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/*
* Copyright (c) 2011 - 2019, Max Filippov, Open Source and Linux Lab.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the Open Source and Linux Lab nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "qemu/osdep.h"
#include "qemu/log.h"
#include "cpu.h"
#include "exec/helper-proto.h"
#include "qemu/host-utils.h"
#include "exec/exec-all.h"
#include "exec/address-spaces.h"
static void tb_invalidate_virtual_addr(CPUXtensaState *env, uint32_t vaddr)
{
uint32_t paddr;
uint32_t page_size;
unsigned access;
int ret = xtensa_get_physical_addr(env, false, vaddr, 2, 0,
&paddr, &page_size, &access);
if (ret == 0) {
tb_invalidate_phys_addr(&address_space_memory, paddr,
MEMTXATTRS_UNSPECIFIED);
}
}
void HELPER(wsr_ibreakenable)(CPUXtensaState *env, uint32_t v)
{
uint32_t change = v ^ env->sregs[IBREAKENABLE];
unsigned i;
for (i = 0; i < env->config->nibreak; ++i) {
if (change & (1 << i)) {
tb_invalidate_virtual_addr(env, env->sregs[IBREAKA + i]);
}
}
env->sregs[IBREAKENABLE] = v & ((1 << env->config->nibreak) - 1);
}
void HELPER(wsr_ibreaka)(CPUXtensaState *env, uint32_t i, uint32_t v)
{
if (env->sregs[IBREAKENABLE] & (1 << i) && env->sregs[IBREAKA + i] != v) {
tb_invalidate_virtual_addr(env, env->sregs[IBREAKA + i]);
tb_invalidate_virtual_addr(env, v);
}
env->sregs[IBREAKA + i] = v;
}
static void set_dbreak(CPUXtensaState *env, unsigned i, uint32_t dbreaka,
uint32_t dbreakc)
{
CPUState *cs = env_cpu(env);
int flags = BP_CPU | BP_STOP_BEFORE_ACCESS;
uint32_t mask = dbreakc | ~DBREAKC_MASK;
if (env->cpu_watchpoint[i]) {
cpu_watchpoint_remove_by_ref(cs, env->cpu_watchpoint[i]);
}
if (dbreakc & DBREAKC_SB) {
flags |= BP_MEM_WRITE;
}
if (dbreakc & DBREAKC_LB) {
flags |= BP_MEM_READ;
}
/* contiguous mask after inversion is one less than some power of 2 */
if ((~mask + 1) & ~mask) {
qemu_log_mask(LOG_GUEST_ERROR,
"DBREAKC mask is not contiguous: 0x%08x\n", dbreakc);
/* cut mask after the first zero bit */
mask = 0xffffffff << (32 - clo32(mask));
}
if (cpu_watchpoint_insert(cs, dbreaka & mask, ~mask + 1,
flags, &env->cpu_watchpoint[i])) {
env->cpu_watchpoint[i] = NULL;
qemu_log_mask(LOG_GUEST_ERROR,
"Failed to set data breakpoint at 0x%08x/%d\n",
dbreaka & mask, ~mask + 1);
}
}
void HELPER(wsr_dbreaka)(CPUXtensaState *env, uint32_t i, uint32_t v)
{
uint32_t dbreakc = env->sregs[DBREAKC + i];
if ((dbreakc & DBREAKC_SB_LB) &&
env->sregs[DBREAKA + i] != v) {
set_dbreak(env, i, v, dbreakc);
}
env->sregs[DBREAKA + i] = v;
}
void HELPER(wsr_dbreakc)(CPUXtensaState *env, uint32_t i, uint32_t v)
{
if ((env->sregs[DBREAKC + i] ^ v) & (DBREAKC_SB_LB | DBREAKC_MASK)) {
if (v & DBREAKC_SB_LB) {
set_dbreak(env, i, env->sregs[DBREAKA + i], v);
} else {
if (env->cpu_watchpoint[i]) {
CPUState *cs = env_cpu(env);
cpu_watchpoint_remove_by_ref(cs, env->cpu_watchpoint[i]);
env->cpu_watchpoint[i] = NULL;
}
}
}
env->sregs[DBREAKC + i] = v;
}
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