root / target-ppc / helper.c @ 3fc6c082
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/*
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* PowerPC emulation helpers for qemu.
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*
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* Copyright (c) 2003-2005 Jocelyn Mayer
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "exec.h" |
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//#define DEBUG_MMU
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//#define DEBUG_BATS
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//#define DEBUG_EXCEPTIONS
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/* accurate but slower TLB flush in exceptions */
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//#define ACCURATE_TLB_FLUSH
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/*****************************************************************************/
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/* PowerPC MMU emulation */
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|
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/* Perform BAT hit & translation */
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static int get_bat (CPUState *env, uint32_t *real, int *prot, |
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uint32_t virtual, int rw, int type) |
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{
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uint32_t *BATlt, *BATut, *BATu, *BATl; |
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uint32_t base, BEPIl, BEPIu, bl; |
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int i;
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int ret = -1; |
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|
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#if defined (DEBUG_BATS)
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if (loglevel > 0) { |
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fprintf(logfile, "%s: %cBAT v 0x%08x\n", __func__,
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type == ACCESS_CODE ? 'I' : 'D', virtual); |
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} |
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#endif
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switch (type) {
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case ACCESS_CODE:
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BATlt = env->IBAT[1];
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BATut = env->IBAT[0];
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break;
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default:
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BATlt = env->DBAT[1];
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BATut = env->DBAT[0];
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break;
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} |
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#if defined (DEBUG_BATS)
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if (loglevel > 0) { |
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fprintf(logfile, "%s...: %cBAT v 0x%08x\n", __func__,
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type == ACCESS_CODE ? 'I' : 'D', virtual); |
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} |
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#endif
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base = virtual & 0xFFFC0000;
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for (i = 0; i < 4; i++) { |
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BATu = &BATut[i]; |
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BATl = &BATlt[i]; |
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BEPIu = *BATu & 0xF0000000;
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BEPIl = *BATu & 0x0FFE0000;
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bl = (*BATu & 0x00001FFC) << 15; |
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#if defined (DEBUG_BATS)
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if (loglevel > 0) { |
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fprintf(logfile, "%s: %cBAT%d v 0x%08x BATu 0x%08x BATl 0x%08x\n",
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__func__, type == ACCESS_CODE ? 'I' : 'D', i, virtual, |
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*BATu, *BATl); |
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} |
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#endif
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if ((virtual & 0xF0000000) == BEPIu && |
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((virtual & 0x0FFE0000) & ~bl) == BEPIl) {
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/* BAT matches */
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if ((msr_pr == 0 && (*BATu & 0x00000002)) || |
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(msr_pr == 1 && (*BATu & 0x00000001))) { |
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/* Get physical address */
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*real = (*BATl & 0xF0000000) |
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((virtual & 0x0FFE0000 & bl) | (*BATl & 0x0FFE0000)) | |
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(virtual & 0x0001F000);
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if (*BATl & 0x00000001) |
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*prot = PAGE_READ; |
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if (*BATl & 0x00000002) |
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*prot = PAGE_WRITE | PAGE_READ; |
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#if defined (DEBUG_BATS)
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if (loglevel > 0) { |
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fprintf(logfile, "BAT %d match: r 0x%08x prot=%c%c\n",
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i, *real, *prot & PAGE_READ ? 'R' : '-', |
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*prot & PAGE_WRITE ? 'W' : '-'); |
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} |
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#endif
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ret = 0;
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break;
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} |
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} |
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} |
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if (ret < 0) { |
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#if defined (DEBUG_BATS)
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printf("no BAT match for 0x%08x:\n", virtual);
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for (i = 0; i < 4; i++) { |
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BATu = &BATut[i]; |
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BATl = &BATlt[i]; |
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BEPIu = *BATu & 0xF0000000;
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BEPIl = *BATu & 0x0FFE0000;
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bl = (*BATu & 0x00001FFC) << 15; |
