID_IMP_BMIPS5200 0x5b00
#define PRID_REV_BMIPS4380_LO 0x0040
#define PRID_REV_BMIPS4380_HI 0x006f
/*
* These are the PRID's for when 23:16 == PRID_COMP_CAVIUM
*/
#define PRID_IMP_CAVIUM_CN38XX 0x0000
#define PRID_IMP_CAVIUM_CN31XX 0x0100
#define PRID_IMP_CAVIUM_CN30XX 0x0200
#define PRID_IMP_CAVIUM_CN58XX 0x0300
#define PRID_IMP_CAVIUM_CN56XX 0x0400
#define PRID_IMP_CAVIUM_CN50XX 0x0600
#define PRID_IMP_CAVIUM_CN52XX 0x0700
#define PRID_IMP_CAVIUM_CN63XX 0x9000
#define PRID_IMP_CAVIUM_CN68XX 0x9100
#define PRID_IMP_CAVIUM_CN66XX 0x9200
#define PRID_IMP_CAVIUM_CN61XX 0x9300
#define PRID_IMP_CAVIUM_CNF71XX 0x9400
#define PRID_IMP_CAVIUM_CN78XX 0x9500
#define PRID_IMP_CAVIUM_CN70XX 0x9600
#define PRID_IMP_CAVIUM_CN73XX 0x9700
#define PRID_IMP_CAVIUM_CNF75XX 0x9800
/*
* These are the PRID's for when 23:16 == PRID_COMP_INGENIC_*
*/
#define PRID_IMP_XBURST_REV1 0x0200 /* XBurst®1 with MXU1.0/MXU1.1 SIMD ISA */
#define PRID_IMP_XBURST_REV2 0x0100 /* XBurst®1 with MXU2.0 SIMD ISA */
#define PRID_IMP_XBURST2 0x2000 /* XBurst®2 with MXU2.1 SIMD ISA */
/*
* These are the PRID's for when 23:16 == PRID_COMP_NETLOGIC
*/
#define PRID_IMP_NETLOGIC_XLR732 0x0000
#define PRID_IMP_NETLOGIC_XLR716 0x0200
#define PRID_IMP_NETLOGIC_XLR532 0x0900
#define PRID_IMP_NETLOGIC_XLR308 0x0600
#define PRID_IMP_NETLOGIC_XLR532C 0x0800
#define PRID_IMP_NETLOGIC_XLR516C 0x0a00
#define PRID_IMP_NETLOGIC_XLR508C 0x0b00
#define PRID_IMP_NETLOGIC_XLR308C 0x0f00
#define PRID_IMP_NETLOGIC_XLS608 0x8000
#define PRID_IMP_NETLOGIC_XLS408 0x8800
#define PRID_IMP_NETLOGIC_XLS404 0x8c00
#define PRID_IMP_NETLOGIC_XLS208 0x8e00
#define PRID_IMP_NETLOGIC_XLS204 0x8f00
#define PRID_IMP_NETLOGIC_XLS108 0xce00
#define PRID_IMP_NETLOGIC_XLS104 0xcf00
#define PRID_IMP_NETLOGIC_XLS616B 0x4000
#define PRID_IMP_NETLOGIC_XLS608B 0x4a00
#define PRID_IMP_NETLOGIC_XLS416B 0x4400
#define PRID_IMP_NETLOGIC_XLS412B 0x4c00
#define PRID_IMP_NETLOGIC_XLS408B 0x4e00
#define PRID_IMP_NETLOGIC_XLS404B 0x4f00
#define PRID_IMP_NETLOGIC_AU13XX 0x8000
#define PRID_IMP_NETLOGIC_XLP8XX 0x1000
#define PRID_IMP_NETLOGIC_XLP3XX 0x1100
#define PRID_IMP_NETLOGIC_XLP2XX 0x1200
#define PRID_IMP_NETLOGIC_XLP9XX 0x1500
#define PRID_IMP_NETLOGIC_XLP5XX 0x1300
/*
* Particular Revision values for bits 7:0 of the PRId register.
