target.h

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/* SPDX-License-Identifier: GPL-2.0-or-later */
 
/***************************************************************************
 *   Copyright (C) 2005 by Dominic Rath                                    *
 *   Dominic.Rath@gmx.de                                                   *
 *                                                                         *
 *   Copyright (C) 2007-2010 Øyvind Harboe                                 *
 *   oyvind.harboe@zylin.com                                               *
 *                                                                         *
 *   Copyright (C) 2008 by Spencer Oliver                                  *
 *   spen@spen-soft.co.uk                                                  *
 *                                                                         *
 *   Copyright (C) 2011 by Broadcom Corporation                            *
 *   Evan Hunter - ehunter@broadcom.com                                    *
 *                                                                         *
 *   Copyright (C) ST-Ericsson SA 2011                                     *
 *   michel.jaouen@stericsson.com : smp minimum support                    *
 ***************************************************************************/
 
#ifndef OPENOCD_TARGET_TARGET_H
#define OPENOCD_TARGET_TARGET_H
 
#include <helper/list.h>
#include "helper/replacements.h"
#include "helper/system.h"
#include <jim.h>
 
struct reg;
struct trace;
struct command_context;
struct command_invocation;
struct breakpoint;
struct watchpoint;
struct mem_param;
struct reg_param;
struct target_list;
struct gdb_fileio_info;
 
/*
 * TARGET_UNKNOWN = 0: we don't know anything about the target yet
 * TARGET_RUNNING = 1: the target is executing or ready to execute user code
 * TARGET_HALTED  = 2: the target is not executing code, and ready to talk to the
 * debugger. on an xscale it means that the debug handler is executing
 * TARGET_RESET   = 3: the target is being held in reset (only a temporary state,
 * not sure how this is used with all the recent changes)
 * TARGET_DEBUG_RUNNING = 4: the target is running, but it is executing code on
 * behalf of the debugger (e.g. algorithm for flashing)
 *
 * also see: target_state_name();
 */
 
enum target_state {
    TARGET_UNKNOWN = 0,
    TARGET_RUNNING = 1,
    TARGET_HALTED = 2,
    TARGET_RESET = 3,
    TARGET_DEBUG_RUNNING = 4,
};
 
enum nvp_assert {
    NVP_DEASSERT,
    NVP_ASSERT,
};
 
enum target_reset_mode {
    RESET_UNKNOWN = 0,
    RESET_RUN = 1,      /* reset and let target run */
    RESET_HALT = 2,     /* reset and halt target out of reset */
    RESET_INIT = 3,     /* reset and halt target out of reset, then run init script */
};
 
enum target_debug_reason {
    DBG_REASON_DBGRQ = 0,
    DBG_REASON_BREAKPOINT = 1,
    DBG_REASON_WATCHPOINT = 2,
    DBG_REASON_WPTANDBKPT = 3,
    DBG_REASON_SINGLESTEP = 4,
    DBG_REASON_NOTHALTED = 5,
    DBG_REASON_EXIT = 6,
    DBG_REASON_EXC_CATCH = 7,
    DBG_REASON_UNDEFINED = 8,
};
 
enum target_endianness {
    TARGET_ENDIAN_UNKNOWN = 0,
    TARGET_BIG_ENDIAN = 1, TARGET_LITTLE_ENDIAN = 2
};
 
struct working_area {
    target_addr_t address;
    uint32_t size;
    bool free;
    uint8_t *backup;
    struct working_area **user;
    struct working_area *next;
};
 
struct gdb_service {
    struct target *target;
    /*  field for smp display  */
    /*  element 0 coreid currently displayed ( 1 till n) */
    /*  element 1 coreid to be displayed at next resume 1 till n 0 means resume
     *  all cores core displayed  */
    int32_t core[2];
};
 
/* target back off timer */
struct backoff_timer {
    int times;
    int count;
};
 
/* split target registers into multiple class */
enum target_register_class {
    REG_CLASS_ALL,
    REG_CLASS_GENERAL,
};
 
