soft mmu support
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@349 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard
parent
0f0b726444
commit
ab93bbe2ae
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@ -0,0 +1,84 @@
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#ifndef BSWAP_H
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#define BSWAP_H
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#include "config-host.h"
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#include <inttypes.h>
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#ifdef HAVE_BYTESWAP_H
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#include <byteswap.h>
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#else
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#define bswap_16(x) \
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({ \
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uint16_t __x = (x); \
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((uint16_t)( \
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(((uint16_t)(__x) & (uint16_t)0x00ffU) << 8) | \
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(((uint16_t)(__x) & (uint16_t)0xff00U) >> 8) )); \
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})
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#define bswap_32(x) \
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({ \
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uint32_t __x = (x); \
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((uint32_t)( \
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(((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \
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(((uint32_t)(__x) & (uint32_t)0x0000ff00UL) << 8) | \
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(((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >> 8) | \
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(((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) )); \
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})
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#define bswap_64(x) \
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({ \
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uint64_t __x = (x); \
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((uint64_t)( \
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(uint64_t)(((uint64_t)(__x) & (uint64_t)0x00000000000000ffULL) << 56) | \
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(uint64_t)(((uint64_t)(__x) & (uint64_t)0x000000000000ff00ULL) << 40) | \
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(uint64_t)(((uint64_t)(__x) & (uint64_t)0x0000000000ff0000ULL) << 24) | \
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(uint64_t)(((uint64_t)(__x) & (uint64_t)0x00000000ff000000ULL) << 8) | \
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(uint64_t)(((uint64_t)(__x) & (uint64_t)0x000000ff00000000ULL) >> 8) | \
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(uint64_t)(((uint64_t)(__x) & (uint64_t)0x0000ff0000000000ULL) >> 24) | \
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(uint64_t)(((uint64_t)(__x) & (uint64_t)0x00ff000000000000ULL) >> 40) | \
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(uint64_t)(((uint64_t)(__x) & (uint64_t)0xff00000000000000ULL) >> 56) )); \
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})
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#endif /* !HAVE_BYTESWAP_H */
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#if defined(__alpha__) || defined (__ia64__)
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#define HOST_LONG_BITS 64
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#else
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#define HOST_LONG_BITS 32
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#endif
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#define HOST_LONG_SIZE (HOST_LONG_BITS / 8)
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static inline uint16_t bswap16(uint16_t x)
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{
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return bswap_16(x);
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}
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static inline uint32_t bswap32(uint32_t x)
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{
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return bswap_32(x);
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}
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static inline uint64_t bswap64(uint64_t x)
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{
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return bswap_64(x);
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}
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static inline void bswap16s(uint16_t *s)
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{
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*s = bswap16(*s);
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}
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static inline void bswap32s(uint32_t *s)
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{
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*s = bswap32(*s);
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}
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static inline void bswap64s(uint64_t *s)
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{
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*s = bswap64(*s);
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}
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#endif /* BSWAP_H */
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/*
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* common defines for all CPUs
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*
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* Copyright (c) 2003 Fabrice Bellard
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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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#ifndef CPU_DEFS_H
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#define CPU_DEFS_H
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#include "config.h"
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#include <setjmp.h>
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#define EXCP_INTERRUPT 256 /* async interruption */
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#define EXCP_HLT 257 /* hlt instruction reached */