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printf("%s: %cBAT%d v 0x%08x BATu 0x%08x BATl 0x%08x \n\t"
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"0x%08x 0x%08x 0x%08x\n",
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__func__, type == ACCESS_CODE ? 'I' : 'D', i, virtual, |
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*BATu, *BATl, BEPIu, BEPIl, bl); |
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} |
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#endif
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} |
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/* No hit */
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return ret;
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} |
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|
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/* PTE table lookup */
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static int find_pte (uint32_t *RPN, int *prot, uint32_t base, uint32_t va, |
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int h, int key, int rw) |
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{
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uint32_t pte0, pte1, keep = 0, access = 0; |
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int i, good = -1, store = 0; |
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int ret = -1; /* No entry found */ |
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for (i = 0; i < 8; i++) { |
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pte0 = ldl_phys(base + (i * 8));
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pte1 = ldl_phys(base + (i * 8) + 4); |
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#if defined (DEBUG_MMU)
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if (loglevel > 0) { |
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fprintf(logfile, "Load pte from 0x%08x => 0x%08x 0x%08x "
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"%d %d %d 0x%08x\n", base + (i * 8), pte0, pte1, |
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pte0 >> 31, h, (pte0 >> 6) & 1, va); |
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} |
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#endif
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/* Check validity and table match */
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if (pte0 & 0x80000000 && (h == ((pte0 >> 6) & 1))) { |
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/* Check vsid & api */
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if ((pte0 & 0x7FFFFFBF) == va) { |
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if (good == -1) { |
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good = i; |
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keep = pte1; |
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} else {
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/* All matches should have equal RPN, WIMG & PP */
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if ((keep & 0xFFFFF07B) != (pte1 & 0xFFFFF07B)) { |
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if (loglevel > 0) |
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fprintf(logfile, "Bad RPN/WIMG/PP\n");
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return -1; |
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} |
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} |
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/* Check access rights */
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if (key == 0) { |
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access = PAGE_READ; |
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if ((pte1 & 0x00000003) != 0x3) |
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access |= PAGE_WRITE; |
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} else {
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switch (pte1 & 0x00000003) { |
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case 0x0: |
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access = 0;
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break;
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case 0x1: |
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case 0x3: |
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access = PAGE_READ; |
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break;
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case 0x2: |
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access = PAGE_READ | PAGE_WRITE; |
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break;
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} |
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} |
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if (ret < 0) { |
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if ((rw == 0 && (access & PAGE_READ)) || |
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(rw == 1 && (access & PAGE_WRITE))) {
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#if defined (DEBUG_MMU)
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if (loglevel > 0) |
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fprintf(logfile, "PTE access granted !\n");
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#endif
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good = i; |
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keep = pte1; |
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ret = 0;
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} else {
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/* Access right violation */
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ret = -2;
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#if defined (DEBUG_MMU)
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if (loglevel > 0) |
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fprintf(logfile, "PTE access rejected\n");
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#endif
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} |
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*prot = access; |
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} |
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} |
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} |
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} |
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if (good != -1) { |
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*RPN = keep & 0xFFFFF000;
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#if defined (DEBUG_MMU)
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if (loglevel > 0) { |
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fprintf(logfile, "found PTE at addr 0x%08x prot=0x%01x ret=%d\n",
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*RPN, *prot, ret); |
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} |
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#endif
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/* Update page flags */
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if (!(keep & 0x00000100)) { |
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/* Access flag */
