target: create/use register_cache_invalidate()

[fw/openocd] / src / target / register.c

diff --git a/src/target/register.c b/src/target/register.c
index d9ef53e31f0e43a2929bf8fd6aa22bffb57b51dd..392455d013883c8b7d0dcdd1b802e7286c39bcd2 100644 (file)
--- a/src/target/register.c
+++ b/src/target/register.c
@@ -28,11 +28,20 @@
 #include "register.h"
 #include "log.h"
 
+/**
+ * @file
+ * Holds utilities to work with register caches.
+ *
+ * OpenOCD uses machine registers internally, and exposes them by name
+ * to Tcl scripts.  Sets of related registers are grouped into caches.
+ * For example, a CPU core will expose a set of registers, and there
+ * may be separate registers associated with debug or trace modules.
+ */
 
 struct reg* register_get_by_name(struct reg_cache *first,
                const char *name, bool search_all)
 {
-       int i;
+       unsigned i;
        struct reg_cache *cache = first;
 
        while (cache)
@@ -65,6 +74,17 @@ struct reg_cache** register_get_last_cache_p(struct reg_cache **first)
        return cache_p;
 }
 
+/** Marks the contents of the register cache as invalid (and clean). */
+void register_cache_invalidate(struct reg_cache *cache)
+{
+       struct reg *reg = cache->reg_list;
+
+       for (unsigned n = cache->num_regs; n != 0; n--, reg++) {
+               reg->valid = 0;
+               reg->dirty = 0;
+       }
+}
+
 static int register_get_dummy_core_reg(struct reg *reg)
 {
        return ERROR_OK;