/* target_type.h contains the full definition of struct target_type */
struct target {
    struct target_type *type;           /* target type definition (name, access functions) */
    char *cmd_name;             /* tcl Name of target */
    int target_number;                  /* DO NOT USE!  field to be removed in 2010 */
    struct jtag_tap *tap;               /* where on the jtag chain is this */
    int32_t coreid;                     /* which device on the TAP? */
 
    bool defer_examine;
 
    bool examined;
 
    bool running_alg;
 
    struct target_event_action *event_action;
 
    bool reset_halt;                        /* attempt resetting the CPU into the halted mode? */
    target_addr_t working_area;             /* working area (initialised RAM). Evaluated
                                         * upon first allocation from virtual/physical address. */
    bool working_area_virt_spec;        /* virtual address specified? */
    target_addr_t working_area_virt;            /* virtual address */
    bool working_area_phys_spec;        /* physical address specified? */
    target_addr_t working_area_phys;            /* physical address */
    uint32_t working_area_size;         /* size in bytes */
    uint32_t backup_working_area;       /* whether the content of the working area has to be preserved */
    struct working_area *working_areas;/* list of allocated working areas */
    enum target_debug_reason debug_reason;/* reason why the target entered debug state */
    enum target_endianness endianness;  /* target endianness */
    /* also see: target_state_name() */
    enum target_state state;            /* the current backend-state (running, halted, ...) */
    struct reg_cache *reg_cache;        /* the first register cache of the target (core regs) */
    struct breakpoint *breakpoints;     /* list of breakpoints */
    struct watchpoint *watchpoints;     /* list of watchpoints */
    struct trace *trace_info;           /* generic trace information */
    struct debug_msg_receiver *dbgmsg;  /* list of debug message receivers */
    uint32_t dbg_msg_enabled;           /* debug message status */
    void *arch_info;                    /* architecture specific information */
    void *private_config;               /* pointer to target specific config data (for jim_configure hook) */
    struct target *next;                /* next target in list */
 
    bool verbose_halt_msg;              /* display async info in telnet session. Do not display
                                         * lots of halted/resumed info when stepping in debugger. */
    bool halt_issued;                   /* did we transition to halted state? */
    int64_t halt_issued_time;           /* Note time when halt was issued */
 
                                        /* ARM v7/v8 targets with ADIv5 interface */
    bool dbgbase_set;                   /* By default the debug base is not set */
    uint32_t dbgbase;                   /* Really a Cortex-A specific option, but there is no
                                         * system in place to support target specific options
                                         * currently. */
    bool has_dap;                       /* set to true if target has ADIv5 support */
    bool dap_configured;                /* set to true if ADIv5 DAP is configured */
    bool tap_configured;                /* set to true if JTAG tap has been configured
                                         * through -chain-position */
 
    struct rtos *rtos;                  /* Instance of Real Time Operating System support */
    bool rtos_auto_detect;              /* A flag that indicates that the RTOS has been specified as "auto"
                                         * and must be detected when symbols are offered */
    struct backoff_timer backoff;
    int smp;                            /* Unique non-zero number for each SMP group */
    struct list_head *smp_targets;      /* list all targets in this smp group/cluster
                                         * The head of the list is shared between the
                                         * cluster, thus here there is a pointer */
    /* the gdb service is there in case of smp, we have only one gdb server
     * for all smp target
     * the target attached to the gdb is changing dynamically by changing
     * gdb_service->target pointer */
    struct gdb_service *gdb_service;
 
    /* file-I/O information for host to do syscall */
    struct gdb_fileio_info *fileio_info;
 
    char *gdb_port_override;            /* target-specific override for gdb_port */
 
    int gdb_max_connections;            /* max number of simultaneous gdb connections */
 
    /* The semihosting information, extracted from the target. */
    struct semihosting *semihosting;
};
 
struct target_list {
    struct list_head lh;
    struct target *target;
};
 
struct gdb_fileio_info {
    char *identifier;
    uint64_t param_1;
    uint64_t param_2;
    uint64_t param_3;
    uint64_t param_4;
};
 
static inline const char *target_endianness(struct target *target)
{
    return (target->endianness == TARGET_ENDIAN_UNKNOWN) ? "unknown" :
            (target->endianness == TARGET_BIG_ENDIAN) ? "big endian" : "little endian";
}
 
static inline const char *target_name(struct target *target)
{
    return target->cmd_name;
}
 
const char *debug_reason_name(struct target *t);
 
enum target_event {
 
    /* allow GDB to do stuff before others handle the halted event,
     * this is in lieu of defining ordering of invocation of events,
     * which would be more complicated
     *
     * Telling GDB to halt does not mean that the target stopped running,
     * simply that we're dropping out of GDB's waiting for step or continue.
     *
     * This can be useful when e.g. detecting power dropout.
     */
    TARGET_EVENT_GDB_HALT,
    TARGET_EVENT_HALTED,        /* target entered debug state from normal execution or reset */
    TARGET_EVENT_RESUMED,       /* target resumed to normal execution */
    TARGET_EVENT_RESUME_START,
    TARGET_EVENT_RESUME_END,
    TARGET_EVENT_STEP_START,
    TARGET_EVENT_STEP_END,
 