*/
#define PRID_REV_MASK 0x00ff
/*
* Definitions for 7:0 on legacy processors
*/
#define PRID_REV_TX4927 0x0022
#define PRID_REV_TX4937 0x0030
#define PRID_REV_R4400 0x0040
#define PRID_REV_R3000A 0x0030
#define PRID_REV_R3000 0x0020
#define PRID_REV_R2000A 0x0010
#define PRID_REV_TX3912 0x0010
#define PRID_REV_TX3922 0x0030
#define PRID_REV_TX3927 0x0040
#define PRID_REV_VR4111 0x0050
#define PRID_REV_VR4181 0x0050 /* Same as VR4111 */
#define PRID_REV_VR4121 0x0060
#define PRID_REV_VR4122 0x0070
#define PRID_REV_VR4181A 0x0070 /* Same as VR4122 */
#define PRID_REV_VR4130 0x0080
#define PRID_REV_34K_V1_0_2 0x0022
#define PRID_REV_LOONGSON1B 0x0020
#define PRID_REV_LOONGSON1C 0x0020 /* Same as Loongson-1B */
#define PRID_REV_LOONGSON2E 0x0002
#define PRID_REV_LOONGSON2F 0x0003
#define PRID_REV_LOONGSON2K_R1_0 0x0000
#define PRID_REV_LOONGSON2K_R1_1 0x0001
#define PRID_REV_LOONGSON2K_R1_2 0x0002
#define PRID_REV_LOONGSON2K_R1_3 0x0003
#define PRID_REV_LOONGSON3A_R1 0x0005
#define PRID_REV_LOONGSON3B_R1 0x0006
#define PRID_REV_LOONGSON3B_R2 0x0007
#define PRID_REV_LOONGSON3A_R2_0 0x0008
#define PRID_REV_LOONGSON3A_R3_0 0x0009
#define PRID_REV_LOONGSON3A_R2_1 0x000c
#define PRID_REV_LOONGSON3A_R3_1 0x000d
/*
* Older processors used to encode processor version and revision in two
* 4-bit bitfields, the 4K seems to simply count up and even newer MTI cores
* have switched to use the 8-bits as 3:3:2 bitfield with the last field as
* the patch number. *ARGH*
*/
#define PRID_REV_ENCODE_44(ver, rev) \
((ver) << 4 | (rev))
#define PRID_REV_ENCODE_332(ver, rev, patch) \
((ver) << 5 | (rev) << 2 | (patch))
/*
* FPU implementation/revision register (CP1 control register 0).
*
* +---------------------------------+----------------+----------------+
* | 0 | Implementation | Revision |
* +---------------------------------+----------------+----------------+
* 31 16 15 8 7 0
*/
#define FPIR_IMP_MASK 0xff00
#define FPIR_IMP_NONE 0x0000
#if !defined(__ASSEMBLY__)
enum cpu_type_enum {
CPU_UNKNOWN,
/*
* R2000 class processors
*/
CPU_R2000, CPU_R3000, CPU_R3000A, CPU_R3041, CPU_R3051, CPU_R3052,
CPU_R3081, CPU_R3081E,
/*
* R4000 class processors
*/
CPU_R4000PC, CPU_R4000SC, CPU_R4000MC, CPU_R4200, CPU_R4300, CPU_R4310,
CPU_R4400PC, CPU_R4400SC, CPU_R4400MC, CPU_R4600, CPU_R4640, CPU_R4650,
CPU_R4700, CPU_R5000, CPU_R5500, CPU_NEVADA, CPU_R10000,
CPU_R12000, CPU_R14000, CPU_R16000, CPU_RM7000,
CPU_SR71000, CPU_TX49XX,
/*
* MIPS32 class processors
*/
CPU_4KC, CPU_4KEC, CPU_4KSC, CPU_24K, CPU_34K, CPU_1004K, CPU_74K,
CPU_ALCHEMY, CPU_PR4450, CPU_BMIPS32, CPU_BMIPS3300, CPU_BMIPS4350,
CPU_BMIPS4380, CPU_BMIPS5000, CPU_XBURST, CPU_LOONGSON32, CPU_M14KC,
CPU_M14KEC, CPU_INTERAPTIV, CPU_P5600, CPU_PROAPTIV, CPU_1074K,
CPU_M5150, CPU_I6400, CPU_P6600, CPU_M6250,
/*
* MIPS64 class processors
*/
CPU_5KC, CPU_5KE, CPU_20KC, CPU_25KF, CPU_SB1, CPU_SB1A, CPU_LOONGSON2EF,
CPU_LOONGSON64, CPU_CAVIUM_OCTEON, CPU_CAVIUM_OCTEON_PLUS,
CPU_CAVIUM_OCTEON2, CPU_CAVIUM_OCTEON3, CPU_I6500,
CPU_QEMU_GENERIC,
CPU_LAST
};
#endif /* !__ASSEMBLY */
/*
* ISA Level encodings
*
*/
#define MIPS_CPU_ISA_II 0x00000001