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#define EXCP_DEBUG 258 /* cpu stopped after a breakpoint or singlestep */
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#define MAX_BREAKPOINTS 32
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#define CPU_TLB_SIZE 256
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typedef struct CPUTLBEntry {
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uint32_t address;
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uint32_t addend;
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} CPUTLBEntry;
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#endif
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@ -0,0 +1,390 @@
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/*
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* i386 helpers (without register variable usage)
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*
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* Copyright (c) 2003 Fabrice Bellard
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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 <stdarg.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <inttypes.h>
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#include <signal.h>
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#include <assert.h>
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#include <sys/mman.h>
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#include "cpu-i386.h"
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#include "exec.h"
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//#define DEBUG_MMU
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CPUX86State *cpu_x86_init(void)
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{
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CPUX86State *env;
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int i;
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static int inited;
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cpu_exec_init();
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env = malloc(sizeof(CPUX86State));
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if (!env)
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return NULL;
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memset(env, 0, sizeof(CPUX86State));
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/* basic FPU init */
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for(i = 0;i < 8; i++)
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env->fptags[i] = 1;
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env->fpuc = 0x37f;
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/* flags setup : we activate the IRQs by default as in user mode */
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env->eflags = 0x2 | IF_MASK;
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tlb_flush(env);
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#ifdef CONFIG_SOFTMMU
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env->soft_mmu = 1;
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#endif
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/* init various static tables */
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if (!inited) {
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inited = 1;
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optimize_flags_init();
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}
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return env;
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}
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void cpu_x86_close(CPUX86State *env)
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{
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free(env);
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}
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/***********************************************************/
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/* x86 debug */
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static const char *cc_op_str[] = {
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"DYNAMIC",
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"EFLAGS",
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"MUL",
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"ADDB",
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"ADDW",
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"ADDL",
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"ADCB",
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"ADCW",
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"ADCL",
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"SUBB",
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"SUBW",
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"SUBL",
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"SBBB",
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"SBBW",
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"SBBL",
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"LOGICB",
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"LOGICW",
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"LOGICL",
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"INCB",
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"INCW",
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"INCL",
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"DECB",
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"DECW",
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"DECL",
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"SHLB",
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"SHLW",
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"SHLL",
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"SARB",
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"SARW",
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"SARL",
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};
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void cpu_x86_dump_state(CPUX86State *env, FILE *f, int flags)
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{
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int eflags;
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char cc_op_name[32];
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eflags = env->eflags;
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fprintf(f, "EAX=%08x EBX=%08x ECX=%08x EDX=%08x\n"
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"ESI=%08x EDI=%08x EBP=%08x ESP=%08x\n"
