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freebsd/sys/mips/include/cpuregs.h
Adrian Chadd 4cfbfdd4b3 Add "better" MIPS24k and MIPS74k barriers. 
* the mips74k cores only need EHB (which is 'sll $0, $0, 3')
  here; NOPs don't actually work.

* add EHB as the last NOP for the default barriers/hazards;
  that is "better" behaviour and should work on a wider
  variety of processors.

This allows the existing (icky) TLB code to work, allowing
the AR9344 SoC (mips74k) to actually get through kernel startup.

Tested:

* AR9344 SoC - (mips74k)
* AR9331 SoC - (mips24k)

TODO:

* test on mips4k CPUs, just to be sure.

* document that sll $0, $0, 3 is actually "EHB" and that it
  falls back to being a NOP for pre-mips32r1.

* mips24k has an errata that we currently don't correctly explicitly
  state - ie, that after DERET/ERET, the only valid instruction is
  a NOP.

Reviewed by:	imp@
Approved by:	re@ (gjb)
2013-10-09 00:27:12 +00:00

631 lines
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/* $NetBSD: cpuregs.h,v 1.70 2006/05/15 02:26:54 simonb Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ralph Campbell and Rick Macklem.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)machConst.h 8.1 (Berkeley) 6/10/93
*
* machConst.h --
*
* Machine dependent constants.
*
* Copyright (C) 1989 Digital Equipment Corporation.
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appears in all copies.
* Digital Equipment Corporation makes no representations about the
* suitability of this software for any purpose. It is provided "as is"
* without express or implied warranty.
*
* from: Header: /sprite/src/kernel/mach/ds3100.md/RCS/machConst.h,
* v 9.2 89/10/21 15:55:22 jhh Exp SPRITE (DECWRL)
* from: Header: /sprite/src/kernel/mach/ds3100.md/RCS/machAddrs.h,
* v 1.2 89/08/15 18:28:21 rab Exp SPRITE (DECWRL)
* from: Header: /sprite/src/kernel/vm/ds3100.md/RCS/vmPmaxConst.h,
* v 9.1 89/09/18 17:33:00 shirriff Exp SPRITE (DECWRL)
*
* $FreeBSD$
*/
#ifndef _MIPS_CPUREGS_H_
#define _MIPS_CPUREGS_H_
/*
* Address space.
* 32-bit mips CPUS partition their 32-bit address space into four segments:
*
* kuseg 0x00000000 - 0x7fffffff User virtual mem, mapped
* kseg0 0x80000000 - 0x9fffffff Physical memory, cached, unmapped
* kseg1 0xa0000000 - 0xbfffffff Physical memory, uncached, unmapped
* kseg2 0xc0000000 - 0xffffffff kernel-virtual, mapped
*
* Caching of mapped addresses is controlled by bits in the TLB entry.
*/
#define MIPS_KSEG0_LARGEST_PHYS (0x20000000)
#define MIPS_KSEG0_PHYS_MASK (0x1fffffff)
#define MIPS_XKPHYS_LARGEST_PHYS (0x10000000000) /* 40 bit PA */
#define MIPS_XKPHYS_PHYS_MASK (0x0ffffffffff)
#ifndef LOCORE
#define MIPS_KUSEG_START 0x00000000
