OpenE2K
/
qemu-e2k
13
4
Fork 0
Code Issues 4 Pull Requests Projects 2 Releases Activity
qemu-e2k/target/sparc/int64_helper.c

305 lines
9.2 KiB
C
Raw Blame History

/*
* 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 2.1 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 "qemu/main-loop.h"
#include "cpu.h"
#include "exec/helper-proto.h"
#include "exec/log.h"
#include "trace.h"
#define DEBUG_PCALL
#ifdef DEBUG_PCALL
static const char * const excp_names[0x80] = {
[TT_TFAULT] = "Instruction Access Fault",
[TT_TMISS] = "Instruction Access MMU Miss",
[TT_CODE_ACCESS] = "Instruction Access Error",
[TT_ILL_INSN] = "Illegal Instruction",
[TT_PRIV_INSN] = "Privileged Instruction",
[TT_NFPU_INSN] = "FPU Disabled",
[TT_FP_EXCP] = "FPU Exception",
[TT_TOVF] = "Tag Overflow",
[TT_CLRWIN] = "Clean Windows",
[TT_DIV_ZERO] = "Division By Zero",
[TT_DFAULT] = "Data Access Fault",
[TT_DMISS] = "Data Access MMU Miss",
[TT_DATA_ACCESS] = "Data Access Error",
[TT_DPROT] = "Data Protection Error",
[TT_UNALIGNED] = "Unaligned Memory Access",
[TT_PRIV_ACT] = "Privileged Action",
[TT_EXTINT | 0x1] = "External Interrupt 1",
[TT_EXTINT | 0x2] = "External Interrupt 2",
[TT_EXTINT | 0x3] = "External Interrupt 3",
[TT_EXTINT | 0x4] = "External Interrupt 4",
[TT_EXTINT | 0x5] = "External Interrupt 5",
[TT_EXTINT | 0x6] = "External Interrupt 6",
[TT_EXTINT | 0x7] = "External Interrupt 7",
[TT_EXTINT | 0x8] = "External Interrupt 8",
[TT_EXTINT | 0x9] = "External Interrupt 9",
[TT_EXTINT | 0xa] = "External Interrupt 10",
[TT_EXTINT | 0xb] = "External Interrupt 11",
[TT_EXTINT | 0xc] = "External Interrupt 12",
[TT_EXTINT | 0xd] = "External Interrupt 13",
[TT_EXTINT | 0xe] = "External Interrupt 14",
[TT_EXTINT | 0xf] = "External Interrupt 15",
};
#endif
void cpu_check_irqs(CPUSPARCState *env)
{
CPUState *cs;
uint32_t pil = env->pil_in |
(env->softint & ~(SOFTINT_TIMER | SOFTINT_STIMER));
/* We should be holding the BQL before we mess with IRQs */
g_assert(qemu_mutex_iothread_locked());
/* TT_IVEC has a higher priority (16) than TT_EXTINT (31..17) */
if (env->ivec_status & 0x20) {
return;
}
cs = env_cpu(env);
/*
* check if TM or SM in SOFTINT are set
* setting these also causes interrupt 14
*/
if (env->softint & (SOFTINT_TIMER | SOFTINT_STIMER)) {
pil |= 1 << 14;
}
/*
* The bit corresponding to psrpil is (1<< psrpil),
* the next bit is (2 << psrpil).
*/
if (pil < (2 << env->psrpil)) {
if (cs->interrupt_request & CPU_INTERRUPT_HARD) {
trace_sparc64_cpu_check_irqs_reset_irq(env->interrupt_index);
env->interrupt_index = 0;
cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
}
return;
}
if (cpu_interrupts_enabled(env)) {
unsigned int i;
for (i = 15; i > env->psrpil; i--) {
if (pil & (1 << i)) {
int old_interrupt = env->interrupt_index;
int new_interrupt = TT_EXTINT | i;
if (unlikely(env->tl > 0 && cpu_tsptr(env)->tt > new_interrupt
&& ((cpu_tsptr(env)->tt & 0x1f0) == TT_EXTINT))) {
trace_sparc64_cpu_check_irqs_noset_irq(env->tl,
cpu_tsptr(env)->tt,
new_interrupt);
} else if (old_interrupt != new_interrupt) {
env->interrupt_index = new_interrupt;
trace_sparc64_cpu_check_irqs_set_irq(i, old_interrupt,
new_interrupt);
cpu_interrupt(cs, CPU_INTERRUPT_HARD);
}
break;
}
}
} else if (cs->interrupt_request & CPU_INTERRUPT_HARD) {
trace_sparc64_cpu_check_irqs_disabled(pil, env->pil_in, env->softint,
env->interrupt_index);
env->interrupt_index = 0;
cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
}
}
void sparc_cpu_do_interrupt(CPUState *cs)
{
SPARCCPU *cpu = SPARC_CPU(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);
}
#ifdef DEBUG_PCALL
if (qemu_loglevel_mask(CPU_LOG_INT)) {
static int count;
const char *name;
if (intno < 0 || intno >= 0x1ff) {
name = "Unknown";
} else if (intno >= 0x180) {
name = "Hyperprivileged Trap Instruction";
} else if (intno >= 0x100) {
name = "Trap Instruction";
} else if (intno >= 0xc0) {
name = "Window Fill";
} else if (intno >= 0x80) {
name = "Window Spill";
} else {
name = excp_names[intno];
if (!name) {
name = "Unknown";
}
}
qemu_log("%6d: %s (v=%04x)\n", count, name, intno);
log_cpu_state(cs, 0);
#if 0
{
int i;
uint8_t *ptr;
qemu_log(" code=");
ptr = (uint8_t *)env->pc;
for (i = 0; i < 16; i++) {
qemu_log(" %02x", ldub(ptr + i));
}
qemu_log("\n");
}
#endif
count++;
}
#endif
#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 = sparc64_tstate(env);
tsptr->tpc = env->pc;
tsptr->tnpc = env->npc;
tsptr->tt = intno;
if (cpu_has_hypervisor(env)) {
env->htstate[env->tl] = env->hpstate;
/* XXX OpenSPARC T1 - UltraSPARC T3 have MAXPTL=2
but this may change in the future */
if (env->tl > 2) {
env->hpstate |= HS_PRIV;
}
}
if (env->def.features & CPU_FEATURE_GL) {
cpu_gl_switch_gregs(env, env->gl + 1);
env->gl++;
}
switch (intno) {
case TT_IVEC:
if (!cpu_has_hypervisor(env)) {
cpu_change_pstate(env, PS_PEF | PS_PRIV | PS_IG);
}
break;
case TT_TFAULT:
case TT_DFAULT:
case TT_TMISS ... TT_TMISS + 3:
case TT_DMISS ... TT_DMISS + 3:
case TT_DPROT ... TT_DPROT + 3:
if (cpu_has_hypervisor(env)) {
env->hpstate |= HS_PRIV;
env->pstate = PS_PEF | PS_PRIV;
} else {
cpu_change_pstate(env, PS_PEF | PS_PRIV | PS_MG);
}
break;
case TT_INSN_REAL_TRANSLATION_MISS ... TT_DATA_REAL_TRANSLATION_MISS:
case TT_HTRAP ... TT_HTRAP + 127:
env->hpstate |= HS_PRIV;
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));
}
if (cpu_hypervisor_mode(env)) {
env->pc = (env->htba & ~0x3fffULL) | (intno << 5);
} else {
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)) {
qemu_mutex_lock_iothread();
cpu_check_irqs(env);
qemu_mutex_unlock_iothread();
}
#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);
}
}
Reference in New Issue View Git Blame Copy Permalink