128 lines
2.9 KiB
C
128 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/***************************************************************************
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* Copyright (C) 2005 by Dominic Rath *
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* Dominic.Rath@gmx.de *
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* *
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* Copyright (C) 2007,2008 Øyvind Harboe *
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* oyvind.harboe@zylin.com *
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***************************************************************************/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "register.h"
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#include <helper/log.h>
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/**
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* @file
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* Holds utilities to work with register caches.
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*
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* OpenOCD uses machine registers internally, and exposes them by name
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* to Tcl scripts. Sets of related registers are grouped into caches.
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* For example, a CPU core will expose a set of registers, and there
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* may be separate registers associated with debug or trace modules.
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*/
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struct reg *register_get_by_number(struct reg_cache *first,
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uint32_t reg_num, bool search_all)
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{
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struct reg_cache *cache = first;
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while (cache) {
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for (unsigned int i = 0; i < cache->num_regs; i++) {
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if (!cache->reg_list[i].exist)
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continue;
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if (cache->reg_list[i].number == reg_num)
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return &(cache->reg_list[i]);
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}
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if (!search_all)
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break;
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cache = cache->next;
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}
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return NULL;
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}
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struct reg *register_get_by_name(struct reg_cache *first,
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const char *name, bool search_all)
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{
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struct reg_cache *cache = first;
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while (cache) {
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for (unsigned int i = 0; i < cache->num_regs; i++) {
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if (!cache->reg_list[i].exist)
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continue;
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if (strcmp(cache->reg_list[i].name, name) == 0)
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return &(cache->reg_list[i]);
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}
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if (!search_all)
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break;
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cache = cache->next;
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}
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return NULL;
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}
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struct reg_cache **register_get_last_cache_p(struct reg_cache **first)
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{
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struct reg_cache **cache_p = first;
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if (*cache_p)
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while (*cache_p)
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cache_p = &((*cache_p)->next);
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else
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return first;
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return cache_p;
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}
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void register_unlink_cache(struct reg_cache **cache_p, const struct reg_cache *cache)
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{
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while (*cache_p && *cache_p != cache)
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cache_p = &((*cache_p)->next);
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if (*cache_p)
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*cache_p = cache->next;
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}
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/** Marks the contents of the register cache as invalid (and clean). */
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void register_cache_invalidate(struct reg_cache *cache)
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{
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struct reg *reg = cache->reg_list;
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for (unsigned int n = cache->num_regs; n != 0; n--, reg++) {
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if (!reg->exist)
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continue;
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reg->valid = false;
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reg->dirty = false;
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}
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}
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static int register_get_dummy_core_reg(struct reg *reg)
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{
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return ERROR_OK;
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}
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static int register_set_dummy_core_reg(struct reg *reg, uint8_t *buf)
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{
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reg->dirty = true;
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reg->valid = true;
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return ERROR_OK;
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}
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static const struct reg_arch_type dummy_type = {
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.get = register_get_dummy_core_reg,
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.set = register_set_dummy_core_reg,
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};
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void register_init_dummy(struct reg *reg)
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{
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reg->type = &dummy_type;
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}
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