#define MIPS_KSEG0_START ((intptr_t)(int32_t)0x80000000)
#define MIPS_KSEG0_END ((intptr_t)(int32_t)0x9fffffff)
#define MIPS_KSEG1_START ((intptr_t)(int32_t)0xa0000000)
#define MIPS_KSEG1_END ((intptr_t)(int32_t)0xbfffffff)
#define MIPS_KSSEG_START ((intptr_t)(int32_t)0xc0000000)
#define MIPS_KSSEG_END ((intptr_t)(int32_t)0xdfffffff)
#define MIPS_KSEG3_START ((intptr_t)(int32_t)0xe0000000)
#define MIPS_KSEG3_END ((intptr_t)(int32_t)0xffffffff)
#define MIPS_KSEG2_START MIPS_KSSEG_START
#define MIPS_KSEG2_END MIPS_KSSEG_END
#endif
#define MIPS_PHYS_TO_KSEG0(x) ((uintptr_t)(x) | MIPS_KSEG0_START)
#define MIPS_PHYS_TO_KSEG1(x) ((uintptr_t)(x) | MIPS_KSEG1_START)
#define MIPS_KSEG0_TO_PHYS(x) ((uintptr_t)(x) & MIPS_KSEG0_PHYS_MASK)
#define MIPS_KSEG1_TO_PHYS(x) ((uintptr_t)(x) & MIPS_KSEG0_PHYS_MASK)
#define MIPS_IS_KSEG0_ADDR(x) \
(((vm_offset_t)(x) >= MIPS_KSEG0_START) && \
((vm_offset_t)(x) <= MIPS_KSEG0_END))
#define MIPS_IS_KSEG1_ADDR(x) \
(((vm_offset_t)(x) >= MIPS_KSEG1_START) && \
((vm_offset_t)(x) <= MIPS_KSEG1_END))
#define MIPS_IS_VALID_PTR(x) (MIPS_IS_KSEG0_ADDR(x) || \
MIPS_IS_KSEG1_ADDR(x))
/*
* Cache Coherency Attributes:
* UC: Uncached.
* UA: Uncached accelerated.
* C: Cacheable, coherency unspecified.
* CNC: Cacheable non-coherent.
* CC: Cacheable coherent.
* CCE: Cacheable coherent, exclusive read.
* CCEW: Cacheable coherent, exclusive write.
* CCUOW: Cacheable coherent, update on write.
*
* Note that some bits vary in meaning across implementations (and that the
* listing here is no doubt incomplete) and that the optimal cached mode varies
* between implementations. 0x02 is required to be UC and 0x03 is required to
* be a least C.
*
* We define the following logical bits:
* UNCACHED:
* The optimal uncached mode for the target CPU type. This must
* be suitable for use in accessing memory-mapped devices.
* CACHED: The optional cached mode for the target CPU type.
*/
#define MIPS_CCA_UC 0x02 /* Uncached. */
#define MIPS_CCA_C 0x03 /* Cacheable, coherency unspecified. */
#if defined(CPU_R4000) || defined(CPU_R10000)
#define MIPS_CCA_CNC 0x03
#define MIPS_CCA_CCE 0x04
#define MIPS_CCA_CCEW 0x05
#ifdef CPU_R4000
#define MIPS_CCA_CCUOW 0x06
#endif
#ifdef CPU_R10000
#define MIPS_CCA_UA 0x07
#endif
#define MIPS_CCA_CACHED MIPS_CCA_CCEW
#endif /* defined(CPU_R4000) || defined(CPU_R10000) */
#if defined(CPU_SB1)
#define MIPS_CCA_CC 0x05 /* Cacheable Coherent. */
#endif
#if defined(CPU_MIPS74KC)
#define MIPS_CCA_UNCACHED 0x02
#define MIPS_CCA_CACHED 0x00
#endif
#ifndef MIPS_CCA_UNCACHED
#define MIPS_CCA_UNCACHED MIPS_CCA_UC
#endif
/*
* If we don't know which cached mode to use and there is a cache coherent
* mode, use it. If there is not a cache coherent mode, use the required
* cacheable mode.