#define MIPS_CPU_ISA_III 0x00000002
#define MIPS_CPU_ISA_IV 0x00000004
#define MIPS_CPU_ISA_V 0x00000008
#define MIPS_CPU_ISA_M32R1 0x00000010
#define MIPS_CPU_ISA_M32R2 0x00000020
#define MIPS_CPU_ISA_M64R1 0x00000040
#define MIPS_CPU_ISA_M64R2 0x00000080
#define MIPS_CPU_ISA_M32R5 0x00000100
#define MIPS_CPU_ISA_M64R5 0x00000200
#define MIPS_CPU_ISA_M32R6 0x00000400
#define MIPS_CPU_ISA_M64R6 0x00000800
#define MIPS_CPU_ISA_32BIT (MIPS_CPU_ISA_II | MIPS_CPU_ISA_M32R1 | \
MIPS_CPU_ISA_M32R2 | MIPS_CPU_ISA_M32R5 | MIPS_CPU_ISA_M32R6)
#define MIPS_CPU_ISA_64BIT (MIPS_CPU_ISA_III | MIPS_CPU_ISA_IV | \
MIPS_CPU_ISA_V | MIPS_CPU_ISA_M64R1 | MIPS_CPU_ISA_M64R2 | \
MIPS_CPU_ISA_M64R5 | MIPS_CPU_ISA_M64R6)
/*
* CPU Option encodings
*/
#define MIPS_CPU_TLB BIT_ULL( 0) /* CPU has TLB */
#define MIPS_CPU_4KEX BIT_ULL( 1) /* "R4K" exception model */
#define MIPS_CPU_3K_CACHE BIT_ULL( 2) /* R3000-style caches */
#define MIPS_CPU_4K_CACHE BIT_ULL( 3) /* R4000-style caches */
#define MIPS_CPU_FPU BIT_ULL( 5) /* CPU has FPU */
#define MIPS_CPU_32FPR BIT_ULL( 6) /* 32 dbl. prec. FP registers */
#define MIPS_CPU_COUNTER BIT_ULL( 7) /* Cycle count/compare */
#define MIPS_CPU_WATCH BIT_ULL( 8) /* watchpoint registers */
#define MIPS_CPU_DIVEC BIT_ULL( 9) /* dedicated interrupt vector */
#define MIPS_CPU_VCE BIT_ULL(10) /* virt. coherence conflict possible */
#define MIPS_CPU_CACHE_CDEX_P BIT_ULL(11) /* Create_Dirty_Exclusive CACHE op */
#define MIPS_CPU_CACHE_CDEX_S BIT_ULL(12) /* ... same for seconary cache ... */
#define MIPS_CPU_MCHECK BIT_ULL(13) /* Machine check exception */
#define MIPS_CPU_EJTAG BIT_ULL(14) /* EJTAG exception */
#define MIPS_CPU_NOFPUEX BIT_ULL(15) /* no FPU exception */
#define MIPS_CPU_LLSC BIT_ULL(16) /* CPU has ll/sc instructions */
#define MIPS_CPU_INCLUSIVE_CACHES BIT_ULL(17) /* P-cache subset enforced */
#define MIPS_CPU_PREFETCH BIT_ULL(18) /* CPU has usable prefetch */
#define MIPS_CPU_VINT BIT_ULL(19) /* CPU supports MIPSR2 vectored interrupts */
#define MIPS_CPU_VEIC BIT_ULL(20) /* CPU supports MIPSR2 external interrupt controller mode */
#define MIPS_CPU_ULRI BIT_ULL(21) /* CPU has ULRI feature */
#define MIPS_CPU_PCI BIT_ULL(22) /* CPU has Perf Ctr Int indicator */
#define MIPS_CPU_RIXI BIT_ULL(23) /* CPU has TLB Read/eXec Inhibit */
#define MIPS_CPU_MICROMIPS BIT_ULL(24) /* CPU has microMIPS capability */
#define MIPS_CPU_TLBINV BIT_ULL(25) /* CPU supports TLBINV/F */
#define MIPS_CPU_SEGMENTS BIT_ULL(26) /* CPU supports Segmentation Control registers */
#define MIPS_CPU_EVA BIT_ULL(27) /* CPU supports Enhanced Virtual Addressing */
#define MIPS_CPU_HTW BIT_ULL(28) /* CPU support Hardware Page Table Walker */
#define MIPS_CPU_RIXIEX BIT_ULL(29) /* CPU has unique exception codes for {Read, Execute}-Inhibit exceptions */
#define MIPS_CPU_MAAR BIT_ULL(30) /* MAAR(I) registers are present */
#define MIPS_CPU_FRE BIT_ULL(31) /* FRE & UFE bits implemented */
#define MIPS_CPU_RW_LLB BIT_ULL(32) /* LLADDR/LLB writes are allowed */
#define MIPS_CPU_LPA BIT_ULL(33) /* CPU supports Large Physical Addressing */
