/* $NetBSD: cpuregs.h,v 1.14 1998/04/23 10:32:08 jonathan 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. 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) */ #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 * * mips1 physical memory is limited to 512Mbytes, which is * doubly mapped in kseg0 (cached) and kseg1 (uncached.) * Caching of mapped addresses is controlled by bits in the TLB entry. */ #define MIPS_KUSEG_START 0x0 #define MIPS_KSEG0_START 0x80000000 #define MIPS_KSEG1_START 0xa0000000 #define MIPS_KSEG2_START 0xc0000000 #define MIPS_MAX_MEM_ADDR 0xbe000000 #define MIPS_RESERVED_ADDR 0xbfc80000 #define MIPS_KSEG0_TO_PHYS(x) ((unsigned)(x) & 0x1fffffff) #define MIPS_PHYS_TO_KSEG0(x) ((unsigned)(x) | MIPS_KSEG0_START) #define MIPS_KSEG1_TO_PHYS(x) ((unsigned)(x) & 0x1fffffff) #define MIPS_PHYS_TO_KSEG1(x) ((unsigned)(x) | MIPS_KSEG1_START) /* Map virtual address to index in mips3 r4k virtually-indexed cache */ #define MIPS3_VA_TO_CINDEX(x) \ ((unsigned)(x) & 0xffffff | MIPS_KSEG0_START) /* * 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 MIPS1_CR_EXC_CODE 0x0000003C /* four bits */ #define MIPS3_CR_EXC_CODE 0x0000007C /* five bits */ #define MIPS_CR_IP 0x0000FF00 #define MIPS_CR_EXC_CODE_SHIFT 2 /* * The bits in the status register. All bits are active when set to 1. * * R3000 status register fields: * MIPS_SR_CO_USABILITY Control the usability of the four coprocessors. * MIPS_SR_BOOT_EXC_VEC Use alternate exception vectors. * MIPS_SR_TLB_SHUTDOWN TLB disabled. * * 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 /* r4k and r3k differences, see below */ #define MIPS_SR_BOOT_EXC_VEC 0x00400000 #define MIPS_SR_TLB_SHUTDOWN 0x00200000 /* r4k and r3k differences, see below */ #define MIPS_SR_INT_IE 0x00000001 /*#define MIPS_SR_MBZ 0x0f8000c0*/ /* Never used, true for r3k */ /*#define MIPS_SR_INT_MASK 0x0000ff00*/ #define MIPS_SR_INT_ENAB MIPS_SR_INT_IE /* backwards compatibility */ #define MIPS_SR_INT_ENA_CUR MIPS_SR_INT_IE /* backwards compatibility */ /* * The R2000/R3000-specific status register bit definitions. * all bits are active when set to 1. * * MIPS_SR_PARITY_ERR Parity error. * MIPS_SR_CACHE_MISS Most recent D-cache load resulted in a miss. * MIPS_SR_PARITY_ZERO Zero replaces outgoing parity bits. * MIPS_SR_SWAP_CACHES Swap I-cache and D-cache. * MIPS_SR_ISOL_CACHES Isolate D-cache from main memory. * Interrupt enable bits defined below. * MIPS_SR_KU_OLD Old kernel/user mode bit. 1 => user mode. * MIPS_SR_INT_ENA_OLD Old interrupt enable bit. * MIPS_SR_KU_PREV Previous kernel/user mode bit. 1 => user mode. * MIPS_SR_INT_ENA_PREV Previous interrupt enable bit. * MIPS_SR_KU_CUR Current kernel/user mode bit. 1 => user mode. */ #define MIPS1_PARITY_ERR 0x00100000 #define MIPS1_CACHE_MISS 0x00080000 #define MIPS1_PARITY_ZERO 0x00040000 #define MIPS1_SWAP_CACHES 0x00020000 #define MIPS1_ISOL_CACHES 0x00010000 #define MIPS1_SR_KU_OLD 0x00000020 /* 2nd stacked KU/IE*/ #define MIPS1_SR_INT_ENA_OLD 0x00000010 /* 2nd stacked KU/IE*/ #define MIPS1_SR_KU_PREV 0x00000008 /* 1st stacked KU/IE*/ #define MIPS1_SR_INT_ENA_PREV 0x00000004 /* 1st stacked KU/IE*/ #define MIPS1_SR_KU_CUR 0x00000002 /* current KU */ /* backwards compatibility */ #define MIPS_SR_PARITY_ERR MIPS1_PARITY_ERR #define