*/
#ifndef MIPS_CCA_CACHED
#ifdef MIPS_CCA_CC
#define MIPS_CCA_CACHED MIPS_CCA_CC
#else
#define MIPS_CCA_CACHED MIPS_CCA_C
#endif
#endif
#define MIPS_PHYS_TO_XKPHYS(cca,x) \
((0x2ULL << 62) | ((unsigned long long)(cca) << 59) | (x))
#define MIPS_PHYS_TO_XKPHYS_CACHED(x) \
((0x2ULL << 62) | ((unsigned long long)(MIPS_CCA_CACHED) << 59) | (x))
#define MIPS_PHYS_TO_XKPHYS_UNCACHED(x) \
((0x2ULL << 62) | ((unsigned long long)(MIPS_CCA_UNCACHED) << 59) | (x))
#define MIPS_XKPHYS_TO_PHYS(x) ((uintptr_t)(x) & MIPS_XKPHYS_PHYS_MASK)
#define MIPS_XKPHYS_START 0x8000000000000000
#define MIPS_XKPHYS_END 0xbfffffffffffffff
#define MIPS_XUSEG_START 0x0000000000000000
#define MIPS_XUSEG_END 0x0000010000000000
#define MIPS_XKSEG_START 0xc000000000000000
#define MIPS_XKSEG_END 0xc00000ff80000000
#define MIPS_XKSEG_COMPAT32_START 0xffffffff80000000
#define MIPS_XKSEG_COMPAT32_END 0xffffffffffffffff
#define MIPS_XKSEG_TO_COMPAT32(va) ((va) & 0xffffffff)
#ifdef __mips_n64
#define MIPS_DIRECT_MAPPABLE(pa) 1
#define MIPS_PHYS_TO_DIRECT(pa) MIPS_PHYS_TO_XKPHYS_CACHED(pa)
#define MIPS_PHYS_TO_DIRECT_UNCACHED(pa) MIPS_PHYS_TO_XKPHYS_UNCACHED(pa)
#define MIPS_DIRECT_TO_PHYS(va) MIPS_XKPHYS_TO_PHYS(va)
#else
#define MIPS_DIRECT_MAPPABLE(pa) ((pa) < MIPS_KSEG0_LARGEST_PHYS)
#define MIPS_PHYS_TO_DIRECT(pa) MIPS_PHYS_TO_KSEG0(pa)
#define MIPS_PHYS_TO_DIRECT_UNCACHED(pa) MIPS_PHYS_TO_KSEG1(pa)
#define MIPS_DIRECT_TO_PHYS(va) MIPS_KSEG0_TO_PHYS(va)
#endif
/* CPU dependent mtc0 hazard hook */
#if defined(CPU_CNMIPS) || defined(CPU_RMI)
#define COP0_SYNC
#elif defined(CPU_NLM)
#define COP0_SYNC .word 0xc0 /* ehb */
#elif defined(CPU_SB1)
#define COP0_SYNC ssnop; ssnop; ssnop; ssnop; ssnop; ssnop; ssnop; ssnop; ssnop
#elif defined(CPU_MIPS74KC)
#define COP0_SYNC .word 0xc0 /* ehb */
#else
/*
* Pick a reasonable default based on the "typical" spacing described in the
* "CP0 Hazards" chapter of MIPS Architecture Book Vol III.
*/
#define COP0_SYNC ssnop; ssnop; ssnop; ssnop; .word 0xc0;
#endif
#define COP0_HAZARD_FPUENABLE nop; nop; nop; nop;
/*
* The bits in the cause register.
*
* Bits common to r3000 and r4000:
*
* MIPS_CR_BR_DELAY Exception happened in branch delay slot.
* MIPS_CR_COP_ERR Coprocessor error.
* MIPS_CR_IP Interrupt pending bits defined below.
* (same meaning as in CAUSE register).
* MIPS_CR_EXC_CODE The exception type (see exception codes below).
*
* Differences:
* r3k has 4 bits of execption type, r4k has 5 bits.
*/
#define MIPS_CR_BR_DELAY 0x80000000
#define MIPS_CR_COP_ERR 0x30000000
#define MIPS_CR_EXC_CODE 0x0000007C /* five bits */
#define MIPS_CR_IP 0x0000FF00
#define MIPS_CR_EXC_CODE_SHIFT 2
#define MIPS_CR_COP_ERR_SHIFT 28
/*
* The bits in the status register. All bits are active when set to 1.
*
* R3000 status register fields:
* MIPS_SR_COP_USABILITY Control the usability of the four coprocessors.
* MIPS_SR_TS TLB shutdown.
*
* MIPS_SR_INT_IE Master (current) interrupt enable bit.
*
* Differences:
* r3k has cache control is via frobbing SR register bits, whereas the
* r4k cache control is via explicit instructions.
* r3k has a 3-entry stack of kernel/user bits, whereas the
* r4k has kernel/supervisor/user.
