From e6f7cf6ee8fec8286b025c989064b09f3f90325b Mon Sep 17 00:00:00 2001
From: Evgeniy Didin <didin@synopsys.com>
Date: Thu, 20 Jun 2019 18:17:41 +0300
Subject: [PATCH] ARC: add private register_get_by_name function

In ARC case we have TCL function arc_set_reg_exists to mark register as existing.
In this function register_get_by_name() is called, which currently skips
register, if it is not existing. Thats why we introduce private version without
existance check.

Commit is based on:
https://github.com/zephyrproject-rtos/openocd/commit/5b23e3b553a916809ac59967c06278942c37447d

Signed-off-by: Evgeniy Didin <didin@synopsys.com>
---
 src/target/arc.c | 29 +++++++++++++++++++++++++++++
 src/target/arc.h |  4 ++++
 2 files changed, 33 insertions(+)

diff --git a/src/target/arc.c b/src/target/arc.c
index 6dad3f89b..02e861394 100644
--- a/src/target/arc.c
+++ b/src/target/arc.c
@@ -38,6 +38,35 @@ void arc_add_reg_data_type(struct target *target,
        list_add_tail(&data_type->list, &arc->reg_data_types);
 }
 
+/* ----- Exported functions ------------------------------------------------ */
+
+/**
+ * Private implementation of register_get_by_name() for ARC that
+ * doesn't skip not [yet] existing registers. Used in many places
+ * for iteration through registers and even for marking required registers as
+ * existing.
+ */
+struct reg *arc32_register_get_by_name(struct reg_cache *first,
+		const char *name, bool search_all)
+{
+	unsigned i;
+	struct reg_cache *cache = first;
+
+	while (cache) {
+		for (i = 0; i < cache->num_regs; i++) {
+			if (strcmp(cache->reg_list[i].name, name) == 0)
+				return &(cache->reg_list[i]);
+		}
+
+		if (search_all)
+			cache = cache->next;
+		else
+			break;
+	}
+
+	return NULL;
+}
+
 
 /* Initialize arc_common structure, which passes to openocd target instance */
 int arc_init_arch_info(struct target *target, struct arc_common *arc,
diff --git a/src/target/arc.h b/src/target/arc.h
index 5f63ce385..59499c680 100644
--- a/src/target/arc.h
+++ b/src/target/arc.h
@@ -216,4 +216,8 @@ int arc_add_reg(struct target *target, struct arc_reg_desc *arc_reg,
 int arc_build_reg_cache(struct target *target);
 int arc_build_bcr_reg_cache(struct target *target);
 
+
+struct reg *arc32_register_get_by_name(struct reg_cache *first,
+					const char *name, bool search_all);
+
 #endif /* ARC_H */