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Loongson 2F supports CPU clock scaling. When put it into wait mode by setting the frequency as ZERO it will stay in this mode until an external interrupt wakes the CPU again. To enable clock scaling support, an external timer of a known stable rate is required. Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> Cc: linux-mips@linux-mips.org Cc: cpufreq@vger.kernel.org, Cc: Dave Jones <davej@redhat.com>, Cc: Dominik Brodowski <linux@dominikbrodowski.net>, Cc: yanh@lemote.com Cc: huhb@lemote.com, Patchwork: http://patchwork.linux-mips.org/patch/660/ Patchwork: http://patchwork.linux-mips.org/patch/751/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
289 lines
8.9 KiB
C
289 lines
8.9 KiB
C
/*
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* cpu.h: Values of the PRId register used to match up
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* various MIPS cpu types.
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*
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* Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
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* Copyright (C) 2004 Maciej W. Rozycki
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*/
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#ifndef _ASM_CPU_H
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#define _ASM_CPU_H
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/* Assigned Company values for bits 23:16 of the PRId Register
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(CP0 register 15, select 0). As of the MIPS32 and MIPS64 specs from
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MTI, the PRId register is defined in this (backwards compatible)
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way:
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+----------------+----------------+----------------+----------------+
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| Company Options| Company ID | Processor ID | Revision |
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+----------------+----------------+----------------+----------------+
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31 24 23 16 15 8 7
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I don't have docs for all the previous processors, but my impression is
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that bits 16-23 have been 0 for all MIPS processors before the MIPS32/64
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spec.
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*/
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#define PRID_COMP_LEGACY 0x000000
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#define PRID_COMP_MIPS 0x010000
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#define PRID_COMP_BROADCOM 0x020000
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#define PRID_COMP_ALCHEMY 0x030000
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#define PRID_COMP_SIBYTE 0x040000
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#define PRID_COMP_SANDCRAFT 0x050000
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#define PRID_COMP_NXP 0x060000
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#define PRID_COMP_TOSHIBA 0x070000
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#define PRID_COMP_LSI 0x080000
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#define PRID_COMP_LEXRA 0x0b0000
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#define PRID_COMP_CAVIUM 0x0d0000
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/*
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* Assigned values for the product ID register. In order to detect a
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* certain CPU type exactly eventually additional registers may need to
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* be examined. These are valid when 23:16 == PRID_COMP_LEGACY
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*/
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#define PRID_IMP_R2000 0x0100
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#define PRID_IMP_AU1_REV1 0x0100
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#define PRID_IMP_AU1_REV2 0x0200
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#define PRID_IMP_R3000 0x0200 /* Same as R2000A */
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#define PRID_IMP_R6000 0x0300 /* Same as R3000A */
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#define PRID_IMP_R4000 0x0400
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#define PRID_IMP_R6000A 0x0600
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#define PRID_IMP_R10000 0x0900
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#define PRID_IMP_R4300 0x0b00
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#define PRID_IMP_VR41XX 0x0c00
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#define PRID_IMP_R12000 0x0e00
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#define PRID_IMP_R14000 0x0f00
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#define PRID_IMP_R8000 0x1000
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#define PRID_IMP_PR4450 0x1200
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#define PRID_IMP_R4600 0x2000
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#define PRID_IMP_R4700 0x2100
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#define PRID_IMP_TX39 0x2200
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#define PRID_IMP_R4640 0x2200
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#define PRID_IMP_R4650 0x2200 /* Same as R4640 */
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#define PRID_IMP_R5000 0x2300
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#define PRID_IMP_TX49 0x2d00
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#define PRID_IMP_SONIC 0x2400
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#define PRID_IMP_MAGIC 0x2500
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#define PRID_IMP_RM7000 0x2700
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#define PRID_IMP_NEVADA 0x2800 /* RM5260 ??? */
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#define PRID_IMP_RM9000 0x3400
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#define PRID_IMP_LOONGSON1 0x4200
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#define PRID_IMP_R5432 0x5400
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#define PRID_IMP_R5500 0x5500
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#define PRID_IMP_LOONGSON2 0x6300
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#define PRID_IMP_UNKNOWN 0xff00
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/*
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* These are the PRID's for when 23:16 == PRID_COMP_MIPS
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*/
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#define PRID_IMP_4KC 0x8000
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#define PRID_IMP_5KC 0x8100
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#define PRID_IMP_20KC 0x8200
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#define PRID_IMP_4KEC 0x8400
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#define PRID_IMP_4KSC 0x8600
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#define PRID_IMP_25KF 0x8800
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#define PRID_IMP_5KE 0x8900
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#define PRID_IMP_4KECR2 0x9000