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keep |= 0x00000100;
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store = 1;
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} |
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if (!(keep & 0x00000080)) { |
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if (rw && ret == 0) { |
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/* Change flag */
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keep |= 0x00000080;
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store = 1;
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} else {
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/* Force page fault for first write access */
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*prot &= ~PAGE_WRITE; |
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} |
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} |
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if (store) {
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stl_phys_notdirty(base + (good * 8) + 4, keep); |
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} |
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} |
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return ret;
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} |
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static inline uint32_t get_pgaddr (uint32_t sdr1, uint32_t hash, uint32_t mask) |
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{
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return (sdr1 & 0xFFFF0000) | (hash & mask); |
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} |
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|
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/* Perform segment based translation */
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static int get_segment (CPUState *env, uint32_t *real, int *prot, |
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uint32_t virtual, int rw, int type) |
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{
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uint32_t pg_addr, sdr, ptem, vsid, pgidx; |
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uint32_t hash, mask; |
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uint32_t sr; |
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int key;
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int ret = -1, ret2; |
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|
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sr = env->sr[virtual >> 28];
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#if defined (DEBUG_MMU)
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if (loglevel > 0) { |
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fprintf(logfile, "Check segment v=0x%08x %d 0x%08x nip=0x%08x "
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"lr=0x%08x ir=%d dr=%d pr=%d %d t=%d\n",
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virtual, virtual >> 28, sr, env->nip,
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env->lr, msr_ir, msr_dr, msr_pr, rw, type); |
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} |
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#endif
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key = (((sr & 0x20000000) && msr_pr == 1) || |
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((sr & 0x40000000) && msr_pr == 0)) ? 1 : 0; |
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if ((sr & 0x80000000) == 0) { |
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#if defined (DEBUG_MMU)
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if (loglevel > 0) |
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fprintf(logfile, "pte segment: key=%d n=0x%08x\n",
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key, sr & 0x10000000);
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#endif
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/* Check if instruction fetch is allowed, if needed */
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if (type != ACCESS_CODE || (sr & 0x10000000) == 0) { |
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/* Page address translation */
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vsid = sr & 0x00FFFFFF;
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pgidx = (virtual >> 12) & 0xFFFF; |
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sdr = env->sdr1; |
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hash = ((vsid ^ pgidx) & 0x0007FFFF) << 6; |
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mask = ((sdr & 0x000001FF) << 16) | 0xFFC0; |
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pg_addr = get_pgaddr(sdr, hash, mask); |
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ptem = (vsid << 7) | (pgidx >> 10); |
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#if defined (DEBUG_MMU)
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if (loglevel > 0) { |
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fprintf(logfile, "0 sdr1=0x%08x vsid=0x%06x api=0x%04x "
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"hash=0x%07x pg_addr=0x%08x\n", sdr, vsid, pgidx, hash,
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pg_addr); |
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} |
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#endif
|
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/* Primary table lookup */
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ret = find_pte(real, prot, pg_addr, ptem, 0, key, rw);
|
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if (ret < 0) { |
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/* Secondary table lookup */
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hash = (~hash) & 0x01FFFFC0;
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pg_addr = get_pgaddr(sdr, hash, mask); |
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#if defined (DEBUG_MMU)
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if (virtual != 0xEFFFFFFF && loglevel > 0) { |
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fprintf(logfile, "1 sdr1=0x%08x vsid=0x%06x api=0x%04x "
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"hash=0x%05x pg_addr=0x%08x\n", sdr, vsid, pgidx,
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hash, pg_addr); |
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} |
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#endif
|
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ret2 = find_pte(real, prot, pg_addr, ptem, 1, key, rw);
|
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if (ret2 != -1) |
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ret = ret2; |
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} |
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} else {
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#if defined (DEBUG_MMU)
|
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if (loglevel > 0) |
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fprintf(logfile, "No access allowed\n");
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#endif
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ret = -3;
