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/*
* SH4 emulation
*
* Copyright (c) 2005 Samuel Tardieu
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _CPU_SH4_H
#define _CPU_SH4_H
#include "config.h"
#define TARGET_LONG_BITS 32
#define TARGET_HAS_ICE 1
#define ELF_MACHINE EM_SH
#include "cpu-defs.h"
#include "softfloat.h"
#define TARGET_PAGE_BITS 12 /* 4k XXXXX */
#define SR_MD (1 << 30)
#define SR_RB (1 << 29)
#define SR_BL (1 << 28)
#define SR_FD (1 << 15)
#define SR_M (1 << 9)
#define SR_Q (1 << 8)
#define SR_S (1 << 1)
#define SR_T (1 << 0)
#define FPSCR_FR (1 << 21)
#define FPSCR_SZ (1 << 20)
#define FPSCR_PR (1 << 19)
#define FPSCR_DN (1 << 18)
#define DELAY_SLOT (1 << 0)
#define DELAY_SLOT_CONDITIONAL (1 << 1)
#define DELAY_SLOT_TRUE (1 << 2)
#define DELAY_SLOT_CLEARME (1 << 3)
/* The dynamic value of the DELAY_SLOT_TRUE flag determines whether the jump
* after the delay slot should be taken or not. It is calculated from SR_T.
*
* It is unclear if it is permitted to modify the SR_T flag in a delay slot.
* The use of DELAY_SLOT_TRUE flag makes us accept such SR_T modification.
*/
/* XXXXX The structure could be made more compact */
typedef struct tlb_t {
uint8_t asid; /* address space identifier */
uint32_t vpn; /* virtual page number */
uint8_t v; /* validity */
uint32_t ppn; /* physical page number */
uint8_t sz; /* page size */
uint32_t size; /* cached page size in bytes */
uint8_t sh; /* share status */
uint8_t c; /* cacheability */
uint8_t pr; /* protection key */
uint8_t d; /* dirty */
uint8_t wt; /* write through */
uint8_t sa; /* space attribute (PCMCIA) */
uint8_t tc; /* timing control */
} tlb_t;
#define UTLB_SIZE 64
#define ITLB_SIZE 4
#define NB_MMU_MODES 2
typedef struct CPUSH4State {
uint32_t flags; /* general execution flags */
uint32_t gregs[24]; /* general registers */
float32 fregs[32]; /* floating point registers */
uint32_t sr; /* status register */
uint32_t ssr; /* saved status register */
uint32_t spc; /* saved program counter */
uint32_t gbr; /* global base register */
uint32_t vbr; /* vector base register */
uint32_t sgr; /* saved global register 15 */
uint32_t dbr; /* debug base register */
uint32_t pc; /* program counter */
uint32_t delayed_pc; /* target of delayed jump */
uint32_t mach; /* multiply and accumulate high */
uint32_t macl; /* multiply and accumulate low */
uint32_t pr; /* procedure register */
uint32_t fpscr; /* floating point status/control register */
uint32_t fpul; /* floating point communication register */
/* temporary float registers */
float32 ft0, ft1;
float64 dt0, dt1;
float_status fp_status;
/* Those belong to the specific unit (SH7750) but are handled here */
uint32_t mmucr; /* MMU control register */
uint32_t pteh; /* page table entry high register */
uint32_t ptel; /* page table entry low register */
uint32_t ptea; /* page table entry assistance register */
uint32_t ttb; /* tranlation table base register */
uint32_t tea; /* TLB exception address register */
uint32_t tra; /* TRAPA exception register */
uint32_t expevt; /* exception event register */
uint32_t intevt; /* interrupt event register */
jmp_buf jmp_env;
int user_mode_only;
int interrupt_request;
int halted;
int exception_index;
CPU_COMMON tlb_t utlb[UTLB_SIZE]; /* unified translation table */
tlb_t itlb[ITLB_SIZE]; /* instruction translation table */
} CPUSH4State;
CPUSH4State *cpu_sh4_init(const char *cpu_model);
int cpu_sh4_exec(CPUSH4State * s);
int cpu_sh4_signal_handler(int host_signum, void *pinfo,
void *puc);
#include "softfloat.h"
#define CPUState CPUSH4State
#define cpu_init cpu_sh4_init
#define cpu_exec cpu_sh4_exec
#define cpu_gen_code cpu_sh4_gen_code
#define cpu_signal_handler cpu_sh4_signal_handler
/* MMU modes definitions */
#define MMU_MODE0_SUFFIX _kernel
#define MMU_MODE1_SUFFIX _user
#define MMU_USER_IDX 1
static inline int cpu_mmu_index (CPUState *env)
{
return (env->sr & SR_MD) == 0 ? 1 : 0;
}
#include "cpu-all.h"
/* Memory access type */
enum {
/* Privilege */
ACCESS_PRIV = 0x01,
/* Direction */
ACCESS_WRITE = 0x02,
/* Type of instruction */
ACCESS_CODE = 0x10,
ACCESS_INT = 0x20
};
/* MMU control register */
#define MMUCR 0x1F000010
#define MMUCR_AT (1<<0)
#define MMUCR_SV (1<<8)
#endif /* _CPU_SH4_H */
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