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/* |
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* Copyright (C) 2003-2005 Anders Gavare. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* |
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* $Id: cpu_mips_coproc.c,v 1.11 2005/03/15 06:52:14 debug Exp $ |
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* |
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* Emulation of MIPS coprocessors. |
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*/ |
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|
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <math.h> |
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|
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#include "bintrans.h" |
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#include "cop0.h" |
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#include "cpu.h" |
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#include "cpu_mips.h" |
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#include "emul.h" |
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#include "machine.h" |
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#include "memory.h" |
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#include "mips_cpu_types.h" |
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#include "misc.h" |
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#include "opcodes_mips.h" |
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|
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|
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#ifndef ENABLE_MIPS |
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|
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|
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struct mips_coproc *mips_coproc_new(struct cpu *cpu, int coproc_nr) |
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{ return NULL; } |
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|
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void mips_coproc_tlb_set_entry(struct cpu *cpu, int entrynr, int size, |
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uint64_t vaddr, uint64_t paddr0, uint64_t paddr1, |
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int valid0, int valid1, int dirty0, int dirty1, int global, int asid, |
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int cachealgo0, int cachealgo1) { } |
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|
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|
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#else /* ENABLE_MIPS */ |
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|
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|
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extern volatile int single_step; |
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|
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static char *cop0_names[] = COP0_NAMES; |
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static char *regnames[] = MIPS_REGISTER_NAMES; |
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|
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|
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/* FPU control registers: */ |
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#define FPU_FCIR 0 |
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#define FPU_FCCR 25 |
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#define FPU_FCSR 31 |
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#define FCSR_FCC0_SHIFT 23 |
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#define FCSR_FCC1_SHIFT 25 |
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|
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|
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/* |
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* initialize_cop0_config(): |
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* |
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* Helper function, called from mips_coproc_new(). |
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*/ |
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static void initialize_cop0_config(struct cpu *cpu, struct mips_coproc *c) |
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{ |
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#ifdef ENABLE_MIPS16 |
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const int m16 = 1; |
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#else |
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const int m16 = 0; |
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#endif |
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int IB, DB, SB, IC, DC, SC; |
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|
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/* Default values: */ |
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c->reg[COP0_CONFIG] = |
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( 0 << 31) /* config1 present */ |
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| (0x00 << 16) /* implementation dependant */ |
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| ((cpu->byte_order==EMUL_BIG_ENDIAN? 1 : 0) << 15) |
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/* endian mode */ |
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| ( 2 << 13) /* 0 = MIPS32, |
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1 = MIPS64 with 32-bit segments, |
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2 = MIPS64 with all segments, |
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3 = reserved */ |
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| ( 0 << 10) /* architecture revision level, |
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0 = "Revision 1", other |
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values are reserved */ |
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| ( 1 << 7) /* MMU type: 0 = none, |
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1 = Standard TLB, |
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2 = Standard BAT, |
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3 = fixed mapping, 4-7=reserved */ |
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| ( 0 << 0) /* kseg0 coherency algorithm |
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(TODO) */ |
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; |
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|
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switch (cpu->cd.mips.cpu_type.rev) { |
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case MIPS_R4000: /* according to the R4000 manual */ |
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case MIPS_R4600: |
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IB = cpu->machine->cache_picache_linesize - 4; |
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IB = IB < 0? 0 : (IB > 1? 1 : IB); |
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DB = cpu->machine->cache_pdcache_linesize - 4; |
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DB = DB < 0? 0 : (DB > 1? 1 : DB); |
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SB = cpu->machine->cache_secondary_linesize - 4; |
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SB = SB < 0? 0 : (SB > 3? 3 : SB); |
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IC = cpu->machine->cache_picache - 12; |
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IC = IC < 0? 0 : (IC > 7? 7 : IC); |
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DC = cpu->machine->cache_pdcache - 12; |
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DC = DC < 0? 0 : (DC > 7? 7 : DC); |
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SC = cpu->machine->cache_secondary? 0 : 1; |
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c->reg[COP0_CONFIG] = |
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( 0 << 31) /* Master/Checker present bit */ |
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| (0x00 << 28) /* EC: system clock divisor, |
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0x00 = '2' */ |
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| (0x00 << 24) /* EP */ |
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| ( SB << 22) /* SB */ |
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| (0x00 << 21) /* SS: 0 = mixed i/d scache */ |
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| (0x00 << 20) /* SW */ |
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| (0x00 << 18) /* EW: 0=64-bit */ |
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| ( SC << 17) /* SC: 0=secondary cache present, |
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1=non-present */ |
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| (0x00 << 16) /* SM: (todo) */ |
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| ((cpu->byte_order==EMUL_BIG_ENDIAN? 1 : 0) << 15) |
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/* endian mode */ |
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| (0x01 << 14) /* ECC: 0=enabled, 1=disabled */ |
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| (0x00 << 13) /* EB: (todo) */ |
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| (0x00 << 12) /* 0 (resered) */ |
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| ( IC << 9) /* IC: I-cache = 2^(12+IC) bytes |
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(1 = 8KB, 4=64K) */ |
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| ( DC << 6) /* DC: D-cache = 2^(12+DC) bytes |
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(1 = 8KB, 4=64K) */ |
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| ( IB << 5) /* IB: I-cache line size (0=16, |
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1=32) */ |
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| ( DB << 4) /* DB: D-cache line size (0=16, |
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1=32) */ |
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| ( 0 << 3) /* CU: todo */ |
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| ( 0 << 0) /* kseg0 coherency algorithm |
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(TODO) */ |
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; |
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break; |
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case MIPS_R4100: /* According to the VR4131 manual: */ |
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IB = cpu->machine->cache_picache_linesize - 4; |
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IB = IB < 0? 0 : (IB > 1? 1 : IB); |
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DB = cpu->machine->cache_pdcache_linesize - 4; |
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DB = DB < 0? 0 : (DB > 1? 1 : DB); |
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IC = cpu->machine->cache_picache - 10; |
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IC = IC < 0? 0 : (IC > 7? 7 : IC); |
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DC = cpu->machine->cache_pdcache - 10; |
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DC = DC < 0? 0 : (DC > 7? 7 : DC); |
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c->reg[COP0_CONFIG] = |
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( 0 << 31) /* IS: Instruction Streaming bit */ |
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| (0x01 << 28) /* EC: system clock divisor, |
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0x01 = 2 */ |
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| (0x00 << 24) /* EP */ |
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| (0x00 << 23) /* AD: Accelerate data mode |
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(0=VR4000-compatible) */ |
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| ( m16 << 20) /* M16: MIPS16 support */ |
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| ( 1 << 17) /* '1' */ |
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| (0x00 << 16) /* BP: 'Branch forecast' |
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(0 = enabled) */ |
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| ((cpu->byte_order==EMUL_BIG_ENDIAN? 1 : 0) << 15) |
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/* endian mode */ |
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| ( 2 << 13) /* '2' hardcoded on VR4131 */ |
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| ( 1 << 12) /* CS: Cache size mode |
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(1 on VR4131) */ |
