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5ee5993001
IRQ modification is part of device emulation and should be done while the BQL is held to prevent races when MTTCG is enabled. This adds assertions in the hw emulation layer and wraps the calls from helpers in the BQL. Reported-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
242 lines
7.1 KiB
C
242 lines
7.1 KiB
C
/*
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* Sparc64 interrupt helpers
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*
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* Copyright (c) 2003-2005 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "qemu/main-loop.h"
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#include "cpu.h"
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#include "exec/helper-proto.h"
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#include "exec/log.h"
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#include "trace.h"
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#define DEBUG_PCALL
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#ifdef DEBUG_PCALL
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static const char * const excp_names[0x80] = {
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[TT_TFAULT] = "Instruction Access Fault",
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[TT_TMISS] = "Instruction Access MMU Miss",
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[TT_CODE_ACCESS] = "Instruction Access Error",
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[TT_ILL_INSN] = "Illegal Instruction",
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[TT_PRIV_INSN] = "Privileged Instruction",
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[TT_NFPU_INSN] = "FPU Disabled",
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[TT_FP_EXCP] = "FPU Exception",
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[TT_TOVF] = "Tag Overflow",
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[TT_CLRWIN] = "Clean Windows",
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[TT_DIV_ZERO] = "Division By Zero",
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[TT_DFAULT] = "Data Access Fault",
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[TT_DMISS] = "Data Access MMU Miss",
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[TT_DATA_ACCESS] = "Data Access Error",
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[TT_DPROT] = "Data Protection Error",
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[TT_UNALIGNED] = "Unaligned Memory Access",
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[TT_PRIV_ACT] = "Privileged Action",
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[TT_EXTINT | 0x1] = "External Interrupt 1",
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[TT_EXTINT | 0x2] = "External Interrupt 2",
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[TT_EXTINT | 0x3] = "External Interrupt 3",
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[TT_EXTINT | 0x4] = "External Interrupt 4",
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[TT_EXTINT | 0x5] = "External Interrupt 5",
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[TT_EXTINT | 0x6] = "External Interrupt 6",
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[TT_EXTINT | 0x7] = "External Interrupt 7",
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[TT_EXTINT | 0x8] = "External Interrupt 8",
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[TT_EXTINT | 0x9] = "External Interrupt 9",
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[TT_EXTINT | 0xa] = "External Interrupt 10",
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[TT_EXTINT | 0xb] = "External Interrupt 11",
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[TT_EXTINT | 0xc] = "External Interrupt 12",
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[TT_EXTINT | 0xd] = "External Interrupt 13",
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[TT_EXTINT | 0xe] = "External Interrupt 14",
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[TT_EXTINT | 0xf] = "External Interrupt 15",
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};
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#endif
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void sparc_cpu_do_interrupt(CPUState *cs)
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{
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SPARCCPU *cpu = SPARC_CPU(cs);
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CPUSPARCState *env = &cpu->env;
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int intno = cs->exception_index;
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trap_state *tsptr;
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/* Compute PSR before exposing state. */
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if (env->cc_op != CC_OP_FLAGS) {
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cpu_get_psr(env);
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}
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#ifdef DEBUG_PCALL
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if (qemu_loglevel_mask(CPU_LOG_INT)) {
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static int count;
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const char *name;
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if (intno < 0 || intno >= 0x1ff) {
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name = "Unknown";
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} else if (intno >= 0x180) {
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name = "Hyperprivileged Trap Instruction";
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} else if (intno >= 0x100) {
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name = "Trap Instruction";
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} else if (intno >= 0xc0) {
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name = "Window Fill";
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} else if (intno >= 0x80) {
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name = "Window Spill";
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} else {
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name = excp_names[intno];
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if (!name) {
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name = "Unknown";
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}
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}
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qemu_log("%6d: %s (v=%04x)\n", count, name, intno);
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log_cpu_state(cs, 0);
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#if 0
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{
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int i;
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uint8_t *ptr;
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qemu_log(" code=");
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ptr = (uint8_t *)env->pc;
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for (i = 0; i < 16; i++) {
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qemu_log(" %02x", ldub(ptr + i));
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}
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qemu_log("\n");
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}
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#endif
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count++;
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}
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#endif
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#if !defined(CONFIG_USER_ONLY)
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if (env->tl >= env->maxtl) {
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cpu_abort(cs, "Trap 0x%04x while trap level (%d) >= MAXTL (%d),"
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" Error state", cs->exception_index, env->tl, env->maxtl);
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return;
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}
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#endif
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if (env->tl < env->maxtl - 1) {
