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[/] [or1k/] [tags/] [nog_patch_33/] [or1ksim/] [cpu/] [or1k/] [sprs.c] - Rev 644
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/* sprs.c -- Simulation of OR1K special-purpose registers Copyright (C) 1999 Damjan Lampret, lampret@opencores.org This file is part of OpenRISC 1000 Architectural Simulator. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <stdlib.h> #include <stdio.h> #include <string.h> #include <errno.h> #include "arch.h" #include "sprs.h" #include "abstract.h" #include "sim-config.h" extern int cont_run; /* defined in toplevel.c */ extern int tt_stopped; /* defined in tick.c */ extern int flag; sprword sprs[MAX_SPRS]; int audio_cnt = 0; static FILE *fo = 0; /* Set a specific SPR with a value. */ inline void mtspr(const int regno, const sprword value) { int ofs = regno % MAX_SPRS_PER_GRP; extern unsigned long pc_phy; extern unsigned long reg[32]; /* MM: Register hooks. */ switch (regno) { case 0xFFFD: fo = fopen ("audiosim.pcm", "wb+"); if (!fo) printf("Cannot open audiosim.pcm\n"); printf("Audio opened.\n"); return; case 0xFFFE: if (!fo) printf("audiosim.pcm not opened\n"); fputc (value & 0xFF, fo); if ((audio_cnt % 1024) == 0) printf("%i\n", audio_cnt); audio_cnt++; return; case 0xFFFF: fclose(fo); printf("Audio closed.\n"); cont_run = 0; return; case SPR_TTCR: tt_stopped = 0; break; case SPR_SR: if(value & SPR_SR_F) flag = 1; else flag = 0; break; case SPR_NPC: { extern unsigned long pc; extern unsigned long pcnext; extern int delay_insn; extern unsigned long pcdelay; clear_pending_exception (); /* The debugger has redirected us to a new address */ /* This is usually done to reissue an instruction which just caused a breakpoint exception. */ pc = value; if(!value && config.sim.verbose) printf("WARNING: PC just set to 0!\n"); /* Clear any pending delay slot jumps also */ delay_insn = 0; pcnext = value + 4; } break; default: /* Links to GPRS */ if(regno >= 0x0400 && regno < 0x0420) reg[regno - 0x0400] = value; break; } if (regno < MAX_SPRS) sprs[regno] = value; else if (config.sim.verbose) printf("WARNING: write out of SPR range %08X\n", regno); } #if 0 /* Get a specific SPR. */ inline sprword mfspr_(const int regno) { extern unsigned long reg[32]; extern unsigned long pc; extern unsigned long pcprev; switch (regno) { case SPR_SR: /* Exceptions are always enabled */ return sprs[regno] | SPR_SR_EXR; case SPR_NPC: return pc; case SPR_PPC: return pcprev; default: /* Links to GPRS */ if(regno >= 0x0400 && regno < 0x0420) return reg[regno - 0x0400]; else if (regno < MAX_SPRS) return sprs[regno]; } if (config.sim.verbose) printf ("WARNING: read out of SPR range %08X\n", regno); return 0; } #endif /* Show status of important SPRs. */ void sprs_status() { printf("VR : 0x%.8x UPR : 0x%.8x\n", mfspr(SPR_VR), mfspr(SPR_UPR)); printf("SR : 0x%.8x\n", mfspr(SPR_SR)); printf("MACLO: 0x%.8x MACHI: 0x%.8x\n", mfspr(SPR_MACLO), mfspr(SPR_MACHI)); printf("EPCR0: 0x%.8x EPCR1: 0x%.8x\n", mfspr(SPR_EPCR_BASE), mfspr(SPR_EPCR_BASE+1)); printf("EEAR0: 0x%.8x EEAR1: 0x%.8x\n", mfspr(SPR_EEAR_BASE), mfspr(SPR_EEAR_BASE+1)); printf("ESR0 : 0x%.8x ESR1 : 0x%.8x\n", mfspr(SPR_ESR_BASE), mfspr(SPR_ESR_BASE+1)); printf("TTMR : 0x%.8x TTCR : 0x%.8x\n", mfspr(SPR_TTMR), mfspr(SPR_TTCR)); printf("PICMR: 0x%.8x PICSR: 0x%.8x\n", mfspr(SPR_PICMR), mfspr(SPR_PICSR)); printf("PPC: 0x%.8x NPC : 0x%.8x\n", mfspr(SPR_PPC), mfspr(SPR_NPC)); }
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