    TARGET_EVENT_GDB_START, /* debugger started execution (step/run) */
    TARGET_EVENT_GDB_END, /* debugger stopped execution (step/run) */
 
    TARGET_EVENT_RESET_START,
    TARGET_EVENT_RESET_ASSERT_PRE,
    TARGET_EVENT_RESET_ASSERT,  /* C code uses this instead of SRST */
    TARGET_EVENT_RESET_ASSERT_POST,
    TARGET_EVENT_RESET_DEASSERT_PRE,
    TARGET_EVENT_RESET_DEASSERT_POST,
    TARGET_EVENT_RESET_INIT,
    TARGET_EVENT_RESET_END,
 
    TARGET_EVENT_DEBUG_HALTED,  /* target entered debug state, but was executing on behalf of the debugger */
    TARGET_EVENT_DEBUG_RESUMED, /* target resumed to execute on behalf of the debugger */
 
    TARGET_EVENT_EXAMINE_START,
    TARGET_EVENT_EXAMINE_FAIL,
    TARGET_EVENT_EXAMINE_END,
 
    TARGET_EVENT_GDB_ATTACH,
    TARGET_EVENT_GDB_DETACH,
 
    TARGET_EVENT_GDB_FLASH_ERASE_START,
    TARGET_EVENT_GDB_FLASH_ERASE_END,
    TARGET_EVENT_GDB_FLASH_WRITE_START,
    TARGET_EVENT_GDB_FLASH_WRITE_END,
 
    TARGET_EVENT_TRACE_CONFIG,
 
    TARGET_EVENT_SEMIHOSTING_USER_CMD_0X100 = 0x100, /* semihosting allows user cmds from 0x100 to 0x1ff */
    TARGET_EVENT_SEMIHOSTING_USER_CMD_0X101 = 0x101,
    TARGET_EVENT_SEMIHOSTING_USER_CMD_0X102 = 0x102,
    TARGET_EVENT_SEMIHOSTING_USER_CMD_0X103 = 0x103,
    TARGET_EVENT_SEMIHOSTING_USER_CMD_0X104 = 0x104,
    TARGET_EVENT_SEMIHOSTING_USER_CMD_0X105 = 0x105,
    TARGET_EVENT_SEMIHOSTING_USER_CMD_0X106 = 0x106,
    TARGET_EVENT_SEMIHOSTING_USER_CMD_0X107 = 0x107,
};
 
struct target_event_action {
    enum target_event event;
    Jim_Interp *interp;
    Jim_Obj *body;
    struct target_event_action *next;
};
 
bool target_has_event_action(struct target *target, enum target_event event);
 
struct target_event_callback {
    int (*callback)(struct target *target, enum target_event event, void *priv);
    void *priv;
    struct target_event_callback *next;
};
 
struct target_reset_callback {
    struct list_head list;
    void *priv;
    int (*callback)(struct target *target, enum target_reset_mode reset_mode, void *priv);
};
 
struct target_trace_callback {
    struct list_head list;
    void *priv;
    int (*callback)(struct target *target, size_t len, uint8_t *data, void *priv);
};
 
enum target_timer_type {
    TARGET_TIMER_TYPE_ONESHOT,
    TARGET_TIMER_TYPE_PERIODIC
};
 
struct target_timer_callback {
    int (*callback)(void *priv);
    unsigned int time_ms;
    enum target_timer_type type;
    bool removed;
    int64_t when;   /* output of timeval_ms() */
    void *priv;
    struct target_timer_callback *next;
};
 
struct target_memory_check_block {
    target_addr_t address;
    uint32_t size;
    uint32_t result;
};
 
int target_register_commands(struct command_context *cmd_ctx);
int target_examine(void);
 
