arc.h

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/* SPDX-License-Identifier: GPL-2.0-or-later */
 
/***************************************************************************
 *   Copyright (C) 2013-2015,2019-2020 Synopsys, Inc.                      *
 *   Frank Dols <frank.dols@synopsys.com>                                  *
 *   Mischa Jonker <mischa.jonker@synopsys.com>                            *
 *   Anton Kolesov <anton.kolesov@synopsys.com>                            *
 *   Evgeniy Didin <didin@synopsys.com>                                    *
 ***************************************************************************/
 
#ifndef OPENOCD_TARGET_ARC_H
#define OPENOCD_TARGET_ARC_H
 
#include <helper/time_support.h>
#include <jtag/jtag.h>
 
#include "algorithm.h"
#include "breakpoints.h"
#include "jtag/interface.h"
#include "register.h"
#include "target.h"
#include "target_request.h"
#include "target_type.h"
#include "helper/bits.h"
#include "rtt/rtt.h"
 
#include "arc_jtag.h"
#include "arc_cmd.h"
#include "arc_mem.h"
 
#define ARC_COMMON_MAGIC    0xB32EB324U  /* just a unique number */
 
#define AUX_DEBUG_REG                   0x5
#define AUX_PC_REG                      0x6
#define AUX_STATUS32_REG                0xA
 
 
#define SET_CORE_FORCE_HALT             BIT(1)
#define SET_CORE_HALT_BIT               BIT(0)      /* STATUS32[0] = H field */
#define SET_CORE_ENABLE_INTERRUPTS      BIT(31)
/* STATUS32[5] or AE bit indicates if the processor is in exception state */
#define SET_CORE_AE_BIT                 BIT(5)
/* Single instruction step bit in Debug register */
#define SET_CORE_SINGLE_INSTR_STEP      BIT(11)
 
#define AUX_STATUS32_REG_HALT_BIT       BIT(0)
#define AUX_STATUS32_REG_IE_BIT         BIT(31)    /* STATUS32[31] = IE field */
 
/* ARC register numbers */
enum {
    ARC_R0,
    ARC_R1,
    ARC_R2,
    ARC_R3,
    ARC_R4,
    ARC_R5,
    ARC_R6,
    ARC_R7,
    ARC_R8,
    ARC_R9,
    ARC_R10,
    ARC_R11,
    ARC_R12,
    ARC_R13,
    ARC_R14,
    ARC_R15,
    ARC_R16,
    ARC_R17,
    ARC_R18,
    ARC_R19,
    ARC_R20,
    ARC_R21,
    ARC_R22,
    ARC_R23,
    ARC_R24,
    ARC_R25,
    ARC_GP      = 26,
    ARC_FP      = 27,
    ARC_SP      = 28,
    ARC_ILINK   = 29,
    ARC_R30,
    ARC_BLINK   = 31,
    ARC_LP_COUNT    = 60,
 
    /* Reserved registers */
    ARC_R61     = 61,
    ARC_R62     = 62,
 
    ARC_PCL     = 63,
    ARC_PC      = 64,
    ARC_LP_START    = 65,
    ARC_LP_END  = 66,
    ARC_STATUS32    = 67,
};
 
#define CORE_REG_MAX_NUMBER     (63)
 
/* Limit reg_type/reg_type_field  name to 20 symbols */
#define REG_TYPE_MAX_NAME_LENGTH    20
 
/* ARC 32bits opcodes */
#define ARC_SDBBP_32 0x256F003FU  /* BRK */
 
/* ARC 16bits opcodes */
#define ARC_SDBBP_16 0x7FFF      /* BRK_S */
 
/* Cache registers */
#define AUX_IC_IVIC_REG         0X10
#define IC_IVIC_INVALIDATE      0XFFFFFFFF
 
#define AUX_DC_IVDC_REG         0X47
#define DC_IVDC_INVALIDATE      BIT(0)
#define AUX_DC_CTRL_REG         0X48
#define DC_CTRL_IM          BIT(6)
 
