mirror of https://github.com/proxmox/mirror_qemu
S/390 CPU fake emulation
Because Qemu currently requires a TCG target to exist and there are quite some useful helpers here to lay the groundwork for out KVM target, let's create a stub TCG emulation target for S390X CPUs. This is required to make tcg happy. The emulation target itself won't work though. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>master
parent
2a90358f8a
commit
10ec51174c
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@ -249,6 +249,7 @@ int cpu_exec(CPUState *env1)
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#elif defined(TARGET_MIPS)
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#elif defined(TARGET_MIPS)
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#elif defined(TARGET_SH4)
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#elif defined(TARGET_SH4)
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#elif defined(TARGET_CRIS)
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#elif defined(TARGET_CRIS)
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#elif defined(TARGET_S390X)
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/* XXXXX */
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/* XXXXX */
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#else
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#else
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#error unsupported target CPU
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#error unsupported target CPU
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@ -673,6 +674,7 @@ int cpu_exec(CPUState *env1)
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#elif defined(TARGET_SH4)
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#elif defined(TARGET_SH4)
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#elif defined(TARGET_ALPHA)
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#elif defined(TARGET_ALPHA)
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#elif defined(TARGET_CRIS)
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#elif defined(TARGET_CRIS)
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#elif defined(TARGET_S390X)
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/* XXXXX */
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/* XXXXX */
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#else
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#else
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#error unsupported target CPU
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#error unsupported target CPU
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@ -0,0 +1,122 @@
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/*
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* S/390 virtual CPU header
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*
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* Copyright (c) 2009 Ulrich Hecht
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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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA
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*/
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#ifndef CPU_S390X_H
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#define CPU_S390X_H
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#define TARGET_LONG_BITS 64
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#define ELF_MACHINE EM_S390
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#define CPUState struct CPUS390XState
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#include "cpu-defs.h"
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#include "softfloat.h"
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#define NB_MMU_MODES 2 // guess
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#define MMU_USER_IDX 0 // guess
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typedef union FPReg {
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struct {
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#ifdef WORDS_BIGENDIAN
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float32 e;
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int32_t __pad;
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#else
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int32_t __pad;
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float32 e;
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#endif
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};
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float64 d;
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uint64_t i;
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} FPReg;
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typedef struct CPUS390XState {
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uint64_t regs[16]; /* GP registers */
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uint32_t aregs[16]; /* access registers */
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uint32_t fpc; /* floating-point control register */
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FPReg fregs[16]; /* FP registers */
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float_status fpu_status; /* passed to softfloat lib */
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struct {
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uint64_t mask;
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uint64_t addr;
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} psw;
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int cc; /* condition code (0-3) */
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uint64_t __excp_addr;
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CPU_COMMON
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} CPUS390XState;
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#if defined(CONFIG_USER_ONLY)
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static inline void cpu_clone_regs(CPUState *env, target_ulong newsp)
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{
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if (newsp)
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env->regs[15] = newsp;
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env->regs[0] = 0;
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}
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#endif
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CPUS390XState *cpu_s390x_init(const char *cpu_model);
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int cpu_s390x_exec(CPUS390XState *s);
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void cpu_s390x_close(CPUS390XState *s);
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/* you can call this signal handler from your SIGBUS and SIGSEGV
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signal handlers to inform the virtual CPU of exceptions. non zero
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is returned if the signal was handled by the virtual CPU. */
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int cpu_s390x_signal_handler(int host_signum, void *pinfo,
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void *puc);
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int cpu_s390x_handle_mmu_fault (CPUS390XState *env, target_ulong address, int rw,
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int mmu_idx, int is_softmuu);
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#define cpu_handle_mmu_fault cpu_s390x_handle_mmu_fault
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#define TARGET_PAGE_BITS 12
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#define cpu_init cpu_s390x_init
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#define cpu_exec cpu_s390x_exec
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#define cpu_gen_code cpu_s390x_gen_code
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#include "cpu-all.h"
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#include "exec-all.h"
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#define EXCP_OPEX 1 /* operation exception (sigill) */
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#define EXCP_SVC 2 /* supervisor call (syscall) */
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#define EXCP_ADDR 5 /* addressing exception */
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#define EXCP_EXECUTE_SVC 0xff00000 /* supervisor call via execute insn */
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static inline void cpu_pc_from_tb(CPUState *env, TranslationBlock* tb)
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{
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env->psw.addr = tb->pc;
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}
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static inline void cpu_get_tb_cpu_state(CPUState* env, target_ulong *pc,
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target_ulong *cs_base, int *flags)
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{
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*pc = env->psw.addr;
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/* XXX this is correct for user-mode emulation, but needs
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* the asce register information as well when softmmu
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* is implemented in the future */
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*cs_base = 0;
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*flags = env->psw.mask;
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}
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#endif
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@ -0,0 +1,51 @@
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/*
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* S/390 execution defines
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*
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* Copyright (c) 2009 Ulrich Hecht
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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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA
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*/
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#include "dyngen-exec.h"
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register struct CPUS390XState *env asm(AREG0);
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#include "cpu.h"
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#include "exec-all.h"
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static inline int cpu_has_work(CPUState *env)
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{
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return env->interrupt_request & CPU_INTERRUPT_HARD; // guess
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}
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static inline void regs_to_env(void)
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{
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}
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static inline void env_to_regs(void)
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{
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}
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static inline int cpu_halted(CPUState *env)