int target_register_event_callback(
        int (*callback)(struct target *target,
        enum target_event event, void *priv),
        void *priv);
int target_unregister_event_callback(
        int (*callback)(struct target *target,
        enum target_event event, void *priv),
        void *priv);
 
int target_register_reset_callback(
        int (*callback)(struct target *target,
        enum target_reset_mode reset_mode, void *priv),
        void *priv);
int target_unregister_reset_callback(
        int (*callback)(struct target *target,
        enum target_reset_mode reset_mode, void *priv),
        void *priv);
 
int target_register_trace_callback(
        int (*callback)(struct target *target,
        size_t len, uint8_t *data, void *priv),
        void *priv);
int target_unregister_trace_callback(
        int (*callback)(struct target *target,
        size_t len, uint8_t *data, void *priv),
        void *priv);
 
/* Poll the status of the target, detect any error conditions and report them.
 *
 * Also note that this fn will clear such error conditions, so a subsequent
 * invocation will then succeed.
 *
 * These error conditions can be "sticky" error conditions. E.g. writing
 * to memory could be implemented as an open loop and if memory writes
 * fails, then a note is made of it, the error is sticky, but the memory
 * write loop still runs to completion. This improves performance in the
 * normal case as there is no need to verify that every single write succeed,
 * yet it is possible to detect error conditions.
 */
int target_poll(struct target *target);
int target_resume(struct target *target, int current, target_addr_t address,
        int handle_breakpoints, int debug_execution);
int target_halt(struct target *target);
int target_call_event_callbacks(struct target *target, enum target_event event);
int target_call_reset_callbacks(struct target *target, enum target_reset_mode reset_mode);
int target_call_trace_callbacks(struct target *target, size_t len, uint8_t *data);
 
int target_register_timer_callback(int (*callback)(void *priv),
        unsigned int time_ms, enum target_timer_type type, void *priv);
int target_unregister_timer_callback(int (*callback)(void *priv), void *priv);
int target_call_timer_callbacks(void);
int target_call_timer_callbacks_now(void);
int64_t target_timer_next_event(void);
 
struct target *get_target_by_num(int num);
struct target *get_current_target(struct command_context *cmd_ctx);
struct target *get_current_target_or_null(struct command_context *cmd_ctx);
struct target *get_target(const char *id);
 
const char *target_type_name(struct target *target);
 
int target_examine_one(struct target *target);
 
static inline bool target_was_examined(struct target *target)
{
    return target->examined;
}
 
static inline void target_set_examined(struct target *target)
{
    target->examined = true;
}
 
int target_add_breakpoint(struct target *target,
        struct breakpoint *breakpoint);
int target_add_context_breakpoint(struct target *target,
        struct breakpoint *breakpoint);
int target_add_hybrid_breakpoint(struct target *target,
        struct breakpoint *breakpoint);
int target_remove_breakpoint(struct target *target,
        struct breakpoint *breakpoint);
int target_add_watchpoint(struct target *target,
        struct watchpoint *watchpoint);
int target_remove_watchpoint(struct target *target,
        struct watchpoint *watchpoint);
 
int target_hit_watchpoint(struct target *target,
        struct watchpoint **watchpoint);
 
const char *target_get_gdb_arch(struct target *target);
 
int target_get_gdb_reg_list(struct target *target,
        struct reg **reg_list[], int *reg_list_size,
        enum target_register_class reg_class);
 
int target_get_gdb_reg_list_noread(struct target *target,
        struct reg **reg_list[], int *reg_list_size,
        enum target_register_class reg_class);
 
bool target_supports_gdb_connection(struct target *target);
 
int target_step(struct target *target,
        int current, target_addr_t address, int handle_breakpoints);
int target_run_algorithm(struct target *target,
        int num_mem_params, struct mem_param *mem_params,
        int num_reg_params, struct reg_param *reg_param,
        target_addr_t entry_point, target_addr_t exit_point,
        int timeout_ms, void *arch_info);
 
int target_start_algorithm(struct target *target,
        int num_mem_params, struct mem_param *mem_params,
        int num_reg_params, struct reg_param *reg_params,
        target_addr_t entry_point, target_addr_t exit_point,
        void *arch_info);
 