MIPS_SR_CACHE_MISS MIPS1_CACHE_MISS #define MIPS_SR_PARITY_ZERO MIPS1_PARITY_ZERO #define MIPS_SR_SWAP_CACHES MIPS1_SWAP_CACHES #define MIPS_SR_ISOL_CACHES MIPS1_ISOL_CACHES #define MIPS_SR_KU_OLD MIPS1_SR_KU_OLD #define MIPS_SR_INT_ENA_OLD MIPS1_SR_INT_ENA_OLD #define MIPS_SR_KU_PREV MIPS1_SR_KU_PREV #define MIPS_SR_KU_CUR MIPS1_SR_KU_CUR #define MIPS_SR_INT_ENA_PREV MIPS1_SR_INT_ENA_PREV /* * R4000 status register bit definitons, * where different from r2000/r3000. */ #define MIPS3_SR_RP 0x08000000 #define MIPS3_SR_FR_32 0x04000000 #define MIPS3_SR_RE 0x02000000 #define MIPS3_SR_SOFT_RESET 0x00100000 #define MIPS3_SR_DIAG_CH 0x00040000 #define MIPS3_SR_DIAG_CE 0x00020000 #define MIPS3_SR_DIAG_PE 0x00010000 #define MIPS3_SR_KX 0x00000080 #define MIPS3_SR_SX 0x00000040 #define MIPS3_SR_UX 0x00000020 #define MIPS3_SR_KSU_MASK 0x00000018 #define MIPS3_SR_KSU_USER 0x00000010 #define MIPS3_SR_KSU_SUPER 0x00000008 #define MIPS3_SR_KSU_KERNEL 0x00000000 #define MIPS3_SR_ERL 0x00000004 #define MIPS3_SR_EXL 0x00000002 /* backwards compatibility with names used in Pica port */ #define MIPS_SR_RP MIPS3_SR_RP #define MIPS_SR_FR_32 MIPS3_SR_FR_32 #define MIPS_SR_RE MIPS3_SR_RE #define MIPS_SR_SOFT_RESET MIPS3_SR_SOFT_RESET #define MIPS_SR_DIAG_CH MIPS3_SR_DIAG_CH #define MIPS_SR_DIAG_CE MIPS3_SR_DIAG_CE #define MIPS_SR_DIAG_PE MIPS3_SR_DIAG_PE #define MIPS_SR_KX MIPS3_SR_KX #define MIPS_SR_SX MIPS3_SR_SX #define MIPS_SR_UX MIPS3_SR_UX #define MIPS_SR_KSU_MASK MIPS3_SR_KSU_MASK #define MIPS_SR_KSU_USER MIPS3_SR_KSU_USER #define MIPS_SR_KSU_SUPER MIPS3_SR_KSU_SUPER #define MIPS_SR_KSU_KERNEL MIPS3_SR_KSU_KERNEL #define MIPS_SR_ERL MIPS3_SR_ERL #define MIPS_SR_EXL MIPS3_SR_EXL /* * 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 /* * nesting interrupt masks. */ #define MIPS_INT_MASK_SPL_SOFT0 MIPS_SOFT_INT_MASK_0 #define MIPS_INT_MASK_SPL_SOFT1 (MIPS_SOFT_INT_MASK_1|MIPS_INT_MASK_SPL_SOFT0) #define MIPS_INT_MASK_SPL0 (MIPS_INT_MASK_0|MIPS_INT_MASK_SPL_SOFT1) #define MIPS_INT_MASK_SPL1 (MIPS_INT_MASK_1|MIPS_INT_MASK_SPL0) #define MIPS_INT_MASK_SPL2 (MIPS_INT_MASK_2|MIPS_INT_MASK_SPL1) #define MIPS_INT_MASK_SPL3 (MIPS_INT_MASK_3|MIPS_INT_MASK_SPL2) #define MIPS_INT_MASK_SPL4 (MIPS_INT_MASK_4|MIPS_INT_MASK_SPL3) #define MIPS_INT_MASK_SPL5 (MIPS_INT_MASK_5|MIPS_INT_MASK_SPL4) /* * mips3 CPUs have on-chip timer at INT_MASK_5. We don't support it yet. */ #define MIPS3_INT_MASK (MIPS_INT_MASK & ~MIPS_INT_MASK_5) #define MIPS3_HARD_INT_MASK (MIPS_HARD_INT_MASK & ~MIPS_INT_MASK_5) /* * The bits in the context register. */ #define MIPS1_CNTXT_PTE_BASE 0xFFE00000 #define MIPS1_CNTXT_BAD_VPN 0x001FFFFC #define MIPS3_CNTXT_PTE_BASE 0xFF800000 #define MIPS3_CNTXT_BAD_VPN2 0x007FFFF0 /* * Location of exception vectors. * * Common vectors: reset and UTLB miss. */ #define MIPS_RESET_EXC_VEC 0xBFC00000 #define MIPS_UTLB_MISS_EXC_VEC 0x80000000 /* * R3000 general exception vector (everything else) */ #define MIPS1_GEN_EXC_VEC 0x80000080 /* * R4000 MIPS-III exception vectors */ #define MIPS3_XTLB_MISS_EXC_VEC 0x80000080 #define MIPS3_CACHE_ERR_EXC_VEC 0x80000100 #define MIPS3_GEN_EXC_VEC 0x80000180 /* * Coprocessor 0 registers: * * MIPS_COP_0_TLB_INDEX TLB index. * MIPS_COP_0_TLB_RANDOM TLB random. * MIPS_COP_0_TLB_LOW r3k TLB entry