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/*
* MicroBlaze 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 2.1 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/>.
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "gdbstub/helpers.h"
/*
* GDB expects SREGs in the following order:
* PC, MSR, EAR, ESR, FSR, BTR, EDR, PID, ZPR, TLBX, TLBSX, TLBLO, TLBHI.
*
* PID, ZPR, TLBx, TLBsx, TLBLO, and TLBHI aren't modeled, so we don't
* map them to anything and return a value of 0 instead.
*/
enum {
GDB_PC = 32 + 0,
GDB_MSR = 32 + 1,
GDB_EAR = 32 + 2,
GDB_ESR = 32 + 3,
GDB_FSR = 32 + 4,
GDB_BTR = 32 + 5,
GDB_PVR0 = 32 + 6,
GDB_PVR11 = 32 + 17,
GDB_EDR = 32 + 18,
};
enum {
GDB_SP_SHL,
GDB_SP_SHR,
};
int mb_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
{
MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
CPUClass *cc = CPU_GET_CLASS(cs);
CPUMBState *env = &cpu->env;
uint32_t val;
if (n > cc->gdb_num_core_regs) {
return 0;
}
switch (n) {
case 1 ... 31:
val = env->regs[n];
break;
case GDB_PC:
val = env->pc;
break;
case GDB_MSR:
val = mb_cpu_read_msr(env);
break;
case GDB_EAR:
val = env->ear;
break;
case GDB_ESR:
val = env->esr;
break;
case GDB_FSR:
val = env->fsr;
break;
case GDB_BTR:
val = env->btr;
break;
case GDB_PVR0 ... GDB_PVR11:
/* PVR12 is intentionally skipped */
val = cpu->cfg.pvr_regs[n - GDB_PVR0];
break;
case GDB_EDR:
val = env->edr;
break;
default:
/* Other SRegs aren't modeled, so report a value of 0 */
val = 0;
break;
}
return gdb_get_reg32(mem_buf, val);
}
int mb_cpu_gdb_read_stack_protect(CPUMBState *env, GByteArray *mem_buf, int n)
{
uint32_t val;
switch (n) {
case GDB_SP_SHL:
val = env->slr;
break;
case GDB_SP_SHR:
val = env->shr;
break;
default:
return 0;
}
return gdb_get_reg32(mem_buf, val);
}
int mb_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
{
MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
CPUClass *cc = CPU_GET_CLASS(cs);
CPUMBState *env = &cpu->env;
uint32_t tmp;
if (n > cc->gdb_num_core_regs) {
return 0;
}
tmp = ldl_p(mem_buf);
switch (n) {
case 1 ... 31:
env->regs[n] = tmp;
break;
case GDB_PC:
env->pc = tmp;
break;
case GDB_MSR:
mb_cpu_write_msr(env, tmp);
break;
case GDB_EAR:
env->ear = tmp;
break;
case GDB_ESR:
env->esr = tmp;
break;
case GDB_FSR:
env->fsr = tmp;
break;
case GDB_BTR:
env->btr = tmp;
break;
case GDB_EDR:
env->edr = tmp;
break;
}
return 4;
}
int mb_cpu_gdb_write_stack_protect(CPUMBState *env, uint8_t *mem_buf, int n)
{
switch (n) {
case GDB_SP_SHL:
env->slr = ldl_p(mem_buf);
break;
case GDB_SP_SHR:
env->shr = ldl_p(mem_buf);
break;
default:
return 0;
}
return 4;
}
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