int target_wait_algorithm(struct target *target,
        int num_mem_params, struct mem_param *mem_params,
        int num_reg_params, struct reg_param *reg_params,
        target_addr_t exit_point, int timeout_ms,
        void *arch_info);
 
int target_run_flash_async_algorithm(struct target *target,
        const uint8_t *buffer, uint32_t count, int block_size,
        int num_mem_params, struct mem_param *mem_params,
        int num_reg_params, struct reg_param *reg_params,
        uint32_t buffer_start, uint32_t buffer_size,
        uint32_t entry_point, uint32_t exit_point,
        void *arch_info);
 
int target_run_read_async_algorithm(struct target *target,
        uint8_t *buffer, uint32_t count, int block_size,
        int num_mem_params, struct mem_param *mem_params,
        int num_reg_params, struct reg_param *reg_params,
        uint32_t buffer_start, uint32_t buffer_size,
        uint32_t entry_point, uint32_t exit_point,
        void *arch_info);
 
int target_read_memory(struct target *target,
        target_addr_t address, uint32_t size, uint32_t count, uint8_t *buffer);
int target_read_phys_memory(struct target *target,
        target_addr_t address, uint32_t size, uint32_t count, uint8_t *buffer);
int target_write_memory(struct target *target,
        target_addr_t address, uint32_t size, uint32_t count, const uint8_t *buffer);
int target_write_phys_memory(struct target *target,
        target_addr_t address, uint32_t size, uint32_t count, const uint8_t *buffer);
 
/*
 * Write to target memory using the virtual address.
 *
 * Note that this fn is used to implement software breakpoints. Targets
 * can implement support for software breakpoints to memory marked as read
 * only by making this fn write to ram even if it is read only(MMU or
 * MPUs).
 *
 * It is sufficient to implement for writing a single word(16 or 32 in
 * ARM32/16 bit case) to write the breakpoint to ram.
 *
 * The target should also take care of "other things" to make sure that
 * software breakpoints can be written using this function. E.g.
 * when there is a separate instruction and data cache, this fn must
 * make sure that the instruction cache is synced up to the potential
 * code change that can happen as a result of the memory write(typically
 * by invalidating the cache).
 *
 * The high level wrapper fn in target.c will break down this memory write
 * request to multiple write requests to the target driver to e.g. guarantee
 * that writing 4 bytes to an aligned address happens with a single 32 bit
 * write operation, thus making this fn suitable to e.g. write to special
 * peripheral registers which do not support byte operations.
 */
int target_write_buffer(struct target *target,
        target_addr_t address, uint32_t size, const uint8_t *buffer);
int target_read_buffer(struct target *target,
        target_addr_t address, uint32_t size, uint8_t *buffer);
int target_checksum_memory(struct target *target,
        target_addr_t address, uint32_t size, uint32_t *crc);
int target_blank_check_memory(struct target *target,
        struct target_memory_check_block *blocks, int num_blocks,
        uint8_t erased_value);
int target_wait_state(struct target *target, enum target_state state, int ms);
 
int target_get_gdb_fileio_info(struct target *target, struct gdb_fileio_info *fileio_info);
 
int target_gdb_fileio_end(struct target *target, int retcode, int fileio_errno, bool ctrl_c);
 
target_addr_t target_address_max(struct target *target);
 
unsigned target_address_bits(struct target *target);
 
unsigned int target_data_bits(struct target *target);
 
const char *target_state_name(struct target *target);
 
const char *target_event_name(enum target_event event);
 
const char *target_reset_mode_name(enum target_reset_mode reset_mode);
 
/* DANGER!!!!!
 *
 * if "area" passed in to target_alloc_working_area() points to a memory
 * location that goes out of scope (e.g. a pointer on the stack), then
 * the caller of target_alloc_working_area() is responsible for invoking
 * target_free_working_area() before "area" goes out of scope.
 *
 * target_free_all_working_areas() will NULL out the "area" pointer
 * upon resuming or resetting the CPU.
 *
 */
int target_alloc_working_area(struct target *target,
        uint32_t size, struct working_area **area);
/* Same as target_alloc_working_area, except that no error is logged
 * when ERROR_TARGET_RESOURCE_NOT_AVAILABLE is returned.
 *
 * This allows the calling code to *try* to allocate target memory
 * and have a fallback to another behaviour(slower?).
 */
int target_alloc_working_area_try(struct target *target,
        uint32_t size, struct working_area **area);
int target_free_working_area(struct target *target, struct working_area *area);
void target_free_all_working_areas(struct target *target);
uint32_t target_get_working_area_avail(struct target *target);
 
