target/riscv: remove duplicate progbufsize field

* removed `progbuf_size`  field from `riscv_info`; added getter
* moved `impebreak` field from `riscv_info` to `riscv013_info`
  as implementation dependent field; added getter

Signed-off-by: Farid Khaydari <f.khaydari@syntacore.com>

src/target/riscv/program.c

@@ -183,8 +183,8 @@ int riscv_program_ebreak(struct riscv_program *p)
 {
 	struct target *target = p->target;
 	RISCV_INFO(r);
-	if (p->instruction_count == riscv_progbuf_size(p->target) &&
-			r->impebreak) {
+	if (p->instruction_count == riscv_progbuf_size(target) &&
+			r->get_impebreak(target)) {
 		return ERROR_OK;
 	}
 	return riscv_program_insert(p, ebreak());

src/target/riscv/riscv-011.c

@@ -2356,6 +2356,16 @@ static int riscv011_authdata_write(struct target *target, uint32_t value, unsign
 	return ERROR_OK;
 }
 
+static bool riscv011_get_impebreak(const struct target *target)
+{
+	return false;
+}
+
+static unsigned int riscv011_get_progbufsize(const struct target *target)
+{
+	return 0;
+}
+
 static int init_target(struct command_context *cmd_ctx,
 		struct target *target)
 {
@@ -2365,6 +2375,8 @@ static int init_target(struct command_context *cmd_ctx,
 	generic_info->authdata_read = &riscv011_authdata_read;
 	generic_info->authdata_write = &riscv011_authdata_write;
 	generic_info->print_info = &riscv011_print_info;
+	generic_info->get_impebreak = &riscv011_get_impebreak;
+	generic_info->get_progbufsize = &riscv011_get_progbufsize;
 
 	generic_info->version_specific = calloc(1, sizeof(riscv011_info_t));
 	if (!generic_info->version_specific)

src/target/riscv/riscv-013.c

@@ -67,6 +67,8 @@ static int read_memory(struct target *target, target_addr_t address,
 		uint32_t size, uint32_t count, uint8_t *buffer, uint32_t increment);
 static int write_memory(struct target *target, target_addr_t address,
 		uint32_t size, uint32_t count, const uint8_t *buffer);
+static bool riscv013_get_impebreak(const struct target *target);
+static unsigned int riscv013_get_progbufsize(const struct target *target);
 
 typedef enum {
 	HALT_GROUP,
@@ -153,7 +155,9 @@ typedef struct {
 	/* Number of abstract command data registers. */
 	unsigned datacount;
 	/* Number of words in the Program Buffer. */
-	unsigned progbufsize;
+	unsigned int progbufsize;
+	/* Hart contains an implicit ebreak at the end of the program buffer. */
+	bool impebreak;
 
 	/* We cache the read-only bits of sbcs here. */
 	uint32_t sbcs;
@@ -1310,9 +1314,7 @@ static unsigned int register_size(struct target *target, enum gdb_regno number)
 static bool has_sufficient_progbuf(struct target *target, unsigned size)
 {
 	RISCV013_INFO(info);
-	RISCV_INFO(r);
-
-	return info->progbufsize + r->impebreak >= size;
+	return info->progbufsize + info->impebreak >= size;
 }
 
 /**
@@ -2037,14 +2039,13 @@ static int examine(struct target *target)
 	LOG_TARGET_INFO(target, "datacount=%d progbufsize=%d",
 			info->datacount, info->progbufsize);
 
-	RISCV_INFO(r);
-	r->impebreak = get_field(dmstatus, DM_DMSTATUS_IMPEBREAK);
+	info->impebreak = get_field(dmstatus, DM_DMSTATUS_IMPEBREAK);
 
 	if (!has_sufficient_progbuf(target, 2)) {
 		LOG_TARGET_WARNING(target, "We won't be able to execute fence instructions on this "
 				"target. Memory may not always appear consistent. "
 				"(progbufsize=%d, impebreak=%d)", info->progbufsize,
-				r->impebreak);
+				info->impebreak);
 	}
 
 	if (info->progbufsize < 4 && riscv_enable_virtual) {
@@ -2060,6 +2061,8 @@ static int examine(struct target *target)
 	enum riscv_hart_state state_at_examine_start;
 	if (riscv_get_hart_state(target, &state_at_examine_start) != ERROR_OK)
 		return ERROR_FAIL;
+
+	RISCV_INFO(r);
 	const bool hart_halted_at_examine_start = state_at_examine_start == RISCV_STATE_HALTED;
 	if (!hart_halted_at_examine_start) {
 		r->prepped = true;
@@ -2073,10 +2076,6 @@ static int examine(struct target *target)
 	target->state = TARGET_HALTED;
 	target->debug_reason = hart_halted_at_examine_start ? DBG_REASON_UNDEFINED : DBG_REASON_DBGRQ;
 
-	/* Without knowing anything else we can at least mess with the
-	 * program buffer. */
-	r->progbuf_size = info->progbufsize;
-
 	result = riscv013_reg_examine_all(target);
 	if (result != ERROR_OK)
 		return result;
@@ -2817,6 +2816,8 @@ static int init_target(struct command_context *cmd_ctx,
 	generic_info->read_memory = read_memory;
 	generic_info->data_bits = &riscv013_data_bits;
 	generic_info->print_info = &riscv013_print_info;
+	generic_info->get_impebreak = &riscv013_get_impebreak;
+	generic_info->get_progbufsize = &riscv013_get_progbufsize;
 
 	generic_info->handle_became_unavailable = &handle_became_unavailable;
 	generic_info->tick = &tick;
@@ -4872,6 +4873,18 @@ static int write_memory(struct target *target, target_addr_t address,
 	return ret;
 }
 
+static bool riscv013_get_impebreak(const struct target *target)
+{
+	RISCV013_INFO(r);
+	return r->impebreak;
+}
+
+static unsigned int riscv013_get_progbufsize(const struct target *target)
+{
+	RISCV013_INFO(r);
+	return r->progbufsize;
+}
+
 static int arch_state(struct target *target)
 {
 	return ERROR_OK;

src/target/riscv/riscv.c

@@ -5569,7 +5569,7 @@ static enum riscv_halt_reason riscv_halt_reason(struct target *target)
 size_t riscv_progbuf_size(struct target *target)
 {
 	RISCV_INFO(r);
-	return r->progbuf_size;
+	return r->get_progbufsize(target);
 }
 
 int riscv_write_progbuf(struct target *target, int index, riscv_insn_t insn)

src/target/riscv/riscv.h

@@ -167,12 +167,6 @@ struct riscv_info {
 	 * most recent halt was not caused by a trigger, then this is -1. */
 	int64_t trigger_hit;
 
-	/* The number of entries in the program buffer. */
-	int progbuf_size;
-
-	/* This hart contains an implicit ebreak at the end of the program buffer. */
-	bool impebreak;
-
 	bool triggers_enumerated;
 
 	/* Decremented every scan, and when it reaches 0 we clear the learned
@@ -236,6 +230,9 @@ struct riscv_info {
 	int (*dmi_read)(struct target *target, uint32_t *value, uint32_t address);
 	int (*dmi_write)(struct target *target, uint32_t address, uint32_t value);
 
+	bool (*get_impebreak)(const struct target *target);
+	unsigned int (*get_progbufsize)(const struct target *target);
+
 	/* Get the DMI address of target's DM's register.
 	 * The function should return the passed address
 	 * if the target is not assigned a DM yet.