#define MIPS_CPU_CDMM BIT_ULL(34) /* CPU has Common Device Memory Map */
#define MIPS_CPU_SP BIT_ULL(36) /* Small (1KB) page support */
#define MIPS_CPU_FTLB BIT_ULL(37) /* CPU has Fixed-page-size TLB */
#define MIPS_CPU_NAN_LEGACY BIT_ULL(38) /* Legacy NaN implemented */
#define MIPS_CPU_NAN_2008 BIT_ULL(39) /* 2008 NaN implemented */
#define MIPS_CPU_VP BIT_ULL(40) /* MIPSr6 Virtual Processors (multi-threading) */
#define MIPS_CPU_LDPTE BIT_ULL(41) /* CPU has ldpte/lddir instructions */
#define MIPS_CPU_MVH BIT_ULL(42) /* CPU supports MFHC0/MTHC0 */
#define MIPS_CPU_EBASE_WG BIT_ULL(43) /* CPU has EBase.WG */
#define MIPS_CPU_BADINSTR BIT_ULL(44) /* CPU has BadInstr register */
#define MIPS_CPU_BADINSTRP BIT_ULL(45) /* CPU has BadInstrP register */
#define MIPS_CPU_CTXTC BIT_ULL(46) /* CPU has [X]ConfigContext registers */
#define MIPS_CPU_PERF BIT_ULL(47) /* CPU has MIPS performance counters */
#define MIPS_CPU_GUESTCTL0EXT BIT_ULL(48) /* CPU has VZ GuestCtl0Ext register */
#define MIPS_CPU_GUESTCTL1 BIT_ULL(49) /* CPU has VZ GuestCtl1 register */
#define MIPS_CPU_GUESTCTL2 BIT_ULL(50) /* CPU has VZ GuestCtl2 register */
#define MIPS_CPU_GUESTID BIT_ULL(51) /* CPU uses VZ ASE GuestID feature */
#define MIPS_CPU_DRG BIT_ULL(52) /* CPU has VZ Direct Root to Guest (DRG) */
#define MIPS_CPU_UFR BIT_ULL(53) /* CPU supports User mode FR switching */
#define MIPS_CPU_SHARED_FTLB_RAM \
BIT_ULL(54) /* CPU shares FTLB RAM with another */
#define MIPS_CPU_SHARED_FTLB_ENTRIES \
BIT_ULL(55) /* CPU shares FTLB entries with another */
#define MIPS_CPU_MT_PER_TC_PERF_COUNTERS \
BIT_ULL(56) /* CPU has perf counters implemented per TC (MIPSMT ASE) */
#define MIPS_CPU_MMID BIT_ULL(57) /* CPU supports MemoryMapIDs */
#define MIPS_CPU_MM_SYSAD BIT_ULL(58) /* CPU supports write-through SysAD Valid merge */
#define MIPS_CPU_MM_FULL BIT_ULL(59) /* CPU supports write-through full merge */
#define MIPS_CPU_MAC_2008_ONLY BIT_ULL(60) /* CPU Only support MAC2008 Fused multiply-add instruction */
#define MIPS_CPU_FTLBPAREX BIT_ULL(61) /* CPU has FTLB parity exception */
#define MIPS_CPU_GSEXCEX BIT_ULL(62) /* CPU has GSExc exception */
/*
* CPU ASE encodings
*/
#define MIPS_ASE_MIPS16 0x00000001 /* code compression */
#define MIPS_ASE_MDMX 0x00000002 /* MIPS digital media extension */
#define MIPS_ASE_MIPS3D 0x00000004 /* MIPS-3D */
#define MIPS_ASE_SMARTMIPS 0x00000008 /* SmartMIPS */
#define MIPS_ASE_DSP 0x00000010 /* Signal Processing ASE */
#define MIPS_ASE_MIPSMT 0x00000020 /* CPU supports MIPS MT */
#define MIPS_ASE_DSP2P 0x00000040 /* Signal Processing ASE Rev 2 */
#define MIPS_ASE_VZ 0x00000080 /* Virtualization ASE */
#define MIPS_ASE_MSA 0x00000100 /* MIPS SIMD Architecture */
#define MIPS_ASE_DSP3 0x00000200 /* Signal Processing ASE Rev 3*/
#define MIPS_ASE_MIPS16E2 0x00000400 /* MIPS16e2 */
#define MIPS_ASE_LOONGSON_MMI 0x00000800 /* Loongson MultiMedia extensions Instructions */
#define MIPS_ASE_LOONGSON_CAM 0x00001000 /* Loongson CAM */
#define MIPS_ASE_LOONGSON_EXT 0x00002000 /* Loongson EXTensions */
#define MIPS_ASE_LOONGSON_EXT2 0x00004000 /* Loongson EXTensions R2 */
#endif /* _ASM_CPU_H */