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| ( IC << 9) /* IC: I-cache = 2^(10+IC) bytes |
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(0 = 1KB, 4=16K) */ |
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| ( DC << 6) /* DC: D-cache = 2^(10+DC) bytes |
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(0 = 1KB, 4=16K) */ |
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| ( IB << 5) /* IB: I-cache line size (0=16, |
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1=32) */ |
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| ( DB << 4) /* DB: D-cache line size (0=16, |
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1=32) */ |
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| ( 0 << 0) /* kseg0 coherency algorithm (TODO) */ |
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; |
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break; |
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case MIPS_R5000: |
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case MIPS_RM5200: /* rm5200 is just a wild guess */ |
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/* These are just guesses: (the comments are wrong) */ |
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c->reg[COP0_CONFIG] = |
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( 0 << 31) /* Master/Checker present bit */ |
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| (0x00 << 28) /* EC: system clock divisor, |
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0x00 = '2' */ |
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| (0x00 << 24) /* EP */ |
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| (0x00 << 22) /* SB */ |
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| (0x00 << 21) /* SS */ |
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| (0x00 << 20) /* SW */ |
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| (0x00 << 18) /* EW: 0=64-bit */ |
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| (0x01 << 17) /* SC: 0=secondary cache present, |
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1=non-present */ |
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| (0x00 << 16) /* SM: (todo) */ |
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| ((cpu->byte_order==EMUL_BIG_ENDIAN? 1 : 0) << 15) |
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/* endian mode */ |
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| (0x01 << 14) /* ECC: 0=enabled, 1=disabled */ |
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| (0x00 << 13) /* EB: (todo) */ |
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| (0x00 << 12) /* 0 (resered) */ |
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| ( 3 << 9) /* IC: I-cache = 2^(12+IC) bytes |
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(1 = 8KB, 4=64K) */ |
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| ( 3 << 6) /* DC: D-cache = 2^(12+DC) bytes |
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(1 = 8KB, 4=64K) */ |
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| ( 1 << 5) /* IB: I-cache line size (0=16, |
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1=32) */ |
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| ( 1 << 4) /* DB: D-cache line size (0=16, |
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1=32) */ |
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| ( 0 << 3) /* CU: todo */ |
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| ( 2 << 0) /* kseg0 coherency algorithm |
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(TODO) */ |
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; |
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break; |
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case MIPS_R10000: |
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case MIPS_R12000: |
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case MIPS_R14000: |
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IC = cpu->machine->cache_picache - 12; |
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IC = IC < 0? 0 : (IC > 7? 7 : IC); |
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DC = cpu->machine->cache_pdcache - 12; |
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DC = DC < 0? 0 : (DC > 7? 7 : DC); |
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SC = cpu->machine->cache_secondary - 19; |
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SC = SC < 0? 0 : (SC > 7? 7 : SC); |
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/* According to the R10000 User's Manual: */ |
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c->reg[COP0_CONFIG] = |
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( IC << 29) /* Primary instruction cache size |
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(3 = 32KB) */ |
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| ( DC << 26) /* Primary data cache size (3 = |
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32KB) */ |
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| ( 0 << 19) /* SCClkDiv */ |
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| ( SC << 16) /* SCSize, secondary cache size. |
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0 = 512KB. powers of two */ |
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| ( 0 << 15) /* MemEnd */ |
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| ( 0 << 14) /* SCCorEn */ |
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| ( 1 << 13) /* SCBlkSize. 0=16 words, |
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1=32 words */ |
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| ( 0 << 9) /* SysClkDiv */ |
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| ( 0 << 7) /* PrcReqMax */ |
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| ( 0 << 6) /* PrcElmReq */ |
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| ( 0 << 5) /* CohPrcReqTar */ |
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| ( 0 << 3) /* Device number */ |
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| ( 2 << 0) /* Cache coherency algorithm for |
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kseg0 */ |
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; |
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break; |
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case MIPS_R5900: |
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/* |
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* R5900 is supposed to have the following (according |
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* to NetBSD/playstation2): |
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* cpu0: 16KB/64B 2-way set-associative L1 Instruction |
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* cache, 48 TLB entries |
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* cpu0: 8KB/64B 2-way set-associative write-back L1 |
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* Data cache |
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* The following settings are just guesses: |
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* (comments are incorrect) |
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*/ |
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c->reg[COP0_CONFIG] = |
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( 0 << 31) /* Master/Checker present bit */ |
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| (0x00 << 28) /* EC: system clock divisor, |
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0x00 = '2' */ |
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| (0x00 << 24) /* EP */ |
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| (0x00 << 22) /* SB */ |
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| (0x00 << 21) /* SS */ |
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| (0x00 << 20) /* SW */ |
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| (0x00 << 18) /* EW: 0=64-bit */ |
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| (0x01 << 17) /* SC: 0=secondary cache present, |
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1=non-present */ |
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| (0x00 << 16) /* SM: (todo) */ |
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| ((cpu->byte_order==EMUL_BIG_ENDIAN? 1 : 0) << 15) |
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/* endian mode */ |
283 |
| (0x01 << 14) /* ECC: 0=enabled, 1=disabled */ |
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| (0x00 << 13) /* EB: (todo) */ |
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| (0x00 << 12) /* 0 (resered) */ |
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| ( 3 << 9) /* IC: I-cache = 2^(12+IC) bytes |
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(1 = 8KB, 4=64K) */ |
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| ( 3 << 6) /* DC: D-cache = 2^(12+DC) bytes |
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(1 = 8KB, 4=64K) */ |
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| ( 1 << 5) /* IB: I-cache line size (0=16, |
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1=32) */ |
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| ( 1 << 4) /* DB: D-cache line size (0=16, |
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1=32) */ |
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| ( 0 << 3) /* CU: todo */ |
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| ( 0 << 0) /* kseg0 coherency algorithm |
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(TODO) */ |
297 |
; |
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break; |
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case MIPS_4Kc: |
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case MIPS_5Kc: |
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/* According to the MIPS64 5K User's Manual: */ |
302 |
/* TODO: How good does this work with 4K? */ |
303 |
c->reg[COP0_CONFIG] = |
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( (uint32_t)1 << 31)/* Config 1 present bit */ |
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| ( 0 << 20) /* ISD: instruction scheduling |
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disable (=1) */ |
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| ( 0 << 17) /* DID: dual issue disable */ |
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| ( 0 << 16) /* BM: burst mode */ |
309 |
| ((cpu->byte_order==EMUL_BIG_ENDIAN? 1 : 0) << 15) |
310 |
/* endian mode */ |
311 |
| ((cpu->cd.mips.cpu_type.rev==MIPS_5Kc?2:1) << 13) |
312 |
/* 1=32-bit only, 2=32/64 */ |
313 |
| ( 0 << 10) /* Architecture revision */ |
314 |
| ( 1 << 7) /* MMU type: 1=TLB, 3=FMT */ |
315 |
| ( 2 << 0) /* kseg0 cache coherency algorithm */ |
316 |
; |
317 |
/* TODO: Config select 1: caches and such */ |
318 |
break; |
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default: |
320 |
; |
321 |
} |
322 |
} |
323 |
|
324 |
|
325 |
/* |
326 |
* initialize_cop1(): |
327 |
* |
328 |
* Helper function, called from mips_coproc_new(). |
329 |
*/ |
330 |
static void initialize_cop1(struct cpu *cpu, struct mips_coproc *c) |
331 |
{ |
332 |
int fpu_rev; |
333 |
uint64_t other_stuff = 0; |
334 |
|
335 |
switch (cpu->cd.mips.cpu_type.rev & 0xff) { |
336 |
case MIPS_R2000: fpu_rev = MIPS_R2010; break; |
337 |
case MIPS_R3000: fpu_rev = MIPS_R3010; |
338 |
other_stuff |= 0x40; /* or 0x30? TODO */ |
339 |
break; |
340 |
case MIPS_R6000: fpu_rev = MIPS_R6010; break; |
341 |
case MIPS_R4000: fpu_rev = MIPS_R4010; break; |
342 |
case MIPS_4Kc: /* TODO: Is this the same as 5Kc? */ |
343 |
case MIPS_5Kc: other_stuff = COP1_REVISION_DOUBLE |
344 |
| COP1_REVISION_SINGLE; |
345 |
case MIPS_R5000: |
346 |
case MIPS_RM5200: fpu_rev = cpu->cd.mips.cpu_type.rev; |
347 |
other_stuff |= 0x10; |
348 |
/* or cpu->cd.mips.cpu_type.sub ? TODO */ |
349 |
break; |
350 |
case MIPS_R10000: fpu_rev = MIPS_R10000; break; |
351 |
case MIPS_R12000: fpu_rev = 0x9; break; |
352 |
default: fpu_rev = MIPS_SOFT; |
353 |
} |
354 |
|
355 |
c->fcr[COP1_REVISION] = (fpu_rev << 8) | other_stuff; |
356 |
|
357 |
#if 0 |
358 |
/* These are mentioned in the MIPS64 documentation: */ |
359 |
+ (1 << 16) /* single */ |
360 |
+ (1 << 17) /* double */ |
361 |
+ (1 << 18) /* paired-single */ |
362 |
+ (1 << 19) /* 3d */ |
363 |
#endif |
364 |
} |
365 |
|
366 |
|
367 |
/* |
368 |
* mips_coproc_new(): |
369 |
* |
370 |
* Create a new MIPS coprocessor object. |
371 |
*/ |
372 |
struct mips_coproc *mips_coproc_new(struct cpu *cpu, int coproc_nr) |
373 |
{ |
374 |
struct mips_coproc *c; |
375 |
|
376 |
c = malloc(sizeof(struct mips_coproc)); |
377 |
if (c == NULL) { |
378 |
fprintf(stderr, "out of memory\n"); |