*/
#define MIPS_SR_COP_USABILITY 0xf0000000
#define MIPS_SR_COP_0_BIT 0x10000000
#define MIPS_SR_COP_1_BIT 0x20000000
#define MIPS_SR_COP_2_BIT 0x40000000
/* r4k and r3k differences, see below */
#define MIPS_SR_MX 0x01000000 /* MIPS64 */
#define MIPS_SR_PX 0x00800000 /* MIPS64 */
#define MIPS_SR_BEV 0x00400000 /* Use boot exception vector */
#define MIPS_SR_TS 0x00200000
#define MIPS_SR_DE 0x00010000
#define MIPS_SR_INT_IE 0x00000001
/*#define MIPS_SR_MBZ 0x0f8000c0*/ /* Never used, true for r3k */
#define MIPS_SR_INT_MASK 0x0000ff00
/*
* R4000 status register bit definitons,
* where different from r2000/r3000.
*/
#define MIPS_SR_XX 0x80000000
#define MIPS_SR_RP 0x08000000
#define MIPS_SR_FR 0x04000000
#define MIPS_SR_RE 0x02000000
#define MIPS_SR_DIAG_DL 0x01000000 /* QED 52xx */
#define MIPS_SR_DIAG_IL 0x00800000 /* QED 52xx */
#define MIPS_SR_SR 0x00100000
#define MIPS_SR_NMI 0x00080000 /* MIPS32/64 */
#define MIPS_SR_DIAG_CH 0x00040000
#define MIPS_SR_DIAG_CE 0x00020000
#define MIPS_SR_DIAG_PE 0x00010000
#define MIPS_SR_EIE 0x00010000 /* TX79/R5900 */
#define MIPS_SR_KX 0x00000080
#define MIPS_SR_SX 0x00000040
#define MIPS_SR_UX 0x00000020
#define MIPS_SR_KSU_MASK 0x00000018
#define MIPS_SR_KSU_USER 0x00000010
#define MIPS_SR_KSU_SUPER 0x00000008
#define MIPS_SR_KSU_KERNEL 0x00000000
#define MIPS_SR_ERL 0x00000004
#define MIPS_SR_EXL 0x00000002
/*
* The interrupt masks.
* If a bit in the mask is 1 then the interrupt is enabled (or pending).
*/
#define MIPS_INT_MASK 0xff00
#define MIPS_INT_MASK_5 0x8000
#define MIPS_INT_MASK_4 0x4000
#define MIPS_INT_MASK_3 0x2000
#define MIPS_INT_MASK_2 0x1000
#define MIPS_INT_MASK_1 0x0800
#define MIPS_INT_MASK_0 0x0400
#define MIPS_HARD_INT_MASK 0xfc00
#define MIPS_SOFT_INT_MASK_1 0x0200
#define MIPS_SOFT_INT_MASK_0 0x0100
/*
* The bits in the MIPS3 config register.
