* Copyright (C) 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
- * Copyright (C) 2007,2008,2009 Øyvind Harboe *
+ * Copyright (C) 2007-2010 Øyvind Harboe *
* oyvind.harboe@zylin.com *
* *
* Copyright (C) 2008 by Spencer Oliver *
#ifndef TARGET_TYPE_H
#define TARGET_TYPE_H
-#include "types.h"
+#include <helper/types.h>
+#include <jim-nvp.h>
struct target;
+/**
+ * This holds methods shared between all instances of a given target
+ * type. For example, all Cortex-M3 targets on a scan chain share
+ * the same method table.
+ */
struct target_type
{
/**
- * Name of the target. Do @b not access this field directly, use
- * target_get_name() instead.
+ * Name of this type of target. Do @b not access this
+ * field directly, use target_type_name() instead.
*/
- char *name;
-
- /**
- * Indicates whether this target has been examined.
- *
- * Do @b not access this field directly, use target_was_examined()
- * target_set_examined(), and target_reset_examined().
- */
- int examined;
+ const char *name;
/* poll current target status */
int (*poll)(struct target *target);
*
*/
int (*assert_reset)(struct target *target);
+ /**
+ * The implementation is responsible for polling the
+ * target such that target->state reflects the
+ * state correctly.
+ *
+ * Otherwise the following would fail, as there will not
+ * be any "poll" invoked inbetween the "reset run" and
+ * "halt".
+ *
+ * reset run; halt
+ */
int (*deassert_reset)(struct target *target);
int (*soft_reset_halt_imp)(struct target *target);
int (*soft_reset_halt)(struct target *target);
* Target must be halted while this is invoked as this
* will actually set up breakpoints on target.
*
- * The breakpoint hardware will be set up upon adding the first breakpoint.
+ * The breakpoint hardware will be set up upon adding the
+ * first breakpoint.
*
* Upon GDB connection all breakpoints/watchpoints are cleared.
*/
int (*add_breakpoint)(struct target *target, struct breakpoint *breakpoint);
- /* remove breakpoint. hw will only be updated if the target is currently halted.
+ /* remove breakpoint. hw will only be updated if the target
+ * is currently halted.
* However, this method can be invoked on unresponsive targets.
*/
int (*remove_breakpoint)(struct target *target, struct breakpoint *breakpoint);
+
+ /* add watchpoint ... see add_breakpoint() comment above. */
int (*add_watchpoint)(struct target *target, struct watchpoint *watchpoint);
- /* remove watchpoint. hw will only be updated if the target is currently halted.
+
+ /* remove watchpoint. hw will only be updated if the target
+ * is currently halted.
* However, this method can be invoked on unresponsive targets.
*/
int (*remove_watchpoint)(struct target *target, struct watchpoint *watchpoint);
- /* target algorithm support */
- int (*run_algorithm_imp)(struct target *target, int num_mem_params, struct mem_param *mem_params, int num_reg_params, struct reg_param *reg_param, uint32_t entry_point, uint32_t exit_point, int timeout_ms, void *arch_info);
/**
* Target algorithm support. Do @b not call this method directly,
* use target_run_algorithm() instead.
*/
int (*run_algorithm)(struct target *target, int num_mem_params, struct mem_param *mem_params, int num_reg_params, struct reg_param *reg_param, uint32_t entry_point, uint32_t exit_point, int timeout_ms, void *arch_info);
- int (*register_commands)(struct command_context_s *cmd_ctx);
+ const struct command_registration *commands;
/* called when target is created */
int (*target_create)(struct target *target, Jim_Interp *interp);
/* returns JIM_OK, or JIM_ERR, or JIM_CONTINUE - if option not understood */
int (*target_jim_commands)(struct target *target, Jim_GetOptInfo *goi);
- /* invoked after JTAG chain has been examined & validated. During
- * this stage the target is examined and any additional setup is
- * performed.
+ /**
+ * This method is used to perform target setup that requires
+ * JTAG access.
*
- * invoked every time after the jtag chain has been validated/examined
+ * This may be called multiple times. It is called after the
+ * scan chain is initially validated, or later after the target
+ * is enabled by a JRC. It may also be called during some
+ * parts of the reset sequence.
+ *
+ * For one-time initialization tasks, use target_was_examined()
+ * and target_set_examined(). For example, probe the hardware
+ * before setting up chip-specific state, and then set that
+ * flag so you don't do that again.
*/
int (*examine)(struct target *target);
+
/* Set up structures for target.
*
* It is illegal to talk to the target at this stage as this fn is invoked
* before the JTAG chain has been examined/verified
* */
- int (*init_target)(struct command_context_s *cmd_ctx, struct target *target);
+ int (*init_target)(struct command_context *cmd_ctx, struct target *target);
/* translate from virtual to physical address. Default implementation is successful
* no-op(i.e. virtual==physical).
int (*mmu)(struct target *target, int *enabled);
- /* Read coprocessor - arm specific. Default implementation returns error. */
- int (*mrc)(struct target *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t *value);
-
- /* Write coprocessor. Default implementation returns error. */
- int (*mcr)(struct target *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t value);
+ /* after reset is complete, the target can check if things are properly set up.
+ *
+ * This can be used to check if e.g. DCC memory writes have been enabled for
+ * arm7/9 targets, which they really should except in the most contrived
+ * circumstances.
+ */
+ int (*check_reset)(struct target *target);
};
#endif // TARGET_TYPE_H
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