379 |
exit(1); |
380 |
} |
381 |
|
382 |
memset(c, 0, sizeof(struct mips_coproc)); |
383 |
c->coproc_nr = coproc_nr; |
384 |
|
385 |
if (coproc_nr == 0) { |
386 |
c->nr_of_tlbs = cpu->cd.mips.cpu_type.nr_of_tlb_entries; |
387 |
c->tlbs = malloc(c->nr_of_tlbs * sizeof(struct mips_tlb)); |
388 |
if (c->tlbs == NULL) { |
389 |
fprintf(stderr, "mips_coproc_new(): out of memory\n"); |
390 |
exit(1); |
391 |
} |
392 |
|
393 |
/* |
394 |
* Start with nothing in the status register. This makes sure |
395 |
* that we are running in kernel mode with all interrupts |
396 |
* disabled. |
397 |
*/ |
398 |
c->reg[COP0_STATUS] = 0; |
399 |
|
400 |
/* For userland emulation, enable all four coprocessors: */ |
401 |
if (cpu->machine->userland_emul) |
402 |
c->reg[COP0_STATUS] |= |
403 |
((uint32_t)0xf << STATUS_CU_SHIFT); |
404 |
|
405 |
/* Hm. Enable coprocessors 0 and 1 even if we're not just |
406 |
emulating userland? TODO: Think about this. */ |
407 |
if (cpu->machine->prom_emulation) |
408 |
c->reg[COP0_STATUS] |= |
409 |
((uint32_t)0x3 << STATUS_CU_SHIFT); |
410 |
|
411 |
if (!cpu->machine->prom_emulation) |
412 |
c->reg[COP0_STATUS] |= STATUS_BEV; |
413 |
|
414 |
/* Note: .rev may contain the company ID as well! */ |
415 |
c->reg[COP0_PRID] = |
416 |
(0x00 << 24) /* Company Options */ |
417 |
| (0x00 << 16) /* Company ID */ |
418 |
| (cpu->cd.mips.cpu_type.rev << 8) /* Processor ID */ |
419 |
| (cpu->cd.mips.cpu_type.sub) /* Revision */ |
420 |
; |
421 |
|
422 |
c->reg[COP0_WIRED] = 0; |
423 |
|
424 |
initialize_cop0_config(cpu, c); |
425 |
|
426 |
/* Make sure the status register is sign-extended nicely: */ |
427 |
c->reg[COP0_STATUS] = (int64_t)(int32_t)c->reg[COP0_STATUS]; |
428 |
} |
429 |
|
430 |
if (coproc_nr == 1) |
431 |
initialize_cop1(cpu, c); |
432 |
|
433 |
return c; |
434 |
} |
435 |
|
436 |
|
437 |
/* |
438 |
* mips_coproc_tlb_set_entry(): |
439 |
* |
440 |
* Used by machine setup code, if a specific machine emulation starts up |
441 |
* with hardcoded virtual to physical mappings. |
442 |
*/ |
443 |
void mips_coproc_tlb_set_entry(struct cpu *cpu, int entrynr, int size, |
444 |
uint64_t vaddr, uint64_t paddr0, uint64_t paddr1, |
445 |
int valid0, int valid1, int dirty0, int dirty1, int global, int asid, |
446 |
int cachealgo0, int cachealgo1) |
447 |
{ |
448 |
if (entrynr < 0 || entrynr >= cpu->cd.mips.coproc[0]->nr_of_tlbs) { |
449 |
printf("mips_coproc_tlb_set_entry(): invalid entry nr: %i\n", |
450 |
entrynr); |
451 |
exit(1); |
452 |
} |
453 |
|
454 |
switch (cpu->cd.mips.cpu_type.mmu_model) { |
455 |
case MMU3K: |
456 |
if (size != 4096) { |
457 |
printf("mips_coproc_tlb_set_entry(): invalid pagesize " |
458 |
"(%i) for MMU3K\n", size); |
459 |
exit(1); |
460 |
} |
461 |
cpu->cd.mips.coproc[0]->tlbs[entrynr].hi = |
462 |
(vaddr & R2K3K_ENTRYHI_VPN_MASK) | |
463 |
((asid << R2K3K_ENTRYHI_ASID_SHIFT) & |
464 |
R2K3K_ENTRYHI_ASID_MASK); |
465 |
cpu->cd.mips.coproc[0]->tlbs[entrynr].lo0 = |
466 |
(paddr0 & R2K3K_ENTRYLO_PFN_MASK) | |
467 |
(cachealgo0? R2K3K_ENTRYLO_N : 0) | |
468 |
(dirty0? R2K3K_ENTRYLO_D : 0) | |
469 |
(valid0? R2K3K_ENTRYLO_V : 0) | |
470 |
(global? R2K3K_ENTRYLO_G : 0); |
471 |
break; |
472 |
default: |
473 |
/* MMU4K and MMU10K, etc: */ |
474 |
if (cpu->cd.mips.cpu_type.mmu_model == MMU10K) |
475 |
cpu->cd.mips.coproc[0]->tlbs[entrynr].hi = |
476 |
(vaddr & ENTRYHI_VPN2_MASK_R10K) | |
477 |
(vaddr & ENTRYHI_R_MASK) | |
478 |
(asid & ENTRYHI_ASID) | |
479 |
(global? TLB_G : 0); |
480 |
else |
481 |
cpu->cd.mips.coproc[0]->tlbs[entrynr].hi = |
482 |
(vaddr & ENTRYHI_VPN2_MASK) | |
483 |
(vaddr & ENTRYHI_R_MASK) | |
484 |
(asid & ENTRYHI_ASID) | |
485 |
(global? TLB_G : 0); |
486 |
/* NOTE: The pagemask size is for a "dual" page: */ |
487 |
cpu->cd.mips.coproc[0]->tlbs[entrynr].mask = |
488 |
(2*size - 1) & ~0x1fff; |
489 |
cpu->cd.mips.coproc[0]->tlbs[entrynr].lo0 = |
490 |
(((paddr0 >> 12) << ENTRYLO_PFN_SHIFT) & |
491 |
ENTRYLO_PFN_MASK) | |
492 |
(dirty0? ENTRYLO_D : 0) | |
493 |
(valid0? ENTRYLO_V : 0) | |
494 |
(global? ENTRYLO_G : 0) | |
495 |
((cachealgo0 << ENTRYLO_C_SHIFT) & ENTRYLO_C_MASK); |
496 |
cpu->cd.mips.coproc[0]->tlbs[entrynr].lo1 = |
497 |
(((paddr1 >> 12) << ENTRYLO_PFN_SHIFT) & |
498 |
ENTRYLO_PFN_MASK) | |
499 |
(dirty1? ENTRYLO_D : 0) | |
500 |
(valid1? ENTRYLO_V : 0) | |
501 |
(global? ENTRYLO_G : 0) | |
502 |
((cachealgo1 << ENTRYLO_C_SHIFT) & ENTRYLO_C_MASK); |
503 |
/* TODO: R4100, 1KB pages etc */ |
504 |
} |
505 |
} |
506 |
|
507 |
|
508 |
/* |
509 |
* old_update_translation_table(): |
510 |
*/ |
511 |
static void old_update_translation_table(struct cpu *cpu, uint64_t vaddr_page, |
512 |
unsigned char *host_page, int writeflag, uint64_t paddr_page) |
513 |
{ |
514 |
#ifdef BINTRANS |
515 |
int a, b; |
516 |
struct vth32_table *tbl1; |
517 |
void *p; |
518 |
uint32_t p_paddr; |
519 |
|
520 |
/* This table stuff only works for 32-bit mode: */ |
521 |
if (vaddr_page & 0x80000000ULL) { |
522 |
if ((vaddr_page >> 32) != 0xffffffffULL) |
523 |
return; |
524 |
} else { |
525 |
if ((vaddr_page >> 32) != 0) |
526 |
return; |
527 |
} |
528 |
|
529 |
a = (vaddr_page >> 22) & 0x3ff; |
530 |
b = (vaddr_page >> 12) & 0x3ff; |
531 |
/* printf("vaddr = %08x, a = %03x, b = %03x\n", |
532 |
(int)vaddr_page,a, b); */ |
533 |
tbl1 = cpu->cd.mips.vaddr_to_hostaddr_table0_kernel[a]; |
534 |
/* printf("tbl1 = %p\n", tbl1); */ |
535 |
if (tbl1 == cpu->cd.mips.vaddr_to_hostaddr_nulltable) { |
536 |
/* Allocate a new table1: */ |
537 |
/* printf("ALLOCATING a new table1, 0x%08x - " |
538 |
"0x%08x\n", a << 22, (a << 22) + 0x3fffff); */ |
539 |
if (cpu->cd.mips.next_free_vth_table == NULL) { |
540 |
tbl1 = malloc(sizeof(struct vth32_table)); |
541 |
if (tbl1 == NULL) { |
542 |
fprintf(stderr, "out of mem\n"); |
543 |
exit(1); |
544 |
} |
545 |
memset(tbl1, 0, sizeof(struct vth32_table)); |
546 |
} else { |
547 |
tbl1 = cpu->cd.mips.next_free_vth_table; |
548 |
cpu->cd.mips.next_free_vth_table = |
549 |
tbl1->next_free; |
550 |
tbl1->next_free = NULL; |
551 |
} |
552 |
cpu->cd.mips.vaddr_to_hostaddr_table0_kernel[a] = tbl1; |
553 |
if (tbl1->refcount != 0) { |
554 |
printf("INTERNAL ERROR in coproc.c\n"); |
555 |
exit(1); |
556 |
} |
557 |
} |
558 |
p = tbl1->haddr_entry[b]; |
559 |
p_paddr = tbl1->paddr_entry[b]; |
560 |
/* printf(" p = %p\n", p); */ |
561 |
if (p == NULL && p_paddr == 0 && |
562 |
(host_page!=NULL || paddr_page!=0)) { |
563 |
tbl1->refcount ++; |
564 |
/* printf("ADDING %08x -> %p wf=%i (refcount is " |
565 |
"now %i)\n", (int)vaddr_page, host_page, |
566 |
writeflag, tbl1->refcount); */ |
567 |
} |
568 |
if (writeflag == -1) { |
569 |
/* Forced downgrade to read-only: */ |
570 |
tbl1->haddr_entry[b] = (void *) |
571 |
((size_t)tbl1->haddr_entry[b] & ~1); |
572 |
} else if (writeflag==0 && (size_t)p&1 && host_page != NULL) { |
573 |
/* Don't degrade a page from writable to readonly. */ |
574 |
} else { |
575 |
if (host_page != NULL) |
576 |
tbl1->haddr_entry[b] = (void *) |
577 |
((size_t)host_page + (writeflag?1:0)); |
578 |
else |
579 |
tbl1->haddr_entry[b] = NULL; |
580 |
tbl1->paddr_entry[b] = paddr_page; |
581 |
} |
582 |
tbl1->bintrans_chunks[b] = NULL; |
583 |
#endif |
584 |
} |
585 |
|
586 |
|
587 |
/* |
588 |
* update_translation_table(): |
589 |
*/ |
590 |
void update_translation_table(struct cpu *cpu, uint64_t vaddr_page, |
591 |
unsigned char *host_page, int writeflag, uint64_t paddr_page) |
592 |
{ |
593 |
#ifdef BINTRANS |
594 |
if (!cpu->machine->bintrans_enable) |
595 |
return; |
596 |
|
597 |
if (writeflag > 0) |
598 |
bintrans_invalidate(cpu, paddr_page); |
599 |
|
600 |
if (cpu->machine->old_bintrans_enable) { |
601 |
old_update_translation_table(cpu, vaddr_page, host_page, |
602 |
writeflag, paddr_page); |
603 |
return; |
604 |
} |
605 |
|
606 |
/* TODO */ |
607 |
/* printf("update_translation_table(): TODO\n"); */ |
608 |
#endif |
609 |
} |
610 |
|
611 |
|
612 |
#ifdef BINTRANS |
613 |
/* |
614 |
* invalidate_table_entry(): |
615 |
*/ |
616 |
static void invalidate_table_entry(struct cpu *cpu, uint64_t vaddr) |
617 |
{ |
618 |
int a, b; |
619 |
struct vth32_table *tbl1; |
620 |
void *p; |
621 |
uint32_t p_paddr; |
622 |
|
623 |
if (!cpu->machine->old_bintrans_enable) { |
624 |
/* printf("invalidate_table_entry(): New: TODO\n"); */ |
625 |
return; |
626 |
} |
627 |
|
628 |
/* This table stuff only works for 32-bit mode: */ |
629 |
if (vaddr & 0x80000000ULL) { |
630 |
if ((vaddr >> 32) != 0xffffffffULL) { |
631 |
fatal("invalidate_table_entry(): vaddr = 0x%016llx\n", |
632 |
(long long)vaddr); |
633 |
return; |
634 |
} |
635 |
} else { |
636 |
if ((vaddr >> 32) != 0) { |
637 |
fatal("invalidate_table_entry(): vaddr = 0x%016llx\n", |
638 |
(long long)vaddr); |
639 |
return; |
640 |
} |
641 |
} |
642 |
|
643 |
a = (vaddr >> 22) & 0x3ff; |
644 |
b = (vaddr >> 12) & 0x3ff; |
645 |
|
646 |
/* printf("vaddr = %08x, a = %03x, b = %03x\n", (int)vaddr,a, b); */ |
647 |
|
648 |
tbl1 = cpu->cd.mips.vaddr_to_hostaddr_table0_kernel[a]; |
649 |
/* printf("tbl1 = %p\n", tbl1); */ |
650 |
p = tbl1->haddr_entry[b]; |
651 |
p_paddr = tbl1->paddr_entry[b]; |
652 |
tbl1->bintrans_chunks[b] = NULL; |
653 |
/* printf(" p = %p\n", p); */ |
654 |
if (p != NULL || p_paddr != 0) { |
655 |
/* printf("Found a mapping, " |
656 |
"vaddr = %08x, a = %03x, b = %03x\n", (int)vaddr,a, b); */ |
657 |
tbl1->haddr_entry[b] = NULL; |
658 |
tbl1->paddr_entry[b] = 0; |
659 |
tbl1->refcount --; |
660 |
if (tbl1->refcount == 0) { |
661 |
cpu->cd.mips.vaddr_to_hostaddr_table0_kernel[a] = |
662 |
cpu->cd.mips.vaddr_to_hostaddr_nulltable; |
663 |
/* "free" tbl1: */ |
664 |
tbl1->next_free = cpu->cd.mips.next_free_vth_table; |
665 |
cpu->cd.mips.next_free_vth_table = tbl1; |
666 |
} |
667 |
} |
668 |
} |
669 |
|
670 |
|
671 |
/* |
672 |
* clear_all_chunks_from_all_tables(): |
673 |
*/ |
674 |
void clear_all_chunks_from_all_tables(struct cpu *cpu) |
675 |
{ |
676 |
int a, b; |
677 |
struct vth32_table *tbl1; |
678 |
|
679 |
if (!cpu->machine->old_bintrans_enable) { |
680 |
printf("clear_all_chunks_from_all_tables(): New: TODO\n"); |
681 |
return; |
682 |
} |
683 |
|
684 |
for (a=0; a<0x400; a++) { |
685 |
tbl1 = cpu->cd.mips.vaddr_to_hostaddr_table0_kernel[a]; |
686 |
if (tbl1 != cpu->cd.mips.vaddr_to_hostaddr_nulltable) { |
687 |
for (b=0; b<0x400; b++) |
688 |
tbl1->bintrans_chunks[b] = NULL; |
689 |
} |
690 |
} |
691 |
} |
692 |
#endif |
693 |
|
694 |
|
695 |
/* |
696 |
* mips_invalidate_translation_caches_paddr(): |
697 |
* |
698 |
* Invalidate based on physical address. |
699 |
*/ |
700 |
void mips_invalidate_translation_caches_paddr(struct cpu *cpu, uint64_t paddr) |
701 |
{ |
702 |
#ifdef BINTRANS |
703 |
paddr &= ~0xfff; |
704 |
|
705 |
if (cpu->machine->bintrans_enable) { |
706 |
#if 1 |
707 |
int i; |
708 |
uint64_t tlb_paddr0, tlb_paddr1; |
709 |
uint64_t tlb_vaddr; |
710 |
uint64_t p, p2; |
711 |
|
712 |
switch (cpu->cd.mips.cpu_type.mmu_model) { |
713 |
case MMU3K: |
714 |
for (i=0; i<64; i++) { |
715 |
tlb_paddr0 = cpu->cd.mips.coproc[0]-> |
716 |
tlbs[i].lo0 & R2K3K_ENTRYLO_PFN_MASK; |
717 |
tlb_vaddr = cpu->cd.mips.coproc[0]-> |
718 |
tlbs[i].hi & R2K3K_ENTRYHI_VPN_MASK; |
719 |
tlb_vaddr = (int64_t)(int32_t)tlb_vaddr; |
720 |
if ((cpu->cd.mips.coproc[0]->tlbs[i].lo0 & |
721 |
R2K3K_ENTRYLO_V) && tlb_paddr0 == paddr) |
722 |
invalidate_table_entry(cpu, tlb_vaddr); |
723 |
} |
724 |
break; |
725 |
default: |
726 |
for (i=0; i<cpu->cd.mips.coproc[0]->nr_of_tlbs; i++) { |
727 |
int psize = 12; |
728 |
int or_pmask = 0x1fff; |
729 |
int phys_shift = 12; |
730 |
|
731 |
if (cpu->cd.mips.cpu_type.rev == MIPS_R4100) { |
732 |
or_pmask = 0x7ff; |
733 |
phys_shift = 10; |
734 |
} |
735 |
switch (cpu->cd.mips.coproc[0]-> |
736 |
tlbs[i].mask | or_pmask) { |
737 |
case 0x000007ff: psize = 10; break; |
738 |
case 0x00001fff: psize = 12; break; |
739 |
case 0x00007fff: psize = 14; break; |
740 |
case 0x0001ffff: psize = 16; break; |
741 |
case 0x0007ffff: psize = 18; break; |
742 |
case 0x001fffff: psize = 20; break; |
743 |
case 0x007fffff: psize = 22; break; |
744 |
case 0x01ffffff: psize = 24; break; |
745 |
case 0x07ffffff: psize = 26; break; |
746 |
default: |
747 |
printf("invalidate_translation_caches" |
748 |
"_paddr(): bad pagemask?\n"); |
749 |
} |
750 |
tlb_paddr0 = (cpu->cd.mips.coproc[0]->tlbs[i]. |
751 |
lo0 & ENTRYLO_PFN_MASK)>>ENTRYLO_PFN_SHIFT; |
752 |
tlb_paddr1 = (cpu->cd.mips.coproc[0]->tlbs[i]. |
753 |
lo1 & ENTRYLO_PFN_MASK)>>ENTRYLO_PFN_SHIFT; |
754 |
tlb_paddr0 <<= phys_shift; |
755 |
tlb_paddr1 <<= phys_shift; |
756 |
if (cpu->cd.mips.cpu_type.mmu_model == MMU10K) { |
757 |
tlb_vaddr = cpu->cd.mips.coproc[0]-> |
758 |
tlbs[i].hi & ENTRYHI_VPN2_MASK_R10K; |
759 |
