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>
123 lines
3.4 KiB
C
123 lines
3.4 KiB
C
/*
|
|
* S/390 virtual CPU header
|
|
*
|
|
* Copyright (c) 2009 Ulrich Hecht
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA
|
|
*/
|
|
#ifndef CPU_S390X_H
|
|
#define CPU_S390X_H
|
|
|
|
#define TARGET_LONG_BITS 64
|
|
|
|
#define ELF_MACHINE EM_S390
|
|
|
|
#define CPUState struct CPUS390XState
|
|
|
|
#include "cpu-defs.h"
|
|
|
|
#include "softfloat.h"
|
|
|
|
#define NB_MMU_MODES 2 // guess
|
|
#define MMU_USER_IDX 0 // guess
|
|
|
|
typedef union FPReg {
|
|
struct {
|
|
#ifdef WORDS_BIGENDIAN
|
|
float32 e;
|
|
int32_t __pad;
|
|
#else
|
|
int32_t __pad;
|
|
float32 e;
|
|
#endif
|
|
};
|
|
float64 d;
|
|
uint64_t i;
|
|
} FPReg;
|
|
|
|
typedef struct CPUS390XState {
|
|
uint64_t regs[16]; /* GP registers */
|
|
|
|
uint32_t aregs[16]; /* access registers */
|
|
|
|
uint32_t fpc; /* floating-point control register */
|
|
FPReg fregs[16]; /* FP registers */
|
|
float_status fpu_status; /* passed to softfloat lib */
|
|
|
|
struct {
|
|
uint64_t mask;
|
|
uint64_t addr;
|
|
} psw;
|
|
|
|
int cc; /* condition code (0-3) */
|
|
|
|
uint64_t __excp_addr;
|
|
|
|
CPU_COMMON
|
|
} CPUS390XState;
|
|
|
|
#if defined(CONFIG_USER_ONLY)
|
|
static inline void cpu_clone_regs(CPUState *env, target_ulong newsp)
|
|
{
|
|
if (newsp)
|
|
env->regs[15] = newsp;
|
|
env->regs[0] = 0;
|
|
}
|
|
#endif
|
|
|
|
CPUS390XState *cpu_s390x_init(const char *cpu_model);
|
|
int cpu_s390x_exec(CPUS390XState *s);
|
|
void cpu_s390x_close(CPUS390XState *s);
|
|
|
|
/* you can call this signal handler from your SIGBUS and SIGSEGV
|
|
signal handlers to inform the virtual CPU of exceptions. non zero
|
|
is returned if the signal was handled by the virtual CPU. */
|
|
int cpu_s390x_signal_handler(int host_signum, void *pinfo,
|
|
void *puc);
|
|
int cpu_s390x_handle_mmu_fault (CPUS390XState *env, target_ulong address, int rw,
|
|
int mmu_idx, int is_softmuu);
|
|
#define cpu_handle_mmu_fault cpu_s390x_handle_mmu_fault
|
|
|
|
#define TARGET_PAGE_BITS 12
|
|
|
|
#define cpu_init cpu_s390x_init
|
|
#define cpu_exec cpu_s390x_exec
|
|
#define cpu_gen_code cpu_s390x_gen_code
|
|
|
|
#include "cpu-all.h"
|
|
#include "exec-all.h"
|
|
|
|
#define EXCP_OPEX 1 /* operation exception (sigill) */
|
|
#define EXCP_SVC 2 /* supervisor call (syscall) */
|
|
#define EXCP_ADDR 5 /* addressing exception */
|
|
#define EXCP_EXECUTE_SVC 0xff00000 /* supervisor call via execute insn */
|
|
|
|
static inline void cpu_pc_from_tb(CPUState *env, TranslationBlock* tb)
|
|
{
|
|
env->psw.addr = tb->pc;
|
|
}
|
|
|
|
static inline void cpu_get_tb_cpu_state(CPUState* env, target_ulong *pc,
|
|
target_ulong *cs_base, int *flags)
|
|
{
|
|
*pc = env->psw.addr;
|
|
/* XXX this is correct for user-mode emulation, but needs
|
|
* the asce register information as well when softmmu
|
|
* is implemented in the future */
|
|
*cs_base = 0;
|
|
*flags = env->psw.mask;
|
|
}
|
|
#endif
|