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} |
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} else {
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#if defined (DEBUG_MMU)
|
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if (loglevel > 0) |
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fprintf(logfile, "direct store...\n");
|
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#endif
|
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/* Direct-store segment : absolutely *BUGGY* for now */
|
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switch (type) {
|
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case ACCESS_INT:
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/* Integer load/store : only access allowed */
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break;
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case ACCESS_CODE:
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/* No code fetch is allowed in direct-store areas */
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return -4; |
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case ACCESS_FLOAT:
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/* Floating point load/store */
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return -4; |
| 317 |
case ACCESS_RES:
|
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/* lwarx, ldarx or srwcx. */
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return -4; |
| 320 |
case ACCESS_CACHE:
|
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/* dcba, dcbt, dcbtst, dcbf, dcbi, dcbst, dcbz, or icbi */
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/* Should make the instruction do no-op.
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* As it already do no-op, it's quite easy :-)
|
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*/
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*real = virtual; |
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return 0; |
| 327 |
case ACCESS_EXT:
|
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/* eciwx or ecowx */
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return -4; |
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default:
|
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if (logfile) {
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fprintf(logfile, "ERROR: instruction should not need "
|
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"address translation\n");
|
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} |
| 335 |
printf("ERROR: instruction should not need "
|
| 336 |
"address translation\n");
|
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return -4; |
| 338 |
} |
| 339 |
if ((rw == 1 || key != 1) && (rw == 0 || key != 0)) { |
| 340 |
*real = virtual; |
| 341 |
ret = 2;
|
| 342 |
} else {
|
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ret = -2;
|
| 344 |
} |
| 345 |
} |
| 346 |
|
| 347 |
return ret;
|
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} |
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|
| 350 |
int get_physical_address (CPUState *env, uint32_t *physical, int *prot, |
| 351 |
uint32_t address, int rw, int access_type) |
| 352 |
{
|
| 353 |
int ret;
|
| 354 |
#if 0
|
| 355 |
if (loglevel > 0) {
|
| 356 |
fprintf(logfile, "%s\n", __func__);
|
| 357 |
}
|
| 358 |
#endif
|
| 359 |
if ((access_type == ACCESS_CODE && msr_ir == 0) || |
| 360 |
(access_type != ACCESS_CODE && msr_dr == 0)) {
|
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/* No address translation */
|
| 362 |
*physical = address & ~0xFFF;
|
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*prot = PAGE_READ | PAGE_WRITE; |
| 364 |
ret = 0;
|
| 365 |
} else {
|
| 366 |
/* Try to find a BAT */
|
| 367 |
ret = get_bat(env, physical, prot, address, rw, access_type); |
| 368 |
if (ret < 0) { |
| 369 |
/* We didn't match any BAT entry */
|
| 370 |
ret = get_segment(env, physical, prot, address, rw, access_type); |
| 371 |
} |
| 372 |
} |
| 373 |
#if 0
|
| 374 |
if (loglevel > 0) {
|
| 375 |
fprintf(logfile, "%s address %08x => %08x\n",
|
| 376 |
__func__, address, *physical);
|
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}
|
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#endif
|
| 379 |
return ret;
|
| 380 |
} |
| 381 |
|
| 382 |
#if defined(CONFIG_USER_ONLY)
|
| 383 |
target_ulong cpu_get_phys_page_debug(CPUState *env, target_ulong addr) |
| 384 |
{
|
| 385 |
return addr;
|
| 386 |
} |
| 387 |
#else
|
| 388 |
target_ulong cpu_get_phys_page_debug(CPUState *env, target_ulong addr) |
| 389 |
{
|
| 390 |
uint32_t phys_addr; |
| 391 |
int prot;
|
| 392 |
|
| 393 |
if (get_physical_address(env, &phys_addr, &prot, addr, 0, ACCESS_INT) != 0) |
| 394 |
return -1; |
| 395 |
return phys_addr;
|
| 396 |
} |
| 397 |
#endif
|
| 398 |
|
| 399 |
#if !defined(CONFIG_USER_ONLY)
|
| 400 |
|
| 401 |
#define MMUSUFFIX _mmu
|
| 402 |
#define GETPC() (__builtin_return_address(0)) |
| 403 |
|
| 404 |
#define SHIFT 0 |
| 405 |
#include "softmmu_template.h" |
| 406 |
|
| 407 |
#define SHIFT 1 |
| 408 |
#include "softmmu_template.h" |
| 409 |
|
| 410 |
#define SHIFT 2 |
| 411 |
#include "softmmu_template.h" |
| 412 |
|
| 413 |
#define SHIFT 3 |
| 414 |
#include "softmmu_template.h" |
| 415 |
|
| 416 |
/* try to fill the TLB and return an exception if error. If retaddr is
|
| 417 |
NULL, it means that the function was called in C code (i.e. not
|
| 418 |
from generated code or from helper.c) */
|
| 419 |
/* XXX: fix it to restore all registers */
|
| 420 |
void tlb_fill(target_ulong addr, int is_write, int is_user, void *retaddr) |
| 421 |
{
|
| 422 |
TranslationBlock *tb; |
| 423 |
CPUState *saved_env; |
| 424 |
unsigned long pc; |
| 425 |
int ret;
|
| 426 |
|
| 427 |
/* XXX: hack to restore env in all cases, even if not called from
|
| 428 |
generated code */
|
| 429 |
saved_env = env; |
| 430 |
env = cpu_single_env; |
| 431 |
#if 0
|
| 432 |
{
|
| 433 |
unsigned long tlb_addrr, tlb_addrw;
|
| 434 |
int index;
|
| 435 |
index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
| 436 |
tlb_addrr = env->tlb_read[is_user][index].address;
|
| 437 |
tlb_addrw = env->tlb_write[is_user][index].address;
|
| 438 |
if (loglevel) {
|
| 439 |
fprintf(logfile,
|
| 440 |
"%s 1 %p %p idx=%d addr=0x%08lx tbl_addr=0x%08lx 0x%08lx "
|
| 441 |
"(0x%08lx 0x%08lx)\n", __func__, env,
|
| 442 |
&env->tlb_read[is_user][index], index, addr,
|
| 443 |
tlb_addrr, tlb_addrw, addr & TARGET_PAGE_MASK,
|
| 444 |
tlb_addrr & (TARGET_PAGE_MASK | TLB_INVALID_MASK));
|
| 445 |
}
|
| 446 |
}
|
| 447 |
#endif
|
| 448 |
ret = cpu_ppc_handle_mmu_fault(env, addr, is_write, is_user, 1);
|
| 449 |
if (ret) {
|
| 450 |
if (retaddr) {
|
| 451 |
/* now we have a real cpu fault */
|
| 452 |
pc = (unsigned long)retaddr; |
| 453 |
tb = tb_find_pc(pc); |
| 454 |
if (tb) {
|
| 455 |
/* the PC is inside the translated code. It means that we have
|
| 456 |
a virtual CPU fault */
|
| 457 |
cpu_restore_state(tb, env, pc, NULL);
|
| 458 |
} |
| 459 |
} |
| 460 |
do_raise_exception_err(env->exception_index, env->error_code); |
| 461 |
} |
| 462 |
#if 0
|
| 463 |
{
|
| 464 |
unsigned long tlb_addrr, tlb_addrw;
|
| 465 |
int index;
|
| 466 |
index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