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"EIP=%08x EFL=%08x [%c%c%c%c%c%c%c]\n",
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env->regs[R_EAX], env->regs[R_EBX], env->regs[R_ECX], env->regs[R_EDX],
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env->regs[R_ESI], env->regs[R_EDI], env->regs[R_EBP], env->regs[R_ESP],
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env->eip, eflags,
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eflags & DF_MASK ? 'D' : '-',
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eflags & CC_O ? 'O' : '-',
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eflags & CC_S ? 'S' : '-',
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eflags & CC_Z ? 'Z' : '-',
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eflags & CC_A ? 'A' : '-',
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eflags & CC_P ? 'P' : '-',
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eflags & CC_C ? 'C' : '-');
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fprintf(f, "CS=%04x SS=%04x DS=%04x ES=%04x FS=%04x GS=%04x\n",
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env->segs[R_CS].selector,
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env->segs[R_SS].selector,
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env->segs[R_DS].selector,
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env->segs[R_ES].selector,
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env->segs[R_FS].selector,
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env->segs[R_GS].selector);
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if (flags & X86_DUMP_CCOP) {
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if ((unsigned)env->cc_op < CC_OP_NB)
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strcpy(cc_op_name, cc_op_str[env->cc_op]);
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else
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snprintf(cc_op_name, sizeof(cc_op_name), "[%d]", env->cc_op);
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fprintf(f, "CCS=%08x CCD=%08x CCO=%-8s\n",
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env->cc_src, env->cc_dst, cc_op_name);
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}
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if (flags & X86_DUMP_FPU) {
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fprintf(f, "ST0=%f ST1=%f ST2=%f ST3=%f\n",
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(double)env->fpregs[0],
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(double)env->fpregs[1],
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(double)env->fpregs[2],
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(double)env->fpregs[3]);
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fprintf(f, "ST4=%f ST5=%f ST6=%f ST7=%f\n",
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(double)env->fpregs[4],
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(double)env->fpregs[5],
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(double)env->fpregs[7],
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(double)env->fpregs[8]);
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}
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}
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/***********************************************************/
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/* x86 mmu */
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/* XXX: add PGE support */
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/* called when cr3 or PG bit are modified */
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static int last_pg_state = -1;
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static int last_pe_state = 0;
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int phys_ram_size;
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int phys_ram_fd;
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uint8_t *phys_ram_base;
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void cpu_x86_update_cr0(CPUX86State *env)
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{
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int pg_state, pe_state;
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#ifdef DEBUG_MMU
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printf("CR0 update: CR0=0x%08x\n", env->cr[0]);
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#endif
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pg_state = env->cr[0] & CR0_PG_MASK;
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if (pg_state != last_pg_state) {
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page_unmap();
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tlb_flush(env);
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last_pg_state = pg_state;
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}
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pe_state = env->cr[0] & CR0_PE_MASK;
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if (last_pe_state != pe_state) {
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tb_flush();
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last_pe_state = pe_state;
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}
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}
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void cpu_x86_update_cr3(CPUX86State *env)
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{
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if (env->cr[0] & CR0_PG_MASK) {
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#if defined(DEBUG_MMU)
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printf("CR3 update: CR3=%08x\n", env->cr[3]);
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#endif
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page_unmap();
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tlb_flush(env);
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}
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}
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void cpu_x86_init_mmu(CPUX86State *env)
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{
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last_pg_state = -1;
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cpu_x86_update_cr0(env);
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}
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/* XXX: also flush 4MB pages */
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void cpu_x86_flush_tlb(CPUX86State *env, uint32_t addr)
