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/*

 * UniCore32 virtual CPU header

 *

 * Copyright (C) 2010-2012 Guan Xuetao

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation, or (at your option) any

 * later version. See the COPYING file in the top-level directory.

 */

#ifndef QEMU_UNICORE32_CPU_H

#define QEMU_UNICORE32_CPU_H

#define TARGET_LONG_BITS                32

#define TARGET_PAGE_BITS                12

#define TARGET_PHYS_ADDR_SPACE_BITS     32

#define TARGET_VIRT_ADDR_SPACE_BITS     32

#define ELF_MACHINE             EM_UNICORE32

#define CPUArchState                struct CPUUniCore32State

#include "config.h"

#include "qemu-common.h"

#include "exec/cpu-defs.h"

#include "fpu/softfloat.h"

#define NB_MMU_MODES            2

typedef struct CPUUniCore32State {

    /* Regs for current mode.  */

    uint32_t regs[32];

    /* Frequently accessed ASR bits are stored separately for efficiently.

       This contains all the other bits.  Use asr_{read,write} to access

       the whole ASR.  */

    uint32_t uncached_asr;

    uint32_t bsr;

    /* Banked registers.  */

    uint32_t banked_bsr[6];

    uint32_t banked_r29[6];

    uint32_t banked_r30[6];

    /* asr flag cache for faster execution */

    uint32_t CF; /* 0 or 1 */

    uint32_t VF; /* V is the bit 31. All other bits are undefined */

    uint32_t NF; /* N is bit 31. All other bits are undefined.  */

    uint32_t ZF; /* Z set if zero.  */

    /* System control coprocessor (cp0) */

    struct {

        uint32_t c0_cpuid;

        uint32_t c0_cachetype;

        uint32_t c1_sys; /* System control register.  */

        uint32_t c2_base; /* MMU translation table base.  */

        uint32_t c3_faultstatus; /* Fault status registers.  */

        uint32_t c4_faultaddr; /* Fault address registers.  */

        uint32_t c5_cacheop; /* Cache operation registers.  */

        uint32_t c6_tlbop; /* TLB operation registers. */

    } cp0;

    /* UniCore-F64 coprocessor state.  */

    struct {

        float64 regs[16];

        uint32_t xregs[32];

        float_status fp_status;

    } ucf64;

    CPU_COMMON

    /* Internal CPU feature flags.  */

    uint32_t features;

} CPUUniCore32State;

#define ASR_M                   (0x1f)

#define ASR_MODE_USER           (0x10)

#define ASR_MODE_INTR           (0x12)

#define ASR_MODE_PRIV           (0x13)

#define ASR_MODE_TRAP           (0x17)

#define ASR_MODE_EXTN           (0x1b)

#define ASR_MODE_SUSR           (0x1f)

#define ASR_I                   (1 << 7)

#define ASR_V                   (1 << 28)

#define ASR_C                   (1 << 29)

#define ASR_Z                   (1 << 30)

#define ASR_N                   (1 << 31)

#define ASR_NZCV                (ASR_N | ASR_Z | ASR_C | ASR_V)

#define ASR_RESERVED            (~(ASR_M | ASR_I | ASR_NZCV))

#define UC32_EXCP_PRIV          (1)

#define UC32_EXCP_ITRAP         (2)

#define UC32_EXCP_DTRAP         (3)

#define UC32_EXCP_INTR          (4)

/* Return the current ASR value.  */

target_ulong cpu_asr_read(CPUUniCore32State *env1);

/* Set the ASR.  Note that some bits of mask must be all-set or all-clear.  */

void cpu_asr_write(CPUUniCore32State *env1, target_ulong val, target_ulong mask);

/* UniCore-F64 system registers.  */

#define UC32_UCF64_FPSCR                (31)

#define UCF64_FPSCR_MASK                (0x27ffffff)

#define UCF64_FPSCR_RND_MASK            (0x7)

#define UCF64_FPSCR_RND(r)              (((r) >>  0) & UCF64_FPSCR_RND_MASK)

#define UCF64_FPSCR_TRAPEN_MASK         (0x7f)

#define UCF64_FPSCR_TRAPEN(r)           (((r) >> 10) & UCF64_FPSCR_TRAPEN_MASK)

#define UCF64_FPSCR_FLAG_MASK           (0x3ff)

#define UCF64_FPSCR_FLAG(r)             (((r) >> 17) & UCF64_FPSCR_FLAG_MASK)

#define UCF64_FPSCR_FLAG_ZERO           (1 << 17)

#define UCF64_FPSCR_FLAG_INFINITY       (1 << 18)

#define UCF64_FPSCR_FLAG_INVALID        (1 << 19)

#define UCF64_FPSCR_FLAG_UNDERFLOW      (1 << 20)

#define UCF64_FPSCR_FLAG_OVERFLOW       (1 << 21)

#define UCF64_FPSCR_FLAG_INEXACT        (1 << 22)

#define UCF64_FPSCR_FLAG_HUGEINT        (1 << 23)

#define UCF64_FPSCR_FLAG_DENORMAL       (1 << 24)

#define UCF64_FPSCR_FLAG_UNIMP          (1 << 25)

#define UCF64_FPSCR_FLAG_DIVZERO        (1 << 26)

#define UC32_HWCAP_CMOV                 4 /* 1 << 2 */

#define UC32_HWCAP_UCF64                8 /* 1 << 3 */

#define cpu_init                        uc32_cpu_init

#define cpu_exec                        uc32_cpu_exec

#define cpu_signal_handler              uc32_cpu_signal_handler

#define cpu_handle_mmu_fault            uc32_cpu_handle_mmu_fault

CPUUniCore32State *uc32_cpu_init(const char *cpu_model);

int uc32_cpu_exec(CPUUniCore32State *s);

int uc32_cpu_signal_handler(int host_signum, void *pinfo, void *puc);

int uc32_cpu_handle_mmu_fault(CPUUniCore32State *env, target_ulong address, int rw,

                              int mmu_idx);

/* MMU modes definitions */

#define MMU_MODE0_SUFFIX _kernel

#define MMU_MODE1_SUFFIX _user

#define MMU_USER_IDX 1

static inline int cpu_mmu_index(CPUUniCore32State *env)

{

    return (env->uncached_asr & ASR_M) == ASR_MODE_USER ? 1 : 0;

}

static inline void cpu_clone_regs(CPUUniCore32State *env, target_ulong newsp)

{

    if (newsp) {

        env->regs[29] = newsp;

    }

    env->regs[0] = 0;

}

static inline void cpu_set_tls(CPUUniCore32State *env, target_ulong newtls)

{

    env->regs[16] = newtls;

}

#include "exec/cpu-all.h"

#include "cpu-qom.h"

#include "exec/exec-all.h"

static inline void cpu_pc_from_tb(CPUUniCore32State *env, TranslationBlock *tb)

{

    env->regs[31] = tb->pc;

}

static inline void cpu_get_tb_cpu_state(CPUUniCore32State *env, target_ulong *pc,

                                        target_ulong *cs_base, int *flags)

{

    *pc = env->regs[31];

    *cs_base = 0;

    *flags = 0;

    if ((env->uncached_asr & ASR_M) != ASR_MODE_USER) {

        *flags |= (1 << 6);

    }

}

void uc32_translate_init(void);

void switch_mode(CPUUniCore32State *, int);

static inline bool cpu_has_work(CPUState *cpu)

{

    return cpu->interrupt_request &

        (CPU_INTERRUPT_HARD | CPU_INTERRUPT_EXITTB);

}

#endif /* QEMU_UNICORE32_CPU_H */