*
* bit 0..5: R/W, Bit 6..31: R/O
*/
/* kseg0 coherency algorithm - see MIPS3_TLB_ATTR values */
#define MIPS_CONFIG_K0_MASK 0x00000007
/*
* R/W Update on Store Conditional
* 0: Store Conditional uses coherency algorithm specified by TLB
* 1: Store Conditional uses cacheable coherent update on write
*/
#define MIPS_CONFIG_CU 0x00000008
#define MIPS_CONFIG_DB 0x00000010 /* Primary D-cache line size */
#define MIPS_CONFIG_IB 0x00000020 /* Primary I-cache line size */
#define MIPS_CONFIG_CACHE_L1_LSIZE(config, bit) \
(((config) & (bit)) ? 32 : 16)
#define MIPS_CONFIG_DC_MASK 0x000001c0 /* Primary D-cache size */
#define MIPS_CONFIG_DC_SHIFT 6
#define MIPS_CONFIG_IC_MASK 0x00000e00 /* Primary I-cache size */
#define MIPS_CONFIG_IC_SHIFT 9
#define MIPS_CONFIG_C_DEFBASE 0x1000 /* default base 2^12 */
/* Cache size mode indication: available only on Vr41xx CPUs */
#define MIPS_CONFIG_CS 0x00001000
#define MIPS_CONFIG_C_4100BASE 0x0400 /* base is 2^10 if CS=1 */
#define MIPS_CONFIG_CACHE_SIZE(config, mask, base, shift) \
((base) << (((config) & (mask)) >> (shift)))
/* External cache enable: Controls L2 for R5000/Rm527x and L3 for Rm7000 */
#define MIPS_CONFIG_SE 0x00001000
/* Block ordering: 0: sequential, 1: sub-block */
#define MIPS_CONFIG_EB 0x00002000
/* ECC mode - 0: ECC mode, 1: parity mode */
#define MIPS_CONFIG_EM 0x00004000
/* BigEndianMem - 0: kernel and memory are little endian, 1: big endian */
#define MIPS_CONFIG_BE 0x00008000
/* Dirty Shared coherency state - 0: enabled, 1: disabled */
#define MIPS_CONFIG_SM 0x00010000
/* Secondary Cache - 0: present, 1: not present */
#define MIPS_CONFIG_SC 0x00020000
/* System Port width - 0: 64-bit, 1: 32-bit (QED RM523x), 2,3: reserved */
#define MIPS_CONFIG_EW_MASK 0x000c0000
#define MIPS_CONFIG_EW_SHIFT 18
/* Secondary Cache port width - 0: 128-bit data path to S-cache, 1: reserved */
#define MIPS_CONFIG_SW 0x00100000
/* Split Secondary Cache Mode - 0: I/D mixed, 1: I/D separated by SCAddr(17) */
#define MIPS_CONFIG_SS 0x00200000
/* Secondary Cache line size */
#define MIPS_CONFIG_SB_MASK 0x00c00000
#define MIPS_CONFIG_SB_SHIFT 22
#define MIPS_CONFIG_CACHE_L2_LSIZE(config) \
(0x10 << (((config) & MIPS_CONFIG_SB_MASK) >> MIPS_CONFIG_SB_SHIFT))
/* Write back data rate */
#define MIPS_CONFIG_EP_MASK 0x0f000000
#define MIPS_CONFIG_EP_SHIFT 24
/* System clock ratio - this value is CPU dependent */
#define MIPS_CONFIG_EC_MASK 0x70000000
#define MIPS_CONFIG_EC_SHIFT 28
/* Master-Checker Mode - 1: enabled */
#define MIPS_CONFIG_CM 0x80000000
/*
* The bits in the MIPS4 config register.
*/
/*
* Location of exception vectors.
*
* Common vectors: reset and UTLB miss.
*/
#define MIPS_RESET_EXC_VEC ((intptr_t)(int32_t)0xBFC00000)
#define MIPS_UTLB_MISS_EXC_VEC ((intptr_t)(int32_t)0x80000000)
/*
* MIPS-III exception vectors
*/
#define MIPS_XTLB_MISS_EXC_VEC ((intptr_t)(int32_t)0x80000080)
#define MIPS_CACHE_ERR_EXC_VEC ((intptr_t)(int32_t)0x80000100)
#define MIPS_GEN_EXC_VEC ((intptr_t)(int32_t)0x80000180)
/*
* MIPS32/MIPS64 (and some MIPS3) dedicated interrupt vector.
*/
#define MIPS_INTR_EXC_VEC 0x80000200
/*
* Coprocessor 0 registers:
*
* v--- width for mips I,III,32,64
* (3=32bit, 6=64bit, i=impl dep)
* 0 MIPS_COP_0_TLB_INDEX 3333 TLB Index.
* 1 MIPS_COP_0_TLB_RANDOM 3333 TLB Random.
* 2 MIPS_COP_0_TLB_LO0 .636 r4k TLB entry low.
* 3 MIPS_COP_0_TLB_LO1 .636 r4k TLB entry low, extended.
* 4 MIPS_COP_0_TLB_CONTEXT 3636 TLB Context.
* 5 MIPS_COP_0_TLB_PG_MASK .333 TLB Page Mask register.
* 6 MIPS_COP_0_TLB_WIRED .333 Wired TLB number.
