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/*
* CRIS gdb server stub
*
* Copyright (c) 2003-2005 Fabrice Bellard
* Copyright (c) 2013 SUSE LINUX Products GmbH
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
static int
read_register_crisv10(CPUCRISState *env, uint8_t *mem_buf, int n)
{
if (n < 15) {
return gdb_get_reg32(mem_buf, env->regs[n]);
}
if (n == 15) {
return gdb_get_reg32(mem_buf, env->pc);
}
if (n < 32) {
switch (n) {
case 16:
return gdb_get_reg8(mem_buf, env->pregs[n - 16]);
case 17:
return gdb_get_reg8(mem_buf, env->pregs[n - 16]);
case 20:
case 21:
return gdb_get_reg16(mem_buf, env->pregs[n - 16]);
default:
if (n >= 23) {
return gdb_get_reg32(mem_buf, env->pregs[n - 16]);
}
break;
}
}
return 0;
}
static int cpu_gdb_read_register(CPUCRISState *env, uint8_t *mem_buf, int n)
{
uint8_t srs;
if (env->pregs[PR_VR] < 32) {
return read_register_crisv10(env, mem_buf, n);
}
srs = env->pregs[PR_SRS];
if (n < 16) {
return gdb_get_reg32(mem_buf, env->regs[n]);
}
if (n >= 21 && n < 32) {
return gdb_get_reg32(mem_buf, env->pregs[n - 16]);
}
if (n >= 33 && n < 49) {
return gdb_get_reg32(mem_buf, env->sregs[srs][n - 33]);
}
switch (n) {
case 16:
return gdb_get_reg8(mem_buf, env->pregs[0]);
case 17:
return gdb_get_reg8(mem_buf, env->pregs[1]);
case 18:
return gdb_get_reg32(mem_buf, env->pregs[2]);
case 19:
return gdb_get_reg8(mem_buf, srs);
case 20:
return gdb_get_reg16(mem_buf, env->pregs[4]);
case 32:
return gdb_get_reg32(mem_buf, env->pc);
}
return 0;
}
static int cpu_gdb_write_register(CPUCRISState *env, uint8_t *mem_buf, int n)
{
uint32_t tmp;
if (n > 49) {
return 0;
}
tmp = ldl_p(mem_buf);
if (n < 16) {
env->regs[n] = tmp;
}
if (n >= 21 && n < 32) {
env->pregs[n - 16] = tmp;
}
/* FIXME: Should support function regs be writable? */
switch (n) {
case 16:
return 1;
case 17:
return 1;
case 18:
env->pregs[PR_PID] = tmp;
break;
case 19:
return 1;
case 20:
return 2;
case 32:
env->pc = tmp;
break;
}
return 4;
}
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