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qemu/target-tricore/cpu.h
Bastian Koppelmann 40a1f64b46 target-tricore: Fix bugs found by coverity 
This fixes one bug and one false positive found by coverity. The bug is,
that gen_mtcr was missing a mask to check the flag, which resulted in dead code.

The false positive is a intentional missing break for a jump and link address
insn followed by a jump and link insn. This adds a fall through comment to avoid
the false positive in the future.

Reported-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
2015-01-26 19:56:45 +00:00

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/*
* TriCore emulation for qemu: main CPU struct.
*
* Copyright (c) 2012-2014 Bastian Koppelmann C-Lab/University Paderborn
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#if !defined(__TRICORE_CPU_H__)
#define __TRICORE_CPU_H__
#include "tricore-defs.h"
#include "config.h"
#include "qemu-common.h"
#include "exec/cpu-defs.h"
#include "fpu/softfloat.h"
#define ELF_MACHINE EM_TRICORE
#define CPUArchState struct CPUTriCoreState
struct CPUTriCoreState;
struct tricore_boot_info;
#define NB_MMU_MODES 3
typedef struct tricore_def_t tricore_def_t;
typedef struct CPUTriCoreState CPUTriCoreState;
struct CPUTriCoreState {
/* GPR Register */
uint32_t gpr_a[16];
uint32_t gpr_d[16];
/* CSFR Register */
uint32_t PCXI;
/* Frequently accessed PSW_USB bits are stored separately for efficiency.
This contains all the other bits. Use psw_{read,write} to access
the whole PSW. */
uint32_t PSW;
/* PSW flag cache for faster execution
*/
uint32_t PSW_USB_C;
uint32_t PSW_USB_V; /* Only if bit 31 set, then flag is set */
uint32_t PSW_USB_SV; /* Only if bit 31 set, then flag is set */
uint32_t PSW_USB_AV; /* Only if bit 31 set, then flag is set. */
uint32_t PSW_USB_SAV; /* Only if bit 31 set, then flag is set. */
uint32_t PC;
uint32_t SYSCON;
uint32_t CPU_ID;
uint32_t BIV;
uint32_t BTV;
uint32_t ISP;
uint32_t ICR;
uint32_t FCX;
uint32_t LCX;
uint32_t COMPAT;
/* Mem Protection Register */
uint32_t DPR0_0L;
uint32_t DPR0_0U;
uint32_t DPR0_1L;
uint32_t DPR0_1U;
uint32_t DPR0_2L;
uint32_t DPR0_2U;
uint32_t DPR0_3L;
uint32_t DPR0_3U;
uint32_t DPR1_0L;
uint32_t DPR1_0U;
uint32_t DPR1_1L;
uint32_t DPR1_1U;
uint32_t DPR1_2L;
uint32_t DPR1_2U;
uint32_t DPR1_3L;
uint32_t DPR1_3U;
uint32_t DPR2_0L;
uint32_t DPR2_0U;
uint32_t DPR2_1L;
uint32_t DPR2_1U;
uint32_t DPR2_2L;
uint32_t DPR2_2U;
uint32_t DPR2_3L;
uint32_t DPR2_3U;
uint32_t DPR3_0L;
uint32_t DPR3_0U;
uint32_t DPR3_1L;
uint32_t DPR3_1U;
uint32_t DPR3_2L;
uint32_t DPR3_2U;
uint32_t DPR3_3L;
uint32_t DPR3_3U;
uint32_t CPR0_0L;
uint32_t CPR0_0U;
uint32_t CPR0_1L;
uint32_t CPR0_1U;