if (tlb_vaddr & ((int64_t)1 << 43)) |
760 |
tlb_vaddr |= |
761 |
0xfffff00000000000ULL; |
762 |
} else { |
763 |
tlb_vaddr = cpu->cd.mips.coproc[0]-> |
764 |
tlbs[i].hi & ENTRYHI_VPN2_MASK; |
765 |
if (tlb_vaddr & ((int64_t)1 << 39)) |
766 |
tlb_vaddr |= |
767 |
0xffffff0000000000ULL; |
768 |
} |
769 |
if ((cpu->cd.mips.coproc[0]->tlbs[i].lo0 & |
770 |
ENTRYLO_V) && paddr >= tlb_paddr0 && |
771 |
paddr < tlb_paddr0 + (1<<psize)) { |
772 |
p2 = 1 << psize; |
773 |
for (p=0; p<p2; p+=4096) |
774 |
invalidate_table_entry(cpu, |
775 |
tlb_vaddr + p); |
776 |
} |
777 |
if ((cpu->cd.mips.coproc[0]->tlbs[i].lo1 & |
778 |
ENTRYLO_V) && paddr >= tlb_paddr1 && |
779 |
paddr < tlb_paddr1 + (1<<psize)) { |
780 |
p2 = 1 << psize; |
781 |
for (p=0; p<p2; p+=4096) |
782 |
invalidate_table_entry(cpu, |
783 |
tlb_vaddr + p + |
784 |
(1 << psize)); |
785 |
} |
786 |
} |
787 |
} |
788 |
#endif |
789 |
|
790 |
if (paddr < 0x20000000) { |
791 |
invalidate_table_entry(cpu, 0xffffffff80000000ULL |
792 |
+ paddr); |
793 |
invalidate_table_entry(cpu, 0xffffffffa0000000ULL |
794 |
+ paddr); |
795 |
} |
796 |
} |
797 |
|
798 |
#if 0 |
799 |
{ |
800 |
int i; |
801 |
|
802 |
/* TODO: Don't invalidate everything. */ |
803 |
for (i=0; i<N_BINTRANS_VADDR_TO_HOST; i++) |
804 |
cpu->bintrans_data_hostpage[i] = NULL; |
805 |
} |
806 |
#endif |
807 |
|
808 |
#endif |
809 |
} |
810 |
|
811 |
|
812 |
/* |
813 |
* invalidate_translation_caches(): |
814 |
* |
815 |
* This is necessary for every change to the TLB, and when the ASID is changed, |
816 |
* so that for example user-space addresses are not cached when they should |
817 |
* not be. |
818 |
*/ |
819 |
static void invalidate_translation_caches(struct cpu *cpu, |
820 |
int all, uint64_t vaddr, int kernelspace, int old_asid_to_invalidate) |
821 |
{ |
822 |
int i; |
823 |
|
824 |
/* printf("inval(all=%i, kernel=%i, addr=%016llx)\n", |
825 |
all, kernelspace, (long long)vaddr); */ |
826 |
|
827 |
#ifdef BINTRANS |
828 |
if (!cpu->machine->bintrans_enable) |
829 |
goto nobintrans; |
830 |
|
831 |
if (all) { |
832 |
int i; |
833 |
uint64_t tlb_vaddr; |
834 |
switch (cpu->cd.mips.cpu_type.mmu_model) { |
835 |
case MMU3K: |
836 |
for (i=0; i<64; i++) { |
837 |
tlb_vaddr = cpu->cd.mips.coproc[0]->tlbs[i].hi |
838 |
& R2K3K_ENTRYHI_VPN_MASK; |
839 |
tlb_vaddr = (int64_t)(int32_t)tlb_vaddr; |
840 |
if ((cpu->cd.mips.coproc[0]->tlbs[i].lo0 & |
841 |
R2K3K_ENTRYLO_V) && (tlb_vaddr & |
842 |
0xc0000000ULL) != 0x80000000ULL) { |
843 |
int asid = (cpu->cd.mips.coproc[0]-> |
844 |
tlbs[i].hi & R2K3K_ENTRYHI_ASID_MASK |
845 |
) >> R2K3K_ENTRYHI_ASID_SHIFT; |
846 |
if (old_asid_to_invalidate < 0 || |
847 |
old_asid_to_invalidate == asid) |
848 |
invalidate_table_entry(cpu, |
849 |
tlb_vaddr); |
850 |
} |
851 |
} |
852 |
break; |
853 |
default: |
854 |
for (i=0; i<cpu->cd.mips.coproc[0]->nr_of_tlbs; i++) { |
855 |
int psize = 10, or_pmask = 0x1fff; |
856 |
int phys_shift = 12; |
857 |
|
858 |
if (cpu->cd.mips.cpu_type.rev == MIPS_R4100) { |
859 |
or_pmask = 0x7ff; |
860 |
phys_shift = 10; |
861 |
} |
862 |
|
863 |
switch (cpu->cd.mips.coproc[0]->tlbs[i].mask |
864 |
| or_pmask) { |
865 |
case 0x000007ff: psize = 10; break; |
866 |
case 0x00001fff: psize = 12; break; |
867 |
case 0x00007fff: psize = 14; break; |
868 |
case 0x0001ffff: psize = 16; break; |
869 |
case 0x0007ffff: psize = 18; break; |
870 |
case 0x001fffff: psize = 20; break; |
871 |
case 0x007fffff: psize = 22; break; |
872 |
case 0x01ffffff: psize = 24; break; |
873 |
case 0x07ffffff: psize = 26; break; |
874 |
default: |
875 |
printf("invalidate_translation_caches" |
876 |
"(): bad pagemask?\n"); |
877 |
} |
878 |
|
879 |
if (cpu->cd.mips.cpu_type.mmu_model == MMU10K) { |
880 |
tlb_vaddr = cpu->cd.mips.coproc[0]-> |
881 |
tlbs[i].hi & ENTRYHI_VPN2_MASK_R10K; |
882 |
if (tlb_vaddr & ((int64_t)1 << 43)) |
883 |
tlb_vaddr |= |
884 |
0xfffff00000000000ULL; |
885 |
} else { |
886 |
tlb_vaddr = cpu->cd.mips.coproc[0]-> |
887 |
tlbs[i].hi & ENTRYHI_VPN2_MASK; |
888 |
if (tlb_vaddr & ((int64_t)1 << 39)) |
889 |
tlb_vaddr |= |
890 |
0xffffff0000000000ULL; |
891 |
} |
892 |
|
893 |
/* TODO: Check the ASID etc. */ |
894 |
|
895 |
invalidate_table_entry(cpu, tlb_vaddr); |
896 |
invalidate_table_entry(cpu, tlb_vaddr | |
897 |
(1 << psize)); |
898 |
} |
899 |
} |
900 |
} else |
901 |
invalidate_table_entry(cpu, vaddr); |
902 |
|
903 |
nobintrans: |
904 |
|
905 |
/* TODO: Don't invalidate everything. */ |
906 |
for (i=0; i<N_BINTRANS_VADDR_TO_HOST; i++) |
907 |
cpu->cd.mips.bintrans_data_hostpage[i] = NULL; |
908 |
#endif |
909 |
|
910 |
if (kernelspace) |
911 |
all = 1; |
912 |
|
913 |
#ifdef USE_TINY_CACHE |
914 |
{ |
915 |
vaddr >>= 12; |
916 |
|
917 |
/* Invalidate the tiny translation cache... */ |
918 |
if (!cpu->machine->bintrans_enable) |
919 |
for (i=0; i<N_TRANSLATION_CACHE_INSTR; i++) |
920 |
if (all || vaddr == (cpu->cd.mips. |
921 |
translation_cache_instr[i].vaddr_pfn)) |
922 |
cpu->cd.mips.translation_cache_instr[i].wf = 0; |
923 |
|
924 |
if (!cpu->machine->bintrans_enable) |
925 |
for (i=0; i<N_TRANSLATION_CACHE_DATA; i++) |
926 |
if (all || vaddr == (cpu->cd.mips. |
927 |
translation_cache_data[i].vaddr_pfn)) |
928 |
cpu->cd.mips.translation_cache_data[i].wf = 0; |
929 |
} |
930 |
#endif |
931 |
} |
932 |
|
933 |
|
934 |
/* |
935 |
* coproc_register_read(); |
936 |
* |
937 |
* Read a value from a MIPS coprocessor register. |
938 |
*/ |
939 |
void coproc_register_read(struct cpu *cpu, |
940 |
struct mips_coproc *cp, int reg_nr, uint64_t *ptr) |
941 |
{ |
942 |
int unimpl = 1; |
943 |
|
944 |
if (cp->coproc_nr==0 && reg_nr==COP0_INDEX) unimpl = 0; |
945 |
if (cp->coproc_nr==0 && reg_nr==COP0_RANDOM) unimpl = 0; |
946 |
if (cp->coproc_nr==0 && reg_nr==COP0_ENTRYLO0) unimpl = 0; |
947 |
if (cp->coproc_nr==0 && reg_nr==COP0_ENTRYLO1) unimpl = 0; |
948 |
if (cp->coproc_nr==0 && reg_nr==COP0_CONTEXT) unimpl = 0; |
949 |
if (cp->coproc_nr==0 && reg_nr==COP0_PAGEMASK) unimpl = 0; |
950 |
if (cp->coproc_nr==0 && reg_nr==COP0_WIRED) unimpl = 0; |
951 |
if (cp->coproc_nr==0 && reg_nr==COP0_BADVADDR) unimpl = 0; |
952 |
if (cp->coproc_nr==0 && reg_nr==COP0_COUNT) unimpl = 0; |
953 |
if (cp->coproc_nr==0 && reg_nr==COP0_ENTRYHI) unimpl = 0; |
954 |
if (cp->coproc_nr==0 && reg_nr==COP0_COMPARE) unimpl = 0; |
955 |
if (cp->coproc_nr==0 && reg_nr==COP0_STATUS) unimpl = 0; |
956 |
if (cp->coproc_nr==0 && reg_nr==COP0_CAUSE) unimpl = 0; |
957 |
if (cp->coproc_nr==0 && reg_nr==COP0_EPC) unimpl = 0; |
958 |
if (cp->coproc_nr==0 && reg_nr==COP0_PRID) unimpl = 0; |
959 |
if (cp->coproc_nr==0 && reg_nr==COP0_CONFIG) unimpl = 0; |
960 |
if (cp->coproc_nr==0 && reg_nr==COP0_LLADDR) unimpl = 0; |
961 |
if (cp->coproc_nr==0 && reg_nr==COP0_WATCHLO) unimpl = 0; |
962 |
if (cp->coproc_nr==0 && reg_nr==COP0_WATCHHI) unimpl = 0; |
963 |
if (cp->coproc_nr==0 && reg_nr==COP0_XCONTEXT) unimpl = 0; |
964 |
if (cp->coproc_nr==0 && reg_nr==COP0_ERRCTL) unimpl = 0; |
965 |
if (cp->coproc_nr==0 && reg_nr==COP0_CACHEERR) unimpl = 0; |
966 |
if (cp->coproc_nr==0 && reg_nr==COP0_TAGDATA_LO) unimpl = 0; |
967 |
if (cp->coproc_nr==0 && reg_nr==COP0_TAGDATA_HI) unimpl = 0; |
968 |
if (cp->coproc_nr==0 && reg_nr==COP0_ERROREPC) unimpl = 0; |
969 |
if (cp->coproc_nr==0 && reg_nr==COP0_RESERV22) { |
970 |
/* Used by Linux on Linksys WRT54G */ |
971 |
unimpl = 0; |
972 |
} |
973 |
if (cp->coproc_nr==0 && reg_nr==COP0_DEBUG) unimpl = 0; |
974 |
if (cp->coproc_nr==0 && reg_nr==COP0_PERFCNT) unimpl = 0; |
975 |
if (cp->coproc_nr==0 && reg_nr==COP0_DESAVE) unimpl = 0; |
976 |
|
977 |
if (cp->coproc_nr==1) unimpl = 0; |
978 |
|
979 |
if (unimpl) { |
980 |
fatal("cpu%i: warning: read from unimplemented coproc%i" |
981 |
" register %i (%s)\n", cpu->cpu_id, cp->coproc_nr, reg_nr, |
982 |
cp->coproc_nr==0? cop0_names[reg_nr] : "?"); |
983 |
|
984 |
mips_cpu_exception(cpu, EXCEPTION_CPU, 0, 0, |
985 |
cp->coproc_nr, 0, 0, 0); |
986 |
return; |
987 |
} |
988 |
|
989 |
*ptr = cp->reg[reg_nr]; |
990 |
} |
991 |
|
992 |
|
993 |
/* |
994 |
* coproc_register_write(); |
995 |
* |
996 |
* Write a value to a MIPS coprocessor register. |
997 |
*/ |
998 |
void coproc_register_write(struct cpu *cpu, |
999 |
struct mips_coproc *cp, int reg_nr, uint64_t *ptr, int flag64) |
1000 |
{ |
1001 |
int unimpl = 1; |
1002 |
int readonly = 0; |
1003 |
uint64_t tmp = *ptr; |
1004 |
uint64_t tmp2 = 0, old; |
1005 |
int inval = 0, old_asid, oldmode; |
1006 |
|
1007 |
switch (cp->coproc_nr) { |
1008 |
case 0: |
1009 |
/* COPROC 0: */ |
1010 |
switch (reg_nr) { |
1011 |
case COP0_INDEX: |
1012 |
case COP0_RANDOM: |
1013 |
unimpl = 0; |
1014 |
break; |
1015 |
case COP0_ENTRYLO0: |
1016 |
unimpl = 0; |
1017 |
if (cpu->cd.mips.cpu_type.mmu_model == MMU3K && |
1018 |
(tmp & 0xff)!=0) { |
1019 |
/* char *symbol; |
1020 |
uint64_t offset; |
1021 |
symbol = get_symbol_name( |
1022 |
cpu->cd.mips.pc_last, &offset); |
1023 |
fatal("YO! pc = 0x%08llx <%s> " |
1024 |
"lo=%016llx\n", (long long) |
1025 |
cpu->cd.mips.pc_last, symbol? symbol : |
1026 |
"no symbol", (long long)tmp); */ |
1027 |
tmp &= (R2K3K_ENTRYLO_PFN_MASK | |
1028 |
R2K3K_ENTRYLO_N | R2K3K_ENTRYLO_D | |
1029 |
R2K3K_ENTRYLO_V | R2K3K_ENTRYLO_G); |
1030 |
} else if (cpu->cd.mips.cpu_type.mmu_model == MMU4K) { |
1031 |
tmp &= (ENTRYLO_PFN_MASK | ENTRYLO_C_MASK | |
1032 |
ENTRYLO_D | ENTRYLO_V | ENTRYLO_G); |
1033 |
} |
1034 |
break; |
1035 |
case COP0_BADVADDR: |
1036 |
/* Hm. Irix writes to this register. (Why?) */ |
1037 |
unimpl = 0; |
1038 |
break; |
1039 |
case COP0_ENTRYLO1: |
1040 |
unimpl = 0; |
1041 |
if (cpu->cd.mips.cpu_type.mmu_model == MMU4K) { |
1042 |
tmp &= (ENTRYLO_PFN_MASK | ENTRYLO_C_MASK | |
1043 |
ENTRYLO_D | ENTRYLO_V | ENTRYLO_G); |
1044 |
} |
1045 |
break; |
1046 |
case COP0_CONTEXT: |
1047 |
old = cp->reg[COP0_CONTEXT]; |
1048 |
cp->reg[COP0_CONTEXT] = tmp; |
1049 |
if (cpu->cd.mips.cpu_type.mmu_model == MMU3K) { |
1050 |
cp->reg[COP0_CONTEXT] &= |
1051 |
~R2K3K_CONTEXT_BADVPN_MASK; |
1052 |
cp->reg[COP0_CONTEXT] |= |
1053 |
(old & R2K3K_CONTEXT_BADVPN_MASK); |
1054 |
} else if (cpu->cd.mips.cpu_type.rev == MIPS_R4100) { |
1055 |
cp->reg[COP0_CONTEXT] &= |
1056 |
~CONTEXT_BADVPN2_MASK_R4100; |
1057 |
cp->reg[COP0_CONTEXT] |= |
1058 |
(old & CONTEXT_BADVPN2_MASK_R4100); |
1059 |
} else { |
1060 |
cp->reg[COP0_CONTEXT] &= |
1061 |
~CONTEXT_BADVPN2_MASK; |
1062 |
cp->reg[COP0_CONTEXT] |= |
1063 |
(old & CONTEXT_BADVPN2_MASK); |
1064 |
} |
1065 |
return; |
1066 |
case COP0_PAGEMASK: |
1067 |
tmp2 = tmp >> PAGEMASK_SHIFT; |
1068 |
if (tmp2 != 0x000 && |
1069 |
tmp2 != 0x003 && |
1070 |
tmp2 != 0x00f && |
1071 |
tmp2 != 0x03f && |
1072 |
tmp2 != 0x0ff && |
1073 |
tmp2 != 0x3ff && |
1074 |
tmp2 != 0xfff) |
1075 |
fatal("cpu%i: trying to write an invalid" |
1076 |
" pagemask 0x%08lx to COP0_PAGEMASK\n", |
1077 |
cpu->cpu_id, (long)tmp); |
1078 |
unimpl = 0; |
1079 |
break; |
1080 |
case COP0_WIRED: |
1081 |
if (cpu->cd.mips.cpu_type.mmu_model == MMU3K) { |
1082 |
fatal("cpu%i: r2k/r3k wired register must " |
1083 |
"always be 8\n", cpu->cpu_id); |
1084 |
tmp = 8; |
1085 |
} |
1086 |
cp->reg[COP0_RANDOM] = cp->nr_of_tlbs-1; |
1087 |
tmp &= INDEX_MASK; |
1088 |
unimpl = 0; |
1089 |
break; |
1090 |
case COP0_COUNT: |
1091 |
if (tmp != (int64_t)(int32_t)tmp) |
1092 |
fatal("WARNING: trying to write a 64-bit value" |
1093 |
" to the COUNT register!\n"); |
1094 |
tmp = (int64_t)(int32_t)tmp; |
1095 |
unimpl = 0; |
1096 |
break; |
1097 |
case COP0_COMPARE: |
1098 |
/* Clear the timer interrupt bit (bit 7): */ |
1099 |
cpu->cd.mips.compare_register_set = 1; |
1100 |
mips_cpu_interrupt_ack(cpu, 7); |
1101 |
if (tmp != (int64_t)(int32_t)tmp) |
1102 |
fatal("WARNING: trying to write a 64-bit value" |
1103 |
" to the COMPARE register!\n"); |
1104 |
tmp = (int64_t)(int32_t)tmp; |
1105 |
unimpl = 0; |
1106 |
break; |
1107 |
case COP0_ENTRYHI: |
1108 |
/* |
1109 |
* Translation caches must be invalidated, because the |
1110 |
* address space might change (if the ASID changes). |
1111 |
*/ |
1112 |
switch (cpu->cd.mips.cpu_type.mmu_model) { |
1113 |
case MMU3K: |
1114 |
old_asid = (cp->reg[COP0_ENTRYHI] & |
1115 |
R2K3K_ENTRYHI_ASID_MASK) >> |
1116 |
R2K3K_ENTRYHI_ASID_SHIFT; |
1117 |
if ((cp->reg[COP0_ENTRYHI] & |
1118 |
R2K3K_ENTRYHI_ASID_MASK) != |
1119 |
(tmp & R2K3K_ENTRYHI_ASID_MASK)) |
1120 |
inval = 1; |
1121 |
break; |
1122 |
default: |
1123 |
old_asid = cp->reg[COP0_ENTRYHI] & ENTRYHI_ASID; |
1124 |
if ((cp->reg[COP0_ENTRYHI] & ENTRYHI_ASID) != |
1125 |
(tmp & ENTRYHI_ASID)) |
1126 |
inval = 1; |
1127 |
break; |
1128 |
} |
1129 |
if (inval) |
1130 |
invalidate_translation_caches(cpu, 1, 0, 0, |
1131 |
old_asid); |
1132 |
unimpl = 0; |
1133 |
