unicorn/qemu/target-sparc/int64_helper.c
Artyom Tarasenko af0e282ab1
target-sparc: fix Trap Based Address Register behavior for sparc64
Accoding the chapter 7.6 Trap Processing of the SPARC Architecture Manual v9,
the Trap Based Address Register is not modified as a trap is taken.

This fix allows booting FreeBSD-10.3-RELEASE-sparc64.

Backports commit de5f1077446ca455342db149737bdc395a7b9882 from qemu
2018-02-23 13:39:59 -05:00

128 lines
3.7 KiB
C

/*
* Sparc64 interrupt helpers
*
* Copyright (c) 2003-2005 Fabrice Bellard
*
* 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/>.
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "exec/helper-proto.h"
void sparc_cpu_do_interrupt(CPUState *cs)
{
SPARCCPU *cpu = SPARC_CPU(cs->uc, cs);
CPUSPARCState *env = &cpu->env;
int intno = cs->exception_index;
trap_state *tsptr;
/* Compute PSR before exposing state. */
if (env->cc_op != CC_OP_FLAGS) {
cpu_get_psr(env);
}
#if !defined(CONFIG_USER_ONLY)
if (env->tl >= env->maxtl) {
cpu_abort(cs, "Trap 0x%04x while trap level (%d) >= MAXTL (%d),"
" Error state", cs->exception_index, env->tl, env->maxtl);
return;
}
#endif
if (env->tl < env->maxtl - 1) {
env->tl++;
} else {
env->pstate |= PS_RED;
if (env->tl < env->maxtl) {
env->tl++;
}
}
tsptr = cpu_tsptr(env);
tsptr->tstate = (cpu_get_ccr(env) << 32) |
((env->asi & 0xff) << 24) | ((env->pstate & 0xf3f) << 8) |
cpu_get_cwp64(env);
tsptr->tpc = env->pc;
tsptr->tnpc = env->npc;
tsptr->tt = intno;
switch (intno) {
case TT_IVEC:
cpu_change_pstate(env, PS_PEF | PS_PRIV | PS_IG);
break;
case TT_TFAULT:
case TT_DFAULT:
case TT_TMISS: case TT_TMISS+1: case TT_TMISS+2: case TT_TMISS+3:
case TT_DMISS: case TT_DMISS+1: case TT_DMISS+2: case TT_DMISS+3:
case TT_DPROT: case TT_DPROT+1: case TT_DPROT+2: case TT_DPROT+3:
cpu_change_pstate(env, PS_PEF | PS_PRIV | PS_MG);
break;
default:
cpu_change_pstate(env, PS_PEF | PS_PRIV | PS_AG);
break;
}
if (intno == TT_CLRWIN) {
cpu_set_cwp(env, cpu_cwp_dec(env, env->cwp - 1));
} else if ((intno & 0x1c0) == TT_SPILL) {
cpu_set_cwp(env, cpu_cwp_dec(env, env->cwp - env->cansave - 2));
} else if ((intno & 0x1c0) == TT_FILL) {
cpu_set_cwp(env, cpu_cwp_inc(env, env->cwp + 1));
}
env->pc = env->tbr & ~0x7fffULL;
env->pc |= ((env->tl > 1) ? 1 << 14 : 0) | (intno << 5);
env->npc = env->pc + 4;
cs->exception_index = -1;
}
trap_state *cpu_tsptr(CPUSPARCState* env)
{
return &env->ts[env->tl & MAXTL_MASK];
}
static bool do_modify_softint(CPUSPARCState *env, uint32_t value)
{
if (env->softint != value) {
env->softint = value;
#if !defined(CONFIG_USER_ONLY)
if (cpu_interrupts_enabled(env)) {
//cpu_check_irqs(env);
}
#endif
return true;
}
return false;
}
void helper_set_softint(CPUSPARCState *env, uint64_t value)
{
if (do_modify_softint(env, env->softint | (uint32_t)value)) {
//trace_int_helper_set_softint(env->softint);
}
}
void helper_clear_softint(CPUSPARCState *env, uint64_t value)
{
if (do_modify_softint(env, env->softint & (uint32_t)~value)) {
//trace_int_helper_clear_softint(env->softint);
}
}
void helper_write_softint(CPUSPARCState *env, uint64_t value)
{
if (do_modify_softint(env, (uint32_t)value)) {
//trace_int_helper_write_softint(env->softint);
}
}