/*
 * Copyright (c) 2006-2021, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2019-12-04     Jiaxun Yang  Initial version
 */

#ifndef _MIPS_PTRACE_H
#define _MIPS_PTRACE_H

#include "asm.h"
#include "mips_regs.h"

#define HI_LO_SIZE  4

#define FP_REG_SIZE 8
#define NUM_FPU_REGS 16

#ifndef __ASSEMBLY__
#include <rtthread.h>

struct mips_fpu_struct {
    rt_uint64_t fpr[NUM_FPU_REGS];
    rt_uint32_t fcr31;
    rt_uint32_t pad;
};

struct pt_regs {
#ifndef ARCH_MIPS64
    /* Only O32 Need This! */
    /* Pad bytes for argument save space on the stack. */
    rt_uint32_t pad0[8];

    /* Saved main processor registers. */
    rt_uint32_t regs[32];

    /* Saved special registers. */
    rt_uint32_t cp0_status;
    rt_uint32_t hi;
    rt_uint32_t lo;
    rt_uint32_t cp0_badvaddr;
    rt_uint32_t cp0_cause;
    rt_uint32_t cp0_epc;
#else
    /* Saved main processor registers. */
    unsigned long regs[32];

    /* Saved special registers. */
    rt_uint32_t cp0_status;
    rt_uint32_t hi;
    rt_uint32_t lo;
    unsigned long cp0_badvaddr;
    rt_uint32_t cp0_cause;
    unsigned long cp0_epc;
#endif

#ifdef RT_USING_FPU
    /* FPU Registers */
    /* Unlike Linux Kernel, we save these registers unconditionally,
     * so it should be a part of pt_regs */
    struct mips_fpu_struct fpu;
#endif
} __attribute__((aligned(8)));
#endif

/* Note: For call stack o32 ABI has 0x8 shadowsoace Here  */
#ifdef ARCH_MIPS64
#define PT_R0       (0x0 * LONGSIZE)    /* 0 */
#else
#define PT_R0       (0x8 * LONGSIZE)    /* 0 */
#endif
#define PT_R1       ((PT_R0) + LONGSIZE)    /* 1 */
#define PT_R2       ((PT_R1) + LONGSIZE)    /* 2 */
#define PT_R3       ((PT_R2) + LONGSIZE)    /* 3 */
#define PT_R4       ((PT_R3) + LONGSIZE)    /* 4 */
#define PT_R5       ((PT_R4) + LONGSIZE)    /* 5 */
#define PT_R6       ((PT_R5) + LONGSIZE)    /* 6 */
#define PT_R7       ((PT_R6) + LONGSIZE)    /* 7 */
#define PT_R8       ((PT_R7) + LONGSIZE)    /* 8 */
#define PT_R9       ((PT_R8) + LONGSIZE)    /* 9 */
#define PT_R10      ((PT_R9) + LONGSIZE)    /* 10 */
#define PT_R11      ((PT_R10) + LONGSIZE)   /* 11 */
#define PT_R12      ((PT_R11) + LONGSIZE)   /* 12 */
#define PT_R13      ((PT_R12) + LONGSIZE)   /* 13 */
#define PT_R14      ((PT_R13) + LONGSIZE)   /* 14 */
#define PT_R15      ((PT_R14) + LONGSIZE)   /* 15 */
#define PT_R16      ((PT_R15) + LONGSIZE)   /* 16 */
#define PT_R17      ((PT_R16) + LONGSIZE)   /* 17 */
#define PT_R18      ((PT_R17) + LONGSIZE)   /* 18 */
#define PT_R19      ((PT_R18) + LONGSIZE)   /* 19 */
#define PT_R20      ((PT_R19) + LONGSIZE)   /* 20 */
#define PT_R21      ((PT_R20) + LONGSIZE)   /* 21 */
#define PT_R22      ((PT_R21) + LONGSIZE)   /* 22 */
#define PT_R23      ((PT_R22) + LONGSIZE)   /* 23 */
#define PT_R24      ((PT_R23) + LONGSIZE)   /* 24 */
#define PT_R25      ((PT_R24) + LONGSIZE)   /* 25 */
#define PT_R26      ((PT_R25) + LONGSIZE)   /* 26 */
#define PT_R27      ((PT_R26) + LONGSIZE)   /* 27 */
#define PT_R28      ((PT_R27) + LONGSIZE)   /* 28 */
#define PT_R29      ((PT_R28) + LONGSIZE)   /* 29 */
#define PT_R30      ((PT_R29) + LONGSIZE)   /* 30 */
#define PT_R31      ((PT_R30) + LONGSIZE)   /* 31 */

/*
 * Saved special registers
 */
#define PT_STATUS   ((PT_R31) + LONGSIZE)   /* 32 */
#define PT_HI       ((PT_STATUS) + HI_LO_SIZE)  /* 33 */
#define PT_LO       ((PT_HI) + HI_LO_SIZE)  /* 34 */
#define PT_BADVADDR ((PT_LO) + LONGSIZE)    /* 35 */
#define PT_CAUSE    ((PT_BADVADDR) + LONGSIZE)  /* 36 */
#define PT_EPC      ((PT_CAUSE) + LONGSIZE) /* 37 */

#define PT_REG_END      ((PT_EPC) + LONGSIZE) /* Align already ensured manually */

#ifdef RT_USING_FPU
#define PT_FPU_R0               (PT_REG_END)
#define PT_FPU_R2               ((PT_FPU_R0) + FP_REG_SIZE)
#define PT_FPU_R4               ((PT_FPU_R2) + FP_REG_SIZE)
#define PT_FPU_R6               ((PT_FPU_R4) + FP_REG_SIZE)
#define PT_FPU_R8               ((PT_FPU_R6) + FP_REG_SIZE)
#define PT_FPU_R10              ((PT_FPU_R8) + FP_REG_SIZE)
#define PT_FPU_R12              ((PT_FPU_R10) + FP_REG_SIZE)
#define PT_FPU_R14              ((PT_FPU_R12) + FP_REG_SIZE)
#define PT_FPU_R16              ((PT_FPU_R14) + FP_REG_SIZE)
#define PT_FPU_R18              ((PT_FPU_R16) + FP_REG_SIZE)
#define PT_FPU_R20              ((PT_FPU_R18) + FP_REG_SIZE)
#define PT_FPU_R22              ((PT_FPU_R20) + FP_REG_SIZE)
#define PT_FPU_R24              ((PT_FPU_R22) + FP_REG_SIZE)
#define PT_FPU_R26              ((PT_FPU_R24) + FP_REG_SIZE)
#define PT_FPU_R28              ((PT_FPU_R26) + FP_REG_SIZE)
#define PT_FPU_R30              ((PT_FPU_R28) + FP_REG_SIZE)
#define PT_FPU_FCSR31           ((PT_FPU_R30) + FP_REG_SIZE)
#define PT_FPU_PAD0             ((PT_FPU_FCSR31) + 4)

#define PT_FPU_END              ((PT_FPU_PAD0) + 4)
#define PT_SIZE         PT_FPU_END
#else
#define PT_SIZE         PT_REG_END
#endif

#endif