if (cpu->cd.mips.cpu_type.mmu_model == MMU3K && |
1134 |
(tmp & 0x3f)!=0) { |
1135 |
/* char *symbol; |
1136 |
uint64_t offset; |
1137 |
symbol = get_symbol_name(cpu-> |
1138 |
cd.mips.pc_last, &offset); |
1139 |
fatal("YO! pc = 0x%08llx <%s> " |
1140 |
"hi=%016llx\n", (long long)cpu-> |
1141 |
cd.mips.pc_last, symbol? symbol : |
1142 |
"no symbol", (long long)tmp); */ |
1143 |
tmp &= ~0x3f; |
1144 |
} |
1145 |
if (cpu->cd.mips.cpu_type.mmu_model == MMU3K) |
1146 |
tmp &= (R2K3K_ENTRYHI_VPN_MASK | |
1147 |
R2K3K_ENTRYHI_ASID_MASK); |
1148 |
else if (cpu->cd.mips.cpu_type.mmu_model == MMU10K) |
1149 |
tmp &= (ENTRYHI_R_MASK | |
1150 |
ENTRYHI_VPN2_MASK_R10K | ENTRYHI_ASID); |
1151 |
else if (cpu->cd.mips.cpu_type.rev == MIPS_R4100) |
1152 |
tmp &= (ENTRYHI_R_MASK | ENTRYHI_VPN2_MASK | |
1153 |
0x1800 | ENTRYHI_ASID); |
1154 |
else |
1155 |
tmp &= (ENTRYHI_R_MASK | ENTRYHI_VPN2_MASK | |
1156 |
ENTRYHI_ASID); |
1157 |
break; |
1158 |
case COP0_EPC: |
1159 |
unimpl = 0; |
1160 |
break; |
1161 |
case COP0_PRID: |
1162 |
readonly = 1; |
1163 |
break; |
1164 |
case COP0_CONFIG: |
1165 |
/* fatal("COP0_CONFIG: modifying K0 bits: " |
1166 |
"0x%08x => ", cp->reg[reg_nr]); */ |
1167 |
tmp = *ptr; |
1168 |
tmp &= 0x3; /* only bits 2..0 can be written */ |
1169 |
cp->reg[reg_nr] &= ~(0x3); cp->reg[reg_nr] |= tmp; |
1170 |
/* fatal("0x%08x\n", cp->reg[reg_nr]); */ |
1171 |
return; |
1172 |
case COP0_STATUS: |
1173 |
oldmode = cp->reg[COP0_STATUS]; |
1174 |
tmp &= ~(1 << 21); /* bit 21 is read-only */ |
1175 |
/* Changing from kernel to user mode? Then |
1176 |
invalidate some translation caches: */ |
1177 |
if (cpu->cd.mips.cpu_type.mmu_model == MMU3K) { |
1178 |
if (!(oldmode & MIPS1_SR_KU_CUR) |
1179 |
&& (tmp & MIPS1_SR_KU_CUR)) |
1180 |
invalidate_translation_caches(cpu, |
1181 |
0, 0, 1, 0); |
1182 |
} else { |
1183 |
/* TODO: don't hardcode */ |
1184 |
if ((oldmode & 0xff) != (tmp & 0xff)) |
1185 |
invalidate_translation_caches( |
1186 |
cpu, 0, 0, 1, 0); |
1187 |
} |
1188 |
unimpl = 0; |
1189 |
break; |
1190 |
case COP0_CAUSE: |
1191 |
/* A write to the cause register only |
1192 |
affects IM bits 0 and 1: */ |
1193 |
cp->reg[reg_nr] &= ~(0x3 << STATUS_IM_SHIFT); |
1194 |
cp->reg[reg_nr] |= (tmp & (0x3 << STATUS_IM_SHIFT)); |
1195 |
if (!(cp->reg[COP0_CAUSE] & STATUS_IM_MASK)) |
1196 |
cpu->cd.mips.cached_interrupt_is_possible = 0; |
1197 |
else |
1198 |
cpu->cd.mips.cached_interrupt_is_possible = 1; |
1199 |
return; |
1200 |
case COP0_FRAMEMASK: |
1201 |
/* TODO: R10000 */ |
1202 |
unimpl = 0; |
1203 |
break; |
1204 |
case COP0_TAGDATA_LO: |
1205 |
case COP0_TAGDATA_HI: |
1206 |
/* TODO: R4300 and others? */ |
1207 |
unimpl = 0; |
1208 |
break; |
1209 |
case COP0_LLADDR: |
1210 |
unimpl = 0; |
1211 |
break; |
1212 |
case COP0_WATCHLO: |
1213 |
case COP0_WATCHHI: |
1214 |
unimpl = 0; |
1215 |
break; |
1216 |
case COP0_XCONTEXT: |
1217 |
/* |
1218 |
* TODO: According to the R10000 manual, the R4400 |
1219 |
* shares the PTEbase portion of the context registers |
1220 |
* (that is, xcontext and context). On R10000, they |
1221 |
* are separate registers. |
1222 |
*/ |
1223 |
/* debug("[ xcontext 0x%016llx ]\n", tmp); */ |
1224 |
unimpl = 0; |
1225 |
break; |
1226 |
|
1227 |
/* Most of these are actually TODOs: */ |
1228 |
case COP0_ERROREPC: |
1229 |
case COP0_DEPC: |
1230 |
case COP0_RESERV22: /* Used by Linux on Linksys WRT54G */ |
1231 |
case COP0_DESAVE: |
1232 |
case COP0_PERFCNT: |
1233 |
case COP0_ERRCTL: /* R10000 */ |
1234 |
unimpl = 0; |
1235 |
break; |
1236 |
} |
1237 |
break; |
1238 |
|
1239 |
case 1: |
1240 |
/* COPROC 1: */ |
1241 |
unimpl = 0; |
1242 |
break; |
1243 |
} |
1244 |
|
1245 |
if (unimpl) { |
1246 |
fatal("cpu%i: warning: write to unimplemented coproc%i " |
1247 |
"register %i (%s), data = 0x%016llx\n", cpu->cpu_id, |
1248 |
cp->coproc_nr, reg_nr, cp->coproc_nr==0? |
1249 |
cop0_names[reg_nr] : "?", (long long)tmp); |
1250 |
|
1251 |
mips_cpu_exception(cpu, EXCEPTION_CPU, 0, 0, |
1252 |
cp->coproc_nr, 0, 0, 0); |
1253 |
return; |
1254 |
} |
1255 |
|
1256 |
if (readonly) { |
1257 |
fatal("cpu%i: warning: write to READONLY coproc%i register " |
1258 |
"%i ignored\n", cpu->cpu_id, cp->coproc_nr, reg_nr); |
1259 |
return; |
1260 |
} |
1261 |
|
1262 |
cp->reg[reg_nr] = tmp; |
1263 |
|
1264 |
if (!flag64) |
1265 |
cp->reg[reg_nr] = (int64_t)(int32_t)cp->reg[reg_nr]; |
1266 |
} |
1267 |
|
1268 |
|
1269 |
/* |
1270 |
* MIPS floating-point stuff: |
1271 |
* |
1272 |
* TODO: Move this to some other file? |
1273 |
*/ |
1274 |
#define FMT_S 16 |
1275 |
#define FMT_D 17 |
1276 |
#define FMT_W 20 |
1277 |
#define FMT_L 21 |
1278 |
#define FMT_PS 22 |
1279 |
|
1280 |
#define FPU_OP_ADD 1 |
1281 |
#define FPU_OP_SUB 2 |
1282 |
#define FPU_OP_MUL 3 |
1283 |
#define FPU_OP_DIV 4 |
1284 |
#define FPU_OP_SQRT 5 |
1285 |
#define FPU_OP_MOV 6 |
1286 |
#define FPU_OP_CVT 7 |
1287 |
#define FPU_OP_C 8 |
1288 |
#define FPU_OP_ABS 9 |
1289 |
#define FPU_OP_NEG 10 |
1290 |
/* TODO: CEIL.L, CEIL.W, FLOOR.L, FLOOR.W, RECIP, ROUND.L, ROUND.W, |
1291 |
RSQRT */ |
1292 |
|
1293 |
|
1294 |
struct internal_float_value { |
1295 |
double f; |
1296 |
int nan; |
1297 |
}; |
1298 |
|
1299 |
|
1300 |
/* |
1301 |
* fpu_interpret_float_value(): |
1302 |
* |
1303 |
* Interprets a float value from binary IEEE format into an |
1304 |
* internal_float_value struct. |
1305 |
*/ |
1306 |
static void fpu_interpret_float_value(uint64_t reg, |
1307 |
struct internal_float_value *fvp, int fmt) |
1308 |
{ |
1309 |
int n_frac = 0, n_exp = 0; |
1310 |
int i, nan, sign = 0, exponent; |
1311 |
double fraction; |
1312 |
|
1313 |
memset(fvp, 0, sizeof(struct internal_float_value)); |
1314 |
|
1315 |
/* n_frac and n_exp: */ |
1316 |
switch (fmt) { |
1317 |
case FMT_S: n_frac = 23; n_exp = 8; break; |
1318 |
case FMT_W: n_frac = 31; n_exp = 0; break; |
1319 |
case FMT_D: n_frac = 52; n_exp = 11; break; |
1320 |
case FMT_L: n_frac = 63; n_exp = 0; break; |
1321 |
default: |
1322 |
fatal("fpu_interpret_float_value(): " |
1323 |
"unimplemented format %i\n", fmt); |
1324 |
} |
1325 |
|
1326 |
/* exponent: */ |
1327 |
exponent = 0; |
1328 |
switch (fmt) { |
1329 |
case FMT_W: |
1330 |
reg &= 0xffffffffULL; |
1331 |
case FMT_L: |
1332 |
break; |
1333 |
case FMT_S: |
1334 |
reg &= 0xffffffffULL; |
1335 |
case FMT_D: |
1336 |
exponent = (reg >> n_frac) & ((1 << n_exp) - 1); |
1337 |
exponent -= (1 << (n_exp-1)) - 1; |
1338 |
break; |
1339 |
default: |
1340 |
fatal("fpu_interpret_float_value(): unimplemented " |
1341 |
"format %i\n", fmt); |
1342 |
} |
1343 |
|
1344 |
/* nan: */ |
1345 |
nan = 0; |
1346 |
switch (fmt) { |
1347 |
case FMT_S: |
1348 |
if (reg == 0x7fffffffULL || reg == 0x7fbfffffULL) |
1349 |
nan = 1; |
1350 |
break; |
1351 |
case FMT_D: |
1352 |
if (reg == 0x7fffffffffffffffULL || |
1353 |
reg == 0x7ff7ffffffffffffULL) |
1354 |
nan = 1; |
1355 |
break; |
1356 |
} |
1357 |
|
1358 |
if (nan) { |
1359 |
fvp->f = 1.0; |
1360 |
goto no_reasonable_result; |
1361 |
} |
1362 |
|
1363 |
/* fraction: */ |
1364 |
fraction = 0.0; |
1365 |
switch (fmt) { |
1366 |
case FMT_W: |
1367 |
{ |
1368 |
int32_t r_int = reg; |
1369 |
fraction = r_int; |
1370 |
} |
1371 |
break; |
1372 |
case FMT_L: |
1373 |
{ |
1374 |
int64_t r_int = reg; |
1375 |
fraction = r_int; |
1376 |
} |
1377 |
break; |
1378 |
case FMT_S: |
1379 |
case FMT_D: |
1380 |
/* sign: */ |
1381 |
sign = (reg >> 31) & 1; |
1382 |
if (fmt == FMT_D) |
1383 |
sign = (reg >> 63) & 1; |
1384 |
|
1385 |
fraction = 0.0; |
1386 |
for (i=0; i<n_frac; i++) { |
1387 |
int bit = (reg >> i) & 1; |
1388 |
fraction /= 2.0; |
1389 |
if (bit) |
1390 |
fraction += 1.0; |
1391 |
} |
1392 |
/* Add implicit bit 0: */ |
1393 |
fraction = (fraction / 2.0) + 1.0; |
1394 |
break; |
1395 |
default: |
1396 |
fatal("fpu_interpret_float_value(): " |
1397 |
"unimplemented format %i\n", fmt); |
1398 |
} |
1399 |
|
1400 |
/* form the value: */ |
1401 |
fvp->f = fraction; |
1402 |
|
1403 |
/* fatal("load reg=%016llx sign=%i exponent=%i fraction=%f ", |
1404 |
(long long)reg, sign, exponent, fraction); */ |
1405 |
|
1406 |
/* TODO: this is awful for exponents of large magnitude. */ |
1407 |
if (exponent > 0) { |
1408 |
/* |
1409 |
* NOTE / TODO: |
1410 |
* |
1411 |
* This is an ulgy workaround on Alpha, where it seems that |
1412 |
* multiplying by 2, 1024 times causes a floating point |
1413 |
* exception. (Triggered by running for example NetBSD/pmax |
1414 |
* 2.0 on an Alpha.) |
1415 |
*/ |
1416 |
if (exponent == 1024) |
1417 |
exponent = 1023; |
1418 |
|
1419 |
while (exponent-- > 0) |
1420 |
fvp->f *= 2.0; |
1421 |
} else if (exponent < 0) { |
1422 |
while (exponent++ < 0) |
1423 |
fvp->f /= 2.0; |
1424 |
} |
1425 |
|
1426 |
if (sign) |
1427 |
fvp->f = -fvp->f; |
1428 |
|
1429 |
no_reasonable_result: |
1430 |
fvp->nan = nan; |
1431 |
|
1432 |
/* fatal("f = %f\n", fvp->f); */ |
1433 |
} |
1434 |
|
1435 |
|
1436 |
/* |
1437 |
* fpu_store_float_value(): |
1438 |
* |
1439 |
* Stores a float value (actually a double) in fmt format. |
1440 |
*/ |
1441 |
static void fpu_store_float_value(struct mips_coproc *cp, int fd, |
1442 |
double nf, int fmt, int nan) |
1443 |
{ |
1444 |
int n_frac = 0, n_exp = 0, signofs=0; |
1445 |
int i, exponent; |
1446 |
uint64_t r = 0, r2; |
1447 |
int64_t r3; |
1448 |
|
1449 |
/* n_frac and n_exp: */ |
1450 |
switch (fmt) { |
1451 |
case FMT_S: n_frac = 23; n_exp = 8; signofs = 31; break; |
1452 |
case FMT_W: n_frac = 31; n_exp = 0; signofs = 31; break; |
1453 |
case FMT_D: n_frac = 52; n_exp = 11; signofs = 63; break; |
1454 |
case FMT_L: n_frac = 63; n_exp = 0; signofs = 63; break; |
1455 |
default: |
1456 |
fatal("fpu_store_float_value(): unimplemented format" |
1457 |
" %i\n", fmt); |
1458 |
} |
1459 |
|
1460 |
if ((fmt == FMT_S || fmt == FMT_D) && nan) |
1461 |
goto store_nan; |
1462 |
|
1463 |
/* fraction: */ |
1464 |
switch (fmt) { |
1465 |
case FMT_W: |
1466 |
case FMT_L: |
1467 |
/* |
1468 |
* This causes an implicit conversion of double to integer. |
1469 |
* If nf < 0.0, then r2 will begin with a sequence of binary |
1470 |
* 1's, which is ok. |
1471 |
*/ |
1472 |
r3 = nf; |
1473 |
r2 = r3; |
1474 |
r |= r2; |
1475 |
|
1476 |
if (fmt == FMT_W) |
1477 |
r &= 0xffffffffULL; |
1478 |
break; |
1479 |
case FMT_S: |
1480 |
case FMT_D: |
1481 |
/* fatal("store f=%f ", nf); */ |
1482 |
|
1483 |
/* sign bit: */ |
1484 |
if (nf < 0.0) { |
1485 |
r |= ((uint64_t)1 << signofs); |
1486 |
nf = -nf; |
1487 |
} |
1488 |
|
1489 |
/* |
1490 |
* How to convert back from double to exponent + fraction: |
1491 |
* We want fraction to be 1.xxx, that is |
1492 |
* 1.0 <= fraction < 2.0 |
1493 |
* |
1494 |
* This method is very slow but should work: |
1495 |
*/ |
1496 |
exponent = 0; |
1497 |
while (nf < 1.0 && exponent > -1023) { |
1498 |
nf *= 2.0; |
1499 |
exponent --; |
1500 |
} |
1501 |
while (nf >= 2.0 && exponent < 1023) { |
1502 |
nf /= 2.0; |
1503 |
exponent ++; |
1504 |
} |
1505 |
|
1506 |
/* Here: 1.0 <= nf < 2.0 */ |
1507 |
/* fatal(" nf=%f", nf); */ |
1508 |
nf -= 1.0; /* remove implicit first bit */ |
1509 |
for (i=n_frac-1; i>=0; i--) { |
1510 |
nf *= 2.0; |
1511 |
if (nf >= 1.0) { |
1512 |
r |= ((uint64_t)1 << i); |
1513 |
nf -= 1.0; |
1514 |
} |
1515 |
/* printf("\n i=%2i r=%016llx\n", i, (long long)r); */ |
1516 |
} |
1517 |
|
1518 |
/* Insert the exponent into the resulting word: */ |
1519 |
/* (First bias, then make sure it's within range) */ |
1520 |
exponent += (((uint64_t)1 << (n_exp-1)) - 1); |
1521 |
if (exponent < 0) |
1522 |
exponent = 0; |
1523 |
if (exponent >= ((int64_t)1 << n_exp)) |
1524 |
exponent = ((int64_t)1 << n_exp) - 1; |
1525 |
r |= (uint64_t)exponent << n_frac; |
1526 |
|
1527 |
/* Special case for 0.0: */ |
1528 |
if (exponent == 0) |
1529 |
r = 0; |
1530 |
|
1531 |
/* fatal(" exp=%i, r = %016llx\n", exponent, (long long)r); */ |
1532 |
|
1533 |
break; |
1534 |
default: |
1535 |
/* TODO */ |
1536 |
fatal("fpu_store_float_value(): unimplemented format " |
1537 |
"%i\n", fmt); |
1538 |
} |
1539 |
|
1540 |
store_nan: |
1541 |
if (nan) { |
1542 |
if (fmt == FMT_S) |
1543 |
r = 0x7fffffffULL; |
1544 |
else if (fmt == FMT_D) |
1545 |
r = 0x7fffffffffffffffULL; |
1546 |
else |
1547 |
r = 0x7fffffffULL; |
1548 |
} |
1549 |
|
1550 |
/* |
1551 |
* TODO: this is for 32-bit mode. It has to be updated later |
1552 |
* for 64-bit coprocessor stuff. |
1553 |
*/ |
1554 |
if (fmt == FMT_D || fmt == FMT_L) { |
1555 |
cp->reg[fd] = r & 0xffffffffULL; |
1556 |
cp->reg[(fd+1) & 31] = (r >> 32) & 0xffffffffULL; |
1557 |
|
1558 |
if (cp->reg[fd] & 0x80000000ULL) |
1559 |
cp->reg[fd] |= 0xffffffff00000000ULL; |
1560 |
if (cp->reg[fd+1] & 0x80000000ULL) |
1561 |
cp->reg[fd+1] |= 0xffffffff00000000ULL; |
1562 |
} else { |
1563 |