/* L2 cache registers */
#define SLC_AUX_CACHE_CTRL      0x903
#define L2_CTRL_IM          BIT(6)
#define L2_CTRL_BS          BIT(8)      /* Busy flag */
#define SLC_AUX_CACHE_FLUSH     0x904
#define L2_FLUSH_FL         BIT(0)
#define SLC_AUX_CACHE_INV       0x905
#define L2_INV_IV           BIT(0)
 
 /* Action Point */
#define AP_AC_AT_INST_ADDR      0x0
#define AP_AC_AT_MEMORY_ADDR    0x2
#define AP_AC_AT_AUXREG_ADDR    0x4
 
#define AP_AC_TT_DISABLE        0x00
#define AP_AC_TT_WRITE          0x10
#define AP_AC_TT_READ           0x20
#define AP_AC_TT_READWRITE      0x30
 
struct arc_reg_bitfield {
    struct reg_data_type_bitfield bitfield;
    char name[REG_TYPE_MAX_NAME_LENGTH];
};
/* Register data type */
struct arc_reg_data_type {
    struct list_head list;
    struct reg_data_type data_type;
    struct reg_data_type_flags data_type_flags;
    struct reg_data_type_struct data_type_struct;
    char data_type_id[REG_TYPE_MAX_NAME_LENGTH];
    struct arc_reg_bitfield *bitfields;
    union {
        struct reg_data_type_struct_field *reg_type_struct_field;
        struct reg_data_type_flags_field *reg_type_flags_field;
    };
};
 
/* Standard GDB register types */
static const struct reg_data_type standard_gdb_types[] = {
    { .type = REG_TYPE_INT,         .id = "int" },
    { .type = REG_TYPE_INT8,        .id = "int8" },
    { .type = REG_TYPE_INT16,       .id = "int16" },
    { .type = REG_TYPE_INT32,       .id = "int32" },
    { .type = REG_TYPE_INT64,       .id = "int64" },
    { .type = REG_TYPE_INT128,      .id = "int128" },
    { .type = REG_TYPE_UINT8,       .id = "uint8" },
    { .type = REG_TYPE_UINT16,      .id = "uint16" },
    { .type = REG_TYPE_UINT32,      .id = "uint32" },
    { .type = REG_TYPE_UINT64,      .id = "uint64" },
    { .type = REG_TYPE_UINT128,     .id = "uint128" },
    { .type = REG_TYPE_CODE_PTR,    .id = "code_ptr" },
    { .type = REG_TYPE_DATA_PTR,    .id = "data_ptr" },
    { .type = REG_TYPE_FLOAT,       .id = "float" },
    { .type = REG_TYPE_IEEE_SINGLE, .id = "ieee_single" },
    { .type = REG_TYPE_IEEE_DOUBLE, .id = "ieee_double" },
};
 
enum arc_actionpointype {
    ARC_AP_BREAKPOINT,
    ARC_AP_WATCHPOINT,
};
 
/* Actionpoint related fields  */
struct arc_actionpoint {
    int used;
    uint32_t bp_value;
    uint32_t reg_address;
    enum arc_actionpointype type;
};
 
struct arc_common {
    unsigned int common_magic;
 
    struct arc_jtag jtag_info;
 
    struct reg_cache *core_and_aux_cache;
    struct reg_cache *bcr_cache;
 
    /* Cache control */
    bool has_dcache;
    bool has_icache;
    bool has_l2cache;
    /* If true, then D$ has been already flushed since core has been
     * halted. */
    bool dcache_flushed;
    /* If true, then L2 has been already flushed since core has been
     * halted. */
    bool l2cache_flushed;
    /* If true, then caches have been already flushed since core has been
     * halted. */
    bool icache_invalidated;
    bool dcache_invalidated;
    bool l2cache_invalidated;
 
    /* Indicate if cache was built (for deinit function) */
    bool core_aux_cache_built;
    bool bcr_cache_built;
    /* Closely Coupled memory(CCM) regions for performance-critical
     * code (optional). */
    uint32_t iccm0_start;
    uint32_t iccm0_end;
    uint32_t iccm1_start;
    uint32_t iccm1_end;
    uint32_t dccm_start;
    uint32_t dccm_end;
 
    int irq_state;
 