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#define PRID_IMP_4KEMPR2 0x9100
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#define PRID_IMP_4KSD 0x9200
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#define PRID_IMP_24K 0x9300
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#define PRID_IMP_34K 0x9500
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#define PRID_IMP_24KE 0x9600
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#define PRID_IMP_74K 0x9700
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#define PRID_IMP_1004K 0x9900
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/*
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* These are the PRID's for when 23:16 == PRID_COMP_SIBYTE
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*/
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#define PRID_IMP_SB1 0x0100
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#define PRID_IMP_SB1A 0x1100
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/*
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* These are the PRID's for when 23:16 == PRID_COMP_SANDCRAFT
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*/
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#define PRID_IMP_SR71000 0x0400
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/*
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* These are the PRID's for when 23:16 == PRID_COMP_BROADCOM
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*/
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#define PRID_IMP_BCM4710 0x4000
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#define PRID_IMP_BCM3302 0x9000
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#define PRID_IMP_BCM6338 0x9000
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#define PRID_IMP_BCM6345 0x8000
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#define PRID_IMP_BCM6348 0x9100
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#define PRID_IMP_BCM4350 0xA000
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#define PRID_REV_BCM6358 0x0010
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#define PRID_REV_BCM6368 0x0030
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/*
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* These are the PRID's for when 23:16 == PRID_COMP_CAVIUM
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*/
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#define PRID_IMP_CAVIUM_CN38XX 0x0000
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#define PRID_IMP_CAVIUM_CN31XX 0x0100
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#define PRID_IMP_CAVIUM_CN30XX 0x0200
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#define PRID_IMP_CAVIUM_CN58XX 0x0300
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#define PRID_IMP_CAVIUM_CN56XX 0x0400
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#define PRID_IMP_CAVIUM_CN50XX 0x0600
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#define PRID_IMP_CAVIUM_CN52XX 0x0700
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/*
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* Definitions for 7:0 on legacy processors
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*/
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#define PRID_REV_MASK 0x00ff
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#define PRID_REV_TX4927 0x0022
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#define PRID_REV_TX4937 0x0030
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#define PRID_REV_R4400 0x0040
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#define PRID_REV_R3000A 0x0030
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#define PRID_REV_R3000 0x0020
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#define PRID_REV_R2000A 0x0010
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#define PRID_REV_TX3912 0x0010
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#define PRID_REV_TX3922 0x0030
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#define PRID_REV_TX3927 0x0040
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#define PRID_REV_VR4111 0x0050
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#define PRID_REV_VR4181 0x0050 /* Same as VR4111 */
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#define PRID_REV_VR4121 0x0060
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#define PRID_REV_VR4122 0x0070
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#define PRID_REV_VR4181A 0x0070 /* Same as VR4122 */
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#define PRID_REV_VR4130 0x0080
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#define PRID_REV_34K_V1_0_2 0x0022
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#define PRID_REV_LOONGSON2E 0x0002
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#define PRID_REV_LOONGSON2F 0x0003
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/*
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* Older processors used to encode processor version and revision in two
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* 4-bit bitfields, the 4K seems to simply count up and even newer MTI cores
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* have switched to use the 8-bits as 3:3:2 bitfield with the last field as
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* the patch number. *ARGH*
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*/
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#define PRID_REV_ENCODE_44(ver, rev) \
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((ver) << 4 | (rev))
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#define PRID_REV_ENCODE_332(ver, rev, patch) \
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((ver) << 5 | (rev) << 2 | (patch))
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/*
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* FPU implementation/revision register (CP1 control register 0).
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*
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* +---------------------------------+----------------+----------------+
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* | 0 | Implementation | Revision |
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* +---------------------------------+----------------+----------------+
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* 31 16 15 8 7 0
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*/
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#define FPIR_IMP_NONE 0x0000
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enum cpu_type_enum {
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CPU_UNKNOWN,
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/*
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* R2000 class processors
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*/
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CPU_R2000, CPU_R3000, CPU_R3000A, CPU_R3041, CPU_R3051, CPU_R3052,
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CPU_R3081, CPU_R3081E,
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/*
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* R6000 class processors
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*/
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CPU_R6000, CPU_R6000A,
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/*
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* R4000 class processors
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*/