cp->reg[fd] = r & 0xffffffffULL; |
1564 |
|
1565 |
if (cp->reg[fd] & 0x80000000ULL) |
1566 |
cp->reg[fd] |= 0xffffffff00000000ULL; |
1567 |
} |
1568 |
} |
1569 |
|
1570 |
|
1571 |
/* |
1572 |
* fpu_op(): |
1573 |
* |
1574 |
* Perform a floating-point operation. For those of fs and ft |
1575 |
* that are >= 0, those numbers are interpreted into local |
1576 |
* variables. |
1577 |
* |
1578 |
* Only FPU_OP_C (compare) returns anything of interest, 1 for |
1579 |
* true, 0 for false. |
1580 |
*/ |
1581 |
static int fpu_op(struct cpu *cpu, struct mips_coproc *cp, int op, int fmt, |
1582 |
int ft, int fs, int fd, int cond, int output_fmt) |
1583 |
{ |
1584 |
/* Potentially two input registers, fs and ft */ |
1585 |
struct internal_float_value float_value[2]; |
1586 |
int unordered, nan; |
1587 |
uint64_t fs_v = 0; |
1588 |
double nf; |
1589 |
|
1590 |
if (fs >= 0) { |
1591 |
fs_v = cp->reg[fs]; |
1592 |
/* TODO: register-pair mode and plain |
1593 |
register mode? "FR" bit? */ |
1594 |
if (fmt == FMT_D || fmt == FMT_L) |
1595 |
fs_v = (fs_v & 0xffffffffULL) + |
1596 |
(cp->reg[(fs + 1) & 31] << 32); |
1597 |
fpu_interpret_float_value(fs_v, &float_value[0], fmt); |
1598 |
} |
1599 |
if (ft >= 0) { |
1600 |
uint64_t v = cp->reg[ft]; |
1601 |
/* TODO: register-pair mode and |
1602 |
plain register mode? "FR" bit? */ |
1603 |
if (fmt == FMT_D || fmt == FMT_L) |
1604 |
v = (v & 0xffffffffULL) + |
1605 |
(cp->reg[(ft + 1) & 31] << 32); |
1606 |
fpu_interpret_float_value(v, &float_value[1], fmt); |
1607 |
} |
1608 |
|
1609 |
switch (op) { |
1610 |
case FPU_OP_ADD: |
1611 |
nf = float_value[0].f + float_value[1].f; |
1612 |
/* debug(" add: %f + %f = %f\n", |
1613 |
float_value[0].f, float_value[1].f, nf); */ |
1614 |
fpu_store_float_value(cp, fd, nf, output_fmt, |
1615 |
float_value[0].nan || float_value[1].nan); |
1616 |
break; |
1617 |
case FPU_OP_SUB: |
1618 |
nf = float_value[0].f - float_value[1].f; |
1619 |
/* debug(" sub: %f - %f = %f\n", |
1620 |
float_value[0].f, float_value[1].f, nf); */ |
1621 |
fpu_store_float_value(cp, fd, nf, output_fmt, |
1622 |
float_value[0].nan || float_value[1].nan); |
1623 |
break; |
1624 |
case FPU_OP_MUL: |
1625 |
nf = float_value[0].f * float_value[1].f; |
1626 |
/* debug(" mul: %f * %f = %f\n", |
1627 |
float_value[0].f, float_value[1].f, nf); */ |
1628 |
fpu_store_float_value(cp, fd, nf, output_fmt, |
1629 |
float_value[0].nan || float_value[1].nan); |
1630 |
break; |
1631 |
case FPU_OP_DIV: |
1632 |
nan = float_value[0].nan || float_value[1].nan; |
1633 |
if (fabs(float_value[1].f) > 0.00000000001) |
1634 |
nf = float_value[0].f / float_value[1].f; |
1635 |
else { |
1636 |
fatal("DIV by zero !!!!\n"); |
1637 |
nf = 0.0; /* TODO */ |
1638 |
nan = 1; |
1639 |
} |
1640 |
/* debug(" div: %f / %f = %f\n", |
1641 |
float_value[0].f, float_value[1].f, nf); */ |
1642 |
fpu_store_float_value(cp, fd, nf, output_fmt, nan); |
1643 |
break; |
1644 |
case FPU_OP_SQRT: |
1645 |
nan = float_value[0].nan; |
1646 |
if (float_value[0].f >= 0.0) |
1647 |
nf = sqrt(float_value[0].f); |
1648 |
else { |
1649 |
fatal("SQRT by less than zero, %f !!!!\n", |
1650 |
float_value[0].f); |
1651 |
nf = 0.0; /* TODO */ |
1652 |
nan = 1; |
1653 |
} |
1654 |
/* debug(" sqrt: %f => %f\n", float_value[0].f, nf); */ |
1655 |
fpu_store_float_value(cp, fd, nf, output_fmt, nan); |
1656 |
break; |
1657 |
case FPU_OP_ABS: |
1658 |
nf = fabs(float_value[0].f); |
1659 |
/* debug(" abs: %f => %f\n", float_value[0].f, nf); */ |
1660 |
fpu_store_float_value(cp, fd, nf, output_fmt, |
1661 |
float_value[0].nan); |
1662 |
break; |
1663 |
case FPU_OP_NEG: |
1664 |
nf = - float_value[0].f; |
1665 |
/* debug(" neg: %f => %f\n", float_value[0].f, nf); */ |
1666 |
fpu_store_float_value(cp, fd, nf, output_fmt, |
1667 |
float_value[0].nan); |
1668 |
break; |
1669 |
case FPU_OP_CVT: |
1670 |
nf = float_value[0].f; |
1671 |
/* debug(" mov: %f => %f\n", float_value[0].f, nf); */ |
1672 |
fpu_store_float_value(cp, fd, nf, output_fmt, |
1673 |
float_value[0].nan); |
1674 |
break; |
1675 |
case FPU_OP_MOV: |
1676 |
/* Non-arithmetic move: */ |
1677 |
/* |
1678 |
* TODO: this is for 32-bit mode. It has to be updated later |
1679 |
* for 64-bit coprocessor stuff. |
1680 |
*/ |
1681 |
if (output_fmt == FMT_D || output_fmt == FMT_L) { |
1682 |
cp->reg[fd] = fs_v & 0xffffffffULL; |
1683 |
cp->reg[(fd+1) & 31] = (fs_v >> 32) & 0xffffffffULL; |
1684 |
if (cp->reg[fd] & 0x80000000ULL) |
1685 |
cp->reg[fd] |= 0xffffffff00000000ULL; |
1686 |
if (cp->reg[fd+1] & 0x80000000ULL) |
1687 |
cp->reg[fd+1] |= 0xffffffff00000000ULL; |
1688 |
} else { |
1689 |
cp->reg[fd] = fs_v & 0xffffffffULL; |
1690 |
if (cp->reg[fd] & 0x80000000ULL) |
1691 |
cp->reg[fd] |= 0xffffffff00000000ULL; |
1692 |
} |
1693 |
break; |
1694 |
case FPU_OP_C: |
1695 |
/* debug(" c: cond=%i\n", cond); */ |
1696 |
|
1697 |
unordered = 0; |
1698 |
if (float_value[0].nan || float_value[1].nan) |
1699 |
unordered = 1; |
1700 |
|
1701 |
switch (cond) { |
1702 |
case 2: /* Equal */ |
1703 |
return (float_value[0].f == float_value[1].f); |
1704 |
case 4: /* Ordered or Less than */ |
1705 |
return (float_value[0].f < float_value[1].f) |
1706 |
|| !unordered; |
1707 |
case 5: /* Unordered or Less than */ |
1708 |
return (float_value[0].f < float_value[1].f) |
1709 |
|| unordered; |
1710 |
case 6: /* Ordered or Less than or Equal */ |
1711 |
return (float_value[0].f <= float_value[1].f) |
1712 |
|| !unordered; |
1713 |
case 7: /* Unordered or Less than or Equal */ |
1714 |
return (float_value[0].f <= float_value[1].f) |
1715 |
|| unordered; |
1716 |
case 12:/* Less than */ |
1717 |
return (float_value[0].f < float_value[1].f); |
1718 |
case 14:/* Less than or equal */ |
1719 |
return (float_value[0].f <= float_value[1].f); |
1720 |
|
1721 |
/* The following are not commonly used, so I'll move these out |
1722 |
of the if-0 on a case-by-case basis. */ |
1723 |
#if 0 |
1724 |
case 0: return 0; /* False */ |
1725 |
case 1: return 0; /* Unordered */ |
1726 |
case 3: return (float_value[0].f == float_value[1].f); |
1727 |
/* Unordered or Equal */ |
1728 |
case 8: return 0; /* Signaling false */ |
1729 |
case 9: return 0; /* Not Greater than or Less than or Equal */ |
1730 |
case 10:return (float_value[0].f == float_value[1].f); /* Signaling Equal */ |
1731 |
case 11:return (float_value[0].f == float_value[1].f); /* Not Greater |
1732 |
than or Less than */ |
1733 |
case 13:return !(float_value[0].f >= float_value[1].f); /* Not greater |
1734 |
than or equal */ |
1735 |
case 15:return !(float_value[0].f > float_value[1].f); /* Not greater than */ |
1736 |
#endif |
1737 |
|
1738 |
default: |
1739 |
fatal("fpu_op(): unimplemented condition " |
1740 |
"code %i. see cpu_mips_coproc.c\n", cond); |
1741 |
} |
1742 |
break; |
1743 |
default: |
1744 |
fatal("fpu_op(): unimplemented op %i\n", op); |
1745 |
} |
1746 |
|
1747 |
return 0; |
1748 |
} |
1749 |
|
1750 |
|
1751 |
/* |
1752 |
* fpu_function(): |
1753 |
* |
1754 |
* Returns 1 if function was implemented, 0 otherwise. |
1755 |
* Debug trace should be printed for known instructions. |
1756 |
*/ |
1757 |
static int fpu_function(struct cpu *cpu, struct mips_coproc *cp, |
1758 |
uint32_t function, int unassemble_only) |
1759 |
{ |
1760 |
int fd, fs, ft, fmt, cond, cc; |
1761 |
|
1762 |
fmt = (function >> 21) & 31; |
1763 |
ft = (function >> 16) & 31; |
1764 |
fs = (function >> 11) & 31; |
1765 |
cc = (function >> 8) & 7; |
1766 |
fd = (function >> 6) & 31; |
1767 |
cond = (function >> 0) & 15; |
1768 |
|
1769 |
|
1770 |
/* bc1f, bc1t, bc1fl, bc1tl: */ |
1771 |
if ((function & 0x03e00000) == 0x01000000) { |
1772 |
int nd, tf, imm, cond_true; |
1773 |
char *instr_mnem; |
1774 |
|
1775 |
/* cc are bits 20..18: */ |
1776 |
cc = (function >> 18) & 7; |
1777 |
nd = (function >> 17) & 1; |
1778 |
tf = (function >> 16) & 1; |
1779 |
imm = function & 65535; |
1780 |
if (imm >= 32768) |
1781 |
imm -= 65536; |
1782 |
|
1783 |
instr_mnem = NULL; |
1784 |
if (nd == 0 && tf == 0) instr_mnem = "bc1f"; |
1785 |
if (nd == 0 && tf == 1) instr_mnem = "bc1t"; |
1786 |
if (nd == 1 && tf == 0) instr_mnem = "bc1fl"; |
1787 |
if (nd == 1 && tf == 1) instr_mnem = "bc1tl"; |
1788 |
|
1789 |
if (cpu->machine->instruction_trace || unassemble_only) |
1790 |
debug("%s\t%i,0x%016llx\n", instr_mnem, cc, |
1791 |
(long long) (cpu->pc + (imm << 2))); |
1792 |
if (unassemble_only) |
1793 |
return 1; |
1794 |
|
1795 |
if (cpu->cd.mips.delay_slot) { |
1796 |
fatal("%s: jump inside a jump's delay slot, " |
1797 |
"or similar. TODO\n", instr_mnem); |
1798 |
cpu->running = 0; |
1799 |
return 1; |
1800 |
} |
1801 |
|
1802 |
/* Both the FCCR and FCSR contain condition code bits... */ |
1803 |
if (cc == 0) |
1804 |
cond_true = (cp->fcr[FPU_FCSR] >> FCSR_FCC0_SHIFT) & 1; |
1805 |
else |
1806 |
cond_true = (cp->fcr[FPU_FCSR] >> |
1807 |
(FCSR_FCC1_SHIFT + cc-1)) & 1; |
1808 |
|
1809 |
if (!tf) |
1810 |
cond_true = !cond_true; |
1811 |
|
1812 |
if (cond_true) { |
1813 |
cpu->cd.mips.delay_slot = TO_BE_DELAYED; |
1814 |
cpu->cd.mips.delay_jmpaddr = cpu->pc + (imm << 2); |
1815 |
} else { |
1816 |
/* "likely": */ |
1817 |
if (nd) { |
1818 |
/* nullify the delay slot */ |
1819 |
cpu->cd.mips.nullify_next = 1; |
1820 |
} |
1821 |
} |
1822 |
|
1823 |
return 1; |
1824 |
} |
1825 |
|
1826 |
/* add.fmt: Floating-point add */ |
1827 |
if ((function & 0x0000003f) == 0x00000000) { |
1828 |
if (cpu->machine->instruction_trace || unassemble_only) |
1829 |
debug("add.%i\tr%i,r%i,r%i\n", fmt, fd, fs, ft); |
1830 |
if (unassemble_only) |
1831 |
return 1; |
1832 |
|
1833 |
fpu_op(cpu, cp, FPU_OP_ADD, fmt, ft, fs, fd, -1, fmt); |
1834 |
return 1; |
1835 |
} |
1836 |
|
1837 |
/* sub.fmt: Floating-point subtract */ |
1838 |
if ((function & 0x0000003f) == 0x00000001) { |
1839 |
if (cpu->machine->instruction_trace || unassemble_only) |
1840 |
debug("sub.%i\tr%i,r%i,r%i\n", fmt, fd, fs, ft); |
1841 |
if (unassemble_only) |
1842 |
return 1; |
1843 |
|
1844 |
fpu_op(cpu, cp, FPU_OP_SUB, fmt, ft, fs, fd, -1, fmt); |
1845 |
return 1; |
1846 |
} |
1847 |
|
1848 |
/* mul.fmt: Floating-point multiply */ |
1849 |
if ((function & 0x0000003f) == 0x00000002) { |
1850 |
if (cpu->machine->instruction_trace || unassemble_only) |
1851 |
debug("mul.%i\tr%i,r%i,r%i\n", fmt, fd, fs, ft); |
1852 |
if (unassemble_only) |
1853 |
return 1; |
1854 |
|
1855 |
fpu_op(cpu, cp, FPU_OP_MUL, fmt, ft, fs, fd, -1, fmt); |
1856 |
return 1; |
1857 |
} |
1858 |
|
1859 |
/* div.fmt: Floating-point divide */ |
1860 |
if ((function & 0x0000003f) == 0x00000003) { |
1861 |
if (cpu->machine->instruction_trace || unassemble_only) |
1862 |
debug("div.%i\tr%i,r%i,r%i\n", fmt, fd, fs, ft); |
1863 |
if (unassemble_only) |
1864 |
return 1; |
1865 |
|
1866 |
fpu_op(cpu, cp, FPU_OP_DIV, fmt, ft, fs, fd, -1, fmt); |
1867 |
return 1; |
1868 |
} |
1869 |
|
1870 |
/* sqrt.fmt: Floating-point square-root */ |
1871 |
if ((function & 0x001f003f) == 0x00000004) { |
1872 |
if (cpu->machine->instruction_trace || unassemble_only) |
1873 |
debug("sqrt.%i\tr%i,r%i\n", fmt, fd, fs); |
1874 |
if (unassemble_only) |
1875 |
return 1; |
1876 |
|
1877 |
fpu_op(cpu, cp, FPU_OP_SQRT, fmt, -1, fs, fd, -1, fmt); |
1878 |
return 1; |
1879 |
} |
1880 |
|
1881 |
/* abs.fmt: Floating-point absolute value */ |
1882 |
if ((function & 0x001f003f) == 0x00000005) { |
1883 |
if (cpu->machine->instruction_trace || unassemble_only) |
1884 |
debug("abs.%i\tr%i,r%i\n", fmt, fd, fs); |
1885 |
if (unassemble_only) |
1886 |
return 1; |
1887 |
|
1888 |
fpu_op(cpu, cp, FPU_OP_ABS, fmt, -1, fs, fd, -1, fmt); |
1889 |
return 1; |
1890 |
} |
1891 |
|
1892 |
/* mov.fmt: Floating-point (non-arithmetic) move */ |
1893 |
if ((function & 0x0000003f) == 0x00000006) { |
1894 |
if (cpu->machine->instruction_trace || unassemble_only) |
1895 |
debug("mov.%i\tr%i,r%i\n", fmt, fd, fs); |
1896 |
if (unassemble_only) |
1897 |
return 1; |
1898 |
|
1899 |
fpu_op(cpu, cp, FPU_OP_MOV, fmt, -1, fs, fd, -1, fmt); |
1900 |
return 1; |
1901 |
} |
1902 |
|
1903 |
/* neg.fmt: Floating-point negate */ |
1904 |
if ((function & 0x001f003f) == 0x00000007) { |
1905 |
if (cpu->machine->instruction_trace || unassemble_only) |
1906 |
debug("neg.%i\tr%i,r%i\n", fmt, fd, fs); |
1907 |
if (unassemble_only) |
1908 |
return 1; |
1909 |
|
1910 |
fpu_op(cpu, cp, FPU_OP_NEG, fmt, -1, fs, fd, -1, fmt); |
1911 |
return 1; |
1912 |
} |
1913 |
|
1914 |
/* trunc.l.fmt: Truncate */ |
1915 |
if ((function & 0x001f003f) == 0x00000009) { |
1916 |
if (cpu->machine->instruction_trace || unassemble_only) |
1917 |
debug("trunc.l.%i\tr%i,r%i\n", fmt, fd, fs); |
1918 |
if (unassemble_only) |
1919 |
return 1; |
1920 |
|
1921 |
/* TODO: not CVT? */ |
1922 |
|
1923 |
