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qemu-e2k/target/sh4/cpu.h
Richard Henderson fa947a667f hw/core: Make do_unaligned_access noreturn 
While we may have had some thought of allowing system-mode
to return from this hook, we have no guests that require this.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-09-21 19:36:44 -07:00

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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 2.1 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/>.
*/
#ifndef SH4_CPU_H
#define SH4_CPU_H
#include "cpu-qom.h"
#include "exec/cpu-defs.h"
/* CPU Subtypes */
#define SH_CPU_SH7750 (1 << 0)
#define SH_CPU_SH7750S (1 << 1)
#define SH_CPU_SH7750R (1 << 2)
#define SH_CPU_SH7751 (1 << 3)
#define SH_CPU_SH7751R (1 << 4)
#define SH_CPU_SH7785 (1 << 5)
#define SH_CPU_SH7750_ALL (SH_CPU_SH7750 | SH_CPU_SH7750S | SH_CPU_SH7750R)
#define SH_CPU_SH7751_ALL (SH_CPU_SH7751 | SH_CPU_SH7751R)
#define SR_MD 30
#define SR_RB 29
#define SR_BL 28
#define SR_FD 15
#define SR_M 9
#define SR_Q 8
#define SR_I3 7
#define SR_I2 6
#define SR_I1 5
#define SR_I0 4
#define SR_S 1
#define SR_T 0
#define FPSCR_MASK (0x003fffff)
#define FPSCR_FR (1 << 21)
#define FPSCR_SZ (1 << 20)
#define FPSCR_PR (1 << 19)
#define FPSCR_DN (1 << 18)
#define FPSCR_CAUSE_MASK (0x3f << 12)
#define FPSCR_CAUSE_SHIFT (12)
#define FPSCR_CAUSE_E (1 << 17)
#define FPSCR_CAUSE_V (1 << 16)
#define FPSCR_CAUSE_Z (1 << 15)
#define FPSCR_CAUSE_O (1 << 14)
#define FPSCR_CAUSE_U (1 << 13)
#define FPSCR_CAUSE_I (1 << 12)
#define FPSCR_ENABLE_MASK (0x1f << 7)
#define FPSCR_ENABLE_SHIFT (7)
#define FPSCR_ENABLE_V (1 << 11)
#define FPSCR_ENABLE_Z (1 << 10)
#define FPSCR_ENABLE_O (1 << 9)
#define FPSCR_ENABLE_U (1 << 8)
#define FPSCR_ENABLE_I (1 << 7)
#define FPSCR_FLAG_MASK (0x1f << 2)
#define FPSCR_FLAG_SHIFT (2)
#define FPSCR_FLAG_V (1 << 6)
#define FPSCR_FLAG_Z (1 << 5)
#define FPSCR_FLAG_O (1 << 4)
#define FPSCR_FLAG_U (1 << 3)
#define FPSCR_FLAG_I (1 << 2)
#define FPSCR_RM_MASK (0x03 << 0)
#define FPSCR_RM_NEAREST (0 << 0)
#define FPSCR_RM_ZERO (1 << 0)
#define DELAY_SLOT_MASK 0x7
#define DELAY_SLOT (1 << 0)
#define DELAY_SLOT_CONDITIONAL (1 << 1)
#define DELAY_SLOT_RTE (1 << 2)
#define TB_FLAG_PENDING_MOVCA (1 << 3)
#define GUSA_SHIFT 4
#ifdef CONFIG_USER_ONLY
#define GUSA_EXCLUSIVE (1 << 12)
#define GUSA_MASK ((0xff << GUSA_SHIFT) | GUSA_EXCLUSIVE)
#else
/* Provide dummy versions of the above to allow tests against tbflags
to be elided while avoiding ifdefs. */
#define GUSA_EXCLUSIVE 0
#define GUSA_MASK 0
#endif
#define TB_FLAG_ENVFLAGS_MASK (DELAY_SLOT_MASK | GUSA_MASK)
typedef struct tlb_t {
uint32_t vpn; /* virtual page number */
uint32_t ppn; /* physical page number */
uint32_t size; /* mapped page size in bytes */
uint8_t asid; /* address space identifier */
uint8_t v:1; /* validity */
uint8_t sz:2; /* page size */
uint8_t sh:1; /* share status */
uint8_t c:1; /* cacheability */
uint8_t pr:2; /* protection key */
uint8_t d:1; /* dirty */
uint8_t wt:1; /* write through */
uint8_t sa:3; /* space attribute (PCMCIA) */
uint8_t tc:1; /* timing control */
} tlb_t;
#define UTLB_SIZE 64
#define ITLB_SIZE 4
#define TARGET_INSN_START_EXTRA_WORDS 1
enum sh_features {
SH_FEATURE_SH4A = 1,
SH_FEATURE_BCR3_AND_BCR4 = 2,
};
typedef struct memory_content {
uint32_t address;
uint32_t value;
struct memory_content *next;
} memory_content;
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 (with T split out) */
uint32_t sr_m; /* M bit of status register */
uint32_t sr_q; /* Q bit of status register */
uint32_t sr_t; /* T bit of 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 branch */
uint32_t delayed_cond; /* condition of delayed branch */
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 */
/* float point status register */
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; /* translation 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 */
tlb_t itlb[ITLB_SIZE]; /* instruction translation table */
tlb_t utlb[UTLB_SIZE]; /* unified translation table */
/* LDST = LOCK_ADDR != -1. */
uint32_t lock_addr;
uint32_t lock_value;
/* Fields up to this point are cleared by a CPU reset */
struct {} end_reset_fields;
/* Fields from here on are preserved over CPU reset. */
int id; /* CPU model */
/* The features that we should emulate. See sh_features above. */
uint32_t features;
void *intc_handle;
int in_sleep; /* SR_BL ignored during sleep */
memory_content *movcal_backup;
memory_content **movcal_backup_tail;
} CPUSH4State;
/**
* SuperHCPU:
* @env: #CPUSH4State
*
* A SuperH CPU.