| 467 |
tlb_addrr = env->tlb_read[is_user][index].address;
|
| 468 |
tlb_addrw = env->tlb_write[is_user][index].address;
|
| 469 |
printf("%s 2 %p %p idx=%d addr=0x%08lx tbl_addr=0x%08lx 0x%08lx "
|
| 470 |
"(0x%08lx 0x%08lx)\n", __func__, env,
|
| 471 |
&env->tlb_read[is_user][index], index, addr,
|
| 472 |
tlb_addrr, tlb_addrw, addr & TARGET_PAGE_MASK,
|
| 473 |
tlb_addrr & (TARGET_PAGE_MASK | TLB_INVALID_MASK));
|
| 474 |
}
|
| 475 |
#endif
|
| 476 |
env = saved_env; |
| 477 |
} |
| 478 |
|
| 479 |
void cpu_ppc_init_mmu(CPUState *env)
|
| 480 |
{
|
| 481 |
/* Nothing to do: all translation are disabled */
|
| 482 |
} |
| 483 |
#endif
|
| 484 |
|
| 485 |
/* Perform address translation */
|
| 486 |
int cpu_ppc_handle_mmu_fault (CPUState *env, uint32_t address, int rw, |
| 487 |
int is_user, int is_softmmu) |
| 488 |
{
|
| 489 |
uint32_t physical; |
| 490 |
int prot;
|
| 491 |
int exception = 0, error_code = 0; |
| 492 |
int access_type;
|
| 493 |
int ret = 0; |
| 494 |
|
| 495 |
if (rw == 2) { |
| 496 |
/* code access */
|
| 497 |
rw = 0;
|
| 498 |
access_type = ACCESS_CODE; |
| 499 |
} else {
|
| 500 |
/* data access */
|
| 501 |
/* XXX: put correct access by using cpu_restore_state()
|
| 502 |
correctly */
|
| 503 |
access_type = ACCESS_INT; |
| 504 |
// access_type = env->access_type;
|
| 505 |
} |
| 506 |
if (env->user_mode_only) {
|
| 507 |
/* user mode only emulation */
|
| 508 |
ret = -2;
|
| 509 |
goto do_fault;
|
| 510 |
} |
| 511 |
ret = get_physical_address(env, &physical, &prot, |
| 512 |
address, rw, access_type); |
| 513 |
if (ret == 0) { |
| 514 |
ret = tlb_set_page(env, address & ~0xFFF, physical, prot,
|
| 515 |
is_user, is_softmmu); |
| 516 |
} else if (ret < 0) { |
| 517 |
do_fault:
|
| 518 |
#if defined (DEBUG_MMU)
|
| 519 |
if (loglevel > 0) |
| 520 |
cpu_dump_state(env, logfile, fprintf, 0);
|
| 521 |
#endif
|
| 522 |
if (access_type == ACCESS_CODE) {
|
| 523 |
exception = EXCP_ISI; |
| 524 |
switch (ret) {
|
| 525 |
case -1: |
| 526 |
/* No matches in page tables */
|
| 527 |
error_code = EXCP_ISI_TRANSLATE; |
| 528 |
break;
|
| 529 |
case -2: |
| 530 |
/* Access rights violation */
|
| 531 |
error_code = EXCP_ISI_PROT; |
| 532 |
break;
|
| 533 |
case -3: |
| 534 |
/* No execute protection violation */
|
| 535 |
error_code = EXCP_ISI_NOEXEC; |
| 536 |
break;
|
| 537 |
case -4: |
| 538 |
/* Direct store exception */
|
| 539 |
/* No code fetch is allowed in direct-store areas */
|
| 540 |
error_code = EXCP_ISI_DIRECT; |
| 541 |
break;
|
| 542 |
} |
| 543 |
} else {
|
| 544 |
exception = EXCP_DSI; |
| 545 |
switch (ret) {
|
| 546 |
case -1: |
| 547 |
/* No matches in page tables */
|
| 548 |
error_code = EXCP_DSI_TRANSLATE; |
| 549 |
break;
|
| 550 |
case -2: |
| 551 |
/* Access rights violation */
|
| 552 |
error_code = EXCP_DSI_PROT; |
| 553 |
break;
|
| 554 |
case -4: |
| 555 |
/* Direct store exception */
|
| 556 |
switch (access_type) {
|
| 557 |
case ACCESS_FLOAT:
|
| 558 |
/* Floating point load/store */
|
| 559 |
exception = EXCP_ALIGN; |
| 560 |
error_code = EXCP_ALIGN_FP; |
| 561 |
break;
|
| 562 |
case ACCESS_RES:
|
| 563 |
/* lwarx, ldarx or srwcx. */
|
| 564 |
exception = EXCP_DSI; |
| 565 |
error_code = EXCP_DSI_NOTSUP | EXCP_DSI_DIRECT; |
| 566 |
break;
|
| 567 |
case ACCESS_EXT:
|
| 568 |
/* eciwx or ecowx */
|
| 569 |
exception = EXCP_DSI; |
| 570 |
error_code = EXCP_DSI_NOTSUP | EXCP_DSI_DIRECT | |
| 571 |
EXCP_DSI_ECXW; |
| 572 |
break;
|
| 573 |
default:
|
| 574 |
printf("DSI: invalid exception (%d)\n", ret);
|
| 575 |
exception = EXCP_PROGRAM; |
| 576 |
error_code = EXCP_INVAL | EXCP_INVAL_INVAL; |
| 577 |
break;
|
| 578 |
} |
| 579 |
} |
| 580 |
if (rw)
|
| 581 |
error_code |= EXCP_DSI_STORE; |
| 582 |
/* Store fault address */
|
| 583 |
env->spr[SPR_DAR] = address; |
| 584 |
} |
| 585 |
#if 0
|
| 586 |
printf("%s: set exception to %d %02x\n",
|
| 587 |
__func__, exception, error_code);
|
| 588 |
#endif
|
| 589 |
env->exception_index = exception; |
| 590 |
env->error_code = error_code; |
| 591 |
ret = 1;
|
| 592 |
} |
| 593 |
return ret;
|
| 594 |
} |
| 595 |
|
| 596 |
/*****************************************************************************/
|
| 597 |
/* BATs management */
|
| 598 |
#if !defined(FLUSH_ALL_TLBS)
|
| 599 |
static inline void do_invalidate_BAT (CPUPPCState *env, |
| 600 |
target_ulong BATu, target_ulong mask) |
| 601 |
{
|
| 602 |
target_ulong base, end, page; |
| 603 |
base = BATu & ~0x0001FFFF;
|
| 604 |
end = base + mask + 0x00020000;
|
| 605 |
#if defined (DEBUG_BATS)
|
| 606 |
if (loglevel != 0) |
| 607 |
fprintf(logfile, "Flush BAT from %08x to %08x (%08x)\n", base, end, mask);
|
| 608 |
#endif
|
| 609 |
for (page = base; page != end; page += TARGET_PAGE_SIZE)
|
| 610 |
tlb_flush_page(env, page); |
| 611 |
#if defined (DEBUG_BATS)
|
| 612 |
if (loglevel != 0) |
| 613 |
fprintf(logfile, "Flush done\n");
|
| 614 |
#endif
|
| 615 |
} |
| 616 |
#endif
|
| 617 |
|
| 618 |
static inline void dump_store_bat (CPUPPCState *env, char ID, int ul, int nr, |
| 619 |
target_ulong value) |
| 620 |
{
|
| 621 |
#if defined (DEBUG_BATS)
|
| 622 |
if (loglevel != 0) { |
| 623 |
fprintf(logfile, "Set %cBAT%d%c to 0x%08lx (0x%08lx)\n",
|
| 624 |
ID, nr, ul == 0 ? 'u' : 'l', (unsigned long)value, |
| 625 |
(unsigned long)env->nip); |
| 626 |
} |
| 627 |
#endif
|
| 628 |
} |
| 629 |
|
| 630 |
target_ulong do_load_ibatu (CPUPPCState *env, int nr)
|
| 631 |
{
|
| 632 |
return env->IBAT[0][nr]; |
| 633 |
} |
| 634 |
|
| 635 |
target_ulong do_load_ibatl (CPUPPCState *env, int nr)
|
| 636 |
{
|
| 637 |
return env->IBAT[1][nr]; |
| 638 |
} |
| 639 |
|
| 640 |
void do_store_ibatu (CPUPPCState *env, int nr, target_ulong value) |
| 641 |
{
|
| 642 |
target_ulong mask; |
| 643 |
|
| 644 |
dump_store_bat(env, 'I', 0, nr, value); |
| 645 |
if (env->IBAT[0][nr] != value) { |
| 646 |
mask = (value << 15) & 0x0FFE0000UL; |
| 647 |
#if !defined(FLUSH_ALL_TLBS)
|
| 648 |
do_invalidate_BAT(env, env->IBAT[0][nr], mask);
|
| 649 |
#endif
|
| 650 |
/* When storing valid upper BAT, mask BEPI and BRPN
|
| 651 |
* and invalidate all TLBs covered by this BAT
|
| 652 |
*/
|
| 653 |
mask = (value << 15) & 0x0FFE0000UL; |
| 654 |
env->IBAT[0][nr] = (value & 0x00001FFFUL) | |
| 655 |
(value & ~0x0001FFFFUL & ~mask);
|
| 656 |
env->IBAT[1][nr] = (env->IBAT[1][nr] & 0x0000007B) | |
| 657 |
(env->IBAT[1][nr] & ~0x0001FFFF & ~mask); |
| 658 |
#if !defined(FLUSH_ALL_TLBS)
|
| 659 |
do_invalidate_BAT(env, env->IBAT[0][nr], mask);
|
| 660 |
#endif
|
| 661 |
#if defined(FLUSH_ALL_TLBS)
|
| 662 |
tlb_flush(env, 1);
|
| 663 |
#endif
|
| 664 |
} |
| 665 |
} |
| 666 |
|
| 667 |
void do_store_ibatl (CPUPPCState *env, int nr, target_ulong value) |
| 668 |
{
|
| 669 |
dump_store_bat(env, 'I', 1, nr, value); |
| 670 |
env->IBAT[1][nr] = value;
|
| 671 |
} |
| 672 |
|
| 673 |
target_ulong do_load_dbatu (CPUPPCState *env, int nr)
|
| 674 |
{
|
| 675 |
return env->DBAT[0][nr]; |
| 676 |
} |
| 677 |
|
| 678 |
target_ulong do_load_dbatl (CPUPPCState *env, int nr)
|
| 679 |
{
|
| 680 |
return env->DBAT[1][nr]; |
| 681 |
} |
| 682 |
|
| 683 |
void do_store_dbatu (CPUPPCState *env, int nr, target_ulong value) |
| 684 |
{
|
| 685 |
target_ulong mask; |
| 686 |
|
| 687 |
dump_store_bat(env, 'D', 0, nr, value); |