* 7 MIPS_COP_0_INFO ..33 Info registers
* 8 MIPS_COP_0_BAD_VADDR 3636 Bad virtual address.
* 9 MIPS_COP_0_COUNT .333 Count register.
* 10 MIPS_COP_0_TLB_HI 3636 TLB entry high.
* 11 MIPS_COP_0_COMPARE .333 Compare (against Count).
* 12 MIPS_COP_0_STATUS 3333 Status register.
* 13 MIPS_COP_0_CAUSE 3333 Exception cause register.
* 14 MIPS_COP_0_EXC_PC 3636 Exception PC.
* 15 MIPS_COP_0_PRID 3333 Processor revision identifier.
* 16 MIPS_COP_0_CONFIG 3333 Configuration register.
* 16/1 MIPS_COP_0_CONFIG1 ..33 Configuration register 1.
* 16/2 MIPS_COP_0_CONFIG2 ..33 Configuration register 2.
* 16/3 MIPS_COP_0_CONFIG3 ..33 Configuration register 3.
* 16/4 MIPS_COP_0_CONFIG4 ..33 Configuration register 4.
* 17 MIPS_COP_0_LLADDR .336 Load Linked Address.
* 18 MIPS_COP_0_WATCH_LO .336 WatchLo register.
* 19 MIPS_COP_0_WATCH_HI .333 WatchHi register.
* 20 MIPS_COP_0_TLB_XCONTEXT .6.6 TLB XContext register.
* 23 MIPS_COP_0_DEBUG .... Debug JTAG register.
* 24 MIPS_COP_0_DEPC .... DEPC JTAG register.
* 25 MIPS_COP_0_PERFCNT ..36 Performance Counter register.
* 26 MIPS_COP_0_ECC .3ii ECC / Error Control register.
* 27 MIPS_COP_0_CACHE_ERR .3ii Cache Error register.
* 28/0 MIPS_COP_0_TAG_LO .3ii Cache TagLo register (instr).
* 28/1 MIPS_COP_0_DATA_LO ..ii Cache DataLo register (instr).
* 28/2 MIPS_COP_0_TAG_LO ..ii Cache TagLo register (data).
* 28/3 MIPS_COP_0_DATA_LO ..ii Cache DataLo register (data).
* 29/0 MIPS_COP_0_TAG_HI .3ii Cache TagHi register (instr).
* 29/1 MIPS_COP_0_DATA_HI ..ii Cache DataHi register (instr).
* 29/2 MIPS_COP_0_TAG_HI ..ii Cache TagHi register (data).
* 29/3 MIPS_COP_0_DATA_HI ..ii Cache DataHi register (data).
* 30 MIPS_COP_0_ERROR_PC .636 Error EPC register.
* 31 MIPS_COP_0_DESAVE .... DESAVE JTAG register.
*/
/* Deal with inclusion from an assembly file. */
#if defined(_LOCORE) || defined(LOCORE)
#define _(n) $n
#else
#define _(n) n
#endif
#define MIPS_COP_0_TLB_INDEX _(0)
#define MIPS_COP_0_TLB_RANDOM _(1)
/* Name and meaning of TLB bits for $2 differ on r3k and r4k. */
#define MIPS_COP_0_TLB_CONTEXT _(4)
/* $5 and $6 new with MIPS-III */
#define MIPS_COP_0_BAD_VADDR _(8)
#define MIPS_COP_0_TLB_HI _(10)
#define MIPS_COP_0_STATUS _(12)
#define MIPS_COP_0_CAUSE _(13)
#define MIPS_COP_0_EXC_PC _(14)
#define MIPS_COP_0_PRID _(15)
/* MIPS-III */
#define MIPS_COP_0_TLB_LO0 _(2)
#define MIPS_COP_0_TLB_LO1 _(3)
#define MIPS_COP_0_TLB_PG_MASK _(5)
#define MIPS_COP_0_TLB_WIRED _(6)
#define MIPS_COP_0_COUNT _(9)
#define MIPS_COP_0_COMPARE _(11)
#define MIPS_COP_0_CONFIG _(16)
#define MIPS_COP_0_LLADDR _(17)