*/
struct SuperHCPU {
/*< private >*/
CPUState parent_obj;
/*< public >*/
CPUNegativeOffsetState neg;
CPUSH4State env;
};
void superh_cpu_dump_state(CPUState *cpu, FILE *f, int flags);
hwaddr superh_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
int superh_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg);
int superh_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
void superh_cpu_do_unaligned_access(CPUState *cpu, vaddr addr,
MMUAccessType access_type, int mmu_idx,
uintptr_t retaddr) QEMU_NORETURN;
void sh4_translate_init(void);
bool superh_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
MMUAccessType access_type, int mmu_idx,
bool probe, uintptr_t retaddr);
void sh4_cpu_list(void);
#if !defined(CONFIG_USER_ONLY)
void superh_cpu_do_interrupt(CPUState *cpu);
bool superh_cpu_exec_interrupt(CPUState *cpu, int int_req);
void cpu_sh4_invalidate_tlb(CPUSH4State *s);
uint32_t cpu_sh4_read_mmaped_itlb_addr(CPUSH4State *s,
hwaddr addr);
void cpu_sh4_write_mmaped_itlb_addr(CPUSH4State *s, hwaddr addr,
uint32_t mem_value);
uint32_t cpu_sh4_read_mmaped_itlb_data(CPUSH4State *s,
hwaddr addr);
void cpu_sh4_write_mmaped_itlb_data(CPUSH4State *s, hwaddr addr,
uint32_t mem_value);
uint32_t cpu_sh4_read_mmaped_utlb_addr(CPUSH4State *s,
hwaddr addr);
void cpu_sh4_write_mmaped_utlb_addr(CPUSH4State *s, hwaddr addr,
uint32_t mem_value);
uint32_t cpu_sh4_read_mmaped_utlb_data(CPUSH4State *s,
hwaddr addr);
void cpu_sh4_write_mmaped_utlb_data(CPUSH4State *s, hwaddr addr,
uint32_t mem_value);
#endif
int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr);
void cpu_load_tlb(CPUSH4State * env);
#define SUPERH_CPU_TYPE_SUFFIX "-" TYPE_SUPERH_CPU
#define SUPERH_CPU_TYPE_NAME(model) model SUPERH_CPU_TYPE_SUFFIX
#define CPU_RESOLVING_TYPE TYPE_SUPERH_CPU
#define cpu_list sh4_cpu_list
/* MMU modes definitions */
#define MMU_USER_IDX 1
static inline int cpu_mmu_index (CPUSH4State *env, bool ifetch)
{
/* The instruction in a RTE delay slot is fetched in privileged
mode, but executed in user mode. */
if (ifetch && (env->flags & DELAY_SLOT_RTE)) {
return 0;
} else {
return (env->sr & (1u << SR_MD)) == 0 ? 1 : 0;
}
}
typedef CPUSH4State CPUArchState;
typedef SuperHCPU ArchCPU;
#include "exec/cpu-all.h"
/* MMU control register */
#define MMUCR 0x1F000010
#define MMUCR_AT (1<<0)
#define MMUCR_TI (1<<2)
#define MMUCR_SV (1<<8)
#define MMUCR_URC_BITS (6)
#define MMUCR_URC_OFFSET (10)
#define MMUCR_URC_SIZE (1 << MMUCR_URC_BITS)
#define MMUCR_URC_MASK (((MMUCR_URC_SIZE) - 1) << MMUCR_URC_OFFSET)
static inline int cpu_mmucr_urc (uint32_t mmucr)
{
return ((mmucr & MMUCR_URC_MASK) >> MMUCR_URC_OFFSET);
}
/* PTEH : Page Translation Entry High register */
#define PTEH_ASID_BITS (8)
#define PTEH_ASID_SIZE (1 << PTEH_ASID_BITS)
#define PTEH_ASID_MASK (PTEH_ASID_SIZE - 1)
#define cpu_pteh_asid(pteh) ((pteh) & PTEH_ASID_MASK)