| 688 |
if (env->DBAT[0][nr] != value) { |
| 689 |
/* When storing valid upper BAT, mask BEPI and BRPN
|
| 690 |
* and invalidate all TLBs covered by this BAT
|
| 691 |
*/
|
| 692 |
mask = (value << 15) & 0x0FFE0000UL; |
| 693 |
#if !defined(FLUSH_ALL_TLBS)
|
| 694 |
do_invalidate_BAT(env, env->DBAT[0][nr], mask);
|
| 695 |
#endif
|
| 696 |
mask = (value << 15) & 0x0FFE0000UL; |
| 697 |
env->DBAT[0][nr] = (value & 0x00001FFFUL) | |
| 698 |
(value & ~0x0001FFFFUL & ~mask);
|
| 699 |
env->DBAT[1][nr] = (env->DBAT[1][nr] & 0x0000007B) | |
| 700 |
(env->DBAT[1][nr] & ~0x0001FFFF & ~mask); |
| 701 |
#if !defined(FLUSH_ALL_TLBS)
|
| 702 |
do_invalidate_BAT(env, env->DBAT[0][nr], mask);
|
| 703 |
#else
|
| 704 |
tlb_flush(env, 1);
|
| 705 |
#endif
|
| 706 |
} |
| 707 |
} |
| 708 |
|
| 709 |
void do_store_dbatl (CPUPPCState *env, int nr, target_ulong value) |
| 710 |
{
|
| 711 |
dump_store_bat(env, 'D', 1, nr, value); |
| 712 |
env->DBAT[1][nr] = value;
|
| 713 |
} |
| 714 |
|
| 715 |
static inline void invalidate_all_tlbs (CPUPPCState *env) |
| 716 |
{
|
| 717 |
/* XXX: this needs to be completed for sotware driven TLB support */
|
| 718 |
tlb_flush(env, 1);
|
| 719 |
} |
| 720 |
|
| 721 |
/*****************************************************************************/
|
| 722 |
/* Special registers manipulation */
|
| 723 |
target_ulong do_load_nip (CPUPPCState *env) |
| 724 |
{
|
| 725 |
return env->nip;
|
| 726 |
} |
| 727 |
|
| 728 |
void do_store_nip (CPUPPCState *env, target_ulong value)
|
| 729 |
{
|
| 730 |
env->nip = value; |
| 731 |
} |
| 732 |
|
| 733 |
target_ulong do_load_sdr1 (CPUPPCState *env) |
| 734 |
{
|
| 735 |
return env->sdr1;
|
| 736 |
} |
| 737 |
|
| 738 |
void do_store_sdr1 (CPUPPCState *env, target_ulong value)
|
| 739 |
{
|
| 740 |
#if defined (DEBUG_MMU)
|
| 741 |
if (loglevel != 0) { |
| 742 |
fprintf(logfile, "%s: 0x%08lx\n", __func__, (unsigned long)value); |
| 743 |
} |
| 744 |
#endif
|
| 745 |
if (env->sdr1 != value) {
|
| 746 |
env->sdr1 = value; |
| 747 |
invalidate_all_tlbs(env); |
| 748 |
} |
| 749 |
} |
| 750 |
|
| 751 |
target_ulong do_load_sr (CPUPPCState *env, int srnum)
|
| 752 |
{
|
| 753 |
return env->sr[srnum];
|
| 754 |
} |
| 755 |
|
| 756 |
void do_store_sr (CPUPPCState *env, int srnum, target_ulong value) |
| 757 |
{
|
| 758 |
#if defined (DEBUG_MMU)
|
| 759 |
if (loglevel != 0) { |
| 760 |
fprintf(logfile, "%s: reg=%d 0x%08lx %08lx\n",
|
| 761 |
__func__, srnum, (unsigned long)value, env->sr[srnum]); |
| 762 |
} |
| 763 |
#endif
|
| 764 |
if (env->sr[srnum] != value) {
|
| 765 |
env->sr[srnum] = value; |
| 766 |
#if !defined(FLUSH_ALL_TLBS) && 0 |
| 767 |
{
|
| 768 |
target_ulong page, end; |
| 769 |
/* Invalidate 256 MB of virtual memory */
|
| 770 |
page = (16 << 20) * srnum; |
| 771 |
end = page + (16 << 20); |
| 772 |
for (; page != end; page += TARGET_PAGE_SIZE)
|
| 773 |
tlb_flush_page(env, page); |
| 774 |
} |
| 775 |
#else
|
| 776 |
invalidate_all_tlbs(env); |
| 777 |
#endif
|
| 778 |
} |
| 779 |
} |
| 780 |
|
| 781 |
uint32_t do_load_cr (CPUPPCState *env) |
| 782 |
{
|
| 783 |
return (env->crf[0] << 28) | |
| 784 |
(env->crf[1] << 24) | |
| 785 |
(env->crf[2] << 20) | |
| 786 |
(env->crf[3] << 16) | |
| 787 |
(env->crf[4] << 12) | |
| 788 |
(env->crf[5] << 8) | |
| 789 |
(env->crf[6] << 4) | |
| 790 |
(env->crf[7] << 0); |
| 791 |
} |
| 792 |
|
| 793 |
void do_store_cr (CPUPPCState *env, uint32_t value, uint32_t mask)
|
| 794 |
{
|
| 795 |
int i, sh;
|
| 796 |
|
| 797 |
for (i = 0, sh = 7; i < 8; i++, sh --) { |
| 798 |
if (mask & (1 << sh)) |
| 799 |
env->crf[i] = (value >> (sh * 4)) & 0xFUL; |
| 800 |
} |
| 801 |
} |
| 802 |
|
| 803 |
uint32_t do_load_xer (CPUPPCState *env) |
| 804 |
{
|
| 805 |
return (xer_so << XER_SO) |
|
| 806 |
(xer_ov << XER_OV) | |
| 807 |
(xer_ca << XER_CA) | |
| 808 |
(xer_bc << XER_BC) | |
| 809 |
(xer_cmp << XER_CMP); |
| 810 |
} |
| 811 |
|
| 812 |
void do_store_xer (CPUPPCState *env, uint32_t value)
|
| 813 |
{
|
| 814 |
xer_so = (value >> XER_SO) & 0x01;
|
| 815 |
xer_ov = (value >> XER_OV) & 0x01;
|
| 816 |
xer_ca = (value >> XER_CA) & 0x01;
|
| 817 |
xer_cmp = (value >> XER_CMP) & 0xFF;
|
| 818 |
xer_bc = (value >> XER_BC) & 0x3F;
|
| 819 |
} |
| 820 |
|
| 821 |
target_ulong do_load_msr (CPUPPCState *env) |
| 822 |
{
|
| 823 |
return (msr_vr << MSR_VR) |
|
| 824 |
(msr_ap << MSR_AP) | |
| 825 |
(msr_sa << MSR_SA) | |
| 826 |
(msr_key << MSR_KEY) | |
| 827 |
(msr_pow << MSR_POW) | |
| 828 |
(msr_tlb << MSR_TLB) | |
| 829 |
(msr_ile << MSR_ILE) | |
| 830 |
(msr_ee << MSR_EE) | |
| 831 |
(msr_pr << MSR_PR) | |
| 832 |
(msr_fp << MSR_FP) | |
| 833 |
(msr_me << MSR_ME) | |
| 834 |
(msr_fe0 << MSR_FE0) | |
| 835 |
(msr_se << MSR_SE) | |
| 836 |
(msr_be << MSR_BE) | |
| 837 |
(msr_fe1 << MSR_FE1) | |
| 838 |
(msr_al << MSR_AL) | |
| 839 |
(msr_ip << MSR_IP) | |
| 840 |
(msr_ir << MSR_IR) | |
| 841 |
(msr_dr << MSR_DR) | |
| 842 |
(msr_pe << MSR_PE) | |
| 843 |
(msr_px << MSR_PX) | |
| 844 |
(msr_ri << MSR_RI) | |
| 845 |
(msr_le << MSR_LE); |
| 846 |
} |
| 847 |
|
| 848 |
void do_compute_hflags (CPUPPCState *env)
|
| 849 |
{
|
| 850 |
/* Compute current hflags */
|
| 851 |
env->hflags = (msr_pr << MSR_PR) | (msr_le << MSR_LE) | |
| 852 |
(msr_fp << MSR_FP) | (msr_fe0 << MSR_FE0) | (msr_fe1 << MSR_FE1) | |
| 853 |
(msr_vr << MSR_VR) | (msr_ap << MSR_AP) | (msr_sa << MSR_SA) | |
| 854 |
(msr_se << MSR_SE) | (msr_be << MSR_BE); |
| 855 |
} |
| 856 |
|
| 857 |
void do_store_msr (CPUPPCState *env, target_ulong value)
|
| 858 |
{
|
| 859 |
value &= env->msr_mask; |
| 860 |
if (((value >> MSR_IR) & 1) != msr_ir || |
| 861 |
((value >> MSR_DR) & 1) != msr_dr) {
|
| 862 |
/* Flush all tlb when changing translation mode
|
| 863 |
* When using software driven TLB, we may also need to reload
|
| 864 |
* all defined TLBs
|
| 865 |
*/
|
| 866 |
tlb_flush(env, 1);
|
| 867 |
env->interrupt_request |= CPU_INTERRUPT_EXITTB; |
| 868 |
} |
| 869 |
#if 0
|
| 870 |
if (loglevel != 0) {
|
| 871 |
fprintf(logfile, "%s: T0 %08lx\n", __func__, value);
|
| 872 |
}
|
| 873 |
#endif
|
| 874 |
msr_vr = (value >> MSR_VR) & 1;
|
| 875 |
msr_ap = (value >> MSR_AP) & 1;
|
| 876 |
msr_sa = (value >> MSR_SA) & 1;
|
| 877 |
msr_key = (value >> MSR_KEY) & 1;
|
| 878 |
msr_pow = (value >> MSR_POW) & 1;
|
| 879 |
msr_tlb = (value >> MSR_TLB) & 1;
|
| 880 |
msr_ile = (value >> MSR_ILE) & 1;
|
| 881 |
msr_ee = (value >> MSR_EE) & 1;
|
| 882 |
msr_pr = (value >> MSR_PR) & 1;
|
| 883 |
msr_fp = (value >> MSR_FP) & 1;
|
| 884 |
msr_me = (value >> MSR_ME) & 1;
|
| 885 |
msr_fe0 = (value >> MSR_FE0) & 1;
|
| 886 |
msr_se = (value >> MSR_SE) & 1;
|
| 887 |
msr_be = (value >> MSR_BE) & 1;
|
| 888 |
msr_fe1 = (value >> MSR_FE1) & 1;
|
| 889 |
msr_al = (value >> MSR_AL) & 1;
|
| 890 |
msr_ip = (value >> MSR_IP) & 1;
|
| 891 |
msr_ir = (value >> MSR_IR) & 1;
|
| 892 |
msr_dr = (value >> MSR_DR) & 1;
|
| 893 |
msr_pe = (value >> MSR_PE) & 1;
|
| 894 |
msr_px = (value >> MSR_PX) & 1;
|
| 895 |
msr_ri = (value >> MSR_RI) & 1;
|
| 896 |
msr_le = (value >> MSR_LE) & 1;
|
| 897 |
do_compute_hflags(env); |
| 898 |
} |
| 899 |
|
| 900 |
float64 do_load_fpscr (CPUPPCState *env) |
| 901 |
{
|
| 902 |
/* The 32 MSB of the target fpr are undefined.
|
| 903 |
* They'll be zero...