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CPU_R4000PC, CPU_R4000SC, CPU_R4000MC, CPU_R4200, CPU_R4300, CPU_R4310,
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CPU_R4400PC, CPU_R4400SC, CPU_R4400MC, CPU_R4600, CPU_R4640, CPU_R4650,
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CPU_R4700, CPU_R5000, CPU_R5000A, CPU_R5500, CPU_NEVADA, CPU_R5432,
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CPU_R10000, CPU_R12000, CPU_R14000, CPU_VR41XX, CPU_VR4111, CPU_VR4121,
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CPU_VR4122, CPU_VR4131, CPU_VR4133, CPU_VR4181, CPU_VR4181A, CPU_RM7000,
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CPU_SR71000, CPU_RM9000, CPU_TX49XX,
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/*
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* R8000 class processors
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*/
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CPU_R8000,
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/*
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* TX3900 class processors
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*/
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CPU_TX3912, CPU_TX3922, CPU_TX3927,
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/*
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* MIPS32 class processors
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*/
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CPU_4KC, CPU_4KEC, CPU_4KSC, CPU_24K, CPU_34K, CPU_1004K, CPU_74K,
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CPU_ALCHEMY, CPU_PR4450, CPU_BCM3302, CPU_BCM4710,
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CPU_BCM6338, CPU_BCM6345, CPU_BCM6348, CPU_BCM6358,
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/*
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* MIPS64 class processors
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*/
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CPU_5KC, CPU_20KC, CPU_25KF, CPU_SB1, CPU_SB1A, CPU_LOONGSON2,
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CPU_CAVIUM_OCTEON,
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CPU_LAST
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};
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/*
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* ISA Level encodings
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*
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*/
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#define MIPS_CPU_ISA_I 0x00000001
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#define MIPS_CPU_ISA_II 0x00000002
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#define MIPS_CPU_ISA_III 0x00000004
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#define MIPS_CPU_ISA_IV 0x00000008
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#define MIPS_CPU_ISA_V 0x00000010
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#define MIPS_CPU_ISA_M32R1 0x00000020
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#define MIPS_CPU_ISA_M32R2 0x00000040
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#define MIPS_CPU_ISA_M64R1 0x00000080
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#define MIPS_CPU_ISA_M64R2 0x00000100
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#define MIPS_CPU_ISA_32BIT (MIPS_CPU_ISA_I | MIPS_CPU_ISA_II | \
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MIPS_CPU_ISA_M32R1 | MIPS_CPU_ISA_M32R2 )
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#define MIPS_CPU_ISA_64BIT (MIPS_CPU_ISA_III | MIPS_CPU_ISA_IV | \
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MIPS_CPU_ISA_V | MIPS_CPU_ISA_M64R1 | MIPS_CPU_ISA_M64R2)
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/*
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* CPU Option encodings
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*/
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#define MIPS_CPU_TLB 0x00000001 /* CPU has TLB */
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#define MIPS_CPU_4KEX 0x00000002 /* "R4K" exception model */
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#define MIPS_CPU_3K_CACHE 0x00000004 /* R3000-style caches */
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#define MIPS_CPU_4K_CACHE 0x00000008 /* R4000-style caches */
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#define MIPS_CPU_TX39_CACHE 0x00000010 /* TX3900-style caches */
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#define MIPS_CPU_FPU 0x00000020 /* CPU has FPU */
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#define MIPS_CPU_32FPR 0x00000040 /* 32 dbl. prec. FP registers */
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#define MIPS_CPU_COUNTER 0x00000080 /* Cycle count/compare */
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#define MIPS_CPU_WATCH 0x00000100 /* watchpoint registers */
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#define MIPS_CPU_DIVEC 0x00000200 /* dedicated interrupt vector */
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#define MIPS_CPU_VCE 0x00000400 /* virt. coherence conflict possible */
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#define MIPS_CPU_CACHE_CDEX_P 0x00000800 /* Create_Dirty_Exclusive CACHE op */
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#define MIPS_CPU_CACHE_CDEX_S 0x00001000 /* ... same for seconary cache ... */
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#define MIPS_CPU_MCHECK 0x00002000 /* Machine check exception */
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#define MIPS_CPU_EJTAG 0x00004000 /* EJTAG exception */
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#define MIPS_CPU_NOFPUEX 0x00008000 /* no FPU exception */
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#define MIPS_CPU_LLSC 0x00010000 /* CPU has ll/sc instructions */
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#define MIPS_CPU_INCLUSIVE_CACHES 0x00020000 /* P-cache subset enforced */
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#define MIPS_CPU_PREFETCH 0x00040000 /* CPU has usable prefetch */
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#define MIPS_CPU_VINT 0x00080000 /* CPU supports MIPSR2 vectored interrupts */
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#define MIPS_CPU_VEIC 0x00100000 /* CPU supports MIPSR2 external interrupt controller mode */
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#define MIPS_CPU_ULRI 0x00200000 /* CPU has ULRI feature */
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/*
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* CPU ASE encodings
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*/
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#define MIPS_ASE_MIPS16 0x00000001 /* code compression */
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#define MIPS_ASE_MDMX 0x00000002 /* MIPS digital media extension */
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#define MIPS_ASE_MIPS3D 0x00000004 /* MIPS-3D */
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#define MIPS_ASE_SMARTMIPS 0x00000008 /* SmartMIPS */
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#define MIPS_ASE_DSP 0x00000010 /* Signal Processing ASE */
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#define MIPS_ASE_MIPSMT 0x00000020 /* CPU supports MIPS MT */
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#endif /* _ASM_CPU_H */
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