#define PTEH_VPN_BITS (22)
#define PTEH_VPN_OFFSET (10)
#define PTEH_VPN_SIZE (1 << PTEH_VPN_BITS)
#define PTEH_VPN_MASK (((PTEH_VPN_SIZE) - 1) << PTEH_VPN_OFFSET)
static inline int cpu_pteh_vpn (uint32_t pteh)
{
return ((pteh & PTEH_VPN_MASK) >> PTEH_VPN_OFFSET);
}
/* PTEL : Page Translation Entry Low register */
#define PTEL_V (1 << 8)
#define cpu_ptel_v(ptel) (((ptel) & PTEL_V) >> 8)
#define PTEL_C (1 << 3)
#define cpu_ptel_c(ptel) (((ptel) & PTEL_C) >> 3)
#define PTEL_D (1 << 2)
#define cpu_ptel_d(ptel) (((ptel) & PTEL_D) >> 2)
#define PTEL_SH (1 << 1)
#define cpu_ptel_sh(ptel)(((ptel) & PTEL_SH) >> 1)
#define PTEL_WT (1 << 0)
#define cpu_ptel_wt(ptel) ((ptel) & PTEL_WT)
#define PTEL_SZ_HIGH_OFFSET (7)
#define PTEL_SZ_HIGH (1 << PTEL_SZ_HIGH_OFFSET)
#define PTEL_SZ_LOW_OFFSET (4)
#define PTEL_SZ_LOW (1 << PTEL_SZ_LOW_OFFSET)
static inline int cpu_ptel_sz (uint32_t ptel)
{
int sz;
sz = (ptel & PTEL_SZ_HIGH) >> PTEL_SZ_HIGH_OFFSET;
sz <<= 1;
sz |= (ptel & PTEL_SZ_LOW) >> PTEL_SZ_LOW_OFFSET;
return sz;
}
#define PTEL_PPN_BITS (19)
#define PTEL_PPN_OFFSET (10)
#define PTEL_PPN_SIZE (1 << PTEL_PPN_BITS)
#define PTEL_PPN_MASK (((PTEL_PPN_SIZE) - 1) << PTEL_PPN_OFFSET)
static inline int cpu_ptel_ppn (uint32_t ptel)
{
return ((ptel & PTEL_PPN_MASK) >> PTEL_PPN_OFFSET);
}
#define PTEL_PR_BITS (2)
#define PTEL_PR_OFFSET (5)
#define PTEL_PR_SIZE (1 << PTEL_PR_BITS)
#define PTEL_PR_MASK (((PTEL_PR_SIZE) - 1) << PTEL_PR_OFFSET)
static inline int cpu_ptel_pr (uint32_t ptel)
{
return ((ptel & PTEL_PR_MASK) >> PTEL_PR_OFFSET);
}
/* PTEA : Page Translation Entry Assistance register */
#define PTEA_SA_BITS (3)
#define PTEA_SA_SIZE (1 << PTEA_SA_BITS)
#define PTEA_SA_MASK (PTEA_SA_SIZE - 1)
#define cpu_ptea_sa(ptea) ((ptea) & PTEA_SA_MASK)
#define PTEA_TC (1 << 3)
#define cpu_ptea_tc(ptea) (((ptea) & PTEA_TC) >> 3)
static inline target_ulong cpu_read_sr(CPUSH4State *env)
{
return env->sr | (env->sr_m << SR_M) |
(env->sr_q << SR_Q) |
(env->sr_t << SR_T);
}
static inline void cpu_write_sr(CPUSH4State *env, target_ulong sr)
{
env->sr_m = (sr >> SR_M) & 1;
env->sr_q = (sr >> SR_Q) & 1;
env->sr_t = (sr >> SR_T) & 1;
env->sr = sr & ~((1u << SR_M) | (1u << SR_Q) | (1u << SR_T));
}
static inline void cpu_get_tb_cpu_state(CPUSH4State *env, target_ulong *pc,
target_ulong *cs_base, uint32_t *flags)
{
*pc = env->pc;
/* For a gUSA region, notice the end of the region. */
*cs_base = env->flags & GUSA_MASK ? env->gregs[0] : 0;
*flags = env->flags /* TB_FLAG_ENVFLAGS_MASK: bits 0-2, 4-12 */
| (env->fpscr & (FPSCR_FR | FPSCR_SZ | FPSCR_PR)) /* Bits 19-21 */
| (env->sr & ((1u << SR_MD) | (1u << SR_RB))) /* Bits 29-30 */
| (env->sr & (1u << SR_FD)) /* Bit 15 */
| (env->movcal_backup ? TB_FLAG_PENDING_MOVCA : 0); /* Bit 3 */
}
#endif /* SH4_CPU_H */
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