|
| 904 |
*/
|
| 905 |
union {
|
| 906 |
float64 d; |
| 907 |
struct {
|
| 908 |
uint32_t u[2];
|
| 909 |
} s; |
| 910 |
} u; |
| 911 |
int i;
|
| 912 |
|
| 913 |
#ifdef WORDS_BIGENDIAN
|
| 914 |
#define WORD0 0 |
| 915 |
#define WORD1 1 |
| 916 |
#else
|
| 917 |
#define WORD0 1 |
| 918 |
#define WORD1 0 |
| 919 |
#endif
|
| 920 |
u.s.u[WORD0] = 0;
|
| 921 |
u.s.u[WORD1] = 0;
|
| 922 |
for (i = 0; i < 8; i++) |
| 923 |
u.s.u[WORD1] |= env->fpscr[i] << (4 * i);
|
| 924 |
return u.d;
|
| 925 |
} |
| 926 |
|
| 927 |
void do_store_fpscr (CPUPPCState *env, float64 f, uint32_t mask)
|
| 928 |
{
|
| 929 |
/*
|
| 930 |
* We use only the 32 LSB of the incoming fpr
|
| 931 |
*/
|
| 932 |
union {
|
| 933 |
double d;
|
| 934 |
struct {
|
| 935 |
uint32_t u[2];
|
| 936 |
} s; |
| 937 |
} u; |
| 938 |
int i, rnd_type;
|
| 939 |
|
| 940 |
u.d = f; |
| 941 |
if (mask & 0x80) |
| 942 |
env->fpscr[0] = (env->fpscr[0] & 0x9) | ((u.s.u[WORD1] >> 28) & ~0x9); |
| 943 |
for (i = 1; i < 7; i++) { |
| 944 |
if (mask & (1 << (7 - i))) |
| 945 |
env->fpscr[i] = (u.s.u[WORD1] >> (4 * (7 - i))) & 0xF; |
| 946 |
} |
| 947 |
/* TODO: update FEX & VX */
|
| 948 |
/* Set rounding mode */
|
| 949 |
switch (env->fpscr[0] & 0x3) { |
| 950 |
case 0: |
| 951 |
/* Best approximation (round to nearest) */
|
| 952 |
rnd_type = float_round_nearest_even; |
| 953 |
break;
|
| 954 |
case 1: |
| 955 |
/* Smaller magnitude (round toward zero) */
|
| 956 |
rnd_type = float_round_to_zero; |
| 957 |
break;
|
| 958 |
case 2: |
| 959 |
/* Round toward +infinite */
|
| 960 |
rnd_type = float_round_up; |
| 961 |
break;
|
| 962 |
default:
|
| 963 |
case 3: |
| 964 |
/* Round toward -infinite */
|
| 965 |
rnd_type = float_round_down; |
| 966 |
break;
|
| 967 |
} |
| 968 |
set_float_rounding_mode(rnd_type, &env->fp_status); |
| 969 |
} |
| 970 |
|
| 971 |
/*****************************************************************************/
|
| 972 |
/* Exception processing */
|
| 973 |
#if defined (CONFIG_USER_ONLY)
|
| 974 |
void do_interrupt (CPUState *env)
|
| 975 |
{
|
| 976 |
env->exception_index = -1;
|
| 977 |
} |
| 978 |
#else
|
| 979 |
static void dump_syscall(CPUState *env) |
| 980 |
{
|
| 981 |
fprintf(logfile, "syscall r0=0x%08x r3=0x%08x r4=0x%08x r5=0x%08x r6=0x%08x nip=0x%08x\n",
|
| 982 |
env->gpr[0], env->gpr[3], env->gpr[4], |
| 983 |
env->gpr[5], env->gpr[6], env->nip); |
| 984 |
} |
| 985 |
|
| 986 |
void do_interrupt (CPUState *env)
|
| 987 |
{
|
| 988 |
uint32_t msr; |
| 989 |
int excp;
|
| 990 |
|
| 991 |
excp = env->exception_index; |
| 992 |
msr = do_load_msr(env); |
| 993 |
#if defined (DEBUG_EXCEPTIONS)
|
| 994 |
if ((excp == EXCP_PROGRAM || excp == EXCP_DSI) && msr_pr == 1) |
| 995 |
{
|
| 996 |
if (loglevel > 0) { |
| 997 |
fprintf(logfile, "Raise exception at 0x%08x => 0x%08x (%02x)\n",
|
| 998 |
env->nip, excp << 8, env->error_code);
|
| 999 |
} |
| 1000 |
if (loglevel > 0) |
| 1001 |
cpu_dump_state(env, logfile, fprintf, 0);
|
| 1002 |
} |
| 1003 |
#endif
|
| 1004 |
if (loglevel & CPU_LOG_INT) {
|
| 1005 |
fprintf(logfile, "Raise exception at 0x%08x => 0x%08x (%02x)\n",
|
| 1006 |
env->nip, excp << 8, env->error_code);
|
| 1007 |
} |
| 1008 |
/* Generate informations in save/restore registers */
|
| 1009 |
switch (excp) {
|
| 1010 |
case EXCP_NONE:
|
| 1011 |
/* Do nothing */
|
| 1012 |
#if defined (DEBUG_EXCEPTIONS)
|
| 1013 |
printf("%s: escape EXCP_NONE\n", __func__);
|
| 1014 |
#endif
|
| 1015 |
return;
|
| 1016 |
case EXCP_RESET:
|
| 1017 |
if (msr_ip)
|
| 1018 |
excp += 0xFFC00;
|
| 1019 |
goto store_next;
|
| 1020 |
case EXCP_MACHINE_CHECK:
|
| 1021 |
if (msr_me == 0) { |
| 1022 |
cpu_abort(env, "Machine check exception while not allowed\n");
|
| 1023 |
} |
| 1024 |
msr_me = 0;
|
| 1025 |
break;
|
| 1026 |
case EXCP_DSI:
|
| 1027 |
/* Store exception cause */
|
| 1028 |
/* data location address has been stored
|
| 1029 |
* when the fault has been detected
|
| 1030 |
*/
|
| 1031 |
msr &= ~0xFFFF0000;
|
| 1032 |
env->spr[SPR_DSISR] = 0;
|
| 1033 |
if ((env->error_code & 0x0f) == EXCP_DSI_TRANSLATE) |
| 1034 |
env->spr[SPR_DSISR] |= 0x40000000;
|
| 1035 |
else if ((env->error_code & 0x0f) == EXCP_DSI_PROT) |
| 1036 |
env->spr[SPR_DSISR] |= 0x08000000;
|
| 1037 |
else if ((env->error_code & 0x0f) == EXCP_DSI_NOTSUP) { |
| 1038 |
env->spr[SPR_DSISR] |= 0x80000000;
|
| 1039 |
if (env->error_code & EXCP_DSI_DIRECT)
|
| 1040 |
env->spr[SPR_DSISR] |= 0x04000000;
|
| 1041 |
} |
| 1042 |
if (env->error_code & EXCP_DSI_STORE)
|
| 1043 |
env->spr[SPR_DSISR] |= 0x02000000;
|
| 1044 |
if ((env->error_code & 0xF) == EXCP_DSI_DABR) |
| 1045 |
env->spr[SPR_DSISR] |= 0x00400000;
|
| 1046 |
if (env->error_code & EXCP_DSI_ECXW)
|
| 1047 |
env->spr[SPR_DSISR] |= 0x00100000;
|
| 1048 |
#if defined (DEBUG_EXCEPTIONS)
|
| 1049 |
if (loglevel) {
|
| 1050 |
fprintf(logfile, "DSI exception: DSISR=0x%08x, DAR=0x%08x\n",
|
| 1051 |
env->spr[SPR_DSISR], env->spr[SPR_DAR]); |
| 1052 |
} else {
|
| 1053 |
printf("DSI exception: DSISR=0x%08x, DAR=0x%08x nip=0x%08x\n",
|
| 1054 |
env->spr[SPR_DSISR], env->spr[SPR_DAR], env->nip); |
| 1055 |
} |
| 1056 |
#endif