#define MIPS_COP_0_WATCH_LO _(18)
#define MIPS_COP_0_WATCH_HI _(19)
#define MIPS_COP_0_TLB_XCONTEXT _(20)
#define MIPS_COP_0_ECC _(26)
#define MIPS_COP_0_CACHE_ERR _(27)
#define MIPS_COP_0_TAG_LO _(28)
#define MIPS_COP_0_TAG_HI _(29)
#define MIPS_COP_0_ERROR_PC _(30)
/* MIPS32/64 */
#define MIPS_COP_0_INFO _(7)
#define MIPS_COP_0_DEBUG _(23)
#define MIPS_COP_0_DEPC _(24)
#define MIPS_COP_0_PERFCNT _(25)
#define MIPS_COP_0_DATA_LO _(28)
#define MIPS_COP_0_DATA_HI _(29)
#define MIPS_COP_0_DESAVE _(31)
/* MIPS32 Config register definitions */
#define MIPS_MMU_NONE 0x00 /* No MMU present */
#define MIPS_MMU_TLB 0x01 /* Standard TLB */
#define MIPS_MMU_BAT 0x02 /* Standard BAT */
#define MIPS_MMU_FIXED 0x03 /* Standard fixed mapping */
#define MIPS_CONFIG0_MT_MASK 0x00000380 /* bits 9..7 MMU Type */
#define MIPS_CONFIG0_MT_SHIFT 7
#define MIPS_CONFIG0_BE 0x00008000 /* data is big-endian */
#define MIPS_CONFIG0_VI 0x00000004 /* instruction cache is virtual */
#define MIPS_CONFIG1_TLBSZ_MASK 0x7E000000 /* bits 30..25 # tlb entries minus one */
#define MIPS_CONFIG1_TLBSZ_SHIFT 25
#define MIPS_CONFIG1_IS_MASK 0x01C00000 /* bits 24..22 icache sets per way */
#define MIPS_CONFIG1_IS_SHIFT 22
#define MIPS_CONFIG1_IL_MASK 0x00380000 /* bits 21..19 icache line size */
#define MIPS_CONFIG1_IL_SHIFT 19
#define MIPS_CONFIG1_IA_MASK 0x00070000 /* bits 18..16 icache associativity */
#define MIPS_CONFIG1_IA_SHIFT 16
#define MIPS_CONFIG1_DS_MASK 0x0000E000 /* bits 15..13 dcache sets per way */
#define MIPS_CONFIG1_DS_SHIFT 13
#define MIPS_CONFIG1_DL_MASK 0x00001C00 /* bits 12..10 dcache line size */
#define MIPS_CONFIG1_DL_SHIFT 10
#define MIPS_CONFIG1_DA_MASK 0x00000380 /* bits 9.. 7 dcache associativity */
#define MIPS_CONFIG1_DA_SHIFT 7
#define MIPS_CONFIG1_LOWBITS 0x0000007F
#define MIPS_CONFIG1_C2 0x00000040 /* Coprocessor 2 implemented */
#define MIPS_CONFIG1_MD 0x00000020 /* MDMX ASE implemented (MIPS64) */
#define MIPS_CONFIG1_PC 0x00000010 /* Performance counters implemented */
#define MIPS_CONFIG1_WR 0x00000008 /* Watch registers implemented */
#define MIPS_CONFIG1_CA 0x00000004 /* MIPS16e ISA implemented */
#define MIPS_CONFIG1_EP 0x00000002 /* EJTAG implemented */
#define MIPS_CONFIG1_FP 0x00000001 /* FPU implemented */
#define MIPS_CONFIG4_MMUSIZEEXT 0x000000FF /* bits 7.. 0 MMU Size Extension */
#define MIPS_CONFIG4_MMUEXTDEF 0x0000C000 /* bits 15.14 MMU Extension Definition */
#define MIPS_CONFIG4_MMUEXTDEF_MMUSIZEEXT 0x00004000 /* This values denotes CONFIG4 bits */
/*
* Values for the code field in a break instruction.