    /* Register descriptions */
    struct list_head reg_data_types;
    struct list_head core_reg_descriptions;
    struct list_head aux_reg_descriptions;
    struct list_head bcr_reg_descriptions;
    unsigned long num_regs;
    unsigned long num_core_regs;
    unsigned long num_aux_regs;
    unsigned long num_bcr_regs;
    unsigned long last_general_reg;
 
    /* PC register location in register cache. */
    unsigned long pc_index_in_cache;
    /* DEBUG register location in register cache. */
    unsigned long debug_index_in_cache;
 
    /* Actionpoints */
    unsigned int actionpoints_num;
    unsigned int actionpoints_num_avail;
    struct arc_actionpoint *actionpoints_list;
};
 
/* Borrowed from nds32.h */
#define CHECK_RETVAL(action)            \
    do {                    \
        int __retval = (action);    \
        if (__retval != ERROR_OK) { \
            LOG_DEBUG("error while calling \"%s\"", \
                # action);     \
            return __retval;    \
        }               \
    } while (0)
 
static inline struct arc_common *target_to_arc(struct target *target)
{
    return target->arch_info;
}
 
/* ----- Inlined functions ------------------------------------------------- */
 
static inline void arc_h_u32_to_me(uint8_t *buf, int val)
{
    buf[1] = (uint8_t) (val >> 24);
    buf[0] = (uint8_t) (val >> 16);
    buf[3] = (uint8_t) (val >> 8);
    buf[2] = (uint8_t) (val >> 0);
}
 
static inline uint32_t arc_me_to_h_u32(const uint8_t *buf)
{
    return (uint32_t)(buf[2] | buf[3] << 8 | buf[0] << 16 | buf[1] << 24);
}
 
 
/* ARC Register description */
struct arc_reg_desc {
 
    struct target *target;
 
    /* Register name */
    char *name;
 
    /* Actual place of storing reg_value */
    uint8_t reg_value[4];
 
    /* Actual place of storing register feature */
    struct reg_feature feature;
 
    /* GDB XML feature */
    char *gdb_xml_feature;
 
    /* Is this a register in g/G-packet? */
    bool is_general;
 
    /* Architectural number: core reg num or AUX reg num */
    uint32_t arch_num;
 
    /* Core or AUX register? */
    bool is_core;
 
    /* Build configuration register? */
    bool is_bcr;
 
    /* Data type */
    struct reg_data_type *data_type;
 
    struct list_head list;
};
 
/* Error codes */
#define ERROR_ARC_REGISTER_NOT_FOUND       (-700)
#define ERROR_ARC_REGISTER_FIELD_NOT_FOUND (-701)
#define ERROR_ARC_REGISTER_IS_NOT_STRUCT   (-702)
#define ERROR_ARC_FIELD_IS_NOT_BITFIELD    (-703)
#define ERROR_ARC_REGTYPE_NOT_FOUND        (-704)
 
void free_reg_desc(struct arc_reg_desc *r);
 
 
void arc_reg_data_type_add(struct target *target,
        struct arc_reg_data_type *data_type);
 
int arc_reg_add(struct target *target, struct arc_reg_desc *arc_reg,
        const char * const type_name, const size_t type_name_len);
 
struct reg *arc_reg_get_by_name(struct reg_cache *first,
                    const char *name, bool search_all);
 
int arc_reg_get_field(struct target *target, const char *reg_name,
        const char *field_name, uint32_t *value_ptr);
 
int arc_cache_flush(struct target *target);
int arc_cache_invalidate(struct target *target);
 
int arc_add_auxreg_actionpoint(struct target *target,
    uint32_t auxreg_addr, uint32_t transaction);
int arc_remove_auxreg_actionpoint(struct target *target, uint32_t auxreg_addr);
int arc_set_actionpoints_num(struct target *target, uint32_t ap_num);
 
#endif /* OPENOCD_TARGET_ARC_H */