uint32_t CPR0_2L;
uint32_t CPR0_2U;
uint32_t CPR0_3L;
uint32_t CPR0_3U;
uint32_t CPR1_0L;
uint32_t CPR1_0U;
uint32_t CPR1_1L;
uint32_t CPR1_1U;
uint32_t CPR1_2L;
uint32_t CPR1_2U;
uint32_t CPR1_3L;
uint32_t CPR1_3U;
uint32_t CPR2_0L;
uint32_t CPR2_0U;
uint32_t CPR2_1L;
uint32_t CPR2_1U;
uint32_t CPR2_2L;
uint32_t CPR2_2U;
uint32_t CPR2_3L;
uint32_t CPR2_3U;
uint32_t CPR3_0L;
uint32_t CPR3_0U;
uint32_t CPR3_1L;
uint32_t CPR3_1U;
uint32_t CPR3_2L;
uint32_t CPR3_2U;
uint32_t CPR3_3L;
uint32_t CPR3_3U;
uint32_t DPM0;
uint32_t DPM1;
uint32_t DPM2;
uint32_t DPM3;
uint32_t CPM0;
uint32_t CPM1;
uint32_t CPM2;
uint32_t CPM3;
/* Memory Management Registers */
uint32_t MMU_CON;
uint32_t MMU_ASI;
uint32_t MMU_TVA;
uint32_t MMU_TPA;
uint32_t MMU_TPX;
uint32_t MMU_TFA;
/* {1.3.1 only */
uint32_t BMACON;
uint32_t SMACON;
uint32_t DIEAR;
uint32_t DIETR;
uint32_t CCDIER;
uint32_t MIECON;
uint32_t PIEAR;
uint32_t PIETR;
uint32_t CCPIER;
/*} */
/* Debug Registers */
uint32_t DBGSR;
uint32_t EXEVT;
uint32_t CREVT;
uint32_t SWEVT;
uint32_t TR0EVT;
uint32_t TR1EVT;
uint32_t DMS;
uint32_t DCX;
uint32_t DBGTCR;
uint32_t CCTRL;
uint32_t CCNT;
uint32_t ICNT;
uint32_t M1CNT;
uint32_t M2CNT;
uint32_t M3CNT;
/* Floating Point Registers */
/* XXX: */
/* QEMU */
int error_code;
uint32_t hflags; /* CPU State */
CPU_COMMON
/* Internal CPU feature flags. */
uint64_t features;
const tricore_def_t *cpu_model;
void *irq[8];
struct QEMUTimer *timer; /* Internal timer */
};
#define MASK_PCXI_PCPN 0xff000000
#define MASK_PCXI_PIE 0x00800000
#define MASK_PCXI_UL 0x00400000
#define MASK_PCXI_PCXS 0x000f0000
#define MASK_PCXI_PCXO 0x0000ffff
#define MASK_PSW_USB 0xff000000
#define MASK_USB_C 0x80000000
#define MASK_USB_V 0x40000000
#define MASK_USB_SV 0x20000000
#define MASK_USB_AV 0x10000000
#define MASK_USB_SAV 0x08000000
#define MASK_PSW_PRS 0x00003000
#define MASK_PSW_IO 0x00000c00
#define MASK_PSW_IS 0x00000200
#define MASK_PSW_GW 0x00000100
#define MASK_PSW_CDE 0x00000080
#define MASK_PSW_CDC 0x0000007f
#define MASK_SYSCON_PRO_TEN 0x2
#define MASK_SYSCON_FCD_SF 0x1
#define MASK_CPUID_MOD 0xffff0000
#define MASK_CPUID_MOD_32B 0x0000ff00
#define MASK_CPUID_REV 0x000000ff
#define MASK_ICR_PIPN 0x00ff0000
#define MASK_ICR_IE 0x00000100
#define MASK_ICR_CCPN 0x000000ff
#define MASK_FCX_FCXS 0x000f0000
#define MASK_FCX_FCXO 0x0000ffff
#define MASK_LCX_LCXS 0x000f0000
#define MASK_LCX_LCX0 0x0000ffff
#define TRICORE_HFLAG_KUU 0x3
#define TRICORE_HFLAG_UM0 0x00002 /* user mode-0 flag */
#define TRICORE_HFLAG_UM1 0x00001 /* user mode-1 flag */
#define TRICORE_HFLAG_SM 0x00000 /* kernel mode flag */
enum tricore_features {
TRICORE_FEATURE_13,
TRICORE_FEATURE_131,
TRICORE_FEATURE_16,
};