fpu_op(cpu, cp, FPU_OP_CVT, fmt, -1, fs, fd, -1, FMT_L); |
1924 |
return 1; |
1925 |
} |
1926 |
|
1927 |
/* trunc.w.fmt: Truncate */ |
1928 |
if ((function & 0x001f003f) == 0x0000000d) { |
1929 |
if (cpu->machine->instruction_trace || unassemble_only) |
1930 |
debug("trunc.w.%i\tr%i,r%i\n", fmt, fd, fs); |
1931 |
if (unassemble_only) |
1932 |
return 1; |
1933 |
|
1934 |
/* TODO: not CVT? */ |
1935 |
|
1936 |
fpu_op(cpu, cp, FPU_OP_CVT, fmt, -1, fs, fd, -1, FMT_W); |
1937 |
return 1; |
1938 |
} |
1939 |
|
1940 |
/* c.cond.fmt: Floating-point compare */ |
1941 |
if ((function & 0x000000f0) == 0x00000030) { |
1942 |
int cond_true; |
1943 |
int bit; |
1944 |
|
1945 |
if (cpu->machine->instruction_trace || unassemble_only) |
1946 |
debug("c.%i.%i\tr%i,r%i,r%i\n", cond, fmt, cc, fs, ft); |
1947 |
if (unassemble_only) |
1948 |
return 1; |
1949 |
|
1950 |
cond_true = fpu_op(cpu, cp, FPU_OP_C, fmt, |
1951 |
ft, fs, -1, cond, fmt); |
1952 |
|
1953 |
/* |
1954 |
* Both the FCCR and FCSR contain condition code bits: |
1955 |
* FCCR: bits 7..0 |
1956 |
* FCSR: bits 31..25 and 23 |
1957 |
*/ |
1958 |
cp->fcr[FPU_FCCR] &= ~(1 << cc); |
1959 |
if (cond_true) |
1960 |
cp->fcr[FPU_FCCR] |= (1 << cc); |
1961 |
|
1962 |
if (cc == 0) { |
1963 |
bit = 1 << FCSR_FCC0_SHIFT; |
1964 |
cp->fcr[FPU_FCSR] &= ~bit; |
1965 |
if (cond_true) |
1966 |
cp->fcr[FPU_FCSR] |= bit; |
1967 |
} else { |
1968 |
bit = 1 << (FCSR_FCC1_SHIFT + cc-1); |
1969 |
cp->fcr[FPU_FCSR] &= ~bit; |
1970 |
if (cond_true) |
1971 |
cp->fcr[FPU_FCSR] |= bit; |
1972 |
} |
1973 |
|
1974 |
return 1; |
1975 |
} |
1976 |
|
1977 |
/* cvt.s.fmt: Convert to single floating-point */ |
1978 |
if ((function & 0x001f003f) == 0x00000020) { |
1979 |
if (cpu->machine->instruction_trace || unassemble_only) |
1980 |
debug("cvt.s.%i\tr%i,r%i\n", fmt, fd, fs); |
1981 |
if (unassemble_only) |
1982 |
return 1; |
1983 |
|
1984 |
fpu_op(cpu, cp, FPU_OP_CVT, fmt, -1, fs, fd, -1, FMT_S); |
1985 |
return 1; |
1986 |
} |
1987 |
|
1988 |
/* cvt.d.fmt: Convert to double floating-point */ |
1989 |
if ((function & 0x001f003f) == 0x00000021) { |
1990 |
if (cpu->machine->instruction_trace || unassemble_only) |
1991 |
debug("cvt.d.%i\tr%i,r%i\n", fmt, fd, fs); |
1992 |
if (unassemble_only) |
1993 |
return 1; |
1994 |
|
1995 |
fpu_op(cpu, cp, FPU_OP_CVT, fmt, -1, fs, fd, -1, FMT_D); |
1996 |
return 1; |
1997 |
} |
1998 |
|
1999 |
/* cvt.w.fmt: Convert to word fixed-point */ |
2000 |
if ((function & 0x001f003f) == 0x00000024) { |
2001 |
if (cpu->machine->instruction_trace || unassemble_only) |
2002 |
debug("cvt.w.%i\tr%i,r%i\n", fmt, fd, fs); |
2003 |
if (unassemble_only) |
2004 |
return 1; |
2005 |
|
2006 |
fpu_op(cpu, cp, FPU_OP_CVT, fmt, -1, fs, fd, -1, FMT_W); |
2007 |
return 1; |
2008 |
} |
2009 |
|
2010 |
return 0; |
2011 |
} |
2012 |
|
2013 |
|
2014 |
/* |
2015 |
* coproc_tlbpr(): |
2016 |
* |
2017 |
* 'tlbp' and 'tlbr'. |
2018 |
*/ |
2019 |
void coproc_tlbpr(struct cpu *cpu, int readflag) |
2020 |
{ |
2021 |
struct mips_coproc *cp = cpu->cd.mips.coproc[0]; |
2022 |
int i, found, g_bit; |
2023 |
uint64_t vpn2, xmask; |
2024 |
|
2025 |
/* Read: */ |
2026 |
if (readflag) { |
2027 |
if (cpu->cd.mips.cpu_type.mmu_model == MMU3K) { |
2028 |
i = (cp->reg[COP0_INDEX] & R2K3K_INDEX_MASK) >> |
2029 |
R2K3K_INDEX_SHIFT; |
2030 |
if (i >= cp->nr_of_tlbs) { |
2031 |
/* TODO: exception? */ |
2032 |
fatal("warning: tlbr from index %i (too " |
2033 |
"high)\n", i); |
2034 |
return; |
2035 |
} |
2036 |
|
2037 |
/* |
2038 |
* TODO: Hm. Earlier I had an & ~0x3f on the high |
2039 |
* assignment and an & ~0xff on the lo0 assignment. |
2040 |
* I wonder why. |
2041 |
*/ |
2042 |
|
2043 |
cp->reg[COP0_ENTRYHI] = cp->tlbs[i].hi; /* & ~0x3f; */ |
2044 |
cp->reg[COP0_ENTRYLO0] = cp->tlbs[i].lo0;/* & ~0xff; */ |
2045 |
} else { |
2046 |
/* R4000: */ |
2047 |
i = cp->reg[COP0_INDEX] & INDEX_MASK; |
2048 |
if (i >= cp->nr_of_tlbs) /* TODO: exception */ |
2049 |
return; |
2050 |
|
2051 |
cp->reg[COP0_PAGEMASK] = cp->tlbs[i].mask; |
2052 |
cp->reg[COP0_ENTRYHI] = cp->tlbs[i].hi; |
2053 |
cp->reg[COP0_ENTRYLO1] = cp->tlbs[i].lo1; |
2054 |
cp->reg[COP0_ENTRYLO0] = cp->tlbs[i].lo0; |
2055 |
|
2056 |
if (cpu->cd.mips.cpu_type.rev == MIPS_R4100) { |
2057 |
/* R4100 don't have the G bit in entryhi */ |
2058 |
} else { |
2059 |
/* R4000 etc: */ |
2060 |
cp->reg[COP0_ENTRYHI] &= ~TLB_G; |
2061 |
g_bit = cp->tlbs[i].hi & TLB_G; |
2062 |
|
2063 |
cp->reg[COP0_ENTRYLO0] &= ~ENTRYLO_G; |
2064 |
cp->reg[COP0_ENTRYLO1] &= ~ENTRYLO_G; |
2065 |
if (g_bit) { |
2066 |
cp->reg[COP0_ENTRYLO0] |= ENTRYLO_G; |
2067 |
cp->reg[COP0_ENTRYLO1] |= ENTRYLO_G; |
2068 |
} |
2069 |
} |
2070 |
} |
2071 |
|
2072 |
return; |
2073 |
} |
2074 |
|
2075 |
/* Probe: */ |
2076 |
if (cpu->cd.mips.cpu_type.mmu_model == MMU3K) { |
2077 |
vpn2 = cp->reg[COP0_ENTRYHI] & R2K3K_ENTRYHI_VPN_MASK; |
2078 |
found = -1; |
2079 |
for (i=0; i<cp->nr_of_tlbs; i++) |
2080 |
if ( ((cp->tlbs[i].hi & R2K3K_ENTRYHI_ASID_MASK) == |
2081 |
(cp->reg[COP0_ENTRYHI] & R2K3K_ENTRYHI_ASID_MASK)) |
2082 |
|| cp->tlbs[i].lo0 & R2K3K_ENTRYLO_G) |
2083 |
if ((cp->tlbs[i].hi & R2K3K_ENTRYHI_VPN_MASK) |
2084 |
== vpn2) { |
2085 |
found = i; |
2086 |
break; |
2087 |
} |
2088 |
} else { |
2089 |
/* R4000 and R10000: */ |
2090 |
if (cpu->cd.mips.cpu_type.mmu_model == MMU10K) |
2091 |
xmask = ENTRYHI_R_MASK | ENTRYHI_VPN2_MASK_R10K; |
2092 |
else if (cpu->cd.mips.cpu_type.rev == MIPS_R4100) |
2093 |
xmask = ENTRYHI_R_MASK | ENTRYHI_VPN2_MASK | 0x1800; |
2094 |
else |
2095 |
xmask = ENTRYHI_R_MASK | ENTRYHI_VPN2_MASK; |
2096 |
vpn2 = cp->reg[COP0_ENTRYHI] & xmask; |
2097 |
found = -1; |
2098 |
for (i=0; i<cp->nr_of_tlbs; i++) { |
2099 |
int gbit = cp->tlbs[i].hi & TLB_G; |
2100 |
if (cpu->cd.mips.cpu_type.rev == MIPS_R4100) |
2101 |
gbit = (cp->tlbs[i].lo0 & ENTRYLO_G) && |
2102 |
(cp->tlbs[i].lo1 & ENTRYLO_G); |
2103 |
|
2104 |
if ( ((cp->tlbs[i].hi & ENTRYHI_ASID) == |
2105 |
(cp->reg[COP0_ENTRYHI] & ENTRYHI_ASID)) || gbit) { |
2106 |
uint64_t a = vpn2 & ~cp->tlbs[i].mask; |
2107 |
uint64_t b = (cp->tlbs[i].hi & xmask) & |
2108 |
~cp->tlbs[i].mask; |
2109 |
if (a == b) { |
2110 |
found = i; |
2111 |
break; |
2112 |
} |
2113 |
} |
2114 |
} |
2115 |
} |
2116 |
if (found == -1) |
2117 |
cp->reg[COP0_INDEX] = INDEX_P; |
2118 |
else { |
2119 |
if (cpu->cd.mips.cpu_type.mmu_model == MMU3K) |
2120 |
cp->reg[COP0_INDEX] = found << R2K3K_INDEX_SHIFT; |
2121 |
else |
2122 |
cp->reg[COP0_INDEX] = found; |
2123 |
} |
2124 |
|
2125 |
/* Sign extend the index register: */ |
2126 |
if ((cp->reg[COP0_INDEX] >> 32) == 0 && |
2127 |
cp->reg[COP0_INDEX] & 0x80000000) |
2128 |
cp->reg[COP0_INDEX] |= |
2129 |
0xffffffff00000000ULL; |
2130 |
} |
2131 |
|
2132 |
|
2133 |
/* |
2134 |
* coproc_tlbwri(): |
2135 |
* |
2136 |
* 'tlbwr' and 'tlbwi' |
2137 |
*/ |
2138 |
void coproc_tlbwri(struct cpu *cpu, int randomflag) |
2139 |
{ |
2140 |
struct mips_coproc *cp = cpu->cd.mips.coproc[0]; |
2141 |
int index, g_bit; |
2142 |
uint64_t oldvaddr; |
2143 |
int old_asid = -1; |
2144 |
|
2145 |
/* |
2146 |
* ... and the last instruction page: |
2147 |
* |
2148 |
* Some thoughts about this: Code running in |
2149 |
* the kernel's physical address space has the |
2150 |
* same vaddr->paddr translation, so the last |
2151 |
* virtual page invalidation only needs to |
2152 |
* happen if we are for some extremely weird |
2153 |
* reason NOT running in the kernel's physical |
2154 |
* address space. |
2155 |
* |
2156 |
* (An even insaner (but probably useless) |
2157 |
* optimization would be to only invalidate |
2158 |
* the last virtual page stuff if the TLB |
2159 |
* update actually affects the vaddr in |
2160 |
* question.) |
2161 |
*/ |
2162 |
|
2163 |
if (cpu->pc < (uint64_t)0xffffffff80000000ULL || |
2164 |
cpu->pc >= (uint64_t)0xffffffffc0000000ULL) |
2165 |
cpu->cd.mips.pc_last_virtual_page = |
2166 |
PC_LAST_PAGE_IMPOSSIBLE_VALUE; |
2167 |
|
2168 |
if (randomflag) { |
2169 |
if (cpu->cd.mips.cpu_type.mmu_model == MMU3K) |
2170 |
index = (cp->reg[COP0_RANDOM] & R2K3K_RANDOM_MASK) |
2171 |
>> R2K3K_RANDOM_SHIFT; |
2172 |
else |
2173 |
index = cp->reg[COP0_RANDOM] & RANDOM_MASK; |
2174 |
} else { |
2175 |
if (cpu->cd.mips.cpu_type.mmu_model == MMU3K) |
2176 |
index = (cp->reg[COP0_INDEX] & R2K3K_INDEX_MASK) |
2177 |
>> R2K3K_INDEX_SHIFT; |
2178 |
else |
2179 |
index = cp->reg[COP0_INDEX] & INDEX_MASK; |
2180 |
} |
2181 |
|
2182 |
if (index >= cp->nr_of_tlbs) { |
2183 |
fatal("warning: tlb index %i too high (max is %i)\n", |
2184 |
index, cp->nr_of_tlbs - 1); |
2185 |
/* TODO: cause an exception? */ |
2186 |
return; |
2187 |
} |
2188 |
|
2189 |
#if 0 |
2190 |
/* Debug dump of the previous entry at that index: */ |
2191 |
debug(" old entry at index = %04x", index); |
2192 |
debug(" mask = %016llx", (long long) cp->tlbs[index].mask); |
2193 |
debug(" hi = %016llx", (long long) cp->tlbs[index].hi); |
2194 |
debug(" lo0 = %016llx", (long long) cp->tlbs[index].lo0); |
2195 |
debug(" lo1 = %016llx\n", (long long) cp->tlbs[index].lo1); |
2196 |
#endif |
2197 |
|
2198 |
/* Translation caches must be invalidated: */ |
2199 |
switch (cpu->cd.mips.cpu_type.mmu_model) { |
2200 |
case MMU3K: |
2201 |
oldvaddr = cp->tlbs[index].hi & R2K3K_ENTRYHI_VPN_MASK; |
2202 |
oldvaddr &= 0xffffffffULL; |
2203 |
if (oldvaddr & 0x80000000ULL) |
2204 |
oldvaddr |= 0xffffffff00000000ULL; |
2205 |
old_asid = (cp->tlbs[index].hi & R2K3K_ENTRYHI_ASID_MASK) |
2206 |
>> R2K3K_ENTRYHI_ASID_SHIFT; |
2207 |
|
2208 |
/* TODO: Bug? Why does this if need to be commented out? */ |
2209 |
|
2210 |
/* if (cp->tlbs[index].lo0 & ENTRYLO_V) */ |
2211 |
invalidate_translation_caches(cpu, 0, oldvaddr, 0, 0); |
2212 |
break; |
2213 |
default: |
2214 |
if (cpu->cd.mips.cpu_type.mmu_model == MMU10K) { |
2215 |
oldvaddr = cp->tlbs[index].hi & ENTRYHI_VPN2_MASK_R10K; |
2216 |
/* 44 addressable bits: */ |
2217 |
if (oldvaddr & 0x80000000000ULL) |
2218 |
oldvaddr |= 0xfffff00000000000ULL; |
2219 |
} else { |
2220 |
/* Assume MMU4K */ |
2221 |
oldvaddr = cp->tlbs[index].hi & ENTRYHI_VPN2_MASK; |
2222 |
/* 40 addressable bits: */ |
2223 |
if (oldvaddr & 0x8000000000ULL) |
2224 |
oldvaddr |= 0xffffff0000000000ULL; |
2225 |
} |
2226 |
|
2227 |
/* |
2228 |
* Both pages: |
2229 |
* |
2230 |
* TODO: non-4KB page sizes! |
2231 |
*/ |
2232 |
invalidate_translation_caches( |
2233 |
cpu, 0, oldvaddr & ~0x1fff, 0, 0); |
2234 |
invalidate_translation_caches( |
2235 |
cpu, 0, (oldvaddr & ~0x1fff) | 0x1000, 0, 0); |
2236 |
} |
2237 |
|
2238 |
|
2239 |
/* Write the new entry: */ |
2240 |
|
2241 |
if (cpu->cd.mips.cpu_type.mmu_model == MMU3K) { |
2242 |
uint64_t vaddr, paddr; |
2243 |
int wf = cp->reg[COP0_ENTRYLO0] & R2K3K_ENTRYLO_D? 1 : 0; |
2244 |
unsigned char *memblock = NULL; |
2245 |
|
2246 |
cp->tlbs[index].hi = cp->reg[COP0_ENTRYHI]; |
2247 |
cp->tlbs[index].lo0 = cp->reg[COP0_ENTRYLO0]; |
2248 |
|
2249 |
vaddr = cp->reg[COP0_ENTRYHI] & R2K3K_ENTRYHI_VPN_MASK; |
2250 |
paddr = cp->reg[COP0_ENTRYLO0] & R2K3K_ENTRYLO_PFN_MASK; |
2251 |
|
2252 |
/* TODO: This is ugly. */ |
2253 |
if (paddr < 0x10000000) |
2254 |
memblock = memory_paddr_to_hostaddr( |
2255 |
cpu->mem, paddr, 1); |
2256 |
|
2257 |
if (memblock != NULL && |
2258 |
cp->reg[COP0_ENTRYLO0] & R2K3K_ENTRYLO_V) { |
2259 |
memblock += (paddr & ((1 << BITS_PER_PAGETABLE) - 1)); |
2260 |
|
2261 |
/* |
2262 |
* TODO: Hahaha, this is even uglier than the thing |
2263 |
* above. Some OSes seem to map code pages read/write, |
2264 |
* which causes the bintrans cache to be invalidated |
2265 |
* even when it doesn't have to be. |
2266 |
*/ |
2267 |
/* if (vaddr < 0x10000000) */ |
2268 |
wf = 0; |
2269 |
|
2270 |
update_translation_table(cpu, vaddr, memblock, |
2271 |
wf, paddr); |
2272 |
} |
2273 |
} else { |
2274 |
/* R4000: */ |
2275 |
g_bit = (cp->reg[COP0_ENTRYLO0] & |
2276 |
cp->reg[COP0_ENTRYLO1]) & ENTRYLO_G; |
2277 |
cp->tlbs[index].mask = cp->reg[COP0_PAGEMASK]; |
2278 |
cp->tlbs[index].hi = cp->reg[COP0_ENTRYHI]; |
2279 |
cp->tlbs[index].lo1 = cp->reg[COP0_ENTRYLO1]; |
2280 |
cp->tlbs[index].lo0 = cp->reg[COP0_ENTRYLO0]; |
2281 |
|
2282 |
if (cpu->cd.mips.cpu_type.rev == MIPS_R4100) { |
2283 |
/* NOTE: The VR4131 (and possibly others) don't have |
2284 |
a Global bit in entryhi */ |
2285 |
cp->tlbs[index].hi &= ~cp->reg[COP0_PAGEMASK]; |
2286 |
} else { |
2287 |
cp->tlbs[index].lo0 &= ~ENTRYLO_G; |
2288 |
cp->tlbs[index].lo1 &= ~ENTRYLO_G; |
2289 |
|
2290 |
cp->tlbs[index].hi &= ~TLB_G; |
2291 |
if (g_bit) |
2292 |
cp->tlbs[index].hi |= TLB_G; |
2293 |
} |
2294 |
} |
2295 |
|
2296 |
if (randomflag) { |
2297 |
if (cpu->cd.mips.cpu_type.exc_model == EXC3K) { |
2298 |
cp->reg[COP0_RANDOM] = |
2299 |
((random() % (cp->nr_of_tlbs - 8)) + 8) |
2300 |