*/
#define MIPS_BREAK_INSTR 0x0000000d
#define MIPS_BREAK_VAL_MASK 0x03ff0000
#define MIPS_BREAK_VAL_SHIFT 16
#define MIPS_BREAK_KDB_VAL 512
#define MIPS_BREAK_SSTEP_VAL 513
#define MIPS_BREAK_BRKPT_VAL 514
#define MIPS_BREAK_SOVER_VAL 515
#define MIPS_BREAK_DDB_VAL 516
#define MIPS_BREAK_KDB (MIPS_BREAK_INSTR | \
(MIPS_BREAK_KDB_VAL << MIPS_BREAK_VAL_SHIFT))
#define MIPS_BREAK_SSTEP (MIPS_BREAK_INSTR | \
(MIPS_BREAK_SSTEP_VAL << MIPS_BREAK_VAL_SHIFT))
#define MIPS_BREAK_BRKPT (MIPS_BREAK_INSTR | \
(MIPS_BREAK_BRKPT_VAL << MIPS_BREAK_VAL_SHIFT))
#define MIPS_BREAK_SOVER (MIPS_BREAK_INSTR | \
(MIPS_BREAK_SOVER_VAL << MIPS_BREAK_VAL_SHIFT))
#define MIPS_BREAK_DDB (MIPS_BREAK_INSTR | \
(MIPS_BREAK_DDB_VAL << MIPS_BREAK_VAL_SHIFT))
/*
* Mininum and maximum cache sizes.
*/
#define MIPS_MIN_CACHE_SIZE (16 * 1024)
#define MIPS_MAX_CACHE_SIZE (256 * 1024)
#define MIPS_MAX_PCACHE_SIZE (32 * 1024) /* max. primary cache size */
/*
* The floating point version and status registers.
*/
#define MIPS_FPU_ID $0
#define MIPS_FPU_CSR $31
/*
* The floating point coprocessor status register bits.
*/
#define MIPS_FPU_ROUNDING_BITS 0x00000003
#define MIPS_FPU_ROUND_RN 0x00000000
#define MIPS_FPU_ROUND_RZ 0x00000001
#define MIPS_FPU_ROUND_RP 0x00000002
#define MIPS_FPU_ROUND_RM 0x00000003
#define MIPS_FPU_STICKY_BITS 0x0000007c
#define MIPS_FPU_STICKY_INEXACT 0x00000004
#define MIPS_FPU_STICKY_UNDERFLOW 0x00000008
#define MIPS_FPU_STICKY_OVERFLOW 0x00000010
#define MIPS_FPU_STICKY_DIV0 0x00000020
#define MIPS_FPU_STICKY_INVALID 0x00000040
#define MIPS_FPU_ENABLE_BITS 0x00000f80
#define MIPS_FPU_ENABLE_INEXACT 0x00000080
#define MIPS_FPU_ENABLE_UNDERFLOW 0x00000100
#define MIPS_FPU_ENABLE_OVERFLOW 0x00000200
#define MIPS_FPU_ENABLE_DIV0 0x00000400
#define MIPS_FPU_ENABLE_INVALID 0x00000800
#define MIPS_FPU_EXCEPTION_BITS 0x0003f000
#define MIPS_FPU_EXCEPTION_INEXACT 0x00001000
#define MIPS_FPU_EXCEPTION_UNDERFLOW 0x00002000
#define MIPS_FPU_EXCEPTION_OVERFLOW 0x00004000
#define MIPS_FPU_EXCEPTION_DIV0 0x00008000
#define MIPS_FPU_EXCEPTION_INVALID 0x00010000
#define MIPS_FPU_EXCEPTION_UNIMPL 0x00020000
#define MIPS_FPU_COND_BIT 0x00800000
#define MIPS_FPU_FLUSH_BIT 0x01000000 /* r4k, MBZ on r3k */
#define MIPS_FPC_MBZ_BITS 0xfe7c0000
/*
* Constants to determine if have a floating point instruction.
*/
#define MIPS_OPCODE_SHIFT 26
#define MIPS_OPCODE_C1 0x11
#endif /* _MIPS_CPUREGS_H_ */
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