|
| 1057 |
goto store_next;
|
| 1058 |
case EXCP_ISI:
|
| 1059 |
/* Store exception cause */
|
| 1060 |
msr &= ~0xFFFF0000;
|
| 1061 |
if (env->error_code == EXCP_ISI_TRANSLATE)
|
| 1062 |
msr |= 0x40000000;
|
| 1063 |
else if (env->error_code == EXCP_ISI_NOEXEC || |
| 1064 |
env->error_code == EXCP_ISI_GUARD || |
| 1065 |
env->error_code == EXCP_ISI_DIRECT) |
| 1066 |
msr |= 0x10000000;
|
| 1067 |
else
|
| 1068 |
msr |= 0x08000000;
|
| 1069 |
#if defined (DEBUG_EXCEPTIONS)
|
| 1070 |
if (loglevel) {
|
| 1071 |
fprintf(logfile, "ISI exception: msr=0x%08x, nip=0x%08x\n",
|
| 1072 |
msr, env->nip); |
| 1073 |
} else {
|
| 1074 |
printf("ISI exception: msr=0x%08x, nip=0x%08x tbl:0x%08x\n",
|
| 1075 |
msr, env->nip, env->spr[V_TBL]); |
| 1076 |
} |
| 1077 |
#endif
|
| 1078 |
goto store_next;
|
| 1079 |
case EXCP_EXTERNAL:
|
| 1080 |
if (msr_ee == 0) { |
| 1081 |
#if defined (DEBUG_EXCEPTIONS)
|
| 1082 |
if (loglevel > 0) { |
| 1083 |
fprintf(logfile, "Skipping hardware interrupt\n");
|
| 1084 |
} |
| 1085 |
#endif
|
| 1086 |
/* Requeue it */
|
| 1087 |
do_raise_exception(EXCP_EXTERNAL); |
| 1088 |
return;
|
| 1089 |
} |
| 1090 |
goto store_next;
|
| 1091 |
case EXCP_ALIGN:
|
| 1092 |
/* Store exception cause */
|
| 1093 |
/* Get rS/rD and rA from faulting opcode */
|
| 1094 |
env->spr[SPR_DSISR] |= |
| 1095 |
(ldl_code((env->nip - 4)) & 0x03FF0000) >> 16; |
| 1096 |
/* data location address has been stored
|
| 1097 |
* when the fault has been detected
|
| 1098 |
*/
|
| 1099 |
goto store_current;
|
| 1100 |
case EXCP_PROGRAM:
|
| 1101 |
msr &= ~0xFFFF0000;
|
| 1102 |
switch (env->error_code & ~0xF) { |
| 1103 |
case EXCP_FP:
|
| 1104 |
if (msr_fe0 == 0 && msr_fe1 == 0) { |
| 1105 |
#if defined (DEBUG_EXCEPTIONS)
|
| 1106 |
printf("Ignore floating point exception\n");
|
| 1107 |
#endif
|
| 1108 |
return;
|
| 1109 |
} |
| 1110 |
msr |= 0x00100000;
|
| 1111 |
/* Set FX */
|
| 1112 |
env->fpscr[7] |= 0x8; |
| 1113 |
/* Finally, update FEX */
|
| 1114 |
if ((((env->fpscr[7] & 0x3) << 3) | (env->fpscr[6] >> 1)) & |
| 1115 |
((env->fpscr[1] << 1) | (env->fpscr[0] >> 3))) |
| 1116 |
env->fpscr[7] |= 0x4; |
| 1117 |
break;
|
| 1118 |
case EXCP_INVAL:
|
| 1119 |
// printf("Invalid instruction at 0x%08x\n", env->nip);
|
| 1120 |
msr |= 0x00080000;
|
| 1121 |
break;
|
| 1122 |
case EXCP_PRIV:
|
| 1123 |
msr |= 0x00040000;
|
| 1124 |
break;
|
| 1125 |
case EXCP_TRAP:
|
| 1126 |
msr |= 0x00020000;
|
| 1127 |
break;
|
| 1128 |
default:
|
| 1129 |
/* Should never occur */
|
| 1130 |
break;
|
| 1131 |
} |
| 1132 |
msr |= 0x00010000;
|
| 1133 |
goto store_current;
|
| 1134 |
case EXCP_NO_FP:
|
| 1135 |
msr &= ~0xFFFF0000;
|
| 1136 |
goto store_current;
|
| 1137 |
case EXCP_DECR:
|
| 1138 |
if (msr_ee == 0) { |
| 1139 |
/* Requeue it */
|
| 1140 |
do_raise_exception(EXCP_DECR); |
| 1141 |
return;
|
| 1142 |
} |
| 1143 |
goto store_next;
|
| 1144 |
case EXCP_SYSCALL:
|
| 1145 |
/* NOTE: this is a temporary hack to support graphics OSI
|
| 1146 |
calls from the MOL driver */
|
| 1147 |
if (env->gpr[3] == 0x113724fa && env->gpr[4] == 0x77810f9b && |
| 1148 |
env->osi_call) {
|
| 1149 |
if (env->osi_call(env) != 0) |
| 1150 |
return;
|
| 1151 |
} |
| 1152 |
if (loglevel & CPU_LOG_INT) {
|
| 1153 |
dump_syscall(env); |
| 1154 |
} |
| 1155 |
goto store_next;
|
| 1156 |
case EXCP_TRACE:
|
| 1157 |
goto store_next;
|
| 1158 |
case EXCP_FP_ASSIST:
|
| 1159 |
goto store_next;
|
| 1160 |
case EXCP_MTMSR:
|
| 1161 |
/* Nothing to do */
|
| 1162 |
return;
|
| 1163 |
case EXCP_BRANCH:
|
| 1164 |
/* Nothing to do */
|
| 1165 |
return;
|
| 1166 |
case EXCP_RFI:
|
| 1167 |
/* Restore user-mode state */
|
| 1168 |
#if defined (DEBUG_EXCEPTIONS)
|
| 1169 |
if (msr_pr == 1) |
| 1170 |
printf("Return from exception => 0x%08x\n", (uint32_t)env->nip);
|
| 1171 |
#endif
|
| 1172 |
return;
|
| 1173 |
store_current:
|
| 1174 |
/* SRR0 is set to current instruction */
|
| 1175 |
env->spr[SPR_SRR0] = (uint32_t)env->nip - 4;
|
| 1176 |
break;
|
| 1177 |
store_next:
|
| 1178 |
/* SRR0 is set to next instruction */
|
| 1179 |
env->spr[SPR_SRR0] = (uint32_t)env->nip; |
| 1180 |
break;
|
| 1181 |
} |
| 1182 |
env->spr[SPR_SRR1] = msr; |
| 1183 |
/* reload MSR with correct bits */
|
| 1184 |
msr_pow = 0;
|
| 1185 |
msr_ee = 0;
|
| 1186 |
msr_pr = 0;
|
| 1187 |
msr_fp = 0;
|
| 1188 |
msr_fe0 = 0;
|
| 1189 |
msr_se = 0;
|
| 1190 |
msr_be = 0;
|
| 1191 |
msr_fe1 = 0;
|
| 1192 |
msr_ir = 0;
|
| 1193 |
msr_dr = 0;
|
| 1194 |
msr_ri = 0;
|
| 1195 |
msr_le = msr_ile; |
| 1196 |
do_compute_hflags(env); |
| 1197 |
/* Jump to handler */
|
| 1198 |
env->nip = excp << 8;
|
| 1199 |
env->exception_index = EXCP_NONE; |
| 1200 |
/* Invalidate all TLB as we may have changed translation mode */
|
| 1201 |
#ifdef ACCURATE_TLB_FLUSH
|
| 1202 |
tlb_flush(env, 1);
|
| 1203 |
#endif
|
| 1204 |
/* ensure that no TB jump will be modified as
|
| 1205 |
the program flow was changed */
|
| 1206 |
#ifdef __sparc__
|
| 1207 |
tmp_T0 = 0;
|
| 1208 |
#else
|
| 1209 |
T0 = 0;
|
| 1210 |
#endif
|
| 1211 |
env->exception_index = -1;
|
| 1212 |
} |
| 1213 |
#endif /* !CONFIG_USER_ONLY */ |