<< R2K3K_RANDOM_SHIFT; |
2301 |
} else { |
2302 |
cp->reg[COP0_RANDOM] = cp->reg[COP0_WIRED] + (random() |
2303 |
% (cp->nr_of_tlbs - cp->reg[COP0_WIRED])); |
2304 |
} |
2305 |
} |
2306 |
} |
2307 |
|
2308 |
|
2309 |
/* |
2310 |
* coproc_rfe(): |
2311 |
* |
2312 |
* Return from exception. (R3000 etc.) |
2313 |
*/ |
2314 |
void coproc_rfe(struct cpu *cpu) |
2315 |
{ |
2316 |
int oldmode; |
2317 |
|
2318 |
oldmode = cpu->cd.mips.coproc[0]->reg[COP0_STATUS] & MIPS1_SR_KU_CUR; |
2319 |
|
2320 |
cpu->cd.mips.coproc[0]->reg[COP0_STATUS] = |
2321 |
(cpu->cd.mips.coproc[0]->reg[COP0_STATUS] & ~0x3f) | |
2322 |
((cpu->cd.mips.coproc[0]->reg[COP0_STATUS] & 0x3c) >> 2); |
2323 |
|
2324 |
/* Changing from kernel to user mode? Then this is necessary: */ |
2325 |
if (!oldmode && |
2326 |
(cpu->cd.mips.coproc[0]->reg[COP0_STATUS] & |
2327 |
MIPS1_SR_KU_CUR)) |
2328 |
invalidate_translation_caches(cpu, 0, 0, 1, 0); |
2329 |
} |
2330 |
|
2331 |
|
2332 |
/* |
2333 |
* coproc_eret(): |
2334 |
* |
2335 |
* Return from exception. (R4000 etc.) |
2336 |
*/ |
2337 |
void coproc_eret(struct cpu *cpu) |
2338 |
{ |
2339 |
int oldmode, newmode; |
2340 |
|
2341 |
/* Kernel mode flag: */ |
2342 |
oldmode = 0; |
2343 |
if ((cpu->cd.mips.coproc[0]->reg[COP0_STATUS] & MIPS3_SR_KSU_MASK) |
2344 |
!= MIPS3_SR_KSU_USER |
2345 |
|| (cpu->cd.mips.coproc[0]->reg[COP0_STATUS] & (STATUS_EXL | |
2346 |
STATUS_ERL)) || |
2347 |
(cpu->cd.mips.coproc[0]->reg[COP0_STATUS] & 1) == 0) |
2348 |
oldmode = 1; |
2349 |
|
2350 |
if (cpu->cd.mips.coproc[0]->reg[COP0_STATUS] & STATUS_ERL) { |
2351 |
cpu->pc = cpu->cd.mips.pc_last = |
2352 |
cpu->cd.mips.coproc[0]->reg[COP0_ERROREPC]; |
2353 |
cpu->cd.mips.coproc[0]->reg[COP0_STATUS] &= ~STATUS_ERL; |
2354 |
} else { |
2355 |
cpu->pc = cpu->cd.mips.pc_last = |
2356 |
cpu->cd.mips.coproc[0]->reg[COP0_EPC]; |
2357 |
cpu->cd.mips.delay_slot = 0; |
2358 |
cpu->cd.mips.coproc[0]->reg[COP0_STATUS] &= ~STATUS_EXL; |
2359 |
} |
2360 |
|
2361 |
cpu->cd.mips.rmw = 0; /* the "LL bit" */ |
2362 |
|
2363 |
/* New kernel mode flag: */ |
2364 |
newmode = 0; |
2365 |
if ((cpu->cd.mips.coproc[0]->reg[COP0_STATUS] & MIPS3_SR_KSU_MASK) |
2366 |
!= MIPS3_SR_KSU_USER |
2367 |
|| (cpu->cd.mips.coproc[0]->reg[COP0_STATUS] & (STATUS_EXL | |
2368 |
STATUS_ERL)) || |
2369 |
(cpu->cd.mips.coproc[0]->reg[COP0_STATUS] & 1) == 0) |
2370 |
newmode = 1; |
2371 |
|
2372 |
/* Changing from kernel to user mode? |
2373 |
Then this is necessary: TODO */ |
2374 |
if (oldmode && !newmode) |
2375 |
invalidate_translation_caches(cpu, 0, 0, 1, 0); |
2376 |
} |
2377 |
|
2378 |
|
2379 |
/* |
2380 |
* coproc_function(): |
2381 |
* |
2382 |
* Execute a coprocessor specific instruction. cp must be != NULL. |
2383 |
* Debug trace should be printed for known instructions, if |
2384 |
* unassemble_only is non-zero. (This will NOT execute the instruction.) |
2385 |
* |
2386 |
* TODO: This is a mess and should be restructured (again). |
2387 |
*/ |
2388 |
void coproc_function(struct cpu *cpu, struct mips_coproc *cp, int cpnr, |
2389 |
uint32_t function, int unassemble_only, int running) |
2390 |
{ |
2391 |
int co_bit, op, rt, rd, fs, copz; |
2392 |
uint64_t tmpvalue; |
2393 |
|
2394 |
if (cp == NULL) { |
2395 |
if (unassemble_only) { |
2396 |
debug("cop%i\t0x%08x (coprocessor not available)\n", |
2397 |
cpnr, (int)function); |
2398 |
return; |
2399 |
} |
2400 |
fatal("[ pc=0x%016llx cop%i\t0x%08x (coprocessor not " |
2401 |
"available)\n", (long long)cpu->pc, cpnr, (int)function); |
2402 |
return; |
2403 |
} |
2404 |
|
2405 |
#if 0 |
2406 |
/* No FPU? */ |
2407 |
if (cpnr == 1 && (cpu->cd.mips.cpu_type.flags & NOFPU)) { |
2408 |
mips_cpu_exception(cpu, EXCEPTION_CPU, 0, 0, cpnr, 0, 0, 0); |
2409 |
return; |
2410 |
} |
2411 |
#endif |
2412 |
|
2413 |
/* For quick reference: */ |
2414 |
copz = (function >> 21) & 31; |
2415 |
rt = (function >> 16) & 31; |
2416 |
rd = (function >> 11) & 31; |
2417 |
|
2418 |
if (cpnr < 2 && (((function & 0x03e007f8) == (COPz_MFCz << 21)) |
2419 |
|| ((function & 0x03e007f8) == (COPz_DMFCz << 21)))) { |
2420 |
if (unassemble_only) { |
2421 |
debug("%s%i\t%s,%s\n", |
2422 |
copz==COPz_DMFCz? "dmfc" : "mfc", cpnr, |
2423 |
regnames[rt], cop0_names[rd]); |
2424 |
return; |
2425 |
} |
2426 |
coproc_register_read(cpu, cpu->cd.mips.coproc[cpnr], |
2427 |
rd, &tmpvalue); |
2428 |
cpu->cd.mips.gpr[rt] = tmpvalue; |
2429 |
if (copz == COPz_MFCz) { |
2430 |
/* Sign-extend: */ |
2431 |
cpu->cd.mips.gpr[rt] &= 0xffffffffULL; |
2432 |
if (cpu->cd.mips.gpr[rt] & 0x80000000ULL) |
2433 |
cpu->cd.mips.gpr[rt] |= 0xffffffff00000000ULL; |
2434 |
} |
2435 |
return; |
2436 |
} |
2437 |
|
2438 |
if (cpnr < 2 && (((function & 0x03e007f8) == (COPz_MTCz << 21)) |
2439 |
|| ((function & 0x03e007f8) == (COPz_DMTCz << 21)))) { |
2440 |
if (unassemble_only) { |
2441 |
debug("%s%i\t%s,%s\n", |
2442 |
copz==COPz_DMTCz? "dmtc" : "mtc", cpnr, |
2443 |
regnames[rt], cop0_names[rd]); |
2444 |
return; |
2445 |
} |
2446 |
tmpvalue = cpu->cd.mips.gpr[rt]; |
2447 |
if (copz == COPz_MTCz) { |
2448 |
/* Sign-extend: */ |
2449 |
tmpvalue &= 0xffffffffULL; |
2450 |
if (tmpvalue & 0x80000000ULL) |
2451 |
tmpvalue |= 0xffffffff00000000ULL; |
2452 |
} |
2453 |
coproc_register_write(cpu, cpu->cd.mips.coproc[cpnr], rd, |
2454 |
&tmpvalue, copz == COPz_DMTCz); |
2455 |
return; |
2456 |
} |
2457 |
|
2458 |
if (cpnr <= 1 && (((function & 0x03e007ff) == (COPz_CFCz << 21)) |
2459 |
|| ((function & 0x03e007ff) == (COPz_CTCz << 21)))) { |
2460 |
switch (copz) { |
2461 |
case COPz_CFCz: /* Copy from FPU control register */ |
2462 |
rt = (function >> 16) & 31; |
2463 |
fs = (function >> 11) & 31; |
2464 |
if (unassemble_only) { |
2465 |
debug("cfc%i\t%s,r%i\n", cpnr, |
2466 |
regnames[rt], fs); |
2467 |
return; |
2468 |
} |
2469 |
cpu->cd.mips.gpr[rt] = cp->fcr[fs] & 0xffffffffULL; |
2470 |
if (cpu->cd.mips.gpr[rt] & 0x80000000ULL) |
2471 |
cpu->cd.mips.gpr[rt] |= 0xffffffff00000000ULL; |
2472 |
/* TODO: implement delay for gpr[rt] |
2473 |
(for MIPS I,II,III only) */ |
2474 |
return; |
2475 |
case COPz_CTCz: /* Copy to FPU control register */ |
2476 |
rt = (function >> 16) & 31; |
2477 |
fs = (function >> 11) & 31; |
2478 |
if (unassemble_only) { |
2479 |
debug("ctc%i\t%s,r%i\n", cpnr, |
2480 |
regnames[rt], fs); |
2481 |
return; |
2482 |
} |
2483 |
|
2484 |
switch (cpnr) { |
2485 |
case 0: /* System coprocessor */ |
2486 |
fatal("[ warning: unimplemented ctc%i, " |
2487 |
"0x%08x -> ctl reg %i ]\n", cpnr, |
2488 |
(int)cpu->cd.mips.gpr[rt], fs); |
2489 |
break; |
2490 |
case 1: /* FPU */ |
2491 |
if (fs == 0) |
2492 |
fatal("[ Attempt to write to FPU " |
2493 |
"control register 0 (?) ]\n"); |
2494 |
else { |
2495 |
uint64_t tmp = cpu->cd.mips.gpr[rt]; |
2496 |
cp->fcr[fs] = tmp; |
2497 |
|
2498 |
/* TODO: writing to control register 31 |
2499 |
should cause exceptions, depending |
2500 |
on status bits! */ |
2501 |
|
2502 |
switch (fs) { |
2503 |
case FPU_FCCR: |
2504 |
cp->fcr[FPU_FCSR] = |
2505 |
(cp->fcr[FPU_FCSR] & |
2506 |
0x017fffffULL) | ((tmp & 1) |
2507 |
<< FCSR_FCC0_SHIFT) |
2508 |
| (((tmp & 0xfe) >> 1) << |
2509 |
FCSR_FCC1_SHIFT); |
2510 |
break; |
2511 |
case FPU_FCSR: |
2512 |
cp->fcr[FPU_FCCR] = |
2513 |
(cp->fcr[FPU_FCCR] & |
2514 |
0xffffff00ULL) | ((tmp >> |
2515 |
FCSR_FCC0_SHIFT) & 1) | |
2516 |
(((tmp >> FCSR_FCC1_SHIFT) |
2517 |
& 0x7f) << 1); |
2518 |
break; |
2519 |
default: |
2520 |
; |
2521 |
} |
2522 |
} |
2523 |
break; |
2524 |
} |
2525 |
|
2526 |
/* TODO: implement delay for gpr[rt] |
2527 |
(for MIPS I,II,III only) */ |
2528 |
return; |
2529 |
default: |
2530 |
; |
2531 |
} |
2532 |
} |
2533 |
|
2534 |
/* Math (Floating point) coprocessor calls: */ |
2535 |
if (cpnr==1) { |
2536 |
if (fpu_function(cpu, cp, function, unassemble_only)) |
2537 |
return; |
2538 |
} |
2539 |
|
2540 |
/* For AU1500 and probably others: deret */ |
2541 |
if (function == 0x0200001f) { |
2542 |
if (unassemble_only) { |
2543 |
debug("deret\n"); |
2544 |
return; |
2545 |
} |
2546 |
|
2547 |
/* |
2548 |
* According to the MIPS64 manual, deret loads PC from the |
2549 |
* DEPC cop0 register, and jumps there immediately. No |
2550 |
* delay slot. |
2551 |
* |
2552 |
* TODO: This instruction is only available if the processor |
2553 |
* is in debug mode. (What does that mean?) |
2554 |
* TODO: This instruction is undefined in a delay slot. |
2555 |
*/ |
2556 |
|
2557 |
cpu->pc = cpu->cd.mips.pc_last = cp->reg[COP0_DEPC]; |
2558 |
cpu->cd.mips.delay_slot = 0; |
2559 |
cp->reg[COP0_STATUS] &= ~STATUS_EXL; |
2560 |
|
2561 |
return; |
2562 |
} |
2563 |
|
2564 |
|
2565 |
/* Ugly R5900 hacks: */ |
2566 |
if ((function & 0xfffff) == 0x38) { /* ei */ |
2567 |
if (unassemble_only) { |
2568 |
debug("ei\n"); |
2569 |
return; |
2570 |
} |
2571 |
cpu->cd.mips.coproc[0]->reg[COP0_STATUS] |= R5900_STATUS_EIE; |
2572 |
return; |
2573 |
} |
2574 |
|
2575 |
if ((function & 0xfffff) == 0x39) { /* di */ |
2576 |
if (unassemble_only) { |
2577 |
debug("di\n"); |
2578 |
return; |
2579 |
} |
2580 |
cpu->cd.mips.coproc[0]->reg[COP0_STATUS] &= ~R5900_STATUS_EIE; |
2581 |
return; |
2582 |
} |
2583 |
|
2584 |
co_bit = (function >> 25) & 1; |
2585 |
|
2586 |
/* TLB operations and other things: */ |
2587 |
if (cp->coproc_nr == 0) { |
2588 |
op = (function) & 0xff; |
2589 |
switch (co_bit) { |
2590 |
case 1: |
2591 |
switch (op) { |
2592 |
case COP0_TLBR: /* Read indexed TLB entry */ |
2593 |
if (unassemble_only) { |
2594 |
debug("tlbr\n"); |
2595 |
return; |
2596 |
} |
2597 |
coproc_tlbpr(cpu, 1); |
2598 |
return; |
2599 |
case COP0_TLBWI: /* Write indexed */ |
2600 |
case COP0_TLBWR: /* Write random */ |
2601 |
if (unassemble_only) { |
2602 |
if (op == COP0_TLBWI) |
2603 |
debug("tlbwi"); |
2604 |
else |
2605 |
debug("tlbwr"); |
2606 |
if (!running) { |
2607 |
debug("\n"); |
2608 |
return; |
2609 |
} |
2610 |
debug("\tindex=%08llx", |
2611 |
(long long)cp->reg[COP0_INDEX]); |
2612 |
debug(", random=%08llx", |
2613 |
(long long)cp->reg[COP0_RANDOM]); |
2614 |
debug(", mask=%016llx", |
2615 |
(long long)cp->reg[COP0_PAGEMASK]); |
2616 |
debug(", hi=%016llx", |
2617 |
(long long)cp->reg[COP0_ENTRYHI]); |
2618 |
debug(", lo0=%016llx", |
2619 |
(long long)cp->reg[COP0_ENTRYLO0]); |
2620 |
debug(", lo1=%016llx\n", |
2621 |
(long long)cp->reg[COP0_ENTRYLO1]); |
2622 |
} |
2623 |
coproc_tlbwri(cpu, op == COP0_TLBWR); |
2624 |
return; |
2625 |
case COP0_TLBP: /* Probe TLB for |
2626 |
matching entry */ |
2627 |
if (unassemble_only) { |
2628 |
debug("tlbp\n"); |
2629 |
return; |
2630 |
} |
2631 |
coproc_tlbpr(cpu, 0); |
2632 |
return; |
2633 |
case COP0_RFE: /* R2000/R3000 only: |
2634 |
Return from Exception */ |
2635 |
if (unassemble_only) { |
2636 |
debug("rfe\n"); |
2637 |
return; |
2638 |
} |
2639 |
coproc_rfe(cpu); |
2640 |
return; |
2641 |
case COP0_ERET: /* R4000: Return from exception */ |
2642 |
if (unassemble_only) { |
2643 |
debug("eret\n"); |
2644 |
return; |
2645 |
} |
2646 |
coproc_eret(cpu); |
2647 |
return; |
2648 |
case COP0_STANDBY: |
2649 |
if (unassemble_only) { |
2650 |
debug("standby\n"); |
2651 |
return; |
2652 |
} |
2653 |
/* TODO: Hm. Do something here? */ |
2654 |
return; |
2655 |
case COP0_SUSPEND: |
2656 |
if (unassemble_only) { |
2657 |
debug("suspend\n"); |
2658 |
return; |
2659 |
} |
2660 |
/* TODO: Hm. Do something here? */ |
2661 |
return; |
2662 |
case COP0_HIBERNATE: |
2663 |
if (unassemble_only) { |
2664 |
debug("hibernate\n"); |
2665 |
return; |
2666 |
} |
2667 |
/* TODO: Hm. Do something here? */ |
2668 |
return; |
2669 |
default: |
2670 |
; |
2671 |
} |
2672 |
default: |
2673 |
; |
2674 |
} |
2675 |
} |
2676 |
|
2677 |
/* TODO: coprocessor R2020 on DECstation? */ |
2678 |
if ((cp->coproc_nr==0 || cp->coproc_nr==3) && function == 0x0100ffff) { |
2679 |
if (unassemble_only) { |
2680 |
debug("decstation_r2020_writeback\n"); |
2681 |
return; |
2682 |
} |
2683 |
/* TODO */ |
2684 |
return; |
2685 |
} |
2686 |
|
2687 |
/* TODO: RM5200 idle (?) */ |
2688 |
if ((cp->coproc_nr==0 || cp->coproc_nr==3) && function == 0x02000020) { |
2689 |
if (unassemble_only) { |
2690 |
debug("idle(?)\n"); /* TODO */ |
2691 |
return; |
2692 |
} |
2693 |
|
2694 |
/* Idle? TODO */ |
2695 |
return; |
2696 |
} |
2697 |
|
2698 |
if (unassemble_only) { |
2699 |
debug("cop%i\t0x%08x (unimplemented)\n", cpnr, (int)function); |
2700 |
return; |
2701 |
} |
2702 |
|
2703 |
fatal("cpu%i: UNIMPLEMENTED coproc%i function %08lx " |
2704 |
"(pc = %016llx)\n", cpu->cpu_id, cp->coproc_nr, function, |
2705 |
(long long)cpu->cd.mips.pc_last); |
2706 |
#if 1 |
2707 |
single_step = 1; |
2708 |
#else |
2709 |
mips_cpu_exception(cpu, EXCEPTION_CPU, 0, 0, cp->coproc_nr, 0, 0, 0); |
2710 |
#endif |
2711 |
} |
2712 |
|
2713 |
#endif /* ENABLE_MIPS */ |