static inline int tricore_feature(CPUTriCoreState *env, int feature)
{
return (env->features & (1ULL << feature)) != 0;
}
/* TriCore Traps Classes*/
enum {
TRAPC_NONE = -1,
TRAPC_MMU = 0,
TRAPC_PROT = 1,
TRAPC_INSN_ERR = 2,
TRAPC_CTX_MNG = 3,
TRAPC_SYSBUS = 4,
TRAPC_ASSERT = 5,
TRAPC_SYSCALL = 6,
TRAPC_NMI = 7,
};
/* Class 0 TIN */
enum {
TIN0_VAF = 0,
TIN0_VAP = 1,
};
/* Class 1 TIN */
enum {
TIN1_PRIV = 1,
TIN1_MPR = 2,
TIN1_MPW = 3,
TIN1_MPX = 4,
TIN1_MPP = 5,
TIN1_MPN = 6,
TIN1_GRWP = 7,
};
/* Class 2 TIN */
enum {
TIN2_IOPC = 1,
TIN2_UOPC = 2,
TIN2_OPD = 3,
TIN2_ALN = 4,
TIN2_MEM = 5,
};
/* Class 3 TIN */
enum {
TIN3_FCD = 1,
TIN3_CDO = 2,
TIN3_CDU = 3,
TIN3_FCU = 4,
TIN3_CSU = 5,
TIN3_CTYP = 6,
TIN3_NEST = 7,
};
/* Class 4 TIN */
enum {
TIN4_PSE = 1,
TIN4_DSE = 2,
TIN4_DAE = 3,
TIN4_CAE = 4,
TIN4_PIE = 5,
TIN4_DIE = 6,
};
/* Class 5 TIN */
enum {
TIN5_OVF = 1,
TIN5_SOVF = 1,
};
/* Class 6 TIN
*
* Is always TIN6_SYS
*/
/* Class 7 TIN */
enum {
TIN7_NMI = 0,
};
uint32_t psw_read(CPUTriCoreState *env);
void psw_write(CPUTriCoreState *env, uint32_t val);
#include "cpu-qom.h"
#define MMU_USER_IDX 2
void tricore_cpu_list(FILE *f, fprintf_function cpu_fprintf);
#define cpu_exec cpu_tricore_exec
#define cpu_signal_handler cpu_tricore_signal_handler
#define cpu_list tricore_cpu_list
static inline int cpu_mmu_index(CPUTriCoreState *env)
{
return 0;
}
#include "exec/cpu-all.h"
enum {
/* 1 bit to define user level / supervisor access */
ACCESS_USER = 0x00,
ACCESS_SUPER = 0x01,
/* 1 bit to indicate direction */
ACCESS_STORE = 0x02,
/* Type of instruction that generated the access */
ACCESS_CODE = 0x10, /* Code fetch access */
ACCESS_INT = 0x20, /* Integer load/store access */
ACCESS_FLOAT = 0x30, /* floating point load/store access */
};
void cpu_state_reset(CPUTriCoreState *s);
int cpu_tricore_exec(CPUTriCoreState *s);
void tricore_tcg_init(void);
int cpu_tricore_signal_handler(int host_signum, void *pinfo, void *puc);
static inline void cpu_get_tb_cpu_state(CPUTriCoreState *env, target_ulong *pc,
target_ulong *cs_base, int *flags)
{
*pc = env->PC;
*cs_base = 0;
*flags = 0;
}
TriCoreCPU *cpu_tricore_init(const char *cpu_model);
static inline CPUTriCoreState *cpu_init(const char *cpu_model)
{
TriCoreCPU *cpu = cpu_tricore_init(cpu_model);
if (cpu == NULL) {
return NULL;
}
return &cpu->env;
}
/* helpers.c */
int cpu_tricore_handle_mmu_fault(CPUState *cpu, target_ulong address,
int rw, int mmu_idx);
#define cpu_handle_mmu_fault cpu_tricore_handle_mmu_fault
#include "exec/exec-all.h"
static inline void cpu_pc_from_tb(CPUTriCoreState *env, TranslationBlock *tb)
{
env->PC = tb->pc;
}
#endif /*__TRICORE_CPU_H__ */
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