void target_quit(void);
 
extern struct target *all_targets;
 
uint64_t target_buffer_get_u64(struct target *target, const uint8_t *buffer);
uint32_t target_buffer_get_u32(struct target *target, const uint8_t *buffer);
uint32_t target_buffer_get_u24(struct target *target, const uint8_t *buffer);
uint16_t target_buffer_get_u16(struct target *target, const uint8_t *buffer);
void target_buffer_set_u64(struct target *target, uint8_t *buffer, uint64_t value);
void target_buffer_set_u32(struct target *target, uint8_t *buffer, uint32_t value);
void target_buffer_set_u24(struct target *target, uint8_t *buffer, uint32_t value);
void target_buffer_set_u16(struct target *target, uint8_t *buffer, uint16_t value);
 
void target_buffer_get_u64_array(struct target *target, const uint8_t *buffer, uint32_t count, uint64_t *dstbuf);
void target_buffer_get_u32_array(struct target *target, const uint8_t *buffer, uint32_t count, uint32_t *dstbuf);
void target_buffer_get_u16_array(struct target *target, const uint8_t *buffer, uint32_t count, uint16_t *dstbuf);
void target_buffer_set_u64_array(struct target *target, uint8_t *buffer, uint32_t count, const uint64_t *srcbuf);
void target_buffer_set_u32_array(struct target *target, uint8_t *buffer, uint32_t count, const uint32_t *srcbuf);
void target_buffer_set_u16_array(struct target *target, uint8_t *buffer, uint32_t count, const uint16_t *srcbuf);
 
int target_read_u64(struct target *target, target_addr_t address, uint64_t *value);
int target_read_u32(struct target *target, target_addr_t address, uint32_t *value);
int target_read_u16(struct target *target, target_addr_t address, uint16_t *value);
int target_read_u8(struct target *target, target_addr_t address, uint8_t *value);
int target_write_u64(struct target *target, target_addr_t address, uint64_t value);
int target_write_u32(struct target *target, target_addr_t address, uint32_t value);
int target_write_u16(struct target *target, target_addr_t address, uint16_t value);
int target_write_u8(struct target *target, target_addr_t address, uint8_t value);
 
int target_write_phys_u64(struct target *target, target_addr_t address, uint64_t value);
int target_write_phys_u32(struct target *target, target_addr_t address, uint32_t value);
int target_write_phys_u16(struct target *target, target_addr_t address, uint16_t value);
int target_write_phys_u8(struct target *target, target_addr_t address, uint8_t value);
 
/* Issues USER() statements with target state information */
int target_arch_state(struct target *target);
 
void target_handle_event(struct target *t, enum target_event e);
 
void target_handle_md_output(struct command_invocation *cmd,
    struct target *target, target_addr_t address, unsigned size,
    unsigned count, const uint8_t *buffer);
 
int target_profiling_default(struct target *target, uint32_t *samples, uint32_t
        max_num_samples, uint32_t *num_samples, uint32_t seconds);
 
#define ERROR_TARGET_INVALID    (-300)
#define ERROR_TARGET_INIT_FAILED (-301)
#define ERROR_TARGET_TIMEOUT    (-302)
#define ERROR_TARGET_NOT_HALTED (-304)
#define ERROR_TARGET_FAILURE    (-305)
#define ERROR_TARGET_UNALIGNED_ACCESS   (-306)
#define ERROR_TARGET_DATA_ABORT (-307)
#define ERROR_TARGET_RESOURCE_NOT_AVAILABLE (-308)
#define ERROR_TARGET_TRANSLATION_FAULT  (-309)
#define ERROR_TARGET_NOT_RUNNING (-310)
#define ERROR_TARGET_NOT_EXAMINED (-311)
#define ERROR_TARGET_DUPLICATE_BREAKPOINT (-312)
#define ERROR_TARGET_ALGO_EXIT  (-313)
 
extern bool get_target_reset_nag(void);
 
#define TARGET_DEFAULT_POLLING_INTERVAL     100
 
#endif /* OPENOCD_TARGET_TARGET_H */