low. * MIPS_COP_0_TLB_LO0 r4k TLB entry low. * MIPS_COP_0_TLB_LO1 r4k TLB entry low, extended. * MIPS_COP_0_TLB_CONTEXT TLB context. * MIPS_COP_0_BAD_VADDR Bad virtual address. * MIPS_COP_0_TLB_HI TLB entry high. * MIPS_COP_0_STATUS_REG Status register. * MIPS_COP_0_CAUSE_REG Exception cause register. * MIPS_COP_0_EXC_PC Exception PC. * MIPS_COP_0_PRID Processor revision identifier. */ #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_REG $12 #define MIPS_COP_0_CAUSE_REG $13 #define MIPS_COP_0_EXC_PC $14 #define MIPS_COP_0_PRID $15 /* r3k-specific */ #define MIPS_COP_0_TLB_LOW $2 /* MIPS-III additions */ #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 /* * 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_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)) /* * Mininum and maximum cache sizes. */ #define MIPS_MIN_CACHE_SIZE (16 * 1024) #define MIPS_MAX_CACHE_SIZE (256 * 1024) /* * 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 MIPS1_FPC_MBZ_BITS 0xff7c0000 #define MIPS3_FPC_MBZ_BITS 0xfe7c0000 /* * Constants to determine if have a floating point instruction. */ #define MIPS_OPCODE_SHIFT 26 #define MIPS_OPCODE_C1 0x11 /* * The low part of the TLB entry. */ #define MIPS1_TLB_PHYS_PAGE_SHIFT 12 #define MIPS1_TLB_PF_NUM 0xfffff000 #define MIPS1_TLB_NON_CACHEABLE_BIT 0x00000800 #define MIPS1_TLB_MOD_BIT 0x00000400 #define MIPS1_TLB_VALID_BIT 0x00000200 #define MIPS1_TLB_GLOBAL_BIT 0x00000100 #define MIPS3_TLB_PHYS_PAGE_SHIFT 6 #define MIPS3_TLB_PF_NUM 0x3fffffc0 #define MIPS3_TLB_ATTR_MASK 0x00000038 #define MIPS3_TLB_MOD_BIT 0x00000004 #define MIPS3_TLB_VALID_BIT 0x00000002 #define MIPS3_TLB_GLOBAL_BIT 0x00000001 /* * The high part of the TLB entry. */ #define MIPS_TLB_VIRT_PAGE_SHIFT 12 #define MIPS1_TLB_VIRT_PAGE_NUM 0xfffff000 #define MIPS1_TLB_PID 0x00000fc0 #define MIPS1_TLB_PID_SHIFT 6 #define MIPS3_TLB_VIRT_PAGE_NUM 0xffffe000 #define MIPS3_TLB_PID 0x000000ff #define MIPS3_TLB_PID_SHIFT 0 /* * r3000: shift count to put the index in the right spot. * (zero on r4000?) */ #define MIPS1_TLB_INDEX_SHIFT 8 /* * The number of TLB entries and the first one that write random hits. */ #define MIPS1_TLB_NUM_TLB_ENTRIES 64 #define MIPS1_TLB_FIRST_RAND_ENTRY 8 #define MIPS3_TLB_NUM_TLB_ENTRIES 48 #define MIPS3_TLB_WIRED_ENTRIES 8 /* * The number of process id entries. */ #define MIPS1_TLB_NUM_PIDS 64 #define MIPS3_TLB_NUM_PIDS 256 /* * backwards compatibility with existing locore and compile-time * mips1/mips3 binding. * * XXX INT_MASK and HARD_INT_MASK are here only because we dont * support the mips3 on-chip timer which is tied to INT_5. */ #if defined(MIPS3) && !defined(MIPS1) #define MIPS_TLB_PID_SHIFT MIPS3_TLB_PID_SHIFT #define MIPS_TLB_NUM_PIDS MIPS3_TLB_NUM_PIDS #endif #if !defined(MIPS3) && defined(MIPS1) #define MIPS_TLB_PID_SHIFT MIPS1_TLB_PID_SHIFT #define MIPS_TLB_NUM_PIDS MIPS1_TLB_NUM_PIDS #endif #if defined(MIPS1) && defined(MIPS3) #define MIPS_TLB_PID_SHIFT \ ((CPUISMIPS3)? MIPS3_TLB_PID_SHIFT : MIPS1_TLB_PID_SHIFT) #define MIPS_TLB_NUM_PIDS \ ((CPUISMIPS3)? MIPS3_TLB_NUM_PIDS : MIPS1_TLB_NUM_PIDS) #endif /* * TLB probe return codes. */ #define MIPS_TLB_NOT_FOUND 0 #define MIPS_TLB_FOUND 1 #define MIPS_TLB_FOUND_WITH_PATCH 2 #define MIPS_TLB_PROBE_ERROR 3 #endif /* _MIPS_CPUREGS_H_ */