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{
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if (!env->halted) {
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return 0;
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}
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if (cpu_has_work(env)) {
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env->halted = 0;
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return 0;
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}
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return EXCP_HALTED;
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}
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@ -0,0 +1,62 @@
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/*
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* S/390 helpers
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*
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* Copyright (c) 2009 Ulrich Hecht
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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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "cpu.h"
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#include "exec-all.h"
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#include "gdbstub.h"
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#include "qemu-common.h"
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CPUS390XState *cpu_s390x_init(const char *cpu_model)
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{
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CPUS390XState *env;
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static int inited = 0;
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env = qemu_mallocz(sizeof(CPUS390XState));
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cpu_exec_init(env);
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if (!inited) {
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inited = 1;
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}
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env->cpu_model_str = cpu_model;
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cpu_reset(env);
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qemu_init_vcpu(env);
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return env;
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}
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target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
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{
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return addr;
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}
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void cpu_reset(CPUS390XState *env)
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{
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if (qemu_loglevel_mask(CPU_LOG_RESET)) {
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qemu_log("CPU Reset (CPU %d)\n", env->cpu_index);
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log_cpu_state(env, 0);
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}
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memset(env, 0, offsetof(CPUS390XState, breakpoints));
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/* FIXME: reset vector? */
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tlb_flush(env, 1);
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}
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@ -0,0 +1,74 @@
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/*
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* S/390 helper routines
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*
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* Copyright (c) 2009 Alexander Graf
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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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA
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*/
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#include "exec.h"
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/*****************************************************************************/
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/* Softmmu support */
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#if !defined (CONFIG_USER_ONLY)
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#define MMUSUFFIX _mmu
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#define SHIFT 0
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#include "softmmu_template.h"
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#define SHIFT 1
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#include "softmmu_template.h"
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#define SHIFT 2
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#include "softmmu_template.h"
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#define SHIFT 3
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#include "softmmu_template.h"
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/* try to fill the TLB and return an exception if error. If retaddr is
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NULL, it means that the function was called in C code (i.e. not
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from generated code or from helper.c) */
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/* XXX: fix it to restore all registers */
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void tlb_fill (target_ulong addr, int is_write, int mmu_idx, void *retaddr)
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{
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TranslationBlock *tb;
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CPUState *saved_env;
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unsigned long pc;
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int ret;
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/* XXX: hack to restore env in all cases, even if not called from
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generated code */
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saved_env = env;
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env = cpu_single_env;
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ret = cpu_s390x_handle_mmu_fault(env, addr, is_write, mmu_idx, 1);
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if (unlikely(ret != 0)) {
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if (likely(retaddr)) {
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/* now we have a real cpu fault */
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pc = (unsigned long)retaddr;
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tb = tb_find_pc(pc);
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if (likely(tb)) {
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/* the PC is inside the translated code. It means that we have
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a virtual CPU fault */
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cpu_restore_state(tb, env, pc, NULL);
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}
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}
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/* XXX */
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/* helper_raise_exception_err(env->exception_index, env->error_code); */
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}
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env = saved_env;
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}
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#endif
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@ -0,0 +1,63 @@
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/*
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* S/390 translation
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*
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* Copyright (c) 2009 Ulrich Hecht
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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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|
* You should have received a copy of the GNU Lesser General Public
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||||||
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* License along with this library; if not, write to the Free Software
|
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA
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*/
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#include "cpu.h"
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#include "exec-all.h"
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#include "disas.h"
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#include "tcg-op.h"
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#include "qemu-log.h"
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void cpu_dump_state(CPUState *env, FILE *f,
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int (*cpu_fprintf)(FILE *f, const char *fmt, ...),
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int flags)
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{
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int i;
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for (i = 0; i < 16; i++) {
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cpu_fprintf(f, "R%02d=%016lx", i, env->regs[i]);
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if ((i % 4) == 3) {
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cpu_fprintf(f, "\n");
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} else {
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cpu_fprintf(f, " ");
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}
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}
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for (i = 0; i < 16; i++) {
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cpu_fprintf(f, "F%02d=%016lx", i, env->fregs[i]);
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if ((i % 4) == 3) {
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cpu_fprintf(f, "\n");
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} else {
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cpu_fprintf(f, " ");
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}
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}
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cpu_fprintf(f, "PSW=mask %016lx addr %016lx cc %02x\n", env->psw.mask, env->psw.addr, env->cc);
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}
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void gen_intermediate_code (CPUState *env, struct TranslationBlock *tb)
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{
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}
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void gen_intermediate_code_pc (CPUState *env, struct TranslationBlock *tb)
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{
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}
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||||||
|
void gen_pc_load(CPUState *env, TranslationBlock *tb,
|
||||||
|
unsigned long searched_pc, int pc_pos, void *puc)
|
||||||
|
{
|
||||||
|
env->psw.addr = gen_opc_pc[pc_pos];
|
||||||
|
}
|
Loading…
Reference in New Issue