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// SPDX-License-Identifier: GPL-2.0-or-later
/***************************************************************************
* Copyright (C) 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* Copyright (C) 2007,2008 Øyvind Harboe *
* oyvind.harboe@zylin.com *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "register.h"
#include <helper/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_number(struct reg_cache *first,
uint32_t reg_num, bool search_all)
{
struct reg_cache *cache = first;
while (cache) {
for (unsigned int i = 0; i < cache->num_regs; i++) {
if (!cache->reg_list[i].exist)
continue;
if (cache->reg_list[i].number == reg_num)
return &(cache->reg_list[i]);
}
if (!search_all)
break;
cache = cache->next;
}
return NULL;
}
struct reg *register_get_by_name(struct reg_cache *first,
const char *name, bool search_all)
{
struct reg_cache *cache = first;
while (cache) {
for (unsigned int i = 0; i < cache->num_regs; i++) {
if (!cache->reg_list[i].exist)
continue;
if (strcmp(cache->reg_list[i].name, name) == 0)
return &(cache->reg_list[i]);
}
if (!search_all)
break;
cache = cache->next;
}
return NULL;
}
struct reg_cache **register_get_last_cache_p(struct reg_cache **first)
{
struct reg_cache **cache_p = first;
if (*cache_p)
while (*cache_p)
cache_p = &((*cache_p)->next);
else
return first;
return cache_p;
}
void register_unlink_cache(struct reg_cache **cache_p, const struct reg_cache *cache)
{
while (*cache_p && *cache_p != cache)
cache_p = &((*cache_p)->next);
if (*cache_p)
*cache_p = cache->next;
}
/** Marks the contents of the register cache as invalid (and clean). */
void register_cache_invalidate(struct reg_cache *cache)
{
for (unsigned int n = 0; n < cache->num_regs; n++) {
struct reg *reg = &cache->reg_list[n];
if (!reg->exist)
continue;
reg->valid = false;
reg->dirty = false;
}
}
static int register_get_dummy_core_reg(struct reg *reg)
{
return ERROR_OK;
}
static int register_set_dummy_core_reg(struct reg *reg, uint8_t *buf)
{
reg->dirty = true;
reg->valid = true;
return ERROR_OK;
}
static const struct reg_arch_type dummy_type = {
.get = register_get_dummy_core_reg,
.set = register_set_dummy_core_reg,
};
void register_init_dummy(struct reg *reg)
{
reg->type = &dummy_type;
}