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{
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int flags;
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unsigned long virt_addr;
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tlb_flush_page(env, addr);
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flags = page_get_flags(addr);
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if (flags & PAGE_VALID) {
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virt_addr = addr & ~0xfff;
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munmap((void *)virt_addr, 4096);
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page_set_flags(virt_addr, virt_addr + 4096, 0);
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}
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}
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/* return value:
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-1 = cannot handle fault
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0 = nothing more to do
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1 = generate PF fault
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2 = soft MMU activation required for this block
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*/
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int cpu_x86_handle_mmu_fault(CPUX86State *env, uint32_t addr, int is_write)
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{
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uint8_t *pde_ptr, *pte_ptr;
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uint32_t pde, pte, virt_addr;
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int cpl, error_code, is_dirty, is_user, prot, page_size, ret;
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unsigned long pd;
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cpl = env->cpl;
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is_user = (cpl == 3);
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#ifdef DEBUG_MMU
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printf("MMU fault: addr=0x%08x w=%d u=%d eip=%08x\n",
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addr, is_write, is_user, env->eip);
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#endif
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if (env->user_mode_only) {
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/* user mode only emulation */
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error_code = 0;
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goto do_fault;
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}
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if (!(env->cr[0] & CR0_PG_MASK)) {
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pte = addr;
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virt_addr = addr & ~0xfff;
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prot = PROT_READ | PROT_WRITE;
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page_size = 4096;
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goto do_mapping;
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}
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/* page directory entry */
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pde_ptr = phys_ram_base + ((env->cr[3] & ~0xfff) + ((addr >> 20) & ~3));
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pde = ldl(pde_ptr);
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if (!(pde & PG_PRESENT_MASK)) {
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error_code = 0;
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goto do_fault;
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}
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if (is_user) {
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if (!(pde & PG_USER_MASK))
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goto do_fault_protect;
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if (is_write && !(pde & PG_RW_MASK))
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goto do_fault_protect;
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} else {
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if ((env->cr[0] & CR0_WP_MASK) && (pde & PG_USER_MASK) &&
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is_write && !(pde & PG_RW_MASK))
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goto do_fault_protect;
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}
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/* if PSE bit is set, then we use a 4MB page */
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if ((pde & PG_PSE_MASK) && (env->cr[4] & CR4_PSE_MASK)) {
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is_dirty = is_write && !(pde & PG_DIRTY_MASK);
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if (!(pde & PG_ACCESSED_MASK)) {
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pde |= PG_ACCESSED_MASK;
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if (is_dirty)
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pde |= PG_DIRTY_MASK;
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stl(pde_ptr, pde);
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}
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pte = pde & ~0x003ff000; /* align to 4MB */
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page_size = 4096 * 1024;
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virt_addr = addr & ~0x003fffff;
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} else {
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if (!(pde & PG_ACCESSED_MASK)) {
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pde |= PG_ACCESSED_MASK;
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stl(pde_ptr, pde);
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}
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/* page directory entry */
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pte_ptr = phys_ram_base + ((pde & ~0xfff) + ((addr >> 10) & 0xffc));
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pte = ldl(pte_ptr);
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if (!(pte & PG_PRESENT_MASK)) {
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error_code = 0;
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goto do_fault;
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}
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if (is_user) {
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if (!(pte & PG_USER_MASK))
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goto do_fault_protect;