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env->tl++;
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} else {
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env->pstate |= PS_RED;
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if (env->tl < env->maxtl) {
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env->tl++;
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}
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}
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tsptr = cpu_tsptr(env);
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tsptr->tstate = (cpu_get_ccr(env) << 32) |
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((env->asi & 0xff) << 24) | ((env->pstate & 0xf3f) << 8) |
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cpu_get_cwp64(env);
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tsptr->tpc = env->pc;
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tsptr->tnpc = env->npc;
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tsptr->tt = intno;
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if (cpu_has_hypervisor(env)) {
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env->htstate[env->tl] = env->hpstate;
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/* XXX OpenSPARC T1 - UltraSPARC T3 have MAXPTL=2
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but this may change in the future */
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if (env->tl > 2) {
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env->hpstate |= HS_PRIV;
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}
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}
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if (env->def->features & CPU_FEATURE_GL) {
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tsptr->tstate |= (env->gl & 7ULL) << 40;
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cpu_gl_switch_gregs(env, env->gl + 1);
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env->gl++;
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}
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switch (intno) {
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case TT_IVEC:
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if (!cpu_has_hypervisor(env)) {
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cpu_change_pstate(env, PS_PEF | PS_PRIV | PS_IG);
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}
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break;
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case TT_TFAULT:
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case TT_DFAULT:
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case TT_TMISS ... TT_TMISS + 3:
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case TT_DMISS ... TT_DMISS + 3:
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case TT_DPROT ... TT_DPROT + 3:
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if (cpu_has_hypervisor(env)) {
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env->hpstate |= HS_PRIV;
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env->pstate = PS_PEF | PS_PRIV;
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} else {
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cpu_change_pstate(env, PS_PEF | PS_PRIV | PS_MG);
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}
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break;
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case TT_INSN_REAL_TRANSLATION_MISS ... TT_DATA_REAL_TRANSLATION_MISS:
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case TT_HTRAP ... TT_HTRAP + 127:
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env->hpstate |= HS_PRIV;
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break;
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default:
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cpu_change_pstate(env, PS_PEF | PS_PRIV | PS_AG);
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break;
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}
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if (intno == TT_CLRWIN) {
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cpu_set_cwp(env, cpu_cwp_dec(env, env->cwp - 1));
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} else if ((intno & 0x1c0) == TT_SPILL) {
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cpu_set_cwp(env, cpu_cwp_dec(env, env->cwp - env->cansave - 2));
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} else if ((intno & 0x1c0) == TT_FILL) {
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cpu_set_cwp(env, cpu_cwp_inc(env, env->cwp + 1));
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}
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if (cpu_hypervisor_mode(env)) {
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env->pc = (env->htba & ~0x3fffULL) | (intno << 5);
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} else {
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env->pc = env->tbr & ~0x7fffULL;
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env->pc |= ((env->tl > 1) ? 1 << 14 : 0) | (intno << 5);
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}
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env->npc = env->pc + 4;
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cs->exception_index = -1;
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}
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trap_state *cpu_tsptr(CPUSPARCState* env)
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{
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return &env->ts[env->tl & MAXTL_MASK];
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}
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static bool do_modify_softint(CPUSPARCState *env, uint32_t value)
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{
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if (env->softint != value) {
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env->softint = value;
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#if !defined(CONFIG_USER_ONLY)
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if (cpu_interrupts_enabled(env)) {
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qemu_mutex_lock_iothread();
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cpu_check_irqs(env);
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qemu_mutex_unlock_iothread();
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}
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#endif
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return true;
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}
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return false;
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}
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void helper_set_softint(CPUSPARCState *env, uint64_t value)
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{
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if (do_modify_softint(env, env->softint | (uint32_t)value)) {
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trace_int_helper_set_softint(env->softint);
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}
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}
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void helper_clear_softint(CPUSPARCState *env, uint64_t value)
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{
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if (do_modify_softint(env, env->softint & (uint32_t)~value)) {
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trace_int_helper_clear_softint(env->softint);
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}
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}
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void helper_write_softint(CPUSPARCState *env, uint64_t value)
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{
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if (do_modify_softint(env, (uint32_t)value)) {
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trace_int_helper_write_softint(env->softint);
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}
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}
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