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if (is_write && !(pte & PG_RW_MASK))
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goto do_fault_protect;
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} else {
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if ((env->cr[0] & CR0_WP_MASK) && (pte & PG_USER_MASK) &&
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is_write && !(pte & PG_RW_MASK))
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goto do_fault_protect;
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}
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is_dirty = is_write && !(pte & PG_DIRTY_MASK);
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if (!(pte & PG_ACCESSED_MASK) || is_dirty) {
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pte |= PG_ACCESSED_MASK;
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if (is_dirty)
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pte |= PG_DIRTY_MASK;
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stl(pte_ptr, pte);
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}
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page_size = 4096;
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virt_addr = addr & ~0xfff;
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}
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/* the page can be put in the TLB */
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prot = PROT_READ;
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if (is_user) {
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if (pte & PG_RW_MASK)
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prot |= PROT_WRITE;
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} else {
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if (!(env->cr[0] & CR0_WP_MASK) || !(pte & PG_USER_MASK) ||
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(pte & PG_RW_MASK))
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prot |= PROT_WRITE;
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}
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do_mapping:
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if (env->soft_mmu) {
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unsigned long paddr, vaddr, address, addend, page_offset;
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int index;
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|
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/* software MMU case. Even if 4MB pages, we map only one 4KB
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page in the cache to avoid filling it too fast */
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page_offset = (addr & ~0xfff) & (page_size - 1);
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paddr = (pte & ~0xfff) + page_offset;
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vaddr = virt_addr + page_offset;
|
||||
index = (addr >> 12) & (CPU_TLB_SIZE - 1);
|
||||
pd = physpage_find(paddr);
|
||||
if (pd & 0xfff) {
|
||||
/* IO memory case */
|
||||
address = vaddr | pd;
|
||||
addend = paddr;
|
||||
} else {
|
||||
/* standard memory */
|
||||
address = vaddr;
|
||||
addend = (unsigned long)phys_ram_base + pd;
|
||||
}
|
||||
addend -= vaddr;
|
||||
env->tlb_read[is_user][index].address = address;
|
||||
env->tlb_read[is_user][index].addend = addend;
|
||||
if (prot & PROT_WRITE) {
|
||||
env->tlb_write[is_user][index].address = address;
|
||||
env->tlb_write[is_user][index].addend = addend;
|
||||
}
|
||||
}
|
||||
ret = 0;
|
||||
/* XXX: incorrect for 4MB pages */
|
||||
pd = physpage_find(pte & ~0xfff);
|
||||
if ((pd & 0xfff) != 0) {
|
||||
/* IO access: no mapping is done as it will be handled by the
|
||||
soft MMU */
|
||||
if (!env->soft_mmu)
|
||||
ret = 2;
|
||||
} else {
|
||||
void *map_addr;
|
||||
map_addr = mmap((void *)virt_addr, page_size, prot,
|
||||
MAP_SHARED | MAP_FIXED, phys_ram_fd, pd);
|
||||
if (map_addr == MAP_FAILED) {
|
||||
fprintf(stderr,
|
||||
"mmap failed when mapped physical address 0x%08x to virtual address 0x%08x\n",
|
||||
pte & ~0xfff, virt_addr);
|
||||
exit(1);
|
||||
}
|
||||
#ifdef DEBUG_MMU
|
||||
printf("mmaping 0x%08x to virt 0x%08x pse=%d\n",
|
||||
pte & ~0xfff, virt_addr, (page_size != 4096));
|
||||
#endif
|
||||
page_set_flags(virt_addr, virt_addr + page_size,
|
||||
PAGE_VALID | PAGE_EXEC | prot);
|
||||
}
|
||||
return ret;
|
||||
do_fault_protect:
|
||||
error_code = PG_ERROR_P_MASK;
|
||||
do_fault:
|
||||
env->cr[2] = addr;
|
||||
env->error_code = (is_write << PG_ERROR_W_BIT) | error_code;
|
||||
if (is_user)
|
||||
env->error_code |= PG_ERROR_U_MASK;
|
||||
return 1;
|
||||
}
|
||||
|
|
@ -0,0 +1,66 @@
|
|||
void OPPROTO glue(glue(op_ldub, MEMSUFFIX), _T0_A0)(void)
|
||||
{
|
||||
T0 = glue(ldub, MEMSUFFIX)((uint8_t *)A0);
|
||||
}
|
||||
|
||||
void OPPROTO glue(glue(op_ldsb, MEMSUFFIX), _T0_A0)(void)
|
||||
{
|
||||
T0 = glue(ldsb, MEMSUFFIX)((int8_t *)A0);
|
||||
}
|
||||
|
||||
void OPPROTO glue(glue(op_lduw, MEMSUFFIX), _T0_A0)(void)
|
||||
{
|
||||
T0 = glue(lduw, MEMSUFFIX)((uint8_t *)A0);
|
||||
}
|
||||
|
||||
void OPPROTO glue(glue(op_ldsw, MEMSUFFIX), _T0_A0)(void)
|
||||
{
|
||||
T0 = glue(ldsw, MEMSUFFIX)((int8_t *)A0);
|
||||
}
|
||||
|
||||
void OPPROTO glue(glue(op_ldl, MEMSUFFIX), _T0_A0)(void)
|
||||
{
|
||||
T0 = glue(ldl, MEMSUFFIX)((uint8_t *)A0);
|
||||
}
|
||||
|
||||
void OPPROTO glue(glue(op_ldub, MEMSUFFIX), _T1_A0)(void)
|
||||
{
|
||||
T1 = glue(ldub, MEMSUFFIX)((uint8_t *)A0);
|
||||
}
|
||||
|
||||
void OPPROTO glue(glue(op_ldsb, MEMSUFFIX), _T1_A0)(void)
|
||||
{
|
||||
T1 = glue(ldsb, MEMSUFFIX)((int8_t *)A0);
|
||||
}
|
||||
|
||||
void OPPROTO glue(glue(op_lduw, MEMSUFFIX), _T1_A0)(void)
|
||||
{
|
||||
T1 = glue(lduw, MEMSUFFIX)((uint8_t *)A0);
|
||||
}
|
||||
|
||||
void OPPROTO glue(glue(op_ldsw, MEMSUFFIX), _T1_A0)(void)
|
||||
{
|
||||
T1 = glue(ldsw, MEMSUFFIX)((int8_t *)A0);
|
||||
}
|
||||
|
||||
void OPPROTO glue(glue(op_ldl, MEMSUFFIX), _T1_A0)(void)
|
||||
{
|
||||
T1 = glue(ldl, MEMSUFFIX)((uint8_t *)A0);
|
||||
}
|
||||
|
||||
void OPPROTO glue(glue(op_stb, MEMSUFFIX), _T0_A0)(void)
|
||||
{
|
||||
glue(stb, MEMSUFFIX)((uint8_t *)A0, T0);
|
||||
}
|
||||
|
||||
void OPPROTO glue(glue(op_stw, MEMSUFFIX), _T0_A0)(void)
|
||||
{
|
||||
glue(stw, MEMSUFFIX)((uint8_t *)A0, T0);
|
||||
}
|
||||
|
||||
void OPPROTO glue(glue(op_stl, MEMSUFFIX), _T0_A0)(void)
|
||||
{
|
||||
glue(stl, MEMSUFFIX)((uint8_t *)A0, T0);
|
||||
}
|
||||
|
||||
#undef MEMSUFFIX
|
||||
Loading…
Reference in New Issue